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Diffstat (limited to 'board/MAI/bios_emulator/scitech/src/common/vesavbe.c')
-rw-r--r--board/MAI/bios_emulator/scitech/src/common/vesavbe.c506
1 files changed, 253 insertions, 253 deletions
diff --git a/board/MAI/bios_emulator/scitech/src/common/vesavbe.c b/board/MAI/bios_emulator/scitech/src/common/vesavbe.c
index 2be57e2bd..a669e5c29 100644
--- a/board/MAI/bios_emulator/scitech/src/common/vesavbe.c
+++ b/board/MAI/bios_emulator/scitech/src/common/vesavbe.c
@@ -73,10 +73,10 @@ void VBEAPI VBE_init(void)
****************************************************************************/
{
if (!state->VESABuf_ptr) {
- /* Allocate a global buffer for communicating with the VESA VBE */
- if ((state->VESABuf_ptr = PM_getVESABuf(&VESABuf_len, &state->VESABuf_rseg, &state->VESABuf_roff)) == NULL)
- PM_fatalError("VESAVBE.C: Real mode memory allocation failed!");
- }
+ /* Allocate a global buffer for communicating with the VESA VBE */
+ if ((state->VESABuf_ptr = PM_getVESABuf(&VESABuf_len, &state->VESABuf_rseg, &state->VESABuf_roff)) == NULL)
+ PM_fatalError("VESAVBE.C: Real mode memory allocation failed!");
+ }
}
void * VBEAPI VBE_getRMBuf(uint *len,uint *rseg,uint *roff)
@@ -129,7 +129,7 @@ void VBEAPI VBE_callESDI(RMREGS *regs, void *buffer, int size)
RMSREGS sregs;
if (!state->VESABuf_ptr)
- PM_fatalError("You *MUST* call VBE_init() before you can call the VESAVBE.C module!");
+ PM_fatalError("You *MUST* call VBE_init() before you can call the VESAVBE.C module!");
sregs.es = (ushort)state->VESABuf_rseg;
regs->x.di = (ushort)state->VESABuf_roff;
memcpy(state->VESABuf_ptr, buffer, size);
@@ -157,7 +157,7 @@ static char *VBE_copyStrToLocal(char *p,char *realPtr,char *max)
v = PM_mapRealPointer((uint)((ulong)realPtr >> 16), (uint)((ulong)realPtr & 0xFFFF));
while (*v != 0 && p < max)
- *p++ = *v++;
+ *p++ = *v++;
*p++ = 0;
return p;
}
@@ -178,7 +178,7 @@ static void VBE_copyShortToLocal(ushort *p,ushort *realPtr)
v = PM_mapRealPointer((uint)((ulong)realPtr >> 16),(uint)((ulong)realPtr & 0xFFFF));
while (*v != 0xFFFF)
- *p++ = *v++;
+ *p++ = *v++;
*p = 0xFFFF;
}
#endif
@@ -200,26 +200,26 @@ int VBEAPI VBE_detectEXT(VBE_vgaInfo *vgaInfo,ibool forceUniVBE)
regs.x.ax = 0x4F00; /* Get SuperVGA information */
if (forceUniVBE) {
- regs.x.bx = 0x1234;
- regs.x.cx = 0x4321;
- }
+ regs.x.bx = 0x1234;
+ regs.x.cx = 0x4321;
+ }
else {
- regs.x.bx = 0;
- regs.x.cx = 0;
- }
+ regs.x.bx = 0;
+ regs.x.cx = 0;
+ }
strncpy(vgaInfo->VESASignature,"VBE2",4);
VBE_callESDI(&regs, vgaInfo, sizeof(*vgaInfo));
if (regs.x.ax != VBE_SUCCESS)
- return 0;
+ return 0;
if (strncmp(vgaInfo->VESASignature,"VESA",4) != 0)
- return 0;
+ return 0;
/* Check for bogus BIOSes that return a VBE version number that is
* not correct, and fix it up. We also check the OemVendorNamePtr for a
* valid value, and if it is invalid then we also reset to VBE 1.2.
