31 files changed, 10134 insertions, 0 deletions

diff --git a/sys/arm/xscale/ixp425/avila_ata.c b/sys/arm/xscale/ixp425/avila_ata.c
new file mode 100644
index 000000000000..9c5f2c2f2e2e
--- /dev/null
+++ b/sys/arm/xscale/ixp425/avila_ata.c
@@ -0,0 +1,556 @@
+/*-
+ * Copyright (c) 2006 Sam Leffler, Errno Consulting
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
+ *    redistribution must be conditioned upon including a substantially
+ *    similar Disclaimer requirement for further binary redistribution.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
+ * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+ * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGES.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+/*
+ * Compact Flash Support for the Avila Gateworks XScale boards.
+ * There are 1 or 2 optional CF slots operated in "True IDE" mode.
+ * Registers are on the Expansion Bus connected to CS1.  Interrupts
+ * are tied to GPIO pin 12.  No DMA, just PIO.
+ *
+ * See also http://www.intel.com/design/network/applnots/302456.htm.
+ */
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/time.h>
+#include <sys/bus.h>
+#include <sys/resource.h>
+#include <sys/rman.h>
+#include <sys/sysctl.h>
+#include <sys/endian.h>
+
+#include <machine/bus.h>
+#include <machine/cpu.h>
+#include <machine/cpufunc.h>
+#include <machine/resource.h>
+#include <machine/intr.h>
+#include <arm/xscale/ixp425/ixp425reg.h>
+#include <arm/xscale/ixp425/ixp425var.h>
+
+#include <sys/ata.h>
+#include <sys/sema.h>
+#include <sys/taskqueue.h>
+#include <vm/uma.h>
+#include <dev/ata/ata-all.h>
+#include <ata_if.h>
+
+#define	AVILA_IDE_GPIN	12		/* GPIO pin # */
+#define	AVILA_IDE_IRQ	IXP425_INT_GPIO_12
+#define	AVILA_IDE_CTRL	0x1e		/* control register */
+
+struct ata_avila_softc {
+	device_t		sc_dev;
+	bus_space_tag_t		sc_iot;
+	bus_space_handle_t	sc_exp_ioh;	/* Exp Bus config registers */
+	bus_space_handle_t	sc_ioh;		/* CS1 data registers */
+	struct bus_space	sc_expbus_tag;
+	struct resource		sc_ata;		/* hand-crafted for ATA */
+	int			sc_rid;		/* rid for IRQ */
+	struct resource		*sc_irq;	/* IRQ resource */
+	void			*sc_ih;		/* interrupt handler */
+	struct {
+		void	(*cb)(void *);
+		void	*arg;
+	} sc_intr[1];			/* NB: 1/channel */
+};
+
+static void ata_avila_intr(void *);
+bs_protos(ata);
+static	void ata_bs_rm_2_s(void *, bus_space_handle_t, bus_size_t,
+		u_int16_t *, bus_size_t);
+static	void ata_bs_wm_2_s(void *, bus_space_handle_t, bus_size_t,
+		const u_int16_t *, bus_size_t);
+
+static int
+ata_avila_probe(device_t dev)
+{
+	/* XXX any way to check? */
+	device_set_desc_copy(dev, "Gateworks Avila IDE/CF Controller");
+	return 0;
+}
+
+static int
+ata_avila_attach(device_t dev)
+{
+	struct ata_avila_softc *sc = device_get_softc(dev);
+	struct ixp425_softc *sa = device_get_softc(device_get_parent(dev));
+
+	sc->sc_dev = dev;
+	/* NB: borrow from parent */
+	sc->sc_iot = sa->sc_iot;
+	sc->sc_exp_ioh = sa->sc_exp_ioh;
+	if (bus_space_map(sc->sc_iot,
+	    IXP425_EXP_BUS_CS1_HWBASE, IXP425_EXP_BUS_CS1_SIZE, 0, &sc->sc_ioh))
+		panic("%s: unable to map Expansion Bus CS1 window", __func__);
+
+	/*
+	 * Craft special resource for ATA bus space ops
+	 * that go through the expansion bus and require
+	 * special hackery to ena/dis 16-bit operations.
+	 *
+	 * XXX probably should just make this generic for
+	 * accessing the expansion bus.
+	 */
+	sc->sc_expbus_tag.bs_cookie = sc;	/* NB: backpointer */
+	/* read single */
+	sc->sc_expbus_tag.bs_r_1	= ata_bs_r_1,
+	sc->sc_expbus_tag.bs_r_2	= ata_bs_r_2,
+	/* read multiple */
+	sc->sc_expbus_tag.bs_rm_2	= ata_bs_rm_2,
+	sc->sc_expbus_tag.bs_rm_2_s	= ata_bs_rm_2_s,
+	/* write (single) */
+	sc->sc_expbus_tag.bs_w_1	= ata_bs_w_1,
+	sc->sc_expbus_tag.bs_w_2	= ata_bs_w_2,
+	/* write multiple */
+	sc->sc_expbus_tag.bs_wm_2	= ata_bs_wm_2,
+	sc->sc_expbus_tag.bs_wm_2_s	= ata_bs_wm_2_s,
+
+	rman_set_bustag(&sc->sc_ata, &sc->sc_expbus_tag);
+	rman_set_bushandle(&sc->sc_ata, sc->sc_ioh);
+
+	GPIO_CONF_WRITE_4(sa, IXP425_GPIO_GPOER, 
+	    GPIO_CONF_READ_4(sa, IXP425_GPIO_GPOER) | (1<<AVILA_IDE_GPIN));
+	/* interrupt is active low */
+	GPIO_CONF_WRITE_4(sa, GPIO_TYPE_REG(AVILA_IDE_GPIN),
+	    GPIO_CONF_READ_4(sa, GPIO_TYPE_REG(AVILA_IDE_GPIN) |
+	    GPIO_TYPE(AVILA_IDE_GPIN, GPIO_TYPE_ACT_LOW)));
+
+	/* clear ISR */
+	GPIO_CONF_WRITE_4(sa, IXP425_GPIO_GPISR, (1<<AVILA_IDE_GPIN));
+
+	/* configure CS1 window, leaving timing unchanged */
+	EXP_BUS_WRITE_4(sc, EXP_TIMING_CS1_OFFSET,
+	    EXP_BUS_READ_4(sc, EXP_TIMING_CS1_OFFSET) |
+	        EXP_BYTE_EN | EXP_WR_EN | EXP_BYTE_RD16 | EXP_CS_EN);
+
+	/* setup interrupt */
+	sc->sc_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &sc->sc_rid,
+	    AVILA_IDE_IRQ, AVILA_IDE_IRQ, 1, RF_ACTIVE);
+	if (!sc->sc_irq)
+		panic("Unable to allocate irq %u.\n", AVILA_IDE_IRQ);
+	bus_setup_intr(dev, sc->sc_irq,
+	    INTR_TYPE_BIO | INTR_MPSAFE | INTR_ENTROPY,
+	    ata_avila_intr, sc, &sc->sc_ih);
+
+	/* attach channel on this controller */
+	device_add_child(dev, "ata", devclass_find_free_unit(ata_devclass, 0));
+	bus_generic_attach(dev);
+
+	return 0;
+}
+
+static int
+ata_avila_detach(device_t dev)
+{
+	struct ata_avila_softc *sc = device_get_softc(dev);
+	device_t *children;
+	int nc;
+
+	/* XXX quiesce gpio? */
+
+	/* detach & delete all children */
+	if (device_get_children(dev, &children, &nc) == 0) {
+	    if (nc > 0)
+		    device_delete_child(dev, children[0]);
+	    free(children, M_TEMP);
+	}
+
+	bus_teardown_intr(dev, sc->sc_irq, sc->sc_ih);
+	bus_release_resource(dev, SYS_RES_IRQ, sc->sc_rid, sc->sc_irq);
+
+	return 0;
+}
+
+static void
+ata_avila_intr(void *xsc)
+{
+	struct ata_avila_softc *sc = xsc;
+
+	if (sc->sc_intr[0].cb != NULL)
+		sc->sc_intr[0].cb(sc->sc_intr[0].arg);
+}
+
+static struct resource *
+ata_avila_alloc_resource(device_t dev, device_t child, int type, int *rid,
+		       u_long start, u_long end, u_long count, u_int flags)
+{
+	struct ata_avila_softc *sc = device_get_softc(dev);
+
+	KASSERT(type == SYS_RES_IRQ && *rid == ATA_IRQ_RID,
+	    ("type %u rid %u start %lu end %lu count %lu flags %u",
+	     type, *rid, start, end, count, flags));
+
+	/* doesn't matter what we return so reuse the real thing */
+	return sc->sc_irq;
+}
+
+static int
+ata_avila_release_resource(device_t dev, device_t child, int type, int rid,
+			 struct resource *r)
+{
+	KASSERT(type == SYS_RES_IRQ && rid == ATA_IRQ_RID,
+	    ("type %u rid %u", type, rid));
+	return 0;
+}
+
+static int
+ata_avila_setup_intr(device_t dev, device_t child, struct resource *irq, 
+		   int flags, driver_intr_t *function, void *argument,
+		   void **cookiep)
+{
+	struct ata_avila_softc *sc = device_get_softc(dev);
+	int unit = ((struct ata_channel *)device_get_softc(child))->unit;
+
+	KASSERT(unit == 0, ("unit %d", unit));
+	sc->sc_intr[unit].cb = function;
+	sc->sc_intr[unit].arg = argument;
+	*cookiep = sc;
+	return 0;
+}
+
+static int
+ata_avila_teardown_intr(device_t dev, device_t child, struct resource *irq,
+		      void *cookie)
+{
+	struct ata_avila_softc *sc = device_get_softc(dev);
+	int unit = ((struct ata_channel *)device_get_softc(child))->unit;
+
+	KASSERT(unit == 0, ("unit %d", unit));
+	sc->sc_intr[unit].cb = NULL;
+	sc->sc_intr[unit].arg = NULL;
+	return 0;
+}
+
+/*
+ * Bus space accessors for CF-IDE PIO operations.
+ */
+
+/*
+ * Enable/disable 16-bit ops on the expansion bus.
+ */
+static void __inline
+enable_16(struct ata_avila_softc *sc)
+{
+	EXP_BUS_WRITE_4(sc, EXP_TIMING_CS1_OFFSET,
+	    EXP_BUS_READ_4(sc, EXP_TIMING_CS1_OFFSET) &~ EXP_BYTE_EN);
+	DELAY(100);		/* XXX? */
+}
+
+static void __inline
+disable_16(struct ata_avila_softc *sc)
+{
+	DELAY(100);		/* XXX? */
+	EXP_BUS_WRITE_4(sc, EXP_TIMING_CS1_OFFSET,
+	    EXP_BUS_READ_4(sc, EXP_TIMING_CS1_OFFSET) | EXP_BYTE_EN);
+}
+
+uint8_t
+ata_bs_r_1(void *t, bus_space_handle_t h, bus_size_t o)
+{
+	struct ata_avila_softc *sc = t;
+
+	return bus_space_read_1(sc->sc_iot, h, o);
+}
+
+void
+ata_bs_w_1(void *t, bus_space_handle_t h, bus_size_t o, u_int8_t v)
+{
+	struct ata_avila_softc *sc = t;
+
+	bus_space_write_1(sc->sc_iot, h, o, v);
+}
+
+uint16_t
+ata_bs_r_2(void *t, bus_space_handle_t h, bus_size_t o)
+{
+	struct ata_avila_softc *sc = t;
+	uint16_t v;
+
+	enable_16(sc);
+	v = bus_space_read_2(sc->sc_iot, h, o);
+	disable_16(sc);
+	return v;
+}
+
+void
+ata_bs_w_2(void *t, bus_space_handle_t h, bus_size_t o, uint16_t v)
+{
+	struct ata_avila_softc *sc = t;
+
+	enable_16(sc);
+	bus_space_write_2(sc->sc_iot, h, o, v);
+	disable_16(sc);
+}
+
+void
+ata_bs_rm_2(void *t, bus_space_handle_t h, bus_size_t o,
+	u_int16_t *d, bus_size_t c)
+{
+	struct ata_avila_softc *sc = t;
+
+	enable_16(sc);
+	bus_space_read_multi_2(sc->sc_iot, h, o, d, c);
+	disable_16(sc);
+}
+
+void
+ata_bs_wm_2(void *t, bus_space_handle_t h, bus_size_t o,
+	const u_int16_t *d, bus_size_t c)
+{
+	struct ata_avila_softc *sc = t;
+
+	enable_16(sc);
+	bus_space_write_multi_2(sc->sc_iot, h, o, d, c);
+	disable_16(sc);
+}
+
+/* XXX workaround ata driver by (incorrectly) byte swapping stream cases */
+
+void
+ata_bs_rm_2_s(void *t, bus_space_handle_t h, bus_size_t o,
+	u_int16_t *d, bus_size_t c)
+{
+	struct ata_avila_softc *sc = t;
+	uint16_t v;
+	bus_size_t i;
+
+	enable_16(sc);
+#if 1
+	for (i = 0; i < c; i++) {
+		v = bus_space_read_2(sc->sc_iot, h, o);
+		d[i] = bswap16(v);
+	}
+#else
+	bus_space_read_multi_stream_2(sc->sc_iot, h, o, d, c);
+#endif
+	disable_16(sc);
+}
+
+void
+ata_bs_wm_2_s(void *t, bus_space_handle_t h, bus_size_t o,
+	const u_int16_t *d, bus_size_t c)
+{
+	struct ata_avila_softc *sc = t;
+	bus_size_t i;
+
+	enable_16(sc);
+#if 1
+	for (i = 0; i < c; i++)
+		bus_space_write_2(sc->sc_iot, h, o, bswap16(d[i]));
+#else
+	bus_space_write_multi_stream_2(sc->sc_iot, h, o, d, c);
+#endif
+	disable_16(sc);
+}
+
+static device_method_t ata_avila_methods[] = {
+	/* device interface */
+	DEVMETHOD(device_probe,             ata_avila_probe),
+	DEVMETHOD(device_attach,            ata_avila_attach),
+	DEVMETHOD(device_detach,            ata_avila_detach),
+	DEVMETHOD(device_shutdown,          bus_generic_shutdown),
+	DEVMETHOD(device_suspend,           bus_generic_suspend),
+	DEVMETHOD(device_resume,            bus_generic_resume),
+
+	/* bus methods */
+	DEVMETHOD(bus_alloc_resource,       ata_avila_alloc_resource),
+	DEVMETHOD(bus_release_resource,     ata_avila_release_resource),
+	DEVMETHOD(bus_activate_resource,    bus_generic_activate_resource),
+	DEVMETHOD(bus_deactivate_resource,  bus_generic_deactivate_resource),
+	DEVMETHOD(bus_setup_intr,           ata_avila_setup_intr),
+	DEVMETHOD(bus_teardown_intr,        ata_avila_teardown_intr),
+
+	{ 0, 0 }
+};
+
+devclass_t ata_avila_devclass;
+
+static driver_t ata_avila_driver = {
+	"ata_avila",
+	ata_avila_methods,
+	sizeof(struct ata_avila_softc),
+};
+
+DRIVER_MODULE(ata_avila, ixp, ata_avila_driver, ata_avila_devclass, 0, 0);
+MODULE_VERSION(ata_avila, 1);
+MODULE_DEPEND(ata_avila, ata, 1, 1, 1);
+
+static int
+avila_channel_probe(device_t dev)
+{
+	struct ata_channel *ch = device_get_softc(dev);
+
+	ch->unit = 0;
+	ch->flags |= ATA_USE_16BIT | ATA_NO_SLAVE;
+	device_set_desc_copy(dev, "ATA channel 0");
+
+	return ata_probe(dev);
+}
+
+static int
+avila_channel_attach(device_t dev)
+{
+	struct ata_avila_softc *sc = device_get_softc(device_get_parent(dev));
+	struct ata_channel *ch = device_get_softc(dev);
+	int i;
+
+	for (i = 0; i < ATA_MAX_RES; i++)
+		ch->r_io[i].res = &sc->sc_ata;
+
+	ch->r_io[ATA_DATA].offset = ATA_DATA;
+	ch->r_io[ATA_FEATURE].offset = ATA_FEATURE;
+	ch->r_io[ATA_COUNT].offset = ATA_COUNT;
+	ch->r_io[ATA_SECTOR].offset = ATA_SECTOR;
+	ch->r_io[ATA_CYL_LSB].offset = ATA_CYL_LSB;
+	ch->r_io[ATA_CYL_MSB].offset = ATA_CYL_MSB;
+	ch->r_io[ATA_DRIVE].offset = ATA_DRIVE;
+	ch->r_io[ATA_COMMAND].offset = ATA_COMMAND;
+	ch->r_io[ATA_ERROR].offset = ATA_FEATURE;
+	/* NB: should be used only for ATAPI devices */
+	ch->r_io[ATA_IREASON].offset = ATA_COUNT;
+	ch->r_io[ATA_STATUS].offset = ATA_COMMAND;
+	/* alias this; required by ata_generic_status */
+	ch->r_io[ATA_ALTSTAT].offset = ch->r_io[ATA_STATUS].offset;
+
+	/* NB: the control register is special */
+	ch->r_io[ATA_CONTROL].offset = AVILA_IDE_CTRL;
+
+	/* NB: by convention this points at the base of registers */
+	ch->r_io[ATA_IDX_ADDR].offset = 0;
+
+	ata_generic_hw(dev);
+	return ata_attach(dev);
+}
+
+/* XXX override ata_generic_reset to handle non-standard status */
+static void
+avila_channel_reset(device_t dev)
+{
+	struct ata_channel *ch = device_get_softc(dev);
+	u_int8_t ostat0 = 0, stat0 = 0;
+	u_int8_t err = 0, lsb = 0, msb = 0;
+	int mask = 0, timeout;
+
+	/* do we have any signs of ATA/ATAPI HW being present ? */
+	ATA_IDX_OUTB(ch, ATA_DRIVE, ATA_D_IBM | ATA_D_LBA | ATA_MASTER);
+	DELAY(10);
+	ostat0 = ATA_IDX_INB(ch, ATA_STATUS);
+	if ((ostat0 & 0xf8) != 0xf8 && ostat0 != 0xa5) {
+		stat0 = ATA_S_BUSY;
+		mask |= 0x01;
+	}
+
+	if (bootverbose)
+		device_printf(dev, "%s: reset tp1 mask=%02x ostat0=%02x\n",
+		    __func__, mask, ostat0);
+
+	/* if nothing showed up there is no need to get any further */
+	/* XXX SOS is that too strong?, we just might loose devices here */
+	ch->devices = 0;
+	if (!mask)
+		return;
+
+	/* reset (both) devices on this channel */
+	ATA_IDX_OUTB(ch, ATA_DRIVE, ATA_D_IBM | ATA_D_LBA | ATA_MASTER);
+	DELAY(10);
+	ATA_IDX_OUTB(ch, ATA_CONTROL, ATA_A_IDS | ATA_A_RESET);
+	ata_udelay(10000); 
+	ATA_IDX_OUTB(ch, ATA_CONTROL, ATA_A_IDS);
+	ata_udelay(100000);
+	ATA_IDX_INB(ch, ATA_ERROR);
+
+	/* wait for BUSY to go inactive */
+	for (timeout = 0; timeout < 310; timeout++) {
+		if ((mask & 0x01) && (stat0 & ATA_S_BUSY)) {
+			ATA_IDX_OUTB(ch, ATA_DRIVE, ATA_D_IBM | ATA_MASTER);
+			DELAY(10);
+			err = ATA_IDX_INB(ch, ATA_ERROR);
+			lsb = ATA_IDX_INB(ch, ATA_CYL_LSB);
+			msb = ATA_IDX_INB(ch, ATA_CYL_MSB);
+			stat0 = ATA_IDX_INB(ch, ATA_STATUS);
+			if (bootverbose)
+				device_printf(dev,
+				    "%s: stat0=0x%02x err=0x%02x lsb=0x%02x "
+				    "msb=0x%02x\n", __func__,
+				    stat0, err, lsb, msb);
+			if (stat0 == err && lsb == err && msb == err &&
+			    timeout > (stat0 & ATA_S_BUSY ? 100 : 10))
+				mask &= ~0x01;
+			if (!(stat0 & ATA_S_BUSY)) {
+				if ((err & 0x7f) == ATA_E_ILI || err == 0) {
+					if (lsb == ATAPI_MAGIC_LSB &&
+					    msb == ATAPI_MAGIC_MSB) {
+						ch->devices |= ATA_ATAPI_MASTER;
+					} else if (stat0 & ATA_S_READY) {
+						ch->devices |= ATA_ATA_MASTER;
+					}
+				} else if ((stat0 & 0x0f) &&
+				    err == lsb && err == msb) {
+					stat0 |= ATA_S_BUSY;
+				}
+			}
+		}
+		if (mask == 0x00)       /* nothing to wait for */
+			break;
+		/* wait for master */
+		if (!(stat0 & ATA_S_BUSY) || (stat0 == 0xff && timeout > 10))
+			break;
+		ata_udelay(100000);
+	}
+
+	if (bootverbose)
+		device_printf(dev, "%s: reset tp2 stat0=%02x devices=0x%b\n",
+		    __func__, stat0, ch->devices,
+		    "\20\4ATAPI_SLAVE\3ATAPI_MASTER\2ATA_SLAVE\1ATA_MASTER");
+}
+
+static device_method_t avila_channel_methods[] = {
+	/* device interface */
+	DEVMETHOD(device_probe,     avila_channel_probe),
+	DEVMETHOD(device_attach,    avila_channel_attach),
+	DEVMETHOD(device_detach,    ata_detach),
+	DEVMETHOD(device_shutdown,  bus_generic_shutdown),
+	DEVMETHOD(device_suspend,   ata_suspend),
+	DEVMETHOD(device_resume,    ata_resume),
+
+	DEVMETHOD(ata_reset,	    avila_channel_reset),
+
+	{ 0, 0 }
+};
+
+driver_t avila_channel_driver = {
+	"ata",
+	avila_channel_methods,
+	sizeof(struct ata_channel),
+};
+DRIVER_MODULE(ata, ata_avila, avila_channel_driver, ata_devclass, 0, 0);
diff --git a/sys/arm/xscale/ixp425/avila_machdep.c b/sys/arm/xscale/ixp425/avila_machdep.c
new file mode 100644
index 000000000000..b6efecf51576
--- /dev/null
+++ b/sys/arm/xscale/ixp425/avila_machdep.c
@@ -0,0 +1,545 @@
+/*	$NetBSD: hpc_machdep.c,v 1.70 2003/09/16 08:18:22 agc Exp $	*/
+
+/*-
+ * Copyright (c) 1994-1998 Mark Brinicombe.
+ * Copyright (c) 1994 Brini.
+ * All rights reserved.
+ *
+ * This code is derived from software written for Brini by Mark Brinicombe
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by Brini.
+ * 4. The name of the company nor the name of the author may be used to
+ *    endorse or promote products derived from this software without specific
+ *    prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * RiscBSD kernel project
+ *
+ * machdep.c
+ *
+ * Machine dependant functions for kernel setup
+ *
+ * This file needs a lot of work. 
+ *
+ * Created      : 17/09/94
+ */
+
+#include "opt_msgbuf.h"
+#include "opt_ddb.h"
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#define _ARM32_BUS_DMA_PRIVATE
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/sysproto.h>
+#include <sys/signalvar.h>
+#include <sys/imgact.h>
+#include <sys/kernel.h>
+#include <sys/ktr.h>
+#include <sys/linker.h>
+#include <sys/lock.h>
+#include <sys/malloc.h>
+#include <sys/mutex.h>
+#include <sys/pcpu.h>
+#include <sys/proc.h>
+#include <sys/ptrace.h>
+#include <sys/cons.h>
+#include <sys/bio.h>
+#include <sys/bus.h>
+#include <sys/buf.h>
+#include <sys/exec.h>
+#include <sys/kdb.h>
+#include <sys/msgbuf.h>
+#include <machine/reg.h>
+#include <machine/cpu.h>
+
+#include <vm/vm.h>
+#include <vm/pmap.h>
+#include <vm/vm.h>
+#include <vm/vm_object.h>
+#include <vm/vm_page.h>
+#include <vm/vm_pager.h>
+#include <vm/vm_map.h>
+#include <vm/vnode_pager.h>
+#include <machine/pmap.h>
+#include <machine/vmparam.h>
+#include <machine/pcb.h>
+#include <machine/undefined.h>
+#include <machine/machdep.h>
+#include <machine/metadata.h>
+#include <machine/armreg.h>
+#include <machine/bus.h>
+#include <sys/reboot.h>
+
+#include <arm/xscale/ixp425/ixp425reg.h>
+#include <arm/xscale/ixp425/ixp425var.h>
+
+#define KERNEL_PT_SYS		0	/* Page table for mapping proc0 zero page */
+#define	KERNEL_PT_IO		1
+#define KERNEL_PT_IO_NUM	3
+#define KERNEL_PT_BEFOREKERN	KERNEL_PT_IO + KERNEL_PT_IO_NUM
+#define KERNEL_PT_AFKERNEL	KERNEL_PT_BEFOREKERN + 1	/* L2 table for mapping after kernel */
+#define	KERNEL_PT_AFKERNEL_NUM	9
+
+/* this should be evenly divisable by PAGE_SIZE / L2_TABLE_SIZE_REAL (or 4) */
+#define NUM_KERNEL_PTS		(KERNEL_PT_AFKERNEL + KERNEL_PT_AFKERNEL_NUM)
+
+/* Define various stack sizes in pages */
+#define IRQ_STACK_SIZE	1
+#define ABT_STACK_SIZE	1
+#ifdef IPKDB
+#define UND_STACK_SIZE	2
+#else
+#define UND_STACK_SIZE	1
+#endif
+
+extern u_int data_abort_handler_address;
+extern u_int prefetch_abort_handler_address;
+extern u_int undefined_handler_address;
+
+struct pv_addr kernel_pt_table[NUM_KERNEL_PTS];
+
+extern void *_end;
+
+extern vm_offset_t sa1_cache_clean_addr;
+
+extern int *end;
+
+struct pcpu __pcpu;
+struct pcpu *pcpup = &__pcpu;
+
+/* Physical and virtual addresses for some global pages */
+
+vm_paddr_t phys_avail[10];
+vm_paddr_t dump_avail[4];
+vm_offset_t physical_pages;
+vm_offset_t clean_sva, clean_eva;
+
+struct pv_addr systempage;
+struct pv_addr msgbufpv;
+struct pv_addr irqstack;
+struct pv_addr undstack;
+struct pv_addr abtstack;
+struct pv_addr kernelstack;
+struct pv_addr minidataclean;
+
+static struct trapframe proc0_tf;
+
+/* Static device mappings. */
+static const struct pmap_devmap ixp425_devmap[] = {
+	/* Physical/Virtual address for I/O space */
+    {
+	IXP425_IO_VBASE,
+	IXP425_IO_HWBASE,
+	IXP425_IO_SIZE,
+	VM_PROT_READ|VM_PROT_WRITE,
+	PTE_NOCACHE,
+    },
+
+	/* Expansion Bus */
+    {
+	IXP425_EXP_VBASE,
+	IXP425_EXP_HWBASE,
+	IXP425_EXP_SIZE,
+	VM_PROT_READ|VM_PROT_WRITE,
+	PTE_NOCACHE,
+    },
+
+	/* IXP425 PCI Configuration */
+    {
+	IXP425_PCI_VBASE,
+	IXP425_PCI_HWBASE,
+	IXP425_PCI_SIZE,
+	VM_PROT_READ|VM_PROT_WRITE,
+	PTE_NOCACHE,
+    },
+
+	/* SDRAM Controller */
+    {
+	IXP425_MCU_VBASE,
+	IXP425_MCU_HWBASE,
+	IXP425_MCU_SIZE,
+	VM_PROT_READ|VM_PROT_WRITE,
+	PTE_NOCACHE,
+    },
+
+	/* PCI Memory Space */
+    {
+	IXP425_PCI_MEM_VBASE,
+	IXP425_PCI_MEM_HWBASE,
+	IXP425_PCI_MEM_SIZE,
+	VM_PROT_READ|VM_PROT_WRITE,
+	PTE_NOCACHE,
+    },
+	/* NPE-A Memory Space */
+    {
+	IXP425_NPE_A_VBASE,
+	IXP425_NPE_A_HWBASE,
+	IXP425_NPE_A_SIZE,
+	VM_PROT_READ|VM_PROT_WRITE,
+	PTE_NOCACHE,
+    },
+	/* NPE-B Memory Space */
+    {
+	IXP425_NPE_B_VBASE,
+	IXP425_NPE_B_HWBASE,
+	IXP425_NPE_B_SIZE,
+	VM_PROT_READ|VM_PROT_WRITE,
+	PTE_NOCACHE,
+    },
+	/* NPE-C Memory Space */
+    {
+	IXP425_NPE_C_VBASE,
+	IXP425_NPE_C_HWBASE,
+	IXP425_NPE_C_SIZE,
+	VM_PROT_READ|VM_PROT_WRITE,
+	PTE_NOCACHE,
+    },
+	/* MAC-A Memory Space */
+    {
+	IXP425_MAC_A_VBASE,
+	IXP425_MAC_A_HWBASE,
+	IXP425_MAC_A_SIZE,
+	VM_PROT_READ|VM_PROT_WRITE,
+	PTE_NOCACHE,
+    },
+	/* MAC-B Memory Space */
+    {
+	IXP425_MAC_B_VBASE,
+	IXP425_MAC_B_HWBASE,
+	IXP425_MAC_B_SIZE,
+	VM_PROT_READ|VM_PROT_WRITE,
+	PTE_NOCACHE,
+    },
+	/* Q-Mgr Memory Space */
+    {
+	IXP425_QMGR_VBASE,
+	IXP425_QMGR_HWBASE,
+	IXP425_QMGR_SIZE,
+	VM_PROT_READ|VM_PROT_WRITE,
+	PTE_NOCACHE,
+    },
+
+    {
+	0,
+	0,
+	0,
+	0,
+	0,
+    }
+};
+
+#define SDRAM_START 0x10000000
+
+#ifdef DDB
+extern vm_offset_t ksym_start, ksym_end;
+#endif
+
+extern vm_offset_t xscale_cache_clean_addr;
+
+void *
+initarm(void *arg, void *arg2)
+{
+	struct pv_addr  kernel_l1pt;
+	int loop;
+	u_int l1pagetable;
+	vm_offset_t freemempos;
+	vm_offset_t freemem_pt;
+	vm_offset_t afterkern;
+	vm_offset_t freemem_after;
+	vm_offset_t lastaddr;
+#ifdef DDB
+	vm_offset_t zstart = 0, zend = 0;
+#endif
+	int i = 0;
+	uint32_t fake_preload[35];
+	uint32_t memsize;
+
+	i = 0;
+
+	set_cpufuncs();
+	fake_preload[i++] = MODINFO_NAME;
+	fake_preload[i++] = strlen("elf kernel") + 1;
+	strcpy((char*)&fake_preload[i++], "elf kernel");
+	i += 2;
+	fake_preload[i++] = MODINFO_TYPE;
+	fake_preload[i++] = strlen("elf kernel") + 1;
+	strcpy((char*)&fake_preload[i++], "elf kernel");
+	i += 2;
+	fake_preload[i++] = MODINFO_ADDR;
+	fake_preload[i++] = sizeof(vm_offset_t);
+	fake_preload[i++] = KERNBASE + 0x00200000;
+	fake_preload[i++] = MODINFO_SIZE;
+	fake_preload[i++] = sizeof(uint32_t);
+	fake_preload[i++] = (uint32_t)&end - KERNBASE - 0x00200000;
+#ifdef DDB
+	if (*(uint32_t *)KERNVIRTADDR == MAGIC_TRAMP_NUMBER) {
+		fake_preload[i++] = MODINFO_METADATA|MODINFOMD_SSYM;
+		fake_preload[i++] = sizeof(vm_offset_t);
+		fake_preload[i++] = *(uint32_t *)(KERNVIRTADDR + 4);
+		fake_preload[i++] = MODINFO_METADATA|MODINFOMD_ESYM;
+		fake_preload[i++] = sizeof(vm_offset_t);
+		fake_preload[i++] = *(uint32_t *)(KERNVIRTADDR + 8);
+		lastaddr = *(uint32_t *)(KERNVIRTADDR + 8);
+		zend = lastaddr;
+		zstart = *(uint32_t *)(KERNVIRTADDR + 4);
+		ksym_start = zstart;
+		ksym_end = zend;
+	} else
+#endif
+		lastaddr = (vm_offset_t)&end;
+
+	fake_preload[i++] = 0;
+	fake_preload[i] = 0;
+	preload_metadata = (void *)fake_preload;
+
+
+	pcpu_init(pcpup, 0, sizeof(struct pcpu));
+	PCPU_SET(curthread, &thread0);
+
+#define KERNEL_TEXT_BASE (KERNBASE + 0x00200000)
+	freemempos = 0x10200000;
+	/* Define a macro to simplify memory allocation */
+#define	valloc_pages(var, np)			\
+	alloc_pages((var).pv_pa, (np));		\
+	(var).pv_va = (var).pv_pa + 0xb0000000;
+
+#define alloc_pages(var, np)			\
+	freemempos -= (np * PAGE_SIZE);		\
+	(var) = freemempos;		\
+	memset((char *)(var), 0, ((np) * PAGE_SIZE));
+
+	while (((freemempos - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) != 0)
+		freemempos -= PAGE_SIZE;
+	valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
+	for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
+		if (!(loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL))) {
+			valloc_pages(kernel_pt_table[loop],
+			    L2_TABLE_SIZE / PAGE_SIZE);
+		} else {
+			kernel_pt_table[loop].pv_pa = freemempos +
+			    (loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL)) *
+			    L2_TABLE_SIZE_REAL;
+			kernel_pt_table[loop].pv_va = 
+			    kernel_pt_table[loop].pv_pa + 0xb0000000;
+		}
+	}
+	freemem_pt = freemempos;
+	freemempos = 0x10100000;
+	/*
+	 * Allocate a page for the system page mapped to V0x00000000
+	 * This page will just contain the system vectors and can be
+	 * shared by all processes.
+	 */
+	valloc_pages(systempage, 1);
+
+	/* Allocate stacks for all modes */
+	valloc_pages(irqstack, IRQ_STACK_SIZE);
+	valloc_pages(abtstack, ABT_STACK_SIZE);
+	valloc_pages(undstack, UND_STACK_SIZE);
+	valloc_pages(kernelstack, KSTACK_PAGES);
+	alloc_pages(minidataclean.pv_pa, 1);
+	valloc_pages(msgbufpv, round_page(MSGBUF_SIZE) / PAGE_SIZE);
+#ifdef ARM_USE_SMALL_ALLOC
+	freemempos -= PAGE_SIZE;
+	freemem_pt = trunc_page(freemem_pt);
+	freemem_after = freemempos - ((freemem_pt - 0x10100000) /
+	    PAGE_SIZE) * sizeof(struct arm_small_page);
+	arm_add_smallalloc_pages((void *)(freemem_after + 0xb0000000)
+	    , (void *)0xc0100000, freemem_pt - 0x10100000, 1);
+	freemem_after -= ((freemem_after - 0x10001000) / PAGE_SIZE) *
+	    sizeof(struct arm_small_page);
+	arm_add_smallalloc_pages((void *)(freemem_after + 0xb0000000)
+	, (void *)0xc0001000, trunc_page(freemem_after) - 0x10001000, 0);
+	freemempos = trunc_page(freemem_after);
+	freemempos -= PAGE_SIZE;
+#endif
+	/*
+	 * Allocate memory for the l1 and l2 page tables. The scheme to avoid
+	 * wasting memory by allocating the l1pt on the first 16k memory was
+	 * taken from NetBSD rpc_machdep.c. NKPT should be greater than 12 for
+	 * this to work (which is supposed to be the case).
+	 */
+
+	/*
+	 * Now we start construction of the L1 page table
+	 * We start by mapping the L2 page tables into the L1.
+	 * This means that we can replace L1 mappings later on if necessary
+	 */
+	l1pagetable = kernel_l1pt.pv_va;
+
+	/* Map the L2 pages tables in the L1 page table */
+	pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00100000 - 1),
+	    &kernel_pt_table[KERNEL_PT_SYS]);
+	pmap_link_l2pt(l1pagetable, IXP425_IO_VBASE,
+	                &kernel_pt_table[KERNEL_PT_IO]);
+	pmap_link_l2pt(l1pagetable, IXP425_MCU_VBASE,
+	    		&kernel_pt_table[KERNEL_PT_IO + 1]);
+	pmap_link_l2pt(l1pagetable, IXP425_PCI_MEM_VBASE,
+	    		&kernel_pt_table[KERNEL_PT_IO + 2]);
+	pmap_link_l2pt(l1pagetable, KERNBASE,
+	    &kernel_pt_table[KERNEL_PT_BEFOREKERN]);
+	pmap_map_chunk(l1pagetable, KERNBASE, SDRAM_START, 0x100000,
+	    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
+	pmap_map_chunk(l1pagetable, KERNBASE + 0x100000, SDRAM_START + 0x100000,
+	    0x100000, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
+	pmap_map_chunk(l1pagetable, KERNBASE + 0x200000, SDRAM_START + 0x200000,
+	   (((uint32_t)(lastaddr) - KERNBASE - 0x200000) + L1_S_SIZE) & ~(L1_S_SIZE - 1),
+	    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
+	freemem_after = ((int)lastaddr + PAGE_SIZE) & ~(PAGE_SIZE - 1);
+	afterkern = round_page(((vm_offset_t)lastaddr + L1_S_SIZE) & ~(L1_S_SIZE 
+	    - 1));
+	for (i = 0; i < KERNEL_PT_AFKERNEL_NUM; i++) {
+		pmap_link_l2pt(l1pagetable, afterkern + i * 0x00100000,
+		    &kernel_pt_table[KERNEL_PT_AFKERNEL + i]);
+	}
+	pmap_map_entry(l1pagetable, afterkern, minidataclean.pv_pa, 
+	    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
+	
+
+#ifdef ARM_USE_SMALL_ALLOC
+	if ((freemem_after + 2 * PAGE_SIZE) <= afterkern) {
+		arm_add_smallalloc_pages((void *)(freemem_after),
+		    (void*)(freemem_after + PAGE_SIZE),
+		    afterkern - (freemem_after + PAGE_SIZE), 0);
+		    
+	}
+#endif
+
+	/* Map the Mini-Data cache clean area. */
+	xscale_setup_minidata(l1pagetable, afterkern,
+	    minidataclean.pv_pa);
+
+	/* Map the vector page. */
+	pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa,
+	    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
+	pmap_devmap_bootstrap(l1pagetable, ixp425_devmap);
+	/*
+	 * Give the XScale global cache clean code an appropriately
+	 * sized chunk of unmapped VA space starting at 0xff000000
+	 * (our device mappings end before this address).
+	 */
+	xscale_cache_clean_addr = 0xff000000U;
+
+	cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
+	setttb(kernel_l1pt.pv_pa);
+	cpu_tlb_flushID();
+	cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
+	/*
+	 * Pages were allocated during the secondary bootstrap for the
+	 * stacks for different CPU modes.
+	 * We must now set the r13 registers in the different CPU modes to
+	 * point to these stacks.
+	 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
+	 * of the stack memory.
+	 */
+
+				   
+	set_stackptr(PSR_IRQ32_MODE,
+	    irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
+	set_stackptr(PSR_ABT32_MODE,
+	    abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
+	set_stackptr(PSR_UND32_MODE,
+	    undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);
+
+
+
+	/*
+	 * We must now clean the cache again....
+	 * Cleaning may be done by reading new data to displace any
+	 * dirty data in the cache. This will have happened in setttb()
+	 * but since we are boot strapping the addresses used for the read
+	 * may have just been remapped and thus the cache could be out
+	 * of sync. A re-clean after the switch will cure this.
+	 * After booting there are no gross reloations of the kernel thus
+	 * this problem will not occur after initarm().
+	 */
+	cpu_idcache_wbinv_all();
+	/*
+	 * Fetch the SDRAM start/size from the ixp425 SDRAM configration
+	 * registers.
+	 */
+	cninit();
+	memsize = ixp425_sdram_size();
+	physmem = memsize / PAGE_SIZE;
+
+	/* Set stack for exception handlers */
+	
+	data_abort_handler_address = (u_int)data_abort_handler;
+	prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
+	undefined_handler_address = (u_int)undefinedinstruction_bounce;
+	undefined_init();
+				
+#ifdef KSE
+	proc_linkup(&proc0, &ksegrp0, &thread0);
+#else
+	proc_linkup(&proc0, &thread0);
+#endif
+	thread0.td_kstack = kernelstack.pv_va;
+	thread0.td_pcb = (struct pcb *)
+		(thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1;
+	thread0.td_pcb->pcb_flags = 0;
+	thread0.td_frame = &proc0_tf;
+	pcpup->pc_curpcb = thread0.td_pcb;
+	
+	/* Enable MMU, I-cache, D-cache, write buffer. */
+
+	arm_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);
+
+
+
+	pmap_curmaxkvaddr = afterkern + PAGE_SIZE;
+	dump_avail[0] = 0x10000000;
+	dump_avail[1] = 0x10000000 + memsize;
+	dump_avail[2] = 0;
+	dump_avail[3] = 0;
+					
+	pmap_bootstrap(pmap_curmaxkvaddr, 
+	    0xd0000000, &kernel_l1pt);
+	msgbufp = (void*)msgbufpv.pv_va;
+	msgbufinit(msgbufp, MSGBUF_SIZE);
+	mutex_init();
+	
+	i = 0;
+#ifdef ARM_USE_SMALL_ALLOC
+	phys_avail[i++] = 0x10000000;
+	phys_avail[i++] = 0x10001000; 	/*
+					 *XXX: Gross hack to get our
+					 * pages in the vm_page_array
+					 . */
+#endif
+	phys_avail[i++] = round_page(virtual_avail - KERNBASE + SDRAM_START);
+	phys_avail[i++] = trunc_page(0x10000000 + memsize - 1);
+	phys_avail[i++] = 0;
+	phys_avail[i] = 0;
+	
+	/* Do basic tuning, hz etc */
+	init_param1();
+	init_param2(physmem);
+	kdb_init();
+	return ((void *)(kernelstack.pv_va + USPACE_SVC_STACK_TOP -
+	    sizeof(struct pcb)));
+}
diff --git a/sys/arm/xscale/ixp425/files.avila b/sys/arm/xscale/ixp425/files.avila
new file mode 100644
index 000000000000..f5f2dbce95b4
--- /dev/null
+++ b/sys/arm/xscale/ixp425/files.avila
@@ -0,0 +1,4 @@
+#$FreeBSD$
+arm/xscale/ixp425/avila_machdep.c	standard
+arm/xscale/ixp425/avila_ata.c		optional avila_ata
+arm/xscale/ixp425/ixdp425_pci.c		optional pci
diff --git a/sys/arm/xscale/ixp425/files.ixp425 b/sys/arm/xscale/ixp425/files.ixp425
new file mode 100644
index 000000000000..9304b7c6d330
--- /dev/null
+++ b/sys/arm/xscale/ixp425/files.ixp425
@@ -0,0 +1,41 @@
+#$FreeBSD$
+arm/arm/cpufunc_asm_xscale.S		standard
+arm/arm/irq_dispatch.S			standard
+arm/xscale/ixp425/ixp425.c		standard
+arm/xscale/ixp425/ixp425_mem.c		standard
+arm/xscale/ixp425/ixp425_space.c	standard
+arm/xscale/ixp425/ixp425_timer.c	standard
+arm/xscale/ixp425/ixp425_wdog.c		optional	ixpwdog
+arm/xscale/ixp425/ixp425_iic.c		optional	ixpiic
+arm/xscale/ixp425/ixp425_pci.c		optional	pci
+arm/xscale/ixp425/ixp425_pci_asm.S	optional	pci
+arm/xscale/ixp425/ixp425_pci_space.c	optional	pci
+arm/xscale/ixp425/uart_cpu_ixp425.c	optional	uart
+arm/xscale/ixp425/uart_bus_ixp425.c	optional	uart
+arm/xscale/ixp425/ixp425_a4x_space.c	optional	uart
+arm/xscale/ixp425/ixp425_a4x_io.S	optional	uart
+dev/uart/uart_dev_ns8250.c		optional	uart
+#
+# NPE-based Ethernet support (requires qmgr also).  Note the
+# firmware images must be downloaded from the Intel web site.
+#
+arm/xscale/ixp425/if_npe.c		optional npe
+arm/xscale/ixp425/ixp425_npe.c		optional npe
+ixp425_npe_fw.c				optional npe_fw			\
+	compile-with	"${AWK} -f $S/tools/fw_stub.awk IxNpeMicrocode.dat:npe_fw -mnpe -c${.TARGET}" \
+	no-implicit-rule before-depend local				\
+	clean		"ixp425_npe_fw.c"
+#
+# NB: ld encodes the path in the binary symbols generated for the
+#     firmware image so link the file to the object directory to
+#     get known values for reference in the _fw.c file.
+#
+IxNpeMicrocode.fwo			optional npe_fw			\
+	dependency	"$S/arm/xscale/ixp425/IxNpeMicrocode.dat"	\
+	compile-with	"ln -sf $S/arm/xscale/ixp425/IxNpeMicrocode.dat ${.OBJDIR}; ${LD} -b binary -d -warn-common -r -d -o ${.TARGET} IxNpeMicrocode.dat" \
+	no-implicit-rule						\
+	clean		"IxNpeMicrocode.dat IxNpeMicrocode.fwo"
+#
+# Q-Manager support
+#
+arm/xscale/ixp425/ixp425_qmgr.c		optional qmgr
diff --git a/sys/arm/xscale/ixp425/if_npe.c b/sys/arm/xscale/ixp425/if_npe.c
new file mode 100644
index 000000000000..c63fc986093b
--- /dev/null
+++ b/sys/arm/xscale/ixp425/if_npe.c
@@ -0,0 +1,1673 @@
+/*-
+ * Copyright (c) 2006 Sam Leffler.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+/*
+ * Intel XScale NPE Ethernet driver.
+ *
+ * This driver handles the two ports present on the IXP425.
+ * Packet processing is done by the Network Processing Engines
+ * (NPE's) that work together with a MAC and PHY. The MAC
+ * is also mapped to the XScale cpu; the PHY is accessed via
+ * the MAC. NPE-XScale communication happens through h/w
+ * queues managed by the Q Manager block.
+ *
+ * The code here replaces the ethAcc, ethMii, and ethDB classes
+ * in the Intel Access Library (IAL) and the OS-specific driver.
+ *
+ * XXX add vlan support
+ * XXX NPE-C port doesn't work yet
+ */
+#ifdef HAVE_KERNEL_OPTION_HEADERS
+#include "opt_device_polling.h"
+#endif
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/kernel.h>
+#include <sys/mbuf.h>
+#include <sys/malloc.h>
+#include <sys/module.h>
+#include <sys/rman.h>
+#include <sys/socket.h>
+#include <sys/sockio.h>
+#include <sys/sysctl.h>
+#include <sys/endian.h>
+#include <machine/bus.h>
+
+#include <net/ethernet.h>
+#include <net/if.h>
+#include <net/if_arp.h>
+#include <net/if_dl.h>
+#include <net/if_media.h>
+#include <net/if_mib.h>
+#include <net/if_types.h>
+
+#ifdef INET
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/in_var.h>
+#include <netinet/ip.h>
+#endif
+
+#include <net/bpf.h>
+#include <net/bpfdesc.h>
+
+#include <arm/xscale/ixp425/ixp425reg.h>
+#include <arm/xscale/ixp425/ixp425var.h>
+#include <arm/xscale/ixp425/ixp425_qmgr.h>
+#include <arm/xscale/ixp425/ixp425_npevar.h>
+
+#include <dev/mii/mii.h>
+#include <dev/mii/miivar.h>
+#include <arm/xscale/ixp425/if_npereg.h>
+
+#include "miibus_if.h"
+
+struct npebuf {
+	struct npebuf	*ix_next;	/* chain to next buffer */
+	void		*ix_m;		/* backpointer to mbuf */
+	bus_dmamap_t	ix_map;		/* bus dma map for associated data */
+	struct npehwbuf	*ix_hw;		/* associated h/w block */
+	uint32_t	ix_neaddr;	/* phys address of ix_hw */
+};
+
+struct npedma {
+	const char*	name;
+	int		nbuf;		/* # npebuf's allocated */
+	bus_dma_tag_t	mtag;		/* bus dma tag for mbuf data */
+	struct npehwbuf	*hwbuf;		/* NPE h/w buffers */
+	bus_dma_tag_t	buf_tag;	/* tag+map for NPE buffers */
+	bus_dmamap_t	buf_map;
+	bus_addr_t	buf_phys;	/* phys addr of buffers */
+	struct npebuf	*buf;		/* s/w buffers (1-1 w/ h/w) */
+};
+
+struct npe_softc {
+	/* XXX mii requires this be first; do not move! */
+	struct ifnet	*sc_ifp;	/* ifnet pointer */
+	struct mtx	sc_mtx;		/* basically a perimeter lock */
+	device_t	sc_dev;
+	bus_space_tag_t	sc_iot;		
+	bus_space_handle_t sc_ioh;	/* MAC register window */
+	device_t	sc_mii;		/* child miibus */
+	bus_space_handle_t sc_miih;	/* MII register window */
+	struct ixpnpe_softc *sc_npe;	/* NPE support */
+	int		sc_debug;	/* DPRINTF* control */
+	int		sc_tickinterval;
+	struct callout	tick_ch;	/* Tick callout */
+	struct npedma	txdma;
+	struct npebuf	*tx_free;	/* list of free tx buffers */
+	struct npedma	rxdma;
+	bus_addr_t	buf_phys;	/* XXX for returning a value */
+	int		rx_qid;		/* rx qid */
+	int		rx_freeqid;	/* rx free buffers qid */
+	int		tx_qid;		/* tx qid */
+	int		tx_doneqid;	/* tx completed qid */
+	struct ifmib_iso_8802_3 mibdata;
+	bus_dma_tag_t	sc_stats_tag;	/* bus dma tag for stats block */
+	struct npestats	*sc_stats;
+	bus_dmamap_t	sc_stats_map;
+	bus_addr_t	sc_stats_phys;	/* phys addr of sc_stats */
+};
+
+/*
+ * Per-unit static configuration for IXP425.  The tx and
+ * rx free Q id's are fixed by the NPE microcode.  The
+ * rx Q id's are programmed to be separate to simplify
+ * multi-port processing.  It may be better to handle
+ * all traffic through one Q (as done by the Intel drivers).
+ *
+ * Note that the PHY's are accessible only from MAC A
+ * on the IXP425.  This and other platform-specific
+ * assumptions probably need to be handled through hints.
