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/* $XFree86: xc/programs/Xserver/hw/xfree86/int10/xf86int10.c,v 1.5 2000/04/04 19:25:18 dawes Exp $ */
/*
* XFree86 int10 module
* execute BIOS int 10h calls in x86 real mode environment
* Copyright 1999 Egbert Eich
*/
#include "xf86.h"
#include "xf86str.h"
#include "xf86_ansic.h"
#include "compiler.h"
#include "xf86Pci.h"
#define _INT10_PRIVATE
#include "xf86int10.h"
#include "int10Defines.h"
xf86Int10InfoPtr Int10Current = NULL;
static int int1A_handler(xf86Int10InfoPtr pInt);
static int int42_handler(xf86Int10InfoPtr pInt);
static int intE6_handler(xf86Int10InfoPtr pInt);
static PCITAG findPci(unsigned short bx);
static CARD32 pciSlotBX(pciVideoPtr pvp);
int
int_handler(xf86Int10InfoPtr pInt)
{
int num = pInt->num;
switch (num) {
case 0x10:
case 0x42:
if (!(int42_handler(pInt)))
goto bios_handler;
else return 1;
case 0x1A:
if(!(int1A_handler(pInt)))
goto bios_handler;
else return 1;
case 0xe6:
if (!(intE6_handler(pInt)))
goto bios_handler;
else return 1;
default:
goto bios_handler;
}
bios_handler:
return run_bios_int(num,pInt);
}
/*
* The system-BIOS provides int10 ax=1200 and ax=1201 functions
* before the video bios is installed. The int10_handler below
* provides these functions, too. However there have been cases
* in which disabling generic video has caused problems. Therefore
* it has been disabled by default. To reenable it do:
* #define DO_GENERIC_INT10
*/
static int
int42_handler(xf86Int10InfoPtr pInt)
{
#define REG pInt
#ifdef DO_GENERIC_INT10
unsigned char c;
#endif
int num = pInt->num;
#ifdef PRINT_INT
ErrorF("int 0x%x: ax:0x%x bx:0x%x cx:0x%x dx:0x%x\n",num,
X86_EAX,X86_EBX,X86_ECX,X86_EDX);
#endif
/*
* video bios has modified these -
* leave it to the video bios to do this
*/
if (getIntVect(pInt,num) != I_S_DEFAULT_INT_VECT) {
return 0;
}
if ((X86_EBX & 0xff) == 0x32) {
switch (X86_EAX & 0xFFFF) {
case 0x1200:
#ifdef PRINT_INT
ErrorF("enabling video\n");
#endif
#ifdef DO_GENERIC_INT10
c = inb(0x3cc);
c |= 0x02;
outb(0x3c2,c);
#endif
return 1;
case 0x1201:
#ifdef PRINT_INT
ErrorF("disabling video\n");
#endif
#ifdef DO_GENERIC_INT10
c = inb(0x3cc);
c &= ~0x02;
outb(0x3c2,c);
#endif
return 1;
default:
break;
}
}
if (num == 0x42)
return 1;
else
return 0;
}
#define SUCCESSFUL 0x00
#define DEVICE_NOT_FOUND 0x86
#define BAD_REGISTER_NUMBER 0x87
static int
int1A_handler(xf86Int10InfoPtr pInt)
{
PCITAG tag;
pciVideoPtr pvp;
if (! (pvp = xf86GetPciInfoForEntity(pInt->entityIndex)))
return 0; /* oops */
#ifdef PRINT_INT
