util/vgabios/int1a.c

   1 #include <stdio.h>
   2 #include "test.h"
   3 #include "pci-userspace.h"
   4
   5 #define DEBUG_INT1A
   6
   7 #define SUCCESSFUL              0x00
   8 #define DEVICE_NOT_FOUND        0x86
   9 #define BAD_REGISTER_NUMBER     0x87
  10
  11 void x86emu_dump_xregs(void);
  12 extern int verbose;
  13
  14
  15 int int1A_handler()
  16 {
  17         PCITAG tag;
  18         pciVideoPtr pvp = NULL;
  19
  20         if (verbose) {
  21                 printf("\nint1a encountered.\n");
  22                 //x86emu_dump_xregs();
  23         }
  24
  25         switch (X86_AX) {
  26         case 0xb101:
  27                 X86_EAX = 0x00; /* no config space/special cycle support */
  28                 X86_AL = 0x01;  /* config mechanism 1 */
  29                 X86_EDX = 0x20494350;   /* " ICP" */
  30                 X86_EBX = 0x0210;       /* Version 2.10 */
  31                 X86_ECX &= 0xFF00;
  32                 X86_ECX |= (pciNumBuses & 0xFF);        /* Max bus number in system */
  33                 X86_EFLAGS &= ~((unsigned long) 0x01);  /* clear carry flag */
  34 #ifdef DEBUG_INT1A
  35                 if (verbose)
  36                         printf("PCI bios present.\n");
  37 #endif
  38                 return 1;
  39         case 0xb102:
  40                 if (X86_DX == pvp->vendor_id && X86_CX == pvp->device_id && X86_ESI == 0) {
  41                         X86_EAX = X86_AL | (SUCCESSFUL << 8);
  42                         X86_EFLAGS &= ~((unsigned long) 0x01);  /* clear carry flag */
  43                         X86_EBX = pciSlotBX(pvp);
  44                 }
  45 #ifdef SHOW_ALL_DEVICES
  46                 else if ((pvp = xf86FindPciDeviceVendor(X86_EDX, X86_ECX, X86_ESI, pvp))) {
  47                         X86_EAX = X86_AL | (SUCCESSFUL << 8);
  48                         X86_EFLAGS &= ~((unsigned long) 0x01);  /* clear carry flag */
  49                         X86_EBX = pciSlotBX(pvp);
  50                 }
  51 #endif
  52                 else {
  53                         X86_EAX = X86_AL | (DEVICE_NOT_FOUND << 8);
  54                         X86_EFLAGS |= ((unsigned long) 0x01);   /* set carry flag */
  55                 }
  56 #ifdef DEBUG_INT1A
  57                 printf("eax=0x%x ebx=0x%x eflags=0x%x\n", X86_EAX, X86_EBX, X86_EFLAGS);
  58 #endif
  59                 return 1;
  60         case 0xb103:
  61 #if 0
  62                 if (X86_CL == pvp->interface &&
  63                     X86_CH == pvp->subclass &&
  64                     ((X86_ECX & 0xFFFF0000) >> 16) == pvp->class) {
  65                         X86_EAX = X86_AL | (SUCCESSFUL << 8);
  66                         X86_EBX = pciSlotBX(pvp);
  67                         X86_EFLAGS &= ~((unsigned long) 0x01);  /* clear carry flag */
  68                 }
  69 #else
  70                 /* FIXME: dirty hack */
  71                 if (0);
  72 #endif
  73 #ifdef SHOW_ALL_DEVICES
  74                 else if ((pvp = FindPciClass(X86_CL, X86_CH,
  75                                              (X86_ECX & 0xffff0000) >> 16,
  76                                              X86_ESI, pvp))) {
  77                         X86_EAX = X86_AL | (SUCCESSFUL << 8);
  78                         X86_EFLAGS &= ~((unsigned long) 0x01);  /* clear carry flag */
  79                         X86_EBX = pciSlotBX(pvp);
  80                 }
  81 #endif
  82                 else {
  83                         X86_EAX = X86_AL | (DEVICE_NOT_FOUND << 8);
  84                         X86_EFLAGS |= ((unsigned long) 0x01);   /* set carry flag */
  85                 }
  86 #ifdef DEBUG_INT1A
  87                 printf("eax=0x%x eflags=0x%x\n", X86_EAX, X86_EFLAGS);
  88 #endif
  89                 return 1;
  90         case 0xb108:
  91                 if ((tag = findPci(X86_EBX))) {
  92                         X86_CL = pciReadByte(tag, X86_EDI);
  93                         X86_EAX = X86_AL | (SUCCESSFUL << 8);
