summaryrefslogtreecommitdiff
path: root/sys/boot/i386/libi386/biospnp.c
diff options
context:
space:
mode:
Diffstat (limited to 'sys/boot/i386/libi386/biospnp.c')
-rw-r--r--sys/boot/i386/libi386/biospnp.c289
1 files changed, 0 insertions, 289 deletions
diff --git a/sys/boot/i386/libi386/biospnp.c b/sys/boot/i386/libi386/biospnp.c
deleted file mode 100644
index a6064ba27462c..0000000000000
--- a/sys/boot/i386/libi386/biospnp.c
+++ /dev/null
@@ -1,289 +0,0 @@
-/*-
- * Copyright (c) 1998 Michael Smith <msmith@freebsd.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.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
- *
- * $Id: biospnp.c,v 1.2 1998/10/23 22:29:08 msmith Exp $
- */
-
-/*
- * PnP BIOS enumerator.
- */
-
-#include <stand.h>
-#include <string.h>
-#include <machine/stdarg.h>
-#include <bootstrap.h>
-#include <isapnp.h>
-#include <btxv86.h>
-
-
-static int biospnp_init(void);
-static void biospnp_enumerate(void);
-
-struct pnphandler biospnphandler =
-{
- "PnP BIOS",
- biospnp_enumerate
-};
-
-struct pnp_ICstructure
-{
- u_int8_t pnp_signature[4] __attribute__ ((packed));
- u_int8_t pnp_version __attribute__ ((packed));
- u_int8_t pnp_length __attribute__ ((packed));
- u_int16_t pnp_BIOScontrol __attribute__ ((packed));
- u_int8_t pnp_checksum __attribute__ ((packed));
- u_int32_t pnp_eventflag __attribute__ ((packed));
- u_int16_t pnp_rmip __attribute__ ((packed));
- u_int16_t pnp_rmcs __attribute__ ((packed));
- u_int16_t pnp_pmip __attribute__ ((packed));
- u_int32_t pnp_pmcs __attribute__ ((packed));
- u_int8_t pnp_OEMdev[4] __attribute__ ((packed));
- u_int16_t pnp_rmds __attribute__ ((packed));
- u_int32_t pnp_pmds __attribute__ ((packed));
-};
-
-struct pnp_devNode
-{
- u_int16_t dn_size __attribute__ ((packed));
- u_int8_t dn_handle __attribute__ ((packed));
- u_int8_t dn_id[4] __attribute__ ((packed));
- u_int8_t dn_type[3] __attribute__ ((packed));
- u_int16_t dn_attrib __attribute__ ((packed));
- u_int8_t dn_data[0] __attribute__ ((packed));
-};
-
-struct pnp_isaConfiguration
-{
- u_int8_t ic_revision __attribute__ ((packed));
- u_int8_t ic_nCSN __attribute__ ((packed));
- u_int16_t ic_rdport __attribute__ ((packed));
- u_int16_t ic_reserved __attribute__ ((packed));
-};
-
-static struct pnp_ICstructure *pnp_Icheck = NULL;
-static u_int16_t pnp_NumNodes;
-static u_int16_t pnp_NodeSize;
-
-static void biospnp_scanresdata(struct pnpinfo *pi, struct pnp_devNode *dn);
-static int biospnp_call(int func, char *fmt, ...);
-
-#define vsegofs(vptr) (((u_int32_t)VTOPSEG(vptr) << 16) + VTOPOFF(vptr))
-void (* v86bios)(u_int32_t arg0, u_int32_t arg1, u_int32_t arg2, u_int32_t arg3) = (void *)v86int;
-
-#define biospnp_f00(NumNodes, NodeSize) biospnp_call(0x00, "ll", NumNodes, NodeSize)
-#define biospnp_f01(Node, devNodeBuffer, Control) biospnp_call(0x01, "llw", Node, devNodeBuffer, Control)
-#define biospnp_f40(Configuration) biospnp_call(0x40, "l", Configuration)
-
-/* PnP BIOS return codes */
-#define PNP_SUCCESS 0x00
-#define PNP_FUNCTION_NOT_SUPPORTED 0x80
-
-/*
- * Initialisation: locate the PnP BIOS, test that we can call it.
- * Returns nonzero if the PnP BIOS is not usable on this system.