+ */
+static const struct {
+	const char	*desc;		/* device description */
+	int		npeid;		/* NPE assignment */
+	uint32_t	imageid;	/* NPE firmware image id */
+	uint32_t	regbase;
+	int		regsize;
+	uint32_t	miibase;
+	int		miisize;
+	uint8_t		rx_qid;
+	uint8_t		rx_freeqid;
+	uint8_t		tx_qid;
+	uint8_t		tx_doneqid;
+} npeconfig[NPE_PORTS_MAX] = {
+	{ .desc		= "IXP NPE-B",
+	  .npeid	= NPE_B,
+	  .imageid	= IXP425_NPE_B_IMAGEID,
+	  .regbase	= IXP425_MAC_A_HWBASE,
+	  .regsize	= IXP425_MAC_A_SIZE,
+	  .miibase	= IXP425_MAC_A_HWBASE,
+	  .miisize	= IXP425_MAC_A_SIZE,
+	  .rx_qid	= 4,
+	  .rx_freeqid	= 27,
+	  .tx_qid	= 24,
+	  .tx_doneqid	= 31
+	},
+	{ .desc		= "IXP NPE-C",
+	  .npeid	= NPE_C,
+	  .imageid	= IXP425_NPE_C_IMAGEID,
+	  .regbase	= IXP425_MAC_B_HWBASE,
+	  .regsize	= IXP425_MAC_B_SIZE,
+	  .miibase	= IXP425_MAC_A_HWBASE,
+	  .miisize	= IXP425_MAC_A_SIZE,
+	  .rx_qid	= 12,
+	  .rx_freeqid	= 28,
+	  .tx_qid	= 25,
+	  .tx_doneqid	= 31
+	},
+};
+static struct npe_softc *npes[NPE_MAX];	/* NB: indexed by npeid */
+
+static __inline uint32_t
+RD4(struct npe_softc *sc, bus_size_t off)
+{
+	return bus_space_read_4(sc->sc_iot, sc->sc_ioh, off);
+}
+
+static __inline void
+WR4(struct npe_softc *sc, bus_size_t off, uint32_t val)
+{
+	bus_space_write_4(sc->sc_iot, sc->sc_ioh, off, val);
+}
+
+#define NPE_LOCK(_sc)		mtx_lock(&(_sc)->sc_mtx)
+#define	NPE_UNLOCK(_sc)		mtx_unlock(&(_sc)->sc_mtx)
+#define NPE_LOCK_INIT(_sc) \
+	mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->sc_dev), \
+	    MTX_NETWORK_LOCK, MTX_DEF)
+#define NPE_LOCK_DESTROY(_sc)	mtx_destroy(&_sc->sc_mtx);
+#define NPE_ASSERT_LOCKED(_sc)	mtx_assert(&_sc->sc_mtx, MA_OWNED);
+#define NPE_ASSERT_UNLOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_NOTOWNED);
+
+static devclass_t npe_devclass;
+
+static int	npe_activate(device_t dev);
+static void	npe_deactivate(device_t dev);
+static int	npe_ifmedia_update(struct ifnet *ifp);
+static void	npe_ifmedia_status(struct ifnet *ifp, struct ifmediareq *ifmr);
+static void	npe_setmac(struct npe_softc *sc, u_char *eaddr);
+static void	npe_getmac(struct npe_softc *sc, u_char *eaddr);
+static void	npe_txdone(int qid, void *arg);
+static int	npe_rxbuf_init(struct npe_softc *, struct npebuf *,
+			struct mbuf *);
+static void	npe_rxdone(int qid, void *arg);
+static void	npeinit(void *);
+static void	npestart_locked(struct ifnet *);
+static void	npestart(struct ifnet *);
+static void	npestop(struct npe_softc *);
+static void	npewatchdog(struct ifnet *);
+static int	npeioctl(struct ifnet * ifp, u_long, caddr_t);
+
+static int	npe_setrxqosentry(struct npe_softc *, int classix,
+			int trafclass, int qid);
+static int	npe_updatestats(struct npe_softc *);
+#if 0
+static int	npe_getstats(struct npe_softc *);
+static uint32_t	npe_getimageid(struct npe_softc *);
+static int	npe_setloopback(struct npe_softc *, int ena);
+#endif
+
+/* NB: all tx done processing goes through one queue */
+static int tx_doneqid = -1;
+
+SYSCTL_NODE(_hw, OID_AUTO, npe, CTLFLAG_RD, 0, "IXP425 NPE driver parameters");
+
+static int npe_debug = 0;
+SYSCTL_INT(_hw_npe, OID_AUTO, debug, CTLFLAG_RW, &npe_debug,
+	   0, "IXP425 NPE network interface debug msgs");
+TUNABLE_INT("hw.npe.npe", &npe_debug);
+#define	DPRINTF(sc, fmt, ...) do {					\
+	if (sc->sc_debug) device_printf(sc->sc_dev, fmt, __VA_ARGS__);	\
+} while (0)
+#define	DPRINTFn(n, sc, fmt, ...) do {					\
+	if (sc->sc_debug >= n) device_printf(sc->sc_dev, fmt, __VA_ARGS__);\
+} while (0)
+static int npe_tickinterval = 3;		/* npe_tick frequency (secs) */
+SYSCTL_INT(_hw_npe, OID_AUTO, tickinterval, CTLFLAG_RD, &npe_tickinterval,
+	    0, "periodic work interval (secs)");
+TUNABLE_INT("hw.npe.tickinterval", &npe_tickinterval);
+
+static	int npe_rxbuf = 64;		/* # rx buffers to allocate */
+SYSCTL_INT(_hw_npe, OID_AUTO, rxbuf, CTLFLAG_RD, &npe_rxbuf,
+	    0, "rx buffers allocated");
+TUNABLE_INT("hw.npe.rxbuf", &npe_rxbuf);
+static	int npe_txbuf = 128;		/* # tx buffers to allocate */
+SYSCTL_INT(_hw_npe, OID_AUTO, txbuf, CTLFLAG_RD, &npe_txbuf,
+	    0, "tx buffers allocated");
+TUNABLE_INT("hw.npe.txbuf", &npe_txbuf);
+
+static int
+npe_probe(device_t dev)
+{
+	int unit = device_get_unit(dev);
+
+	if (unit >= NPE_PORTS_MAX) {
+		device_printf(dev, "unit %d not supported\n", unit);
+		return EINVAL;
+	}
+	/* XXX check feature register to see if enabled */
+	device_set_desc(dev, npeconfig[unit].desc);
+	return 0;
+}
+
+static int
+npe_attach(device_t dev)
+{
+	struct npe_softc *sc = device_get_softc(dev);
+	struct ixp425_softc *sa = device_get_softc(device_get_parent(dev));
+	struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(dev);
+	struct sysctl_oid *tree = device_get_sysctl_tree(dev);
+	struct ifnet *ifp = NULL;
+	int error;
+	u_char eaddr[6];
+
+	sc->sc_dev = dev;
+	sc->sc_iot = sa->sc_iot;
+	NPE_LOCK_INIT(sc);
+	callout_init_mtx(&sc->tick_ch, &sc->sc_mtx, 0);
+	sc->sc_debug = npe_debug;
+	sc->sc_tickinterval = npe_tickinterval;
+
+	sc->sc_npe = ixpnpe_attach(dev);
+	if (sc->sc_npe == NULL) {
+		error = EIO;		/* XXX */
+		goto out;
+	}
+
+	error = npe_activate(dev);
+	if (error)
+		goto out;
+
+	npe_getmac(sc, eaddr);
+
+	/* NB: must be setup prior to invoking mii code */
+	sc->sc_ifp = ifp = if_alloc(IFT_ETHER);
+	if (mii_phy_probe(dev, &sc->sc_mii, npe_ifmedia_update, npe_ifmedia_status)) {
+		device_printf(dev, "Cannot find my PHY.\n");
+		error = ENXIO;
+		goto out;
+	}
+
+	ifp->if_softc = sc;
+	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
+	ifp->if_mtu = ETHERMTU;
+	ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
+	ifp->if_start = npestart;
+	ifp->if_ioctl = npeioctl;
+	ifp->if_watchdog = npewatchdog;
+	ifp->if_init = npeinit;
+	IFQ_SET_MAXLEN(&ifp->if_snd, sc->txdma.nbuf - 1);
+	ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
+	IFQ_SET_READY(&ifp->if_snd);
+	ifp->if_timer = 0;
+	ifp->if_linkmib = &sc->mibdata;
+	ifp->if_linkmiblen = sizeof(sc->mibdata);
+	sc->mibdata.dot3Compliance = DOT3COMPLIANCE_STATS;
+#ifdef DEVICE_POLLING
+	ifp->if_capabilities |= IFCAP_POLLING;
+#endif
+
+	SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "debug",
+	    CTLFLAG_RW, &sc->sc_debug, 0, "control debugging printfs");
+	SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "tickinterval",
+	    CTLFLAG_RW, &sc->sc_tickinterval, 0, "periodic work frequency");
+
+	ether_ifattach(ifp, eaddr);
+	return 0;
+out:
+	npe_deactivate(dev);
+	if (ifp != NULL)
+		if_free(ifp);
+	return error;
+}
+
+static int
+npe_detach(device_t dev)
+{
+	struct npe_softc *sc = device_get_softc(dev);
+	struct ifnet *ifp = sc->sc_ifp;
+
+#ifdef DEVICE_POLLING
+	if (ifp->if_capenable & IFCAP_POLLING)
+		ether_poll_deregister(ifp);
+#endif
+	npestop(sc);
+	if (ifp != NULL) {
+		ether_ifdetach(ifp);
+		if_free(ifp);
+	}
+	NPE_LOCK_DESTROY(sc);
+	npe_deactivate(dev);
+	if (sc->sc_npe != NULL)
+		ixpnpe_detach(sc->sc_npe);
+	return 0;
+}
+
+/*
+ * Compute and install the multicast filter.
+ */
+static void
+npe_setmcast(struct npe_softc *sc)
+{
+	struct ifnet *ifp = sc->sc_ifp;
+	uint8_t mask[ETHER_ADDR_LEN], addr[ETHER_ADDR_LEN];
+	int i;
+
+	if (ifp->if_flags & IFF_PROMISC) {
+		memset(mask, 0, ETHER_ADDR_LEN);
+		memset(addr, 0, ETHER_ADDR_LEN);
+	} else if (ifp->if_flags & IFF_ALLMULTI) {
+		static const uint8_t allmulti[ETHER_ADDR_LEN] =
+		    { 0x01, 0x00, 0x00, 0x00, 0x00, 0x00 };
+		memcpy(mask, allmulti, ETHER_ADDR_LEN);
+		memcpy(addr, allmulti, ETHER_ADDR_LEN);
+	} else {
+		uint8_t clr[ETHER_ADDR_LEN], set[ETHER_ADDR_LEN];
+		struct ifmultiaddr *ifma;
+		const uint8_t *mac;
+
+		memset(clr, 0, ETHER_ADDR_LEN);
+		memset(set, 0xff, ETHER_ADDR_LEN);
+
+		IF_ADDR_LOCK(ifp);
+		TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
+			if (ifma->ifma_addr->sa_family != AF_LINK)
+				continue;
+			mac = LLADDR((struct sockaddr_dl *) ifma->ifma_addr);
+			for (i = 0; i < ETHER_ADDR_LEN; i++) {
+				clr[i] |= mac[i];
+				set[i] &= mac[i];
+			}
+		}
+		IF_ADDR_UNLOCK(ifp);
+
+		for (i = 0; i < ETHER_ADDR_LEN; i++) {
+			mask[i] = set[i] | ~clr[i];
+			addr[i] = set[i];
+		}
+	}
+
+	/*
+	 * Write the mask and address registers.
+	 */
+	for (i = 0; i < ETHER_ADDR_LEN; i++) {
+		WR4(sc, NPE_MAC_ADDR_MASK(i), mask[i]);
+		WR4(sc, NPE_MAC_ADDR(i), addr[i]);
+	}
+}
+
+static void
+npe_getaddr(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
+{
+	struct npe_softc *sc;
+
+	if (error != 0)
+		return;
+	sc = (struct npe_softc *)arg;
+	sc->buf_phys = segs[0].ds_addr;
+}
+
+static int
+npe_dma_setup(struct npe_softc *sc, struct npedma *dma,
+	const char *name, int nbuf, int maxseg)
+{
+	int error, i;
+
+	memset(dma, 0, sizeof(dma));
+
+	dma->name = name;
+	dma->nbuf = nbuf;
+
+	/* DMA tag for mapped mbufs  */
+	error = bus_dma_tag_create(NULL, 1, 0,
+	    BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
+	    MCLBYTES, maxseg, MCLBYTES, 0,
+	    busdma_lock_mutex, &sc->sc_mtx, &dma->mtag);
+	if (error != 0) {
+		device_printf(sc->sc_dev, "unable to create %s mbuf dma tag, "
+		     "error %u\n", dma->name, error);
+		return error;
+	}
+
+	/* DMA tag and map for the NPE buffers */
+	error = bus_dma_tag_create(NULL, sizeof(uint32_t), 0, 
+	    BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
+	    nbuf * sizeof(struct npehwbuf), 1,
+	    nbuf * sizeof(struct npehwbuf), 0,
+	    busdma_lock_mutex, &sc->sc_mtx, &dma->buf_tag);
+	if (error != 0) {
+		device_printf(sc->sc_dev,
+		    "unable to create %s npebuf dma tag, error %u\n",
+		    dma->name, error);
+		return error;
+	}
+	/* XXX COHERENT for now */
+	if (bus_dmamem_alloc(dma->buf_tag, (void **)&dma->hwbuf,
+	    BUS_DMA_NOWAIT | BUS_DMA_ZERO | BUS_DMA_COHERENT,
+	    &dma->buf_map) != 0) {
+		device_printf(sc->sc_dev,
+		     "unable to allocate memory for %s h/w buffers, error %u\n",
+		     dma->name, error);
+		return error;
+	}
+	/* XXX M_TEMP */
+	dma->buf = malloc(nbuf * sizeof(struct npebuf), M_TEMP, M_NOWAIT | M_ZERO);
+	if (dma->buf == NULL) {
+		device_printf(sc->sc_dev,
+		     "unable to allocate memory for %s s/w buffers\n",
+		     dma->name);
+		return error;
+	}
+	if (bus_dmamap_load(dma->buf_tag, dma->buf_map,
+	    dma->hwbuf, nbuf*sizeof(struct npehwbuf), npe_getaddr, sc, 0) != 0) {
+		device_printf(sc->sc_dev,
+		     "unable to map memory for %s h/w buffers, error %u\n",
+		     dma->name, error);
+		return error;
+	}
+	dma->buf_phys = sc->buf_phys;
+	for (i = 0; i < dma->nbuf; i++) {
+		struct npebuf *npe = &dma->buf[i];
+		struct npehwbuf *hw = &dma->hwbuf[i];
+
+		/* calculate offset to shared area */
+		npe->ix_neaddr = dma->buf_phys +
+			((uintptr_t)hw - (uintptr_t)dma->hwbuf);
+		KASSERT((npe->ix_neaddr & 0x1f) == 0,
+		    ("ixpbuf misaligned, PA 0x%x", npe->ix_neaddr));
+		error = bus_dmamap_create(dma->mtag, BUS_DMA_NOWAIT,
+				&npe->ix_map);
+		if (error != 0) {
+			device_printf(sc->sc_dev,
+			     "unable to create dmamap for %s buffer %u, "
+			     "error %u\n", dma->name, i, error);
+			return error;
+		}
+		npe->ix_hw = hw;
+	}
+	bus_dmamap_sync(dma->buf_tag, dma->buf_map, BUS_DMASYNC_PREWRITE);
+	return 0;
+}
+
+static void
+npe_dma_destroy(struct npe_softc *sc, struct npedma *dma)
+{
+	int i;
+
+	if (dma->hwbuf != NULL) {
+		for (i = 0; i < dma->nbuf; i++) {
+			struct npebuf *npe = &dma->buf[i];
+			bus_dmamap_destroy(dma->mtag, npe->ix_map);
+		}
+		bus_dmamap_unload(dma->buf_tag, dma->buf_map);
+		bus_dmamem_free(dma->buf_tag, dma->hwbuf, dma->buf_map);
+		bus_dmamap_destroy(dma->buf_tag, dma->buf_map);
+	}
+	if (dma->buf != NULL)
+		free(dma->buf, M_TEMP);
+	if (dma->buf_tag)
+		bus_dma_tag_destroy(dma->buf_tag);
+	if (dma->mtag)
+		bus_dma_tag_destroy(dma->mtag);
+	memset(dma, 0, sizeof(*dma));
+}
+
+static int
+npe_activate(device_t dev)
+{
+	struct npe_softc * sc = device_get_softc(dev);
+	int unit = device_get_unit(dev);
+	int error, i;
+
+	/* load NPE firmware and start it running */
+	error = ixpnpe_init(sc->sc_npe, "npe_fw", npeconfig[unit].imageid);
+	if (error != 0)
+		return error;
+
+	if (bus_space_map(sc->sc_iot, npeconfig[unit].regbase,
+	    npeconfig[unit].regsize, 0, &sc->sc_ioh)) {
+		device_printf(dev, "Cannot map registers 0x%x:0x%x\n",
+		    npeconfig[unit].regbase, npeconfig[unit].regsize);
+		return ENOMEM;
+	}
+
+	if (npeconfig[unit].miibase != npeconfig[unit].regbase) {
+		/*
+		 * The PHY's are only accessible from one MAC (it appears)
+		 * so for other MAC's setup an additional mapping for
+		 * frobbing the PHY registers.
+		 */
+		if (bus_space_map(sc->sc_iot, npeconfig[unit].miibase,
+		    npeconfig[unit].miisize, 0, &sc->sc_miih)) {
+			device_printf(dev,
+			    "Cannot map MII registers 0x%x:0x%x\n",
+			    npeconfig[unit].miibase, npeconfig[unit].miisize);
+			return ENOMEM;
+		}
+	} else
+		sc->sc_miih = sc->sc_ioh;
+	error = npe_dma_setup(sc, &sc->txdma, "tx", npe_txbuf, NPE_MAXSEG);
+	if (error != 0)
+		return error;
+	error = npe_dma_setup(sc, &sc->rxdma, "rx", npe_rxbuf, 1);
+	if (error != 0)
+		return error;
+
+	/* setup statistics block */
+	error = bus_dma_tag_create(NULL, sizeof(uint32_t), 0,
+	    BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
+	    sizeof(struct npestats), 1, sizeof(struct npestats), 0,
+	    busdma_lock_mutex, &sc->sc_mtx, &sc->sc_stats_tag);
+	if (error != 0) {
+		device_printf(sc->sc_dev, "unable to create stats tag, "
+		     "error %u\n", error);
+		return error;
+	}
+	if (bus_dmamem_alloc(sc->sc_stats_tag, (void **)&sc->sc_stats,
+	    BUS_DMA_NOWAIT, &sc->sc_stats_map) != 0) {
+		device_printf(sc->sc_dev,
+		     "unable to allocate memory for stats block, error %u\n",
+		     error);
+		return error;
+	}
+	if (bus_dmamap_load(sc->sc_stats_tag, sc->sc_stats_map,
+	    sc->sc_stats, sizeof(struct npestats), npe_getaddr, sc, 0) != 0) {
+		device_printf(sc->sc_dev,
+		     "unable to load memory for stats block, error %u\n",
+		     error);
+		return error;
+	}
+	sc->sc_stats_phys = sc->buf_phys;
+
+	/* XXX disable half-bridge LEARNING+FILTERING feature */
+
+	/*
+	 * Setup h/w rx/tx queues.  There are four q's:
+	 *   rx		inbound q of rx'd frames
+	 *   rx_free	pool of ixpbuf's for receiving frames
+	 *   tx		outbound q of frames to send
+	 *   tx_done	q of tx frames that have been processed
+	 *
+	 * The NPE handles the actual tx/rx process and the q manager
+	 * handles the queues.  The driver just writes entries to the
+	 * q manager mailbox's and gets callbacks when there are rx'd
+	 * frames to process or tx'd frames to reap.  These callbacks
+	 * are controlled by the q configurations; e.g. we get a
+	 * callback when tx_done has 2 or more frames to process and
+	 * when the rx q has at least one frame.  These setings can
+	 * changed at the time the q is configured.
+	 */
+	sc->rx_qid = npeconfig[unit].rx_qid;
+	ixpqmgr_qconfig(sc->rx_qid, npe_rxbuf, 0,  1,
+		IX_QMGR_Q_SOURCE_ID_NOT_E, npe_rxdone, sc);
+	sc->rx_freeqid = npeconfig[unit].rx_freeqid;
+	ixpqmgr_qconfig(sc->rx_freeqid,	npe_rxbuf, 0, npe_rxbuf/2, 0, NULL, sc);
+	/* tell the NPE to direct all traffic to rx_qid */
+#if 0
+	for (i = 0; i < 8; i++)
+#else
+device_printf(sc->sc_dev, "remember to fix rx q setup\n");
+	for (i = 0; i < 4; i++)
+#endif
+		npe_setrxqosentry(sc, i, 0, sc->rx_qid);
+
+	sc->tx_qid = npeconfig[unit].tx_qid;
+	sc->tx_doneqid = npeconfig[unit].tx_doneqid;
+	ixpqmgr_qconfig(sc->tx_qid, npe_txbuf, 0, npe_txbuf, 0, NULL, sc);
+	if (tx_doneqid == -1) {
+		ixpqmgr_qconfig(sc->tx_doneqid,	npe_txbuf, 0,  2,
+			IX_QMGR_Q_SOURCE_ID_NOT_E, npe_txdone, sc);
+		tx_doneqid = sc->tx_doneqid;
+	}
+
+	KASSERT(npes[npeconfig[unit].npeid] == NULL,
+	    ("npe %u already setup", npeconfig[unit].npeid));
+	npes[npeconfig[unit].npeid] = sc;
+
+	return 0;
+}
+
+static void
+npe_deactivate(device_t dev)
+{
+	struct npe_softc *sc = device_get_softc(dev);
+	int unit = device_get_unit(dev);
+
+	npes[npeconfig[unit].npeid] = NULL;
+
+	/* XXX disable q's */
+	if (sc->sc_npe != NULL)
+		ixpnpe_stop(sc->sc_npe);
+	if (sc->sc_stats != NULL) {
+		bus_dmamap_unload(sc->sc_stats_tag, sc->sc_stats_map);
+		bus_dmamem_free(sc->sc_stats_tag, sc->sc_stats,
+			sc->sc_stats_map);
+		bus_dmamap_destroy(sc->sc_stats_tag, sc->sc_stats_map);
+	}
+	if (sc->sc_stats_tag != NULL)
+		bus_dma_tag_destroy(sc->sc_stats_tag);
+	npe_dma_destroy(sc, &sc->txdma);
+	npe_dma_destroy(sc, &sc->rxdma);
+	bus_generic_detach(sc->sc_dev);
+	if (sc->sc_mii)
+		device_delete_child(sc->sc_dev, sc->sc_mii);
+#if 0
+	/* XXX sc_ioh and sc_miih */
+	if (sc->mem_res)
+		bus_release_resource(dev, SYS_RES_IOPORT,
+		    rman_get_rid(sc->mem_res), sc->mem_res);
+	sc->mem_res = 0;
+#endif
+}
+
+/*
+ * Change media according to request.
+ */
+static int
+npe_ifmedia_update(struct ifnet *ifp)
+{
+	struct npe_softc *sc = ifp->if_softc;
+	struct mii_data *mii;
+
+	mii = device_get_softc(sc->sc_mii);
+	NPE_LOCK(sc);
+	mii_mediachg(mii);
+	/* XXX push state ourself? */
+	NPE_UNLOCK(sc);
+	return (0);
+}
+
+/*
+ * Notify the world which media we're using.
+ */
+static void
+npe_ifmedia_status(struct ifnet *ifp, struct ifmediareq *ifmr)
+{
+	struct npe_softc *sc = ifp->if_softc;
+	struct mii_data *mii;
+
+	mii = device_get_softc(sc->sc_mii);
+	NPE_LOCK(sc);
+	mii_pollstat(mii);
+	ifmr->ifm_active = mii->mii_media_active;
+	ifmr->ifm_status = mii->mii_media_status;
+	NPE_UNLOCK(sc);
+}
+
+static void
+npe_addstats(struct npe_softc *sc)
+{
+#define	MIBADD(x)	sc->mibdata.x += be32toh(ns->x)
+	struct ifnet *ifp = sc->sc_ifp;
+	struct npestats *ns = sc->sc_stats;
+
+	MIBADD(dot3StatsAlignmentErrors);
+	MIBADD(dot3StatsFCSErrors);
+	MIBADD(dot3StatsSingleCollisionFrames);
+	MIBADD(dot3StatsMultipleCollisionFrames);
+	MIBADD(dot3StatsDeferredTransmissions);
+	MIBADD(dot3StatsLateCollisions);
+	MIBADD(dot3StatsExcessiveCollisions);
+	MIBADD(dot3StatsInternalMacTransmitErrors);
+	MIBADD(dot3StatsCarrierSenseErrors);
+	sc->mibdata.dot3StatsFrameTooLongs +=
+	      be32toh(ns->RxLargeFramesDiscards)
+	    + be32toh(ns->TxLargeFrameDiscards);
+	MIBADD(dot3StatsInternalMacReceiveErrors);
+	sc->mibdata.dot3StatsMissedFrames +=
+	      be32toh(ns->RxOverrunDiscards)
+	    + be32toh(ns->RxUnderflowEntryDiscards);
+
+	ifp->if_oerrors +=
+		  be32toh(ns->dot3StatsInternalMacTransmitErrors)
+		+ be32toh(ns->dot3StatsCarrierSenseErrors)
+		+ be32toh(ns->TxVLANIdFilterDiscards)
+		;
+	ifp->if_ierrors += be32toh(ns->dot3StatsFCSErrors)
+		+ be32toh(ns->dot3StatsInternalMacReceiveErrors)
+		+ be32toh(ns->RxOverrunDiscards)
+		+ be32toh(ns->RxUnderflowEntryDiscards)
+		;
+	ifp->if_collisions +=
+		  be32toh(ns->dot3StatsSingleCollisionFrames)
+		+ be32toh(ns->dot3StatsMultipleCollisionFrames)
+		;
+#undef MIBADD
+}
+
+static void
+npe_tick(void *xsc)
+{
+#define	ACK	(NPE_RESETSTATS << NPE_MAC_MSGID_SHL)
+	struct npe_softc *sc = xsc;
+	struct mii_data *mii = device_get_softc(sc->sc_mii);
+	uint32_t msg[2];
+
+	NPE_ASSERT_LOCKED(sc);
+
+	/*
+	 * NB: to avoid sleeping with the softc lock held we
+	 * split the NPE msg processing into two parts.  The
+	 * request for statistics is sent w/o waiting for a
+	 * reply and then on the next tick we retrieve the
+	 * results.  This works because npe_tick is the only
+	 * code that talks via the mailbox's (except at setup).
+	 * This likely can be handled better.
+	 */
+	if (ixpnpe_recvmsg(sc->sc_npe, msg) == 0 && msg[0] == ACK) {
+		bus_dmamap_sync(sc->sc_stats_tag, sc->sc_stats_map,
+		    BUS_DMASYNC_POSTREAD);
+		npe_addstats(sc);
+	}
+	npe_updatestats(sc);
+	mii_tick(mii);
+
+	/* schedule next poll */
+	callout_reset(&sc->tick_ch, sc->sc_tickinterval * hz, npe_tick, sc);
+#undef ACK
+}
+
+static void
+npe_setmac(struct npe_softc *sc, u_char *eaddr)
+{
+	WR4(sc, NPE_MAC_UNI_ADDR_1, eaddr[0]);
+	WR4(sc, NPE_MAC_UNI_ADDR_2, eaddr[1]);
+	WR4(sc, NPE_MAC_UNI_ADDR_3, eaddr[2]);
+	WR4(sc, NPE_MAC_UNI_ADDR_4, eaddr[3]);
+	WR4(sc, NPE_MAC_UNI_ADDR_5, eaddr[4]);
+	WR4(sc, NPE_MAC_UNI_ADDR_6, eaddr[5]);
+
+}
+
+static void
+npe_getmac(struct npe_softc *sc, u_char *eaddr)
+{
+	/* NB: the unicast address appears to be loaded from EEPROM on reset */
+	eaddr[0] = RD4(sc, NPE_MAC_UNI_ADDR_1) & 0xff;
+	eaddr[1] = RD4(sc, NPE_MAC_UNI_ADDR_2) & 0xff;
+	eaddr[2] = RD4(sc, NPE_MAC_UNI_ADDR_3) & 0xff;
+	eaddr[3] = RD4(sc, NPE_MAC_UNI_ADDR_4) & 0xff;
+	eaddr[4] = RD4(sc, NPE_MAC_UNI_ADDR_5) & 0xff;
+	eaddr[5] = RD4(sc, NPE_MAC_UNI_ADDR_6) & 0xff;
+}
+
+struct txdone {
+	struct npebuf *head;
+	struct npebuf **tail;
+	int count;
+};
+
+static __inline void
+npe_txdone_finish(struct npe_softc *sc, const struct txdone *td)
+{
+	struct ifnet *ifp = sc->sc_ifp;
+
+	NPE_LOCK(sc);
+	*td->tail = sc->tx_free;
+	sc->tx_free = td->head;
+	/*
+	 * We're no longer busy, so clear the busy flag and call the
+	 * start routine to xmit more packets.
+	 */
+	ifp->if_opackets += td->count;
+	ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
+	ifp->if_timer = 0;
+	npestart_locked(ifp);
+	NPE_UNLOCK(sc);
+}
+
+/*
+ * Q manager callback on tx done queue.  Reap mbufs
+ * and return tx buffers to the free list.  Finally
+ * restart output.  Note the microcode has only one
+ * txdone q wired into it so we must use the NPE ID
+ * returned with each npehwbuf to decide where to
+ * send buffers.
+ */
+static void
+npe_txdone(int qid, void *arg)
+{
+#define	P2V(a, dma) \
+	&(dma)->buf[((a) - (dma)->buf_phys) / sizeof(struct npehwbuf)]
+	struct npe_softc *sc0 = arg;
+	struct npe_softc *sc;
+	struct npebuf *npe;
+	struct txdone *td, q[NPE_MAX];
+	uint32_t entry;
+
+	/* XXX no NPE-A support */
+	q[NPE_B].tail = &q[NPE_B].head; q[NPE_B].count = 0;
+	q[NPE_C].tail = &q[NPE_C].head; q[NPE_C].count = 0;
+	/* XXX max # at a time? */
+	while (ixpqmgr_qread(qid, &entry) == 0) {
+		DPRINTF(sc0, "%s: entry 0x%x NPE %u port %u\n",
+		    __func__, entry, NPE_QM_Q_NPE(entry), NPE_QM_Q_PORT(entry));
+
+		sc = npes[NPE_QM_Q_NPE(entry)];
+		npe = P2V(NPE_QM_Q_ADDR(entry), &sc->txdma);
+		m_freem(npe->ix_m);
+		npe->ix_m = NULL;
+
+		td = &q[NPE_QM_Q_NPE(entry)];
+		*td->tail = npe;
+		td->tail = &npe->ix_next;
+		td->count++;
+	}
+
+	if (q[NPE_B].count)
+		npe_txdone_finish(npes[NPE_B], &q[NPE_B]);
+	if (q[NPE_C].count)
+		npe_txdone_finish(npes[NPE_C], &q[NPE_C]);
+#undef P2V
+}
+
+static int
+npe_rxbuf_init(struct npe_softc *sc, struct npebuf *npe, struct mbuf *m)
+{
+	bus_dma_segment_t segs[1];
+	struct npedma *dma = &sc->rxdma;
+	struct npehwbuf *hw;
+	int error, nseg;
+
+	if (m == NULL) {
+		m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR);
+		if (m == NULL)
+			return ENOBUFS;
+	}
+	KASSERT(m->m_ext.ext_size >= 1536 + ETHER_ALIGN,
+		("ext_size %d", m->m_ext.ext_size));
+	m->m_pkthdr.len = m->m_len = 1536;
+	/* backload payload and align ip hdr */
+	m->m_data = m->m_ext.ext_buf + (m->m_ext.ext_size - (1536+ETHER_ALIGN));
+	error = bus_dmamap_load_mbuf_sg(dma->mtag, npe->ix_map, m,
+			segs, &nseg, 0);
+	if (error != 0) {
+		m_freem(m);
+		return error;
+	}
+	hw = npe->ix_hw;
+	hw->ix_ne[0].data = htobe32(segs[0].ds_addr);
+	/* NB: NPE requires length be a multiple of 64 */
+	/* NB: buffer length is shifted in word */
+	hw->ix_ne[0].len = htobe32(segs[0].ds_len << 16);
+	hw->ix_ne[0].next = 0;
+	npe->ix_m = m;
+	/* Flush the memory in the mbuf */
+	bus_dmamap_sync(dma->mtag, npe->ix_map, BUS_DMASYNC_PREREAD);
+	return 0;
+}
+
+/*
+ * RX q processing for a specific NPE.  Claim entries
+ * from the hardware queue and pass the frames up the
+ * stack. Pass the rx buffers to the free list.
+ */
+static void
+npe_rxdone(int qid, void *arg)
+{
+#define	P2V(a, dma) \
+	&(dma)->buf[((a) - (dma)->buf_phys) / sizeof(struct npehwbuf)]
+	struct npe_softc *sc = arg;
+	struct npedma *dma = &sc->rxdma;
+	uint32_t entry;
+
+	while (ixpqmgr_qread(qid, &entry) == 0) {
+		struct npebuf *npe = P2V(NPE_QM_Q_ADDR(entry), dma);
+		struct mbuf *m;
+
+		DPRINTF(sc, "%s: entry 0x%x neaddr 0x%x ne_len 0x%x\n",
+		    __func__, entry, npe->ix_neaddr, npe->ix_hw->ix_ne[0].len);
+		/*
+		 * Allocate a new mbuf to replenish the rx buffer.
+		 * If doing so fails we drop the rx'd frame so we
+		 * can reuse the previous mbuf.  When we're able to
+		 * allocate a new mbuf dispatch the mbuf w/ rx'd
+		 * data up the stack and replace it with the newly
+		 * allocated one.
+		 */
+		m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR);
+		if (m != NULL) {
+			struct mbuf *mrx = npe->ix_m;
+			struct npehwbuf *hw = npe->ix_hw;
+			struct ifnet *ifp = sc->sc_ifp;
+
+			/* Flush mbuf memory for rx'd data */
+			bus_dmamap_sync(dma->mtag, npe->ix_map,
+			    BUS_DMASYNC_POSTREAD);
+
+			/* XXX flush hw buffer; works now 'cuz coherent */
+			/* set m_len etc. per rx frame size */
+			mrx->m_len = be32toh(hw->ix_ne[0].len) & 0xffff;
+			mrx->m_pkthdr.len = mrx->m_len;
+			mrx->m_pkthdr.rcvif = ifp;
+			mrx->m_flags |= M_HASFCS;
+
+			ifp->if_ipackets++;
+			ifp->if_input(ifp, mrx);
+		} else {
+			/* discard frame and re-use mbuf */
+			m = npe->ix_m;
+		}
+		if (npe_rxbuf_init(sc, npe, m) == 0) {
+			/* return npe buf to rx free list */
+			ixpqmgr_qwrite(sc->rx_freeqid, npe->ix_neaddr);
+		} else {
+			/* XXX should not happen */
+		}
+	}
+#undef P2V
+}
+
+#ifdef DEVICE_POLLING
+static void
+npe_poll(struct ifnet *ifp, enum poll_cmd cmd, int count)
+{
+	struct npe_softc *sc = ifp->if_softc;
+
+	if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
+		npe_rxdone(sc->rx_qid, sc);
+		npe_txdone(sc->tx_doneqid, sc);	/* XXX polls both NPE's */
+	}
+}
+#endif /* DEVICE_POLLING */
+
+static void
+npe_startxmit(struct npe_softc *sc)
+{
+	struct npedma *dma = &sc->txdma;
+	int i;
+
+	NPE_ASSERT_LOCKED(sc);
+	sc->tx_free = NULL;
+	for (i = 0; i < dma->nbuf; i++) {
+		struct npebuf *npe = &dma->buf[i];
+		if (npe->ix_m != NULL) {
+			/* NB: should not happen */
+			device_printf(sc->sc_dev,
+			    "%s: free mbuf at entry %u\n", __func__, i);
+			m_freem(npe->ix_m);
+		}
+		npe->ix_m = NULL;
+		npe->ix_next = sc->tx_free;
+		sc->tx_free = npe;
+	}
+}
+
+static void
+npe_startrecv(struct npe_softc *sc)
+{
+	struct npedma *dma = &sc->rxdma;
+	struct npebuf *npe;
+	int i;
+
+	NPE_ASSERT_LOCKED(sc);
+	for (i = 0; i < dma->nbuf; i++) {
+		npe = &dma->buf[i];
+		npe_rxbuf_init(sc, npe, npe->ix_m);
+		/* set npe buf on rx free list */
+		ixpqmgr_qwrite(sc->rx_freeqid, npe->ix_neaddr);
+	}
+}
+
+/*
+ * Reset and initialize the chip
+ */
+static void
+npeinit_locked(void *xsc)
+{
+	struct npe_softc *sc = xsc;
+	struct ifnet *ifp = sc->sc_ifp;
+
+	NPE_ASSERT_LOCKED(sc);
+if (ifp->if_drv_flags & IFF_DRV_RUNNING) return;/*XXX*/
+
+	/*
+	 * Reset MAC core.
+	 */
+	WR4(sc, NPE_MAC_CORE_CNTRL, NPE_CORE_RESET);
+	DELAY(NPE_MAC_RESET_DELAY);
+	/* configure MAC to generate MDC clock */
+	WR4(sc, NPE_MAC_CORE_CNTRL, NPE_CORE_MDC_EN);
+
+	/* disable transmitter and reciver in the MAC */
+ 	WR4(sc, NPE_MAC_RX_CNTRL1,
+	    RD4(sc, NPE_MAC_RX_CNTRL1) &~ NPE_RX_CNTRL1_RX_EN);
+ 	WR4(sc, NPE_MAC_TX_CNTRL1,
+	    RD4(sc, NPE_MAC_TX_CNTRL1) &~ NPE_TX_CNTRL1_TX_EN);
+
+	/*
+	 * Set the MAC core registers.
+	 */
+	WR4(sc, NPE_MAC_INT_CLK_THRESH, 0x1);	/* clock ratio: for ipx4xx */
+	WR4(sc, NPE_MAC_TX_CNTRL2,	0xf);	/* max retries */
+	WR4(sc, NPE_MAC_RANDOM_SEED,	0x8);	/* LFSR back-off seed */
+	/* thresholds determined by NPE firmware FS */
+	WR4(sc, NPE_MAC_THRESH_P_EMPTY,	0x12);
+	WR4(sc, NPE_MAC_THRESH_P_FULL,	0x30);
+	WR4(sc, NPE_MAC_BUF_SIZE_TX,	0x8);	/* tx fifo threshold (bytes) */
+	WR4(sc, NPE_MAC_TX_DEFER,	0x15);	/* for single deferral */
+	WR4(sc, NPE_MAC_RX_DEFER,	0x16);	/* deferral on inter-frame gap*/
+	WR4(sc, NPE_MAC_TX_TWO_DEFER_1,	0x8);	/* for 2-part deferral */
+	WR4(sc, NPE_MAC_TX_TWO_DEFER_2,	0x7);	/* for 2-part deferral */
+	WR4(sc, NPE_MAC_SLOT_TIME,	0x80);	/* assumes MII mode */
+
+	WR4(sc, NPE_MAC_TX_CNTRL1,
+		  NPE_TX_CNTRL1_RETRY		/* retry failed xmits */
+		| NPE_TX_CNTRL1_FCS_EN		/* append FCS */
+		| NPE_TX_CNTRL1_2DEFER		/* 2-part deferal */
+		| NPE_TX_CNTRL1_PAD_EN);	/* pad runt frames */
+	/* XXX pad strip? */
+	WR4(sc, NPE_MAC_RX_CNTRL1,
+		  NPE_RX_CNTRL1_CRC_EN		/* include CRC/FCS */
+		| NPE_RX_CNTRL1_PAUSE_EN);	/* ena pause frame handling */
+	WR4(sc, NPE_MAC_RX_CNTRL2, 0);
+
+	npe_setmac(sc, IF_LLADDR(ifp));
+	npe_setmcast(sc);
+
+	npe_startxmit(sc);
+	npe_startrecv(sc);
+
+	ifp->if_drv_flags |= IFF_DRV_RUNNING;
+	ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
+	ifp->if_timer = 0;		/* just in case */
+
+	/* enable transmitter and reciver in the MAC */
+ 	WR4(sc, NPE_MAC_RX_CNTRL1,
+	    RD4(sc, NPE_MAC_RX_CNTRL1) | NPE_RX_CNTRL1_RX_EN);
+ 	WR4(sc, NPE_MAC_TX_CNTRL1,
+	    RD4(sc, NPE_MAC_TX_CNTRL1) | NPE_TX_CNTRL1_TX_EN);
+
+	callout_reset(&sc->tick_ch, sc->sc_tickinterval * hz, npe_tick, sc);
+}
+
+static void
+npeinit(void *xsc)
+{
+	struct npe_softc *sc = xsc;
+	NPE_LOCK(sc);
+	npeinit_locked(sc);
+	NPE_UNLOCK(sc);
+}
+
+/*
+ * Defragment an mbuf chain, returning at most maxfrags separate
+ * mbufs+clusters.  If this is not possible NULL is returned and
+ * the original mbuf chain is left in it's present (potentially
+ * modified) state.  We use two techniques: collapsing consecutive
+ * mbufs and replacing consecutive mbufs by a cluster.
+ */
+static struct mbuf *
+npe_defrag(struct mbuf *m0, int how, int maxfrags)
+{
+	struct mbuf *m, *n, *n2, **prev;
+	u_int curfrags;
+
+	/*
+	 * Calculate the current number of frags.
+	 */
+	curfrags = 0;
+	for (m = m0; m != NULL; m = m->m_next)
+		curfrags++;
+	/*
+	 * First, try to collapse mbufs.  Note that we always collapse
+	 * towards the front so we don't need to deal with moving the
+	 * pkthdr.  This may be suboptimal if the first mbuf has much
+	 * less data than the following.
+	 */
+	m = m0;
+again:
+	for (;;) {
+		n = m->m_next;
+		if (n == NULL)
+			break;
+		if ((m->m_flags & M_RDONLY) == 0 &&
+		    n->m_len < M_TRAILINGSPACE(m)) {
+			bcopy(mtod(n, void *), mtod(m, char *) + m->m_len,
+				n->m_len);
+			m->m_len += n->m_len;
+			m->m_next = n->m_next;
+			m_free(n);
+			if (--curfrags <= maxfrags)
+				return m0;
+		} else
+			m = n;
+	}
+	KASSERT(maxfrags > 1,
+		("maxfrags %u, but normal collapse failed", maxfrags));
+	/*
+	 * Collapse consecutive mbufs to a cluster.
+	 */
+	prev = &m0->m_next;		/* NB: not the first mbuf */
+	while ((n = *prev) != NULL) {
+		if ((n2 = n->m_next) != NULL &&
+		    n->m_len + n2->m_len < MCLBYTES) {
+			m = m_getcl(how, MT_DATA, 0);
+			if (m == NULL)
+				goto bad;
+			bcopy(mtod(n, void *), mtod(m, void *), n->m_len);
+			bcopy(mtod(n2, void *), mtod(m, char *) + n->m_len,
+				n2->m_len);
+			m->m_len = n->m_len + n2->m_len;
+			m->m_next = n2->m_next;
+			*prev = m;
+			m_free(n);
+			m_free(n2);
+			if (--curfrags <= maxfrags)	/* +1 cl -2 mbufs */
+				return m0;
+			/*
+			 * Still not there, try the normal collapse
+			 * again before we allocate another cluster.
+			 */
+			goto again;
+		}
+		prev = &n->m_next;
+	}
+	/*
+	 * No place where we can collapse to a cluster; punt.
+	 * This can occur if, for example, you request 2 frags
+	 * but the packet requires that both be clusters (we
+	 * never reallocate the first mbuf to avoid moving the
+	 * packet header).
+	 */
+bad:
+	return NULL;
+}
+
+/*
+ * Dequeue packets and place on the h/w transmit queue.
+ */
+static void
+npestart_locked(struct ifnet *ifp)
+{
+	struct npe_softc *sc = ifp->if_softc;
+	struct npebuf *npe;
+	struct npehwbuf *hw;
+	struct mbuf *m, *n;
+	struct npedma *dma = &sc->txdma;
+	bus_dma_segment_t segs[NPE_MAXSEG];
+	int nseg, len, error, i;
+	uint32_t next;
+
+	NPE_ASSERT_LOCKED(sc);
+	/* XXX can this happen? */
+	if (ifp->if_drv_flags & IFF_DRV_OACTIVE)
+		return;
+
+	while (sc->tx_free != NULL) {
+		IFQ_DRV_DEQUEUE(&ifp->if_snd, m);
+		if (m == NULL) {
+			/* XXX? */
+			ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
+			return;
+		}
+		npe = sc->tx_free;
+		error = bus_dmamap_load_mbuf_sg(dma->mtag, npe->ix_map,
+		    m, segs, &nseg, 0);
+		if (error == EFBIG) {
+			n = npe_defrag(m, M_DONTWAIT, NPE_MAXSEG);
+			if (n == NULL) {
+				if_printf(ifp, "%s: too many fragments %u\n",
+				    __func__, nseg);
+				m_freem(m);
+				return;	/* XXX? */
+			}
+			m = n;
+			error = bus_dmamap_load_mbuf_sg(dma->mtag, npe->ix_map,
+			    m, segs, &nseg, 0);
+		}
+		if (error != 0 || nseg == 0) {
+			if_printf(ifp, "%s: error %u nseg %u\n",
+			    __func__, error, nseg);
+			m_freem(m);
+			return;	/* XXX? */
+		}
+		sc->tx_free = npe->ix_next;
+
+		bus_dmamap_sync(dma->mtag, npe->ix_map, BUS_DMASYNC_PREWRITE);
+	
+		/*
+		 * Tap off here if there is a bpf listener.
+		 */
+		BPF_MTAP(ifp, m);
+
+		npe->ix_m = m;
+		hw = npe->ix_hw;
+		len = m->m_pkthdr.len;
+		next = npe->ix_neaddr + sizeof(hw->ix_ne[0]);
+		for (i = 0; i < nseg; i++) {
+			hw->ix_ne[i].data = htobe32(segs[i].ds_addr);
+			hw->ix_ne[i].len = htobe32((segs[i].ds_len<<16) | len);
+			hw->ix_ne[i].next = htobe32(next);
+
+			len = 0;		/* zero for segments > 1 */
+			next += sizeof(hw->ix_ne[0]);
+		}
+		hw->ix_ne[i-1].next = 0;	/* zero last in chain */
+		/* XXX flush descriptor instead of using uncached memory */
+
+		DPRINTF(sc, "%s: qwrite(%u, 0x%x) ne_data %x ne_len 0x%x\n",
+		    __func__, sc->tx_qid, npe->ix_neaddr,
+		    hw->ix_ne[0].data, hw->ix_ne[0].len);
+		/* stick it on the tx q */
+		/* XXX add vlan priority */
+		ixpqmgr_qwrite(sc->tx_qid, npe->ix_neaddr);
+
+		ifp->if_timer = 5;
+	}
+	if (sc->tx_free == NULL)
+		ifp->if_drv_flags |= IFF_DRV_OACTIVE;
+}
+
+void
+npestart(struct ifnet *ifp)
+{
+	struct npe_softc *sc = ifp->if_softc;
+	NPE_LOCK(sc);
+	npestart_locked(ifp);
+	NPE_UNLOCK(sc);
+}
+
+static void
+npe_stopxmit(struct npe_softc *sc)
+{
+	struct npedma *dma = &sc->txdma;
+	int i;
+
+	NPE_ASSERT_LOCKED(sc);
+
+	/* XXX qmgr */
+	for (i = 0; i < dma->nbuf; i++) {
+		struct npebuf *npe = &dma->buf[i];
+
+		if (npe->ix_m != NULL) {
+			bus_dmamap_unload(dma->mtag, npe->ix_map);
+			m_freem(npe->ix_m);
+			npe->ix_m = NULL;
+		}
+	}
+}
+
+static void
+npe_stoprecv(struct npe_softc *sc)
+{
+	struct npedma *dma = &sc->rxdma;
+	int i;
+
+	NPE_ASSERT_LOCKED(sc);
+
+	/* XXX qmgr */
+	for (i = 0; i < dma->nbuf; i++) {
+		struct npebuf *npe = &dma->buf[i];
+
+		if (npe->ix_m != NULL) {
+			bus_dmamap_unload(dma->mtag, npe->ix_map);
+			m_freem(npe->ix_m);
+			npe->ix_m = NULL;
+		}
+	}
+}
+
+/*
+ * Turn off interrupts, and stop the nic.
+ */
+void
+npestop(struct npe_softc *sc)
+{
+	struct ifnet *ifp = sc->sc_ifp;
+
+	/*  disable transmitter and reciver in the MAC  */
+ 	WR4(sc, NPE_MAC_RX_CNTRL1,
+	    RD4(sc, NPE_MAC_RX_CNTRL1) &~ NPE_RX_CNTRL1_RX_EN);
+ 	WR4(sc, NPE_MAC_TX_CNTRL1,
+	    RD4(sc, NPE_MAC_TX_CNTRL1) &~ NPE_TX_CNTRL1_TX_EN);
+
+	ifp->if_timer = 0;
+	ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
+
+	callout_stop(&sc->tick_ch);
+
+	npe_stopxmit(sc);
+	npe_stoprecv(sc);
+	/* XXX go into loopback & drain q's? */
+	/* XXX but beware of disabling tx above */
+
+	/*
+	 * The MAC core rx/tx disable may leave the MAC hardware in an
+	 * unpredictable state. A hw reset is executed before resetting 
+	 * all the MAC parameters to a known value.
