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/* $OpenBSD: bios.c,v 1.57 2005/11/13 14:23:26 martin Exp $ */
/*
* Copyright (c) 1997-2001 Michael Shalayeff
* 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 OR HIS RELATIVES 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 MIND, 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.
*/
/* #define BIOS_DEBUG */
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/errno.h>
#include <sys/proc.h>
#include <sys/malloc.h>
#include <sys/reboot.h>
#include <sys/extent.h>
#include <uvm/uvm_extern.h>
#include <sys/sysctl.h>
#include <dev/cons.h>
#include <stand/boot/bootarg.h>
#include <machine/cpu.h>
#include <machine/pio.h>
#include <machine/cpufunc.h>
#include <machine/conf.h>
#include <machine/gdt.h>
#include <machine/pcb.h>
#include <machine/biosvar.h>
#include <machine/apmvar.h>
#include <dev/isa/isareg.h>
#include <i386/isa/isa_machdep.h>
#include "apm.h"
#include "pcibios.h"
#include "pci.h"
struct bios_softc {
struct device sc_dev;
};
int biosprobe(struct device *, void *, void *);
void biosattach(struct device *, struct device *, void *);
int bios_print(void *, const char *);
struct cfattach bios_ca = {
sizeof(struct bios_softc), biosprobe, biosattach
};
struct cfdriver bios_cd = {
NULL, "bios", DV_DULL
};
extern dev_t bootdev;
#if NAPM > 0 || defined(DEBUG)
bios_apminfo_t *apm;
#endif
#if NPCI > 0
bios_pciinfo_t *bios_pciinfo;
#endif
bios_diskinfo_t *bios_diskinfo;
bios_memmap_t *bios_memmap;
u_int32_t bios_cksumlen;
struct bios32_entry bios32_entry;
#ifdef MULTIPROCESSOR
void *bios_smpinfo;
#endif
bios_diskinfo_t *bios_getdiskinfo(dev_t);
int
biosprobe(parent, match, aux)
struct device *parent;
void *match, *aux;
{
struct bios_attach_args *bia = aux;
#ifdef BIOS_DEBUG
printf("%s%d: boot API ver %x, %x; args %p[%d]\n",
bia->bios_dev, bios_cd.cd_ndevs,
bootapiver, BOOTARG_APIVER, bootargp, bootargc);
#endif
/* there could be only one */
if (bios_cd.cd_ndevs || strcmp(bia->bios_dev, bios_cd.cd_name))
return 0;
if (!(bootapiver & BAPIV_VECTOR) || bootargp == NULL)
return 0;
return 1;
}
void
biosattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct bios_softc *sc = (struct bios_softc *) self;
#if (NPCI > 0 && NPCIBIOS > 0) || NAPM > 0
struct bios_attach_args *bia = aux;
#endif
volatile u_int8_t *va;
char *str;
int flags;
/* remember flags */
flags = sc->sc_dev.dv_cfdata->cf_flags;
va = ISA_HOLE_VADDR(0xffff0);
switch (va[14]) {
default:
case 0xff: str = "PC"; break;
case 0xfe: str = "PC/XT"; break;
case 0xfd: str = "PCjr"; break;
case 0xfc: str = "AT/286+"; break;
case 0xfb: str = "PC/XT+"; break;
case 0xfa: str = "PS/2 25/30"; break;
case 0xf9: str = "PC Convertible";break;
case 0xf8: str = "PS/2 386+"; break;
}
printf(": %s(%02x) BIOS, date %c%c/%c%c/%c%c",
str, va[15], va[5], va[6], va[8], va[9], va[11], va[12]);
/* see if we have BIOS32 extensions */
if (!(flags & BIOSF_BIOS32)) {
for (va = ISA_HOLE_VADDR(BIOS32_START);
va < (u_int8_t *)ISA_HOLE_VADDR(BIOS32_END); va += 16) {
bios32_header_t h = (bios32_header_t)va;
u_int8_t cksum;
int i;
if (h->signature != BIOS32_SIGNATURE)
continue;
/* verify checksum */
for (cksum = 0, i = h->length * 16; i--; cksum += va[i])
;
if (cksum != 0)
continue;
if (h->entry <= BIOS32_START || h->entry >= BIOS32_END)
continue;
bios32_entry.segment = GSEL(GCODE_SEL, SEL_KPL);
bios32_entry.offset = (u_int32_t)ISA_HOLE_VADDR(h->entry);
printf(", BIOS32 rev. %d @ 0x%lx", h->rev, h->entry);
break;
}
}
printf("\n");
