Severely strip down the repocopied i386/bios.c and bios.h files. It turns
out that bios_sigsearch() etc is useful for finding tables in roms.
This commit is contained in:
Peter Wemm
parent
6111dcd2ef
commit
c3277f936c
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=135689
@ -29,164 +29,19 @@
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__FBSDID("$FreeBSD$");
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/*
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* Code for dealing with the BIOS in x86 PC systems.
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* Subset of the i386 bios support code. We cannot make bios16 nor bios32
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* calls, so we can leave that out. However, searching for bios rom
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* signatures can be useful for locating tables, eg: powernow settings.
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*/
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#include "opt_isa.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <sys/pcpu.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <machine/md_var.h>
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#include <machine/segments.h>
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#include <machine/stdarg.h>
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#include <machine/vmparam.h>
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#include <machine/pc/bios.h>
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#ifdef DEV_ISA
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#include <isa/isavar.h>
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#include <isa/pnpreg.h>
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#include <isa/pnpvar.h>
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#endif
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#define BIOS_START 0xe0000
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#define BIOS_SIZE 0x20000
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/* exported lookup results */
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struct bios32_SDentry PCIbios;
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static struct PnPBIOS_table *PnPBIOStable;
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static u_int bios32_SDCI;
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/* start fairly early */
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static void bios32_init(void *junk);
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SYSINIT(bios32, SI_SUB_CPU, SI_ORDER_ANY, bios32_init, NULL);
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/*
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* bios32_init
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*
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* Locate various bios32 entities.
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*/
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static void
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bios32_init(void *junk)
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{
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u_long sigaddr;
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struct bios32_SDheader *sdh;
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struct PnPBIOS_table *pt;
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u_int8_t ck, *cv;
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int i;
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char *p;
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/*
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* BIOS32 Service Directory, PCI BIOS
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*/
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/* look for the signature */
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if ((sigaddr = bios_sigsearch(0, "_32_", 4, 16, 0)) != 0) {
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/* get a virtual pointer to the structure */
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sdh = (struct bios32_SDheader *)(uintptr_t)BIOS_PADDRTOVADDR(sigaddr);
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for (cv = (u_int8_t *)sdh, ck = 0, i = 0; i < (sdh->len * 16); i++) {
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ck += cv[i];
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}
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/* If checksum is OK, enable use of the entrypoint */
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if ((ck == 0) && (BIOS_START <= sdh->entry ) &&
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(sdh->entry < (BIOS_START + BIOS_SIZE))) {
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bios32_SDCI = BIOS_PADDRTOVADDR(sdh->entry);
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if (bootverbose) {
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printf("bios32: Found BIOS32 Service Directory header at %p\n", sdh);
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printf("bios32: Entry = 0x%x (%x) Rev = %d Len = %d\n",
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sdh->entry, bios32_SDCI, sdh->revision, sdh->len);
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}
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/* Allow user override of PCI BIOS search */
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if (((p = getenv("machdep.bios.pci")) == NULL) || strcmp(p, "disable")) {
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/* See if there's a PCI BIOS entrypoint here */
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PCIbios.ident.id = 0x49435024; /* PCI systems should have this */
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if (!bios32_SDlookup(&PCIbios) && bootverbose)
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printf("pcibios: PCI BIOS entry at 0x%x+0x%x\n", PCIbios.base, PCIbios.entry);
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}
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if (p != NULL)
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freeenv(p);
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} else {
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printf("bios32: Bad BIOS32 Service Directory\n");
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}
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}
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/*
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* PnP BIOS
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*
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* Allow user override of PnP BIOS search
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*/
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if ((((p = getenv("machdep.bios.pnp")) == NULL) || strcmp(p, "disable")) &&
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((sigaddr = bios_sigsearch(0, "$PnP", 4, 16, 0)) != 0)) {
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/* get a virtual pointer to the structure */
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pt = (struct PnPBIOS_table *)(uintptr_t)BIOS_PADDRTOVADDR(sigaddr);
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for (cv = (u_int8_t *)pt, ck = 0, i = 0; i < pt->len; i++) {
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ck += cv[i];
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}
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/* If checksum is OK, enable use of the entrypoint */
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if (ck == 0) {
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PnPBIOStable = pt;
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if (bootverbose) {
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printf("pnpbios: Found PnP BIOS data at %p\n", pt);
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printf("pnpbios: Entry = %x:%x Rev = %d.%d\n",
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pt->pmentrybase, pt->pmentryoffset, pt->version >> 4, pt->version & 0xf);
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if ((pt->control & 0x3) == 0x01)
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printf("pnpbios: Event flag at %x\n", pt->evflagaddr);
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if (pt->oemdevid != 0)
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printf("pnpbios: OEM ID %x\n", pt->oemdevid);
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}
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} else {
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printf("pnpbios: Bad PnP BIOS data checksum\n");
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}
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}
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if (p != NULL)
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freeenv(p);
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if (bootverbose) {
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/* look for other know signatures */
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printf("Other BIOS signatures found:\n");
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}
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}
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/*
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* bios32_SDlookup
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*
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* Query the BIOS32 Service Directory for the service named in (ent),
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* returns nonzero if the lookup fails. The caller must fill in
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* (ent->ident), the remainder are populated on a successful lookup.
