diff options
Diffstat (limited to 'sys/powerpc/ps3/ps3pic.c')
| -rw-r--r-- | sys/powerpc/ps3/ps3pic.c | 246 |
1 files changed, 246 insertions, 0 deletions
diff --git a/sys/powerpc/ps3/ps3pic.c b/sys/powerpc/ps3/ps3pic.c new file mode 100644 index 000000000000..5463f6a6e3b6 --- /dev/null +++ b/sys/powerpc/ps3/ps3pic.c @@ -0,0 +1,246 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright 2010 Nathan Whitehorn + * + * 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/param.h> +#include <sys/systm.h> +#include <sys/module.h> +#include <sys/bus.h> +#include <sys/conf.h> +#include <sys/kernel.h> +#include <sys/malloc.h> + +#include <vm/vm.h> +#include <vm/pmap.h> + +#include <machine/bus.h> +#include <machine/intr_machdep.h> +#include <machine/md_var.h> +#include <machine/platform.h> + +#include "ps3-hvcall.h" +#include "pic_if.h" + +static void ps3pic_identify(driver_t *driver, device_t parent); +static int ps3pic_probe(device_t); +static int ps3pic_attach(device_t); + +static void ps3pic_dispatch(device_t, struct trapframe *); +static void ps3pic_enable(device_t, u_int, u_int, void **); +static void ps3pic_eoi(device_t, u_int, void *); +static void ps3pic_ipi(device_t, u_int); +static void ps3pic_mask(device_t, u_int, void *); +static void ps3pic_unmask(device_t, u_int, void *); + +struct ps3pic_softc { + volatile uint64_t *bitmap_thread0; + volatile uint64_t *mask_thread0; + volatile uint64_t *bitmap_thread1; + volatile uint64_t *mask_thread1; + + uint64_t sc_ipi_outlet[2]; + uint64_t sc_ipi_virq; + int sc_vector[64]; +}; + +static device_method_t ps3pic_methods[] = { + /* Device interface */ + DEVMETHOD(device_identify, ps3pic_identify), + DEVMETHOD(device_probe, ps3pic_probe), + DEVMETHOD(device_attach, ps3pic_attach), + + /* PIC interface */ + DEVMETHOD(pic_dispatch, ps3pic_dispatch), + DEVMETHOD(pic_enable, ps3pic_enable), + DEVMETHOD(pic_eoi, ps3pic_eoi), + DEVMETHOD(pic_ipi, ps3pic_ipi), + DEVMETHOD(pic_mask, ps3pic_mask), + DEVMETHOD(pic_unmask, ps3pic_unmask), + + { 0, 0 }, +}; + +static driver_t ps3pic_driver = { + "ps3pic", + ps3pic_methods, + sizeof(struct ps3pic_softc) +}; + +DRIVER_MODULE(ps3pic, nexus, ps3pic_driver, 0, 0); + +static MALLOC_DEFINE(M_PS3PIC, "ps3pic", "PS3 PIC"); + +static void +ps3pic_identify(driver_t *driver, device_t parent) +{ + if (strcmp(installed_platform(), "ps3") != 0) + return; + + if (device_find_child(parent, "ps3pic", DEVICE_UNIT_ANY) == NULL) + BUS_ADD_CHILD(parent, 0, "ps3pic", 0); +} + +static int +ps3pic_probe(device_t dev) +{ + device_set_desc(dev, "Playstation 3 interrupt controller"); + return (BUS_PROBE_NOWILDCARD); +} + +static int +ps3pic_attach(device_t dev) +{ + struct ps3pic_softc *sc; + uint64_t ppe; + int thread; + + sc = device_get_softc(dev); + + sc->bitmap_thread0 = contigmalloc(128 /* 512 bits * 2 */, M_PS3PIC, + M_NOWAIT | M_ZERO, 0, BUS_SPACE_MAXADDR, 64 /* alignment */, + PAGE_SIZE /* boundary */); + sc->mask_thread0 = sc->bitmap_thread0 + 4; + sc->bitmap_thread1 = sc->bitmap_thread0 + 8; + sc->mask_thread1 = sc->bitmap_thread0 + 12; + + lv1_get_logical_ppe_id(&ppe); + thread = 32 - fls(mfctrl()); + lv1_configure_irq_state_bitmap(ppe, thread, + vtophys(sc->bitmap_thread0)); + + sc->sc_ipi_virq = 63; + +#ifdef SMP + lv1_configure_irq_state_bitmap(ppe, !thread, + vtophys(sc->bitmap_thread1)); + + /* Map both IPIs to the same VIRQ to avoid changes in intr_machdep */ + lv1_construct_event_receive_port(&sc->sc_ipi_outlet[0]); + lv1_connect_irq_plug_ext(ppe, thread, sc->sc_ipi_virq, + sc->sc_ipi_outlet[0], 0); + lv1_construct_event_receive_port(&sc->sc_ipi_outlet[1]); + lv1_connect_irq_plug_ext(ppe, !thread, sc->sc_ipi_virq, + sc->sc_ipi_outlet[1], 0); +#endif + + powerpc_register_pic(dev, 0, sc->sc_ipi_virq, 1, FALSE); + return (0); +} + +/* + * PIC I/F methods. + */ + +static void +ps3pic_dispatch(device_t dev, struct trapframe *tf) +{ + uint64_t bitmap, mask; + int irq; + struct ps3pic_softc *sc; + + sc = device_get_softc(dev); + + if (PCPU_GET(cpuid) == 0) { + bitmap = atomic_readandclear_64(&sc->bitmap_thread0[0]); + mask = sc->mask_thread0[0]; + } else { + bitmap = atomic_readandclear_64(&sc->bitmap_thread1[0]); + mask = sc->mask_thread1[0]; + } + powerpc_sync(); + + while ((irq = ffsl(bitmap & mask) - 1) != -1) { + bitmap &= ~(1UL << irq); + powerpc_dispatch_intr(sc->sc_vector[63 - irq], tf); + } +} + +static void +ps3pic_enable(device_t dev, u_int irq, u_int vector, void **priv) +{ + struct ps3pic_softc *sc; + + sc = device_get_softc(dev); + sc->sc_vector[irq] = vector; + + ps3pic_unmask(dev, irq, priv); +} + +static void +ps3pic_eoi(device_t dev, u_int irq, void *priv) +{ + uint64_t ppe; + int thread; + + lv1_get_logical_ppe_id(&ppe); + thread = 32 - fls(mfctrl()); + + lv1_end_of_interrupt_ext(ppe, thread, irq); +} + +static void +ps3pic_ipi(device_t dev, u_int cpu) +{ + struct ps3pic_softc *sc; + sc = device_get_softc(dev); + + lv1_send_event_locally(sc->sc_ipi_outlet[cpu]); +} + +static void +ps3pic_mask(device_t dev, u_int irq, void *priv) +{ + struct ps3pic_softc *sc; + uint64_t ppe; + + sc = device_get_softc(dev); + + /* Do not mask IPIs! */ + if (irq == sc->sc_ipi_virq) + return; + + atomic_clear_64(&sc->mask_thread0[0], 1UL << (63 - irq)); + atomic_clear_64(&sc->mask_thread1[0], 1UL << (63 - irq)); + + lv1_get_logical_ppe_id(&ppe); + lv1_did_update_interrupt_mask(ppe, 0); + lv1_did_update_interrupt_mask(ppe, 1); +} + +static void +ps3pic_unmask(device_t dev, u_int irq, void *priv) +{ + struct ps3pic_softc *sc; + uint64_t ppe; + + sc = device_get_softc(dev); + atomic_set_64(&sc->mask_thread0[0], 1UL << (63 - irq)); + atomic_set_64(&sc->mask_thread1[0], 1UL << (63 - irq)); + + lv1_get_logical_ppe_id(&ppe); + lv1_did_update_interrupt_mask(ppe, 0); + lv1_did_update_interrupt_mask(ppe, 1); +} |