*/
if (vgaInfo->VESAVersion >= 0x200 && vgaInfo->OemVendorNamePtr == 0)
- vgaInfo->VESAVersion = 0x102;
+ vgaInfo->VESAVersion = 0x102;
#ifndef REALMODE
/* Relocate all the indirect information (mode tables, OEM strings
* etc) from the low 1Mb memory region into a static buffer in
@@ -227,23 +227,23 @@ int VBEAPI VBE_detectEXT(VBE_vgaInfo *vgaInfo,ibool forceUniVBE)
* from mapping the strings from real mode to protected mode.
*/
{
- char *p,*p2;
+ char *p,*p2;
p2 = VBE_copyStrToLocal(localBuf,vgaInfo->OemStringPtr,MAX_LOCAL_BUF);
vgaInfo->OemStringPtr = localBuf;
if (vgaInfo->VESAVersion >= 0x200) {
- p = VBE_copyStrToLocal(p2,vgaInfo->OemVendorNamePtr,MAX_LOCAL_BUF);
- vgaInfo->OemVendorNamePtr = p2;
- p2 = VBE_copyStrToLocal(p,vgaInfo->OemProductNamePtr,MAX_LOCAL_BUF);
- vgaInfo->OemProductNamePtr = p;
- p = VBE_copyStrToLocal(p2,vgaInfo->OemProductRevPtr,MAX_LOCAL_BUF);
- vgaInfo->OemProductRevPtr = p2;
- VBE_copyShortToLocal((ushort*)p,vgaInfo->VideoModePtr);
- vgaInfo->VideoModePtr = (ushort*)p;
- }
+ p = VBE_copyStrToLocal(p2,vgaInfo->OemVendorNamePtr,MAX_LOCAL_BUF);
+ vgaInfo->OemVendorNamePtr = p2;
+ p2 = VBE_copyStrToLocal(p,vgaInfo->OemProductNamePtr,MAX_LOCAL_BUF);
+ vgaInfo->OemProductNamePtr = p;
+ p = VBE_copyStrToLocal(p2,vgaInfo->OemProductRevPtr,MAX_LOCAL_BUF);
+ vgaInfo->OemProductRevPtr = p2;
+ VBE_copyShortToLocal((ushort*)p,vgaInfo->VideoModePtr);
+ vgaInfo->VideoModePtr = (ushort*)p;
+ }
else {
- VBE_copyShortToLocal((ushort*)p2,vgaInfo->VideoModePtr);
- vgaInfo->VideoModePtr = (ushort*)p2;
- }
+ VBE_copyShortToLocal((ushort*)p2,vgaInfo->VideoModePtr);
+ vgaInfo->VideoModePtr = (ushort*)p2;
+ }
}
#endif
state->VBEMemory = vgaInfo->TotalMemory * 64;
@@ -253,17 +253,17 @@ int VBEAPI VBE_detectEXT(VBE_vgaInfo *vgaInfo,ibool forceUniVBE)
*/
haveRiva128 = false;
if (vgaInfo->VESAVersion >= 0x300 &&
- (strstr(vgaInfo->OemStringPtr,"NVidia") != NULL ||
- strstr(vgaInfo->OemStringPtr,"Riva") != NULL)) {
- haveRiva128 = true;
- }
+ (strstr(vgaInfo->OemStringPtr,"NVidia") != NULL ||
+ strstr(vgaInfo->OemStringPtr,"Riva") != NULL)) {
+ haveRiva128 = true;
+ }
/* Check for Matrox G400 cards which claim to be VBE 3.0
* compliant yet they don't implement the refresh rate control
* functions.
*/
if (vgaInfo->VESAVersion >= 0x300 && (strcmp(vgaInfo->OemProductNamePtr,"Matrox G400") == 0))
- vgaInfo->VESAVersion = 0x200;
+ vgaInfo->VESAVersion = 0x200;
return (state->VBEVersion = vgaInfo->VESAVersion);
}
@@ -305,70 +305,70 @@ ibool VBEAPI VBE_getModeInfo(int mode,VBE_modeInfo *modeInfo)
regs.x.cx = (ushort)mode;
VBE_callESDI(&regs, modeInfo, sizeof(*modeInfo));
if (regs.x.ax != VBE_SUCCESS)
- return false;
+ return false;
if ((modeInfo->ModeAttributes & vbeMdAvailable) == 0)
- return false;
+ return false;
/* Map out triple buffer and stereo flags for NVidia Riva128
* chips.
