xorg-server-1.4/hw/xfree86/int10/pci.c

   1
   2 /*
   3  *                   XFree86 int10 module
   4  *   execute BIOS int 10h calls in x86 real mode environment
   5  *                 Copyright 1999 Egbert Eich
   6  */
   7 #ifdef HAVE_XORG_CONFIG_H
   8 #include <xorg-config.h>
   9 #endif
  10
  11 #include <string.h>
  12
  13 #include "xf86Pci.h"
  14 #include "xf86.h"
  15 #define _INT10_PRIVATE
  16 #include "xf86int10.h"
  17
  18 int
  19 mapPciRom(int pciEntity, unsigned char * address)
  20 {
  21     PCITAG tag;
  22     unsigned char *mem, *ptr;
  23     int length;
  24
  25     pciVideoPtr pvp = xf86GetPciInfoForEntity(pciEntity);
  26
  27     if (pvp == NULL) {
  28 #ifdef DEBUG
  29         ErrorF("mapPciRom: no PCI info\n");
  30 #endif
  31         return 0;
  32     }
  33
  34     tag = pciTag(pvp->bus,pvp->device,pvp->func);
  35     length = 1 << pvp->biosSize;
  36
  37     /* Read in entire PCI ROM */
  38     mem = ptr = xnfcalloc(length, 1);
  39     length = xf86ReadPciBIOS(0, tag, -1, ptr, length);
  40     if (length > 0)
  41         memcpy(address, ptr, length);
  42     /* unmap/close/disable PCI bios mem */
  43     xfree(mem);
  44
  45 #ifdef DEBUG
  46     if (!length)
  47         ErrorF("mapPciRom: no BIOS found\n");
  48 #ifdef PRINT_PCI
  49     else
  50         dprint(address,0x20);
  51 #endif
  52 #endif
  53
  54     return length;
  55 }