+	 */
+	WR4(sc, NPE_MAC_CORE_CNTRL, NPE_CORE_RESET);
+	DELAY(NPE_MAC_RESET_DELAY);
+	WR4(sc, NPE_MAC_INT_CLK_THRESH, NPE_MAC_INT_CLK_THRESH_DEFAULT);
+	WR4(sc, NPE_MAC_CORE_CNTRL, NPE_CORE_MDC_EN);
+}
+
+void
+npewatchdog(struct ifnet *ifp)
+{
+	struct npe_softc *sc = ifp->if_softc;
+
+	NPE_LOCK(sc);
+	if_printf(ifp, "device timeout\n");
+	ifp->if_oerrors++;
+	npeinit_locked(sc);
+	NPE_UNLOCK(sc);
+}
+
+static int
+npeioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
+{
+	struct npe_softc *sc = ifp->if_softc;
+ 	struct mii_data *mii;
+ 	struct ifreq *ifr = (struct ifreq *)data;	
+	int error = 0;
+#ifdef DEVICE_POLLING
+	int mask;
+#endif
+
+	switch (cmd) {
+	case SIOCSIFFLAGS:
+		NPE_LOCK(sc);
+		if ((ifp->if_flags & IFF_UP) == 0 &&
+		    ifp->if_drv_flags & IFF_DRV_RUNNING) {
+			ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
+			npestop(sc);
+		} else {
+			/* reinitialize card on any parameter change */
+			npeinit_locked(sc);
+		}
+		NPE_UNLOCK(sc);
+		break;
+
+	case SIOCADDMULTI:
+	case SIOCDELMULTI:
+		/* update multicast filter list. */
+		NPE_LOCK(sc);
+		npe_setmcast(sc);
+		NPE_UNLOCK(sc);
+		error = 0;
+		break;
+
+  	case SIOCSIFMEDIA:
+  	case SIOCGIFMEDIA:
+ 		mii = device_get_softc(sc->sc_mii);
+ 		error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, cmd);
+  		break;
+
+#ifdef DEVICE_POLLING
+	case SIOCSIFCAP:
+		mask = ifp->if_capenable ^ ifr->ifr_reqcap;
+		if (mask & IFCAP_POLLING) {
+			if (ifr->ifr_reqcap & IFCAP_POLLING) {
+				error = ether_poll_register(npe_poll, ifp);
+				if (error)
+					return error;
+				NPE_LOCK(sc);
+				/* disable callbacks XXX txdone is shared */
+				ixpqmgr_notify_disable(sc->rx_qid);
+				ixpqmgr_notify_disable(sc->tx_doneqid);
+				ifp->if_capenable |= IFCAP_POLLING;
+				NPE_UNLOCK(sc);
+			} else {
+				error = ether_poll_deregister(ifp);
+				/* NB: always enable qmgr callbacks */
+				NPE_LOCK(sc);
+				/* enable qmgr callbacks */
+				ixpqmgr_notify_enable(sc->rx_qid,
+				    IX_QMGR_Q_SOURCE_ID_NOT_E);
+				ixpqmgr_notify_enable(sc->tx_doneqid,
+				    IX_QMGR_Q_SOURCE_ID_NOT_E);
+				ifp->if_capenable &= ~IFCAP_POLLING;
+				NPE_UNLOCK(sc);
+			}
+		}
+		break;
+#endif
+	default:
+		error = ether_ioctl(ifp, cmd, data);
+		break;
+	}
+	return error;
+}
+
+/*
+ * Setup a traffic class -> rx queue mapping.
+ */
+static int
+npe_setrxqosentry(struct npe_softc *sc, int classix, int trafclass, int qid)
+{
+	int npeid = npeconfig[device_get_unit(sc->sc_dev)].npeid;
+	uint32_t msg[2];
+
+	msg[0] = (NPE_SETRXQOSENTRY << 24) | (npeid << 20) | classix;
+	msg[1] = (trafclass << 24) | (1 << 23) | (qid << 16) | (qid << 4);
+	return ixpnpe_sendandrecvmsg(sc->sc_npe, msg, msg);
+}
+
+/*
+ * Update and reset the statistics in the NPE.
+ */
+static int
+npe_updatestats(struct npe_softc *sc)
+{
+	uint32_t msg[2];
+
+	msg[0] = NPE_RESETSTATS << NPE_MAC_MSGID_SHL;
+	msg[1] = sc->sc_stats_phys;	/* physical address of stat block */
+	return ixpnpe_sendmsg(sc->sc_npe, msg);		/* NB: no recv */
+}
+
+#if 0
+/*
+ * Get the current statistics block.
+ */
+static int
+npe_getstats(struct npe_softc *sc)
+{
+	uint32_t msg[2];
+
+	msg[0] = NPE_GETSTATS << NPE_MAC_MSGID_SHL;
+	msg[1] = sc->sc_stats_phys;	/* physical address of stat block */
+	return ixpnpe_sendandrecvmsg(sc->sc_npe, msg, msg);
+}
+
+/*
+ * Query the image id of the loaded firmware.
+ */
+static uint32_t
+npe_getimageid(struct npe_softc *sc)
+{
+	uint32_t msg[2];
+
+	msg[0] = NPE_GETSTATUS << NPE_MAC_MSGID_SHL;
+	msg[1] = 0;
+	return ixpnpe_sendandrecvmsg(sc->sc_npe, msg, msg) == 0 ? msg[1] : 0;
+}
+
+/*
+ * Enable/disable loopback.
+ */
+static int
+npe_setloopback(struct npe_softc *sc, int ena)
+{
+	uint32_t msg[2];
+
+	msg[0] = (NPE_SETLOOPBACK << NPE_MAC_MSGID_SHL) | (ena != 0);
+	msg[1] = 0;
+	return ixpnpe_sendandrecvmsg(sc->sc_npe, msg, msg);
+}
+#endif
+
+static void
+npe_child_detached(device_t dev, device_t child)
+{
+	struct npe_softc *sc;
+
+	sc = device_get_softc(dev);
+	if (child == sc->sc_mii)
+		sc->sc_mii = NULL;
+}
+
+/*
+ * MII bus support routines.
+ *
+ * NB: ixp425 has one PHY per NPE
+ */
+static uint32_t
+npe_mii_mdio_read(struct npe_softc *sc, int reg)
+{
+#define	MII_RD4(sc, reg)	bus_space_read_4(sc->sc_iot, sc->sc_miih, reg)
+	uint32_t v;
+
+	/* NB: registers are known to be sequential */
+	v =  (MII_RD4(sc, reg+0) & 0xff) << 0;
+	v |= (MII_RD4(sc, reg+4) & 0xff) << 8;
+	v |= (MII_RD4(sc, reg+8) & 0xff) << 16;
+	v |= (MII_RD4(sc, reg+12) & 0xff) << 24;
+	return v;
+#undef MII_RD4
+}
+
+static void
+npe_mii_mdio_write(struct npe_softc *sc, int reg, uint32_t cmd)
+{
+#define	MII_WR4(sc, reg, v) \
+	bus_space_write_4(sc->sc_iot, sc->sc_miih, reg, v)
+
+	/* NB: registers are known to be sequential */
+	MII_WR4(sc, reg+0, cmd & 0xff);
+	MII_WR4(sc, reg+4, (cmd >> 8) & 0xff);
+	MII_WR4(sc, reg+8, (cmd >> 16) & 0xff);
+	MII_WR4(sc, reg+12, (cmd >> 24) & 0xff);
+#undef MII_WR4
+}
+
+static int
+npe_mii_mdio_wait(struct npe_softc *sc)
+{
+#define	MAXTRIES	100	/* XXX */
+	uint32_t v;
+	int i;
+
+	for (i = 0; i < MAXTRIES; i++) {
+		v = npe_mii_mdio_read(sc, NPE_MAC_MDIO_CMD);
+		if ((v & NPE_MII_GO) == 0)
+			return 1;
+	}
+	return 0;		/* NB: timeout */
+#undef MAXTRIES
+}
+
+static int
+npe_miibus_readreg(device_t dev, int phy, int reg)
+{
+	struct npe_softc *sc = device_get_softc(dev);
+	uint32_t v;
+
+	if (phy != device_get_unit(dev))	/* XXX */
+		return 0xffff;
+	v = (phy << NPE_MII_ADDR_SHL) | (reg << NPE_MII_REG_SHL)
+	  | NPE_MII_GO;
+	npe_mii_mdio_write(sc, NPE_MAC_MDIO_CMD, v);
+	if (npe_mii_mdio_wait(sc))
+		v = npe_mii_mdio_read(sc, NPE_MAC_MDIO_STS);
+	else
+		v = 0xffff | NPE_MII_READ_FAIL;
+	return (v & NPE_MII_READ_FAIL) ? 0xffff : (v & 0xffff);
+#undef MAXTRIES
+}
+
+static void
+npe_miibus_writereg(device_t dev, int phy, int reg, int data)
+{
+	struct npe_softc *sc = device_get_softc(dev);
+	uint32_t v;
+
+	if (phy != device_get_unit(dev))	/* XXX */
+		return;
+	v = (phy << NPE_MII_ADDR_SHL) | (reg << NPE_MII_REG_SHL)
+	  | data | NPE_MII_WRITE
+	  | NPE_MII_GO;
+	npe_mii_mdio_write(sc, NPE_MAC_MDIO_CMD, v);
+	/* XXX complain about timeout */
+	(void) npe_mii_mdio_wait(sc);
+}
+
+static void
+npe_miibus_statchg(device_t dev)
+{
+	struct npe_softc *sc = device_get_softc(dev);
+	struct mii_data *mii = device_get_softc(sc->sc_mii);
+	uint32_t tx1, rx1;
+
+	/* sync MAC duplex state */
+	tx1 = RD4(sc, NPE_MAC_TX_CNTRL1);
+	rx1 = RD4(sc, NPE_MAC_RX_CNTRL1);
+	if ((mii->mii_media_active & IFM_GMASK) == IFM_FDX) {
+		tx1 &= ~NPE_TX_CNTRL1_DUPLEX;
+		rx1 |= NPE_RX_CNTRL1_PAUSE_EN;
+	} else {
+		tx1 |= NPE_TX_CNTRL1_DUPLEX;
+		rx1 &= ~NPE_RX_CNTRL1_PAUSE_EN;
+	}
+	WR4(sc, NPE_MAC_RX_CNTRL1, rx1);
+	WR4(sc, NPE_MAC_TX_CNTRL1, tx1);
+}
+
+static device_method_t npe_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_probe,		npe_probe),
+	DEVMETHOD(device_attach,	npe_attach),
+	DEVMETHOD(device_detach,	npe_detach),
+
+	/* Bus interface */
+	DEVMETHOD(bus_child_detached,	npe_child_detached),
+
+	/* MII interface */
+	DEVMETHOD(miibus_readreg,	npe_miibus_readreg),
+	DEVMETHOD(miibus_writereg,	npe_miibus_writereg),
+	DEVMETHOD(miibus_statchg,	npe_miibus_statchg),
+
+	{ 0, 0 }
+};
+
+static driver_t npe_driver = {
+	"npe",
+	npe_methods,
+	sizeof(struct npe_softc),
+};
+
+DRIVER_MODULE(npe, ixp, npe_driver, npe_devclass, 0, 0);
+DRIVER_MODULE(miibus, npe, miibus_driver, miibus_devclass, 0, 0);
+MODULE_DEPEND(npe, ixpqmgr, 1, 1, 1);
+MODULE_DEPEND(npe, miibus, 1, 1, 1);
+MODULE_DEPEND(npe, ether, 1, 1, 1);
diff --git a/sys/arm/xscale/ixp425/if_npereg.h b/sys/arm/xscale/ixp425/if_npereg.h
new file mode 100644
index 000000000000..d41905d8840b
--- /dev/null
+++ b/sys/arm/xscale/ixp425/if_npereg.h
@@ -0,0 +1,288 @@
+/*-
+ * Copyright (c) 2006 Sam Leffler, Errno Consulting
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
+ *    redistribution must be conditioned upon including a substantially
+ *    similar Disclaimer requirement for further binary redistribution.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
+ * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+ * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGES.
+ *
+ * $FreeBSD$
+ */
+
+/*
+ * Copyright (c) 2001-2005, Intel Corporation.
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Intel Corporation nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef ARM_XSCALE_IF_NPEREG_H
+#define	ARM_XSCALE_IF_NPEREG_H
+
+/*
+ * NPE/NPE tx/rx descriptor format.  This is just the area
+ * shared with ucode running in the NPE; the driver-specific
+ * state is defined in the driver.  The shared area must be
+ * cacheline-aligned.  We allocate NPE_MAXSEG "descriptors"
+ * per buffer; this allows us to do minimal s/g.  The number
+ * of descriptors can be expanded but doing so uses memory
+ * so should be done with care.
+ *
+ * The driver sets up buffers in uncached memory.
+ */
+#define	NPE_MAXSEG	3		/* empirically selected */
+
+struct npehwbuf {
+	struct {			/* NPE shared area, cacheline aligned */
+		uint32_t next;		/* phys addr of next segment */
+		uint32_t len;		/* buffer/segment length (bytes) */
+		uint32_t data;		/* phys addr of data segment */
+		uint32_t pad[5];	/* pad to cacheline */
+	} ix_ne[NPE_MAXSEG];
+};
+
+/* NPE ID's */
+#define	NPE_A		0
+#define	NPE_B		1
+#define	NPE_C		2
+#define	NPE_MAX		(NPE_C+1)
+
+#define NPE_PORTS_MAX		2	/* logical ports */
+#define NPE_FRAME_SIZE_DEFAULT	1536
+#define NPE_FRAME_SIZE_MAX	(65536-64)
+#define NPE_FRAME_SIZE_MIN	64
+
+/*
+ * Queue Manager-related definitions.
+ *
+ * These define the layout of 32-bit Q entries passed
+ * between the host cpu and the NPE's.
+ */
+#define	NPE_QM_Q_NPE(e)		(((e)>>0)&0x3)		/* NPE ID */
+#define	NPE_QM_Q_PORT(e)	(((e)>>3)&0x1)		/* Port ID */
+#define	NPE_QM_Q_PRIO(e)	(((e)>>0)&0x3)		/* 802.1d priority */
+#define	NPE_QM_Q_ADDR(e)	((e)&0xfffffffe0)	/* phys address */
+
+/*
+ * Host->NPE requests written to the shared mailbox.
+ * The NPE writes the same value back as an ACK.
+ */
+#define	NPE_GETSTATUS		0x00	/* get firmware revision */
+#define	NPE_SETPORTADDRESS	0x01	/* set port id and mac address */
+#define	NPE_GETMACADDRDB	0x02	/* upload filter database */
+#define	NPE_SETMACADDRDB	0x03	/* download filter database */
+#define	NPE_GETSTATS		0x04	/* get statistics */
+#define	NPE_RESETSTATS		0x05	/* reset stats + return result */
+#define	NPE_SETMAXFRAME		0x06	/* configure max tx/rx frame lengths */
+#define	NPE_SETRXTAGMODE	0x07	/* configure VLAN rx operating mode */
+#define	NPE_SETDEFRXVID		0x08	/* set def VLAN tag + traffic class */
+#define	NPE_SETRXQOSENTRY	0x0b	/* map user pri -> QoS class+rx qid */
+#define	NPE_SETFIREWALLMODE	0x0e	/* config firewall services */
+#define	NPE_SETLOOPBACK		0x12	/* enable/disable loopback */
+/* ... XXX more */
+
+#define	NPE_MAC_MSGID_SHL	24
+#define	NPE_MAC_PORTID_SHL	16
+
+/*
+ * MAC register definitions; see section
+ * 15.2 of the Intel Developers Manual.
+ */
+#define	NPE_MAC_TX_CNTRL1	0x000
+#define	NPE_MAC_TX_CNTRL2	0x004
+#define	NPE_MAC_RX_CNTRL1	0x010
+#define	NPE_MAC_RX_CNTRL2	0x014
+#define	NPE_MAC_RANDOM_SEED	0x020
+#define	NPE_MAC_THRESH_P_EMPTY	0x030
+#define	NPE_MAC_THRESH_P_FULL	0x038
+#define	NPE_MAC_BUF_SIZE_TX	0x040
+#define	NPE_MAC_TX_DEFER	0x050
+#define	NPE_MAC_RX_DEFER	0x054
+#define	NPE_MAC_TX_TWO_DEFER_1	0x060
+#define	NPE_MAC_TX_TWO_DEFER_2	0x064
+#define	NPE_MAC_SLOT_TIME	0x070
+#define	NPE_MAC_MDIO_CMD_1	0x080
+#define	NPE_MAC_MDIO_CMD_2	0x084
+#define	NPE_MAC_MDIO_CMD_3	0x088
+#define	NPE_MAC_MDIO_CMD_4	0x08c
+#define	NPE_MAC_MDIO_STS_1	0x090
+#define	NPE_MAC_MDIO_STS_2	0x094
+#define	NPE_MAC_MDIO_STS_3	0x098
+#define	NPE_MAC_MDIO_STS_4	0x09c
+#define	NPE_MAC_ADDR_MASK_1	0x0A0
+#define	NPE_MAC_ADDR_MASK_2	0x0A4
+#define	NPE_MAC_ADDR_MASK_3	0x0A8
+#define	NPE_MAC_ADDR_MASK_4	0x0AC
+#define	NPE_MAC_ADDR_MASK_5	0x0B0
+#define	NPE_MAC_ADDR_MASK_6	0x0B4
+#define	NPE_MAC_ADDR_1		0x0C0
+#define	NPE_MAC_ADDR_2		0x0C4
+#define	NPE_MAC_ADDR_3		0x0C8
+#define	NPE_MAC_ADDR_4		0x0CC
+#define	NPE_MAC_ADDR_5		0x0D0
+#define	NPE_MAC_ADDR_6		0x0D4
+#define	NPE_MAC_INT_CLK_THRESH	0x0E0
+#define	NPE_MAC_UNI_ADDR_1	0x0F0
+#define	NPE_MAC_UNI_ADDR_2	0x0F4
+#define	NPE_MAC_UNI_ADDR_3	0x0F8
+#define	NPE_MAC_UNI_ADDR_4	0x0FC
+#define	NPE_MAC_UNI_ADDR_5	0x100
+#define	NPE_MAC_UNI_ADDR_6	0x104
+#define	NPE_MAC_CORE_CNTRL	0x1FC
+
+#define	NPE_MAC_ADDR_MASK(i)    (NPE_MAC_ADDR_MASK_1 + ((i)<<2))
+#define	NPE_MAC_ADDR(i)     	(NPE_MAC_ADDR_1 + ((i)<<2))
+#define	NPE_MAC_UNI_ADDR(i)    	(NPE_MAC_UNI_ADDR_1 + ((i)<<2))
+
+/*
+ * Bit definitions
+ */
+
+/* TX Control Register 1*/
+#define	NPE_TX_CNTRL1_TX_EN		0x01	/* enable TX engine */
+#define	NPE_TX_CNTRL1_DUPLEX		0x02	/* select half duplex */
+#define	NPE_TX_CNTRL1_RETRY		0x04	/* auto-retry on collision */
+#define	NPE_TX_CNTRL1_PAD_EN		0x08	/* pad frames <64 bytes */
+#define	NPE_TX_CNTRL1_FCS_EN		0x10	/* append FCS */
+#define	NPE_TX_CNTRL1_2DEFER		0x20	/* select 2-part deferral */
+#define	NPE_TX_CNTRL1_RMII		0x40
+
+/* TX Control Register 2 */
+#define	NPE_TX_CNTRL2_RETRIES_MASK	0xf	/* max retry count */
+
+/* RX Control Register 1 */
+#define	NPE_RX_CNTRL1_RX_EN		0x01	/* enable RX engine */
+#define	NPE_RX_CNTRL1_PADSTRIP_EN	0x02	/* strip frame padding */
+#define	NPE_RX_CNTRL1_CRC_EN		0x04	/* include CRC in RX frame */
+#define	NPE_RX_CNTRL1_PAUSE_EN		0x08	/* detect Pause frames */
+#define	NPE_RX_CNTRL1_LOOP_EN		0x10	/* loopback tx/rx */
+#define	NPE_RX_CNTRL1_ADDR_FLTR_EN	0x20	/* enable address filtering */
+#define	NPE_RX_CNTRL1_RX_RUNT_EN	0x40	/* enable RX of runt frames */
+#define	NPE_RX_CNTRL1_BCAST_DIS		0x80	/* discard broadcast frames */
+
+/* RX Control Register 2 */
+#define	NPE_RX_CNTRL2_DEFER_EN	0x01
+
+/* Core Control Register */
+#define	NPE_CORE_RESET			0x01	/* MAC reset state */
+#define	NPE_CORE_RX_FIFO_FLUSH		0x02	/* flush RX FIFO */
+#define	NPE_CORE_TX_FIFO_FLUSH		0x04	/* flush TX FIFO */
+#define	NPE_CORE_SEND_JAM		0x08	/* send JAM on packet RX */
+#define	NPE_CORE_MDC_EN			0x10	/* IXP42X drives MDC clock */
+
+/*
+ * Stat block returned by NPE with NPE_GETSTATS msg.
+ */
+struct npestats {
+	uint32_t dot3StatsAlignmentErrors;
+	uint32_t dot3StatsFCSErrors;
+	uint32_t dot3StatsInternalMacReceiveErrors;
+	uint32_t RxOverrunDiscards;
+	uint32_t RxLearnedEntryDiscards;
+	uint32_t RxLargeFramesDiscards;
+	uint32_t RxSTPBlockedDiscards;
+	uint32_t RxVLANTypeFilterDiscards;
+	uint32_t RxVLANIdFilterDiscards;
+	uint32_t RxInvalidSourceDiscards;
+	uint32_t RxBlackListDiscards;
+	uint32_t RxWhiteListDiscards;
+	uint32_t RxUnderflowEntryDiscards;
+	uint32_t dot3StatsSingleCollisionFrames;
+	uint32_t dot3StatsMultipleCollisionFrames;
+	uint32_t dot3StatsDeferredTransmissions;
+	uint32_t dot3StatsLateCollisions;
+	uint32_t dot3StatsExcessiveCollisions;
+	uint32_t dot3StatsInternalMacTransmitErrors;
+	uint32_t dot3StatsCarrierSenseErrors;
+	uint32_t TxLargeFrameDiscards;
+	uint32_t TxVLANIdFilterDiscards;
+};
+
+/*
+ * Default values
+ */
+#define NPE_MAC_INT_CLK_THRESH_DEFAULT  0x1
+
+#define NPE_MAC_RESET_DELAY    1
+
+/* This value applies to RMII */
+#define NPE_MAC_SLOT_TIME_RMII_DEFAULT  0xFF
+
+/*
+ * MII definitions - these have been verified against the LXT971 and LXT972 PHYs
+ */
+#define	NPE_MII_REG_SHL		16
+#define	NPE_MII_ADDR_SHL	21
+
+/* NB: shorthands for mii bus mdio routines */
+#define	NPE_MAC_MDIO_CMD	NPE_MAC_MDIO_CMD_1
+#define	NPE_MAC_MDIO_STS	NPE_MAC_MDIO_STS_1
+ 
+#define NPE_MII_GO                  (1<<31)
+#define NPE_MII_WRITE               (1<<26)
+#define NPE_MII_TIMEOUT_10TH_SECS        5    
+#define NPE_MII_10TH_SEC_IN_MILLIS     100
+#define NPE_MII_READ_FAIL           (1<<31)
+ 
+#define NPE_MII_PHY_DEF_DELAY	300	/* max delay before link up, etc. */
+#define NPE_MII_PHY_NO_DELAY	0x0	/* do not delay */
+#define NPE_MII_PHY_NULL	0xff	/* PHY is not present */
+#define NPE_MII_PHY_DEF_ADDR	0x0	/* default PHY's logical address */
+
+/* Register definition */  
+#define NPE_MII_CTRL_REG	0x0	/* Control Register */
+#define NPE_MII_STAT_REG	0x1	/* Status Register */
+#define NPE_MII_PHY_ID1_REG	0x2	/* PHY identifier 1 Register */
+#define NPE_MII_PHY_ID2_REG	0x3	/* PHY identifier 2 Register */
+#define NPE_MII_AN_ADS_REG	0x4	/* Auto-Negotiation 	  */
+					/* Advertisement Register */
+#define NPE_MII_AN_PRTN_REG	0x5	/* Auto-Negotiation 	    */
+					/* partner ability Register */
+#define NPE_MII_AN_EXP_REG	0x6	/* Auto-Negotiation   */
+					/* Expansion Register */
+#define NPE_MII_AN_NEXT_REG	0x7	/* Auto-Negotiation 	       */
+					/* next-page transmit Register */
+#endif /* ARM_XSCALE_IF_NPEREG_H */
diff --git a/sys/arm/xscale/ixp425/ixdp425_pci.c b/sys/arm/xscale/ixp425/ixdp425_pci.c
new file mode 100644
index 000000000000..7504baa59fea
--- /dev/null
+++ b/sys/arm/xscale/ixp425/ixdp425_pci.c
@@ -0,0 +1,169 @@
+/*      $NetBSD: ixdp425_pci.c,v 1.5 2005/12/11 12:17:09 christos Exp $ */
+/*
+ * Copyright (c) 2003
+ *	Ichiro FUKUHARA <ichiro@ichiro.org>.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by Ichiro FUKUHARA.
+ * 4. The name of the company nor the name of the author may be used to
+ *    endorse or promote products derived from this software without specific
+ *    prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#define _ARM32_BUS_DMA_PRIVATE
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/malloc.h>
+#include <sys/rman.h>
+#include <machine/bus.h>
+#include <machine/intr.h>
+
+#include <arm/xscale/ixp425/ixp425reg.h>
+#include <arm/xscale/ixp425/ixp425var.h>
+#include <arm/xscale/ixp425/ixp425_intr.h>
+#include <arm/xscale/ixp425/ixdp425reg.h>
+
+void
+ixp425_md_attach(device_t dev)
+{
+	struct ixp425_softc *sc = device_get_softc(device_get_parent(dev));
+	struct ixppcib_softc *pci_sc = device_get_softc(dev);
+	uint32_t reg;
+
+	
+	/* PCI Reset Assert */
+	reg = GPIO_CONF_READ_4(sc, IXP425_GPIO_GPOUTR);
+	reg &= ~(1U << GPIO_PCI_RESET);
+	GPIO_CONF_WRITE_4(sc, IXP425_GPIO_GPOUTR, reg & ~(1U << GPIO_PCI_RESET));
+
+	/* PCI Clock Disable */
+	reg = GPIO_CONF_READ_4(sc, IXP425_GPIO_GPCLKR);
+	reg &= ~GPCLKR_MUX14;
+	GPIO_CONF_WRITE_4(sc, IXP425_GPIO_GPCLKR, reg & ~GPCLKR_MUX14);
+
+	/*
+	 * set GPIO Direction
+	 *	Output: PCI_CLK, PCI_RESET
+	 *	Input:  PCI_INTA, PCI_INTB, PCI_INTC, PCI_INTD
+	 */
+	reg = GPIO_CONF_READ_4(sc, IXP425_GPIO_GPOER);
+	reg &= ~(1U << GPIO_PCI_CLK);
+	reg &= ~(1U << GPIO_PCI_RESET);
+	reg |= ((1U << GPIO_PCI_INTA) | (1U << GPIO_PCI_INTB) |
+		(1U << GPIO_PCI_INTC) | (1U << GPIO_PCI_INTD));
+	GPIO_CONF_WRITE_4(sc, IXP425_GPIO_GPOER, reg);
+
+	/*
+	 * Set GPIO interrupt type
+	 * 	PCI_INT_A, PCI_INTB, PCI_INT_C, PCI_INT_D: Active Low
+	 */
+	reg = GPIO_CONF_READ_4(sc, GPIO_TYPE_REG(GPIO_PCI_INTA));
+	reg &= ~GPIO_TYPE(GPIO_PCI_INTA, GPIO_TYPE_MASK);
+	reg |= GPIO_TYPE(GPIO_PCI_INTA, GPIO_TYPE_ACT_LOW);
+	GPIO_CONF_WRITE_4(sc, GPIO_TYPE_REG(GPIO_PCI_INTA), reg);
+
+	reg = GPIO_CONF_READ_4(sc, GPIO_TYPE_REG(GPIO_PCI_INTB));
+	reg &= ~GPIO_TYPE(GPIO_PCI_INTB, GPIO_TYPE_MASK);
+	reg |= GPIO_TYPE(GPIO_PCI_INTB, GPIO_TYPE_ACT_LOW);
+	GPIO_CONF_WRITE_4(sc, GPIO_TYPE_REG(GPIO_PCI_INTB), reg);
+
+	reg = GPIO_CONF_READ_4(sc, GPIO_TYPE_REG(GPIO_PCI_INTC));
+	reg &= ~GPIO_TYPE(GPIO_PCI_INTC, GPIO_TYPE_MASK);
+	reg |= GPIO_TYPE(GPIO_PCI_INTC, GPIO_TYPE_ACT_LOW);
+	GPIO_CONF_WRITE_4(sc, GPIO_TYPE_REG(GPIO_PCI_INTC), reg);
+
+	reg = GPIO_CONF_READ_4(sc, GPIO_TYPE_REG(GPIO_PCI_INTD));
+	reg &= ~GPIO_TYPE(GPIO_PCI_INTD, GPIO_TYPE_MASK);
+	reg |= GPIO_TYPE(GPIO_PCI_INTD, GPIO_TYPE_ACT_LOW);
+	GPIO_CONF_WRITE_4(sc, GPIO_TYPE_REG(GPIO_PCI_INTD), reg);
+
+	/* clear ISR */
+	GPIO_CONF_WRITE_4(sc, IXP425_GPIO_GPISR,
+			  (1U << GPIO_PCI_INTA) | (1U << GPIO_PCI_INTB) |
+			  (1U << GPIO_PCI_INTC) | (1U << GPIO_PCI_INTD));
+
+	/* wait 1ms to satisfy "minimum reset assertion time" of the PCI spec */
+	DELAY(1000);
+	reg = GPIO_CONF_READ_4(sc, IXP425_GPIO_GPCLKR);
+	GPIO_CONF_WRITE_4(sc, IXP425_GPIO_GPCLKR, reg |
+		(0xf << GPCLKR_CLK0DC_SHIFT) | (0xf << GPCLKR_CLK0TC_SHIFT));
+
+	/* PCI Clock Enable */
+	reg = GPIO_CONF_READ_4(sc, IXP425_GPIO_GPCLKR);
+	reg |= GPCLKR_MUX14;
+	GPIO_CONF_WRITE_4(sc, IXP425_GPIO_GPCLKR, reg | GPCLKR_MUX14);
+
+	/*
+	 * wait 100us to satisfy "minimum reset assertion time from clock stable
+	 * requirement of the PCI spec
+	 */
+	DELAY(100);
+        /* PCI Reset deassert */
+	reg = GPIO_CONF_READ_4(sc, IXP425_GPIO_GPOUTR);
+	reg |= 1U << GPIO_PCI_RESET;
+	GPIO_CONF_WRITE_4(sc, IXP425_GPIO_GPOUTR, reg | (1U << GPIO_PCI_RESET));
+	pci_sc->sc_irq_rman.rm_type = RMAN_ARRAY;
+	pci_sc->sc_irq_rman.rm_descr = "IXP425 PCI IRQs";
+	CTASSERT(PCI_INT_D < PCI_INT_A);
+	/* XXX this overlaps the irq's setup in ixp425_attach */
+	if (rman_init(&pci_sc->sc_irq_rman) != 0 ||
+	    rman_manage_region(&pci_sc->sc_irq_rman, PCI_INT_D, PCI_INT_A) != 0)
+		panic("ixp425_md_attach: failed to set up IRQ rman");
+}
+
+#define	IXP425_MAX_DEV	4
+#define	IXP425_MAX_LINE	4
+
+int
+ixp425_md_route_interrupt(device_t bridge, device_t device, int pin)
+{
+	static int ixp425_pci_table[IXP425_MAX_DEV][IXP425_MAX_LINE] =
+	{
+		{PCI_INT_A, PCI_INT_B, PCI_INT_C, PCI_INT_D},
+		{PCI_INT_B, PCI_INT_C, PCI_INT_D, PCI_INT_A},
+		{PCI_INT_C, PCI_INT_D, PCI_INT_A, PCI_INT_B},
+		{PCI_INT_D, PCI_INT_A, PCI_INT_B, PCI_INT_C},
+	};
+	int dev;
+	
+	dev = pci_get_slot(device);
+	if (bootverbose)
+		device_printf(bridge, "routing pin %d for %s\n", pin,
+		    device_get_nameunit(device));
+	if (pin >= 1 && pin <= IXP425_MAX_LINE &&
+	    dev >= 1 && dev <= IXP425_MAX_DEV) {
+		return (ixp425_pci_table[dev - 1][pin - 1]);
+	} else
+		printf("ixppcib: no mapping for %d/%d/%d\n",
+			pci_get_bus(device), dev, pci_get_function(device));
+
+	return (-1);
+}
diff --git a/sys/arm/xscale/ixp425/ixdp425reg.h b/sys/arm/xscale/ixp425/ixdp425reg.h
new file mode 100644
index 000000000000..06d7ae99f10c
--- /dev/null
+++ b/sys/arm/xscale/ixp425/ixdp425reg.h
@@ -0,0 +1,54 @@
+/*	$NetBSD: ixdp425reg.h,v 1.6 2005/12/11 12:17:09 christos Exp $ */
+/*
+ * Copyright (c) 2003
+ *	Ichiro FUKUHARA <ichiro@ichiro.org>.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by Ichiro FUKUHARA.
+ * 4. The name of the company nor the name of the author may be used to
+ *    endorse or promote products derived from this software without specific
+ *    prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/* $FreeBSD$ */
+#ifndef	_IXDP425REG_H_
+#define	_IXDP425REG_H_
+/* GPIOs */
+#define	GPIO_PCI_CLK	14
+#define	GPIO_PCI_RESET	13
+#define	GPIO_PCI_INTA	11
+#define	GPIO_PCI_INTB	10
+#define	GPIO_PCI_INTC	9
+#define	GPIO_PCI_INTD	8
+#define	GPIO_I2C_SDA	7
+#define  GPIO_I2C_SDA_BIT	(1U << 7)
+#define	GPIO_I2C_SCL	6
+#define	  GPIO_I2C_SCL_BIT	(1U << 6)
+/* Interrupt */
+#define	PCI_INT_A	IXP425_INT_GPIO_11
+#define	PCI_INT_B	IXP425_INT_GPIO_10
+#define	PCI_INT_C	IXP425_INT_GPIO_9
+#define	PCI_INT_D	IXP425_INT_GPIO_8
+#endif /* _IXDP425REG_H_ */
diff --git a/sys/arm/xscale/ixp425/ixp425.c b/sys/arm/xscale/ixp425/ixp425.c
new file mode 100644
index 000000000000..48ac29ccf91f
--- /dev/null
+++ b/sys/arm/xscale/ixp425/ixp425.c
@@ -0,0 +1,369 @@
+/*	$NetBSD: ixp425.c,v 1.10 2005/12/11 12:16:51 christos Exp $ */
+
+/*
+ * Copyright (c) 2003
+ *	Ichiro FUKUHARA <ichiro@ichiro.org>.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by Ichiro FUKUHARA.
+ * 4. The name of the company nor the name of the author may be used to
+ *    endorse or promote products derived from this software without specific
+ *    prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#define _ARM32_BUS_DMA_PRIVATE
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/malloc.h>
+#include <sys/rman.h>
+#include <machine/bus.h>
+#include <machine/intr.h>
+
+#include <vm/vm.h>
+#include <vm/pmap.h>
+#include <arm/xscale/ixp425/ixp425reg.h>
+#include <arm/xscale/ixp425/ixp425var.h>
+#include <arm/xscale/ixp425/ixp425_intr.h>
+
+#include <dev/pci/pcireg.h>
+
+volatile uint32_t intr_enabled;
+uint32_t intr_steer = 0;
+
+struct	ixp425_softc *ixp425_softc = NULL;
+
+static int	ixp425_probe(device_t);
+static void	ixp425_identify(driver_t *, device_t);
+static int	ixp425_attach(device_t);
+
+static struct {
+	uint32_t	hwbase;
+	uint32_t	size;
+	uint32_t	vbase;
+} hwvtrans[] = {
+	{ IXP425_IO_HWBASE,	IXP425_IO_SIZE,		IXP425_IO_VBASE },
+	{ IXP425_EXP_HWBASE,	IXP425_EXP_SIZE,	IXP425_EXP_VBASE },
+	{ IXP425_PCI_HWBASE,	IXP425_PCI_SIZE,	IXP425_PCI_VBASE },
+	{ IXP425_PCI_MEM_HWBASE,IXP425_PCI_MEM_SIZE,	IXP425_PCI_MEM_VBASE },
+#if 0
+	{ IXP425_PCI_IO_HWBASE,	IXP425_PCI_IO_SIZE,	IXP425_PCI_IO_VBASE },
+#endif
+	{ IXP425_MCU_HWBASE,	IXP425_MCU_SIZE,	IXP425_MCU_VBASE },
+	{ IXP425_QMGR_HWBASE,	IXP425_QMGR_SIZE,	IXP425_QMGR_VBASE },
+	{ IXP425_NPE_A_HWBASE,	IXP425_NPE_A_SIZE,	IXP425_NPE_A_VBASE },
+	{ IXP425_NPE_B_HWBASE,	IXP425_NPE_B_SIZE,	IXP425_NPE_B_VBASE },
+	{ IXP425_NPE_C_HWBASE,	IXP425_NPE_C_SIZE,	IXP425_NPE_C_VBASE },
+	{ IXP425_MAC_A_HWBASE,	IXP425_MAC_A_SIZE,	IXP425_MAC_A_VBASE },
+	{ IXP425_MAC_B_HWBASE,	IXP425_MAC_B_SIZE,	IXP425_MAC_B_VBASE },
+	/* Gateworks Avila IDE/CF is mapped here */
+	{ IXP425_EXP_BUS_CS1_HWBASE, IXP425_EXP_BUS_SIZE,
+	  IXP425_EXP_BUS_CS1_VBASE },
+};
+
+static int
+getvbase(uint32_t hwbase, uint32_t size, uint32_t *vbase)
+{
+	int i;
+
+	for (i = 0; i < sizeof hwvtrans / sizeof *hwvtrans; i++) {
+		if (hwbase >= hwvtrans[i].hwbase &&
+		    hwbase + size <= hwvtrans[i].hwbase + hwvtrans[i].size) {
+			*vbase = hwbase - hwvtrans[i].hwbase + hwvtrans[i].vbase;
+			return (0);
+		}
+	}
+
+	return (ENOENT);
+}
+
+struct arm32_dma_range *
+bus_dma_get_range(void)
+{
+	return (NULL);
+}
+
+int
+bus_dma_get_range_nb(void)
+{
+	return (0);
+}
+
+static __inline u_int32_t
+ixp425_irq2gpio_bit(int irq)
+{
+
+	static const uint8_t int2gpio[32] __attribute__ ((aligned(32))) = {
+		0xff, 0xff, 0xff, 0xff, 0xff, 0xff,	/* INT#0 -> INT#5 */
+		0x00, 0x01,				/* GPIO#0 -> GPIO#1 */
+		0xff, 0xff, 0xff, 0xff, 0xff, 0xff,	/* INT#8 -> INT#13 */
+		0xff, 0xff, 0xff, 0xff, 0xff,		/* INT#14 -> INT#18 */
+		0x02, 0x03, 0x04, 0x05, 0x06, 0x07,	/* GPIO#2 -> GPIO#7 */
+		0x08, 0x09, 0x0a, 0x0b, 0x0c,		/* GPIO#8 -> GPIO#12 */
+		0xff, 0xff				/* INT#30 -> INT#31 */
+	};
+
+	return (1U << int2gpio[irq]);
+}
+
+void
+arm_mask_irq(uintptr_t nb)
+{
+	intr_enabled &= ~(1 << nb);
+	ixp425_set_intrmask();
+	/*XXX; If it's a GPIO interrupt, ACK it know. Can it be a problem ?*/
+	if ((1 << nb) & IXP425_INT_GPIOMASK)
+		IXPREG(IXP425_GPIO_VBASE + IXP425_GPIO_GPISR) =
+		    ixp425_irq2gpio_bit(nb);
+
+		
+}
+
+void
+arm_unmask_irq(uintptr_t nb)
+{
+	intr_enabled |= (1 << nb);
+	ixp425_set_intrmask();
+}
+
+static __inline uint32_t
+ixp425_irq_read(void)
+{
+	return IXPREG(IXP425_INT_STATUS) & intr_enabled;
+}
+
+int
+arm_get_next_irq(void)
+{
+	int irq;
+
+	if ((irq = ixp425_irq_read()))
+		return (ffs(irq) - 1);
+	return (-1);
+}
+
+void
+cpu_reset(void)
+{
+
+	bus_space_write_4(&ixp425_bs_tag, IXP425_TIMER_VBASE,
+	    IXP425_OST_WDOG_KEY, OST_WDOG_KEY_MAJICK);
+	bus_space_write_4(&ixp425_bs_tag, IXP425_TIMER_VBASE,
+	    IXP425_OST_WDOG, 0);
+	bus_space_write_4(&ixp425_bs_tag, IXP425_TIMER_VBASE,
+	    IXP425_OST_WDOG_ENAB, OST_WDOG_ENAB_RST_ENA |
+	    OST_WDOG_ENAB_CNT_ENA);
+	printf("Reset failed!\n");
+	for(;;);
+}
+
+static void
+ixp425_identify(driver_t *driver, device_t parent)
+{
+	BUS_ADD_CHILD(parent, 0, "ixp", 0);
+}
+
+static int
+ixp425_probe(device_t dev)
+{
+	device_set_desc(dev, "Intel IXP425");
+	return (0);
+}
+
+static int
+ixp425_attach(device_t dev)
+{
+	struct ixp425_softc *sc;
+
+	sc = device_get_softc(dev);
+	sc->sc_iot = &ixp425_bs_tag;
+	KASSERT(ixp425_softc == NULL, ("ixp425_attach called twice?"));
+	ixp425_softc = sc;
+
+	intr_enabled = 0;
+	ixp425_set_intrmask();
+	ixp425_set_intrsteer();
+
+	sc->sc_irq_rman.rm_type = RMAN_ARRAY;
+	sc->sc_irq_rman.rm_descr = "IXP425 IRQs";
+	if (rman_init(&sc->sc_irq_rman) != 0 ||
+	    rman_manage_region(&sc->sc_irq_rman, 0, 31) != 0)
+		panic("ixp425_attach: failed to set up IRQ rman");
+
+	sc->sc_mem_rman.rm_type = RMAN_ARRAY;
+	sc->sc_mem_rman.rm_descr = "IXP425 Memory";
+	if (rman_init(&sc->sc_mem_rman) != 0 ||
+	    rman_manage_region(&sc->sc_mem_rman, 0, ~0) != 0)
+		panic("ixp425_attach: failed to set up IRQ rman");
+
+	device_add_child(dev, "pcib", 0);
+	device_add_child(dev, "ixpclk", 0);
+	device_add_child(dev, "ixpwdog", 0);
+	device_add_child(dev, "ixpiic", 0);
+	device_add_child(dev, "uart", 0);
+	/* XXX these are optional, what if they are not configured? */
+	device_add_child(dev, "ixpqmgr", 0);
+	device_add_child(dev, "npe", 0);	/* NPE-B */
+	device_add_child(dev, "npe", 1);	/* NPE-C */
+	device_add_child(dev, "ata_avila", 0);	/* XXX */
+
+	if (bus_space_map(sc->sc_iot, IXP425_GPIO_HWBASE, IXP425_GPIO_SIZE,
+	    0, &sc->sc_gpio_ioh))
+		panic("ixp425_attach: unable to map GPIO registers");
+	if (bus_space_map(sc->sc_iot, IXP425_EXP_HWBASE, IXP425_EXP_SIZE,
+	    0, &sc->sc_exp_ioh))
+		panic("ixp425_attach: unable to map Expansion Bus registers");
+
+	bus_generic_probe(dev);
+	bus_generic_attach(dev);
+
+	return (0);
+}
+
+static struct resource *
+ixp425_alloc_resource(device_t dev, device_t child, int type, int *rid,
+    u_long start, u_long end, u_long count, u_int flags)
+{
+	struct ixp425_softc *sc = device_get_softc(dev);
+	struct rman *rmanp;
+	struct resource *rv;
+	uint32_t vbase;
+	int isuart = (start == 0 && end == ~0);	/* XXX how to do this right? */
+
+	rv = NULL;
+
+	switch (type) {
+	case SYS_RES_IRQ:
+		rmanp = &sc->sc_irq_rman;
+		if (isuart) {
+			if (device_get_unit(dev) == 0) 
+				start = IXP425_INT_UART0;
+			else
+				start = IXP425_INT_UART1;
+			end = start;
+		}
+		break;
+
+	case SYS_RES_MEMORY:
+		rmanp = &sc->sc_mem_rman;
+		if (isuart) {
+			if (device_get_unit(dev) == 0) 
+				start = IXP425_UART0_HWBASE;
+			else
+				start = IXP425_UART1_HWBASE;
+			end = start + 0x1000;
+		}
+		if (getvbase(start, end - start, &vbase))
+			return (rv);
+		break;
+
+	default:
+		return (rv);
+	}
+
+	rv = rman_reserve_resource(rmanp, start, end, count, flags, child);
+	if (rv != NULL) {
+		rman_set_rid(rv, *rid);
+		if (type == SYS_RES_MEMORY) {
+			rman_set_bustag(rv,
+			    isuart ? &ixp425_a4x_bs_tag : sc->sc_iot);
+			rman_set_bushandle(rv, vbase);
+		}
+	}
+
+	return (rv);
+}
+
+static int
+ixp425_setup_intr(device_t dev, device_t child,
+    struct resource *ires, int flags, driver_intr_t *intr, void *arg,
+    void **cookiep)
+{
+	uint32_t mask;
+	int i;
+
+	if (flags & INTR_TYPE_TTY) {
+		/* XXX: wrong. */
+		if (device_get_unit(dev) == 0)
+			rman_set_start(ires, IXP425_INT_UART0);
+		else
+			rman_set_start(ires, IXP425_INT_UART1);
+		rman_set_end(ires, rman_get_start(ires));
+	}
+	BUS_SETUP_INTR(device_get_parent(dev), child, ires, flags, intr, arg,
+	    cookiep);
+
+	mask = 0;
+	for (i = rman_get_start(ires); i <= rman_get_end(ires); i++)
+		mask |= 1 << i;
+	intr_enabled |= mask;
+	ixp425_set_intrmask();
+
+	return (0);
+}
+
+static int
+ixp425_teardown_intr(device_t dev, device_t child, struct resource *res,
+    void *cookie)
+{
+	uint32_t mask;
+	int i;
+
+	mask = 0;
+	for (i = rman_get_start(res); i <= rman_get_end(res); i++)
+		mask |= 1 << i;
+	intr_enabled &= ~mask;
+	ixp425_set_intrmask();
+
+	return (BUS_TEARDOWN_INTR(device_get_parent(dev), child, res, cookie));
+}
+
+static device_method_t ixp425_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_probe, ixp425_probe),
+	DEVMETHOD(device_attach, ixp425_attach),
+	DEVMETHOD(device_identify, ixp425_identify),
+
+	/* Bus interface */
+	DEVMETHOD(bus_alloc_resource, ixp425_alloc_resource),
+	DEVMETHOD(bus_setup_intr, ixp425_setup_intr),
+	DEVMETHOD(bus_teardown_intr, ixp425_teardown_intr),
+
+	{0, 0},
+};
+
+static driver_t ixp425_driver = {
+	"ixp",
+	ixp425_methods,
+	sizeof(struct ixp425_softc),
+};
+static devclass_t ixp425_devclass;
+
+DRIVER_MODULE(ixp, nexus, ixp425_driver, ixp425_devclass, 0, 0);
diff --git a/sys/arm/xscale/ixp425/ixp425_a4x_io.S b/sys/arm/xscale/ixp425/ixp425_a4x_io.S
new file mode 100644
index 000000000000..22ab1b3479b4
--- /dev/null
+++ b/sys/arm/xscale/ixp425/ixp425_a4x_io.S
@@ -0,0 +1,142 @@
+/*	$NetBSD: ixp425_a4x_io.S,v 1.2 2005/12/11 12:16:51 christos Exp $	*/
+
+/*
+ * Copyright 2003 Wasabi Systems, Inc.
+ * All rights reserved.
+ *
+ * Written by Steve C. Woodford for Wasabi Systems, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed for the NetBSD Project by
+ *      Wasabi Systems, Inc.
+ * 4. The name of Wasabi Systems, Inc. may not be used to endorse
+ *    or promote products derived from this software without specific prior
+ *    written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*	
+ * There are simple bus space functions for IO registers mapped at
+ * 32-bit aligned positions.  offset is multiplied by 4.  
+ *
+ * Based loosely on pxa2x0_a2x_io.S
+ */
+
+#include <machine/asm.h>
+__FBSDID("$FreeBSD$");
+
+/*
+ * bus_space I/O functions with offset*4
+ */
+
+/*
+ * Read single
+ */
+ENTRY(a4x_bs_r_1)
+	ldr	r0, [r1, r2, LSL #2]
+	and	r0, r0, #0xff
+	mov	pc, lr
+
+ENTRY(a4x_bs_r_2)
+	ldr	r0, [r1, r2, LSL #2]
+	mov	r1, #0xff
+	orr	r1, r1, r1, lsl #8
+	and	r0, r0, r1
+	mov	pc, lr
+
+ENTRY(a4x_bs_r_4)
+	ldr	r0, [r1, r2, LSL #2]
+	mov	pc, lr
+
+/*
+ * Write single
+ */
+ENTRY(a4x_bs_w_1)
+	and	r3, r3, #0xff
+	str	r3, [r1, r2, LSL #2]
+	mov	pc, lr
+
+ENTRY(a4x_bs_w_2)
+	mov	r0, #0xff
+	orr	r0, r0, r0, lsl #8
+	and	r3, r3, r0
+	str	r3, [r1, r2, LSL #2]
+	mov	pc, lr
+
+ENTRY(a4x_bs_w_4)
+	str	r3, [r1, r2, LSL #2]
+	mov	pc, lr
+
+/*
+ * Read multiple
+ */
+ENTRY(a4x_bs_rm_1)
+	add	r0, r1, r2, lsl #2
+	ldr	r2, [sp, #0]
+	mov	r1, r3
+	teq	r2, #0
+	moveq	pc, lr
+1:	ldr	r3, [r0]
+	subs	r2, r2, #1
+	strb	r3, [r1], #1
+	bne	1b
+	mov	pc, lr
+
+ENTRY(a4x_bs_rm_2)
+	add	r0, r1, r2, lsl #2
+	ldr	r2, [sp, #0]
+	mov	r1, r3
+	teq	r2, #0
+	moveq	pc, lr
+1:	ldr	r3, [r0]
+	subs	r2, r2, #1
+	strh	r3, [r1], #2
+	bne	1b
+	mov	pc, lr
+
+/*
+ * Write multiple
+ */
+ENTRY(a4x_bs_wm_1)
+	add	r0, r1, r2, lsl #2
+	ldr	r2, [sp, #0]
+	mov	r1, r3
+	teq	r2, #0
+	moveq	pc, lr
+1:	ldrb	r3, [r1], #1
+	subs	r2, r2, #1
+	str	r3, [r0]
+	bne	1b
+	mov	pc, lr
+
+ENTRY(a4x_bs_wm_2)
+	add	r0, r1, r2, lsl #2
+	ldr	r2, [sp, #0]
+	mov	r1, r3
+	teq	r2, #0
+	moveq	pc, lr
+1:	ldrh	r3, [r1], #2
+	subs	r2, r2, #1
+	str	r3, [r0]
+	bne	1b
+	mov	pc, lr
diff --git a/sys/arm/xscale/ixp425/ixp425_a4x_space.c b/sys/arm/xscale/ixp425/ixp425_a4x_space.c
new file mode 100644
index 000000000000..1a6e28fd50ea
--- /dev/null
+++ b/sys/arm/xscale/ixp425/ixp425_a4x_space.c
@@ -0,0 +1,116 @@
+/*	$NetBSD: ixp425_a4x_space.c,v 1.2 2005/12/11 12:16:51 christos Exp $	*/
+
+/*
+ * Copyright 2003 Wasabi Systems, Inc.