ErrorF("int 0x1a: ax=0x%x bx=0x%x cx=0x%x dx=0x%x di=0x%x es=0x%x\n",
X86_EAX,X86_EBX,X86_ECX,X86_EDX,X86_EDI,X86_ESI);
#endif
switch (X86_EAX & 0xFFFF) {
case 0xb101:
X86_EAX &= 0xFF00; /* no config space/special cycle support */
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 PRINT_INT
ErrorF("ax=0x%x dx=0x%x bx=0x%x cx=0x%x flags=0x%x\n",
X86_EAX,X86_EDX,X86_EBX,X86_ECX,X86_EFLAGS);
#endif
return 1;
case 0xb102:
if ((X86_EDX & 0xFFFF) == pvp->vendor &&
(X86_ECX & 0xFFFF) ==pvp->chipType &&
X86_ESI == 0) {
X86_EAX = (X86_EAX & 0x00FF) | (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))
!= NULL) {
X86_EAX = (X86_EAX & 0x00FF) | (SUCCESSFUL << 8);
X86_EFLAGS &= ~((unsigned long)0x01); /* clear carry flag */
X86_EBX = pciSlotBX(pvp);
}
#endif
else {
X86_EAX = (X86_EAX & 0x00FF) | (DEVICE_NOT_FOUND << 8);
X86_EFLAGS |= ((unsigned long)0x01); /* set carry flag */
}
#ifdef PRINT_INT
ErrorF("ax=0x%x bx=0x%x flags=0x%x\n",
X86_EAX,X86_EBX,X86_EFLAGS);
#endif
return 1;
case 0xb103:
if ((X86_ECX & 0xFF) == pvp->interface &&
((X86_ECX & 0xFF00) >> 8) == pvp->subclass &&
((X86_ECX & 0xFFFF0000) >> 16) == pvp->class) {
X86_EAX = (X86_EAX & 0x00FF) | (SUCCESSFUL << 8);
X86_EBX = pciSlotBX(pvp);
X86_EFLAGS &= ~((unsigned long)0x01); /* clear carry flag */
}
#ifdef SHOW_ALL_DEVICES
else if ((pvp = xf86FindPciClass(X86_ECX & 0xFF,
(X86_ECX & 0xff00) >> 8,
(X86_ECX & 0xffff0000) >> 16,
X86_ESI,pvp))!= NULL) {
X86_EAX = (X86_EAX & 0x00FF) | (SUCCESSFUL << 8);
X86_EFLAGS &= ~((unsigned long)0x01); /* clear carry flag */
X86_EBX = pciSlotBX(pvp);
}
#endif
else {
X86_EAX = (X86_EAX & 0x00FF) | (DEVICE_NOT_FOUND << 8);
X86_EFLAGS |= ((unsigned long)0x01); /* set carry flag */
}
#ifdef PRINT_INT
ErrorF("ax=0x%x flags=0x%x\n",X86_EAX,X86_EFLAGS);
#endif
return 1;
case 0xb108:
if ((tag = findPci(X86_EBX))) {
X86_ECX &= 0xFFFFFF00;
X86_ECX |= pciReadByte(tag,X86_EDI);
X86_EAX = (X86_EAX & 0x00FF) | (SUCCESSFUL << 8);
X86_EFLAGS &= ~((unsigned long)0x01); /* clear carry flag */
} else {
X86_EAX = (X86_EAX & 0x00FF) | (BAD_REGISTER_NUMBER << 8);
X86_EFLAGS |= ((unsigned long)0x01); /* set carry flag */
}
#ifdef PRINT_INT
ErrorF("ax=0x%x cx=0x%x flags=0x%x\n",
X86_EAX,X86_ECX,X86_EFLAGS);
#endif
return 1;
case 0xb109:
if ((tag = findPci(X86_EBX))) {
X86_ECX &= 0xFFFF0000;
X86_ECX |= pciReadWord(tag,X86_EDI);
X86_EAX = (X86_EAX & 0x00FF) | (SUCCESSFUL << 8);
X86_EFLAGS &= ~((unsigned long)0x01); /* clear carry flag */
} else {
X86_EAX = (X86_EAX & 0x00FF) | (BAD_REGISTER_NUMBER << 8);
X86_EFLAGS |= ((unsigned long)0x01); /* set carry flag */