- */
-static int
-biospnp_init(void)
-{
- struct pnp_isaConfiguration icfg;
- char *sigptr;
- int result;
-
- /* Search for the $PnP signature */
- pnp_Icheck = NULL;
- for (sigptr = PTOV(0xf0000); sigptr < PTOV(0xfffff); sigptr += 16)
- if (!bcmp(sigptr, "$PnP", 4)) {
- pnp_Icheck = (struct pnp_ICstructure *)sigptr;
- break;
- }
-
- /* No signature, no BIOS */
- if (pnp_Icheck == NULL)
- return(1);
-
- /*
- * Fetch the system table parameters as a test of the BIOS
- */
- result = biospnp_f00(vsegofs(&pnp_NumNodes), vsegofs(&pnp_NodeSize));
- if (result != PNP_SUCCESS) {
- return(1);
- }
-
- /*
- * Look for the PnP ISA configuration table
- */
- result = biospnp_f40(vsegofs(&icfg));
- switch (result) {
- case PNP_SUCCESS:
- /* If the BIOS found some PnP devices, take its hint for the read port */
- if ((icfg.ic_revision == 1) && (icfg.ic_nCSN > 0))
- isapnp_readport = icfg.ic_rdport;
- break;
- case PNP_FUNCTION_NOT_SUPPORTED:
- /* The BIOS says there is no ISA bus (should we trust that this works?) */
- printf("PnP BIOS claims no ISA bus\n");
- isapnp_readport = -1;
- break;
- }
- return(0);
-}
-
-static void
-biospnp_enumerate(void)
-{
- u_int8_t Node;
- struct pnp_devNode *devNodeBuffer;
- int result;
- struct pnpinfo *pi;
- int count;
-
- /* Init/check state */
- if (biospnp_init())
- return;
-
- devNodeBuffer = (struct pnp_devNode *)malloc(pnp_NodeSize);
- Node = 0;
- count = 1000;
- while((Node != 0xff) && (count-- > 0)) {
- result = biospnp_f01(vsegofs(&Node), vsegofs(devNodeBuffer), 0x1);
- if (result != PNP_SUCCESS) {
- printf("PnP BIOS node %d: error 0x%x\n", Node, result);
- } else {
- pi = pnp_allocinfo();
- pnp_addident(pi, pnp_eisaformat(devNodeBuffer->dn_id));
- biospnp_scanresdata(pi, devNodeBuffer);
- pnp_addinfo(pi);
- }
- }
-}
-
-/*
- * Scan the resource data in the node's data area for compatible device IDs
- * and descriptions.
- */
-static void
-biospnp_scanresdata(struct pnpinfo *pi, struct pnp_devNode *dn)
-{
- int tag, i, rlen, dlen;
- u_int8_t *p;
- char *str;
-
- p = dn->dn_data; /* point to resource data */
- dlen = dn->dn_size - (p - (u_int8_t *)dn); /* length of resource data */
-
- for (i = 0; i < dlen; i+= rlen) {
- tag = p[i];
- i++;
- if (PNP_RES_TYPE(tag) == 0) {
- rlen = PNP_SRES_LEN(tag);
- /* small resource */
- switch (PNP_SRES_NUM(tag)) {
-
- case COMP_DEVICE_ID:
- /* got a compatible device ID */
- pnp_addident(pi, pnp_eisaformat(p + i));
- break;
-
- case END_TAG:
- return;
- }
- } else {
- /* large resource */
- rlen = *(u_int16_t *)(p + i);
- i += sizeof(u_int16_t);
-
- switch(PNP_LRES_NUM(tag)) {
-
- case ID_STRING_ANSI:
- str = malloc(rlen + 1);
- bcopy(p + i, str, rlen);
- str[rlen] = 0;
- if (pi->pi_desc == NULL) {
- pi->pi_desc = str;
- } else {
- free(str);
- }
- break;
- }
- }
- }
-}
-
-
-/*
- * Make a 16-bit realmode PnP BIOS call.
- *
- * The first argument passed is the function number, the last is the
- * BIOS data segment selector. Intermediate arguments may be 16 or
- * 32 bytes in length, and are described by the format string.
- *
- * Arguments to the BIOS functions must be packed on the stack, hence
- * this evil.
- */
-static int
-biospnp_call(int func, char *fmt, ...)
-{
- va_list ap;
- char *p;
- u_int8_t *argp;
- u_int32_t args[4];
- u_int32_t i;
-
- /* function number first */
- argp = (u_int8_t *)args;
- *(u_int16_t *)argp = func;
- argp += sizeof(u_int16_t);
-
- /* take args according to format */
- va_start(ap, fmt);
- for (p = fmt; *p != 0; p++) {
- switch(*p) {
-
- case 'w':
- i = va_arg(ap, u_int16_t);
- *(u_int16_t *)argp = i;
- argp += sizeof(u_int16_t);
- break;
-
- case 'l':
- i = va_arg(ap, u_int32_t);
- *(u_int32_t *)argp = i;
- argp += sizeof(u_int32_t);
- break;
- }
- }
-
- /* BIOS segment last */
- *(u_int16_t *)argp = pnp_Icheck->pnp_rmds;
- argp += sizeof(u_int16_t);
-
- /* prepare for call */
- v86.ctl = V86_ADDR | V86_CALLF;
- v86.addr = ((u_int32_t)pnp_Icheck->pnp_rmcs << 16) + pnp_Icheck->pnp_rmip;
-
- /* call with packed stack and return */
- v86bios(args[0], args[1], args[2], args[3]);
- return(v86.eax & 0xffff);
-}
generated by cgit v1.2.3 (git 2.25.1) at 2025-06-14 16:11:02 +0000