+ * All rights reserved.
+ *
+ * Written by Steve C. Woodford for Wasabi Systems, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed for the NetBSD Project by
+ *      Wasabi Systems, Inc.
+ * 4. The name of Wasabi Systems, Inc. may not be used to endorse
+ *    or promote products derived from this software without specific prior
+ *    written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * Bus space tag for 8/16-bit devices on 32-bit bus.
+ * all registers are located at the address of multiple of 4.
+ *
+ * Based on pxa2x0_a4x_space.c
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+
+#include <machine/pcb.h>
+
+#include <vm/vm.h>
+#include <vm/vm_kern.h>
+#include <vm/pmap.h>
+#include <vm/vm_page.h>
+#include <vm/vm_extern.h>
+
+#include <machine/bus.h>
+
+/* Prototypes for all the bus_space structure functions */
+bs_protos(ixp425);
+bs_protos(a4x);
+bs_protos(generic);
+bs_protos(generic_armv4);
+
+struct bus_space ixp425_a4x_bs_tag = {
+	/* cookie */
+	.bs_cookie	= (void *) 0,
+
+	/* mapping/unmapping */
+	.bs_map		= ixp425_bs_map,
+	.bs_unmap	= ixp425_bs_unmap,
+	.bs_subregion	= ixp425_bs_subregion,
+
+	/* allocation/deallocation */
+	.bs_alloc	= ixp425_bs_alloc,	/* XXX not implemented */
+	.bs_free	= ixp425_bs_free,	/* XXX not implemented */
+
+	/* barrier */
+	.bs_barrier	= ixp425_bs_barrier,
+
+	/* read (single) */
+	.bs_r_1		= a4x_bs_r_1,
+	.bs_r_2		= a4x_bs_r_2,
+	.bs_r_4		= a4x_bs_r_4,
+
+	/* read multiple */
+	.bs_rm_1	= a4x_bs_rm_1,
+	.bs_rm_2	= a4x_bs_rm_2,
+
+	/* read region */
+	/* XXX not implemented */
+
+	/* write (single) */
+	.bs_w_1		= a4x_bs_w_1,
+	.bs_w_2		= a4x_bs_w_2,
+	.bs_w_4		= a4x_bs_w_4,
+
+	/* write multiple */
+	.bs_wm_1	= a4x_bs_wm_1,
+	.bs_wm_2	= a4x_bs_wm_2,
+
+	/* write region */
+	/* XXX not implemented */
+
+	/* set multiple */
+	/* XXX not implemented */
+
+	/* set region */
+	/* XXX not implemented */
+
+	/* copy */
+	/* XXX not implemented */
+};
diff --git a/sys/arm/xscale/ixp425/ixp425_iic.c b/sys/arm/xscale/ixp425/ixp425_iic.c
new file mode 100644
index 000000000000..9f8e35dd07d6
--- /dev/null
+++ b/sys/arm/xscale/ixp425/ixp425_iic.c
@@ -0,0 +1,193 @@
+/*
+ * Copyright (c) 2006 Kevin Lo. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed for the NetBSD Project by
+ *      Wasabi Systems, Inc.
+ * 4. The name of Wasabi Systems, Inc. may not be used to endorse
+ *    or promote products derived from this software without specific prior
+ *    written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/bus.h>
+#include <sys/uio.h>
+
+#include <arm/xscale/ixp425/ixp425reg.h>
+#include <arm/xscale/ixp425/ixp425var.h>
+#include <arm/xscale/ixp425/ixdp425reg.h>
+
+#include <dev/iicbus/iiconf.h>
+#include <dev/iicbus/iicbus.h>
+
+#include "iicbb_if.h"
+
+#define I2C_DELAY	10
+
+/* bit clr/set shorthands */
+#define	GPIO_CONF_CLR(sc, reg, mask)	\
+	GPIO_CONF_WRITE_4(sc, reg, GPIO_CONF_READ_4(sc, reg) &~ (mask))
+#define	GPIO_CONF_SET(sc, reg, mask)	\
+	GPIO_CONF_WRITE_4(sc, reg, GPIO_CONF_READ_4(sc, reg) | (mask))
+
+struct ixpiic_softc {
+	device_t		sc_dev;
+	bus_space_tag_t		sc_iot;
+	bus_space_handle_t	sc_gpio_ioh;
+
+	device_t		iicbb;
+};
+
+static struct ixpiic_softc *ixpiic_sc = NULL;
+
+static int
+ixpiic_probe(device_t dev)
+{
+	device_set_desc(dev, "IXP425 GPIO-Based I2C Interface");
+	return (0);
+}
+
+static int
+ixpiic_attach(device_t dev)
+{
+	struct ixpiic_softc *sc = device_get_softc(dev);
+	struct ixp425_softc *sa = device_get_softc(device_get_parent(dev));
+
+	ixpiic_sc = sc;
+
+	sc->sc_dev = dev;
+	sc->sc_iot = sa->sc_iot;
+	sc->sc_gpio_ioh = sa->sc_gpio_ioh;
+
+	GPIO_CONF_SET(sc, IXP425_GPIO_GPOER,
+		GPIO_I2C_SCL_BIT | GPIO_I2C_SDA_BIT);
+	GPIO_CONF_CLR(sc, IXP425_GPIO_GPOUTR,
+		GPIO_I2C_SCL_BIT | GPIO_I2C_SDA_BIT);
+
+	/* add generic bit-banging code */	
+	if ((sc->iicbb = device_add_child(dev, "iicbb", -1)) == NULL)
+		device_printf(dev, "could not add iicbb\n");
+
+	/* probe and attach the bit-banging code */
+	device_probe_and_attach(sc->iicbb);
+
+	return (0);
+}
+
+static int
+ixpiic_callback(device_t dev, int index, caddr_t *data)
+{
+	return (0);
+}
+
+static int 
+ixpiic_getscl(device_t dev)
+{
+	struct ixpiic_softc *sc = ixpiic_sc;
+	uint32_t reg;
+
+	GPIO_CONF_SET(sc, IXP425_GPIO_GPOER, GPIO_I2C_SCL_BIT);
+
+	reg = GPIO_CONF_READ_4(sc, IXP425_GPIO_GPINR);
+	return (reg & GPIO_I2C_SCL_BIT);
+}
+
+static int 
+ixpiic_getsda(device_t dev)
+{
+	struct ixpiic_softc *sc = ixpiic_sc;
+	uint32_t reg;
+
+	GPIO_CONF_SET(sc, IXP425_GPIO_GPOER, GPIO_I2C_SDA_BIT);
+
+	reg = GPIO_CONF_READ_4(sc, IXP425_GPIO_GPINR);
+	return (reg & GPIO_I2C_SDA_BIT);
+}
+
+static void 
+ixpiic_setsda(device_t dev, char val)
+{
+	struct ixpiic_softc *sc = ixpiic_sc;
+
+	GPIO_CONF_CLR(sc, IXP425_GPIO_GPOUTR, GPIO_I2C_SDA_BIT);
+	if (val)
+		GPIO_CONF_SET(sc, IXP425_GPIO_GPOER, GPIO_I2C_SDA_BIT);
+	else
+		GPIO_CONF_CLR(sc, IXP425_GPIO_GPOER, GPIO_I2C_SDA_BIT);
+	DELAY(I2C_DELAY);
+}
+
+static void 
+ixpiic_setscl(device_t dev, char val)
+{
+	struct ixpiic_softc *sc = ixpiic_sc;
+
+	GPIO_CONF_CLR(sc, IXP425_GPIO_GPOUTR, GPIO_I2C_SCL_BIT);
+	if (val)
+		GPIO_CONF_SET(sc, IXP425_GPIO_GPOER, GPIO_I2C_SCL_BIT);
+	else
+		GPIO_CONF_CLR(sc, IXP425_GPIO_GPOER, GPIO_I2C_SCL_BIT);
+	DELAY(I2C_DELAY);
+}
+
+static int
+ixpiic_reset(device_t dev, u_char speed, u_char addr, u_char *oldaddr)
+{
+	/* reset bus */
+	ixpiic_setsda(dev, 1);
+	ixpiic_setscl(dev, 1);
+
+	return (IIC_ENOADDR);
+}
+
+static device_method_t ixpiic_methods[] = {
+	/* device interface */
+	DEVMETHOD(device_probe,		ixpiic_probe),
+	DEVMETHOD(device_attach,	ixpiic_attach),
+
+	/* iicbb interface */
+	DEVMETHOD(iicbb_callback,	ixpiic_callback),
+	DEVMETHOD(iicbb_setsda,		ixpiic_setsda),
+	DEVMETHOD(iicbb_setscl,		ixpiic_setscl),
+	DEVMETHOD(iicbb_getsda,		ixpiic_getsda),
+	DEVMETHOD(iicbb_getscl,		ixpiic_getscl),
+	DEVMETHOD(iicbb_reset,		ixpiic_reset),
+
+	{ 0, 0 }
+};
+
+static driver_t ixpiic_driver = {
+	"ixpiic",
+	ixpiic_methods,
+	sizeof(struct ixpiic_softc),
+};
+static devclass_t ixpiic_devclass;
+
+DRIVER_MODULE(ixpiic, ixp, ixpiic_driver, ixpiic_devclass, 0, 0);
diff --git a/sys/arm/xscale/ixp425/ixp425_intr.h b/sys/arm/xscale/ixp425/ixp425_intr.h
new file mode 100644
index 000000000000..27217f467502
--- /dev/null
+++ b/sys/arm/xscale/ixp425/ixp425_intr.h
@@ -0,0 +1,149 @@
+/*	$NetBSD: ixp425_intr.h,v 1.6 2005/12/24 20:06:52 perry Exp $	*/
+
+/*
+ * Copyright (c) 2001, 2002 Wasabi Systems, Inc.
+ * All rights reserved.
+ *
+ * Written by Jason R. Thorpe for Wasabi Systems, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed for the NetBSD Project by
+ *	Wasabi Systems, Inc.
+ * 4. The name of Wasabi Systems, Inc. may not be used to endorse
+ *    or promote products derived from this software without specific prior
+ *    written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ *
+ */
+
+#ifndef _IXP425_INTR_H_
+#define _IXP425_INTR_H_
+
+#define	ARM_IRQ_HANDLER	_C_LABEL(ixp425_intr_dispatch)
+
+#ifndef _LOCORE
+
+#include <machine/armreg.h>
+#include <machine/cpufunc.h>
+
+#include <arm/xscale/ixp425/ixp425reg.h>
+
+#define IXPREG(reg)     *((__volatile u_int32_t*) (reg))
+
+void ixp425_do_pending(void);
+
+extern __volatile uint32_t intr_enabled;
+extern uint32_t intr_steer;
+
+static __inline void __attribute__((__unused__))
+ixp425_set_intrmask(void)
+{
+	IXPREG(IXP425_INT_ENABLE) = intr_enabled & IXP425_INT_HWMASK;
+}
+
+static __inline void
+ixp425_set_intrsteer(void)
+{
+	IXPREG(IXP425_INT_SELECT) = intr_steer & IXP425_INT_HWMASK;
+}
+
+#define INT_SWMASK						\
+	((1U << IXP425_INT_bit31) | (1U << IXP425_INT_bit30) |	\
+	 (1U << IXP425_INT_bit14) | (1U << IXP425_INT_bit11))
+
+#if 0
+static __inline void __attribute__((__unused__))
+ixp425_splx(int new)
+{
+	extern __volatile uint32_t intr_enabled;
+	extern __volatile int current_spl_level;
+	extern __volatile int ixp425_ipending;
+	extern void ixp425_do_pending(void);
+	int oldirqstate, hwpend;
+
+	/* Don't let the compiler re-order this code with preceding code */
+	__insn_barrier();
+
+	current_spl_level = new;
+
+	hwpend = (ixp425_ipending & IXP425_INT_HWMASK) & ~new;
+	if (hwpend != 0) {
+		oldirqstate = disable_interrupts(I32_bit);
+		intr_enabled |= hwpend;
+		ixp425_set_intrmask();
+		restore_interrupts(oldirqstate);
+	}
+
+	if ((ixp425_ipending & INT_SWMASK) & ~new)
+		ixp425_do_pending();
+}
+
+static __inline int __attribute__((__unused__))
+ixp425_splraise(int ipl)
+{
+	extern __volatile int current_spl_level;
+	extern int ixp425_imask[];
+	int	old;
+
+	old = current_spl_level;
+	current_spl_level |= ixp425_imask[ipl];
+
+	/* Don't let the compiler re-order this code with subsequent code */
+	__insn_barrier();
+
+	return (old);
+}
+
+static __inline int __attribute__((__unused__))
+ixp425_spllower(int ipl)
+{
+	extern __volatile int current_spl_level;
+	extern int ixp425_imask[];
+	int old = current_spl_level;
+
+	ixp425_splx(ixp425_imask[ipl]);
+	return(old);
+}
+
+#endif
+#if !defined(EVBARM_SPL_NOINLINE)
+
+#define splx(new)		ixp425_splx(new)
+#define	_spllower(ipl)		ixp425_spllower(ipl)
+#define	_splraise(ipl)		ixp425_splraise(ipl)
+void	_setsoftintr(int);
+
+#else
+
+int	_splraise(int);
+int	_spllower(int);
+void	splx(int);
+void	_setsoftintr(int);
+
+#endif /* ! EVBARM_SPL_NOINLINE */
+
+#endif /* _LOCORE */
+
+#endif /* _IXP425_INTR_H_ */
diff --git a/sys/arm/xscale/ixp425/ixp425_mem.c b/sys/arm/xscale/ixp425/ixp425_mem.c
new file mode 100644
index 000000000000..df7f7e550545
--- /dev/null
+++ b/sys/arm/xscale/ixp425/ixp425_mem.c
@@ -0,0 +1,85 @@
+/*	$NetBSD: ixp425_mem.c,v 1.2 2005/12/11 12:16:51 christos Exp $	*/
+
+/*
+ * Copyright (c) 2003 Wasabi Systems, Inc.
+ * All rights reserved.
+ *
+ * Written by Steve C. Woodford for Wasabi Systems, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed for the NetBSD Project by
+ *      Wasabi Systems, Inc.
+ * 4. The name of Wasabi Systems, Inc. may not be used to endorse
+ *    or promote products derived from this software without specific prior
+ *    written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+
+#include <arm/xscale/ixp425/ixp425reg.h>
+#include <arm/xscale/ixp425/ixp425var.h>
+
+static uint32_t sdram_64bit[] = {
+	0x00800000,	/* 8M:  One 2M x 32 chip */
+	0x01000000,	/* 16M: Two 2M x 32 chips */
+	0x01000000,	/* 16M: One 4M x 32 chip */
+	0x02000000,	/* 32M: Two 4M x 32 chips */
+	0, 0, 0, 0
+};
+
+static uint32_t sdram_other[] = {
+	0x02000000,	/*  32M: Two   8M x 16 chips */
+	0x04000000,	/*  64M: Four  8M x 16 chips */
+	0x04000000,	/*  64M: Two  16M x 16 chips */
+	0x08000000,	/* 128M: Four 16M x 16 chips */
+	0x08000000,	/* 128M: Two  32M x 16 chips */
+	0x10000000,	/* 256M: Four 32M x 16 chips */
+	0, 0
+};
+
+#define MCU_REG_READ(x)	(*(volatile uint32_t *)(IXP425_MCU_VBASE + (x)))
+
+uint32_t
+ixp425_sdram_size(void)
+{
+	uint32_t size, sdr_config;
+
+	sdr_config = MCU_REG_READ(MCU_SDR_CONFIG);
+
+	if (sdr_config & MCU_SDR_CONFIG_64MBIT)
+		size = sdram_64bit[MCU_SDR_CONFIG_MCONF(sdr_config)];
+	else
+		size = sdram_other[MCU_SDR_CONFIG_MCONF(sdr_config)];
+
+	if (size == 0) {
+		printf("** SDR_CONFIG retuns unknown value, using 32M\n");
+		size = 32 * 1024 * 1024;
+	}
+
+	return (size);
+}
diff --git a/sys/arm/xscale/ixp425/ixp425_npe.c b/sys/arm/xscale/ixp425/ixp425_npe.c
new file mode 100644
index 000000000000..0d1626ba3fc0
--- /dev/null
+++ b/sys/arm/xscale/ixp425/ixp425_npe.c
@@ -0,0 +1,1396 @@
+/*-
+ * Copyright (c) 2006 Sam Leffler, Errno Consulting
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
+ *    redistribution must be conditioned upon including a substantially
+ *    similar Disclaimer requirement for further binary redistribution.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
+ * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+ * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGES.
+ */
+
+/*-
+ * Copyright (c) 2001-2005, Intel Corporation.
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Intel Corporation nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+*/
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+/*
+ * Intel XScale Network Processing Engine (NPE) support.
+ *
+ * Each NPE has an ixpnpeX device associated with it that is
+ * attached at boot.  Depending on the microcode loaded into
+ * an NPE there may be an Ethernet interface (npeX) or some
+ * other network interface (e.g. for ATM).  This file has support
+ * for loading microcode images and the associated NPE CPU
+ * manipulations (start, stop, reset).
+ *
+ * The code here basically replaces the npeDl and npeMh classes
+ * in the Intel Access Library (IAL).
+ *
+ * NB: Microcode images are loaded with firmware(9).  To
+ *     include microcode in a static kernel include the
+ *     ixpnpe_fw device.  Otherwise the firmware will be
+ *     automatically loaded from the filesystem.
+ */
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+#include <sys/module.h>
+#include <sys/time.h>
+#include <sys/bus.h>
+#include <sys/resource.h>
+#include <sys/rman.h>
+#include <sys/sysctl.h>
+
+#include <sys/linker.h>
+#include <sys/firmware.h>
+
+#include <machine/bus.h>
+#include <machine/cpu.h>
+#include <machine/cpufunc.h>
+#include <machine/resource.h>
+#include <machine/intr.h>
+#include <arm/xscale/ixp425/ixp425reg.h>
+#include <arm/xscale/ixp425/ixp425var.h>
+
+#include <arm/xscale/ixp425/ixp425_npereg.h>
+#include <arm/xscale/ixp425/ixp425_npevar.h>
+
+struct ixpnpe_softc {
+    device_t		sc_dev;
+    bus_space_tag_t	sc_iot;
+    bus_space_handle_t	sc_ioh;
+    bus_size_t		sc_size;	/* size of mapped register window */
+    struct resource	*sc_irq;	/* IRQ resource */
+    void		*sc_ih;		/* interrupt handler */
+    struct mtx		sc_mtx;		/* mailbox lock */
+    uint32_t		sc_msg[2];	/* reply msg collected in ixpnpe_intr */
+    int			sc_msgwaiting;	/* sc_msg holds valid data */
+
+    int			validImage;	/* valid ucode image loaded */
+    int			started;	/* NPE is started */
+    uint8_t		functionalityId;/* ucode functionality ID */
+    int			insMemSize;	/* size of instruction memory */
+    int			dataMemSize;	/* size of data memory */
+    uint32_t		savedExecCount;
+    uint32_t		savedEcsDbgCtxtReg2;
+};
+
+#define	IX_NPEDL_NPEIMAGE_FIELD_MASK	0xff
+
+/* used to read download map from version in microcode image */
+#define IX_NPEDL_BLOCK_TYPE_INSTRUCTION	0x00000000
+#define IX_NPEDL_BLOCK_TYPE_DATA	0x00000001
+#define IX_NPEDL_BLOCK_TYPE_STATE	0x00000002
+#define IX_NPEDL_END_OF_DOWNLOAD_MAP	0x0000000F
+
+/*
+ * masks used to extract address info from State information context
+ * register addresses as read from microcode image 
+ */
+#define IX_NPEDL_MASK_STATE_ADDR_CTXT_REG         0x0000000F
+#define IX_NPEDL_MASK_STATE_ADDR_CTXT_NUM         0x000000F0
+
+/* LSB offset of Context Number field in State-Info Context Address */
+#define IX_NPEDL_OFFSET_STATE_ADDR_CTXT_NUM       4
+
+/* size (in words) of single State Information entry (ctxt reg address|data) */
+#define IX_NPEDL_STATE_INFO_ENTRY_SIZE	2
+
+typedef struct {
+    uint32_t type;
+    uint32_t offset;
+} IxNpeDlNpeMgrDownloadMapBlockEntry;
+
+typedef union {
+    IxNpeDlNpeMgrDownloadMapBlockEntry block;
+    uint32_t eodmMarker;
+} IxNpeDlNpeMgrDownloadMapEntry;
+
+typedef struct {
+    /* 1st entry in the download map (there may be more than one) */
+    IxNpeDlNpeMgrDownloadMapEntry entry[1];
+} IxNpeDlNpeMgrDownloadMap;
+
+/* used to access an instruction or data block in a microcode image */
+typedef struct {
+    uint32_t npeMemAddress;
+    uint32_t size;
+    uint32_t data[1];
+} IxNpeDlNpeMgrCodeBlock;
+
+/* used to access each Context Reg entry state-information block */
+typedef struct {
+    uint32_t addressInfo;
+    uint32_t value;
+} IxNpeDlNpeMgrStateInfoCtxtRegEntry;
+
+/* used to access a state-information block in a microcode image */
+typedef struct {
+    uint32_t size;
+    IxNpeDlNpeMgrStateInfoCtxtRegEntry ctxtRegEntry[1];
+} IxNpeDlNpeMgrStateInfoBlock;
+
+static int npe_debug = 0;
+SYSCTL_INT(_debug, OID_AUTO, ixp425npe, CTLFLAG_RW, &npe_debug,
+	   0, "IXP425 NPE debug msgs");
+TUNABLE_INT("debug.ixp425npe", &npe_debug);
+#define	DPRINTF(dev, fmt, ...) do {					\
+	if (npe_debug) device_printf(dev, fmt, __VA_ARGS__);		\
+} while (0)
+#define	DPRINTFn(n, dev, fmt, ...) do {					\
+	if (npe_debug >= n) printf(fmt, __VA_ARGS__);			\
+} while (0)
+
+static int npe_checkbits(struct ixpnpe_softc *, uint32_t reg, uint32_t);
+static int npe_isstopped(struct ixpnpe_softc *);
+static int npe_load_ins(struct ixpnpe_softc *,
+		const IxNpeDlNpeMgrCodeBlock *bp, int verify);
+static int npe_load_data(struct ixpnpe_softc *,
+		const IxNpeDlNpeMgrCodeBlock *bp, int verify);
+static int npe_load_stateinfo(struct ixpnpe_softc *,
+		const IxNpeDlNpeMgrStateInfoBlock *bp, int verify);
+static int npe_load_image(struct ixpnpe_softc *,
+		const uint32_t *imageCodePtr, int verify);
+static int npe_cpu_reset(struct ixpnpe_softc *);
+static int npe_cpu_start(struct ixpnpe_softc *);
+static int npe_cpu_stop(struct ixpnpe_softc *);
+static void npe_cmd_issue_write(struct ixpnpe_softc *,
+		uint32_t cmd, uint32_t addr, uint32_t data);
+static uint32_t npe_cmd_issue_read(struct ixpnpe_softc *,
+		uint32_t cmd, uint32_t addr);
+static int npe_ins_write(struct ixpnpe_softc *,
+		uint32_t addr, uint32_t data, int verify);
+static int npe_data_write(struct ixpnpe_softc *,
+		uint32_t addr, uint32_t data, int verify);
+static void npe_ecs_reg_write(struct ixpnpe_softc *,
+		uint32_t reg, uint32_t data);
+static uint32_t npe_ecs_reg_read(struct ixpnpe_softc *, uint32_t reg);
+static void npe_issue_cmd(struct ixpnpe_softc *, uint32_t command);
+static void npe_cpu_step_save(struct ixpnpe_softc *);
+static int npe_cpu_step(struct ixpnpe_softc *, uint32_t npeInstruction,
+		uint32_t ctxtNum, uint32_t ldur);
+static void npe_cpu_step_restore(struct ixpnpe_softc *);
+static int npe_logical_reg_read(struct ixpnpe_softc *,
+		uint32_t regAddr, uint32_t regSize,
+		uint32_t ctxtNum, uint32_t *regVal);
+static int npe_logical_reg_write(struct ixpnpe_softc *,
+		uint32_t regAddr, uint32_t regVal,
+		uint32_t regSize, uint32_t ctxtNum, int verify);
+static int npe_physical_reg_write(struct ixpnpe_softc *,
+		uint32_t regAddr, uint32_t regValue, int verify);
+static int npe_ctx_reg_write(struct ixpnpe_softc *, uint32_t ctxtNum,
+		uint32_t ctxtReg, uint32_t ctxtRegVal, int verify);
+
+static void ixpnpe_intr(void *arg);
+
+static uint32_t
+npe_reg_read(struct ixpnpe_softc *sc, bus_size_t off)
+{
+    uint32_t v = bus_space_read_4(sc->sc_iot, sc->sc_ioh, off);
+    DPRINTFn(9, sc->sc_dev, "%s(0x%lx) => 0x%x\n", __func__, off, v);
+    return v;
+}
+
+static void
+npe_reg_write(struct ixpnpe_softc *sc, bus_size_t off, uint32_t val)
+{
+    DPRINTFn(9, sc->sc_dev, "%s(0x%lx, 0x%x)\n", __func__, off, val);
+    bus_space_write_4(sc->sc_iot, sc->sc_ioh, off, val);
+}
+
+struct ixpnpe_softc *
+ixpnpe_attach(device_t dev)
+{
+    struct ixp425_softc *sa = device_get_softc(device_get_parent(dev));
+    struct ixpnpe_softc *sc;
+    bus_addr_t base;
+    int rid, irq;
+
+    /* XXX M_BUS */
+    sc = malloc(sizeof(struct ixpnpe_softc), M_TEMP, M_WAITOK | M_ZERO);
+    sc->sc_dev = dev;
+    sc->sc_iot = sa->sc_iot;
+    mtx_init(&sc->sc_mtx, device_get_nameunit(dev), "npe driver", MTX_DEF);
+
+    if (device_get_unit(dev) == 0) {
+	base = IXP425_NPE_B_HWBASE;
+	sc->sc_size = IXP425_NPE_B_SIZE;
+	irq = IXP425_INT_NPE_B;
+
+	/* size of instruction memory */
+	sc->insMemSize = IX_NPEDL_INS_MEMSIZE_WORDS_NPEB;
+	/* size of data memory */
+	sc->dataMemSize = IX_NPEDL_DATA_MEMSIZE_WORDS_NPEB;
+    } else {
+	base = IXP425_NPE_C_HWBASE;
+	sc->sc_size = IXP425_NPE_C_SIZE;
+	irq = IXP425_INT_NPE_C;
+
+	/* size of instruction memory */
+	sc->insMemSize = IX_NPEDL_INS_MEMSIZE_WORDS_NPEC;
+	/* size of data memory */
+	sc->dataMemSize = IX_NPEDL_DATA_MEMSIZE_WORDS_NPEC;
+    }
+    if (bus_space_map(sc->sc_iot, base, sc->sc_size, 0, &sc->sc_ioh))
+	panic("%s: Cannot map registers", device_get_name(dev));
+
+    /*
+     * Setup IRQ and handler for NPE message support.
+     */
+    rid = 0;
+    sc->sc_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid,
+	irq, irq, 1, RF_ACTIVE);
+    if (!sc->sc_irq)
+	panic("%s: Unable to allocate irq %u", device_get_name(dev), irq);
+    /* XXX could be a source of entropy */
+    bus_setup_intr(dev, sc->sc_irq, INTR_TYPE_NET | INTR_MPSAFE,
+	ixpnpe_intr, sc, &sc->sc_ih);
+    /* enable output fifo interrupts (NB: must also set OFIFO Write Enable) */ 
+    npe_reg_write(sc, IX_NPECTL,
+	npe_reg_read(sc, IX_NPECTL) | (IX_NPECTL_OFE | IX_NPECTL_OFWE));
+
+    return sc;
+}
+
+void
+ixpnpe_detach(struct ixpnpe_softc *sc)
+{
+    /* disable output fifo interrupts */ 
+    npe_reg_write(sc, IX_NPECTL,
+	npe_reg_read(sc, IX_NPECTL) &~ (IX_NPECTL_OFE | IX_NPECTL_OFWE));
+
+    bus_teardown_intr(sc->sc_dev, sc->sc_irq, sc->sc_ih);
+    bus_space_unmap(sc->sc_iot, sc->sc_ioh, sc->sc_size);
+    mtx_destroy(&sc->sc_mtx);
+    free(sc, M_TEMP);
+}
+
+int
+ixpnpe_stopandreset(struct ixpnpe_softc *sc)
+{
+    int error;
+
+    mtx_lock(&sc->sc_mtx);
+    error = npe_cpu_stop(sc);		/* stop NPE */
+    if (error == 0)
+	error = npe_cpu_reset(sc);	/* reset it */
+    if (error == 0)
+	sc->started = 0;		/* mark stopped */
+    mtx_unlock(&sc->sc_mtx);
+
+    DPRINTF(sc->sc_dev, "%s: error %d\n", __func__, error);
+    return error;
+}
+
+static int
+ixpnpe_start_locked(struct ixpnpe_softc *sc)
+{
+    int error;
+
+    if (!sc->started) {
+	error = npe_cpu_start(sc);
+	if (error == 0)
+	    sc->started = 1;
+    } else
+	error = 0;
+
+    DPRINTF(sc->sc_dev, "%s: error %d\n", __func__, error);
+    return error;
+}
+
+int
+ixpnpe_start(struct ixpnpe_softc *sc)
+{
+	int ret;
+
+	mtx_lock(&sc->sc_mtx);
+	ret = ixpnpe_start_locked(sc);
+	mtx_unlock(&sc->sc_mtx);
+	return (ret);
+}
+
+int
+ixpnpe_stop(struct ixpnpe_softc *sc)
+{
+    int error;
+
+    mtx_lock(&sc->sc_mtx);
+    error = npe_cpu_stop(sc);
+    if (error == 0)
+	sc->started = 0;
+    mtx_unlock(&sc->sc_mtx);
+
+    DPRINTF(sc->sc_dev, "%s: error %d\n", __func__, error);
+    return error;
+}
+
+/*
+ * Indicates the start of an NPE Image, in new NPE Image Library format.
+ * 2 consecutive occurances indicates the end of the NPE Image Library
+ */
+#define NPE_IMAGE_MARKER 0xfeedf00d
+
+/*
+ * NPE Image Header definition, used in new NPE Image Library format
+ */
+typedef struct {
+    uint32_t marker;
+    uint32_t id;
+    uint32_t size;
+} IxNpeDlImageMgrImageHeader;
+
+static int
+npe_findimage(struct ixpnpe_softc *sc,
+    const uint32_t *imageLibrary, uint32_t imageId,
+    const uint32_t **imagePtr, uint32_t *imageSize)
+{
+    const IxNpeDlImageMgrImageHeader *image;
+    uint32_t offset = 0;
+
+    while (imageLibrary[offset] == NPE_IMAGE_MARKER) {
+        image = (const IxNpeDlImageMgrImageHeader *)&imageLibrary[offset];
+        offset += sizeof(IxNpeDlImageMgrImageHeader)/sizeof(uint32_t);
+        
+        DPRINTF(sc->sc_dev, "%s: off %u mark 0x%x id 0x%x size %u\n",
+	    __func__, offset, image->marker, image->id, image->size);
+        if (image->id == imageId) {
+            *imagePtr = imageLibrary + offset;
+            *imageSize = image->size;
+            return 0;
+        }
+        /* 2 consecutive NPE_IMAGE_MARKER's indicates end of library */
+        if (image->id == NPE_IMAGE_MARKER) {
+	    device_printf(sc->sc_dev,
+		"imageId 0x%08x not found in image library header\n", imageId);
+            /* reached end of library, image not found */
+            return EIO;
+        }
+        offset += image->size;
+    }
+    return EIO;
+}
+
+int
+ixpnpe_init(struct ixpnpe_softc *sc, const char *imageName, uint32_t imageId)
+{
+    uint32_t imageSize;
+    const uint32_t *imageCodePtr;
+    struct firmware *fw;
+    int error;
+
+    DPRINTF(sc->sc_dev, "load %s, imageId 0x%08x\n", imageName, imageId);
+
+#if 0
+    IxFeatureCtrlDeviceId devid = IX_NPEDL_DEVICEID_FROM_IMAGEID_GET(imageId);
+    /*
+     * Checking if image being loaded is meant for device that is running.
+     * Image is forward compatible. i.e Image built for IXP42X should run
+     * on IXP46X but not vice versa.
+     */
+    if (devid > (ixFeatureCtrlDeviceRead() & IX_FEATURE_CTRL_DEVICE_TYPE_MASK))
+	return EINVAL;
+#endif
+    error = ixpnpe_stopandreset(sc);		/* stop and reset the NPE */
+    if (error != 0)
+	return error;
+
+    fw = firmware_get(imageName);
+    if (fw == NULL)
+	return ENOENT;
+
+    /* Locate desired image in files w/ combined images */
+    error = npe_findimage(sc, fw->data, imageId, &imageCodePtr, &imageSize);
+    if (error != 0)
+	goto done;
+
+    /*
+     * If download was successful, store image Id in list of
+     * currently loaded images. If a critical error occured
+     * during download, record that the NPE has an invalid image
+     */
+    mtx_lock(&sc->sc_mtx);
+    error = npe_load_image(sc, imageCodePtr, 1 /*VERIFY*/);
+    if (error == 0) {
+	sc->validImage = 1;
+	error = ixpnpe_start_locked(sc);
+    } else {
+	sc->validImage = 0;
+    }
+    sc->functionalityId = IX_NPEDL_FUNCTIONID_FROM_IMAGEID_GET(imageId);
+    mtx_unlock(&sc->sc_mtx);
+done:
+    firmware_put(fw, FIRMWARE_UNLOAD);
+    DPRINTF(sc->sc_dev, "%s: error %d\n", __func__, error);
+    return error;
+}
+
+int
+ixpnpe_getfunctionality(struct ixpnpe_softc *sc)
+{
+    return (sc->validImage ? sc->functionalityId : 0);
+}
+
+static int
+npe_checkbits(struct ixpnpe_softc *sc, uint32_t reg, uint32_t expectedBitsSet)
+{
+    uint32_t val;
+
+    val = npe_reg_read(sc, reg);
+    DPRINTFn(5, sc->sc_dev, "%s(0x%x, 0x%x) => 0x%x (%u)\n",
+	__func__, reg, expectedBitsSet, val,
+	(val & expectedBitsSet) == expectedBitsSet);
+    return ((val & expectedBitsSet) == expectedBitsSet);
+}
+
+static int
+npe_isstopped(struct ixpnpe_softc *sc)
+{
+    return npe_checkbits(sc,
+	IX_NPEDL_REG_OFFSET_EXCTL, IX_NPEDL_EXCTL_STATUS_STOP);
+}
+
+static int
+npe_load_ins(struct ixpnpe_softc *sc,
+    const IxNpeDlNpeMgrCodeBlock *bp, int verify)
+{
+    uint32_t npeMemAddress;
+    int i, blockSize;
+
+    npeMemAddress = bp->npeMemAddress;
+    blockSize = bp->size;		/* NB: instruction/data count */
+    if (npeMemAddress + blockSize > sc->insMemSize) {
+	device_printf(sc->sc_dev, "Block size too big for NPE memory\n");
+	return EINVAL;	/* XXX */
+    }
+    for (i = 0; i < blockSize; i++, npeMemAddress++) {
+	if (npe_ins_write(sc, npeMemAddress, bp->data[i], verify) != 0) {
+	    device_printf(sc->sc_dev, "NPE instruction write failed");
+	    return EIO;
+	}
+    }
+    return 0;
+}
+
+static int
+npe_load_data(struct ixpnpe_softc *sc,
+    const IxNpeDlNpeMgrCodeBlock *bp, int verify)
+{
+    uint32_t npeMemAddress;
+    int i, blockSize;
+
+    npeMemAddress = bp->npeMemAddress;
+    blockSize = bp->size;		/* NB: instruction/data count */
+    if (npeMemAddress + blockSize > sc->dataMemSize) {
+	device_printf(sc->sc_dev, "Block size too big for NPE memory\n");
+	return EINVAL;
+    }
+    for (i = 0; i < blockSize; i++, npeMemAddress++) {
+	if (npe_data_write(sc, npeMemAddress, bp->data[i], verify) != 0) {
+	    device_printf(sc->sc_dev, "NPE data write failed\n");
+	    return EIO;
+	}
+    }
+    return 0;
+}
+
+static int
+npe_load_stateinfo(struct ixpnpe_softc *sc,
+    const IxNpeDlNpeMgrStateInfoBlock *bp, int verify)
+{
+    int i, nentries, error;
+ 
+    npe_cpu_step_save(sc);
+
+    /* for each state-info context register entry in block */
+    nentries = bp->size / IX_NPEDL_STATE_INFO_ENTRY_SIZE;
+    error = 0;
+    for (i = 0; i < nentries; i++) {
+	/* each state-info entry is 2 words (address, value) in length */
+	uint32_t regVal = bp->ctxtRegEntry[i].value;
+	uint32_t addrInfo = bp->ctxtRegEntry[i].addressInfo;
+
+	uint32_t reg = (addrInfo & IX_NPEDL_MASK_STATE_ADDR_CTXT_REG);
+	uint32_t cNum = (addrInfo & IX_NPEDL_MASK_STATE_ADDR_CTXT_NUM) >> 
+	    IX_NPEDL_OFFSET_STATE_ADDR_CTXT_NUM;
+	
+	/* error-check Context Register No. and Context Number values  */
+	if (!(0 <= reg && reg < IX_NPEDL_CTXT_REG_MAX)) {
+	    device_printf(sc->sc_dev, "invalid Context Register %u\n", reg);
+	    error = EINVAL;
+	    break;
+	}    
+	if (!(0 <= cNum && cNum < IX_NPEDL_CTXT_NUM_MAX)) {
+	    device_printf(sc->sc_dev, "invalid Context Number %u\n", cNum);
+	    error = EINVAL;
+	    break;
+	}    
+	/* NOTE that there is no STEVT register for Context 0 */
+	if (cNum == 0 && reg == IX_NPEDL_CTXT_REG_STEVT) {
+	    device_printf(sc->sc_dev, "no STEVT for Context 0\n");
+	    error = EINVAL;
+	    break;
+	}
+
+	if (npe_ctx_reg_write(sc, cNum, reg, regVal, verify) != 0) {
+	    device_printf(sc->sc_dev, "write of state-info to NPE failed\n");
+	    error = EIO;
+	    break;
+	}
+    }
+
+    npe_cpu_step_restore(sc);
+    return error;
+}
+
+static int
+npe_load_image(struct ixpnpe_softc *sc,
+    const uint32_t *imageCodePtr, int verify)
+{
+#define	EOM(marker)	((marker) == IX_NPEDL_END_OF_DOWNLOAD_MAP)
+    const IxNpeDlNpeMgrDownloadMap *downloadMap;
+    int i, error;
+
+    if (!npe_isstopped(sc)) {		/* verify NPE is stopped */
+	device_printf(sc->sc_dev, "cannot load image, NPE not stopped\n");
+	return EIO;
+    }
+
+    /*
+     * Read Download Map, checking each block type and calling
+     * appropriate function to perform download 
+     */
+    error = 0;
+    downloadMap = (const IxNpeDlNpeMgrDownloadMap *) imageCodePtr;
+    for (i = 0; !EOM(downloadMap->entry[i].eodmMarker); i++) {
+	/* calculate pointer to block to be downloaded */
+	const uint32_t *bp = imageCodePtr + downloadMap->entry[i].block.offset;
+	switch (downloadMap->entry[i].block.type) {
+	case IX_NPEDL_BLOCK_TYPE_INSTRUCTION:
+	    error = npe_load_ins(sc,
+			 (const IxNpeDlNpeMgrCodeBlock *) bp, verify);
+	    DPRINTF(sc->sc_dev, "%s: inst, error %d\n", __func__, error);
+	    break;
+	case IX_NPEDL_BLOCK_TYPE_DATA:
+	    error = npe_load_data(sc,
+			 (const IxNpeDlNpeMgrCodeBlock *) bp, verify);
+	    DPRINTF(sc->sc_dev, "%s: data, error %d\n", __func__, error);
+	    break;
+	case IX_NPEDL_BLOCK_TYPE_STATE:
+	    error = npe_load_stateinfo(sc,
+			 (const IxNpeDlNpeMgrStateInfoBlock *) bp, verify);
+	    DPRINTF(sc->sc_dev, "%s: state, error %d\n", __func__, error);
+	    break;
+	default:
+	    device_printf(sc->sc_dev,
+		"unknown block type 0x%x in download map\n",
+		downloadMap->entry[i].block.type);
+	    error = EIO;		/* XXX */
+	    break;
+	}
+	if (error != 0)
+	    break;
+    }
+    return error;
+#undef EOM
+}
+
+/* contains Reset values for Context Store Registers  */
+static const struct {
+    uint32_t regAddr;
+    uint32_t regResetVal;
+} ixNpeDlEcsRegResetValues[] = {
+    { IX_NPEDL_ECS_BG_CTXT_REG_0,    IX_NPEDL_ECS_BG_CTXT_REG_0_RESET },
+    { IX_NPEDL_ECS_BG_CTXT_REG_1,    IX_NPEDL_ECS_BG_CTXT_REG_1_RESET },
+    { IX_NPEDL_ECS_BG_CTXT_REG_2,    IX_NPEDL_ECS_BG_CTXT_REG_2_RESET },
+    { IX_NPEDL_ECS_PRI_1_CTXT_REG_0, IX_NPEDL_ECS_PRI_1_CTXT_REG_0_RESET },
+    { IX_NPEDL_ECS_PRI_1_CTXT_REG_1, IX_NPEDL_ECS_PRI_1_CTXT_REG_1_RESET },
+    { IX_NPEDL_ECS_PRI_1_CTXT_REG_2, IX_NPEDL_ECS_PRI_1_CTXT_REG_2_RESET },
+    { IX_NPEDL_ECS_PRI_2_CTXT_REG_0, IX_NPEDL_ECS_PRI_2_CTXT_REG_0_RESET },
+    { IX_NPEDL_ECS_PRI_2_CTXT_REG_1, IX_NPEDL_ECS_PRI_2_CTXT_REG_1_RESET },
+    { IX_NPEDL_ECS_PRI_2_CTXT_REG_2, IX_NPEDL_ECS_PRI_2_CTXT_REG_2_RESET },
+    { IX_NPEDL_ECS_DBG_CTXT_REG_0,   IX_NPEDL_ECS_DBG_CTXT_REG_0_RESET },
+    { IX_NPEDL_ECS_DBG_CTXT_REG_1,   IX_NPEDL_ECS_DBG_CTXT_REG_1_RESET },
+    { IX_NPEDL_ECS_DBG_CTXT_REG_2,   IX_NPEDL_ECS_DBG_CTXT_REG_2_RESET },
+    { IX_NPEDL_ECS_INSTRUCT_REG,     IX_NPEDL_ECS_INSTRUCT_REG_RESET }
+};
+
+/* contains Reset values for Context Store Registers  */
+static const uint32_t ixNpeDlCtxtRegResetValues[] = {
+    IX_NPEDL_CTXT_REG_RESET_STEVT,
+    IX_NPEDL_CTXT_REG_RESET_STARTPC,
+    IX_NPEDL_CTXT_REG_RESET_REGMAP,
+    IX_NPEDL_CTXT_REG_RESET_CINDEX,
+};
+
+#define	IX_NPEDL_RESET_NPE_PARITY	0x0800
+#define	IX_NPEDL_PARITY_BIT_MASK	0x3F00FFFF
+#define	IX_NPEDL_CONFIG_CTRL_REG_MASK	0x3F3FFFFF
+
+static int
+npe_cpu_reset(struct ixpnpe_softc *sc)
+{
+#define	N(a)	(sizeof(a) / sizeof(a[0]))
+    struct ixp425_softc *sa = device_get_softc(device_get_parent(sc->sc_dev));
+    uint32_t ctxtReg; /* identifies Context Store reg (0-3) */
+    uint32_t regAddr;
+    uint32_t regVal;
+    uint32_t resetNpeParity;
+    uint32_t ixNpeConfigCtrlRegVal;
+    int i, error = 0;
+    
+    /* pre-store the NPE Config Control Register Value */
+    ixNpeConfigCtrlRegVal = npe_reg_read(sc, IX_NPEDL_REG_OFFSET_CTL);
+    ixNpeConfigCtrlRegVal |= 0x3F000000;
+
+    /* disable the parity interrupt */
+    npe_reg_write(sc, IX_NPEDL_REG_OFFSET_CTL,
+	(ixNpeConfigCtrlRegVal & IX_NPEDL_PARITY_BIT_MASK));
+    DPRINTFn(2, sc->sc_dev, "%s: dis parity int, CTL => 0x%x\n",
+	__func__, ixNpeConfigCtrlRegVal & IX_NPEDL_PARITY_BIT_MASK);
+ 
+    npe_cpu_step_save(sc);
+
+    /*
+     * Clear the FIFOs.
+     */
+    while (npe_checkbits(sc,
+	  IX_NPEDL_REG_OFFSET_WFIFO, IX_NPEDL_MASK_WFIFO_VALID)) {
+	/* read from the Watch-point FIFO until empty */
+	(void) npe_reg_read(sc, IX_NPEDL_REG_OFFSET_WFIFO);
+    }
+
+    while (npe_checkbits(sc,
+	  IX_NPEDL_REG_OFFSET_STAT, IX_NPEDL_MASK_STAT_OFNE)) {
+	/* read from the outFIFO until empty */
+	(void) npe_reg_read(sc, IX_NPEDL_REG_OFFSET_FIFO);
+    }
+    
+    while (npe_checkbits(sc,
+	  IX_NPEDL_REG_OFFSET_STAT, IX_NPEDL_MASK_STAT_IFNE)) {
+	/*
+	 * Step execution of the NPE intruction to read inFIFO using
+	 * the Debug Executing Context stack.
+	 */
+	error = npe_cpu_step(sc, IX_NPEDL_INSTR_RD_FIFO, 0, 0);
+	if (error != 0) {
+	    DPRINTF(sc->sc_dev, "%s: cannot step (1), error %u\n",
+		__func__, error);
+	    npe_cpu_step_restore(sc);
+	    return error;   
+	}
+    }
+    
+    /*
+     * Reset the mailbox reg
+     */
+    /* ...from XScale side */
+    npe_reg_write(sc, IX_NPEDL_REG_OFFSET_MBST, IX_NPEDL_REG_RESET_MBST);
+    /* ...from NPE side */
+    error = npe_cpu_step(sc, IX_NPEDL_INSTR_RESET_MBOX, 0, 0);
+    if (error != 0) {
+	DPRINTF(sc->sc_dev, "%s: cannot step (2), error %u\n", __func__, error);
+	npe_cpu_step_restore(sc);
+        return error;   
+    }
+
+    /* 
+     * Reset the physical registers in the NPE register file:
+     * Note: no need to save/restore REGMAP for Context 0 here
+     * since all Context Store regs are reset in subsequent code.
+     */
+    for (regAddr = 0;
+	 regAddr < IX_NPEDL_TOTAL_NUM_PHYS_REG && error == 0;
+	 regAddr++) {
+	/* for each physical register in the NPE reg file, write 0 : */
+	error = npe_physical_reg_write(sc, regAddr, 0, TRUE);
+	if (error != 0) {
+	    DPRINTF(sc->sc_dev, "%s: cannot write phy reg, error %u\n",
+		__func__, error);
+	    npe_cpu_step_restore(sc);
+	    return error;		/* abort reset */
+	}
+    }
+
+    /*
+     * Reset the context store:
+     */
+    for (i = IX_NPEDL_CTXT_NUM_MIN; i <= IX_NPEDL_CTXT_NUM_MAX; i++) {	
+	/* set each context's Context Store registers to reset values: */
+	for (ctxtReg = 0; ctxtReg < IX_NPEDL_CTXT_REG_MAX; ctxtReg++) {
+	    /* NOTE that there is no STEVT register for Context 0 */
+	    if (!(i == 0 && ctxtReg == IX_NPEDL_CTXT_REG_STEVT)) { 
+		regVal = ixNpeDlCtxtRegResetValues[ctxtReg];
+		error = npe_ctx_reg_write(sc, i, ctxtReg, regVal, TRUE);
+		if (error != 0) {
+		    DPRINTF(sc->sc_dev, "%s: cannot write ctx reg, error %u\n",
+			__func__, error);
+		    npe_cpu_step_restore(sc);
+		    return error;	 /* abort reset */
+		}
+	    }
+	}
+    }
+
+    npe_cpu_step_restore(sc);
+
+    /* write Reset values to Execution Context Stack registers */
+    for (i = 0; i < N(ixNpeDlEcsRegResetValues); i++)
+	npe_ecs_reg_write(sc,
+	    ixNpeDlEcsRegResetValues[i].regAddr,
+	    ixNpeDlEcsRegResetValues[i].regResetVal);
+
+    /* clear the profile counter */
+    npe_issue_cmd(sc, IX_NPEDL_EXCTL_CMD_CLR_PROFILE_CNT);
+    
+    /* clear registers EXCT, AP0, AP1, AP2 and AP3 */
+    for (regAddr = IX_NPEDL_REG_OFFSET_EXCT;
+	 regAddr <= IX_NPEDL_REG_OFFSET_AP3;
+	 regAddr += sizeof(uint32_t))
+	npe_reg_write(sc, regAddr, 0);
+
+    /* Reset the Watch-count register */
+    npe_reg_write(sc, IX_NPEDL_REG_OFFSET_WC, 0);
+    
+    /*
+     * WR IXA00055043 - Remove IMEM Parity Introduced by NPE Reset Operation
+     */
+
+    /*
+     * Reset the NPE and its coprocessor - to reset internal
+     * states and remove parity error.  Note this makes no
+     * sense based on the documentation.  The feature control
+     * register always reads back as 0 on the ixp425 and further
+     * the bit definition of NPEA/NPEB is off by 1 according to
+     * the Intel documention--so we're blindly following the
+     * Intel code w/o any real understanding.
