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/* $XFree86: xc/programs/Xserver/hw/xfree86/int10/pci.c,v 1.4 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 "xf86Pci.h"
#include "xf86.h"
#include "xf86str.h"
#include "xf86_ansic.h"
#define _INT10_PRIVATE
#include "xf86int10.h"
int
mapPciRom(xf86Int10InfoPtr pInt, unsigned char * address)
{
PCITAG tag;
unsigned long offset = 0;
unsigned char *mem, *ptr;
unsigned char *scratch = NULL;
int length = 0;
pciVideoPtr pvp = xf86GetPciInfoForEntity(pInt->entityIndex);
if (pvp == NULL) {
#ifdef DEBUG
ErrorF("mapPciRom: no PCI info\n");
#endif
return 0;
}
tag = pciTag(pvp->bus,pvp->device,pvp->func);
mem = ptr = xnfcalloc(0x10000, 1);
if (! xf86ReadPciBIOS(offset,tag,-1,mem,0xFFFF) < 0) {
xfree(mem);
#ifdef DEBUG
ErrorF("mapPciRom: cannot read BIOS\n");
#endif
return 0;
}
while ( *ptr == 0x55 && *(ptr+1) == 0xAA) {
unsigned short data_off = *(ptr+0x18) | (*(ptr+0x19)<< 8);
unsigned char *data = ptr + data_off;
unsigned char type;
if (*data!='P' || *(data+1)!='C' || *(data+2)!='I' || *(data+3)!='R')
break;
type = *(data + 0x14);
#ifdef PRINT_PCI
ErrorF("data segment in BIOS: 0x%x, type: 0x%x ",data_off,type);
#endif
if (type != 0) { /* not PC-AT image: find next one */
unsigned int image_length;
unsigned char indicator = *(data + 0x15);
if (indicator & 0x80) /* last image */
break;
image_length = (*(data + 0x10)
| (*(data + 0x11) << 8)) << 9;
#ifdef PRINT_PCI
ErrorF("data image length: 0x%x, ind: 0x%x\n",
image_length,indicator);
#endif
offset = offset + image_length;
if (xf86ReadPciBIOS(offset,tag,-1,mem,0xFFFF) < 0) {
xfree(mem);
#ifdef DEBUG
ErrorF("mapPciRom: cannot read BIOS\n");
#endif
return 0;
}
continue;
}
/* OK, we have a PC Image */
length = (*(ptr + 2) << 9);
#ifdef PRINT_PCI
ErrorF("BIOS length: 0x%x\n",length);
#endif
scratch = (unsigned char *)xnfalloc(length);
if (xf86ReadPciBIOS(offset,tag,-1,scratch,length) < 0) {
xfree(mem);
xfree(scratch);
#ifdef DEBUG
ErrorF("mapPciRom: cannot read BIOS\n");
#endif
return 0;
}
break;
}
/* unmap/close/disable PCI bios mem */
xfree(mem);
if (scratch && length) {
memcpy(address, scratch, length);
xfree(scratch);
}
#ifdef DEBUG
if (!length)
ErrorF("mapPciRom: no BIOS found\n");
#ifdef PRINT_PCI
if (length)
dprint(address,0x20);
#endif
#endif
return length;
}
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