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xserver/hw/xfree86/int10/helper_mem.c

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/* $XFree86: xc/programs/Xserver/hw/xfree86/int10/helper_mem.c,v 1.25 2002/09/16 18:06:08 eich Exp $ */
/*
* XFree86 int10 module
* execute BIOS int 10h calls in x86 real mode environment
* Copyright 1999 Egbert Eich
*/
#include "xf86.h"
#include "xf86_OSproc.h"
#include "xf86_ansic.h"
#include "compiler.h"
#include "xf86Pci.h"
#define _INT10_PRIVATE
#if 0
#include "int10Defines.h"
#endif
#include "xf86int10.h"
#define REG pInt
typedef enum {
OPT_NOINT10,
OPT_INIT_PRIMARY,
OPT_BIOS_LOCATION
} INT10Opts;
static const OptionInfoRec INT10Options[] = {
{OPT_NOINT10, "NoINT10", OPTV_BOOLEAN, {0}, FALSE },
{OPT_INIT_PRIMARY, "InitPrimary", OPTV_BOOLEAN, {0}, FALSE },
{OPT_BIOS_LOCATION, "BiosLocation", OPTV_STRING, {0}, FALSE },
{ -1, NULL, OPTV_NONE, {0}, FALSE },
};
#ifdef DEBUG
void
dprint(unsigned long start, unsigned long size)
{
int i,j;
char *c = (char *)start;
for (j = 0; j < (size >> 4); j++) {
char *d = c;
ErrorF("\n0x%lx: ",(unsigned long)c);
for (i = 0; i<16; i++)
ErrorF("%2.2x ",(unsigned char) (*(c++)));
c = d;
for (i = 0; i<16; i++) {
ErrorF("%c",((((CARD8)(*c)) > 32) && (((CARD8)(*c)) < 128)) ?
(unsigned char) (*(c)): '.');
c++;
}
}
ErrorF("\n");
}
#endif
#ifndef _PC
/*
* here we are really paranoid about faking a "real"
* BIOS. Most of this information was pulled from
* dosemu.
*/
void
setup_int_vect(xf86Int10InfoPtr pInt)
{
int i;
/* let the int vects point to the SYS_BIOS seg */
for (i = 0; i < 0x80; i++) {
MEM_WW(pInt, i << 2, 0);
MEM_WW(pInt, (i << 2) + 2, SYS_BIOS >> 4);
}
reset_int_vect(pInt);
/* font tables default location (int 1F) */
MEM_WW(pInt,0x1f<<2,0xfa6e);
/* int 11 default location (Get Equipment Configuration) */
MEM_WW(pInt, 0x11 << 2, 0xf84d);
/* int 12 default location (Get Conventional Memory Size) */
MEM_WW(pInt, 0x12 << 2, 0xf841);
/* int 15 default location (I/O System Extensions) */
MEM_WW(pInt, 0x15 << 2, 0xf859);
/* int 1A default location (RTC, PCI and others) */
MEM_WW(pInt, 0x1a << 2, 0xff6e);
/* int 05 default location (Bound Exceeded) */
MEM_WW(pInt, 0x05 << 2, 0xff54);
/* int 08 default location (Double Fault) */
MEM_WW(pInt, 0x08 << 2, 0xfea5);
/* int 13 default location (Disk) */
MEM_WW(pInt, 0x13 << 2, 0xec59);
/* int 0E default location (Page Fault) */
MEM_WW(pInt, 0x0e << 2, 0xef57);
/* int 17 default location (Parallel Port) */
MEM_WW(pInt, 0x17 << 2, 0xefd2);
/* fdd table default location (int 1e) */
MEM_WW(pInt, 0x1e << 2, 0xefc7);
/* Set Equipment flag to VGA */
i = MEM_RB(pInt, 0x0410) & 0xCF;
MEM_WB(pInt, 0x0410, i);
/* XXX Perhaps setup more of the BDA here. See also int42(0x00). */
}
#endif
int
setup_system_bios(void *base_addr)
{
char *base = (char *) base_addr;
/*
* we trap the "industry standard entry points" to the BIOS
* and all other locations by filling them with "hlt"
* TODO: implement hlt-handler for these
*/
memset(base, 0xf4, 0x10000);
/* set bios date */
strcpy(base + 0x0FFF5, "06/11/99");
/* set up eisa ident string */
strcpy(base + 0x0FFD9, "PCI_ISA");
/* write system model id for IBM-AT */
*((unsigned char *)(base + 0x0FFFE)) = 0xfc;
return 1;
}
void
reset_int_vect(xf86Int10InfoPtr pInt)
{
/*
* This table is normally located at 0xF000:0xF0A4. However, int 0x42,
* function 0 (Mode Set) expects it (or a copy) somewhere in the bottom
* 64kB. Note that because this data doesn't survive POST, int 0x42 should
* only be used during EGA/VGA BIOS initialisation.