+     */
+    regVal = EXP_BUS_READ_4(sa, EXP_FCTRL_OFFSET);
+    DPRINTFn(2, sc->sc_dev, "%s: FCTRL 0x%x\n", __func__, regVal);
+    resetNpeParity =
+	IX_NPEDL_RESET_NPE_PARITY << (1 + device_get_unit(sc->sc_dev));
+    DPRINTFn(2, sc->sc_dev, "%s: FCTRL fuse parity, write 0x%x\n",
+	__func__, regVal | resetNpeParity);
+    EXP_BUS_WRITE_4(sa, EXP_FCTRL_OFFSET, regVal | resetNpeParity);
+
+    /* un-fuse and un-reset the NPE & coprocessor */
+    DPRINTFn(2, sc->sc_dev, "%s: FCTRL unfuse parity, write 0x%x\n",
+	__func__, regVal & resetNpeParity);
+    EXP_BUS_WRITE_4(sa, EXP_FCTRL_OFFSET, regVal &~ resetNpeParity);
+
+    /*
+     * Call NpeMgr function to stop the NPE again after the Feature Control
+     * has unfused and Un-Reset the NPE and its associated Coprocessors.
+     */
+    error = npe_cpu_stop(sc);
+
+    /* restore NPE configuration bus Control Register - Parity Settings  */
+    npe_reg_write(sc, IX_NPEDL_REG_OFFSET_CTL, 
+        (ixNpeConfigCtrlRegVal & IX_NPEDL_CONFIG_CTRL_REG_MASK));
+    DPRINTFn(2, sc->sc_dev, "%s: restore CTL => 0x%x\n",
+	__func__, npe_reg_read(sc, IX_NPEDL_REG_OFFSET_CTL));
+
+    return error;
+#undef N
+}
+
+static int
+npe_cpu_start(struct ixpnpe_softc *sc)
+{
+    uint32_t ecsRegVal;
+
+    /*
+     * Ensure only Background Context Stack Level is Active by turning off
+     * the Active bit in each of the other Executing Context Stack levels.
+     */
+    ecsRegVal = npe_ecs_reg_read(sc, IX_NPEDL_ECS_PRI_1_CTXT_REG_0);
+    ecsRegVal &= ~IX_NPEDL_MASK_ECS_REG_0_ACTIVE;
+    npe_ecs_reg_write(sc, IX_NPEDL_ECS_PRI_1_CTXT_REG_0, ecsRegVal);
+
+    ecsRegVal = npe_ecs_reg_read(sc, IX_NPEDL_ECS_PRI_2_CTXT_REG_0);
+    ecsRegVal &= ~IX_NPEDL_MASK_ECS_REG_0_ACTIVE;
+    npe_ecs_reg_write(sc, IX_NPEDL_ECS_PRI_2_CTXT_REG_0, ecsRegVal);
+
+    ecsRegVal = npe_ecs_reg_read(sc, IX_NPEDL_ECS_DBG_CTXT_REG_0);
+    ecsRegVal &= ~IX_NPEDL_MASK_ECS_REG_0_ACTIVE;
+    npe_ecs_reg_write(sc, IX_NPEDL_ECS_DBG_CTXT_REG_0, ecsRegVal);
+    
+    /* clear the pipeline */
+    npe_issue_cmd(sc, IX_NPEDL_EXCTL_CMD_NPE_CLR_PIPE);
+    
+    /* start NPE execution by issuing command through EXCTL register on NPE */
+    npe_issue_cmd(sc, IX_NPEDL_EXCTL_CMD_NPE_START);
+
+    /*
+     * Check execution status of NPE to verify operation was successful.
+     */
+    return npe_checkbits(sc,
+	IX_NPEDL_REG_OFFSET_EXCTL, IX_NPEDL_EXCTL_STATUS_RUN) ? 0 : EIO;
+}
+
+static int
+npe_cpu_stop(struct ixpnpe_softc *sc)
+{
+    /* stop NPE execution by issuing command through EXCTL register on NPE */
+    npe_issue_cmd(sc, IX_NPEDL_EXCTL_CMD_NPE_STOP);
+
+    /* verify that NPE Stop was successful */
+    return npe_checkbits(sc,
+	IX_NPEDL_REG_OFFSET_EXCTL, IX_NPEDL_EXCTL_STATUS_STOP) ? 0 : EIO;
+}
+
+#define IX_NPEDL_REG_SIZE_BYTE            8
+#define IX_NPEDL_REG_SIZE_SHORT           16
+#define IX_NPEDL_REG_SIZE_WORD            32
+
+/*
+ * Introduce extra read cycles after issuing read command to NPE
+ * so that we read the register after the NPE has updated it
+ * This is to overcome race condition between XScale and NPE
+ */
+#define IX_NPEDL_DELAY_READ_CYCLES        2
+/*
+ * To mask top three MSBs of 32bit word to download into NPE IMEM
+ */
+#define IX_NPEDL_MASK_UNUSED_IMEM_BITS    0x1FFFFFFF;
+
+static void
+npe_cmd_issue_write(struct ixpnpe_softc *sc,
+    uint32_t cmd, uint32_t addr, uint32_t data)
+{
+    npe_reg_write(sc, IX_NPEDL_REG_OFFSET_EXDATA, data);
+    npe_reg_write(sc, IX_NPEDL_REG_OFFSET_EXAD, addr);
+    npe_reg_write(sc, IX_NPEDL_REG_OFFSET_EXCTL, cmd);
+}
+
+static uint32_t
+npe_cmd_issue_read(struct ixpnpe_softc *sc, uint32_t cmd, uint32_t addr)
+{
+    uint32_t data;
+    int i;
+
+    npe_reg_write(sc, IX_NPEDL_REG_OFFSET_EXAD, addr);
+    npe_reg_write(sc, IX_NPEDL_REG_OFFSET_EXCTL, cmd);
+    for (i = 0; i <= IX_NPEDL_DELAY_READ_CYCLES; i++)
+	data = npe_reg_read(sc, IX_NPEDL_REG_OFFSET_EXDATA);
+    return data;
+}
+
+static int
+npe_ins_write(struct ixpnpe_softc *sc, uint32_t addr, uint32_t data, int verify)
+{
+    DPRINTFn(4, sc->sc_dev, "%s(0x%x, 0x%x)\n", __func__, addr, data);
+    npe_cmd_issue_write(sc, IX_NPEDL_EXCTL_CMD_WR_INS_MEM, addr, data);
+    if (verify) {
+	uint32_t rdata;
+
+        /*
+	 * Write invalid data to this reg, so we can see if we're reading 
+	 * the EXDATA register too early.
+	 */
+	npe_reg_write(sc, IX_NPEDL_REG_OFFSET_EXDATA, ~data);
+
+        /* Disabled since top 3 MSB are not used for Azusa hardware Refer WR:IXA00053900*/
+        data &= IX_NPEDL_MASK_UNUSED_IMEM_BITS;
+
+        rdata = npe_cmd_issue_read(sc, IX_NPEDL_EXCTL_CMD_RD_INS_MEM, addr);
+        rdata &= IX_NPEDL_MASK_UNUSED_IMEM_BITS;
+
+	if (data != rdata)
+	    return EIO;
+    }
+    return 0;
+}
+
+static int
+npe_data_write(struct ixpnpe_softc *sc, uint32_t addr, uint32_t data, int verify)
+{
+    DPRINTFn(4, sc->sc_dev, "%s(0x%x, 0x%x)\n", __func__, addr, data);
+    npe_cmd_issue_write(sc, IX_NPEDL_EXCTL_CMD_WR_DATA_MEM, addr, data);
+    if (verify) {
+        /*
+	 * Write invalid data to this reg, so we can see if we're reading 
+	 * the EXDATA register too early.
+	 */
+	npe_reg_write(sc, IX_NPEDL_REG_OFFSET_EXDATA, ~data);
+	if (data != npe_cmd_issue_read(sc, IX_NPEDL_EXCTL_CMD_RD_DATA_MEM, addr))
+	    return EIO;
+    }
+    return 0;
+}
+
+static void
+npe_ecs_reg_write(struct ixpnpe_softc *sc, uint32_t reg, uint32_t data)
+{
+    npe_cmd_issue_write(sc, IX_NPEDL_EXCTL_CMD_WR_ECS_REG, reg, data);
+}
+
+static uint32_t
+npe_ecs_reg_read(struct ixpnpe_softc *sc, uint32_t reg)
+{
+    return npe_cmd_issue_read(sc, IX_NPEDL_EXCTL_CMD_RD_ECS_REG, reg);
+}
+
+static void
+npe_issue_cmd(struct ixpnpe_softc *sc, uint32_t command)
+{
+    npe_reg_write(sc, IX_NPEDL_REG_OFFSET_EXCTL, command);
+}
+
+static void
+npe_cpu_step_save(struct ixpnpe_softc *sc)
+{
+    /* turn off the halt bit by clearing Execution Count register. */
+    /* save reg contents 1st and restore later */
+    sc->savedExecCount = npe_reg_read(sc, IX_NPEDL_REG_OFFSET_EXCT);
+    npe_reg_write(sc, IX_NPEDL_REG_OFFSET_EXCT, 0);
+
+    /* ensure that IF and IE are on (temporarily), so that we don't end up
+     * stepping forever */
+    sc->savedEcsDbgCtxtReg2 = npe_ecs_reg_read(sc, IX_NPEDL_ECS_DBG_CTXT_REG_2);
+
+    npe_ecs_reg_write(sc, IX_NPEDL_ECS_DBG_CTXT_REG_2,
+	(sc->savedEcsDbgCtxtReg2 | IX_NPEDL_MASK_ECS_DBG_REG_2_IF |
+	 IX_NPEDL_MASK_ECS_DBG_REG_2_IE));
+}
+
+static int
+npe_cpu_step(struct ixpnpe_softc *sc, uint32_t npeInstruction,
+    uint32_t ctxtNum, uint32_t ldur)
+{
+#define	IX_NPE_DL_MAX_NUM_OF_RETRIES	1000000
+    uint32_t ecsDbgRegVal;
+    uint32_t oldWatchcount, newWatchcount;
+    int tries;
+
+    /* set the Active bit, and the LDUR, in the debug level */
+    ecsDbgRegVal = IX_NPEDL_MASK_ECS_REG_0_ACTIVE |
+	(ldur << IX_NPEDL_OFFSET_ECS_REG_0_LDUR);
+
+    npe_ecs_reg_write(sc, IX_NPEDL_ECS_DBG_CTXT_REG_0, ecsDbgRegVal);
+
+    /*
+     * Set CCTXT at ECS DEBUG L3 to specify in which context to execute the
+     * instruction, and set SELCTXT at ECS DEBUG Level to specify which context
+     * store to access.
+     * Debug ECS Level Reg 1 has form  0x000n000n, where n = context number
+     */
+    ecsDbgRegVal = (ctxtNum << IX_NPEDL_OFFSET_ECS_REG_1_CCTXT) |
+	(ctxtNum << IX_NPEDL_OFFSET_ECS_REG_1_SELCTXT);
+
+    npe_ecs_reg_write(sc, IX_NPEDL_ECS_DBG_CTXT_REG_1, ecsDbgRegVal);
+
+    /* clear the pipeline */
+    npe_issue_cmd(sc, IX_NPEDL_EXCTL_CMD_NPE_CLR_PIPE);
+
+    /* load NPE instruction into the instruction register */
+    npe_ecs_reg_write(sc, IX_NPEDL_ECS_INSTRUCT_REG, npeInstruction);
+
+    /* we need this value later to wait for completion of NPE execution step */
+    oldWatchcount = npe_reg_read(sc, IX_NPEDL_REG_OFFSET_WC);
+
+    /* issue a Step One command via the Execution Control register */
+    npe_issue_cmd(sc, IX_NPEDL_EXCTL_CMD_NPE_STEP);
+
+    /*
+     * Force the XScale to wait until the NPE has finished execution step
+     * NOTE that this delay will be very small, just long enough to allow a
+     * single NPE instruction to complete execution; if instruction execution
+     * is not completed before timeout retries, exit the while loop.
+     */
+    newWatchcount = npe_reg_read(sc, IX_NPEDL_REG_OFFSET_WC);
+    for (tries = 0; tries < IX_NPE_DL_MAX_NUM_OF_RETRIES &&
+        newWatchcount == oldWatchcount; tries++) {
+	/* Watch Count register increments when NPE completes an instruction */
+	newWatchcount = npe_reg_read(sc, IX_NPEDL_REG_OFFSET_WC);
+    }    
+    return (tries < IX_NPE_DL_MAX_NUM_OF_RETRIES) ? 0 : EIO;
+#undef IX_NPE_DL_MAX_NUM_OF_RETRIES
+}    
+
+static void
+npe_cpu_step_restore(struct ixpnpe_softc *sc)
+{
+    /* clear active bit in debug level */
+    npe_ecs_reg_write(sc, IX_NPEDL_ECS_DBG_CTXT_REG_0, 0);
+
+    /* clear the pipeline */
+    npe_issue_cmd(sc, IX_NPEDL_EXCTL_CMD_NPE_CLR_PIPE);
+
+    /* restore Execution Count register contents. */
+    npe_reg_write(sc, IX_NPEDL_REG_OFFSET_EXCT, sc->savedExecCount);
+
+    /* restore IF and IE bits to original values */
+    npe_ecs_reg_write(sc, IX_NPEDL_ECS_DBG_CTXT_REG_2, sc->savedEcsDbgCtxtReg2);
+}
+
+static int
+npe_logical_reg_read(struct ixpnpe_softc *sc,
+    uint32_t regAddr, uint32_t regSize,
+    uint32_t ctxtNum, uint32_t *regVal)
+{
+    uint32_t npeInstruction, mask;
+    int error;
+
+    switch (regSize) {
+    case IX_NPEDL_REG_SIZE_BYTE:
+	npeInstruction = IX_NPEDL_INSTR_RD_REG_BYTE;
+	mask = 0xff;
+	break;
+    case IX_NPEDL_REG_SIZE_SHORT:
+	npeInstruction = IX_NPEDL_INSTR_RD_REG_SHORT;
+	mask = 0xffff;
+	break;
+    case IX_NPEDL_REG_SIZE_WORD:
+	npeInstruction = IX_NPEDL_INSTR_RD_REG_WORD;
+	mask = 0xffffffff;
+	break;
+    default:
+	return EINVAL;
+    }
+
+    /* make regAddr be the SRC and DEST operands (e.g. movX d0, d0) */
+    npeInstruction |= (regAddr << IX_NPEDL_OFFSET_INSTR_SRC) |
+	(regAddr << IX_NPEDL_OFFSET_INSTR_DEST);
+
+    /* step execution of NPE intruction using Debug Executing Context stack */
+    error = npe_cpu_step(sc, npeInstruction, ctxtNum, IX_NPEDL_RD_INSTR_LDUR);
+    if (error != 0) {
+	DPRINTF(sc->sc_dev, "%s(0x%x, %u, %u), cannot step, error %d\n",
+	    __func__, regAddr, regSize, ctxtNum, error);
+	return error;
+    }
+    /* read value of register from Execution Data register */
+    *regVal = npe_reg_read(sc, IX_NPEDL_REG_OFFSET_EXDATA);
+
+    /* align value from left to right */
+    *regVal = (*regVal >> (IX_NPEDL_REG_SIZE_WORD - regSize)) & mask;
+
+    return 0;
+}
+
+static int
+npe_logical_reg_write(struct ixpnpe_softc *sc, uint32_t regAddr, uint32_t regVal,
+    uint32_t regSize, uint32_t ctxtNum, int verify)
+{
+    int error;
+
+    DPRINTFn(4, sc->sc_dev, "%s(0x%x, 0x%x, %u, %u)\n",
+	__func__, regAddr, regVal, regSize, ctxtNum);
+    if (regSize == IX_NPEDL_REG_SIZE_WORD) {
+	/* NPE register addressing is left-to-right: e.g. |d0|d1|d2|d3| */
+	/* Write upper half-word (short) to |d0|d1| */
+	error = npe_logical_reg_write(sc, regAddr,
+		     regVal >> IX_NPEDL_REG_SIZE_SHORT,
+		     IX_NPEDL_REG_SIZE_SHORT, ctxtNum, verify);
+	if (error != 0)
+	    return error;
+
+	/* Write lower half-word (short) to |d2|d3| */
+	error = npe_logical_reg_write(sc,
+		     regAddr + sizeof(uint16_t),
+		     regVal & 0xffff,
+		     IX_NPEDL_REG_SIZE_SHORT, ctxtNum, verify);
+    } else {
+	uint32_t npeInstruction;
+
+        switch (regSize) { 
+	case IX_NPEDL_REG_SIZE_BYTE:
+	    npeInstruction = IX_NPEDL_INSTR_WR_REG_BYTE;
+	    regVal &= 0xff;
+	    break;
+	case IX_NPEDL_REG_SIZE_SHORT:
+            npeInstruction = IX_NPEDL_INSTR_WR_REG_SHORT;
+	    regVal &= 0xffff;
+	    break;
+	default:
+	    return EINVAL;
+	}
+	/* fill dest operand field of  instruction with destination reg addr */
+	npeInstruction |= (regAddr << IX_NPEDL_OFFSET_INSTR_DEST);
+
+	/* fill src operand field of instruction with least-sig 5 bits of val*/
+	npeInstruction |= ((regVal & IX_NPEDL_MASK_IMMED_INSTR_SRC_DATA) <<
+			   IX_NPEDL_OFFSET_INSTR_SRC);
+
+	/* fill coprocessor field of instruction with most-sig 11 bits of val*/
+	npeInstruction |= ((regVal & IX_NPEDL_MASK_IMMED_INSTR_COPROC_DATA) <<
+			   IX_NPEDL_DISPLACE_IMMED_INSTR_COPROC_DATA);
+
+	/* step execution of NPE intruction using Debug ECS */
+	error = npe_cpu_step(sc, npeInstruction,
+					  ctxtNum, IX_NPEDL_WR_INSTR_LDUR);
+    }
+    if (error != 0) {
+	DPRINTF(sc->sc_dev, "%s(0x%x, 0x%x, %u, %u), error %u writing reg\n",
+	    __func__, regAddr, regVal, regSize, ctxtNum, error);
+	return error;
+    }
+    if (verify) {
+	uint32_t retRegVal;
+
+    	error = npe_logical_reg_read(sc, regAddr, regSize, ctxtNum, &retRegVal);
+        if (error == 0 && regVal != retRegVal)
+	    error = EIO;	/* XXX ambiguous */
+    }
+    return error;
+}
+
+/*
+ * There are 32 physical registers used in an NPE.  These are
+ * treated as 16 pairs of 32-bit registers.  To write one of the pair,
+ * write the pair number (0-16) to the REGMAP for Context 0.  Then write
+ * the value to register  0 or 4 in the regfile, depending on which
+ * register of the pair is to be written
+ */
+static int
+npe_physical_reg_write(struct ixpnpe_softc *sc,
+    uint32_t regAddr, uint32_t regValue, int verify)
+{
+    int error;
+
+    /*
+     * Set REGMAP for context 0 to (regAddr >> 1) to choose which pair (0-16)
+     * of physical registers to write .
+     */
+    error = npe_logical_reg_write(sc, IX_NPEDL_CTXT_REG_ADDR_REGMAP,
+	       (regAddr >> IX_NPEDL_OFFSET_PHYS_REG_ADDR_REGMAP),
+	       IX_NPEDL_REG_SIZE_SHORT, 0, verify);
+    if (error == 0) {
+	/* regAddr = 0 or 4  */
+	regAddr = (regAddr & IX_NPEDL_MASK_PHYS_REG_ADDR_LOGICAL_ADDR) *
+	    sizeof(uint32_t);
+	error = npe_logical_reg_write(sc, regAddr, regValue, 
+	    IX_NPEDL_REG_SIZE_WORD, 0, verify);
+    }
+    return error;
+}
+
+static int
+npe_ctx_reg_write(struct ixpnpe_softc *sc, uint32_t ctxtNum,
+    uint32_t ctxtReg, uint32_t ctxtRegVal, int verify)
+{
+    DPRINTFn(4, sc->sc_dev, "%s(%u, %u, %u)\n",
+	__func__, ctxtNum, ctxtReg, ctxtRegVal);
+    /*
+     * Context 0 has no STARTPC. Instead, this value is used to set
+     * NextPC for Background ECS, to set where NPE starts executing code
+     */
+    if (ctxtNum == 0 && ctxtReg == IX_NPEDL_CTXT_REG_STARTPC) {
+	/* read BG_CTXT_REG_0, update NEXTPC bits, and write back to reg */
+	uint32_t v = npe_ecs_reg_read(sc, IX_NPEDL_ECS_BG_CTXT_REG_0);
+	v &= ~IX_NPEDL_MASK_ECS_REG_0_NEXTPC;
+	v |= (ctxtRegVal << IX_NPEDL_OFFSET_ECS_REG_0_NEXTPC) &
+	    IX_NPEDL_MASK_ECS_REG_0_NEXTPC;
+
+	npe_ecs_reg_write(sc, IX_NPEDL_ECS_BG_CTXT_REG_0, v);
+	return 0;
+    } else {
+	static const struct {
+	    uint32_t regAddress;
+	    uint32_t regSize;
+	} regAccInfo[IX_NPEDL_CTXT_REG_MAX] = {
+	    { IX_NPEDL_CTXT_REG_ADDR_STEVT,	IX_NPEDL_REG_SIZE_BYTE },
+	    { IX_NPEDL_CTXT_REG_ADDR_STARTPC,	IX_NPEDL_REG_SIZE_SHORT },
+	    { IX_NPEDL_CTXT_REG_ADDR_REGMAP,	IX_NPEDL_REG_SIZE_SHORT },
+	    { IX_NPEDL_CTXT_REG_ADDR_CINDEX,	IX_NPEDL_REG_SIZE_BYTE }
+	};
+	return npe_logical_reg_write(sc, regAccInfo[ctxtReg].regAddress,
+		ctxtRegVal, regAccInfo[ctxtReg].regSize, ctxtNum, verify);
+    }
+}
+
+/*
+ * NPE Mailbox support.
+ */
+#define	IX_NPEMH_MAXTRIES	100000
+
+static int
+ixpnpe_ofifo_wait(struct ixpnpe_softc *sc)
+{
+    int i;
+
+    for (i = 0; i < IX_NPEMH_MAXTRIES; i++) {
+        if (npe_reg_read(sc, IX_NPESTAT) & IX_NPESTAT_OFNE)
+	    return 1;
+	DELAY(10);
+    }
+    device_printf(sc->sc_dev, "%s: timeout, last status 0x%x\n",
+	__func__, npe_reg_read(sc, IX_NPESTAT));
+    return 0;
+}
+
+static void
+ixpnpe_intr(void *arg)
+{
+    struct ixpnpe_softc *sc = arg;
+    uint32_t status;
+
+    status = npe_reg_read(sc, IX_NPESTAT);
+    if ((status & IX_NPESTAT_OFINT) == 0) {
+	/* NB: should not happen */
+	device_printf(sc->sc_dev, "%s: status 0x%x\n", __func__, status);
+	/* XXX must silence interrupt? */
+	return;
+    }
+    /*
+     * A message is waiting in the output FIFO, copy it so
+     * the interrupt will be silenced; then signal anyone
+     * waiting to collect the result.
+     */
+    sc->sc_msgwaiting = -1;		/* NB: error indicator */
+    if (ixpnpe_ofifo_wait(sc)) {
+	sc->sc_msg[0] = npe_reg_read(sc, IX_NPEFIFO);
+	if (ixpnpe_ofifo_wait(sc)) {
+	    sc->sc_msg[1] = npe_reg_read(sc, IX_NPEFIFO);
+	    sc->sc_msgwaiting = 1;	/* successful fetch */
+	}
+    }
+    wakeup_one(sc);
+}
+
+static int
+ixpnpe_ififo_wait(struct ixpnpe_softc *sc)
+{
+    int i;
+
+    for (i = 0; i < IX_NPEMH_MAXTRIES; i++) {
+	if (npe_reg_read(sc, IX_NPESTAT) & IX_NPESTAT_IFNF)
+	    return 1;
+	DELAY(10);
+    }
+    return 0;
+}
+
+static int
+ixpnpe_sendmsg_locked(struct ixpnpe_softc *sc, const uint32_t msg[2])
+{
+    int error = 0;
+
+    mtx_assert(&sc->sc_mtx, MA_OWNED);
+
+    sc->sc_msgwaiting = 0;
+    if (ixpnpe_ififo_wait(sc)) {
+	npe_reg_write(sc, IX_NPEFIFO, msg[0]);
+	if (ixpnpe_ififo_wait(sc))
+	    npe_reg_write(sc, IX_NPEFIFO, msg[1]);
+	else
+	    error = EIO;
+    } else
+	error = EIO;
+
+    if (error)
+	device_printf(sc->sc_dev, "input FIFO timeout, msg [0x%x,0x%x]\n",
+	    msg[0], msg[1]);
+    return error;
+}
+
+static int
+ixpnpe_recvmsg_locked(struct ixpnpe_softc *sc, uint32_t msg[2])
+{
+    mtx_assert(&sc->sc_mtx, MA_OWNED);
+
+    if (!sc->sc_msgwaiting)
+	msleep(sc, &sc->sc_mtx, 0, "npemh", 0);
+    bcopy(sc->sc_msg, msg, sizeof(sc->sc_msg));
+    /* NB: sc_msgwaiting != 1 means the ack fetch failed */
+    return sc->sc_msgwaiting != 1 ? EIO : 0;
+}
+
+/*
+ * Send a msg to the NPE and wait for a reply.  We use the
+ * private mutex and sleep until an interrupt is received
+ * signalling the availability of data in the output FIFO
+ * so the caller cannot be holding a mutex.  May be better
+ * piggyback on the caller's mutex instead but that would
+ * make other locking confusing.
+ */
+int
+ixpnpe_sendandrecvmsg(struct ixpnpe_softc *sc,
+	const uint32_t send[2], uint32_t recv[2])
+{
+    int error;
+
+    mtx_lock(&sc->sc_mtx);
+    error = ixpnpe_sendmsg_locked(sc, send);
+    if (error == 0)
+	error = ixpnpe_recvmsg_locked(sc, recv);
+    mtx_unlock(&sc->sc_mtx);
+
+    return error;
+}
+
+/* XXX temporary, not reliable */
+
+int
+ixpnpe_sendmsg(struct ixpnpe_softc *sc, const uint32_t msg[2])
+{
+    int error;
+
+    mtx_lock(&sc->sc_mtx);
+    error = ixpnpe_sendmsg_locked(sc, msg);
+    mtx_unlock(&sc->sc_mtx);
+
+    return error;
+}
+
+int
+ixpnpe_recvmsg(struct ixpnpe_softc *sc, uint32_t msg[2])
+{
+    int error;
+
+    mtx_lock(&sc->sc_mtx);
+    if (sc->sc_msgwaiting)
+	bcopy(sc->sc_msg, msg, sizeof(sc->sc_msg));
+    /* NB: sc_msgwaiting != 1 means the ack fetch failed */
+    error = sc->sc_msgwaiting != 1 ? EIO : 0;
+    mtx_unlock(&sc->sc_mtx);
+
+    return error;
+}
diff --git a/sys/arm/xscale/ixp425/ixp425_npereg.h b/sys/arm/xscale/ixp425/ixp425_npereg.h
new file mode 100644
index 000000000000..b3e684cbbe08
--- /dev/null
+++ b/sys/arm/xscale/ixp425/ixp425_npereg.h
@@ -0,0 +1,434 @@
+/*-
+ * Copyright (c) 2006 Sam Leffler, Errno Consulting
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
+ *    redistribution must be conditioned upon including a substantially
+ *    similar Disclaimer requirement for further binary redistribution.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
+ * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+ * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGES.
+ *
+ * $FreeBSD$
+ */
+
+/*-
+ * Copyright (c) 2001-2005, Intel Corporation.
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Intel Corporation nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+*/
+
+#ifndef _IXP425_NPEREG_H_
+#define _IXP425_NPEREG_H_
+
+/* signature found as 1st word in a microcode image library */
+#define IX_NPEDL_IMAGEMGR_SIGNATURE      0xDEADBEEF
+/* marks end of header in a microcode image library */
+#define IX_NPEDL_IMAGEMGR_END_OF_HEADER  0xFFFFFFFF
+
+/*
+ * Intel (R) IXP400 Software NPE Image ID Definition
+ *
+ * Definition of NPE Image ID to be passed to ixNpeDlNpeInitAndStart()
+ * as input of type uint32_t which has the following fields format:
+ *
+ * Field		[Bit Location]
+ * -----------------------------------
+ * Device ID		[31 - 28]
+ * NPE ID		[27 - 24]
+ * NPE Functionality ID	[23 - 16]
+ * Major Release Number	[15 -  8]
+ * Minor Release Number	[7 - 0]
+ */
+#define IX_NPEDL_NPEID_FROM_IMAGEID_GET(imageId) \
+    (((imageId) >> 24) & 0xf)
+#define IX_NPEDL_DEVICEID_FROM_IMAGEID_GET(imageId) \
+    (((imageId) >> 28) & 0xf)
+#define IX_NPEDL_FUNCTIONID_FROM_IMAGEID_GET(imageId) \
+    (((imageId) >> 16) & 0xff)
+#define IX_NPEDL_MAJOR_FROM_IMAGEID_GET(imageId) \
+    (((imageId) >> 8) & 0xff)
+#define IX_NPEDL_MINOR_FROM_IMAGEID_GET(imageId) \
+    (((imageId) >> 0) & 0xff)
+
+/*
+ * Instruction and Data Memory Size (in words) for each NPE 
+ */
+#ifndef __ixp46X
+#define IX_NPEDL_INS_MEMSIZE_WORDS_NPEA     4096
+#define IX_NPEDL_INS_MEMSIZE_WORDS_NPEB     2048
+#define IX_NPEDL_INS_MEMSIZE_WORDS_NPEC     2048
+
+#define IX_NPEDL_DATA_MEMSIZE_WORDS_NPEA    2048
+#define IX_NPEDL_DATA_MEMSIZE_WORDS_NPEB    2048
+#define IX_NPEDL_DATA_MEMSIZE_WORDS_NPEC    2048
+#else
+#define IX_NPEDL_INS_MEMSIZE_WORDS_NPEA     4096
+#define IX_NPEDL_INS_MEMSIZE_WORDS_NPEB     4096
+#define IX_NPEDL_INS_MEMSIZE_WORDS_NPEC     4096
+
+#define IX_NPEDL_DATA_MEMSIZE_WORDS_NPEA    4096
+#define IX_NPEDL_DATA_MEMSIZE_WORDS_NPEB    4096
+#define IX_NPEDL_DATA_MEMSIZE_WORDS_NPEC    4096
+#endif
+
+/* BAR offsets */
+#define IX_NPEDL_REG_OFFSET_EXAD             0x00000000	/* Execution Address */
+#define IX_NPEDL_REG_OFFSET_EXDATA           0x00000004	/* Execution Data */
+#define IX_NPEDL_REG_OFFSET_EXCTL            0x00000008	/* Execution Control */
+#define IX_NPEDL_REG_OFFSET_EXCT 	     0x0000000C	/* Execution Count */
+#define IX_NPEDL_REG_OFFSET_AP0	             0x00000010	/* Action Point 0 */
+#define IX_NPEDL_REG_OFFSET_AP1	             0x00000014	/* Action Point 1 */
+#define IX_NPEDL_REG_OFFSET_AP2	             0x00000018	/* Action Point 2 */
+#define IX_NPEDL_REG_OFFSET_AP3	             0x0000001C	/* Action Point 3 */
+#define IX_NPEDL_REG_OFFSET_WFIFO            0x00000020	/* Watchpoint FIFO */
+#define IX_NPEDL_REG_OFFSET_WC	             0x00000024	/* Watch Count */
+#define IX_NPEDL_REG_OFFSET_PROFCT           0x00000028	/* Profile Count */
+#define IX_NPEDL_REG_OFFSET_STAT	     0x0000002C	/* Messaging Status */
+#define IX_NPEDL_REG_OFFSET_CTL	             0x00000030	/* Messaging Control */
+#define IX_NPEDL_REG_OFFSET_MBST	     0x00000034	/* Mailbox Status */
+#define IX_NPEDL_REG_OFFSET_FIFO	     0x00000038	/* Message FIFO */
+
+/*
+ * Reset value for Mailbox (MBST) register
+ * NOTE that if used, it should be complemented with an NPE intruction
+ * to clear the Mailbox at the NPE side as well
+ */
+#define IX_NPEDL_REG_RESET_MBST              0x0000F0F0
+
+#define IX_NPEDL_MASK_WFIFO_VALID            0x80000000	/* VALID bit */
+#define IX_NPEDL_MASK_STAT_OFNE              0x00010000	/* OFNE bit */
+#define IX_NPEDL_MASK_STAT_IFNE              0x00080000	/* IFNE bit */
+
+/*
+ * EXCTL (Execution Control) Register commands 
+*/
+#define IX_NPEDL_EXCTL_CMD_NPE_STEP          0x01	/* Step 1 instruction */
+#define IX_NPEDL_EXCTL_CMD_NPE_START         0x02	/* Start execution */
+#define IX_NPEDL_EXCTL_CMD_NPE_STOP          0x03	/* Stop execution */
+#define IX_NPEDL_EXCTL_CMD_NPE_CLR_PIPE      0x04	/* Clear ins pipeline */
+
+/*
+ * Read/write operations use address in EXAD and data in EXDATA.
+ */
+#define IX_NPEDL_EXCTL_CMD_RD_INS_MEM        0x10	/* Read ins memory */
+#define IX_NPEDL_EXCTL_CMD_WR_INS_MEM        0x11	/* Write ins memory */
+#define IX_NPEDL_EXCTL_CMD_RD_DATA_MEM       0x12	/* Read data memory */
+#define IX_NPEDL_EXCTL_CMD_WR_DATA_MEM       0x13	/* Write data memory */
+#define IX_NPEDL_EXCTL_CMD_RD_ECS_REG        0x14	/* Read ECS register */
+#define IX_NPEDL_EXCTL_CMD_WR_ECS_REG        0x15	/* Write ECS register */
+
+#define IX_NPEDL_EXCTL_CMD_CLR_PROFILE_CNT   0x0C	/* Clear Profile Count register */
+
+
+/*
+ * EXCTL (Execution Control) Register status bit masks
+ */
+#define IX_NPEDL_EXCTL_STATUS_RUN            0x80000000
+#define IX_NPEDL_EXCTL_STATUS_STOP           0x40000000
+#define IX_NPEDL_EXCTL_STATUS_CLEAR          0x20000000
+#define IX_NPEDL_EXCTL_STATUS_ECS_K          0x00800000	/* pipeline Klean */
+
+/*
+ * Executing Context Stack (ECS) level registers 
+ */
+#define IX_NPEDL_ECS_BG_CTXT_REG_0           0x00	/* reg 0 @ bg ctx */
+#define IX_NPEDL_ECS_BG_CTXT_REG_1           0x01	/* reg 1 @ bg ctx */
+#define IX_NPEDL_ECS_BG_CTXT_REG_2           0x02	/* reg 2 @ bg ctx */
+
+#define IX_NPEDL_ECS_PRI_1_CTXT_REG_0        0x04	/* reg 0 @ pri 1 ctx */
+#define IX_NPEDL_ECS_PRI_1_CTXT_REG_1        0x05	/* reg 1 @ pri 1 ctx */
+#define IX_NPEDL_ECS_PRI_1_CTXT_REG_2        0x06	/* reg 2 @ pri 1 ctx */
+
+#define IX_NPEDL_ECS_PRI_2_CTXT_REG_0        0x08	/* reg 0 @ pri 2 ctx */
+#define IX_NPEDL_ECS_PRI_2_CTXT_REG_1        0x09	/* reg 1 @ pri 2 ctx */
+#define IX_NPEDL_ECS_PRI_2_CTXT_REG_2        0x0A	/* reg 2 @ pri 2 ctx */
+
+#define IX_NPEDL_ECS_DBG_CTXT_REG_0          0x0C	/* reg 0 @ debug ctx */
+#define IX_NPEDL_ECS_DBG_CTXT_REG_1          0x0D	/* reg 1 @ debug ctx */
+#define IX_NPEDL_ECS_DBG_CTXT_REG_2          0x0E	/* reg 2 @ debug ctx */
+
+#define IX_NPEDL_ECS_INSTRUCT_REG            0x11	/* Instruction reg */
+
+/*
+ * Execution Access register reset values
+ */
+#define IX_NPEDL_ECS_BG_CTXT_REG_0_RESET     0xA0000000
+#define IX_NPEDL_ECS_BG_CTXT_REG_1_RESET     0x01000000
+#define IX_NPEDL_ECS_BG_CTXT_REG_2_RESET     0x00008000
+#define IX_NPEDL_ECS_PRI_1_CTXT_REG_0_RESET  0x20000080
+#define IX_NPEDL_ECS_PRI_1_CTXT_REG_1_RESET  0x01000000
+#define IX_NPEDL_ECS_PRI_1_CTXT_REG_2_RESET  0x00008000
+#define IX_NPEDL_ECS_PRI_2_CTXT_REG_0_RESET  0x20000080
+#define IX_NPEDL_ECS_PRI_2_CTXT_REG_1_RESET  0x01000000
+#define IX_NPEDL_ECS_PRI_2_CTXT_REG_2_RESET  0x00008000
+#define IX_NPEDL_ECS_DBG_CTXT_REG_0_RESET    0x20000000
+#define IX_NPEDL_ECS_DBG_CTXT_REG_1_RESET    0x00000000
+#define IX_NPEDL_ECS_DBG_CTXT_REG_2_RESET    0x001E0000
+#define IX_NPEDL_ECS_INSTRUCT_REG_RESET      0x1003C00F
+
+/*
+ * Masks used to read/write particular bits in Execution Access registers
+ */
+
+#define IX_NPEDL_MASK_ECS_REG_0_ACTIVE       0x80000000	/* Active bit */
+#define IX_NPEDL_MASK_ECS_REG_0_NEXTPC       0x1FFF0000	/* NextPC bits */
+#define IX_NPEDL_MASK_ECS_REG_0_LDUR         0x00000700	/* LDUR bits */
+
+#define IX_NPEDL_MASK_ECS_REG_1_CCTXT        0x000F0000	/* NextPC bits */
+#define IX_NPEDL_MASK_ECS_REG_1_SELCTXT      0x0000000F
+
+#define IX_NPEDL_MASK_ECS_DBG_REG_2_IF       0x00100000	/* IF bit */
+#define IX_NPEDL_MASK_ECS_DBG_REG_2_IE       0x00080000	/* IE bit */
+
+
+/*
+ * Bit-Offsets from LSB of particular bit-fields in Execution Access registers.
+ */
+
+#define IX_NPEDL_OFFSET_ECS_REG_0_NEXTPC     16 
+#define IX_NPEDL_OFFSET_ECS_REG_0_LDUR        8
+
+#define IX_NPEDL_OFFSET_ECS_REG_1_CCTXT      16
+#define IX_NPEDL_OFFSET_ECS_REG_1_SELCTXT     0
+
+/*
+ * NPE core & co-processor instruction templates to load into NPE Instruction 
+ * Register, for read/write of NPE register file registers.
+ */
+
+/*
+ * Read an 8-bit NPE internal logical register
+ * and return the value in the EXDATA register (aligned to MSB).
+ * NPE Assembler instruction:  "mov8 d0, d0  &&& DBG_WrExec"
+ */
+#define IX_NPEDL_INSTR_RD_REG_BYTE    0x0FC00000
+
+/*
+ * Read a 16-bit NPE internal logical register
+ * and return the value in the EXDATA register (aligned to MSB).
+ * NPE Assembler instruction:  "mov16 d0, d0  &&& DBG_WrExec"
+ */
+#define IX_NPEDL_INSTR_RD_REG_SHORT   0x0FC08010
+
+/*
+ * Read a 16-bit NPE internal logical register
+ * and return the value in the EXDATA register.
+ * NPE Assembler instruction:  "mov32 d0, d0  &&& DBG_WrExec"
+ */
+#define IX_NPEDL_INSTR_RD_REG_WORD    0x0FC08210
+
+/*
+ * Write an 8-bit NPE internal logical register.
+ * NPE Assembler instruction:  "mov8 d0, #0"
+ */
+#define IX_NPEDL_INSTR_WR_REG_BYTE    0x00004000
+
+/*
+ * Write a 16-bit NPE internal logical register.
+ * NPE Assembler instruction:  "mov16 d0, #0"
+ */
+#define IX_NPEDL_INSTR_WR_REG_SHORT   0x0000C000
+
+/*
+ * Write a 16-bit NPE internal logical register.
+ * NPE Assembler instruction:  "cprd32 d0    &&& DBG_RdInFIFO"
+ */
+#define IX_NPEDL_INSTR_RD_FIFO        0x0F888220    
+
+/*
+ * Reset Mailbox (MBST) register
+ * NPE Assembler instruction:  "mov32 d0, d0  &&& DBG_ClearM"
+ */
+#define IX_NPEDL_INSTR_RESET_MBOX     0x0FAC8210
+
+
+/*
+ * Bit-offsets from LSB, of particular bit-fields in an NPE instruction
+ */
+#define IX_NPEDL_OFFSET_INSTR_SRC              4	/* src operand */
+#define IX_NPEDL_OFFSET_INSTR_DEST             9	/* dest operand */
+#define IX_NPEDL_OFFSET_INSTR_COPROC          18	/* coprocessor ins */
+
+/*
+ * Masks used to read/write particular bits of an NPE Instruction
+ */
+
+/**
+ * Mask the bits of 16-bit data value (least-sig 5 bits) to be used in
+ * SRC field of immediate-mode NPE instruction
+ */
+#define IX_NPEDL_MASK_IMMED_INSTR_SRC_DATA         0x1F 
+
+/**
+ * Mask the bits of 16-bit data value (most-sig 11 bits) to be used in
+ * COPROC field of immediate-mode NPE instruction
+ */
+#define IX_NPEDL_MASK_IMMED_INSTR_COPROC_DATA      0xFFE0
+
+/**
+ * LSB offset of the bit-field of 16-bit data value (most-sig 11 bits)
+ * to be used in COPROC field of immediate-mode NPE instruction
+ */
+#define IX_NPEDL_OFFSET_IMMED_INSTR_COPROC_DATA    5
+
+/**
+ * Number of left-shifts required to align most-sig 11 bits of 16-bit
+ * data value into COPROC field of immediate-mode NPE instruction
+ */
+#define IX_NPEDL_DISPLACE_IMMED_INSTR_COPROC_DATA \
+     (IX_NPEDL_OFFSET_INSTR_COPROC - IX_NPEDL_OFFSET_IMMED_INSTR_COPROC_DATA)
+
+/**
+ * LDUR value used with immediate-mode NPE Instructions by the NpeDl
+ * for writing to NPE internal logical registers
+ */
+#define IX_NPEDL_WR_INSTR_LDUR                     1
+
+/**
+ * LDUR value used with NON-immediate-mode NPE Instructions by the NpeDl
+ * for reading from NPE internal logical registers
+ */
+#define IX_NPEDL_RD_INSTR_LDUR                     0
+
+
+/**
+ * NPE internal Context Store registers.
+ */
+typedef enum
+{
+    IX_NPEDL_CTXT_REG_STEVT = 0,  /**< identifies STEVT   */
+    IX_NPEDL_CTXT_REG_STARTPC,    /**< identifies STARTPC */
+    IX_NPEDL_CTXT_REG_REGMAP,     /**< identifies REGMAP  */
+    IX_NPEDL_CTXT_REG_CINDEX,     /**< identifies CINDEX  */
+    IX_NPEDL_CTXT_REG_MAX         /**< Total number of Context Store registers */
+} IxNpeDlCtxtRegNum;
+
+
+/*
+ * NPE Context Store register logical addresses
+ */
+#define IX_NPEDL_CTXT_REG_ADDR_STEVT      0x0000001B
+#define IX_NPEDL_CTXT_REG_ADDR_STARTPC    0x0000001C
+#define IX_NPEDL_CTXT_REG_ADDR_REGMAP     0x0000001E
+#define IX_NPEDL_CTXT_REG_ADDR_CINDEX     0x0000001F
+
+/*
+ * NPE Context Store register reset values
+ */
+
+/**
+ * Reset value of STEVT NPE internal Context Store register
+ *        (STEVT = off, 0x80)
+ */
+#define IX_NPEDL_CTXT_REG_RESET_STEVT     0x80
+
+/**
+ * Reset value of STARTPC NPE internal Context Store register
+ *        (STARTPC = 0x0000)
+ */
+#define IX_NPEDL_CTXT_REG_RESET_STARTPC   0x0000
+
+/**
+ * Reset value of REGMAP NPE internal Context Store register
+ *        (REGMAP = d0->p0, d8->p2, d16->p4)
+ */
+#define IX_NPEDL_CTXT_REG_RESET_REGMAP    0x0820
+
+/**
+ * Reset value of CINDEX NPE internal Context Store register
+ *        (CINDEX = 0)
+ */
+#define IX_NPEDL_CTXT_REG_RESET_CINDEX    0x00
+
+
+/*
+ * Numeric range of context levels available on an NPE
+ */
+#define IX_NPEDL_CTXT_NUM_MIN             0
+#define IX_NPEDL_CTXT_NUM_MAX             15
+
+
+/**
+ * Number of Physical registers currently supported
+ *        Initial NPE implementations will have a 32-word register file.
+ *        Later implementations may have a 64-word register file.
+ */
+#define IX_NPEDL_TOTAL_NUM_PHYS_REG               32
+
+/**
+ * LSB-offset of Regmap number in Physical NPE register address, used
+ *        for Physical To Logical register address mapping in the NPE
+ */
+#define IX_NPEDL_OFFSET_PHYS_REG_ADDR_REGMAP      1
+
+/**
+ * Mask to extract a logical NPE register address from a physical
+ *        register address, used for Physical To Logical address mapping
+ */
+#define IX_NPEDL_MASK_PHYS_REG_ADDR_LOGICAL_ADDR   0x1
+
+/*
+ * NPE Message/Mailbox interface.
+ */
+#define	IX_NPESTAT	IX_NPEDL_REG_OFFSET_STAT	/* status register */
+#define	IX_NPECTL	IX_NPEDL_REG_OFFSET_CTL		/* control register */
+#define	IX_NPEFIFO	IX_NPEDL_REG_OFFSET_FIFO	/* FIFO register */
+
+/* control register */
+#define	IX_NPECTL_OFE		0x00010000	/* output fifo enable */
+#define	IX_NPECTL_IFE		0x00020000	/* input fifo enable */
+#define	IX_NPECTL_OFWE		0x01000000	/* output fifo write enable */
+#define	IX_NPECTL_IFWE		0x02000000	/* input fifo write enable */
+
+/* status register */
+#define	IX_NPESTAT_OFNE		0x00010000	/* output fifo not empty */
+#define	IX_NPESTAT_IFNF		0x00020000	/* input fifo not full */
+#define	IX_NPESTAT_OFNF		0x00040000	/* output fifo not full */
+#define	IX_NPESTAT_IFNE		0x00080000	/* input fifo not empty */
+#define	IX_NPESTAT_MBINT	0x00100000	/* Mailbox interrupt */
+#define	IX_NPESTAT_IFINT	0x00200000	/* input fifo interrupt */
+#define	IX_NPESTAT_OFINT	0x00400000	/* output fifo interrupt */
+#define	IX_NPESTAT_WFINT	0x00800000	/* watch fifo interrupt */
+#endif /* _IXP425_NPEREG_H_ */
diff --git a/sys/arm/xscale/ixp425/ixp425_npevar.h b/sys/arm/xscale/ixp425/ixp425_npevar.h
new file mode 100644
index 000000000000..c30ff5f55117
--- /dev/null
+++ b/sys/arm/xscale/ixp425/ixp425_npevar.h
@@ -0,0 +1,96 @@
+/*-
+ * Copyright (c) 2006 Sam Leffler.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _IXP425_NPEVAR_H_
+#define _IXP425_NPEVAR_H_
+
+/*
+ * Intel (R) IXP400 Software NPE Image ID Definition
+ *
+ * Firmware Id's for current firmware image.  These are typed by
+ * NPE ID and the feature set.  Not all features are available
+ * on all NPE's.
+ *
+ * HSS-0: supports 32 channelized and 4 packetized.
+ * HSS-0 + ATM + SPHY:
+ *    For HSS, 16/32 channelized and 4/0 packetized.
+ *    For ATM, AAL5, AAL0 and OAM for UTOPIA SPHY, 1 logical port, 32 VCs.
+ *    Fast Path support.
+ * HSS-0 + ATM + MPHY:
+ *    For HSS, 16/32 channelized and 4/0 packetized.
+ *    For ATM, AAL5, AAL0 and OAM for UTOPIA MPHY, 1 logical port, 32 VCs.
+ *    Fast Path support.
+ * ATM-Only:
+ *    AAL5, AAL0 and OAM for UTOPIA MPHY, 12 logical ports, 32 VCs.
+ *    Fast Path support.
+ * HSS-2:
+ *    HSS-0 and HSS-1.
+ *    Each HSS port supports 32 channelized and 4 packetized.