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*/
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int
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bios32_SDlookup(struct bios32_SDentry *ent)
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{
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struct bios_regs args;
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if (bios32_SDCI == 0)
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return (1);
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args.eax = ent->ident.id; /* set up arguments */
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args.ebx = args.ecx = args.edx = 0;
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bios32(&args, bios32_SDCI, GSEL(GCODE_SEL, SEL_KPL));
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if ((args.eax & 0xff) == 0) { /* success? */
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ent->base = args.ebx;
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ent->len = args.ecx;
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ent->entry = args.edx;
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ent->ventry = BIOS_PADDRTOVADDR(ent->base + ent->entry);
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return (0); /* all OK */
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}
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return (1); /* failed */
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}
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/*
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* bios_sigsearch
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*
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@ -236,245 +91,6 @@ bios_sigsearch(u_int32_t start, u_char *sig, int siglen, int paralen, int sigofs
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return(0);
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}
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/*
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* do not staticize, used by bioscall.s
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*/
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union {
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struct {
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u_short offset;
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u_short segment;
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} vec16;
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struct {
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u_int offset;
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u_short segment;
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} vec32;
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} bioscall_vector; /* bios jump vector */
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void
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set_bios_selectors(struct bios_segments *seg, int flags)
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{
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struct soft_segment_descriptor ssd = {
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0, /* segment base address (overwritten) */
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0, /* length (overwritten) */
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SDT_MEMERA, /* segment type (overwritten) */
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0, /* priority level */
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1, /* descriptor present */
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0, 0,
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1, /* descriptor size (overwritten) */
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0 /* granularity == byte units */
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};
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union descriptor *p_gdt;
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#ifdef SMP
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p_gdt = &gdt[PCPU_GET(cpuid) * NGDT];
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#else
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p_gdt = gdt;
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#endif
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ssd.ssd_base = seg->code32.base;
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ssd.ssd_limit = seg->code32.limit;
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ssdtosd(&ssd, &p_gdt[GBIOSCODE32_SEL].sd);
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ssd.ssd_def32 = 0;
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if (flags & BIOSCODE_FLAG) {
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ssd.ssd_base = seg->code16.base;
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ssd.ssd_limit = seg->code16.limit;
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ssdtosd(&ssd, &p_gdt[GBIOSCODE16_SEL].sd);
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}
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ssd.ssd_type = SDT_MEMRWA;
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if (flags & BIOSDATA_FLAG) {
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ssd.ssd_base = seg->data.base;
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ssd.ssd_limit = seg->data.limit;
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ssdtosd(&ssd, &p_gdt[GBIOSDATA_SEL].sd);
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}
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if (flags & BIOSUTIL_FLAG) {
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ssd.ssd_base = seg->util.base;
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ssd.ssd_limit = seg->util.limit;
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ssdtosd(&ssd, &p_gdt[GBIOSUTIL_SEL].sd);
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}
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if (flags & BIOSARGS_FLAG) {
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ssd.ssd_base = seg->args.base;
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ssd.ssd_limit = seg->args.limit;
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ssdtosd(&ssd, &p_gdt[GBIOSARGS_SEL].sd);
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}
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}
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extern int vm86pa;
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extern void bios16_jmp(void);
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/*
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* this routine is really greedy with selectors, and uses 5:
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*
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* 32-bit code selector: to return to kernel
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* 16-bit code selector: for running code
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* data selector: for 16-bit data
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* util selector: extra utility selector
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* args selector: to handle pointers
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*
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* the util selector is set from the util16 entry in bios16_args, if a
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* "U" specifier is seen.
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*
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* See <machine/pc/bios.h> for description of format specifiers
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*/
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int
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bios16(struct bios_args *args, char *fmt, ...)
