diff options
Diffstat (limited to 'util/vgabios/int1a.c')
| -rw-r--r-- | util/vgabios/int1a.c | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/util/vgabios/int1a.c b/util/vgabios/int1a.c new file mode 100644 index 0000000000..48aa13e9a1 --- /dev/null +++ b/util/vgabios/int1a.c @@ -0,0 +1,172 @@ +#include <stdio.h> +#include "test.h" +#include "pci-userspace.h" + +#define DEBUG_INT1A + +#define SUCCESSFUL 0x00 +#define DEVICE_NOT_FOUND 0x86 +#define BAD_REGISTER_NUMBER 0x87 + +void x86emu_dump_xregs(void); +extern int verbose; + + +int int1A_handler() +{ + PCITAG tag; + pciVideoPtr pvp = NULL; + + if (verbose) { + printf("\nint1a encountered.\n"); + x86emu_dump_xregs(); + } + + switch (X86_AX) { + case 0xb101: + X86_EAX = 0x00; /* no config space/special cycle support */ + X86_AL = 0x01; /* config mechanism 1 */ + X86_EDX = 0x20494350; /* " ICP" */ + X86_EBX = 0x0210; /* Version 2.10 */ + X86_ECX &= 0xFF00; + X86_ECX |= (pciNumBuses & 0xFF); /* Max bus number in system */ + X86_EFLAGS &= ~((unsigned long) 0x01); /* clear carry flag */ +#ifdef DEBUG_INT1A + if (verbose) + printf("PCI bios present.\n"); +#endif + return 1; + case 0xb102: + if (X86_DX == pvp->vendor_id && X86_CX == pvp->device_id && X86_ESI == 0) { + X86_EAX = X86_AL | (SUCCESSFUL << 8); + X86_EFLAGS &= ~((unsigned long) 0x01); /* clear carry flag */ + X86_EBX = pciSlotBX(pvp); + } +#ifdef SHOW_ALL_DEVICES + else if ((pvp = xf86FindPciDeviceVendor(X86_EDX, X86_ECX, X86_ESI, pvp))) { + X86_EAX = X86_AL | (SUCCESSFUL << 8); + X86_EFLAGS &= ~((unsigned long) 0x01); /* clear carry flag */ + X86_EBX = pciSlotBX(pvp); + } +#endif + else { + X86_EAX = X86_AL | (DEVICE_NOT_FOUND << 8); + X86_EFLAGS |= ((unsigned long) 0x01); /* set carry flag */ + } +#ifdef DEBUG_INT1A + printf("eax=0x%x ebx=0x%x eflags=0x%x\n", X86_EAX, X86_EBX, X86_EFLAGS); +#endif + return 1; + case 0xb103: +#if 0 + if (X86_CL == pvp->interface && + X86_CH == pvp->subclass && + ((X86_ECX & 0xFFFF0000) >> 16) == pvp->class) { + X86_EAX = X86_AL | (SUCCESSFUL << 8); + X86_EBX = pciSlotBX(pvp); + X86_EFLAGS &= ~((unsigned long) 0x01); /* clear carry flag */ + } +#else + /* FIXME: dirty hack */ + if (0); +#endif +#ifdef SHOW_ALL_DEVICES + else if ((pvp = FindPciClass(X86_CL, X86_CH, + (X86_ECX & 0xffff0000) >> 16, + X86_ESI, pvp))) { + X86_EAX = X86_AL | (SUCCESSFUL << 8); + X86_EFLAGS &= ~((unsigned long) 0x01); /* clear carry flag */ + X86_EBX = pciSlotBX(pvp); + } +#endif + else { + X86_EAX = X86_AL | (DEVICE_NOT_FOUND << 8); + X86_EFLAGS |= ((unsigned long) 0x01); /* set carry flag */ + } +#ifdef DEBUG_INT1A + printf("eax=0x%x eflags=0x%x\n", X86_EAX, X86_EFLAGS); +#endif + return 1; + case 0xb108: + if ((tag = findPci(X86_EBX))) { + X86_CL = pciReadByte(tag, X86_EDI); + X86_EAX = X86_AL | (SUCCESSFUL << 8); + X86_EFLAGS &= ~((unsigned long) 0x01); /* clear carry flag */ + } else { + X86_EAX = X86_AL | (BAD_REGISTER_NUMBER << 8); + X86_EFLAGS |= ((unsigned long) 0x01); /* set carry flag */ + } +#ifdef DEBUG_INT1A + printf("eax=0x%x ecx=0x%x eflags=0x%x\n", X86_EAX, X86_ECX, X86_EFLAGS); +#endif + return 1; + case 0xb109: + if ((tag = findPci(X86_EBX))) { + X86_CX = pciReadWord(tag, X86_EDI); + X86_EAX = X86_AL | (SUCCESSFUL << 8); + X86_EFLAGS &= ~((unsigned long) 0x01); /* clear carry flag */ + } else { + X86_EAX = X86_AL | (BAD_REGISTER_NUMBER << 8); + X86_EFLAGS |= ((unsigned long) 0x01); /* set carry flag */ + } +#ifdef DEBUG_INT1A + printf("eax=0x%x ecx=0x%x eflags=0x%x\n", X86_EAX, X86_ECX, X86_EFLAGS); +#endif + return 1; + case 0xb10a: + if ((tag = findPci(X86_EBX))) { + X86_ECX = pciReadLong(tag, X86_EDI); + X86_EAX = X86_AL | (SUCCESSFUL << 8); + X86_EFLAGS &= ~((unsigned long) 0x01); /* clear carry flag */ + } else { + X86_EAX = X86_AL | (BAD_REGISTER_NUMBER << 8); + X86_EFLAGS |= ((unsigned long) 0x01); /* set carry flag */ + } +#ifdef DEBUG_INT1A + printf("eax=0x%x ecx=0x%x eflags=0x%x\n", X86_EAX, X86_ECX, X86_EFLAGS); +#endif + return 1; + case 0xb10b: + if ((tag = findPci(X86_EBX))) { + pciWriteByte(tag, X86_EDI, X86_CL); + X86_EAX = X86_AL | (SUCCESSFUL << 8); + X86_EFLAGS &= ~((unsigned long) 0x01); /* clear carry flag */ + } else { + X86_EAX = X86_AL | (BAD_REGISTER_NUMBER << 8); + X86_EFLAGS |= ((unsigned long) 0x01); /* set carry flag */ + } +#ifdef DEBUG_INT1A + printf("eax=0x%x eflags=0x%x\n", X86_EAX, X86_EFLAGS); +#endif + return 1; + case 0xb10c: + if ((tag = findPci(X86_EBX))) { + pciWriteWord(tag, X86_EDI, X86_CX); + X86_EAX = X86_AL | (SUCCESSFUL << 8); + X86_EFLAGS &= ~((unsigned long) 0x01); /* clear carry flag */ + } else { + X86_EAX = X86_AL | (BAD_REGISTER_NUMBER << 8); + X86_EFLAGS |= ((unsigned long) 0x01); /* set carry flag */ + } +#ifdef DEBUG_INT1A + printf("eax=0x%x eflags=0x%x\n", X86_EAX, X86_EFLAGS); +#endif + return 1; + case 0xb10d: + if ((tag = findPci(X86_EBX))) { + pciWriteLong(tag, X86_EDI, X86_ECX); + X86_EAX = X86_AL | (SUCCESSFUL << 8); + X86_EFLAGS &= ~((unsigned long) 0x01); /* clear carry flag */ + } else { + X86_EAX = X86_AL | (BAD_REGISTER_NUMBER << 8); + X86_EFLAGS |= ((unsigned long) 0x01); /* set carry flag */ + } +#ifdef DEBUG_INT1A + printf("eax=0x%x eflags=0x%x\n", X86_EAX, X86_EFLAGS); +#endif + return 1; + default: + printf("int1a: subfunction not implemented.\n"); + return 0; + } +} |