+ * ETH: Ethernet Rx/Tx which includes:
+ *    MAC_FILTERING, MAC_LEARNING, SPANNING_TREE, FIREWALL
+ * ETH+VLAN Ethernet Rx/Tx which includes:
+ *    MAC_FILTERING, MAC_LEARNING, SPANNING_TREE, FIREWALL, VLAN_QOS
+ * ETH+VLAN+HDR: Ethernet Rx/Tx which includes:
+ *    SPANNING_TREE, FIREWALL, VLAN_QOS, HEADER_CONVERSION
+ */
+/* XXX not right, revise */
+/* NPE A Firmware Image Id's */
+#define	NPEFW_A_HSS0		0x00010000 /* HSS-0: 32 chan+4 packet */
+#define NPEFW_A_HSS0_ATM_S_1	0x00020000 /* HSS-0+ATM UTOPIA SPHY (1 port) */
+#define NPEFW_A_HSS0_ATM_M_1	0x00020000 /* HSS-0+ATM UTOPIA MPHY (1 port) */
+#define NPEFW_A_ATM_M_12	0x00040000 /* ATM UTOPIA MPHY (12 ports) */
+#define NPEFW_A_DMA		0x00150100 /* DMA only */
+#define	NPEFW_A_HSS2		0x00090000 /* HSS-0 + HSS-1 */
+#define	NPEFW_A_ETH		0x10800200 /* Basic Ethernet */
+#define	NPEFW_A_ETH_VLAN	0x10810200 /* NPEFW_A_ETH + VLAN QoS */
+#define	NPEFW_A_ETH_VLAN_HDR	0x10820200 /* NPEFW_A_ETH_VLAN + Hdr conv */
+/* XXX ... more not included */
+
+/* NPE B Firmware Image Id's */
+#define NPEFW_B_ETH		0x01000200 /* Basic Ethernet */
+#define NPEFW_B_ETH_VLAN	0x01010200 /* NPEFW_B_ETH + VLAN QoS */
+#define NPEFW_B_ETH_VLAN_HDR	0x01020201 /* NPEFW_B_ETH_VLAN + Hdr conv */
+#define NPEFW_B_DMA		0x01020100 /* DMA only */
+/* XXX ... more not include */
+
+#define	IXP425_NPE_B_IMAGEID	0x01000200
+#define	IXP425_NPE_C_IMAGEID	0x02000200
+
+struct ixpnpe_softc;
+struct ixpnpe_softc *ixpnpe_attach(device_t);
+void	ixpnpe_detach(struct ixpnpe_softc *);
+int	ixpnpe_stopandreset(struct ixpnpe_softc *);
+int	ixpnpe_start(struct ixpnpe_softc *);
+int	ixpnpe_stop(struct ixpnpe_softc *);
+int	ixpnpe_init(struct ixpnpe_softc *,
+		const char *imageName, uint32_t imageId);
+int	ixpnpe_getfunctionality(struct ixpnpe_softc *sc);
+
+int	ixpnpe_sendmsg(struct ixpnpe_softc *, const uint32_t msg[2]);
+int	ixpnpe_recvmsg(struct ixpnpe_softc *, uint32_t msg[2]);
+int	ixpnpe_sendandrecvmsg(struct ixpnpe_softc *, const uint32_t send[2],
+		uint32_t recv[2]);
+#endif /* _IXP425_NPEVAR_H_ */
diff --git a/sys/arm/xscale/ixp425/ixp425_pci.c b/sys/arm/xscale/ixp425/ixp425_pci.c
new file mode 100644
index 000000000000..adb9b16d93eb
--- /dev/null
+++ b/sys/arm/xscale/ixp425/ixp425_pci.c
@@ -0,0 +1,455 @@
+/*	$NetBSD: ixp425_pci.c,v 1.5 2006/04/10 03:36:03 simonb Exp $ */
+
+/*
+ * Copyright (c) 2003
+ *	Ichiro FUKUHARA <ichiro@ichiro.org>.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by Ichiro FUKUHARA.
+ * 4. The name of the company nor the name of the author may be used to
+ *    endorse or promote products derived from this software without specific
+ *    prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/malloc.h>
+#include <sys/bus.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/rman.h>
+
+#include <machine/bus.h>
+#include <machine/cpu.h>
+#include <machine/pcb.h>
+#include <vm/vm.h>
+#include <vm/pmap.h>
+#include <vm/vm_extern.h>
+#include <machine/pmap.h>
+
+#include <arm/xscale/ixp425/ixp425reg.h>
+#include <arm/xscale/ixp425/ixp425var.h>
+
+#include <dev/pci/pcib_private.h>
+#include "pcib_if.h"
+
+#include <dev/pci/pcireg.h>
+extern struct ixp425_softc *ixp425_softc;
+
+#define	PCI_CSR_WRITE_4(sc, reg, data)	\
+	bus_write_4(sc->sc_csr, reg, data)
+
+#define	PCI_CSR_READ_4(sc, reg)	\
+	bus_read_4(sc->sc_csr, reg)
+
+#define PCI_CONF_LOCK(s)	(s) = disable_interrupts(I32_bit)
+#define PCI_CONF_UNLOCK(s)	restore_interrupts((s))
+
+static device_probe_t ixppcib_probe;
+static device_attach_t ixppcib_attach;
+static bus_read_ivar_t ixppcib_read_ivar;
+static bus_write_ivar_t ixppcib_write_ivar;
+static bus_setup_intr_t ixppcib_setup_intr;
+static bus_teardown_intr_t ixppcib_teardown_intr;
+static bus_alloc_resource_t ixppcib_alloc_resource;
+static bus_activate_resource_t ixppcib_activate_resource;
+static bus_deactivate_resource_t ixppcib_deactivate_resource;
+static bus_release_resource_t ixppcib_release_resource;
+static pcib_maxslots_t ixppcib_maxslots;
+static pcib_read_config_t ixppcib_read_config;
+static pcib_write_config_t ixppcib_write_config;
+static pcib_route_interrupt_t ixppcib_route_interrupt;
+
+static int
+ixppcib_probe(device_t dev)
+{
+
+	device_set_desc(dev, "IXP425 PCI Bus");
+        return (0);
+}
+
+static void
+ixp425_pci_conf_reg_write(struct ixppcib_softc *sc, uint32_t reg,
+    uint32_t data)
+{
+	PCI_CSR_WRITE_4(sc,
+	    PCI_CRP_AD_CBE, ((reg & ~3) | COMMAND_CRP_WRITE));
+	PCI_CSR_WRITE_4(sc,
+	    PCI_CRP_AD_WDATA, data);
+}
+
+static int
+ixppcib_attach(device_t dev)
+{
+	int rid;
+	struct ixppcib_softc *sc;
+
+	sc = device_get_softc(dev);
+
+	rid = 0;
+	sc->sc_csr = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
+	    IXP425_PCI_HWBASE, IXP425_PCI_HWBASE + IXP425_PCI_SIZE,
+	    IXP425_PCI_SIZE, RF_ACTIVE);
+	if (sc->sc_csr == NULL)
+		panic("cannot allocate PCI CSR registers");
+
+	ixp425_md_attach(dev);
+	/* always setup the base, incase another OS messes w/ it */
+	PCI_CSR_WRITE_4(sc, PCI_PCIMEMBASE, 0x48494a4b);
+
+	rid = 0;
+	sc->sc_mem = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
+	    IXP425_PCI_MEM_HWBASE, IXP425_PCI_MEM_HWBASE + IXP425_PCI_MEM_SIZE,
+	    IXP425_PCI_MEM_SIZE, RF_ACTIVE);
+	if (sc->sc_mem == NULL)
+		panic("cannot allocate PCI MEM space");
+
+	/*
+	 * Initialize the bus space tags.
+	 */
+	ixp425_io_bs_init(&sc->sc_pci_iot, sc);
+	ixp425_mem_bs_init(&sc->sc_pci_memt, sc);
+
+	sc->sc_dev = dev;
+
+	/* Initialize memory and i/o rmans. */
+	sc->sc_io_rman.rm_type = RMAN_ARRAY;
+	sc->sc_io_rman.rm_descr = "IXP425 PCI I/O Ports";
+	if (rman_init(&sc->sc_io_rman) != 0 ||
+		rman_manage_region(&sc->sc_io_rman, 0, 
+	    	    IXP425_PCI_IO_SIZE) != 0) {
+		panic("ixppcib_probe: failed to set up I/O rman");
+	}
+
+	sc->sc_mem_rman.rm_type = RMAN_ARRAY;
+	sc->sc_mem_rman.rm_descr = "IXP425 PCI Memory";
+	if (rman_init(&sc->sc_mem_rman) != 0 ||
+		rman_manage_region(&sc->sc_mem_rman, IXP425_PCI_MEM_HWBASE,
+		    IXP425_PCI_MEM_HWBASE + IXP425_PCI_MEM_SIZE) != 0) {
+		panic("ixppcib_probe: failed to set up memory rman");
+	}
+
+	/*
+	 * PCI->AHB address translation
+	 * 	begin at the physical memory start + OFFSET
+	 */
+#define	AHB_OFFSET	0x10000000UL
+	PCI_CSR_WRITE_4(sc, PCI_AHBMEMBASE,
+	    (AHB_OFFSET & 0xFF000000) +
+	    ((AHB_OFFSET & 0xFF000000) >> 8) +
+	    ((AHB_OFFSET & 0xFF000000) >> 16) +
+	    ((AHB_OFFSET & 0xFF000000) >> 24) +
+	    0x00010203);
+	
+#define IXPPCIB_WRITE_CONF(sc, reg, val) \
+	ixp425_pci_conf_reg_write(sc, reg, val)
+	/* Write Mapping registers PCI Configuration Registers */
+	/* Base Address 0 - 3 */
+	IXPPCIB_WRITE_CONF(sc, PCI_MAPREG_BAR0, AHB_OFFSET + 0x00000000);
+	IXPPCIB_WRITE_CONF(sc, PCI_MAPREG_BAR1, AHB_OFFSET + 0x01000000);
+	IXPPCIB_WRITE_CONF(sc, PCI_MAPREG_BAR2, AHB_OFFSET + 0x02000000);
+	IXPPCIB_WRITE_CONF(sc, PCI_MAPREG_BAR3, AHB_OFFSET + 0x03000000);
+	
+	/* Base Address 4 */
+	IXPPCIB_WRITE_CONF(sc, PCI_MAPREG_BAR4, 0xffffffff);
+	
+	/* Base Address 5 */
+	IXPPCIB_WRITE_CONF(sc, PCI_MAPREG_BAR5, 0x00000000);
+	
+	/* Assert some PCI errors */
+	PCI_CSR_WRITE_4(sc, PCI_ISR, ISR_AHBE | ISR_PPE | ISR_PFE | ISR_PSE);
+	
+#ifdef __ARMEB__
+	/*
+	 * Set up byte lane swapping between little-endian PCI
+	 * and the big-endian AHB bus
+	 */
+	PCI_CSR_WRITE_4(sc, PCI_CSR, CSR_IC | CSR_ABE | CSR_PDS);
+#else
+	PCI_CSR_WRITE_4(sc, PCI_CSR, CSR_IC | CSR_ABE);
+#endif
+	
+	/*
+	 * Enable bus mastering and I/O,memory access
+	 */
+	IXPPCIB_WRITE_CONF(sc, PCIR_COMMAND,
+	    PCIM_CMD_MEMEN | PCIM_CMD_BUSMASTEREN);
+	
+	/*
+	 * Wait some more to ensure PCI devices have stabilised.
+	 */
+	DELAY(50000);
+
+	device_add_child(dev, "pci", -1);
+	return (bus_generic_attach(dev));
+}
+
+static int
+ixppcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
+{
+	struct ixppcib_softc *sc;
+
+	sc = device_get_softc(dev);
+	switch (which) {
+	case PCIB_IVAR_BUS:
+		*result = sc->sc_bus;
+		return (0);
+	}
+
+	return (ENOENT);
+}
+
+static int
+ixppcib_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
+{
+	struct ixppcib_softc *sc;
+
+	sc = device_get_softc(dev);
+	switch (which) {
+	case PCIB_IVAR_BUS:
+		sc->sc_bus = value;
+		return (0);
+	}
+
+	return (ENOENT);
+}
+
+static int
+ixppcib_setup_intr(device_t dev, device_t child, struct resource *ires,
+    int flags, driver_intr_t *intr, void *arg, void **cookiep)
+{
+
+	return (BUS_SETUP_INTR(device_get_parent(dev), child, ires, flags,
+	    intr, arg, cookiep));
+}
+
+static int
+ixppcib_teardown_intr(device_t dev, device_t child, struct resource *vec,
+     void *cookie)
+{
+
+	return (BUS_TEARDOWN_INTR(device_get_parent(dev), child, vec, cookie));
+}
+
+static struct resource *
+ixppcib_alloc_resource(device_t bus, device_t child, int type, int *rid,
+    u_long start, u_long end, u_long count, u_int flags)
+{
+	bus_space_tag_t tag;
+	struct ixppcib_softc *sc = device_get_softc(bus);
+	struct rman *rmanp;
+	struct resource *rv;
+
+	tag = NULL; /* shut up stupid gcc */
+	rv = NULL;
+	switch (type) {
+	case SYS_RES_IRQ:
+		rmanp = &sc->sc_irq_rman;
+		break;
+
+	case SYS_RES_IOPORT:
+		rmanp = &sc->sc_io_rman;
+		tag = &sc->sc_pci_iot;
+		break;
+
+	case SYS_RES_MEMORY:
+		rmanp = &sc->sc_mem_rman;
+		tag = &sc->sc_pci_memt;
+		break;
+
+	default:
+		return (rv);
+	}
+
+	rv = rman_reserve_resource(rmanp, start, end, count, flags, child);
+	if (rv != NULL) {
+		rman_set_rid(rv, *rid);
+		if (type == SYS_RES_IOPORT) {
+			rman_set_bustag(rv, tag);
+			rman_set_bushandle(rv, rman_get_start(rv));
+		} else if (type == SYS_RES_MEMORY) {
+			rman_set_bustag(rv, tag);
+			rman_set_bushandle(rv, rman_get_bushandle(sc->sc_mem) +
+			    (rman_get_start(rv) - IXP425_PCI_MEM_HWBASE));
+		}
+	}
+
+	return (rv);
+}
+
+static int
+ixppcib_activate_resource(device_t bus, device_t child, int type, int rid,
+    struct resource *r) 
+{
+
+	device_printf(bus, "%s called activate_resource\n", device_get_nameunit(child));
+	return (ENXIO);
+}
+
+static int
+ixppcib_deactivate_resource(device_t bus, device_t child, int type, int rid,
+    struct resource *r) 
+{
+
+	device_printf(bus, "%s called deactivate_resource\n", device_get_nameunit(child));
+	return (ENXIO);
+}
+
+static int
+ixppcib_release_resource(device_t bus, device_t child, int type, int rid,
+    struct resource *r)
+{
+
+	device_printf(bus, "%s called release_resource\n", device_get_nameunit(child));
+	return (ENXIO);
+}
+
+static void
+ixppcib_conf_setup(struct ixppcib_softc *sc, int bus, int slot, int func,
+    int reg)
+{
+	if (bus == 0) {
+		if (slot == 0 && func == 0) {
+			PCI_CSR_WRITE_4(sc, PCI_NP_AD, (reg & ~3));
+		} else {
+			bus &= 0xff;
+			slot &= 0x1f;
+			func &= 0x07;
+			/* configuration type 0 */
+			PCI_CSR_WRITE_4(sc, PCI_NP_AD, (1U << (32 - slot)) |
+				(func << 8) | (reg & ~3));
+		}
+	} else {
+			/* configuration type 1 */
+		PCI_CSR_WRITE_4(sc, PCI_NP_AD,
+			(bus << 16) | (slot << 11) |
+			(func << 8) | (reg & ~3) | 1);
+	}
+
+}
+
+static int
+ixppcib_maxslots(device_t dev)
+{
+
+	return (PCI_SLOTMAX);
+}
+
+static u_int32_t
+ixppcib_read_config(device_t dev, u_int bus, u_int slot, u_int func, u_int reg,
+    int bytes)
+{
+	struct ixppcib_softc *sc = device_get_softc(dev);
+	u_int32_t data, ret;
+
+	ixppcib_conf_setup(sc, bus, slot, func, reg & ~3);
+
+	PCI_CSR_WRITE_4(sc, PCI_NP_CBE, COMMAND_NP_CONF_READ);
+	ret = PCI_CSR_READ_4(sc, PCI_NP_RDATA);
+	ret >>= (reg & 3) * 8;
+	ret &= 0xffffffff >> ((4 - bytes) * 8);
+#if 0
+	device_printf(dev, "read config: %u:%u:%u %#x(%d) = %#x\n", bus, slot, func, reg, bytes, ret);
+#endif
+
+	/* check & clear PCI abort */
+	data = PCI_CSR_READ_4(sc, PCI_ISR);
+	if (data & ISR_PFE) {
+		PCI_CSR_WRITE_4(sc, PCI_ISR, ISR_PFE);
+		return (-1);
+	}
+	return (ret);
+}
+
+static const int byteenables[] = { 0, 0x10, 0x30, 0x70, 0xf0 };
+
+static void
+ixppcib_write_config(device_t dev, u_int bus, u_int slot, u_int func, u_int reg,
+    u_int32_t val, int bytes)
+{
+	struct ixppcib_softc *sc = device_get_softc(dev);
+	u_int32_t data;
+
+#if 0
+	device_printf(dev, "write config: %u:%u:%u %#x(%d) = %#x\n", bus, slot, func, reg, bytes, val);
+#endif
+
+	ixppcib_conf_setup(sc, bus, slot, func, reg & ~3);
+
+	/* Byte enables are active low, so not them first */
+	PCI_CSR_WRITE_4(sc, PCI_NP_CBE, COMMAND_NP_CONF_WRITE |
+	    (~(byteenables[bytes] << (reg & 3)) & 0xf0));
+	PCI_CSR_WRITE_4(sc, PCI_NP_WDATA, val << ((reg & 3) * 8));
+
+	/* check & clear PCI abort */
+	data = PCI_CSR_READ_4(sc, PCI_ISR);
+	if (data & ISR_PFE)
+		PCI_CSR_WRITE_4(sc, PCI_ISR, ISR_PFE);
+}
+
+static int
+ixppcib_route_interrupt(device_t bridge, device_t device, int pin)
+{
+
+	return (ixp425_md_route_interrupt(bridge, device, pin));
+}
+
+static device_method_t ixppcib_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_probe,			ixppcib_probe),
+	DEVMETHOD(device_attach,		ixppcib_attach),
+
+	/* Bus interface */
+	DEVMETHOD(bus_print_child,		bus_generic_print_child),
+	DEVMETHOD(bus_read_ivar,		ixppcib_read_ivar),
+	DEVMETHOD(bus_write_ivar,		ixppcib_write_ivar),
+	DEVMETHOD(bus_setup_intr,		ixppcib_setup_intr),
+	DEVMETHOD(bus_teardown_intr,		ixppcib_teardown_intr),
+	DEVMETHOD(bus_alloc_resource,		ixppcib_alloc_resource),
+	DEVMETHOD(bus_activate_resource,	ixppcib_activate_resource),
+	DEVMETHOD(bus_deactivate_resource,	ixppcib_deactivate_resource),
+	DEVMETHOD(bus_release_resource,		ixppcib_release_resource),
+	/* DEVMETHOD(bus_get_dma_tag,		ixppcib_get_dma_tag), */
+
+	/* pcib interface */
+	DEVMETHOD(pcib_maxslots,		ixppcib_maxslots),
+	DEVMETHOD(pcib_read_config,		ixppcib_read_config),
+	DEVMETHOD(pcib_write_config,		ixppcib_write_config),
+	DEVMETHOD(pcib_route_interrupt,		ixppcib_route_interrupt),
+
+	{0, 0},
+};
+
+static driver_t ixppcib_driver = {
+	"pcib",
+	ixppcib_methods,
+	sizeof(struct ixppcib_softc),
+};
+static devclass_t ixppcib_devclass;
+
+DRIVER_MODULE(ixppcib, ixp, ixppcib_driver, ixppcib_devclass, 0, 0);
diff --git a/sys/arm/xscale/ixp425/ixp425_pci_asm.S b/sys/arm/xscale/ixp425/ixp425_pci_asm.S
new file mode 100644
index 000000000000..f686d6577f09
--- /dev/null
+++ b/sys/arm/xscale/ixp425/ixp425_pci_asm.S
@@ -0,0 +1,102 @@
+/*	$NetBSD: ixp425_pci_asm.S,v 1.2 2005/12/11 12:16:51 christos Exp $	*/
+
+/*
+ * Copyright (c) 2003 Wasabi Systems, Inc.
+ * All rights reserved.
+ *
+ * Written by Jason R. Thorpe for Wasabi Systems, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed for the NetBSD Project by
+ *	Wasabi Systems, Inc.
+ * 4. The name of Wasabi Systems, Inc. may not be used to endorse
+ *    or promote products derived from this software without specific prior
+ *    written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ *
+ */
+
+#include <machine/asm.h>
+
+/*
+ * Bus space functions for IXP425 PCI space access.  We have to swizzle
+ * the address for 1 and 2 byte accesses when in big-endian mode.
+ */
+
+/*
+ * read single
+ */
+
+ENTRY(ixp425_pci_mem_bs_r_1)
+#ifdef __ARMEB__
+	add	r1, r1, r2
+	eor	r1, r1, #0x3
+	ldrb	r0, [r1]
+#else
+	ldrb	r0, [r1, r2]
+#endif /* __ARMEB__ */
+	mov	pc, lr
+
+ENTRY(ixp425_pci_mem_bs_r_2)
+#ifdef __ARMEB__
+	add	r1, r1, r2
+	eor	r1, r1, #0x2
+	ldrh	r0, [r1]
+#else
+	ldrh	r0, [r1, r2]
+#endif /* __ARMEB__ */
+	mov	pc, lr
+
+ENTRY(ixp425_pci_mem_bs_r_4)
+	ldr	r0, [r1, r2]
+	mov	pc, lr
+
+/*
+ * write single
+ */
+
+ENTRY(ixp425_pci_mem_bs_w_1)
+#ifdef __ARMEB__
+	add	r1, r1, r2
+	eor	r1, r1, #0x3
+	strb	r3, [r1]
+#else
+	strb	r3, [r1, r2]
+#endif /* __ARMEB__ */
+	mov	pc, lr
+
+ENTRY(ixp425_pci_mem_bs_w_2)
+#ifdef __ARMEB__
+	add	r1, r1, r2
+	eor	r1, r1, #0x2
+	strh	r3, [r1]
+#else
+	strh	r3, [r1, r2]
+#endif /* __ARMEB__ */
+	mov	pc, lr
+
+ENTRY(ixp425_pci_mem_bs_w_4)
+	str	r3, [r1, r2]
+	mov	pc, lr
diff --git a/sys/arm/xscale/ixp425/ixp425_pci_space.c b/sys/arm/xscale/ixp425/ixp425_pci_space.c
new file mode 100644
index 000000000000..6ee2a1d33180
--- /dev/null
+++ b/sys/arm/xscale/ixp425/ixp425_pci_space.c
@@ -0,0 +1,496 @@
+/*	$NetBSD: ixp425_pci_space.c,v 1.6 2006/04/10 03:36:03 simonb Exp $ */
+
+/*
+ * Copyright (c) 2003
+ *	Ichiro FUKUHARA <ichiro@ichiro.org>.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by Ichiro FUKUHARA.
+ * 4. The name of the company nor the name of the author may be used to
+ *    endorse or promote products derived from this software without specific
+ *    prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+/*
+ * bus_space PCI functions for ixp425
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/endian.h>
+
+#include <machine/pcb.h>
+
+#include <vm/vm.h>
+#include <vm/vm_kern.h>
+#include <vm/pmap.h>
+#include <vm/vm_page.h>
+#include <vm/vm_extern.h>
+
+#include <machine/bus.h>
+
+#include <arm/xscale/ixp425/ixp425reg.h>
+#include <arm/xscale/ixp425/ixp425var.h>
+
+/*
+ * Macros to read/write registers
+*/
+#define CSR_READ_4(x)		*(volatile uint32_t *) \
+	(IXP425_PCI_CSR_BASE + (x))
+#define CSR_WRITE_4(x, v)	*(volatile uint32_t *) \
+	(IXP425_PCI_CSR_BASE + (x)) = (v)
+
+/* Proto types for all the bus_space structure functions */
+bs_protos(ixp425_pci);
+bs_protos(ixp425_pci_io);
+bs_protos(ixp425_pci_mem);
+
+/* special I/O functions */
+static u_int8_t  _pci_io_bs_r_1(void *, bus_space_handle_t, bus_size_t);
+static u_int16_t _pci_io_bs_r_2(void *, bus_space_handle_t, bus_size_t);
+static u_int32_t _pci_io_bs_r_4(void *, bus_space_handle_t, bus_size_t);
+
+static void _pci_io_bs_w_1(void *, bus_space_handle_t, bus_size_t, u_int8_t);
+static void _pci_io_bs_w_2(void *, bus_space_handle_t, bus_size_t, u_int16_t);
+static void _pci_io_bs_w_4(void *, bus_space_handle_t, bus_size_t, u_int32_t);
+
+#ifdef __ARMEB__
+static u_int8_t  _pci_io_bs_r_1_s(void *, bus_space_handle_t, bus_size_t);
+static u_int16_t _pci_io_bs_r_2_s(void *, bus_space_handle_t, bus_size_t);
+static u_int32_t _pci_io_bs_r_4_s(void *, bus_space_handle_t, bus_size_t);
+
+static void _pci_io_bs_w_1_s(void *, bus_space_handle_t, bus_size_t, u_int8_t);
+static void _pci_io_bs_w_2_s(void *, bus_space_handle_t, bus_size_t, u_int16_t);
+static void _pci_io_bs_w_4_s(void *, bus_space_handle_t, bus_size_t, u_int32_t);
+
+static u_int8_t  _pci_mem_bs_r_1(void *, bus_space_handle_t, bus_size_t);
+static u_int16_t _pci_mem_bs_r_2(void *, bus_space_handle_t, bus_size_t);
+static u_int32_t _pci_mem_bs_r_4(void *, bus_space_handle_t, bus_size_t);
+
+static void _pci_mem_bs_w_1(void *, bus_space_handle_t, bus_size_t, u_int8_t);
+static void _pci_mem_bs_w_2(void *, bus_space_handle_t, bus_size_t, u_int16_t);
+static void _pci_mem_bs_w_4(void *, bus_space_handle_t, bus_size_t, u_int32_t);
+#endif
+
+struct bus_space ixp425_pci_io_bs_tag_template = {
+	/* mapping/unmapping */
+	.bs_map		= ixp425_pci_io_bs_map,
+	.bs_unmap	= ixp425_pci_io_bs_unmap,
+	.bs_subregion	= ixp425_pci_bs_subregion,
+
+	.bs_alloc	= ixp425_pci_io_bs_alloc,
+	.bs_free	= ixp425_pci_io_bs_free,
+
+	/* barrier */
+	.bs_barrier	= ixp425_pci_bs_barrier,
+
+	/*
+	 * IXP425 processor does not have PCI I/O windows
+	 */
+	/* read (single) */
+	.bs_r_1		= _pci_io_bs_r_1,
+	.bs_r_2		= _pci_io_bs_r_2,
+	.bs_r_4		= _pci_io_bs_r_4,
+
+	/* write (single) */
+	.bs_w_1		= _pci_io_bs_w_1,
+	.bs_w_2		= _pci_io_bs_w_2,
+	.bs_w_4		= _pci_io_bs_w_4,
+
+#ifdef __ARMEB__
+	.bs_r_1_s	= _pci_io_bs_r_1_s,
+	.bs_r_2_s	= _pci_io_bs_r_2_s,
+	.bs_r_4_s	= _pci_io_bs_r_4_s,
+
+	.bs_w_1_s	= _pci_io_bs_w_1_s,
+	.bs_w_2_s	= _pci_io_bs_w_2_s,
+	.bs_w_4_s	= _pci_io_bs_w_4_s,
+#else
+	.bs_r_1_s	= _pci_io_bs_r_1,
+	.bs_r_2_s	= _pci_io_bs_r_2,
+	.bs_r_4_s	= _pci_io_bs_r_4,
+
+	.bs_w_1_s	= _pci_io_bs_w_1,
+	.bs_w_2_s	= _pci_io_bs_w_2,
+	.bs_w_4_s	= _pci_io_bs_w_4,
+#endif
+};
+
+void
+ixp425_io_bs_init(bus_space_tag_t bs, void *cookie)
+{
+	*bs = ixp425_pci_io_bs_tag_template;
+	bs->bs_cookie = cookie;
+}
+
+struct bus_space ixp425_pci_mem_bs_tag_template = {
+	/* mapping/unmapping */
+	.bs_map		= ixp425_pci_mem_bs_map,
+	.bs_unmap	= ixp425_pci_mem_bs_unmap,
+	.bs_subregion	= ixp425_pci_bs_subregion,
+
+	.bs_alloc	= ixp425_pci_mem_bs_alloc,
+	.bs_free	= ixp425_pci_mem_bs_free,
+
+	/* barrier */
+	.bs_barrier	= ixp425_pci_bs_barrier,
+
+#ifdef __ARMEB__
+	/* read (single) */
+	.bs_r_1_s	= _pci_mem_bs_r_1,
+	.bs_r_2_s	= _pci_mem_bs_r_2,
+	.bs_r_4_s	= _pci_mem_bs_r_4,
+
+	.bs_r_1	= 	ixp425_pci_mem_bs_r_1,
+	.bs_r_2	= 	ixp425_pci_mem_bs_r_2,
+	.bs_r_4	= 	ixp425_pci_mem_bs_r_4,
+
+	/* write (single) */
+	.bs_w_1_s	= _pci_mem_bs_w_1,
+	.bs_w_2_s	= _pci_mem_bs_w_2,
+	.bs_w_4_s	= _pci_mem_bs_w_4,
+
+	.bs_w_1	=	 ixp425_pci_mem_bs_w_1,
+	.bs_w_2	= 	ixp425_pci_mem_bs_w_2,
+	.bs_w_4	= 	ixp425_pci_mem_bs_w_4,
+#else
+	/* read (single) */
+	.bs_r_1		= ixp425_pci_mem_bs_r_1,
+	.bs_r_2		= ixp425_pci_mem_bs_r_2,
+	.bs_r_4		= ixp425_pci_mem_bs_r_4,
+	.bs_r_1_s	= ixp425_pci_mem_bs_r_1,
+	.bs_r_2_s	= ixp425_pci_mem_bs_r_2,
+	.bs_r_4_s	= ixp425_pci_mem_bs_r_4,
+
+	/* write (single) */
+	.bs_w_1		= ixp425_pci_mem_bs_w_1,
+	.bs_w_2		= ixp425_pci_mem_bs_w_2,
+	.bs_w_4		= ixp425_pci_mem_bs_w_4,
+	.bs_w_1_s	= ixp425_pci_mem_bs_w_1,
+	.bs_w_2_s	= ixp425_pci_mem_bs_w_2,
+	.bs_w_4_s	= ixp425_pci_mem_bs_w_4,
+#endif
+};
+
+void
+ixp425_mem_bs_init(bus_space_tag_t bs, void *cookie)
+{
+	*bs = ixp425_pci_mem_bs_tag_template;
+	bs->bs_cookie = cookie;
+}
+
+/* common routine */
+int
+ixp425_pci_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset,
+	bus_size_t size, bus_space_handle_t *nbshp)
+{
+	*nbshp = bsh + offset;
+	return (0);
+}
+
+void
+ixp425_pci_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset,
+    bus_size_t len, int flags)
+{
+	/* NULL */
+}	
+
+/* io bs */
+int
+ixp425_pci_io_bs_map(void *t, bus_addr_t bpa, bus_size_t size,
+	int cacheable, bus_space_handle_t *bshp)
+{
+	*bshp = bpa;
+	return (0);
+}
+
+void
+ixp425_pci_io_bs_unmap(void *t, bus_space_handle_t h, bus_size_t size)
+{
+	/* Nothing to do. */
+}
+
+int
+ixp425_pci_io_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend,
+	bus_size_t size, bus_size_t alignment, bus_size_t boundary, int cacheable,
+	bus_addr_t *bpap, bus_space_handle_t *bshp)
+{
+	panic("ixp425_pci_io_bs_alloc(): not implemented\n");
+}
+
+void
+ixp425_pci_io_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
+{
+	panic("ixp425_pci_io_bs_free(): not implemented\n");
+}
+
+/* special I/O functions */
+static __inline u_int32_t
+_bs_r(void *v, bus_space_handle_t ioh, bus_size_t off, u_int32_t be)
+{
+	u_int32_t data;
+
+	CSR_WRITE_4(PCI_NP_AD, (ioh + off) & ~3);
+	CSR_WRITE_4(PCI_NP_CBE, be | COMMAND_NP_IO_READ);
+	data = CSR_READ_4(PCI_NP_RDATA);
+	if (CSR_READ_4(PCI_ISR) & ISR_PFE)
+		CSR_WRITE_4(PCI_ISR, ISR_PFE);
+
+	return data;
+}
+
+static u_int8_t
+_pci_io_bs_r_1(void *v, bus_space_handle_t ioh, bus_size_t off)
+{
+	u_int32_t data, n, be;
+
+	n = (ioh + off) % 4;
+	be = (0xf & ~(1U << n)) << NP_CBE_SHIFT;
+	data = _bs_r(v, ioh, off, be);
+
+	return data >> (8 * n);
+}
+
+static u_int16_t
+_pci_io_bs_r_2(void *v, bus_space_handle_t ioh, bus_size_t off)
+{
+	u_int32_t data, n, be;
+
+	n = (ioh + off) % 4;
+	be = (0xf & ~((1U << n) | (1U << (n + 1)))) << NP_CBE_SHIFT;
+	data = _bs_r(v, ioh, off, be);
+
+	return data >> (8 * n);
+}
+
+static u_int32_t
+_pci_io_bs_r_4(void *v, bus_space_handle_t ioh, bus_size_t off)
+{
+	u_int32_t data;
+
+	data = _bs_r(v, ioh, off, 0);
+	return data;
+}
+
+#ifdef __ARMEB__
+static u_int8_t
+_pci_io_bs_r_1_s(void *v, bus_space_handle_t ioh, bus_size_t off)
+{
+	u_int32_t data, n, be;
+
+	n = (ioh + off) % 4;
+	be = (0xf & ~(1U << n)) << NP_CBE_SHIFT;
+	data = _bs_r(v, ioh, off, be);
+
+	return data >> (8 * n);
+}
+
+static u_int16_t
+_pci_io_bs_r_2_s(void *v, bus_space_handle_t ioh, bus_size_t off)
+{
+	u_int32_t data, n, be;
+
+	n = (ioh + off) % 4;
+	be = (0xf & ~((1U << n) | (1U << (n + 1)))) << NP_CBE_SHIFT;
+	data = _bs_r(v, ioh, off, be);
+
+	return data >> (8 * n);
+}
+
+static u_int32_t
+_pci_io_bs_r_4_s(void *v, bus_space_handle_t ioh, bus_size_t off)
+{
+	u_int32_t data;
+
+	data = _bs_r(v, ioh, off, 0);
+	return le32toh(data);
+}
+#endif /* __ARMEB__ */
+
+static __inline void
+_bs_w(void *v, bus_space_handle_t ioh, bus_size_t off,
+	u_int32_t be, u_int32_t data)
+{
+	CSR_WRITE_4(PCI_NP_AD, (ioh + off) & ~3);
+	CSR_WRITE_4(PCI_NP_CBE, be | COMMAND_NP_IO_WRITE);
+	CSR_WRITE_4(PCI_NP_WDATA, data);
+	if (CSR_READ_4(PCI_ISR) & ISR_PFE)
+		CSR_WRITE_4(PCI_ISR, ISR_PFE);
+}
+
+static void
+_pci_io_bs_w_1(void *v, bus_space_handle_t ioh, bus_size_t off,
+	u_int8_t val)
+{
+	u_int32_t data, n, be;
+
+	n = (ioh + off) % 4;
+	be = (0xf & ~(1U << n)) << NP_CBE_SHIFT;
+	data = val << (8 * n);
+	_bs_w(v, ioh, off, be, data);
+}
+
+static void
+_pci_io_bs_w_2(void *v, bus_space_handle_t ioh, bus_size_t off,
+	u_int16_t val)
+{
+	u_int32_t data, n, be;
+
+	n = (ioh + off) % 4;
+	be = (0xf & ~((1U << n) | (1U << (n + 1)))) << NP_CBE_SHIFT;
+	data = val << (8 * n);
+	_bs_w(v, ioh, off, be, data);
+}
+
+static void
+_pci_io_bs_w_4(void *v, bus_space_handle_t ioh, bus_size_t off,
+	u_int32_t val)
+{
+	_bs_w(v, ioh, off, 0, val);
+}
+
+#ifdef __ARMEB__
+static void
+_pci_io_bs_w_1_s(void *v, bus_space_handle_t ioh, bus_size_t off,
+	u_int8_t val)
+{
+	u_int32_t data, n, be;
+
+	n = (ioh + off) % 4;
+	be = (0xf & ~(1U << n)) << NP_CBE_SHIFT;
+	data = val << (8 * n);
+	_bs_w(v, ioh, off, be, data);
+}
+
+static void
+_pci_io_bs_w_2_s(void *v, bus_space_handle_t ioh, bus_size_t off,
+	u_int16_t val)
+{
+	u_int32_t data, n, be;
+
+	n = (ioh + off) % 4;
+	be = (0xf & ~((1U << n) | (1U << (n + 1)))) << NP_CBE_SHIFT;
+	data = val << (8 * n);
+	_bs_w(v, ioh, off, be, data);
+}
+
+static void
+_pci_io_bs_w_4_s(void *v, bus_space_handle_t ioh, bus_size_t off,
+	u_int32_t val)
+{
+	_bs_w(v, ioh, off, 0, htole32(val));
+}
+#endif /* __ARMEB__ */
+
+/* mem bs */
+int
+ixp425_pci_mem_bs_map(void *t, bus_addr_t bpa, bus_size_t size,
+	      int cacheable, bus_space_handle_t *bshp)
+{
+	vm_paddr_t pa, endpa;
+
+	pa = trunc_page(bpa);
+	endpa = round_page(bpa + size);
+
+	*bshp = (vm_offset_t)pmap_mapdev(pa, endpa - pa);
+
+	return (0);
+}
+
+void
+ixp425_pci_mem_bs_unmap(void *t, bus_space_handle_t h, bus_size_t size)
+{
+	vm_offset_t va, endva;
+
+	va = trunc_page((vm_offset_t)t);
+	endva = va + round_page(size);
+
+	/* Free the kernel virtual mapping. */
+	kmem_free(kernel_map, va, endva - va);
+}
+
+int
+ixp425_pci_mem_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend,
+	bus_size_t size, bus_size_t alignment, bus_size_t boundary, int cacheable,
+	bus_addr_t *bpap, bus_space_handle_t *bshp)
+{
+	panic("ixp425_mem_bs_alloc(): not implemented\n");
+}
+
+void    
+ixp425_pci_mem_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
+{
+	panic("ixp425_mem_bs_free(): not implemented\n");
+}
+
+#ifdef __ARMEB__
+static u_int8_t
+_pci_mem_bs_r_1(void *v, bus_space_handle_t ioh, bus_size_t off)
+{
+	return ixp425_pci_mem_bs_r_1(v, ioh, off);
+}
+
+static u_int16_t
+_pci_mem_bs_r_2(void *v, bus_space_handle_t ioh, bus_size_t off)
+{
+	return (ixp425_pci_mem_bs_r_2(v, ioh, off));
+}
+
+static u_int32_t
+_pci_mem_bs_r_4(void *v, bus_space_handle_t ioh, bus_size_t off)
+{
+	u_int32_t data;
+
+	data = ixp425_pci_mem_bs_r_4(v, ioh, off);
+	return (le32toh(data));
+}
+
+static void
+_pci_mem_bs_w_1(void *v, bus_space_handle_t ioh, bus_size_t off,
+	u_int8_t val)
+{
+	ixp425_pci_mem_bs_w_1(v, ioh, off, val);
+}
+
+static void
+_pci_mem_bs_w_2(void *v, bus_space_handle_t ioh, bus_size_t off,
+	u_int16_t val)
+{
+	ixp425_pci_mem_bs_w_2(v, ioh, off, val);
+}
+
+static void
+_pci_mem_bs_w_4(void *v, bus_space_handle_t ioh, bus_size_t off,
+	u_int32_t val)
+{
+	ixp425_pci_mem_bs_w_4(v, ioh, off, htole32(val));
+}
+#endif /* __ARMEB__ */
+
+/* End of ixp425_pci_space.c */
diff --git a/sys/arm/xscale/ixp425/ixp425_qmgr.c b/sys/arm/xscale/ixp425/ixp425_qmgr.c
new file mode 100644
index 000000000000..fcf2da257fad
--- /dev/null
+++ b/sys/arm/xscale/ixp425/ixp425_qmgr.c
@@ -0,0 +1,1077 @@
+/*-
+ * Copyright (c) 2006 Sam Leffler, Errno Consulting
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
+ *    redistribution must be conditioned upon including a substantially
+ *    similar Disclaimer requirement for further binary redistribution.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
+ * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+ * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGES.
+ */
+
+/*-
+ * Copyright (c) 2001-2005, Intel Corporation.
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Intel Corporation nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+*/
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+/*
+ * Intel XScale Queue Manager support.
+ *
+ * Each IXP4XXX device has a hardware block that implements a priority
+ * queue manager that is shared between the XScale cpu and the backend
+ * devices (such as the NPE).  Queues are accessed by reading/writing
+ * special memory locations.  The queue contents are mapped into a shared
+ * SRAM region with entries managed in a circular buffer.  The XScale
+ * processor can receive interrupts based on queue contents (a condition
+ * code determines when interrupts should be delivered).
+ *
+ * The code here basically replaces the qmgr class in the Intel Access
+ * Library (IAL).
+ */
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/time.h>
+#include <sys/bus.h>
+#include <sys/resource.h>
+#include <sys/rman.h>
+#include <sys/sysctl.h>
+
+#include <machine/bus.h>
+#include <machine/cpu.h>
+#include <machine/cpufunc.h>
+#include <machine/resource.h>
+#include <machine/intr.h>
+#include <arm/xscale/ixp425/ixp425reg.h>
+#include <arm/xscale/ixp425/ixp425var.h>
+
+#include <arm/xscale/ixp425/ixp425_qmgr.h>
+
+/*
+ * State per AQM hw queue.
+ * This structure holds q configuration and dispatch state.
+ */
+struct qmgrInfo {
+	int		qSizeInWords;		/* queue size in words */
+
+	uint32_t	qOflowStatBitMask;	/* overflow status mask */
+	int		qWriteCount;		/* queue write count */
+
+	bus_size_t	qAccRegAddr;		/* access register */
+	bus_size_t	qUOStatRegAddr;		/* status register */
+	bus_size_t	qConfigRegAddr;		/* config register */
+	int		qSizeInEntries;		/* queue size in entries */
+
+	uint32_t	qUflowStatBitMask;	/* underflow status mask */
+	int		qReadCount;		/* queue read count */
+
+	/* XXX union */
+	uint32_t	qStatRegAddr;
+	uint32_t	qStatBitsOffset;
+	uint32_t	qStat0BitMask;
+	uint32_t	qStat1BitMask;
+
+	uint32_t	intRegCheckMask;	/* interrupt reg check mask */
+	void		(*cb)(int, void *);	/* callback function */
+	void		*cbarg;			/* callback argument */
+	int 		priority;		/* dispatch priority */
+#if 0
+	/* NB: needed only for A0 parts */
+	u_int		statusWordOffset;	/* status word offset */
+	uint32_t	statusMask;             /* status mask */    
+	uint32_t	statusCheckValue;	/* status check value */
+#endif
+};
+
+struct ixpqmgr_softc {
+	device_t		sc_dev;
+	bus_space_tag_t		sc_iot;
+	bus_space_handle_t	sc_ioh;
+	struct resource		*sc_irq;	/* IRQ resource */
+	void			*sc_ih;		/* interrupt handler */
+	int			sc_rid;		/* resource id for irq */
+
+	struct qmgrInfo		qinfo[IX_QMGR_MAX_NUM_QUEUES];
+	/*
+	 * This array contains a list of queue identifiers ordered by
+	 * priority. The table is split logically between queue
+	 * identifiers 0-31 and 32-63.  To optimize lookups bit masks
+	 * are kept for the first-32 and last-32 q's.  When the
+	 * table needs to be rebuilt mark rebuildTable and it'll
+	 * happen after the next interrupt.
+	 */
+	int			priorityTable[IX_QMGR_MAX_NUM_QUEUES];
+	uint32_t		lowPriorityTableFirstHalfMask;
+	uint32_t		uppPriorityTableFirstHalfMask;
+	int			rebuildTable;	/* rebuild priorityTable */
+
+	uint32_t		aqmFreeSramAddress;	/* SRAM free space */
+};
+
+static int qmgr_debug = 0;
+SYSCTL_INT(_debug, OID_AUTO, qmgr, CTLFLAG_RW, &qmgr_debug,
+	   0, "IXP425 Q-Manager debug msgs");
+TUNABLE_INT("debug.qmgr", &qmgr_debug);
+#define	DPRINTF(dev, fmt, ...) do {					\
+	if (qmgr_debug) printf(fmt, __VA_ARGS__);			\
+} while (0)
+#define	DPRINTFn(n, dev, fmt, ...) do {					\
+	if (qmgr_debug >= n) printf(fmt, __VA_ARGS__);			\
+} while (0)
+
+static struct ixpqmgr_softc *ixpqmgr_sc = NULL;
+
+static void ixpqmgr_rebuild(struct ixpqmgr_softc *);
+static void ixpqmgr_intr(void *);
+
+static void aqm_int_enable(struct ixpqmgr_softc *sc, int qId);
+static void aqm_int_disable(struct ixpqmgr_softc *sc, int qId);
+static void aqm_qcfg(struct ixpqmgr_softc *sc, int qId, u_int ne, u_int nf);
+static void aqm_srcsel_write(struct ixpqmgr_softc *sc, int qId, int sourceId);
+static void aqm_reset(struct ixpqmgr_softc *sc);
+
+static void
+dummyCallback(int qId, void *arg)
+{
+	/* XXX complain */
+}
+
+static uint32_t
+aqm_reg_read(struct ixpqmgr_softc *sc, bus_size_t off)
+{
+	DPRINTFn(9, sc->sc_dev, "%s(0x%x)\n", __func__, (int)off);
+	return bus_space_read_4(sc->sc_iot, sc->sc_ioh, off);
+}
+
+static void
+aqm_reg_write(struct ixpqmgr_softc *sc, bus_size_t off, uint32_t val)
+{
+	DPRINTFn(9, sc->sc_dev, "%s(0x%x, 0x%x)\n", __func__, (int)off, val);
+	bus_space_write_4(sc->sc_iot, sc->sc_ioh, off, val);
+}
+
+static int
+ixpqmgr_probe(device_t dev)
+{
+	device_set_desc(dev, "IXP425 Q-Manager");
+	return 0;
+}
+
+static void
+ixpqmgr_attach(device_t dev)
+{
+	struct ixpqmgr_softc *sc = device_get_softc(dev);
+	struct ixp425_softc *sa = device_get_softc(device_get_parent(dev));
+	int i;
+
+	ixpqmgr_sc = sc;
+
+	sc->sc_dev = dev;
+	sc->sc_iot = sa->sc_iot;
+	if (bus_space_map(sc->sc_iot, IXP425_QMGR_HWBASE, IXP425_QMGR_SIZE,
+	    0, &sc->sc_ioh))
+		panic("%s: Cannot map registers", device_get_name(dev));
+
+	/* NB: we only use the lower 32 q's */
+	sc->sc_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &sc->sc_rid,
+	    IXP425_INT_QUE1_32, IXP425_INT_QUE33_64, 2, RF_ACTIVE);
+	if (!sc->sc_irq)
+		panic("Unable to allocate the qmgr irqs.\n");
+	/* XXX could be a source of entropy */
+	bus_setup_intr(dev, sc->sc_irq, INTR_TYPE_NET | INTR_MPSAFE,
+		ixpqmgr_intr, NULL, &sc->sc_ih);
+
+	/* NB: softc is pre-zero'd */
+	for (i = 0; i < IX_QMGR_MAX_NUM_QUEUES; i++) {
+	    struct qmgrInfo *qi = &sc->qinfo[i];
+
+	    qi->cb = dummyCallback;
+	    qi->priority = IX_QMGR_Q_PRIORITY_0;	/* default priority */
+	    /* 
+	     * There are two interrupt registers, 32 bits each. One
+	     * for the lower queues(0-31) and one for the upper
+	     * queues(32-63). Therefore need to mod by 32 i.e the
+	     * min upper queue identifier.
+	     */
+	    qi->intRegCheckMask = (1<<(i%(IX_QMGR_MIN_QUEUPP_QID)));
+
+	    /*
+	     * Register addresses and bit masks are calculated and
+	     * stored here to optimize QRead, QWrite and QStatusGet
+	     * functions.
+	     */
+
+	    /* AQM Queue access reg addresses, per queue */
+	    qi->qAccRegAddr = IX_QMGR_Q_ACCESS_ADDR_GET(i);
+	    qi->qAccRegAddr = IX_QMGR_Q_ACCESS_ADDR_GET(i);
+	    qi->qConfigRegAddr = IX_QMGR_Q_CONFIG_ADDR_GET(i);
+
+	    /* AQM Queue lower-group (0-31), only */
+	    if (i < IX_QMGR_MIN_QUEUPP_QID) {
+		/* AQM Q underflow/overflow status reg address, per queue */
+		qi->qUOStatRegAddr = IX_QMGR_QUEUOSTAT0_OFFSET +
+		    ((i / IX_QMGR_QUEUOSTAT_NUM_QUE_PER_WORD) * 
+		     sizeof(uint32_t));
+
+		/* AQM Q underflow status bit masks for status reg per queue */
+		qi->qUflowStatBitMask = 
+		    (IX_QMGR_UNDERFLOW_BIT_OFFSET + 1) <<
+		    ((i & (IX_QMGR_QUEUOSTAT_NUM_QUE_PER_WORD - 1)) *
+		     (32 / IX_QMGR_QUEUOSTAT_NUM_QUE_PER_WORD));
+
+		/* AQM Q overflow status bit masks for status reg, per queue */
+		qi->qOflowStatBitMask = 
+		    (IX_QMGR_OVERFLOW_BIT_OFFSET + 1) <<
+		    ((i & (IX_QMGR_QUEUOSTAT_NUM_QUE_PER_WORD - 1)) *
+		     (32 / IX_QMGR_QUEUOSTAT_NUM_QUE_PER_WORD));
+
+		/* AQM Q lower-group (0-31) status reg addresses, per queue */
+		qi->qStatRegAddr = IX_QMGR_QUELOWSTAT0_OFFSET +
+		    ((i / IX_QMGR_QUELOWSTAT_NUM_QUE_PER_WORD) *
+		     sizeof(uint32_t));
+
+		/* AQM Q lower-group (0-31) status register bit offset */
+		qi->qStatBitsOffset =
+		    (i & (IX_QMGR_QUELOWSTAT_NUM_QUE_PER_WORD - 1)) * 
+		    (32 / IX_QMGR_QUELOWSTAT_NUM_QUE_PER_WORD);
+	    } else { /* AQM Q upper-group (32-63), only */
+		qi->qUOStatRegAddr = 0;		/* XXX */
+
+		/* AQM Q upper-group (32-63) Nearly Empty status reg bitmasks */
+		qi->qStat0BitMask = (1 << (i - IX_QMGR_MIN_QUEUPP_QID));
+
+		/* AQM Q upper-group (32-63) Full status register bitmasks */
+		qi->qStat1BitMask = (1 << (i - IX_QMGR_MIN_QUEUPP_QID));
+	    }
+	}
+	
+	sc->aqmFreeSramAddress = 0x100;	/* Q buffer space starts at 0x2100 */
+
+	ixpqmgr_rebuild(sc);		/* build inital priority table */
+	aqm_reset(sc);			/* reset h/w */
+}
+
+static void
+ixpqmgr_detach(device_t dev)
+{
+	struct ixpqmgr_softc *sc = device_get_softc(dev);
+
+	aqm_reset(sc);		/* disable interrupts */
+	bus_teardown_intr(dev, sc->sc_irq, sc->sc_ih);
+	bus_release_resource(dev, SYS_RES_IRQ, sc->sc_rid, sc->sc_irq);
+	bus_space_unmap(sc->sc_iot, sc->sc_ioh, IXP425_QMGR_SIZE);
+}
+
+int
+ixpqmgr_qconfig(int qId, int qEntries, int ne, int nf, int srcSel,
+    void (*cb)(int, void *), void *cbarg)
+{
+	struct ixpqmgr_softc *sc = ixpqmgr_sc;
+	struct qmgrInfo *qi = &sc->qinfo[qId];
+
+	DPRINTF(sc->sc_dev, "%s(%u, %u, %u, %u, %u, %p, %p)\n",
+	    __func__, qId, qEntries, ne, nf, srcSel, cb, cbarg);
+
+	/* NB: entry size is always 1 */
+	qi->qSizeInWords = qEntries;
+
+	qi->qReadCount = 0;
+	qi->qWriteCount = 0;
+	qi->qSizeInEntries = qEntries;	/* XXX kept for code clarity */
+
+	if (cb == NULL) {
+	    /* Reset to dummy callback */
+	    qi->cb = dummyCallback;
+	    qi->cbarg = 0;
+	} else {
+	    qi->cb = cb;
+	    qi->cbarg = cbarg;
+	}
+
+	/* Write the config register; NB must be AFTER qinfo setup */
+	aqm_qcfg(sc, qId, ne, nf);
+	/*
+	 * Account for space just allocated to queue.