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{
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char *p, *stack, *stack_top;
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va_list ap;
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int flags = BIOSCODE_FLAG | BIOSDATA_FLAG;
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u_int i, arg_start, arg_end;
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pt_entry_t *pte;
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pd_entry_t *ptd;
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arg_start = 0xffffffff;
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arg_end = 0;
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/*
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* Some BIOS entrypoints attempt to copy the largest-case
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* argument frame (in order to generalise handling for
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* different entry types). If our argument frame is
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* smaller than this, the BIOS will reach off the top of
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* our constructed stack segment. Pad the top of the stack
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* with some garbage to avoid this.
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*/
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stack = (caddr_t)PAGE_SIZE - 32;
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va_start(ap, fmt);
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for (p = fmt; p && *p; p++) {
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switch (*p) {
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case 'p': /* 32-bit pointer */
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i = va_arg(ap, u_int);
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arg_start = min(arg_start, i);
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arg_end = max(arg_end, i);
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flags |= BIOSARGS_FLAG;
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stack -= 4;
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break;
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case 'i': /* 32-bit integer */
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i = va_arg(ap, u_int);
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stack -= 4;
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break;
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case 'U': /* 16-bit selector */
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flags |= BIOSUTIL_FLAG;
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/* FALLTHROUGH */
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case 'D': /* 16-bit selector */
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case 'C': /* 16-bit selector */
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stack -= 2;
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break;
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case 's': /* 16-bit integer passed as an int */
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i = va_arg(ap, int);
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stack -= 2;
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break;
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default:
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return (EINVAL);
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}
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}
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if (flags & BIOSARGS_FLAG) {
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if (arg_end - arg_start > ctob(16))
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return (EACCES);
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args->seg.args.base = arg_start;
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args->seg.args.limit = 0xffff;
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}
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args->seg.code32.base = (u_int)&bios16_jmp & PG_FRAME;
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args->seg.code32.limit = 0xffff;
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ptd = (pd_entry_t *)rcr3();
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#ifdef PAE
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if (ptd == IdlePDPT)
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#else
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if (ptd == IdlePTD)
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#endif
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{
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/*
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* no page table, so create one and install it.
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*/
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pte = (pt_entry_t *)malloc(PAGE_SIZE, M_TEMP, M_WAITOK);
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ptd = (pd_entry_t *)((u_int)IdlePTD + KERNBASE);
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*pte = (vm86pa - PAGE_SIZE) | PG_RW | PG_V;
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*ptd = vtophys(pte) | PG_RW | PG_V;
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} else {
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/*
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* this is a user-level page table
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*/
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pte = PTmap;
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*pte = (vm86pa - PAGE_SIZE) | PG_RW | PG_V;
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}
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pmap_invalidate_all(kernel_pmap); /* XXX insurance for now */
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stack_top = stack;
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va_start(ap, fmt);
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for (p = fmt; p && *p; p++) {
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switch (*p) {
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case 'p': /* 32-bit pointer */
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i = va_arg(ap, u_int);
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*(u_int *)stack = (i - arg_start) |
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(GSEL(GBIOSARGS_SEL, SEL_KPL) << 16);
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stack += 4;
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break;
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case 'i': /* 32-bit integer */
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i = va_arg(ap, u_int);
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*(u_int *)stack = i;
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stack += 4;
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break;
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case 'U': /* 16-bit selector */
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*(u_short *)stack = GSEL(GBIOSUTIL_SEL, SEL_KPL);
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stack += 2;
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break;
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case 'D': /* 16-bit selector */
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*(u_short *)stack = GSEL(GBIOSDATA_SEL, SEL_KPL);
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stack += 2;
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break;
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case 'C': /* 16-bit selector */
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*(u_short *)stack = GSEL(GBIOSCODE16_SEL, SEL_KPL);
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stack += 2;
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break;
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case 's': /* 16-bit integer passed as an int */
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i = va_arg(ap, int);
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*(u_short *)stack = i;
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stack += 2;
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break;
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default:
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return (EINVAL);
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}
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}
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set_bios_selectors(&args->seg, flags);
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bioscall_vector.vec16.offset = (u_short)args->entry;
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bioscall_vector.vec16.segment = GSEL(GBIOSCODE16_SEL, SEL_KPL);
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i = bios16_call(&args->r, stack_top);
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if (pte == PTmap) {
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*pte = 0; /* remove entry */
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/*
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* XXX only needs to be invlpg(0) but that doesn't work on the 386
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*/
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pmap_invalidate_all(kernel_pmap);
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} else {
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*ptd = 0; /* remove page table */
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/*
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* XXX only needs to be invlpg(0) but that doesn't work on the 386
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*/
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pmap_invalidate_all(kernel_pmap);
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free(pte, M_TEMP); /* ... and free it */
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}
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return (i);
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}
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const u_char *
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bios_string(u_int from, u_int to, const u_char *string, int len)
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{
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@ -489,206 +105,3 @@ bios_string(u_int from, u_int to, const u_char *string, int len)
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return (t);
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return (NULL);
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}
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#ifdef DEV_ISA
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/*
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* PnP BIOS interface; enumerate devices only known to the system
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* BIOS and save information about them for later use.
