52 lines
1.1 KiB
C
52 lines
1.1 KiB
C
/* $XFree86: xc/programs/Xserver/hw/xfree86/int10/pci.c,v 1.12 2002/04/04 14:05:51 eich Exp $ */
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/*
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* XFree86 int10 module
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* execute BIOS int 10h calls in x86 real mode environment
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* Copyright 1999 Egbert Eich
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*/
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#include "xf86Pci.h"
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#include "xf86.h"
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#include "xf86_ansic.h"
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#define _INT10_PRIVATE
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#include "xf86int10.h"
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int
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mapPciRom(int pciEntity, unsigned char * address)
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{
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PCITAG tag;
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unsigned char *mem, *ptr;
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int length;
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pciVideoPtr pvp = xf86GetPciInfoForEntity(pciEntity);
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if (pvp == NULL) {
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#ifdef DEBUG
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ErrorF("mapPciRom: no PCI info\n");
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#endif
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return 0;
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}
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tag = pciTag(pvp->bus,pvp->device,pvp->func);
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length = 1 << pvp->biosSize;
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/* Read in entire PCI ROM */
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mem = ptr = xnfcalloc(length, 1);
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length = xf86ReadPciBIOS(0, tag, -1, ptr, length);
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if (length > 0)
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memcpy(address, ptr, length);
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/* unmap/close/disable PCI bios mem */
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xfree(mem);
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#ifdef DEBUG
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if (!length)
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ErrorF("mapPciRom: no BIOS found\n");
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#ifdef PRINT_PCI
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else
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dprint(address,0x20);
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#endif
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#endif
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return length;
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}
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