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/* $XFree86: xc/programs/Xserver/hw/xfree86/int10/pci.c,v 1.12 2002/04/04 14:05:51 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 "xf86_ansic.h"
#define _INT10_PRIVATE
#include "xf86int10.h"
int
mapPciRom(int pciEntity, unsigned char * address)
{
PCITAG tag;
unsigned char *mem, *ptr;
int length;
pciVideoPtr pvp = xf86GetPciInfoForEntity(pciEntity);
if (pvp == NULL) {
#ifdef DEBUG
ErrorF("mapPciRom: no PCI info\n");
#endif
return 0;
}
tag = pciTag(pvp->bus,pvp->device,pvp->func);
length = 1 << pvp->biosSize;
/* Read in entire PCI ROM */
mem = ptr = xnfcalloc(length, 1);
length = xf86ReadPciBIOS(0, tag, -1, ptr, length);
if (length > 0)
memcpy(address, ptr, length);
/* unmap/close/disable PCI bios mem */
xfree(mem);
#ifdef DEBUG
if (!length)
ErrorF("mapPciRom: no BIOS found\n");
#ifdef PRINT_PCI
else
dprint(address,0x20);
#endif
#endif
return length;
}
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