  94                         X86_EFLAGS &= ~((unsigned long) 0x01);  /* clear carry flag */
  95                 } else {
  96                         X86_EAX = X86_AL | (BAD_REGISTER_NUMBER << 8);
  97                         X86_EFLAGS |= ((unsigned long) 0x01);   /* set carry flag */
  98                 }
  99 #ifdef DEBUG_INT1A
 100                 printf("eax=0x%x ecx=0x%x eflags=0x%x\n", X86_EAX, X86_ECX, X86_EFLAGS);
 101 #endif
 102                 return 1;
 103         case 0xb109:
 104                 if ((tag = findPci(X86_EBX))) {
 105                         X86_CX = pciReadWord(tag, X86_EDI);
 106                         X86_EAX = X86_AL | (SUCCESSFUL << 8);
 107                         X86_EFLAGS &= ~((unsigned long) 0x01);  /* clear carry flag */
 108                 } else {
 109                         X86_EAX = X86_AL | (BAD_REGISTER_NUMBER << 8);
 110                         X86_EFLAGS |= ((unsigned long) 0x01);   /* set carry flag */
 111                 }
 112 #ifdef DEBUG_INT1A
 113                 printf("eax=0x%x ecx=0x%x eflags=0x%x\n", X86_EAX, X86_ECX, X86_EFLAGS);
 114 #endif
 115                 return 1;
 116         case 0xb10a:
 117                 if ((tag = findPci(X86_EBX))) {
 118                         X86_ECX = pciReadLong(tag, X86_EDI);
 119                         X86_EAX = X86_AL | (SUCCESSFUL << 8);
 120                         X86_EFLAGS &= ~((unsigned long) 0x01);  /* clear carry flag */
 121                 } else {
 122                         X86_EAX = X86_AL | (BAD_REGISTER_NUMBER << 8);
 123                         X86_EFLAGS |= ((unsigned long) 0x01);   /* set carry flag */
 124                 }
 125 #ifdef DEBUG_INT1A
 126                 printf("eax=0x%x ecx=0x%x eflags=0x%x\n", X86_EAX, X86_ECX, X86_EFLAGS);
 127 #endif
 128                 return 1;
 129         case 0xb10b:
 130                 if ((tag = findPci(X86_EBX))) {
 131                         pciWriteByte(tag, X86_EDI, X86_CL);
 132                         X86_EAX = X86_AL | (SUCCESSFUL << 8);
 133                         X86_EFLAGS &= ~((unsigned long) 0x01);  /* clear carry flag */
 134                 } else {
 135                         X86_EAX = X86_AL | (BAD_REGISTER_NUMBER << 8);
 136                         X86_EFLAGS |= ((unsigned long) 0x01);   /* set carry flag */
 137                 }
 138 #ifdef DEBUG_INT1A
 139                 printf("eax=0x%x eflags=0x%x\n", X86_EAX, X86_EFLAGS);
 140 #endif
 141                 return 1;
 142         case 0xb10c:
 143                 if ((tag = findPci(X86_EBX))) {
 144                         pciWriteWord(tag, X86_EDI, X86_CX);
 145                         X86_EAX = X86_AL | (SUCCESSFUL << 8);
 146                         X86_EFLAGS &= ~((unsigned long) 0x01);  /* clear carry flag */
 147                 } else {
 148                         X86_EAX = X86_AL | (BAD_REGISTER_NUMBER << 8);
 149                         X86_EFLAGS |= ((unsigned long) 0x01);   /* set carry flag */
 150                 }
 151 #ifdef DEBUG_INT1A
 152                 printf("eax=0x%x eflags=0x%x\n", X86_EAX, X86_EFLAGS);
 153 #endif
 154                 return 1;
 155         case 0xb10d:
 156                 if ((tag = findPci(X86_EBX))) {
 157                         pciWriteLong(tag, X86_EDI, X86_ECX);
 158                         X86_EAX = X86_AL | (SUCCESSFUL << 8);
 159                         X86_EFLAGS &= ~((unsigned long) 0x01);  /* clear carry flag */
 160                 } else {
 161                         X86_EAX = X86_AL | (BAD_REGISTER_NUMBER << 8);
 162                         X86_EFLAGS |= ((unsigned long) 0x01);   /* set carry flag */
 163                 }
 164 #ifdef DEBUG_INT1A
 165                 printf("eax=0x%x eflags=0x%x\n", X86_EAX, X86_EFLAGS);
 166 #endif
 167                 return 1;
 168         default:
 169                 printf("int1a: subfunction not implemented.\n");
 170                 return 0;
 171         }
 172 }