+	 */
+	sc->aqmFreeSramAddress += (qi->qSizeInWords * sizeof(uint32_t));
+
+	/* Set the interupt source if this queue is in the range 0-31 */
+	if (qId < IX_QMGR_MIN_QUEUPP_QID)
+	    aqm_srcsel_write(sc, qId, srcSel);
+
+	if (cb != NULL)				/* Enable the interrupt */
+	    aqm_int_enable(sc, qId);
+
+	sc->rebuildTable = TRUE;
+
+	return 0;		/* XXX */
+}
+
+int
+ixpqmgr_qwrite(int qId, uint32_t entry)
+{
+	struct ixpqmgr_softc *sc = ixpqmgr_sc;
+	struct qmgrInfo *qi = &sc->qinfo[qId];
+
+	DPRINTFn(3, sc->sc_dev, "%s(%u, 0x%x) writeCount %u size %u\n",
+	    __func__, qId, entry, qi->qWriteCount, qi->qSizeInEntries);
+
+	/* write the entry */
+	aqm_reg_write(sc, qi->qAccRegAddr, entry);
+
+	/* NB: overflow is available for lower queues only */
+	if (qId < IX_QMGR_MIN_QUEUPP_QID) {
+	    int qSize = qi->qSizeInEntries;
+	    /*
+	     * Increment the current number of entries in the queue
+	     * and check for overflow .
+	     */
+	    if (qi->qWriteCount++ == qSize) {	/* check for overflow */
+		uint32_t status = aqm_reg_read(sc, qi->qUOStatRegAddr);
+		int qPtrs;
+
+		/*
+		 * Read the status twice because the status may 
+		 * not be immediately ready after the write operation
+		 */
+		if ((status & qi->qOflowStatBitMask) ||
+		    ((status = aqm_reg_read(sc, qi->qUOStatRegAddr)) & qi->qOflowStatBitMask)) {
+		    /*
+		     * The queue is full, clear the overflow status bit if set.
+		     */
+		    aqm_reg_write(sc, qi->qUOStatRegAddr,
+			status & ~qi->qOflowStatBitMask);
+		    qi->qWriteCount = qSize;
+		    DPRINTFn(5, sc->sc_dev,
+			"%s(%u, 0x%x) Q full, overflow status cleared\n",
+			__func__, qId, entry);
+		    return ENOSPC;
+		}
+		/*
+		 * No overflow occured : someone is draining the queue
+		 * and the current counter needs to be
+		 * updated from the current number of entries in the queue
+		 */
+
+		/* calculate number of words in q */
+		qPtrs = aqm_reg_read(sc, qi->qConfigRegAddr);
+		DPRINTFn(2, sc->sc_dev,
+		    "%s(%u, 0x%x) Q full, no overflow status, qConfig 0x%x\n",
+		    __func__, qId, entry, qPtrs);
+		qPtrs = (qPtrs - (qPtrs >> 7)) & 0x7f; 
+
+		if (qPtrs == 0) {
+		    /*
+		     * The queue may be full at the time of the 
+		     * snapshot. Next access will check 
+		     * the overflow status again.
+		     */
+		    qi->qWriteCount = qSize;
+		} else {
+		    /* convert the number of words to a number of entries */
+		    qi->qWriteCount = qPtrs & (qSize - 1);
+		}
+	    }
+	}
+	return 0;
+}
+
+int
+ixpqmgr_qread(int qId, uint32_t *entry)
+{
+	struct ixpqmgr_softc *sc = ixpqmgr_sc;
+	struct qmgrInfo *qi = &sc->qinfo[qId];
+	bus_size_t off = qi->qAccRegAddr;
+
+	*entry = aqm_reg_read(sc, off);
+
+	/*
+	 * Reset the current read count : next access to the read function 
+	 * will force a underflow status check.
+	 */
+	qi->qReadCount = 0;
+
+	/* Check if underflow occurred on the read */
+	if (*entry == 0 && qId < IX_QMGR_MIN_QUEUPP_QID) {
+	    /* get the queue status */
+	    uint32_t status = aqm_reg_read(sc, qi->qUOStatRegAddr);
+
+	    if (status & qi->qUflowStatBitMask) { /* clear underflow status */
+		aqm_reg_write(sc, qi->qUOStatRegAddr,
+		    status &~ qi->qUflowStatBitMask);
+		return ENOSPC;
+	    }
+	}
+	return 0;
+}
+
+int
+ixpqmgr_qreadm(int qId, uint32_t n, uint32_t *p)
+{
+	struct ixpqmgr_softc *sc = ixpqmgr_sc;
+	struct qmgrInfo *qi = &sc->qinfo[qId];
+	uint32_t entry;
+	bus_size_t off = qi->qAccRegAddr;
+
+	entry = aqm_reg_read(sc, off);
+	while (--n) {
+	    if (entry == 0) {
+		/* if we read a NULL entry, stop. We have underflowed */
+		break;
+	    }
+	    *p++ = entry;	/* store */
+	    entry = aqm_reg_read(sc, off);
+	}
+	*p = entry;
+
+	/*
+	 * Reset the current read count : next access to the read function 
+	 * will force a underflow status check.
+	 */
+	qi->qReadCount = 0;
+
+	/* Check if underflow occurred on the read */
+	if (entry == 0 && qId < IX_QMGR_MIN_QUEUPP_QID) {
+	    /* get the queue status */
+	    uint32_t status = aqm_reg_read(sc, qi->qUOStatRegAddr);
+
+	    if (status & qi->qUflowStatBitMask) { /* clear underflow status */
+		aqm_reg_write(sc, qi->qUOStatRegAddr,
+		    status &~ qi->qUflowStatBitMask);
+		return ENOSPC;
+	    }
+	}
+	return 0;
+}
+
+uint32_t
+ixpqmgr_getqstatus(int qId)
+{
+#define	QLOWSTATMASK \
+    ((1 << (32 / IX_QMGR_QUELOWSTAT_NUM_QUE_PER_WORD)) - 1)
+	struct ixpqmgr_softc *sc = ixpqmgr_sc;
+	const struct qmgrInfo *qi = &sc->qinfo[qId];
+	uint32_t status;
+
+	if (qId < IX_QMGR_MIN_QUEUPP_QID) {
+	    /* read the status of a queue in the range 0-31 */
+	    status = aqm_reg_read(sc, qi->qStatRegAddr);
+
+	    /* mask out the status bits relevant only to this queue */
+	    status = (status >> qi->qStatBitsOffset) & QLOWSTATMASK;
+	} else { /* read status of a queue in the range 32-63 */
+	    status = 0;
+	    if (aqm_reg_read(sc, IX_QMGR_QUEUPPSTAT0_OFFSET)&qi->qStat0BitMask)
+		status |= IX_QMGR_Q_STATUS_NE_BIT_MASK;	/* nearly empty */
+	    if (aqm_reg_read(sc, IX_QMGR_QUEUPPSTAT1_OFFSET)&qi->qStat1BitMask)
+		status |= IX_QMGR_Q_STATUS_F_BIT_MASK;	/* full */
+	}
+	return status;
+#undef QLOWSTATMASK
+}
+
+uint32_t
+ixpqmgr_getqconfig(int qId)
+{
+	struct ixpqmgr_softc *sc = ixpqmgr_sc;
+
+	return aqm_reg_read(sc, IX_QMGR_Q_CONFIG_ADDR_GET(qId));
+}
+
+void
+ixpqmgr_dump(void)
+{
+	struct ixpqmgr_softc *sc = ixpqmgr_sc;
+	int i, a;
+
+	/* status registers */
+	printf("0x%04x: %08x %08x %08x %08x\n"
+		, 0x400
+		, aqm_reg_read(sc, 0x400)
+		, aqm_reg_read(sc, 0x400+4)
+		, aqm_reg_read(sc, 0x400+8)
+		, aqm_reg_read(sc, 0x400+12)
+	);
+	printf("0x%04x: %08x %08x %08x %08x\n"
+		, 0x410
+		, aqm_reg_read(sc, 0x410)
+		, aqm_reg_read(sc, 0x410+4)
+		, aqm_reg_read(sc, 0x410+8)
+		, aqm_reg_read(sc, 0x410+12)
+	);
+	printf("0x%04x: %08x %08x %08x %08x\n"
+		, 0x420
+		, aqm_reg_read(sc, 0x420)
+		, aqm_reg_read(sc, 0x420+4)
+		, aqm_reg_read(sc, 0x420+8)
+		, aqm_reg_read(sc, 0x420+12)
+	);
+	printf("0x%04x: %08x %08x %08x %08x\n"
+		, 0x430
+		, aqm_reg_read(sc, 0x430)
+		, aqm_reg_read(sc, 0x430+4)
+		, aqm_reg_read(sc, 0x430+8)
+		, aqm_reg_read(sc, 0x430+12)
+	);
+	/* q configuration registers */
+	for (a = 0x2000; a < 0x20ff; a += 32)
+		printf("0x%04x: %08x %08x %08x %08x %08x %08x %08x %08x\n"
+			, a
+			, aqm_reg_read(sc, a)
+			, aqm_reg_read(sc, a+4)
+			, aqm_reg_read(sc, a+8)
+			, aqm_reg_read(sc, a+12)
+			, aqm_reg_read(sc, a+16)
+			, aqm_reg_read(sc, a+20)
+			, aqm_reg_read(sc, a+24)
+			, aqm_reg_read(sc, a+28)
+		);
+	/* allocated SRAM */
+	for (i = 0x100; i < sc->aqmFreeSramAddress; i += 32) {
+		a = 0x2000 + i;
+		printf("0x%04x: %08x %08x %08x %08x %08x %08x %08x %08x\n"
+			, a
+			, aqm_reg_read(sc, a)
+			, aqm_reg_read(sc, a+4)
+			, aqm_reg_read(sc, a+8)
+			, aqm_reg_read(sc, a+12)
+			, aqm_reg_read(sc, a+16)
+			, aqm_reg_read(sc, a+20)
+			, aqm_reg_read(sc, a+24)
+			, aqm_reg_read(sc, a+28)
+		);
+	}
+	for (i = 0; i < 16; i++) {
+		printf("Q[%2d] config 0x%08x status 0x%02x  "
+		       "Q[%2d] config 0x%08x status 0x%02x\n"
+		    , i, ixpqmgr_getqconfig(i), ixpqmgr_getqstatus(i)
+		    , i+16, ixpqmgr_getqconfig(i+16), ixpqmgr_getqstatus(i+16)
+		);
+	}
+}
+
+void
+ixpqmgr_notify_enable(int qId, int srcSel)
+{
+	struct ixpqmgr_softc *sc = ixpqmgr_sc;
+#if 0
+	/* Calculate the checkMask and checkValue for this q */
+	aqm_calc_statuscheck(sc, qId, srcSel);
+#endif
+	/* Set the interupt source if this queue is in the range 0-31 */
+	if (qId < IX_QMGR_MIN_QUEUPP_QID)
+	    aqm_srcsel_write(sc, qId, srcSel);
+
+	/* Enable the interrupt */
+	aqm_int_enable(sc, qId);
+}
+
+void
+ixpqmgr_notify_disable(int qId)
+{
+	struct ixpqmgr_softc *sc = ixpqmgr_sc;
+
+	aqm_int_disable(sc, qId);
+}
+
+/*
+ * Rebuild the priority table used by the dispatcher.
+ */
+static void
+ixpqmgr_rebuild(struct ixpqmgr_softc *sc)
+{
+	int q, pri;
+	int lowQuePriorityTableIndex, uppQuePriorityTableIndex;
+	struct qmgrInfo *qi;
+
+	sc->lowPriorityTableFirstHalfMask = 0;
+	sc->uppPriorityTableFirstHalfMask = 0;
+	
+	lowQuePriorityTableIndex = 0;
+	uppQuePriorityTableIndex = 32;
+	for (pri = 0; pri < IX_QMGR_NUM_PRIORITY_LEVELS; pri++) {
+	    /* low priority q's */
+	    for (q = 0; q < IX_QMGR_MIN_QUEUPP_QID; q++) {
+		qi = &sc->qinfo[q];
+		if (qi->priority == pri) { 
+		    /*
+		     * Build the priority table bitmask which match the
+		     * queues of the first half of the priority table.
+		     */
+		    if (lowQuePriorityTableIndex < 16) {
+			sc->lowPriorityTableFirstHalfMask |=
+			    qi->intRegCheckMask;
+		    }
+		    sc->priorityTable[lowQuePriorityTableIndex++] = q;
+		}
+	    }
+	    /* high priority q's */
+	    for (; q < IX_QMGR_MAX_NUM_QUEUES; q++) {
+		qi = &sc->qinfo[q];
+		if (qi->priority == pri) {
+		    /*
+		     * Build the priority table bitmask which match the
+		     * queues of the first half of the priority table .
+		     */
+		    if (uppQuePriorityTableIndex < 48) {
+			sc->uppPriorityTableFirstHalfMask |=
+			    qi->intRegCheckMask;
+		    }
+		    sc->priorityTable[uppQuePriorityTableIndex++] = q;
+		}
+	    }
+	}
+	sc->rebuildTable = FALSE;
+}
+
+/*
+ * Count the number of leading zero bits in a word,
+ * and return the same value than the CLZ instruction.
+ * Note this is similar to the standard ffs function but
+ * it counts zero's from the MSB instead of the LSB.
+ *
+ * word (in)    return value (out)
+ * 0x80000000   0
+ * 0x40000000   1
+ * ,,,          ,,,
+ * 0x00000002   30
+ * 0x00000001   31
+ * 0x00000000   32
+ *
+ * The C version of this function is used as a replacement 
+ * for system not providing the equivalent of the CLZ 
+ * assembly language instruction.
+ *
+ * Note that this version is big-endian
+ */
+static unsigned int
+_lzcount(uint32_t word)
+{
+	unsigned int lzcount = 0;
+
+	if (word == 0)
+	    return 32;
+	while ((word & 0x80000000) == 0) {
+	    word <<= 1;
+	    lzcount++;
+	}
+	return lzcount;
+}
+
+static void
+ixpqmgr_intr(void *arg)
+{
+	struct ixpqmgr_softc *sc = ixpqmgr_sc;
+	uint32_t intRegVal;                /* Interrupt reg val */
+	struct qmgrInfo *qi;
+	int priorityTableIndex;		/* Priority table index */
+	int qIndex;			/* Current queue being processed */
+
+	/* Read the interrupt register */
+	intRegVal = aqm_reg_read(sc, IX_QMGR_QINTREG0_OFFSET);
+	/* Write back to clear interrupt */
+	aqm_reg_write(sc, IX_QMGR_QINTREG0_OFFSET, intRegVal);
+
+	DPRINTFn(5, sc->sc_dev, "%s: ISR0 0x%x ISR1 0x%x\n",
+	    __func__, intRegVal, aqm_reg_read(sc, IX_QMGR_QINTREG1_OFFSET));
+
+	/* No queue has interrupt register set */
+	if (intRegVal != 0) {
+		/* get the first queue Id from the interrupt register value */
+		qIndex = (32 - 1) - _lzcount(intRegVal);
+
+		DPRINTFn(2, sc->sc_dev, "%s: ISR0 0x%x qIndex %u\n",
+		    __func__, intRegVal, qIndex);
+
+		/*
+		 * Optimize for single callback case.
+		 */
+		 qi = &sc->qinfo[qIndex];
+		 if (intRegVal == qi->intRegCheckMask) {
+		    /*
+		     * Only 1 queue event triggered a notification.
+		     * Call the callback function for this queue
+		     */
+		    qi->cb(qIndex, qi->cbarg);
+		 } else {
+		     /*
+		      * The event is triggered by more than 1 queue,
+		      * the queue search will start from the beginning
+		      * or the middle of the priority table.
+		      *
+		      * The search will end when all the bits of the interrupt
+		      * register are cleared. There is no need to maintain
+		      * a seperate value and test it at each iteration.
+		      */
+		     if (intRegVal & sc->lowPriorityTableFirstHalfMask) {
+			 priorityTableIndex = 0;
+		     } else {
+			 priorityTableIndex = 16;
+		     }
+		     /*
+		      * Iterate over the priority table until all the bits
+		      * of the interrupt register are cleared.
+		      */
+		     do {
+			 qIndex = sc->priorityTable[priorityTableIndex++];
+			 qi = &sc->qinfo[qIndex];
+
+			 /* If this queue caused this interrupt to be raised */
+			 if (intRegVal & qi->intRegCheckMask) {
+			     /* Call the callback function for this queue */
+			     qi->cb(qIndex, qi->cbarg);
+			     /* Clear the interrupt register bit */
+			     intRegVal &= ~qi->intRegCheckMask;
+			 }
+		      } while (intRegVal);
+		 }
+	 }
+
+	/* Rebuild the priority table if needed */
+	if (sc->rebuildTable)
+	    ixpqmgr_rebuild(sc);
+}
+
+#if 0
+/*
+ * Generate the parameters used to check if a Q's status matches
+ * the specified source select.  We calculate which status word
+ * to check (statusWordOffset), the value to check the status
+ * against (statusCheckValue) and the mask (statusMask) to mask
+ * out all but the bits to check in the status word.
+ */
+static void
+aqm_calc_statuscheck(int qId, IxQMgrSourceId srcSel)
+{
+	struct qmgrInfo *qi = &qinfo[qId];
+	uint32_t shiftVal;
+       
+	if (qId < IX_QMGR_MIN_QUEUPP_QID) {
+	    switch (srcSel) {
+	    case IX_QMGR_Q_SOURCE_ID_E:
+		qi->statusCheckValue = IX_QMGR_Q_STATUS_E_BIT_MASK;
+		qi->statusMask = IX_QMGR_Q_STATUS_E_BIT_MASK;
+		break;
+	    case IX_QMGR_Q_SOURCE_ID_NE:
+		qi->statusCheckValue = IX_QMGR_Q_STATUS_NE_BIT_MASK;
+		qi->statusMask = IX_QMGR_Q_STATUS_NE_BIT_MASK;
+		break;
+	    case IX_QMGR_Q_SOURCE_ID_NF:
+		qi->statusCheckValue = IX_QMGR_Q_STATUS_NF_BIT_MASK;
+		qi->statusMask = IX_QMGR_Q_STATUS_NF_BIT_MASK;
+		break;
+	    case IX_QMGR_Q_SOURCE_ID_F:
+		qi->statusCheckValue = IX_QMGR_Q_STATUS_F_BIT_MASK;
+		qi->statusMask = IX_QMGR_Q_STATUS_F_BIT_MASK;
+		break;
+	    case IX_QMGR_Q_SOURCE_ID_NOT_E:
+		qi->statusCheckValue = 0;
+		qi->statusMask = IX_QMGR_Q_STATUS_E_BIT_MASK;
+		break;
+	    case IX_QMGR_Q_SOURCE_ID_NOT_NE:
+		qi->statusCheckValue = 0;
+		qi->statusMask = IX_QMGR_Q_STATUS_NE_BIT_MASK;
+		break;
+	    case IX_QMGR_Q_SOURCE_ID_NOT_NF:
+		qi->statusCheckValue = 0;
+		qi->statusMask = IX_QMGR_Q_STATUS_NF_BIT_MASK;
+		break;
+	    case IX_QMGR_Q_SOURCE_ID_NOT_F:
+		qi->statusCheckValue = 0;
+		qi->statusMask = IX_QMGR_Q_STATUS_F_BIT_MASK;
+		break;
+	    default:
+		/* Should never hit */
+		IX_OSAL_ASSERT(0);
+		break;
+	    }
+
+	    /* One nibble of status per queue so need to shift the
+	     * check value and mask out to the correct position.
+	     */
+	    shiftVal = (qId % IX_QMGR_QUELOWSTAT_NUM_QUE_PER_WORD) * 
+		IX_QMGR_QUELOWSTAT_BITS_PER_Q;
+
+	    /* Calculate the which status word to check from the qId,
+	     * 8 Qs status per word
+	     */
+	    qi->statusWordOffset = qId / IX_QMGR_QUELOWSTAT_NUM_QUE_PER_WORD;
+
+	    qi->statusCheckValue <<= shiftVal;
+	    qi->statusMask <<= shiftVal;
+	} else {
+	    /* One status word */
+	    qi->statusWordOffset = 0;
+	    /* Single bits per queue and int source bit hardwired  NE,
+	     * Qs start at 32.
+	     */
+	    qi->statusMask = 1 << (qId - IX_QMGR_MIN_QUEUPP_QID);
+	    qi->statusCheckValue = qi->statusMask;
+	}
+}
+#endif
+
+static void
+aqm_int_enable(struct ixpqmgr_softc *sc, int qId)
+{
+	bus_size_t reg;
+	uint32_t v;
+	
+	if (qId < IX_QMGR_MIN_QUEUPP_QID)
+	    reg = IX_QMGR_QUEIEREG0_OFFSET;
+	else
+	    reg = IX_QMGR_QUEIEREG1_OFFSET;
+	v = aqm_reg_read(sc, reg);
+	aqm_reg_write(sc, reg, v | (1 << (qId % IX_QMGR_MIN_QUEUPP_QID)));
+
+	DPRINTF(sc->sc_dev, "%s(%u) 0x%lx: 0x%x => 0x%x\n",
+	    __func__, qId, reg, v, aqm_reg_read(sc, reg));
+}
+
+static void
+aqm_int_disable(struct ixpqmgr_softc *sc, int qId)
+{
+	bus_size_t reg;
+	uint32_t v;
+
+	if (qId < IX_QMGR_MIN_QUEUPP_QID)
+	    reg = IX_QMGR_QUEIEREG0_OFFSET;
+	else
+	    reg = IX_QMGR_QUEIEREG1_OFFSET;
+	v = aqm_reg_read(sc, reg);
+	aqm_reg_write(sc, reg, v &~ (1 << (qId % IX_QMGR_MIN_QUEUPP_QID)));
+
+	DPRINTF(sc->sc_dev, "%s(%u) 0x%lx: 0x%x => 0x%x\n",
+	    __func__, qId, reg, v, aqm_reg_read(sc, reg));
+}
+
+static unsigned
+log2(unsigned n)
+{
+	unsigned count;
+	/*
+	 * N.B. this function will return 0 if supplied 0.
+	 */
+	for (count = 0; n/2; count++)
+	    n /= 2;
+	return count;
+}
+
+static __inline unsigned
+toAqmEntrySize(int entrySize)
+{
+	/* entrySize  1("00"),2("01"),4("10") */
+	return log2(entrySize);
+}
+
+static __inline unsigned
+toAqmBufferSize(unsigned bufferSizeInWords)
+{
+	/* bufferSize 16("00"),32("01),64("10"),128("11") */
+	return log2(bufferSizeInWords / IX_QMGR_MIN_BUFFER_SIZE);
+}
+
+static __inline unsigned
+toAqmWatermark(int watermark)
+{
+	/*
+	 * Watermarks 0("000"),1("001"),2("010"),4("011"),
+	 * 8("100"),16("101"),32("110"),64("111")
+	 */
+	return log2(2 * watermark);
+}
+
+static void
+aqm_qcfg(struct ixpqmgr_softc *sc, int qId, u_int ne, u_int nf)
+{
+	const struct qmgrInfo *qi = &sc->qinfo[qId];
+	uint32_t qCfg;
+	uint32_t baseAddress;
+
+	/* Build config register */
+	qCfg = ((toAqmEntrySize(1) & IX_QMGR_ENTRY_SIZE_MASK) <<
+		    IX_QMGR_Q_CONFIG_ESIZE_OFFSET)
+	     | ((toAqmBufferSize(qi->qSizeInWords) & IX_QMGR_SIZE_MASK) <<
+		    IX_QMGR_Q_CONFIG_BSIZE_OFFSET);
+
+	/* baseAddress, calculated relative to start address */
+	baseAddress = sc->aqmFreeSramAddress;
+		       
+	/* base address must be word-aligned */
+	KASSERT((baseAddress % IX_QMGR_BASE_ADDR_16_WORD_ALIGN) == 0,
+	    ("address not word-aligned"));
+
+	/* Now convert to a 16 word pointer as required by QUECONFIG register */
+	baseAddress >>= IX_QMGR_BASE_ADDR_16_WORD_SHIFT;
+	qCfg |= baseAddress << IX_QMGR_Q_CONFIG_BADDR_OFFSET;
+
+	/* set watermarks */
+	qCfg |= (toAqmWatermark(ne) << IX_QMGR_Q_CONFIG_NE_OFFSET)
+	     |  (toAqmWatermark(nf) << IX_QMGR_Q_CONFIG_NF_OFFSET);
+
+	DPRINTF(sc->sc_dev, "%s(%u, %u, %u) 0x%x => 0x%x @ 0x%x\n",
+	    __func__, qId, ne, nf,
+	    aqm_reg_read(sc, IX_QMGR_Q_CONFIG_ADDR_GET(qId)),
+	    qCfg, IX_QMGR_Q_CONFIG_ADDR_GET(qId));
+
+	aqm_reg_write(sc, IX_QMGR_Q_CONFIG_ADDR_GET(qId), qCfg);
+}
+
+static void
+aqm_srcsel_write(struct ixpqmgr_softc *sc, int qId, int sourceId)
+{
+	bus_size_t off;
+	uint32_t v;
+
+	/*
+	 * Calculate the register offset; multiple queues split across registers
+	 */
+	off = IX_QMGR_INT0SRCSELREG0_OFFSET +
+	    ((qId / IX_QMGR_INTSRC_NUM_QUE_PER_WORD) * sizeof(uint32_t));
+
+	v = aqm_reg_read(sc, off);
+	if (off == IX_QMGR_INT0SRCSELREG0_OFFSET && qId == 0) {
+	    /* Queue 0 at INT0SRCSELREG should not corrupt the value bit-3  */
+	    v |= 0x7;
+	} else {     
+	  const uint32_t bpq = 32 / IX_QMGR_INTSRC_NUM_QUE_PER_WORD;
+	  uint32_t mask;
+	  int qshift;
+
+	  qshift = (qId & (IX_QMGR_INTSRC_NUM_QUE_PER_WORD-1)) * bpq;
+	  mask = ((1 << bpq) - 1) << qshift;	/* q's status mask */
+
+	  /* merge sourceId */
+	  v = (v &~ mask) | ((sourceId << qshift) & mask);
+	}
+
+	DPRINTF(sc->sc_dev, "%s(%u, %u) 0x%x => 0x%x @ 0x%lx\n",
+	    __func__, qId, sourceId, aqm_reg_read(sc, off), v, off);
+	aqm_reg_write(sc, off, v);
+}
+
+/*
+ * Reset AQM registers to default values.
+ */
+static void
+aqm_reset(struct ixpqmgr_softc *sc)
+{
+	int i;
+
+	/* Reset queues 0..31 status registers 0..3 */
+	aqm_reg_write(sc, IX_QMGR_QUELOWSTAT0_OFFSET,
+		IX_QMGR_QUELOWSTAT_RESET_VALUE);
+	aqm_reg_write(sc, IX_QMGR_QUELOWSTAT1_OFFSET,
+		IX_QMGR_QUELOWSTAT_RESET_VALUE);
+	aqm_reg_write(sc, IX_QMGR_QUELOWSTAT2_OFFSET,
+		IX_QMGR_QUELOWSTAT_RESET_VALUE);
+	aqm_reg_write(sc, IX_QMGR_QUELOWSTAT3_OFFSET,
+		IX_QMGR_QUELOWSTAT_RESET_VALUE);
+
+	/* Reset underflow/overflow status registers 0..1 */
+	aqm_reg_write(sc, IX_QMGR_QUEUOSTAT0_OFFSET,
+		IX_QMGR_QUEUOSTAT_RESET_VALUE);
+	aqm_reg_write(sc, IX_QMGR_QUEUOSTAT1_OFFSET,
+		IX_QMGR_QUEUOSTAT_RESET_VALUE);
+	
+	/* Reset queues 32..63 nearly empty status registers */
+	aqm_reg_write(sc, IX_QMGR_QUEUPPSTAT0_OFFSET,
+		IX_QMGR_QUEUPPSTAT0_RESET_VALUE);
+
+	/* Reset queues 32..63 full status registers */
+	aqm_reg_write(sc, IX_QMGR_QUEUPPSTAT1_OFFSET,
+		IX_QMGR_QUEUPPSTAT1_RESET_VALUE);
+
+	/* Reset int0 status flag source select registers 0..3 */
+	aqm_reg_write(sc, IX_QMGR_INT0SRCSELREG0_OFFSET,
+			     IX_QMGR_INT0SRCSELREG_RESET_VALUE);
+	aqm_reg_write(sc, IX_QMGR_INT0SRCSELREG1_OFFSET,
+			     IX_QMGR_INT0SRCSELREG_RESET_VALUE);
+	aqm_reg_write(sc, IX_QMGR_INT0SRCSELREG2_OFFSET,
+			     IX_QMGR_INT0SRCSELREG_RESET_VALUE);
+	aqm_reg_write(sc, IX_QMGR_INT0SRCSELREG3_OFFSET,
+			     IX_QMGR_INT0SRCSELREG_RESET_VALUE);
+	     
+	/* Reset queue interrupt enable register 0..1 */
+	aqm_reg_write(sc, IX_QMGR_QUEIEREG0_OFFSET,
+		IX_QMGR_QUEIEREG_RESET_VALUE);
+	aqm_reg_write(sc, IX_QMGR_QUEIEREG1_OFFSET,
+		IX_QMGR_QUEIEREG_RESET_VALUE);
+
+	/* Reset queue interrupt register 0..1 */
+	aqm_reg_write(sc, IX_QMGR_QINTREG0_OFFSET, IX_QMGR_QINTREG_RESET_VALUE);
+	aqm_reg_write(sc, IX_QMGR_QINTREG1_OFFSET, IX_QMGR_QINTREG_RESET_VALUE);
+
+	/* Reset queue configuration words 0..63 */
+	for (i = 0; i < IX_QMGR_MAX_NUM_QUEUES; i++)
+	    aqm_reg_write(sc, sc->qinfo[i].qConfigRegAddr,
+		IX_QMGR_QUECONFIG_RESET_VALUE);
+
+	/* XXX zero SRAM to simplify debugging */
+	for (i = IX_QMGR_QUEBUFFER_SPACE_OFFSET;
+	     i < IX_QMGR_AQM_SRAM_SIZE_IN_BYTES; i += sizeof(uint32_t))
+	    aqm_reg_write(sc, i, 0);
+}
+
+static device_method_t ixpqmgr_methods[] = {
+	DEVMETHOD(device_probe,		ixpqmgr_probe),
+	DEVMETHOD(device_attach,	ixpqmgr_attach),
+	DEVMETHOD(device_detach,	ixpqmgr_detach),
+
+	{ 0, 0 }
+};
+
+static driver_t ixpqmgr_driver = {
+	"ixpqmgr",
+	ixpqmgr_methods,
+	sizeof(struct ixpqmgr_softc),
+};
+static devclass_t ixpqmgr_devclass;
+
+DRIVER_MODULE(ixpqmgr, ixp, ixpqmgr_driver, ixpqmgr_devclass, 0, 0);
diff --git a/sys/arm/xscale/ixp425/ixp425_qmgr.h b/sys/arm/xscale/ixp425/ixp425_qmgr.h
new file mode 100644
index 000000000000..af021d553990
--- /dev/null
+++ b/sys/arm/xscale/ixp425/ixp425_qmgr.h
@@ -0,0 +1,243 @@
+/*-
+ * Copyright (c) 2006 Sam Leffler, Errno Consulting
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
+ *    redistribution must be conditioned upon including a substantially
+ *    similar Disclaimer requirement for further binary redistribution.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
+ * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+ * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGES.
+ *
+ * $FreeBSD$
+ */
+
+/*-
+ * Copyright (c) 2001-2005, Intel Corporation.
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Intel Corporation nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+*/
+
+#ifndef ARM_XSCALE_IXP425_QMGR_H
+#define	ARM_XSCALE_IXP425_QMGR_H
+
+#define	IX_QMGR_MAX_NUM_QUEUES		64
+#define	IX_QMGR_MIN_QUEUPP_QID		32
+
+#define IX_QMGR_MIN_ENTRY_SIZE_IN_WORDS 16
+
+/* Total size of SRAM */
+#define IX_QMGR_AQM_SRAM_SIZE_IN_BYTES 0x4000
+
+#define	IX_QMGR_Q_PRIORITY_0		0
+#define	IX_QMGR_Q_PRIORITY_1		1
+#define	IX_QMGR_Q_PRIORITY_2		2
+#define IX_QMGR_NUM_PRIORITY_LEVELS	3	/* number of priority levels */
+
+#define	IX_QMGR_Q_STATUS_E_BIT_MASK	0x1	/* Empty */
+#define	IX_QMGR_Q_STATUS_NE_BIT_MASK	0x2	/* Nearly Empty */
+#define	IX_QMGR_Q_STATUS_NF_BIT_MASK	0x4	/* Nearly Full */
+#define	IX_QMGR_Q_STATUS_F_BIT_MASK	0x8	/* Full */
+#define	IX_QMGR_Q_STATUS_UF_BIT_MASK	0x10	/* Underflow */
+#define	IX_QMGR_Q_STATUS_OF_BIT_MASK	0x20	/* Overflow */
+
+#define	IX_QMGR_Q_SOURCE_ID_E		0 /* Q Empty after last read */
+#define	IX_QMGR_Q_SOURCE_ID_NE		1 /* Q Nearly Empty after last read */
+#define	IX_QMGR_Q_SOURCE_ID_NF		2 /* Q Nearly Full after last write */
+#define	IX_QMGR_Q_SOURCE_ID_F		3 /* Q Full after last write */
+#define	IX_QMGR_Q_SOURCE_ID_NOT_E	4 /* Q !Empty after last write */
+#define	IX_QMGR_Q_SOURCE_ID_NOT_NE	5 /* Q !Nearly Empty after last write */
+#define	IX_QMGR_Q_SOURCE_ID_NOT_NF	6 /* Q !Nearly Full after last read */
+#define	IX_QMGR_Q_SOURCE_ID_NOT_F	7 /* Q !Full after last read */
+
+#define IX_QMGR_UNDERFLOW_BIT_OFFSET	0x0	/* underflow bit mask */
+#define IX_QMGR_OVERFLOW_BIT_OFFSET     0x1	/* overflow bit mask */
+
+#define IX_QMGR_QUEACC0_OFFSET		0x0000	/* q 0 access register */
+#define IX_QMGR_QUEACC_SIZE		0x4/*words*/
+
+#define IX_QMGR_QUELOWSTAT0_OFFSET	0x400	/* Q status, q's 0-7 */
+#define IX_QMGR_QUELOWSTAT1_OFFSET	0x404	/* Q status, q's 8-15 */
+#define IX_QMGR_QUELOWSTAT2_OFFSET	0x408	/* Q status, q's 16-23 */
+#define IX_QMGR_QUELOWSTAT3_OFFSET	0x40c	/* Q status, q's 24-31 */
+
+/* Queue status register Q status bits mask */
+#define IX_QMGR_QUELOWSTAT_QUE_STS_BITS_MASK 0xF
+/* Size of queue 0-31 status register */
+#define IX_QMGR_QUELOWSTAT_SIZE     0x4 /*words*/
+#define IX_QMGR_QUELOWSTAT_NUM_QUE_PER_WORD 8	/* # status/word */
+
+#define IX_QMGR_QUEUOSTAT0_OFFSET	0x410	/* Q UF/OF status, q's 0-15 */
+#define IX_QMGR_QUEUOSTAT1_OFFSET	0x414	/* Q UF/OF status, q's 16-31 */
+
+#define IX_QMGR_QUEUOSTAT_NUM_QUE_PER_WORD 16	/* # UF/OF status/word */
+
+#define IX_QMGR_QUEUPPSTAT0_OFFSET	0x418	/* NE status, q's 32-63 */
+#define IX_QMGR_QUEUPPSTAT1_OFFSET	0x41c	/* F status, q's 32-63 */
+
+#define IX_QMGR_INT0SRCSELREG0_OFFSET	0x420	/* INT src select, q's 0-7 */
+#define IX_QMGR_INT0SRCSELREG1_OFFSET	0x424	/* INT src select, q's 8-15 */
+#define IX_QMGR_INT0SRCSELREG2_OFFSET	0x428	/* INT src select, q's 16-23 */
+#define IX_QMGR_INT0SRCSELREG3_OFFSET	0x42c	/* INT src select, q's 24-31 */
+
+#define IX_QMGR_INTSRC_NUM_QUE_PER_WORD 8	/* # INT src select/word */
+
+#define IX_QMGR_QUEIEREG0_OFFSET	0x430	/* INT enable, q's 0-31 */
+#define IX_QMGR_QUEIEREG1_OFFSET	0x434	/* INT enable, q's 32-63 */
+#define IX_QMGR_QINTREG0_OFFSET		0x438	/* INT status, q's 0-31 */
+#define IX_QMGR_QINTREG1_OFFSET		0x43c	/* INT status, q's 32-63 */
+
+#define IX_QMGR_QUECONFIG_BASE_OFFSET	0x2000	/* Q config register, q 0 */
+
+#define IX_QMGR_QUECONFIG_SIZE		0x100	/* total size of Q config regs*/
+
+#define IX_QMGR_QUEBUFFER_SPACE_OFFSET	0x2100	/* start of SRAM */
+
+/* Total bits in a word */
+#define BITS_PER_WORD 32
+
+/* Size of queue buffer space */
+#define IX_QMGR_QUE_BUFFER_SPACE_SIZE 0x1F00
+
+/*
+ * This macro will return the address of the access register for the
+ * queue  specified by qId
+ */
+#define IX_QMGR_Q_ACCESS_ADDR_GET(qId)\
+        (((qId) * (IX_QMGR_QUEACC_SIZE * sizeof(uint32_t)))\
+	 + IX_QMGR_QUEACC0_OFFSET)
+
+/* 
+ * Bit location of bit-3 of INT0SRCSELREG0 register to enabled
+ * sticky interrupt register.
+ */
+#define IX_QMGR_INT0SRCSELREG0_BIT3 3
+
+/*
+ * These defines are the bit offsets of the various fields of
+ * the queue configuration register.
+ */
+#if 0
+#define IX_QMGR_Q_CONFIG_WRPTR_OFFSET       0x00
+#define IX_QMGR_Q_CONFIG_RDPTR_OFFSET       0x07
+#define IX_QMGR_Q_CONFIG_BADDR_OFFSET       0x0E
+#define IX_QMGR_Q_CONFIG_ESIZE_OFFSET       0x16
+#define IX_QMGR_Q_CONFIG_BSIZE_OFFSET       0x18
+#define IX_QMGR_Q_CONFIG_NE_OFFSET          0x1A
+#define IX_QMGR_Q_CONFIG_NF_OFFSET          0x1D
+
+#define IX_QMGR_NE_NF_CLEAR_MASK            0x03FFFFFF
+#define IX_QMGR_NE_MASK                     0x7
+#define IX_QMGR_NF_MASK                     0x7
+#define IX_QMGR_SIZE_MASK                   0x3
+#define IX_QMGR_ENTRY_SIZE_MASK             0x3
+#define IX_QMGR_BADDR_MASK                  0x003FC000
+#define IX_QMGR_RDPTR_MASK                  0x7F
+#define IX_QMGR_WRPTR_MASK                  0x7F
+#define IX_QMGR_RDWRPTR_MASK                0x00003FFF
+#else
+#define IX_QMGR_Q_CONFIG_WRPTR_OFFSET       0
+#define IX_QMGR_WRPTR_MASK                  0x7F
+#define IX_QMGR_Q_CONFIG_RDPTR_OFFSET       7
+#define IX_QMGR_RDPTR_MASK                  0x7F
+#define IX_QMGR_Q_CONFIG_BADDR_OFFSET       14
+#define IX_QMGR_BADDR_MASK                  0x3FC000	/* XXX not used */
+#define IX_QMGR_Q_CONFIG_ESIZE_OFFSET       22
+#define IX_QMGR_ENTRY_SIZE_MASK             0x3
+#define IX_QMGR_Q_CONFIG_BSIZE_OFFSET       24
+#define IX_QMGR_SIZE_MASK                   0x3
+#define IX_QMGR_Q_CONFIG_NE_OFFSET          26
+#define IX_QMGR_NE_MASK                     0x7
+#define IX_QMGR_Q_CONFIG_NF_OFFSET          29
+#define IX_QMGR_NF_MASK                     0x7
+
+#define IX_QMGR_RDWRPTR_MASK                0x00003FFF
+#define IX_QMGR_NE_NF_CLEAR_MASK            0x03FFFFFF
+#endif
+
+#define IX_QMGR_BASE_ADDR_16_WORD_ALIGN     64
+#define IX_QMGR_BASE_ADDR_16_WORD_SHIFT     6
+
+#define IX_QMGR_AQM_ADDRESS_SPACE_SIZE_IN_WORDS 0x1000
+
+/* Base address of AQM SRAM */
+#define IX_QMGR_AQM_SRAM_BASE_ADDRESS_OFFSET \
+((IX_QMGR_QUECONFIG_BASE_OFFSET) + (IX_QMGR_QUECONFIG_SIZE))
+
+/* Min buffer size used for generating buffer size in QUECONFIG */
+#define IX_QMGR_MIN_BUFFER_SIZE 16
+
+/* Reset values of QMgr hardware registers */
+#define IX_QMGR_QUELOWSTAT_RESET_VALUE    0x33333333
+#define IX_QMGR_QUEUOSTAT_RESET_VALUE     0x00000000
+#define IX_QMGR_QUEUPPSTAT0_RESET_VALUE   0xFFFFFFFF
+#define IX_QMGR_QUEUPPSTAT1_RESET_VALUE   0x00000000
+#define IX_QMGR_INT0SRCSELREG_RESET_VALUE 0x00000000
+#define IX_QMGR_QUEIEREG_RESET_VALUE      0x00000000
+#define IX_QMGR_QINTREG_RESET_VALUE       0xFFFFFFFF
+#define IX_QMGR_QUECONFIG_RESET_VALUE     0x00000000
+
+#define IX_QMGR_QUELOWSTAT_BITS_PER_Q \
+	(BITS_PER_WORD/IX_QMGR_QUELOWSTAT_NUM_QUE_PER_WORD)
+
+#define IX_QMGR_QUELOWSTAT_QID_MASK 0x7
+#define IX_QMGR_Q_CONFIG_ADDR_GET(qId)\
+        (((qId) * sizeof(uint32_t)) + IX_QMGR_QUECONFIG_BASE_OFFSET)
+
+#define IX_QMGR_ENTRY1_OFFSET 0
+#define IX_QMGR_ENTRY2_OFFSET 1
+#define IX_QMGR_ENTRY4_OFFSET 3
+
+int	ixpqmgr_qconfig(int qId, int qSizeInWords, int ne, int nf, int srcSel,
+	    void (*cb)(int, void *), void *cbarg);
+int	ixpqmgr_qwrite(int qId, uint32_t entry);
+int	ixpqmgr_qread(int qId, uint32_t *entry);
+int	ixpqmgr_qreadm(int qId, uint32_t n, uint32_t *p);
+uint32_t ixpqmgr_getqstatus(int qId);
+uint32_t ixpqmgr_getqconfig(int qId);
+void	ixpqmgr_notify_enable(int qId, int srcSel);
+void	ixpqmgr_notify_disable(int qId);
+void	ixpqmgr_dump(void);
+
+#endif /* ARM_XSCALE_IXP425_QMGR_H */
diff --git a/sys/arm/xscale/ixp425/ixp425_space.c b/sys/arm/xscale/ixp425/ixp425_space.c
new file mode 100644
index 000000000000..816ff5055680
--- /dev/null
+++ b/sys/arm/xscale/ixp425/ixp425_space.c
@@ -0,0 +1,215 @@
+/*	$NetBSD: ixp425_space.c,v 1.6 2006/04/10 03:36:03 simonb Exp $ */
+
+/*
+ * Copyright (c) 2003
+ *	Ichiro FUKUHARA <ichiro@ichiro.org>.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by Ichiro FUKUHARA.
+ * 4. The name of the company nor the name of the author may be used to
+ *    endorse or promote products derived from this software without specific
+ *    prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+/*
+ * bus_space I/O functions for ixp425
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+
+#include <machine/pcb.h>
+
+#include <vm/vm.h>
+#include <vm/vm_kern.h>
+#include <vm/pmap.h>
+#include <vm/vm_page.h>
+#include <vm/vm_extern.h>
+
+#include <machine/bus.h>
+
+#include <arm/xscale/ixp425/ixp425reg.h>
+#include <arm/xscale/ixp425/ixp425var.h>
+
+/* Proto types for all the bus_space structure functions */
+bs_protos(ixp425);
+bs_protos(generic);
+bs_protos(generic_armv4);
+
+struct bus_space ixp425_bs_tag = {
+	/* cookie */
+	.bs_cookie	= (void *) 0,
+
+	/* mapping/unmapping */
+	.bs_map		= ixp425_bs_map,
+	.bs_unmap	= ixp425_bs_unmap,
+	.bs_subregion	= ixp425_bs_subregion,
+
+	/* allocation/deallocation */
+	.bs_alloc	= ixp425_bs_alloc,
+	.bs_free	= ixp425_bs_free,
+
+	/* barrier */
+	.bs_barrier	= ixp425_bs_barrier,
+
+	/* read (single) */
+	.bs_r_1		= generic_bs_r_1,
+	.bs_r_2		= generic_armv4_bs_r_2,
+	.bs_r_4		= generic_bs_r_4,
+	.bs_r_8		= NULL,
+
+	/* read multiple */
+	.bs_rm_1	= generic_bs_rm_1,
+	.bs_rm_2	= generic_armv4_bs_rm_2,
+	.bs_rm_4	= generic_bs_rm_4,
+	.bs_rm_8	= NULL,
+
+	/* read region */
+	.bs_rr_1	= generic_bs_rr_1,
+	.bs_rr_2	= generic_armv4_bs_rr_2,
+	.bs_rr_4	= generic_bs_rr_4,
+	.bs_rr_8	= NULL,
+
+	/* write (single) */
+	.bs_w_1		= generic_bs_w_1,
+	.bs_w_2		= generic_armv4_bs_w_2,
+	.bs_w_4		= generic_bs_w_4,
+	.bs_w_8		= NULL,
+
+	/* write multiple */
+	.bs_wm_1	= generic_bs_wm_1,
+	.bs_wm_2	= generic_armv4_bs_wm_2,
+	.bs_wm_4	= generic_bs_wm_4,
+	.bs_wm_8	= NULL,
+
+	/* write region */
+	.bs_wr_1	= generic_bs_wr_1,
+	.bs_wr_2	= generic_armv4_bs_wr_2,
+	.bs_wr_4	= generic_bs_wr_4,
+	.bs_wr_8	= NULL,
+
+	/* set multiple */
+	/* XXX not implemented */
+
+	/* set region */
+	.bs_sr_1	= NULL,
+	.bs_sr_2	= generic_armv4_bs_sr_2,
+	.bs_sr_4	= generic_bs_sr_4,
+	.bs_sr_8	= NULL,
+
+	/* copy */
+	.bs_c_1		= NULL,
+	.bs_c_2		= generic_armv4_bs_c_2,
+	.bs_c_4		= NULL,
+	.bs_c_8		= NULL,
+};
+
+int
+ixp425_bs_map(void *t, bus_addr_t bpa, bus_size_t size,
+	      int cacheable, bus_space_handle_t *bshp)
+{
+	const struct pmap_devmap *pd;
+	vm_paddr_t startpa, endpa, pa, offset;
+	vm_offset_t va;
+	pt_entry_t *pte;
+
+	if ((pd = pmap_devmap_find_pa(bpa, size)) != NULL) {
+		/* Device was statically mapped. */
+		*bshp = pd->pd_va + (bpa - pd->pd_pa);
+		return (0);
+	}
+
+	endpa = round_page(bpa + size);
+	offset = bpa & PAGE_MASK;
+	startpa = trunc_page(bpa);
+
+	va = kmem_alloc(kernel_map, endpa - startpa);
+	if (va == 0)
+		return (ENOMEM);
+
+	*bshp = va + offset;
+
+	for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) {
+		pmap_kenter(va, pa);
+		pte = vtopte(va);
+		*pte &= ~L2_S_CACHE_MASK;
+		PTE_SYNC(pte);
+	}
+
+	return (0);
+}
+
+void
+ixp425_bs_unmap(void *t, bus_space_handle_t h, bus_size_t size)
+{
+	vm_offset_t va, endva;
+
+	if (pmap_devmap_find_va((vm_offset_t)t, size) != NULL) {
+		/* Device was statically mapped; nothing to do. */
+		return;
+	}
+
+	endva = round_page((vm_offset_t)t + size);
+	va = trunc_page((vm_offset_t)t);
+
+	while (va < endva) {
+		pmap_kremove(va);
+		va += PAGE_SIZE;
+	}
+	kmem_free(kernel_map, va, endva - va);
+}
+
+int
+ixp425_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend,
+	bus_size_t size, bus_size_t alignment, bus_size_t boundary, int cacheable,
+	bus_addr_t *bpap, bus_space_handle_t *bshp)
+{
+	panic("ixp425_bs_alloc(): not implemented");
+}
+
+void    
+ixp425_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
+{
+	panic("ixp425_bs_free(): not implemented");
+}
+
+int
+ixp425_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset,
+	bus_size_t size, bus_space_handle_t *nbshp)
+{
+	*nbshp = bsh + offset;
+	return (0);
+}
+
+void
+ixp425_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset,
+    bus_size_t len, int flags)
+{
+	/* Nothing to do. */
+}	
diff --git a/sys/arm/xscale/ixp425/ixp425_timer.c b/sys/arm/xscale/ixp425/ixp425_timer.c
new file mode 100644
index 000000000000..0fa9d1f1419b
--- /dev/null
+++ b/sys/arm/xscale/ixp425/ixp425_timer.c
@@ -0,0 +1,267 @@
+/*	$NetBSD: ixp425_timer.c,v 1.11 2006/04/10 03:36:03 simonb Exp $ */
+
+/*
+ * Copyright (c) 2003
+ *	Ichiro FUKUHARA <ichiro@ichiro.org>.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by Ichiro FUKUHARA.