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*/
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struct pnp_sysdev
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{
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u_int16_t size;
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u_int8_t handle;
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u_int32_t devid;
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u_int8_t type[3];
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u_int16_t attrib;
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#define PNPATTR_NODISABLE (1<<0) /* can't be disabled */
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#define PNPATTR_NOCONFIG (1<<1) /* can't be configured */
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#define PNPATTR_OUTPUT (1<<2) /* can be primary output */
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#define PNPATTR_INPUT (1<<3) /* can be primary input */
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#define PNPATTR_BOOTABLE (1<<4) /* can be booted from */
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#define PNPATTR_DOCK (1<<5) /* is a docking station */
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#define PNPATTR_REMOVEABLE (1<<6) /* device is removeable */
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#define PNPATTR_CONFIG_STATIC (0)
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#define PNPATTR_CONFIG_DYNAMIC (1)
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#define PNPATTR_CONFIG_DYNONLY (3)
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#define PNPATTR_CONFIG(a) (((a) >> 7) & 0x3)
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/* device-specific data comes here */
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u_int8_t devdata[0];
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} __packed;
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/* We have to cluster arguments within a 64k range for the bios16 call */
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struct pnp_sysdevargs
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{
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u_int16_t next;
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struct pnp_sysdev node;
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};
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/*
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* This function is called after the bus has assigned resource
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* locations for a logical device.
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*/
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static void
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pnpbios_set_config(void *arg, struct isa_config *config, int enable)
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{
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}
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/*
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* Quiz the PnP BIOS, build a list of PNP IDs and resource data.
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*/
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static void
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pnpbios_identify(driver_t *driver, device_t parent)
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{
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struct PnPBIOS_table *pt = PnPBIOStable;
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struct bios_args args;
|
||||
struct pnp_sysdev *pd;
|
||||
struct pnp_sysdevargs *pda;
|
||||
u_int16_t ndevs, bigdev;
|
||||
int error, currdev;
|
||||
u_int8_t *devnodebuf, tag;
|
||||
u_int32_t *devid, *compid;
|
||||
int idx, left;
|
||||
device_t dev;
|
||||
|
||||
/* no PnP BIOS information */
|
||||
if (pt == NULL)
|
||||
return;
|
||||
|
||||
/* Check to see if ACPI is already active. */
|
||||
dev = devclass_get_device(devclass_find("acpi"), 0);
|
||||
if (dev != NULL && device_is_attached(dev))
|
||||
return;
|
||||
|
||||
/* get count of PnP devices */
|
||||
bzero(&args, sizeof(args));
|
||||
args.seg.code16.base = BIOS_PADDRTOVADDR(pt->pmentrybase);
|
||||
args.seg.code16.limit = 0xffff; /* XXX ? */
|
||||
args.seg.data.base = BIOS_PADDRTOVADDR(pt->pmdataseg);
|
||||
args.seg.data.limit = 0xffff;
|
||||
args.entry = pt->pmentryoffset;
|
||||
|
||||
if ((error = bios16(&args, PNP_COUNT_DEVNODES, &ndevs, &bigdev)) || (args.r.eax & 0xff))
|
||||
printf("pnpbios: error %d/%x getting device count/size limit\n", error, args.r.eax);
|
||||
ndevs &= 0xff; /* clear high byte garbage */
|
||||
if (bootverbose)
|
||||
printf("pnpbios: %d devices, largest %d bytes\n", ndevs, bigdev);
|
||||
|
||||
devnodebuf = malloc(bigdev + (sizeof(struct pnp_sysdevargs) - sizeof(struct pnp_sysdev)),
|
||||
M_DEVBUF, M_NOWAIT);
|
||||
pda = (struct pnp_sysdevargs *)devnodebuf;
|
||||
pd = &pda->node;
|
||||
|
||||
for (currdev = 0, left = ndevs; (currdev != 0xff) && (left > 0); left--) {
|
||||
|
||||
bzero(pd, bigdev);
|
||||
pda->next = currdev;
|
||||
/* get current configuration */
|
||||
if ((error = bios16(&args, PNP_GET_DEVNODE, &pda->next, &pda->node, 1))) {
|
||||
printf("pnpbios: error %d making BIOS16 call\n", error);
|
||||
break;
|
||||
}
|
||||
if ((error = (args.r.eax & 0xff))) {
|
||||
if (bootverbose)
|
||||
printf("pnpbios: %s 0x%x fetching node %d\n", error & 0x80 ? "error" : "warning", error, currdev);
|
||||
if (error & 0x80)
|
||||
break;
|
||||
}
|
||||
currdev = pda->next;
|
||||
if (pd->size < sizeof(struct pnp_sysdev)) {
|
||||
printf("pnpbios: bogus system node data, aborting scan\n");
|
||||
break;
|
||||
}
|
||||
|
||||
/*
|
||||
* Ignore PICs so that we don't have to worry about the PICs
|
||||
* claiming IRQs to prevent their use. The PIC drivers
|
||||
* already ensure that invalid IRQs are not used.