#if NAPM > 0
if (apm) {
struct bios_attach_args ba;
#if defined(DEBUG) || defined(APMDEBUG)
printf("apminfo: %x, code %x[%x]/%x[%x], data %x[%x], ept %x\n",
apm->apm_detail,
apm->apm_code32_base, apm->apm_code_len,
apm->apm_code16_base, apm->apm_code16_len,
apm->apm_data_base, apm->apm_data_len, apm->apm_entry);
#endif
ba.bios_dev = "apm";
ba.bios_func = 0x15;
ba.bios_memt = bia->bios_memt;
ba.bios_iot = bia->bios_iot;
ba.bios_apmp = apm;
config_found(self, &ba, bios_print);
}
#endif
#if NPCI > 0 && NPCIBIOS > 0
if (!(flags & BIOSF_PCIBIOS)) {
struct bios_attach_args ba;
ba.bios_dev = "pcibios";
ba.bios_func = 0x1A;
ba.bios_memt = bia->bios_memt;
ba.bios_iot = bia->bios_iot;
config_found(self, &ba, bios_print);
}
#endif
/*
* now, that we've gave 'em a chance to attach,
* scan and map all the proms we can find
*/
if (!(flags & BIOSF_PROMSCAN)) {
volatile u_int8_t *eva;
for (str = NULL, va = ISA_HOLE_VADDR(0xc0000),
eva = ISA_HOLE_VADDR(0xf0000);
va < eva; va += 512) {
extern struct extent *iomem_ex;
bios_romheader_t romh = (bios_romheader_t)va;
u_int32_t off, len;
u_int8_t cksum;
int i;
if (romh->signature != 0xaa55)
continue;
/*
* for this and the next check we probably want
* to reserve the page in the extent anyway
*/
if (!romh->len || romh->len == 0xff)
continue;
len = romh->len * 512;
if (va + len > eva)
continue;
for (cksum = 0, i = len; i--; cksum += va[i])
;
#ifdef __stinkpad_sucks__
if (cksum != 0)
continue;
#endif
off = 0xc0000 + (va - (u_int8_t *)
ISA_HOLE_VADDR(0xc0000));
if (!str)
printf("%s: ROM list:",
str = sc->sc_dev.dv_xname);
printf(" 0x%05x/0x%x%s", off, len,
cksum? "!" : "");
if ((i = extent_alloc_region(iomem_ex,
(paddr_t)off, len, EX_NOWAIT)))
printf(":%d", i);
va += len - 512;
}
}
if (str)
printf("\n");
}
void
bios_getopt()
{
bootarg_t *q;
#ifdef BIOS_DEBUG
printf("bootargv:");
#endif
for(q = bootargp; q->ba_type != BOOTARG_END; q = q->ba_next) {
q->ba_next = (bootarg_t *)((caddr_t)q + q->ba_size);
switch (q->ba_type) {
case BOOTARG_MEMMAP:
bios_memmap = (bios_memmap_t *)q->ba_arg;
#ifdef BIOS_DEBUG
printf(" memmap %p", bios_memmap);
#endif
break;
case BOOTARG_DISKINFO:
bios_diskinfo = (bios_diskinfo_t *)q->ba_arg;
#ifdef BIOS_DEBUG
printf(" diskinfo %p", bios_diskinfo);
#endif
break;
#if NAPM > 0 || defined(DEBUG)
case BOOTARG_APMINFO:
#ifdef BIOS_DEBUG
printf(" apminfo %p", q->ba_arg);
#endif
apm = (bios_apminfo_t *)q->ba_arg;
break;
#endif
case BOOTARG_CKSUMLEN:
bios_cksumlen = *(u_int32_t *)q->ba_arg;
#ifdef BIOS_DEBUG
printf(" cksumlen %d", bios_cksumlen);
#endif
break;
#if NPCI > 0
case BOOTARG_PCIINFO:
bios_pciinfo = (bios_pciinfo_t *)q->ba_arg;
#ifdef BIOS_DEBUG
printf(" pciinfo %p", bios_pciinfo);
#endif
break;
#endif
case BOOTARG_CONSDEV:
if (q->ba_size >= sizeof(bios_consdev_t))
{
bios_consdev_t *cdp = (bios_consdev_t*)q->ba_arg;
#include "com.h"
#include "pccom.h"
#if NCOM + NPCCOM > 0
extern int comdefaultrate; /* ic/com.c */
comdefaultrate = cdp->conspeed;
#endif
#ifdef BIOS_DEBUG
printf(" console 0x%x:%d",
cdp->consdev, cdp->conspeed);
#endif
cnset(cdp->consdev);
}
break;
#ifdef MULTIPROCESSOR
case BOOTARG_SMPINFO:
bios_smpinfo = q->ba_arg;
printf(" smpinfo %p", bios_smpinfo);
break;
#endif
default:
#ifdef BIOS_DEBUG
printf(" unsupported arg (%d) %p", q->ba_type,
q->ba_arg);
#endif
break;
}
}
printf("\n");
}
int
bios_print(aux, pnp)
void *aux;
const char *pnp;
{
struct bios_attach_args *ba = aux;
if (pnp)
printf("%s at %s function 0x%x",
ba->bios_dev, pnp, ba->bios_func);