+ * 4. The name of the company nor the name of the author may be used to
+ *    endorse or promote products derived from this software without specific
+ *    prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/time.h>
+#include <sys/bus.h>
+#include <sys/resource.h>
+#include <sys/rman.h>
+#include <sys/timetc.h>
+
+#include <machine/bus.h>
+#include <machine/cpu.h>
+#include <machine/cpufunc.h>
+#include <machine/frame.h>
+#include <machine/resource.h>
+#include <machine/intr.h>
+#include <arm/xscale/ixp425/ixp425reg.h>
+#include <arm/xscale/ixp425/ixp425var.h>
+
+static uint32_t counts_per_hz;
+
+/* callback functions for intr_functions */
+void	ixpclk_intr(void *);
+
+struct ixpclk_softc {
+	device_t		sc_dev;
+	bus_addr_t		sc_baseaddr;
+	bus_space_tag_t		sc_iot;
+	bus_space_handle_t      sc_ioh;
+};
+
+static unsigned ixp425_timer_get_timecount(struct timecounter *tc);
+
+#ifndef IXP425_CLOCK_FREQ
+#define	COUNTS_PER_SEC		66666600	/* 66MHz */
+#else
+#define	COUNTS_PER_SEC		IXP425_CLOCK_FREQ
+#endif
+#define	COUNTS_PER_USEC		((COUNTS_PER_SEC / 1000000) + 1)
+
+static struct ixpclk_softc *ixpclk_sc = NULL;
+
+#define GET_TS_VALUE(sc)	(*(volatile u_int32_t *) \
+				  (IXP425_TIMER_VBASE + IXP425_OST_TS))
+
+static struct timecounter ixp425_timer_timecounter = {
+	ixp425_timer_get_timecount,	/* get_timecount */
+	NULL, 				/* no poll_pps */
+	~0u, 				/* counter_mask */
+	COUNTS_PER_SEC,			/* frequency */
+	"IXP425 Timer", 		/* name */
+	1000,				/* quality */
+};
+
+static int
+ixpclk_probe(device_t dev)
+{
+	device_set_desc(dev, "IXP425 Timer");
+	return (0);
+}
+
+static int
+ixpclk_attach(device_t dev)
+{
+	struct ixpclk_softc *sc = device_get_softc(dev);
+	struct ixp425_softc *sa = device_get_softc(device_get_parent(dev));
+
+	ixpclk_sc = sc;
+
+	sc->sc_dev = dev;
+	sc->sc_iot = sa->sc_iot;
+	sc->sc_baseaddr = IXP425_TIMER_HWBASE;
+
+	if (bus_space_map(sc->sc_iot, sc->sc_baseaddr, 8, 0,
+			  &sc->sc_ioh))
+		panic("%s: Cannot map registers", device_get_name(dev));
+
+	return (0);
+}
+
+static device_method_t ixpclk_methods[] = {
+	DEVMETHOD(device_probe, ixpclk_probe),
+	DEVMETHOD(device_attach, ixpclk_attach),
+	{0, 0},
+};
+
+static driver_t ixpclk_driver = {
+	"ixpclk",
+	ixpclk_methods,
+	sizeof(struct ixpclk_softc),
+};
+static devclass_t ixpclk_devclass;
+
+DRIVER_MODULE(ixpclk, ixp, ixpclk_driver, ixpclk_devclass, 0, 0);
+static unsigned
+ixp425_timer_get_timecount(struct timecounter *tc)
+{
+	uint32_t ret;
+
+	ret = GET_TS_VALUE(sc);
+	return (ret);
+}
+
+/*
+ * cpu_initclocks:
+ *
+ *	Initialize the clock and get them going.
+ */
+void
+cpu_initclocks(void)
+{
+	struct ixpclk_softc* sc = ixpclk_sc;
+	struct resource *irq;
+	device_t dev = sc->sc_dev;
+	u_int oldirqstate;
+	int rid = 0;
+	void *ihl;
+
+	if (hz < 50 || COUNTS_PER_SEC % hz) {
+		printf("Cannot get %d Hz clock; using 100 Hz\n", hz);
+		hz = 100;
+	}
+	tick = 1000000 / hz;	/* number of microseconds between interrupts */
+
+	/*
+	 * We only have one timer available; stathz and profhz are
+	 * always left as 0 (the upper-layer clock code deals with
+	 * this situation).
+	 */
+	if (stathz != 0)
+		printf("Cannot get %d Hz statclock\n", stathz);
+	stathz = 0;
+
+	if (profhz != 0)
+		printf("Cannot get %d Hz profclock\n", profhz);
+	profhz = 0;
+
+	/* Report the clock frequency. */
+
+	oldirqstate = disable_interrupts(I32_bit);
+
+	irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, IXP425_INT_TMR0,
+	    IXP425_INT_TMR0, 1, RF_ACTIVE);
+	if (!irq)
+		panic("Unable to setup the clock irq handler.\n");
+	else
+		bus_setup_intr(dev, irq, INTR_TYPE_CLK | INTR_FAST,
+		    ixpclk_intr, NULL, &ihl);
+
+	/* Set up the new clock parameters. */
+
+	/* clear interrupt */
+	bus_space_write_4(sc->sc_iot, sc->sc_ioh, IXP425_OST_STATUS,
+			  OST_WARM_RESET | OST_WDOG_INT | OST_TS_INT |
+			  OST_TIM1_INT | OST_TIM0_INT);
+
+	counts_per_hz = COUNTS_PER_SEC / hz;
+
+	/* reload value & Timer enable */
+	bus_space_write_4(sc->sc_iot, sc->sc_ioh, IXP425_OST_TIM0_RELOAD,
+			  (counts_per_hz & TIMERRELOAD_MASK) | OST_TIMER_EN);
+
+	tc_init(&ixp425_timer_timecounter);
+	restore_interrupts(oldirqstate);
+	rid = 0;
+}
+
+
+/*
+ * DELAY:
+ *
+ *	Delay for at least N microseconds.
+ */
+void
+DELAY(int n)
+{
+	u_int32_t first, last;
+	int usecs;
+
+	if (n == 0)
+		return;
+
+	/*
+	 * Clamp the timeout at a maximum value (about 32 seconds with
+	 * a 66MHz clock). *Nobody* should be delay()ing for anywhere
+	 * near that length of time and if they are, they should be hung
+	 * out to dry.
+	 */
+	if (n >= (0x80000000U / COUNTS_PER_USEC))
+		usecs = (0x80000000U / COUNTS_PER_USEC) - 1;
+	else
+		usecs = n * COUNTS_PER_USEC;
+
+	/* Note: Timestamp timer counts *up*, unlike the other timers */
+	first = GET_TS_VALUE();
+
+	while (usecs > 0) {
+		last = GET_TS_VALUE();
+		usecs -= (int)(last - first);
+		first = last;
+	}
+}
+
+/*
+ * ixpclk_intr:
+ *
+ *	Handle the hardclock interrupt.
+ */
+void
+ixpclk_intr(void *arg)
+{
+	struct ixpclk_softc* sc = ixpclk_sc;
+	struct trapframe *frame = arg;
+
+	bus_space_write_4(sc->sc_iot, sc->sc_ioh, IXP425_OST_STATUS,
+			  OST_TIM0_INT);
+
+	hardclock(TRAPF_USERMODE(frame), TRAPF_PC(frame));
+}
+
+void
+cpu_startprofclock(void)
+{
+}
+
+void
+cpu_stopprofclock(void)
+{
+}
diff --git a/sys/arm/xscale/ixp425/ixp425_wdog.c b/sys/arm/xscale/ixp425/ixp425_wdog.c
new file mode 100644
index 000000000000..a94ef0a83c92
--- /dev/null
+++ b/sys/arm/xscale/ixp425/ixp425_wdog.c
@@ -0,0 +1,118 @@
+/*-
+ * Copyright (c) 2006 Sam Leffler.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+/*
+ * IXP425 Watchdog Timer Support.
+ */
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/time.h>
+#include <sys/bus.h>
+#include <sys/resource.h>
+#include <sys/rman.h>
+#include <sys/watchdog.h>
+
+#include <machine/bus.h>
+#include <machine/cpu.h>
+#include <machine/cpufunc.h>
+#include <machine/frame.h>
+#include <machine/resource.h>
+#include <machine/intr.h>
+
+#include <arm/xscale/ixp425/ixp425reg.h>
+#include <arm/xscale/ixp425/ixp425var.h>
+
+struct ixpwdog_softc {
+	device_t		sc_dev;
+};
+
+static __inline uint32_t
+RD4(struct ixpwdog_softc *sc, bus_size_t off)
+{
+	return bus_space_read_4(&ixp425_bs_tag, IXP425_TIMER_VBASE, off);
+}
+
+static __inline void
+WR4(struct ixpwdog_softc *sc, bus_size_t off, uint32_t val)
+{
+	bus_space_write_4(&ixp425_bs_tag, IXP425_TIMER_VBASE, off, val);
+}
+
+static void
+ixp425_watchdog(void *arg, u_int cmd, int *error)
+{
+	struct ixpwdog_softc *sc = arg;
+	u_int u = cmd & WD_INTERVAL;
+
+	WR4(sc, IXP425_OST_WDOG_KEY, OST_WDOG_KEY_MAJICK);
+	if (cmd && 4 <= u && u <= 35) {
+		WR4(sc, IXP425_OST_WDOG_ENAB, 0);
+		/* approximate 66.66MHz cycles */
+		WR4(sc, IXP425_OST_WDOG, 2<<(u - 4));
+		/* NB: reset on timer expiration */
+		WR4(sc, IXP425_OST_WDOG_ENAB,
+		    OST_WDOG_ENAB_CNT_ENA | OST_WDOG_ENAB_RST_ENA);
+		*error = 0;
+	} else {
+		/* disable watchdog */
+		WR4(sc, IXP425_OST_WDOG_ENAB, 0);
+	}
+	WR4(sc, IXP425_OST_WDOG_KEY, 0);
+}
+
+static int
+ixpwdog_probe(device_t dev)
+{
+	device_set_desc(dev, "IXP425 Watchdog Timer");
+	return (0);
+}
+
+static int
+ixpwdog_attach(device_t dev)
+{
+	struct ixpwdog_softc *sc = device_get_softc(dev);
+
+	sc->sc_dev = dev;
+
+	EVENTHANDLER_REGISTER(watchdog_list, ixp425_watchdog, sc, 0);
+	return (0);
+}
+
+static device_method_t ixpwdog_methods[] = {
+	DEVMETHOD(device_probe,		ixpwdog_probe),
+	DEVMETHOD(device_attach,	ixpwdog_attach),
+	{0, 0},
+};
+
+static driver_t ixpwdog_driver = {
+	"ixpwdog",
+	ixpwdog_methods,
+	sizeof(struct ixpwdog_softc),
+};
+static devclass_t ixpwdog_devclass;
+DRIVER_MODULE(ixpwdog, ixp, ixpwdog_driver, ixpwdog_devclass, 0, 0);
diff --git a/sys/arm/xscale/ixp425/ixp425reg.h b/sys/arm/xscale/ixp425/ixp425reg.h
new file mode 100644
index 000000000000..55e1fd938c94
--- /dev/null
+++ b/sys/arm/xscale/ixp425/ixp425reg.h
@@ -0,0 +1,582 @@
+/*	$NetBSD: ixp425reg.h,v 1.19 2005/12/11 12:16:51 christos Exp $ */
+/*
+ * Copyright (c) 2003
+ *	Ichiro FUKUHARA <ichiro@ichiro.org>.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by Ichiro FUKUHARA.
+ * 4. The name of the company nor the name of the author may be used to
+ *    endorse or promote products derived from this software without specific
+ *    prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ *
+ */
+
+#ifndef _IXP425REG_H_
+#define _IXP425REG_H_
+
+/*
+ * Physical memory map for the Intel IXP425
+ */
+/*
+ * CC00 00FF ---------------------------
+ *           SDRAM Configuration Registers
+ * CC00 0000 ---------------------------
+ *
+ * C800 BFFF ---------------------------
+ *           System and Peripheral Registers
+ * C800 0000 ---------------------------
+ *           Expansion Bus Configuration Registers
+ * C400 0000 ---------------------------
+ *           PCI Configuration and Status Registers
+ * C000 0000 ---------------------------
+ *
+ * 6400 0000 ---------------------------
+ *           Queue manager
+ * 6000 0000 ---------------------------
+ *           Expansion Bus Data
+ * 5000 0000 ---------------------------
+ *           PCI Data
+ * 4800 0000 ---------------------------
+ *
+ * 4000 0000 ---------------------------
+ *           SDRAM
+ * 1000 0000 ---------------------------
+ */           
+
+/*
+ * Virtual memory map for the Intel IXP425 integrated devices
+ */
+/*
+ * FFFF FFFF ---------------------------
+ *
+ * FC00 0000 ---------------------------
+ *           PCI Data (memory space)
+ * F800 0000 ---------------------------
+ *
+ * F020 1000 ---------------------------
+ *           SDRAM Controller
+ * F020 0000 ---------------------------
+ *
+ * F001 2000 ---------------------------
+ *           PCI Configuration and Status Registers
+ * F001 1000 ---------------------------
+ *           Expansion bus Configuration Registers
+ * F001 0000 ---------------------------
+ *           System and Peripheral Registers
+ *            VA F000 0000 = PA C800 0000 (SIZE 0x10000)
+ * F000 0000 ---------------------------
+ *
+ * 0000 0000 ---------------------------
+ *
+ */
+
+/* Physical/Virtual address for I/O space */
+
+#define	IXP425_IO_VBASE		0xf0000000UL
+#define	IXP425_IO_HWBASE	0xc8000000UL
+#define	IXP425_IO_SIZE		0x00010000UL
+
+/* Offset */
+
+#define	IXP425_UART0_OFFSET	0x00000000UL
+#define	IXP425_UART1_OFFSET	0x00001000UL
+#define	IXP425_PMC_OFFSET	0x00002000UL
+#define	IXP425_INTR_OFFSET	0x00003000UL
+#define	IXP425_GPIO_OFFSET	0x00004000UL
+#define	IXP425_TIMER_OFFSET	0x00005000UL
+#define	IXP425_NPE_A_OFFSET	0x00006000UL	/* Not User Programmable */
+#define	IXP425_NPE_B_OFFSET	0x00007000UL	/* Not User Programmable */
+#define	IXP425_NPE_C_OFFSET	0x00008000UL	/* Not User Programmable */
+#define	IXP425_MAC_A_OFFSET	0x00009000UL
+#define	IXP425_MAC_B_OFFSET	0x0000a000UL
+#define	IXP425_USB_OFFSET	0x0000b000UL
+
+#define	IXP425_REG_SIZE		0x1000
+
+/*
+ * UART
+ * 	UART0 0xc8000000
+ * 	UART1 0xc8001000
+ *
+ */
+/* I/O space */
+#define	IXP425_UART0_HWBASE	(IXP425_IO_HWBASE + IXP425_UART0_OFFSET)
+#define	IXP425_UART1_HWBASE	(IXP425_IO_HWBASE + IXP425_UART1_OFFSET)
+
+#define	IXP425_UART0_VBASE	(IXP425_IO_VBASE + IXP425_UART0_OFFSET)
+						/* 0xf0000000 */
+#define	IXP425_UART1_VBASE	(IXP425_IO_VBASE + IXP425_UART1_OFFSET)
+						/* 0xf0001000 */
+
+#define	IXP425_UART_FREQ	14745600
+
+#define	IXP425_UART_IER		0x01	/* interrupt enable register */
+#define	IXP425_UART_IER_RTOIE	0x10	/* receiver timeout interrupt enable */
+#define	IXP425_UART_IER_UUE	0x40	/* UART Unit enable */
+
+/*#define	IXP4XX_COM_NPORTS	8*/
+
+/*
+ * Timers
+ *
+ */
+#define	IXP425_TIMER_HWBASE	(IXP425_IO_HWBASE + IXP425_TIMER_OFFSET)
+#define	IXP425_TIMER_VBASE	(IXP425_IO_VBASE + IXP425_TIMER_OFFSET)
+
+#define	IXP425_OST_TS		0x0000
+#define	IXP425_OST_TIM0		0x0004
+#define	IXP425_OST_TIM1		0x000C
+
+#define	IXP425_OST_TIM0_RELOAD	0x0008
+#define	IXP425_OST_TIM1_RELOAD	0x0010
+#define	TIMERRELOAD_MASK	0xFFFFFFFC
+#define	OST_ONESHOT_EN		(1U << 1)
+#define	OST_TIMER_EN		(1U << 0)
+
+#define	IXP425_OST_STATUS	0x0020
+#define	OST_WARM_RESET		(1U << 4)
+#define	OST_WDOG_INT		(1U << 3)
+#define	OST_TS_INT		(1U << 2)
+#define	OST_TIM1_INT		(1U << 1)
+#define	OST_TIM0_INT		(1U << 0)
+
+#define	IXP425_OST_WDOG		0x0014
+#define	IXP425_OST_WDOG_ENAB	0x0018
+#define	IXP425_OST_WDOG_KEY	0x001c
+#define	OST_WDOG_KEY_MAJICK	0x482e
+#define	OST_WDOG_ENAB_RST_ENA	(1u << 0)
+#define	OST_WDOG_ENAB_INT_ENA	(1u << 1)
+#define	OST_WDOG_ENAB_CNT_ENA	(1u << 2)
+
+/*
+ * Interrupt Controller Unit.
+ *  PA 0xc8003000
+ */
+
+#define	IXP425_IRQ_HWBASE	IXP425_IO_HWBASE + IXP425_INTR_OFFSET
+#define	IXP425_IRQ_VBASE	IXP425_IO_VBASE  + IXP425_INTR_OFFSET
+						/* 0xf0003000 */
+#define	IXP425_IRQ_SIZE		0x00000020UL
+
+#define	IXP425_INT_STATUS	(IXP425_IRQ_VBASE + 0x00)
+#define	IXP425_INT_ENABLE	(IXP425_IRQ_VBASE + 0x04)
+#define	IXP425_INT_SELECT	(IXP425_IRQ_VBASE + 0x08)
+#define	IXP425_IRQ_STATUS	(IXP425_IRQ_VBASE + 0x0C)
+#define	IXP425_FIQ_STATUS	(IXP425_IRQ_VBASE + 0x10)
+#define	IXP425_INT_PRTY		(IXP425_IRQ_VBASE + 0x14)
+#define	IXP425_IRQ_ENC		(IXP425_IRQ_VBASE + 0x18)
+#define	IXP425_FIQ_ENC		(IXP425_IRQ_VBASE + 0x1C)
+
+#define	IXP425_INT_SW1		31	/* SW Interrupt 1 */
+#define	IXP425_INT_SW0		30	/* SW Interrupt 0 */
+#define	IXP425_INT_GPIO_12	29	/* GPIO 12 */
+#define	IXP425_INT_GPIO_11	28	/* GPIO 11 */
+#define	IXP425_INT_GPIO_10	27	/* GPIO 11 */
+#define	IXP425_INT_GPIO_9	26	/* GPIO 9 */
+#define	IXP425_INT_GPIO_8	25	/* GPIO 8 */
+#define	IXP425_INT_GPIO_7	24	/* GPIO 7 */
+#define	IXP425_INT_GPIO_6	23	/* GPIO 6 */
+#define	IXP425_INT_GPIO_5	22	/* GPIO 5 */
+#define	IXP425_INT_GPIO_4	21	/* GPIO 4 */
+#define	IXP425_INT_GPIO_3	20	/* GPIO 3 */
+#define	IXP425_INT_GPIO_2	19	/* GPIO 2 */
+#define	IXP425_INT_XSCALE_PMU	18	/* XScale PMU */
+#define	IXP425_INT_AHB_PMU	17	/* AHB PMU */
+#define	IXP425_INT_WDOG		16	/* Watchdog Timer */
+#define	IXP425_INT_UART0	15	/* HighSpeed UART */
+#define	IXP425_INT_STAMP	14	/* Timestamp Timer */
+#define	IXP425_INT_UART1	13	/* Console UART */
+#define	IXP425_INT_USB		12	/* USB */
+#define	IXP425_INT_TMR1		11	/* General-Purpose Timer1 */
+#define	IXP425_INT_PCIDMA2	10	/* PCI DMA Channel 2 */
+#define	IXP425_INT_PCIDMA1	 9	/* PCI DMA Channel 1 */
+#define	IXP425_INT_PCIINT	 8	/* PCI Interrupt */
+#define	IXP425_INT_GPIO_1	 7	/* GPIO 1 */
+#define	IXP425_INT_GPIO_0	 6	/* GPIO 0 */
+#define	IXP425_INT_TMR0		 5	/* General-Purpose Timer0 */
+#define	IXP425_INT_QUE33_64	 4	/* Queue Manager 33-64 */
+#define	IXP425_INT_QUE1_32	 3	/* Queue Manager  1-32 */
+#define	IXP425_INT_NPE_C	 2	/* NPE C */
+#define	IXP425_INT_NPE_B	 1	/* NPE B */
+#define	IXP425_INT_NPE_A	 0	/* NPE A */
+
+/*
+ * software interrupt
+ */
+#define	IXP425_INT_bit31	31
+#define	IXP425_INT_bit30	30
+#define	IXP425_INT_bit14	14
+#define	IXP425_INT_bit11	11
+
+#define	IXP425_INT_HWMASK	(0xffffffff & \
+					~((1 << IXP425_INT_bit31) | \
+					  (1 << IXP425_INT_bit30) | \
+					  (1 << IXP425_INT_bit14) | \
+					  (1 << IXP425_INT_bit11)))
+#define	IXP425_INT_GPIOMASK	(0x3ff800c0u)
+
+/*
+ * GPIO
+ */
+#define	IXP425_GPIO_HWBASE	IXP425_IO_HWBASE + IXP425_GPIO_OFFSET
+#define IXP425_GPIO_VBASE	IXP425_IO_VBASE  + IXP425_GPIO_OFFSET
+					/* 0xf0004000 */
+#define IXP425_GPIO_SIZE	0x00000020UL
+
+#define	IXP425_GPIO_GPOUTR	0x00
+#define	IXP425_GPIO_GPOER	0x04
+#define	IXP425_GPIO_GPINR	0x08
+#define	IXP425_GPIO_GPISR	0x0c
+#define	IXP425_GPIO_GPIT1R	0x10
+#define	IXP425_GPIO_GPIT2R	0x14
+#define	IXP425_GPIO_GPCLKR	0x18
+# define GPCLKR_MUX14	(1U << 8)
+# define GPCLKR_CLK0TC_SHIFT	4
+# define GPCLKR_CLK0DC_SHIFT	0
+
+/* GPIO Output */
+#define	GPOUT_ON		0x1
+#define	GPOUT_OFF		0x0
+
+/* GPIO direction */
+#define	GPOER_INPUT		0x1
+#define	GPOER_OUTPUT		0x0
+
+/* GPIO Type bits */
+#define	GPIO_TYPE_ACT_HIGH	0x0
+#define	GPIO_TYPE_ACT_LOW	0x1
+#define	GPIO_TYPE_EDG_RISING	0x2
+#define	GPIO_TYPE_EDG_FALLING	0x3
+#define	GPIO_TYPE_TRANSITIONAL	0x4
+#define	GPIO_TYPE_MASK		0x7
+#define	GPIO_TYPE(b,v)		((v) << (((b) & 0x7) * 3))
+#define	GPIO_TYPE_REG(b)	(((b)&8)?IXP425_GPIO_GPIT2R:IXP425_GPIO_GPIT1R)
+
+/*
+ * Expansion Bus Configuration Space.
+ */
+#define	IXP425_EXP_HWBASE	0xc4000000UL
+#define	IXP425_EXP_VBASE	(IXP425_IO_VBASE + IXP425_IO_SIZE)
+						/* 0xf0010000 */
+#define	IXP425_EXP_SIZE		IXP425_REG_SIZE	/* 0x1000 */
+
+/* offset */
+#define	EXP_TIMING_CS0_OFFSET		0x0000
+#define	EXP_TIMING_CS1_OFFSET		0x0004
+#define	EXP_TIMING_CS2_OFFSET		0x0008
+#define	EXP_TIMING_CS3_OFFSET		0x000c
+#define	EXP_TIMING_CS4_OFFSET		0x0010
+#define	EXP_TIMING_CS5_OFFSET		0x0014
+#define	EXP_TIMING_CS6_OFFSET		0x0018
+#define	EXP_TIMING_CS7_OFFSET		0x001c
+#define EXP_CNFG0_OFFSET		0x0020
+#define EXP_CNFG1_OFFSET		0x0024
+#define	EXP_FCTRL_OFFSET		0x0028
+
+#define IXP425_EXP_RECOVERY_SHIFT	16
+#define IXP425_EXP_HOLD_SHIFT		20
+#define IXP425_EXP_STROBE_SHIFT		22
+#define IXP425_EXP_SETUP_SHIFT		26
+#define IXP425_EXP_ADDR_SHIFT		28
+#define IXP425_EXP_CS_EN		(1U << 31)
+
+#define IXP425_EXP_RECOVERY_T(x)	(((x) & 15) << IXP425_EXP_RECOVERY_SHIFT)
+#define IXP425_EXP_HOLD_T(x)		(((x) & 3)  << IXP425_EXP_HOLD_SHIFT)
+#define IXP425_EXP_STROBE_T(x)		(((x) & 15) << IXP425_EXP_STROBE_SHIFT)
+#define IXP425_EXP_SETUP_T(x)		(((x) & 3)  << IXP425_EXP_SETUP_SHIFT)
+#define IXP425_EXP_ADDR_T(x)		(((x) & 3)  << IXP425_EXP_ADDR_SHIFT)
+
+/* EXP_CSn bits */
+#define EXP_BYTE_EN		0x00000001	/* bus uses only 8-bit data */
+#define EXP_WR_EN		0x00000002	/* ena writes to CS region */
+/* bit 2 is reserved */
+#define EXP_SPLT_EN		0x00000008	/* ena AHB split transfers */
+#define EXP_MUX_EN		0x00000010	/* multiplexed address/data */
+#define EXP_HRDY_POL		0x00000020	/* HPI|HRDY polarity */
+#define EXP_BYTE_RD16		0x00000040	/* byte rd access to word dev */
+#define	EXP_CNFG		0x00003c00	/* device config size */
+#define EXP_SZ_512		(0 << 10)
+#define EXP_SZ_1K		(1 << 10)
+#define EXP_SZ_2K		(2 << 10)
+#define EXP_SZ_4K		(3 << 10)
+#define EXP_SZ_8K		(4 << 10)
+#define EXP_SZ_16K		(5 << 10)
+#define EXP_SZ_32K		(6 << 10)
+#define EXP_SZ_64K		(7 << 10)
+#define EXP_SZ_128K		(8 << 10)
+#define EXP_SZ_256K		(9 << 10)
+#define EXP_SZ_512K		(10 << 10)
+#define EXP_SZ_1M		(11 << 10)
+#define EXP_SZ_2M		(12 << 10)
+#define EXP_SZ_4M		(13 << 10)
+#define EXP_SZ_8M		(14 << 10)
+#define EXP_SZ_16M		(15 << 10)
+#define	EXP_CYC_TYPE		0x0000c000	/* bus cycle "type" */
+#define EXP_CYC_INTEL		(0 << 14)
+#define EXP_CYC_MOTO		(1 << 14)
+#define EXP_CYC_HPI		(2 << 14)
+#define	EXP_T5			0x000f0000	/* recovery timing */
+#define	EXP_T4			0x00300000	/* hold timing */
+#define	EXP_T3			0x03c00000	/* strobe timing */
+#define	EXP_T2			0x0c000000	/* setup/chip select timing */
+#define	EXP_T1			0x30000000	/* address timing */
+/* bit 30 is reserved */
+#define	EXP_CS_EN		0x80000000	/* chip select enabled */
+
+/* EXP_CNFG0 bits */
+#define EXP_CNFG0_8BIT             (1 << 0)
+#define EXP_CNFG0_PCI_HOST         (1 << 1)
+#define EXP_CNFG0_PCI_ARB          (1 << 2)
+#define EXP_CNFG0_PCI_66MHZ        (1 << 4)
+#define EXP_CNFG0_MEM_MAP          (1 << 31)
+
+/* EXP_CNFG1 bits */
+#define EXP_CNFG1_SW_INT0          (1 << 0)
+#define EXP_CNFG1_SW_INT1          (1 << 1)
+
+#define	EXP_FCTRL_RCOMP		(1<<0)
+#define	EXP_FCTRL_USB		(1<<1)
+#define	EXP_FCTRL_HASH		(1<<2)
+#define	EXP_FCTRL_AES		(1<<3)
+#define	EXP_FCTRL_DES		(1<<4)
+#define	EXP_FCTRL_HDLC		(1<<5)
+#define	EXP_FCTRL_AAL		(1<<6)
+#define	EXP_FCTRL_HSS		(1<<7)
+#define	EXP_FCTRL_UTOPIA	(1<<8)
+#define	EXP_FCTRL_ETH0		(1<<9)
+#define	EXP_FCTRL_ETH1		(1<<10)
+#define	EXP_FCTRL_NPEA		(1<<11)
+#define	EXP_FCTRL_NPEB		(1<<12)
+#define	EXP_FCTRL_NPEC		(1<<13)
+#define	EXP_FCTRL_PCI		(1<<14)
+/* XXX more stuff we don't care about */
+
+/*
+ * PCI
+ */
+#define IXP425_PCI_HWBASE	0xc0000000
+#define IXP425_PCI_VBASE	(IXP425_EXP_VBASE + IXP425_EXP_SIZE)
+							/* 0xf0011000 */
+#define	IXP425_PCI_SIZE		IXP425_REG_SIZE		/* 0x1000 */
+
+/*
+ * Mapping registers of IXP425 PCI Configuration
+ */
+/* PCI_ID_REG			0x00 */
+/* PCI_COMMAND_STATUS_REG	0x04 */
+/* PCI_CLASS_REG		0x08 */
+/* PCI_BHLC_REG			0x0c */
+#define	PCI_MAPREG_BAR0		0x10	/* Base Address 0 */
+#define	PCI_MAPREG_BAR1		0x14	/* Base Address 1 */
+#define	PCI_MAPREG_BAR2		0x18	/* Base Address 2 */
+#define	PCI_MAPREG_BAR3		0x1c	/* Base Address 3 */
+#define	PCI_MAPREG_BAR4		0x20	/* Base Address 4 */
+#define	PCI_MAPREG_BAR5		0x24	/* Base Address 5 */
+/* PCI_SUBSYS_ID_REG		0x2c */
+/* PCI_INTERRUPT_REG		0x3c */
+#define	PCI_RTOTTO		0x40
+
+/* PCI Controller CSR Base Address */
+#define	IXP425_PCI_CSR_BASE	IXP425_PCI_VBASE
+
+/* PCI Memory Space */
+#define	IXP425_PCI_MEM_HWBASE	0x48000000UL
+#define	IXP425_PCI_MEM_VBASE	0xf8000000UL
+#define	IXP425_PCI_MEM_SIZE	0x04000000UL	/* 64MB */
+
+/* PCI I/O Space */
+#define	IXP425_PCI_IO_HWBASE	0x00000000UL
+#define	IXP425_PCI_IO_SIZE	0x00100000UL    /* 1Mbyte */
+
+/* PCI Controller Configuration Offset */
+#define	PCI_NP_AD		0x00
+#define	PCI_NP_CBE		0x04
+# define NP_CBE_SHIFT		4
+#define	PCI_NP_WDATA		0x08
+#define	PCI_NP_RDATA		0x0c
+#define	PCI_CRP_AD_CBE		0x10
+#define	PCI_CRP_AD_WDATA	0x14
+#define	PCI_CRP_AD_RDATA	0x18
+#define	PCI_CSR			0x1c
+# define CSR_PRST		(1U << 16)
+# define CSR_IC			(1U << 15)
+# define CSR_ABE		(1U << 4)
+# define CSR_PDS		(1U << 3)
+# define CSR_ADS		(1U << 2)
+# define CSR_HOST		(1U << 0)
+#define	PCI_ISR			0x20
+# define ISR_AHBE		(1U << 3)
+# define ISR_PPE		(1U << 2)
+# define ISR_PFE		(1U << 1)
+# define ISR_PSE		(1U << 0)
+#define	PCI_INTEN		0x24
+#define	PCI_DMACTRL		0x28
+#define	PCI_AHBMEMBASE		0x2c
+#define	PCI_AHBIOBASE		0x30
+#define	PCI_PCIMEMBASE		0x34
+#define	PCI_AHBDOORBELL		0x38
+#define	PCI_PCIDOORBELL		0x3c
+#define	PCI_ATPDMA0_AHBADDR	0x40
+#define	PCI_ATPDMA0_PCIADDR	0x44
+#define	PCI_ATPDMA0_LENGTH	0x48
+#define	PCI_ATPDMA1_AHBADDR	0x4c
+#define	PCI_ATPDMA1_PCIADDR	0x50
+#define	PCI_ATPDMA1_LENGTH	0x54
+#define	PCI_PTADMA0_AHBADDR	0x58
+#define	PCI_PTADMA0_PCIADDR	0x5c
+#define	PCI_PTADMA0_LENGTH	0x60
+#define	PCI_PTADMA1_AHBADDR	0x64
+#define	PCI_PTADMA1_PCIADDR	0x68
+#define	PCI_PTADMA1_LENGTH	0x6c
+
+/* PCI target(T)/initiator(I) Interface Commands for PCI_NP_CBE register */
+#define	COMMAND_NP_IA		0x0	/* Interrupt Acknowledge   (I)*/
+#define	COMMAND_NP_SC		0x1	/* Special Cycle	   (I)*/
+#define	COMMAND_NP_IO_READ	0x2	/* I/O Read		(T)(I) */
+#define	COMMAND_NP_IO_WRITE	0x3	/* I/O Write		(T)(I) */
+#define	COMMAND_NP_MEM_READ	0x6	/* Memory Read		(T)(I) */
+#define	COMMAND_NP_MEM_WRITE	0x7	/* Memory Write		(T)(I) */
+#define	COMMAND_NP_CONF_READ	0xa	/* Configuration Read	(T)(I) */
+#define	COMMAND_NP_CONF_WRITE	0xb	/* Configuration Write	(T)(I) */
+
+/* PCI byte enables */
+#define	BE_8BIT(a)		((0x10u << ((a) & 0x03)) ^ 0xf0)
+#define	BE_16BIT(a)		((0x30u << ((a) & 0x02)) ^ 0xf0)
+#define	BE_32BIT(a)		0x00
+
+/* PCI byte selects */
+#define	READ_8BIT(v,a)		((u_int8_t)((v) >> (((a) & 3) * 8)))
+#define	READ_16BIT(v,a)		((u_int16_t)((v) >> (((a) & 2) * 8)))
+#define	WRITE_8BIT(v,a)		(((u_int32_t)(v)) << (((a) & 3) * 8))
+#define	WRITE_16BIT(v,a)	(((u_int32_t)(v)) << (((a) & 2) * 8))
+
+/* PCI Controller Configuration Commands for PCI_CRP_AD_CBE */
+#define COMMAND_CRP_READ	0x00
+#define COMMAND_CRP_WRITE	(1U << 16)
+
+/*
+ * SDRAM Configuration Register
+ */
+#define	IXP425_MCU_HWBASE	0xcc000000UL
+#define IXP425_MCU_VBASE	0xf0200000UL
+#define	IXP425_MCU_SIZE		0x1000		/* Actually only 256 bytes */
+#define	MCU_SDR_CONFIG		0x00
+#define  MCU_SDR_CONFIG_MCONF(x) ((x) & 0x7)
+#define  MCU_SDR_CONFIG_64MBIT	(1u << 5)
+#define	MCU_SDR_REFRESH		0x04
+#define	MCU_SDR_IR		0x08
+
+/*
+ * Performance Monitoring Unit          (CP14)
+ *
+ *      CP14.0.1	Performance Monitor Control Register(PMNC)
+ *      CP14.1.1	Clock Counter(CCNT)
+ *      CP14.4.1	Interrupt Enable Register(INTEN)
+ *      CP14.5.1	Overflow Flag Register(FLAG)
+ *      CP14.8.1	Event Selection Register(EVTSEL)
+ *      CP14.0.2	Performance Counter Register 0(PMN0)
+ *      CP14.1.2	Performance Counter Register 0(PMN1)
+ *      CP14.2.2	Performance Counter Register 0(PMN2)
+ *      CP14.3.2	Performance Counter Register 0(PMN3)
+ */
+
+#define	PMNC_E		0x00000001	/* enable all counters */
+#define	PMNC_P		0x00000002	/* reset all PMNs to 0 */
+#define	PMNC_C		0x00000004	/* clock counter reset */
+#define	PMNC_D		0x00000008	/* clock counter / 64 */
+
+#define INTEN_CC_IE	0x00000001	/* enable clock counter interrupt */
+#define	INTEN_PMN0_IE	0x00000002	/* enable PMN0 interrupt */
+#define	INTEN_PMN1_IE	0x00000004	/* enable PMN1 interrupt */
+#define	INTEN_PMN2_IE	0x00000008	/* enable PMN2 interrupt */
+#define	INTEN_PMN3_IE	0x00000010	/* enable PMN3 interrupt */
+
+#define	FLAG_CC_IF	0x00000001	/* clock counter overflow */
+#define	FLAG_PMN0_IF	0x00000002	/* PMN0 overflow */
+#define	FLAG_PMN1_IF	0x00000004	/* PMN1 overflow */
+#define	FLAG_PMN2_IF	0x00000008	/* PMN2 overflow */
+#define	FLAG_PMN3_IF	0x00000010	/* PMN3 overflow */
+
+#define EVTSEL_EVCNT_MASK 0x0000000ff	/* event to count for PMNs */
+#define PMNC_EVCNT0_SHIFT 0
+#define PMNC_EVCNT1_SHIFT 8
+#define PMNC_EVCNT2_SHIFT 16
+#define PMNC_EVCNT3_SHIFT 24
+
+/* 
+ * Queue Manager
+ */
+#define	IXP425_QMGR_HWBASE	0x60000000UL
+#define IXP425_QMGR_VBASE	(IXP425_PCI_VBASE + IXP425_PCI_SIZE)
+#define IXP425_QMGR_SIZE	0x4000
+
+/*
+ * Network Processing Engines (NPE's) and associated Ethernet MAC's.
+ */
+#define IXP425_NPE_A_HWBASE	(IXP425_IO_HWBASE + IXP425_NPE_A_OFFSET)
+#define IXP425_NPE_A_VBASE	(IXP425_IO_VBASE + IXP425_NPE_A_OFFSET)
+#define IXP425_NPE_A_SIZE	0x1000		/* Actually only 256 bytes */
+
+#define IXP425_NPE_B_HWBASE	(IXP425_IO_HWBASE + IXP425_NPE_B_OFFSET)
+#define IXP425_NPE_B_VBASE	(IXP425_IO_VBASE + IXP425_NPE_B_OFFSET)
+#define IXP425_NPE_B_SIZE	0x1000		/* Actually only 256 bytes */
+
+#define IXP425_NPE_C_HWBASE	(IXP425_IO_HWBASE + IXP425_NPE_C_OFFSET)
+#define IXP425_NPE_C_VBASE	(IXP425_IO_VBASE + IXP425_NPE_C_OFFSET)
+#define IXP425_NPE_C_SIZE	0x1000		/* Actually only 256 bytes */
+
+#define IXP425_MAC_A_HWBASE	(IXP425_IO_HWBASE + IXP425_MAC_A_OFFSET)
+#define IXP425_MAC_A_VBASE	(IXP425_IO_VBASE + IXP425_MAC_A_OFFSET)
+#define IXP425_MAC_A_SIZE	0x1000		/* Actually only 256 bytes */
+
+#define IXP425_MAC_B_HWBASE	(IXP425_IO_HWBASE + IXP425_MAC_B_OFFSET)
+#define IXP425_MAC_B_VBASE	(IXP425_IO_VBASE + IXP425_MAC_B_OFFSET)
+#define IXP425_MAC_B_SIZE	0x1000 		/* Actually only 256 bytes */
+
+/*
+ * Expansion Bus Data Space.
+ */
+#define	IXP425_EXP_BUS_HWBASE	0x50000000UL
+#define	IXP425_EXP_BUS_SIZE	0x01000000	/* max, typically smaller */
+
+#define	IXP425_EXP_BUS_CSx_HWBASE(i) \
+	(IXP425_EXP_BUS_HWBASE + (i)*IXP425_EXP_BUS_SIZE)
+
+#define	IXP425_EXP_BUS_CS1_HWBASE	IXP425_EXP_BUS_CSx_HWBASE(1)
+#define IXP425_EXP_BUS_CS1_VBASE	(IXP425_MAC_B_VBASE + IXP425_MAC_B_SIZE)
+#define IXP425_EXP_BUS_CS1_SIZE		0x1000
+
+/* NB: not mapped (yet) */
+#define	IXP425_EXP_BUS_CS0_HWBASE	IXP425_EXP_BUS_CSx_HWBASE(0)
+#define	IXP425_EXP_BUS_CS2_HWBASE	IXP425_EXP_BUS_CSx_HWBASE(2)
+#define	IXP425_EXP_BUS_CS3_HWBASE	IXP425_EXP_BUS_CSx_HWBASE(3)
+#define	IXP425_EXP_BUS_CS4_HWBASE	IXP425_EXP_BUS_CSx_HWBASE(4)
+#define	IXP425_EXP_BUS_CS5_HWBASE	IXP425_EXP_BUS_CSx_HWBASE(5)
+#define	IXP425_EXP_BUS_CS6_HWBASE	IXP425_EXP_BUS_CSx_HWBASE(6)
+#define	IXP425_EXP_BUS_CS7_HWBASE	IXP425_EXP_BUS_CSx_HWBASE(7)
+
+#endif /* _IXP425REG_H_ */
diff --git a/sys/arm/xscale/ixp425/ixp425var.h b/sys/arm/xscale/ixp425/ixp425var.h
new file mode 100644
index 000000000000..91a163cd72f1
--- /dev/null
+++ b/sys/arm/xscale/ixp425/ixp425var.h
@@ -0,0 +1,99 @@
+/*	$NetBSD: ixp425var.h,v 1.10 2006/04/10 03:36:03 simonb Exp $ */
+
+/*
+ * Copyright (c) 2003
+ *	Ichiro FUKUHARA <ichiro@ichiro.org>.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by Ichiro FUKUHARA.
+ * 4. The name of the company nor the name of the author may be used to
+ *    endorse or promote products derived from this software without specific
+ *    prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ *
+ */
+
+#ifndef _IXP425VAR_H_
+#define _IXP425VAR_H_
+
+#include <sys/conf.h>
+#include <sys/queue.h>
+
+#include <machine/bus.h>
+
+#include <dev/pci/pcivar.h>
+#include <sys/rman.h>
+
+struct ixp425_softc {
+	device_t sc_dev;
+	bus_space_tag_t sc_iot;
+	bus_space_handle_t sc_gpio_ioh;
+	bus_space_handle_t sc_exp_ioh;
+
+	u_int32_t sc_intrmask;
+
+	struct rman sc_irq_rman;
+	struct rman sc_mem_rman;
+};
+
+struct ixppcib_softc {
+	device_t                sc_dev;
+	
+	u_int                   sc_bus;
+	
+	struct resource         *sc_csr;
+	struct resource         *sc_mem;
+	
+	struct rman             sc_io_rman;
+	struct rman             sc_mem_rman;
+	struct rman             sc_irq_rman;
+	
+	struct bus_space        sc_pci_memt;
+	struct bus_space        sc_pci_iot;
+};
+
+#define EXP_BUS_WRITE_4(sc, reg, data) \
+	bus_space_write_4(sc->sc_iot, sc->sc_exp_ioh, reg, data)
+#define EXP_BUS_READ_4(sc, reg) \
+	bus_space_read_4(sc->sc_iot, sc->sc_exp_ioh, reg)
+
+#define	GPIO_CONF_WRITE_4(sc, reg, data)	\
+	bus_space_write_4(sc->sc_iot, sc->sc_gpio_ioh, reg, data)
+#define	GPIO_CONF_READ_4(sc, reg) \
+	bus_space_read_4(sc->sc_iot, sc->sc_gpio_ioh, reg)
+
+extern struct bus_space ixp425_bs_tag;
+extern struct bus_space ixp425_a4x_bs_tag;
+
+void	ixp425_io_bs_init(bus_space_tag_t, void *);
+void	ixp425_mem_bs_init(bus_space_tag_t, void *);
+
+uint32_t ixp425_sdram_size(void);
+
+int	ixp425_md_route_interrupt(device_t, device_t, int);
+void	ixp425_md_attach(device_t);
+
+#endif /* _IXP425VAR_H_ */
diff --git a/sys/arm/xscale/ixp425/std.avila b/sys/arm/xscale/ixp425/std.avila
new file mode 100644
index 000000000000..b69a65ebfa49
--- /dev/null
+++ b/sys/arm/xscale/ixp425/std.avila
@@ -0,0 +1,6 @@
+#GW2348-4 board configuration
+#$FreeBSD$
+include		"../xscale/ixp425/std.ixp425"
+files		"../xscale/ixp425/files.avila"
+makeoptions	KERNPHYSADDR=0x10200000
+makeoptions	KERNVIRTADDR=0xc0200000
diff --git a/sys/arm/xscale/ixp425/std.ixp425 b/sys/arm/xscale/ixp425/std.ixp425
new file mode 100644
index 000000000000..69cc2a148965
--- /dev/null
+++ b/sys/arm/xscale/ixp425/std.ixp425
@@ -0,0 +1,6 @@
+#XScale IXP425 generic configuration
+#$FreeBSD$
+files		"../xscale/ixp425/files.ixp425"
+include		"../xscale/std.xscale"
+cpu 		CPU_XSCALE_IXP425
+makeoption	ARM_BIG_ENDIAN
diff --git a/sys/arm/xscale/ixp425/uart_bus_ixp425.c b/sys/arm/xscale/ixp425/uart_bus_ixp425.c
new file mode 100644
index 000000000000..a27557afbd98
--- /dev/null
+++ b/sys/arm/xscale/ixp425/uart_bus_ixp425.c
@@ -0,0 +1,91 @@
+/*-
+ * Copyright (c) 2006 Kevin Lo.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/conf.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <machine/bus.h>
+#include <sys/rman.h>
+#include <machine/resource.h>
+
+#include <dev/pci/pcivar.h>
+#include <dev/ic/ns16550.h>
+
+#include <dev/uart/uart.h>
+#include <dev/uart/uart_bus.h>
+#include <dev/uart/uart_cpu.h>
+
+#include <arm/xscale/ixp425/ixp425reg.h>
+#include <arm/xscale/ixp425/ixp425var.h>
+
+#include "uart_if.h"
+
+static int uart_ixp425_probe(device_t dev);
+
+static device_method_t uart_ixp425_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_probe,		uart_ixp425_probe),
+	DEVMETHOD(device_attach,	uart_bus_attach),
+	DEVMETHOD(device_detach,	uart_bus_detach),
+	{ 0, 0 }
+};
+
+static driver_t uart_ixp425_driver = {
+	uart_driver_name,
+	uart_ixp425_methods,
+	sizeof(struct uart_softc),
+};
+
+extern SLIST_HEAD(uart_devinfo_list, uart_devinfo) uart_sysdevs;
+static int
+uart_ixp425_probe(device_t dev)
+{
+	struct uart_softc *sc;
+
+	sc = device_get_softc(dev);
+	sc->sc_sysdev = SLIST_FIRST(&uart_sysdevs);
+	sc->sc_class = &uart_ns8250_class;
+	bcopy(&sc->sc_sysdev->bas, &sc->sc_bas, sizeof(sc->sc_bas));
+	/*
+	 * XXX set UART Unit Enable (0x40) AND
+	 *     receiver timeout int enable (0x10).
+	 * The first turns on the UART.  The second is necessary to get
+	 * interrupts when the FIFO has data but is not full.  Note that
+	 * uart_ns8250 carefully avoids touching these bits so we can
+	 * just set them here and proceed.  But this is fragile...
+	 */
+	bus_space_write_4(&ixp425_a4x_bs_tag,
+	    device_get_unit(dev) == 0 ? IXP425_UART0_VBASE : IXP425_UART1_VBASE,
+	    IXP425_UART_IER, IXP425_UART_IER_UUE | IXP425_UART_IER_RTOIE);
+	return(uart_bus_probe(dev, 0, IXP425_UART_FREQ, 0, 0));
+}
+
+
+DRIVER_MODULE(uart, ixp, uart_ixp425_driver, uart_devclass, 0, 0);
diff --git a/sys/arm/xscale/ixp425/uart_cpu_ixp425.c b/sys/arm/xscale/ixp425/uart_cpu_ixp425.c
new file mode 100644
index 000000000000..e691968538c6
--- /dev/null
+++ b/sys/arm/xscale/ixp425/uart_cpu_ixp425.c
@@ -0,0 +1,67 @@
+/*-
+ * Copyright (c) 2003 Marcel Moolenaar
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/cons.h>
+#include <machine/bus.h>
+
+#include <dev/uart/uart.h>
+#include <dev/uart/uart_cpu.h>
+
+#include <arm/xscale/ixp425/ixp425reg.h>
+#include <arm/xscale/ixp425/ixp425var.h>
+
+bus_space_tag_t uart_bus_space_io;
+bus_space_tag_t uart_bus_space_mem;
+
+int
+uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
+{
+	return ((b1->bsh == b2->bsh && b1->bst == b2->bst) ? 1 : 0);
+}
+
+int
+uart_cpu_getdev(int devtype, struct uart_devinfo *di)
+{
+	di->ops = uart_ns8250_ops;
+	di->bas.chan = 0;
+	di->bas.bst = &ixp425_a4x_bs_tag;
+	di->bas.regshft = 0;
+	di->bas.rclk = IXP425_UART_FREQ;
+	di->baudrate = 115200;
+	di->databits = 8;
+	di->stopbits = 1;
+	di->parity = UART_PARITY_NONE;
+	uart_bus_space_io = &ixp425_a4x_bs_tag;
+	uart_bus_space_mem = NULL;
+	di->bas.bsh = IXP425_UART0_VBASE;
+	return (0);
+}