|
||||
*/
|
||||
if (!strcmp(pnp_eisaformat(pd->devid), "PNP0000")) /* ISA PIC */
|
||||
continue;
|
||||
if (!strcmp(pnp_eisaformat(pd->devid), "PNP0003")) /* APIC */
|
||||
continue;
|
||||
|
||||
/* Add the device and parse its resources */
|
||||
dev = BUS_ADD_CHILD(parent, ISA_ORDER_PNP, NULL, -1);
|
||||
isa_set_vendorid(dev, pd->devid);
|
||||
isa_set_logicalid(dev, pd->devid);
|
||||
/*
|
||||
* It appears that some PnP BIOS doesn't allow us to re-enable
|
||||
* the embedded system device once it is disabled. We shall
|
||||
* mark all system device nodes as "cannot be disabled", regardless
|
||||
* of actual settings in the device attribute byte.
|
||||
* XXX
|
||||
isa_set_configattr(dev,
|
||||
((pd->attrib & PNPATTR_NODISABLE) ? 0 : ISACFGATTR_CANDISABLE) |
|
||||
((!(pd->attrib & PNPATTR_NOCONFIG) &&
|
||||
PNPATTR_CONFIG(pd->attrib) != PNPATTR_CONFIG_STATIC)
|
||||
? ISACFGATTR_DYNAMIC : 0));
|
||||
*/
|
||||
isa_set_configattr(dev,
|
||||
(!(pd->attrib & PNPATTR_NOCONFIG) &&
|
||||
PNPATTR_CONFIG(pd->attrib) != PNPATTR_CONFIG_STATIC)
|
||||
? ISACFGATTR_DYNAMIC : 0);
|
||||
ISA_SET_CONFIG_CALLBACK(parent, dev, pnpbios_set_config, 0);
|
||||
pnp_parse_resources(dev, &pd->devdata[0],
|
||||
pd->size - sizeof(struct pnp_sysdev), 0);
|
||||
if (!device_get_desc(dev))
|
||||
device_set_desc_copy(dev, pnp_eisaformat(pd->devid));
|
||||
|
||||
/* Find device IDs */
|
||||
devid = &pd->devid;
|
||||
compid = NULL;
|
||||
|
||||
/* look for a compatible device ID too */
|
||||
left = pd->size - sizeof(struct pnp_sysdev);
|
||||
idx = 0;
|
||||
while (idx < left) {
|
||||
tag = pd->devdata[idx++];
|
||||
if (PNP_RES_TYPE(tag) == 0) {
|
||||
/* Small resource */
|
||||
switch (PNP_SRES_NUM(tag)) {
|
||||
case PNP_TAG_COMPAT_DEVICE:
|
||||
compid = (u_int32_t *)(pd->devdata + idx);
|
||||
if (bootverbose)
|
||||
printf("pnpbios: node %d compat ID 0x%08x\n", pd->handle, *compid);
|
||||
/* FALLTHROUGH */
|
||||
case PNP_TAG_END:
|
||||
idx = left;
|
||||
break;
|
||||
default:
|
||||
idx += PNP_SRES_LEN(tag);
|
||||
break;
|
||||
}
|
||||
} else
|
||||
/* Large resource, skip it */
|
||||
idx += *(u_int16_t *)(pd->devdata + idx) + 2;
|
||||
}
|
||||
if (bootverbose) {
|
||||
printf("pnpbios: handle %d device ID %s (%08x)",
|
||||
pd->handle, pnp_eisaformat(*devid), *devid);
|
||||
if (compid != NULL)
|
||||
printf(" compat ID %s (%08x)",
|
||||
pnp_eisaformat(*compid), *compid);
|
||||
printf("\n");
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static device_method_t pnpbios_methods[] = {
|
||||
/* Device interface */
|
||||
DEVMETHOD(device_identify, pnpbios_identify),
|
||||
|
||||
{ 0, 0 }
|
||||
};
|
||||
|
||||
static driver_t pnpbios_driver = {
|
||||
"pnpbios",
|
||||