return (UNCONF);
}
int
bios32_service(service, e, ei)
u_int32_t service;
bios32_entry_t e;
bios32_entry_info_t ei;
{
u_long pa, endpa;
vaddr_t va, sva;
u_int32_t base, count, off, ent;
int slot;
if (bios32_entry.offset == 0)
return 0;
base = 0;
__asm __volatile("lcall *(%4)"
: "+a" (service), "+b" (base), "=c" (count), "=d" (off)
: "D" (&bios32_entry)
: "%esi", "cc", "memory");
if (service & 0xff)
return 0; /* not found */
ent = base + off;
if (ent <= BIOS32_START || ent >= BIOS32_END)
return 0;
endpa = round_page(BIOS32_END);
sva = va = uvm_km_valloc(kernel_map, endpa);
if (va == 0)
return (0);
slot = gdt_get_slot();
setgdt(slot, (caddr_t)va, BIOS32_END, SDT_MEMERA, SEL_KPL, 1, 0);
for (pa = trunc_page(BIOS32_START),
va += trunc_page(BIOS32_START);
pa < endpa; pa += NBPG, va += NBPG) {
pmap_enter(pmap_kernel(), va, pa,
VM_PROT_READ | VM_PROT_WRITE,
VM_PROT_READ | VM_PROT_WRITE | PMAP_WIRED);
/* for all you, broken hearted */
if (pa >= trunc_page(base)) {
pmap_enter(pmap_kernel(), sva, pa,
VM_PROT_READ | VM_PROT_WRITE,
VM_PROT_READ | VM_PROT_WRITE | PMAP_WIRED);
sva += NBPG;
}
}
e->segment = GSEL(slot, SEL_KPL);
e->offset = (vaddr_t)ent;
ei->bei_base = base;
ei->bei_size = count;
ei->bei_entry = ent;
return 1;
}
int
biosopen(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
struct bios_softc *sc = bios_cd.cd_devs[0];
if (minor(dev))
return (ENXIO);
(void)sc;
return 0;
}
int
biosclose(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
struct bios_softc *sc = bios_cd.cd_devs[0];
if (minor(dev))
return (ENXIO);
(void)sc;
return 0;
}
int
biosioctl(dev, cmd, data, flag, p)
dev_t dev;
u_long cmd;
caddr_t data;
int flag;
struct proc *p;
{
struct bios_softc *sc = bios_cd.cd_devs[0];
if (minor(dev))
return (ENXIO);
switch (cmd) {
default:
return ENXIO;
}
(void)sc;
return 0;
}
void
bioscnprobe(cn)
struct consdev *cn;
{
#if 0
bios_init(I386_BUS_SPACE_MEM); /* XXX */
if (!bios_cd.cd_ndevs)
return;
if (0 && bios_call(BOOTC_CHECK, NULL))
return;
cn->cn_pri = CN_NORMAL;
cn->cn_dev = makedev(48, 0);
#endif
}
void
bioscninit(cn)
struct consdev *cn;
{
}
void
bioscnputc(dev, ch)
dev_t dev;
int ch;
{
}
int
bioscngetc(dev)
dev_t dev;
{
return -1;
}
void
bioscnpollc(dev, on)
dev_t dev;
int on;
{
}
int
bios_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p)
int *name;
u_int namelen;
void *oldp;
size_t *oldlenp;
void *newp;
size_t newlen;
struct proc *p;
{
bios_diskinfo_t *pdi;
int biosdev;
/* all sysctl names at this level except diskinfo are terminal */
if (namelen != 1 && name[0] != BIOS_DISKINFO)
return (ENOTDIR); /* overloaded */
if (!(bootapiver & BAPIV_VECTOR))
return EOPNOTSUPP;
switch (name[0]) {
case BIOS_DEV:
if ((pdi = bios_getdiskinfo(bootdev)) == NULL)
return ENXIO;
biosdev = pdi->bios_number;
return sysctl_rdint(oldp, oldlenp, newp, biosdev);
case BIOS_DISKINFO:
if (namelen != 2)
return ENOTDIR;
if ((pdi = bios_getdiskinfo(name[1])) == NULL)
return ENXIO;
return sysctl_rdstruct(oldp, oldlenp, newp, pdi, sizeof(*pdi));
case BIOS_CKSUMLEN:
return sysctl_rdint(oldp, oldlenp, newp, bios_cksumlen);
default:
return EOPNOTSUPP;
}
/* NOTREACHED */
}
bios_diskinfo_t *
bios_getdiskinfo(dev)
dev_t dev;
{
bios_diskinfo_t *pdi;
if (bios_diskinfo == NULL)
return NULL;
for (pdi = bios_diskinfo; pdi->bios_number != -1; pdi++) {
if ((dev & B_MAGICMASK) == B_DEVMAGIC) { /* search by bootdev */
if (pdi->bsd_dev == dev)
break;
} else {
if (pdi->bios_number == dev)
break;
}
}
if (pdi->bios_number == -1)
return NULL;
else
return pdi;
}
|