*/
static const CARD8 VideoParms[] = {
/* Timing for modes 0x00 & 0x01 */
0x38, 0x28, 0x2d, 0x0a, 0x1f, 0x06, 0x19, 0x1c,
0x02, 0x07, 0x06, 0x07, 0x00, 0x00, 0x00, 0x00,
/* Timing for modes 0x02 & 0x03 */
0x71, 0x50, 0x5a, 0x0a, 0x1f, 0x06, 0x19, 0x1c,
0x02, 0x07, 0x06, 0x07, 0x00, 0x00, 0x00, 0x00,
/* Timing for modes 0x04, 0x05 & 0x06 */
0x38, 0x28, 0x2d, 0x0a, 0x7f, 0x06, 0x64, 0x70,
0x02, 0x01, 0x06, 0x07, 0x00, 0x00, 0x00, 0x00,
/* Timing for mode 0x07 */
0x61, 0x50, 0x52, 0x0f, 0x19, 0x06, 0x19, 0x19,
0x02, 0x0d, 0x0b, 0x0c, 0x00, 0x00, 0x00, 0x00,
/* Display page lengths in little endian order */
0x00, 0x08, /* Modes 0x00 and 0x01 */
0x00, 0x10, /* Modes 0x02 and 0x03 */
0x00, 0x40, /* Modes 0x04 and 0x05 */
0x00, 0x40, /* Modes 0x06 and 0x07 */
/* Number of columns for each mode */
40, 40, 80, 80, 40, 40, 80, 80,
/* CGA Mode register value for each mode */
0x2c, 0x28, 0x2d, 0x29, 0x2a, 0x2e, 0x1e, 0x29,
/* Padding */
0x00, 0x00, 0x00, 0x00
};
int i;
for (i = 0; i < sizeof(VideoParms); i++)
MEM_WB(pInt, i + (0x1000 - sizeof(VideoParms)), VideoParms[i]);
MEM_WW(pInt, 0x1d << 2, 0x1000 - sizeof(VideoParms));
MEM_WW(pInt, (0x1d << 2) + 2, 0);
MEM_WW(pInt, 0x10 << 2, 0xf065);
MEM_WW(pInt, (0x10 << 2) + 2, SYS_BIOS >> 4);
MEM_WW(pInt, 0x42 << 2, 0xf065);
MEM_WW(pInt, (0x42 << 2) + 2, SYS_BIOS >> 4);
MEM_WW(pInt, 0x6D << 2, 0xf065);
MEM_WW(pInt, (0x6D << 2) + 2, SYS_BIOS >> 4);
}
void
set_return_trap(xf86Int10InfoPtr pInt)
{
/*
* Here we set the exit condition: We return when we encounter
* 'hlt' (=0xf4), which we locate at address 0x600 in x86 memory.
*/
MEM_WB(pInt, 0x0600, 0xf4);
/*
* Allocate a segment for the stack
*/
xf86Int10AllocPages(pInt, 1, &pInt->stackseg);
}
void *
xf86HandleInt10Options(ScrnInfoPtr pScrn, int entityIndex)
{
EntityInfoPtr pEnt = xf86GetEntityInfo(entityIndex);
OptionInfoPtr options = NULL;
if (pEnt->device) {
pointer configOptions = NULL;
/* Check if xf86CollectOptions() has already been called */
if (((pEnt->index < 0) ||
!pScrn ||
!(configOptions = pScrn->options)) &&
pEnt->device)
configOptions = pEnt->device->options;
if (configOptions) {
if (!(options = (OptionInfoPtr) xalloc(sizeof(INT10Options))))
return NULL;
(void)memcpy(options, INT10Options, sizeof(INT10Options));
xf86ProcessOptions(pScrn->scrnIndex, configOptions, options);
}
}
xfree(pEnt);
return options;
}
Bool
int10skip(void* options)
{
Bool noint10 = FALSE;
if (!options) return FALSE;
xf86GetOptValBool(options, OPT_NOINT10, &noint10);
return noint10;
}
Bool
int10_check_bios(int scrnIndex, int codeSeg, unsigned char* vbiosMem)
{
int size;
if ((codeSeg & 0x1f) || /* Not 512-byte aligned otherwise */
((codeSeg << 4) < V_BIOS) ||
((codeSeg << 4) >= SYS_SIZE))
return FALSE;
if (xf86IsPc98())
return FALSE;
if ((*vbiosMem != 0x55) || (*(vbiosMem+1) != 0xAA) || !*(vbiosMem+2))
return FALSE;
size = *(vbiosMem + 2) * 512;
if ((size + (codeSeg << 4)) > SYS_SIZE)
return FALSE;
if (bios_checksum(vbiosMem, size))
xf86DrvMsg(scrnIndex, X_WARNING, "Bad V_BIOS checksum\n");
return TRUE;
}
Bool
initPrimary(void* options)
{
Bool initPrimary = FALSE;
if (!options) return FALSE;
xf86GetOptValBool(options, OPT_INIT_PRIMARY, &initPrimary);
return initPrimary;
}
/*
* xf86int10ParseBiosLocation(): allows to set the location of the
* BIOS. One may select a BIOS of another card for posting or the
* legacy V_BIOS range located at 0xc0000 or an alternative address
* (BUS_ISA).
* This is only useful under very special circumstances and should
* be used with extreme care.
*/
void
xf86int10ParseBiosLocation(void* options,
xf86int10BiosLocationPtr bios)
{
char *s;
char *p;
char *str = NULL;
if (options)
str = xf86GetOptValString(options,OPT_BIOS_LOCATION);
bios->bus = BUS_NONE;
if (!str)
return;
s = xstrdup(str);
p = strtok(s,":");
if (xf86NameCmp(p,"pci") == 0) bios->bus = BUS_PCI;
else
if (xf86NameCmp(p,"primary") == 0) bios->bus = BUS_ISA;
xfree(s);
if (bios->bus == BUS_NONE) return;
s = xstrdup(str);
p = strchr(s, ':');
switch (bios->bus) {
case BUS_ISA:
if (p)
bios->location.legacy = atoi(++p);
else
bios->location.legacy = 0;
break;
case BUS_PCI:
if (p) {
bios->location.pci.bus = atoi(++p);
if ((p = strchr(p, ':'))) {
bios->location.pci.dev = atoi(++p);
if ((p = strchr(p, ':'))) {
bios->location.pci.func = atoi(++p);
break;
}
}
}
/* fall through */
bios->bus = BUS_NONE;
break;
default:
break;
}
xfree(s);
}
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