pnpbios_methods,
|
||||
1, /* no softc */
|
||||
};
|
||||
|
||||
static devclass_t pnpbios_devclass;
|
||||
|
||||
DRIVER_MODULE(pnpbios, isa, pnpbios_driver, pnpbios_devclass, 0, 0);
|
||||
#endif /* DEV_ISA */
|
||||
|
||||
@ -30,245 +30,12 @@
|
||||
#ifndef _MACHINE_PC_BIOS_H_
|
||||
#define _MACHINE_PC_BIOS_H_
|
||||
|
||||
/*
|
||||
* Signature structure for the BIOS32 Service Directory header
|
||||
*/
|
||||
struct bios32_SDheader
|
||||
{
|
||||
u_int8_t sig[4];
|
||||
u_int32_t entry;
|
||||
u_int8_t revision;
|
||||
u_int8_t len;
|
||||
u_int8_t cksum;
|
||||
u_int8_t pad[5];
|
||||
};
|
||||
|
||||
/*
|
||||
* BIOS32 Service Directory entry. Caller supplies name, bios32_SDlookup
|
||||
* fills in the rest of the details.
|
||||
*/
|
||||
struct bios32_SDentry
|
||||
{
|
||||
union
|
||||
{
|
||||
u_int8_t name[4]; /* service identifier */
|
||||
u_int32_t id; /* as a 32-bit value */
|
||||
} ident;
|
||||
u_int32_t base; /* base of service */
|
||||
u_int32_t len; /* service length */
|
||||
u_int32_t entry; /* entrypoint offset from base */
|
||||
vm_offset_t ventry; /* entrypoint in kernel virtual segment */
|
||||
};
|
||||
|
||||
extern int bios32_SDlookup(struct bios32_SDentry *ent);
|
||||
extern u_int32_t bios_sigsearch(u_int32_t start, u_char *sig, int siglen,
|
||||
int paralen, int sigofs);
|
||||
|
||||
#define BIOS_PADDRTOVADDR(x) ((x) + KERNBASE)
|
||||
#define BIOS_VADDRTOPADDR(x) ((x) - KERNBASE)
|
||||
|
||||
|
||||
/*
|
||||
* PnP BIOS presence structure
|
||||
*/
|
||||
struct PnPBIOS_table
|
||||
{
|
||||
u_int8_t sig[4]; /* "$PnP */
|
||||
u_int8_t version; /* should be 0x10 */
|
||||
u_int8_t len; /* total structure length */
|
||||
u_int16_t control; /* BIOS feature flags */
|
||||
u_int8_t cksum; /* checksum */
|
||||
u_int32_t evflagaddr; /* address of event notificaton flag */
|
||||
u_int16_t rmentryoffset; /* real-mode entry offset */
|
||||
u_int16_t rmentryseg; /* segment */
|
||||
u_int16_t pmentryoffset; /* protected-mode entry offset */
|
||||
u_int32_t pmentrybase; /* segment base */
|
||||
u_int32_t oemdevid; /* motherboard EISA ID */
|
||||
u_int16_t rmbiosseg; /* real-mode BIOS segment */
|
||||
u_int32_t pmdataseg; /* protected-mode data segment */
|
||||
} __packed;
|
||||
|
||||
|
||||
/*
|
||||
* Exported lookup results
|
||||
*/
|
||||
extern struct bios32_SDentry PCIbios;
|
||||
|
||||
struct segment_info {
|
||||
u_int base;
|
||||
u_int limit;
|
||||
};
|
||||
|
||||
#define BIOSCODE_FLAG 0x01
|
||||
#define BIOSDATA_FLAG 0x02
|
||||
#define BIOSUTIL_FLAG 0x04
|
||||
#define BIOSARGS_FLAG 0x08
|
||||
|
||||
struct bios_segments {
|
||||
struct segment_info code32; /* 32-bit code (mandatory) */
|
||||
struct segment_info code16; /* 16-bit code */
