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/* $XFree86: xc/programs/Xserver/hw/xfree86/int10/helper_mem.c,v 1.12 2000/11/03 18:46:16 eich Exp $ */
/*
* XFree86 int10 module
* execute BIOS int 10h calls in x86 real mode environment
* Copyright 1999 Egbert Eich
*/
#include "xf86.h"
#include "xf86str.h"
#include "xf86_OSproc.h"
#include "xf86_ansic.h"
#include "compiler.h"
#include "xf86Pci.h"
#define _INT10_PRIVATE
#include "int10Defines.h"
#include "xf86int10.h"
#define REG pInt
typedef enum {
OPT_NOINT10
} INT10Opts;
static OptionInfoRec INT10Options[] = {
{OPT_NOINT10, "NoINT10", OPTV_BOOLEAN, {0}, FALSE },
{ -1, NULL, OPTV_NONE, {0}, FALSE },
};
#define nINT10Options (sizeof(INT10Options) / sizeof(INT10Options[0]))
#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
/*
* here we are really paranoid about faking a "real"
* BIOS. Most of this information was pulled from
* dosemu.
*/
void
setup_int_vect(xf86Int10InfoPtr pInt)
{
const CARD16 cs = (SYS_BIOS >> 4);
const CARD16 ip = 0x0;
int i;
/* let the int vects point to the SYS_BIOS seg */
for (i=0; i<0x80; i++) {
MEM_WW(pInt,(i<<2),ip);
MEM_WW(pInt,((i<<2)+2),cs);
}
/* video interrupts default location */
MEM_WW(pInt,(0x42<<2),0xf065);
MEM_WW(pInt,(0x10<<2),0xf065);
MEM_WW(pInt,(0x6D<<2),0xf065);
/* video param table default location (int 1d) */
MEM_WW(pInt,(0x1d<<2),0xf0A4);
/* font tables default location (int 1F) */
MEM_WW(pInt,(0x1f<<2),0xfa6e);
/* int 11 default location */
MEM_WW(pInt,(0x11<<2),0xf84d);
/* int 12 default location */
MEM_WW(pInt,(0x12<<2),0xf841);
/* int 15 default location */
MEM_WW(pInt,(0x15<<2),0xf859);
/* int 1A default location */
MEM_WW(pInt,(0x1a<<2),0xff6e);
/* int 05 default location */
MEM_WW(pInt,(0x05<<2),0xff54);
/* int 08 default location */
MEM_WW(pInt,(0x08<<2),0xfea5);
/* int 13 default location (fdd) */
MEM_WW(pInt,(0x13<<2),0xec59);
/* int 0E default location */
MEM_WW(pInt,(0x0e<<2),0xef57);
/* int 17 default location */
MEM_WW(pInt,(0x17<<2),0xefd2);
/* fdd table default location (int 1e) */
MEM_WW(pInt,(0x1e<<2),0xefc7);
}
int
setup_system_bios(memType base_addr)
{
char *date = "06/01/99";
char *eisa_ident = "PCI/ISA";
CARD16 *base = (CARD16*) 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((void *)(base),0xf4,0x10000);
/* set bios date */
strcpy((((char *)base) + 0xFFF5),date);
/* set up eisa ident string */
strcpy((((char *)base) + 0xFFD9),eisa_ident);
/* write system model id for IBM-AT */
*(((unsigned char *)base) + 0xFFFE) = 0xfc;
return 1;
}
void
reset_int_vect(xf86Int10InfoPtr pInt)
{
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 also set the exit condition:
* we return when we encounter 'hlt' (^=0xf4) this
* will be located at address 0x600 in x86 memory.
*/
MEM_WB(pInt,0x600,0xf4);
}
Bool
int10skip(ScrnInfoPtr pScrn, int entityIndex)
{
Bool noint10 = FALSE;
EntityInfoPtr pEnt = xf86GetEntityInfo(entityIndex);
if (pEnt->device && pEnt->device->options) {
OptionInfoRec options[nINT10Options];
(void)memcpy(options, INT10Options, sizeof(INT10Options));
xf86ProcessOptions(pScrn->scrnIndex, pEnt->device->options, options);
xf86GetOptValBool(options, OPT_NOINT10, &noint10);
}
xfree(pEnt);
return noint10;
}
Bool
int10_read_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 ((codeSeg << 4) >= SYS_BIOS)
return TRUE;
if (xf86IsPc98())
return FALSE;
if (xf86ReadBIOS(codeSeg << 4, 0, vbiosMem, 0x10) < 0) {
xf86DrvMsg(scrnIndex,X_WARNING,"Cannot read V_BIOS (1)\n");
return FALSE;
}
if ((*vbiosMem != 0x55) || (*(vbiosMem+1) != 0xAA) || !*(vbiosMem+2) ||
(*(vbiosMem+2) > 0x80U))
return FALSE;
size = *(vbiosMem + 2) * 512;
if ((size + (codeSeg << 4)) > SYS_SIZE)
return FALSE;
#ifdef _PC
/*
* Read everything between V_BIOS start and SYS_BIOS:
* Some systems with built in graphics might jump here.
*/
size = SYS_BIOS - (codeSeg << 4);
#else
/* We might already have the tail end */
if ((size + (codeSeg << 4)) > SYS_BIOS)
size = SYS_BIOS - (codeSeg << 4);
#endif
if (xf86ReadBIOS(codeSeg << 4,0,vbiosMem, size) < 0) {
xf86DrvMsg(scrnIndex,X_ERROR,"Cannot read V_BIOS (2)\n");
return FALSE;
}
if (bios_checksum(vbiosMem, size))
xf86DrvMsg(scrnIndex, X_WARNING, "Bad V_BIOS checksum\n");
return TRUE;
}
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