}
#ifdef PRINT_INT
ErrorF("ax=0x%x cx=0x%x flags=0x%x\n",
X86_EAX,X86_ECX,X86_EFLAGS);
#endif
return 1;
case 0xb10a:
if ((tag = findPci(X86_EBX))) {
X86_ECX &= 0;
X86_ECX |= pciReadLong(tag, X86_EDI);
X86_EAX = (X86_EAX & 0x00FF) | (SUCCESSFUL << 8);
X86_EFLAGS &= ~((unsigned long)0x01); /* clear carry flag */
} else {
X86_EAX = (X86_EAX & 0x00FF) | (BAD_REGISTER_NUMBER << 8);
X86_EFLAGS |= ((unsigned long)0x01); /* set carry flag */
}
#ifdef PRINT_INT
ErrorF("ax=0x%x cx=0x%x flags=0x%x\n",
X86_EAX,X86_ECX,X86_EFLAGS);
#endif
return 1;
case 0xb10b:
if ((tag = findPci(X86_EBX))) {
pciWriteByte(tag,X86_EDI,(CARD8)X86_ECX);
X86_EAX = (X86_EAX & 0x00FF) | (SUCCESSFUL << 8);
X86_EFLAGS &= ~((unsigned long)0x01); /* clear carry flag */
} else {
X86_EAX = (X86_EAX & 0x00FF) | (BAD_REGISTER_NUMBER << 8);
X86_EFLAGS |= ((unsigned long)0x01); /* set carry flag */
}
#ifdef PRINT_INT
ErrorF("ax=0x%x flags=0x%x\n", X86_EAX,X86_EFLAGS);
#endif
return 1;
case 0xb10c:
if ((tag = findPci(X86_EBX))) {
pciWriteWord(tag,X86_EDI,(CARD16)X86_ECX);
X86_EAX = (X86_EAX & 0x00FF) | (SUCCESSFUL << 8);
X86_EFLAGS &= ~((unsigned long)0x01); /* clear carry flag */
} else {
X86_EAX = (X86_EAX & 0x00FF) | (BAD_REGISTER_NUMBER << 8);
X86_EFLAGS |= ((unsigned long)0x01); /* set carry flag */
}
#ifdef PRINT_INT
ErrorF("ax=0x%x flags=0x%x\n", X86_EAX,X86_EFLAGS);
#endif
return 1;
case 0xb10d:
if ((tag = findPci(X86_EBX))) {
pciWriteLong(tag,X86_EDI,(CARD32)X86_ECX);
X86_EAX = (X86_EAX & 0x00FF) | (SUCCESSFUL << 8);
X86_EFLAGS &= ~((unsigned long)0x01); /* clear carry flag */
} else {
X86_EAX = (X86_EAX & 0x00FF) | (BAD_REGISTER_NUMBER << 8);
X86_EFLAGS |= ((unsigned long)0x01); /* set carry flag */
}
#ifdef PRINT_INT
ErrorF("ax=0x%x flags=0x%x\n", X86_EAX,X86_EFLAGS);
#endif
return 1;
default:
return 0;
}
}
static PCITAG
findPci(unsigned short bx)
{
int bus = (bx >> 8) & 0xFF;
int dev = (bx >> 3) & 0x1F;
int func = bx & 0x7;
if (xf86IsPciDevPresent(bus,dev,func))
return pciTag(bus,dev,func);
return 0;
}
static CARD32
pciSlotBX(pciVideoPtr pvp)
{
return ((pvp->bus << 8) | (pvp->device << 3) | (pvp->func));
}
/*
* handle initialization
*/
static int
intE6_handler(xf86Int10InfoPtr pInt)
{
pciVideoPtr pvp;
if ((pvp = xf86GetPciInfoForEntity(pInt->entityIndex))) {
X86_AX = (CARD16)(((pvp->bus) << 8)
| (pvp->device << 3) | (pvp->func & 0x7));
}
pushw(pInt,X86_CS);
pushw(pInt,(CARD16)X86_EIP);
X86_CS = pInt->BIOSseg;
X86_EIP = 0x0003;
X86_ES = 0; /* standard pc es */
return 1;
}
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