|
||||
struct segment_info data; /* 16-bit data */
|
||||
struct segment_info util; /* 16-bit utility */
|
||||
struct segment_info args; /* 16-bit args */
|
||||
};
|
||||
|
||||
struct bios_regs {
|
||||
u_int eax;
|
||||
u_int ebx;
|
||||
u_int ecx;
|
||||
u_int edx;
|
||||
u_int esi;
|
||||
u_int edi;
|
||||
};
|
||||
|
||||
struct bios_args {
|
||||
u_int entry; /* entry point of routine */
|
||||
struct bios_regs r;
|
||||
struct bios_segments seg;
|
||||
};
|
||||
|
||||
/*
|
||||
* PnP BIOS return codes
|
||||
*/
|
||||
#define PNP_SUCCESS 0x00
|
||||
#define PNP_NOT_SET_STATICALLY 0x7f
|
||||
#define PNP_UNKNOWN_FUNCTION 0x81
|
||||
#define PNP_FUNTION_NOT_SUPPORTED 0x82
|
||||
#define PNP_INVALID_HANDLE 0x83
|
||||
#define PNP_BAD_PARAMETER 0x84
|
||||
#define PNP_SET_FAILED 0x85
|
||||
#define PNP_EVENTS_NOT_PENDING 0x86
|
||||
#define PNP_SYSTEM_NOT_DOCKED 0x87
|
||||
#define PNP_NO_ISA_PNP_CARDS 0x88
|
||||
#define PNP_UNABLE_TO_DETERMINE_DOCK_CAPABILITIES 0x89
|
||||
#define PNP_CONFIG_CHANGE_FAILED_NO_BATTERY 0x8a
|
||||
#define PNP_CONFIG_CHANGE_FAILED_RESOURCE_CONFLICT 0x8b
|
||||
#define PNP_BUFFER_TOO_SMALL 0x8c
|
||||
#define PNP_USE_ESCD_SUPPORT 0x8d
|
||||
#define PNP_MESSAGE_NOT_SUPPORTED 0x8e
|
||||
#define PNP_HARDWARE_ERROR 0x8f
|
||||
|
||||
/*
|
||||
* DMI return codes
|
||||
*/
|
||||
#define DMI_SUCCESS 0x00
|
||||
#define DMI_UNKNOWN_FUNCTION 0x81
|
||||
#define DMI_FUNCTION_NOT_SUPPORTED 0x82
|
||||
#define DMI_INVALID_HANDLE 0x83
|
||||
#define DMI_BAD_PARAMETER 0x84
|
||||
#define DMI_INVALID_SUBFUNCTION 0x85
|
||||
#define DMI_NO_CHANGE 0x86
|
||||
#define DMI_ADD_STRUCTURE_FAILED 0x87
|
||||
#define DMI_READ_ONLY 0x8d
|
||||
#define DMI_LOCK_NOT_SUPPORTED 0x90
|
||||
#define DMI_CURRENTLY_LOCKED 0x91
|
||||
#define DMI_INVALID_LOCK 0x92
|
||||
|
||||
/*
|
||||
* format specifiers and defines for bios16()
|
||||
* s = short (16 bits)
|
||||
* i = int (32 bits)
|
||||
* p = pointer (converted to seg:offset)
|
||||
* C,D,U = selector (corresponding to code/data/utility segment)
|
||||
*/
|
||||
#define PNP_COUNT_DEVNODES "sppD", 0x00
|
||||
#define PNP_GET_DEVNODE "sppsD", 0x01
|
||||
#define PNP_SET_DEVNODE "sspsD", 0x02
|
||||
#define PNP_GET_EVENT "spD", 0x03
|
||||
#define PNP_SEND_MSG "ssD", 0x04
|
||||
#define PNP_GET_DOCK_INFO "spD", 0x05
|
||||
|
||||
#define PNP_SEL_PRIBOOT "ssiiisspD", 0x07
|
||||
#define PNP_GET_PRIBOOT "sspppppD", 0x08
|
||||
#define PNP_SET_RESINFO "spD", 0x09
|
||||
#define PNP_GET_RESINFO "spD", 0x0A
|
||||
#define PNP_GET_APM_ID "sppD", 0x0B
|
||||
|
||||
#define PNP_GET_ISA_INFO "spD", 0x40
|
||||
#define PNP_GET_ECSD_INFO "spppD", 0x41
|
||||
#define PNP_READ_ESCD "spUD", 0x42
|
||||
#define PNP_WRITE_ESCD "spUD", 0x43
|
||||
|
||||
#define PNP_GET_DMI_INFO "spppppD", 0x50
|
||||
#define PNP_GET_DMI_STRUCTURE "sppUD", 0x51
|
||||
#define PNP_SET_DMI_STRUCTURE "sppsUD" 0x52
|
||||
#define PNP_GET_DMI_CHANGE "spUD" 0x53
|
||||
#define PNP_DMI_CONTROL "sspsUD" 0x54
|
||||
#define PNP_GET_GPNV_INFO "sppppD" 0x55
|
||||
#define PNP_READ_GPNV_DATA "ssppUD" 0x56
|
||||
#define PNP_WRITE_GPNV_DATA "sspsUD" 0x57
|
||||
|
||||
#define PNP_BOOT_CHECK "sp", 0x60
|
||||
#define PNP_COUNT_IPL "sppp", 0x61
|
||||
#define PNP_GET_BOOTPRI "spp", 0x62
|
||||
#define PNP_SET_BOOTPRI "sp", 0x63
|
||||
#define PNP_GET_LASTBOOT "sp", 0x64
|
||||
#define PNP_GET_BOOTFIRST "sp", 0x65
|
||||
#define PNP_SET_BOOTFIRST "sp", 0x66
|
||||
|
||||
/*
|
||||
* PCI BIOS functions
|
||||
*/
|
||||
#define PCIBIOS_BIOS_PRESENT 0xb101
|
||||
#define PCIBIOS_READ_CONFIG_BYTE 0xb108
|
||||
#define PCIBIOS_READ_CONFIG_WORD 0xb109
|
||||
#define PCIBIOS_READ_CONFIG_DWORD 0xb10a
|
||||
#define PCIBIOS_WRITE_CONFIG_BYTE 0xb10b
|
||||
#define PCIBIOS_WRITE_CONFIG_WORD 0xb10c
|
||||
#define PCIBIOS_WRITE_CONFIG_DWORD 0xb10d
|
||||
#define PCIBIOS_GET_IRQ_ROUTING 0xb10e
|
||||
#define PCIBIOS_ROUTE_INTERRUPT 0xb10f
|
||||
|
||||
extern int bios16(struct bios_args *, char *, ...);
|
||||
extern int bios16_call(struct bios_regs *, char *);
|
||||
extern int bios32(struct bios_regs *, u_int, u_short);
|
||||
extern void set_bios_selectors(struct bios_segments *, int);
|
||||
|
||||
/*
|
||||
* PCI interrupt routing table.
|
||||
*
|
||||
* $PIR in the BIOS segment contains a PIR_table
|
||||
* int 1a:b106 returns PIR_table in buffer at es:(e)di
|
||||
* int 1a:b18e returns PIR_table in buffer at es:(e)di
|
||||
* int 1a:b406 returns es:di pointing to the BIOS PIR_table
|
||||
*/
|
||||
struct PIR_header
|
||||
{
|
||||
int8_t ph_signature[4];
|
||||
u_int16_t ph_version;
|
||||
u_int16_t ph_length;
|
||||
u_int8_t ph_router_bus;
|
||||
u_int8_t ph_router_dev_fn;
|
||||
u_int16_t ph_pci_irqs;
|
||||
u_int16_t ph_router_vendor;
|
||||
u_int16_t ph_router_device;
|
||||
u_int32_t ph_miniport;
|
||||
u_int8_t ph_res[11];
|
||||
u_int8_t ph_checksum;
|
||||
} __packed;
|
||||
|
||||
struct PIR_intpin
|
||||
{
|
||||
u_int8_t link;
|
||||
u_int16_t irqs;
|
||||
} __packed;
|
||||
|
||||
struct PIR_entry
|
||||
{
|
||||
u_int8_t pe_bus;
|
||||
u_int8_t pe_res1:3;
|
||||
u_int8_t pe_device:5;
|
||||
struct PIR_intpin pe_intpin[4];
|
||||
u_int8_t pe_slot;
|
||||
u_int8_t pe_res3;
|
||||
} __packed;
|
||||
|
||||
struct PIR_table
|
||||
{
|
||||
struct PIR_header pt_header;
|
||||
struct PIR_entry pt_entry[0];
|
||||
} __packed;
|
||||
|
||||
/*
|
||||
* Int 15:E820 'SMAP' structure
|
||||
*
|
||||
|
||||
Loading…
Reference in New Issue
Block a user