*/
if (haveRiva128) {
- modeInfo->ModeAttributes &= ~vbeMdTripleBuf;
- modeInfo->ModeAttributes &= ~vbeMdStereo;
- }
+ modeInfo->ModeAttributes &= ~vbeMdTripleBuf;
+ modeInfo->ModeAttributes &= ~vbeMdStereo;
+ }
/* Support old style RGB definitions for VBE 1.1 BIOSes */
bits = modeInfo->BitsPerPixel;
if (modeInfo->MemoryModel == vbeMemPK && bits > 8) {
- modeInfo->MemoryModel = vbeMemRGB;
- switch (bits) {
- case 15:
- modeInfo->RedMaskSize = 5;
- modeInfo->RedFieldPosition = 10;
- modeInfo->GreenMaskSize = 5;
- modeInfo->GreenFieldPosition = 5;
- modeInfo->BlueMaskSize = 5;
- modeInfo->BlueFieldPosition = 0;
- modeInfo->RsvdMaskSize = 1;
- modeInfo->RsvdFieldPosition = 15;
- break;
- case 16:
- modeInfo->RedMaskSize = 5;
- modeInfo->RedFieldPosition = 11;
- modeInfo->GreenMaskSize = 5;
- modeInfo->GreenFieldPosition = 5;
- modeInfo->BlueMaskSize = 5;
- modeInfo->BlueFieldPosition = 0;
- modeInfo->RsvdMaskSize = 0;
- modeInfo->RsvdFieldPosition = 0;
- break;
- case 24:
- modeInfo->RedMaskSize = 8;
- modeInfo->RedFieldPosition = 16;
- modeInfo->GreenMaskSize = 8;
- modeInfo->GreenFieldPosition = 8;
- modeInfo->BlueMaskSize = 8;
- modeInfo->BlueFieldPosition = 0;
- modeInfo->RsvdMaskSize = 0;
- modeInfo->RsvdFieldPosition = 0;
- break;
- }
- }
+ modeInfo->MemoryModel = vbeMemRGB;
+ switch (bits) {
+ case 15:
+ modeInfo->RedMaskSize = 5;
+ modeInfo->RedFieldPosition = 10;
+ modeInfo->GreenMaskSize = 5;
+ modeInfo->GreenFieldPosition = 5;
+ modeInfo->BlueMaskSize = 5;
+ modeInfo->BlueFieldPosition = 0;
+ modeInfo->RsvdMaskSize = 1;
+ modeInfo->RsvdFieldPosition = 15;
+ break;
+ case 16:
+ modeInfo->RedMaskSize = 5;
+ modeInfo->RedFieldPosition = 11;
+ modeInfo->GreenMaskSize = 5;
+ modeInfo->GreenFieldPosition = 5;
+ modeInfo->BlueMaskSize = 5;
+ modeInfo->BlueFieldPosition = 0;
+ modeInfo->RsvdMaskSize = 0;
+ modeInfo->RsvdFieldPosition = 0;
+ break;
+ case 24:
+ modeInfo->RedMaskSize = 8;
+ modeInfo->RedFieldPosition = 16;
+ modeInfo->GreenMaskSize = 8;
+ modeInfo->GreenFieldPosition = 8;
+ modeInfo->BlueMaskSize = 8;
+ modeInfo->BlueFieldPosition = 0;
+ modeInfo->RsvdMaskSize = 0;
+ modeInfo->RsvdFieldPosition = 0;
+ break;
+ }
+ }
/* Convert the 32k direct color modes of VBE 1.2+ BIOSes to
* be recognised as 15 bits per pixel modes.
*/
if (bits == 16 && modeInfo->RsvdMaskSize == 1)
- modeInfo->BitsPerPixel = 15;
+ modeInfo->BitsPerPixel = 15;
/* Fix up bogus BIOS'es that report incorrect reserved pixel masks
* for 32K color modes. Quite a number of BIOS'es have this problem,
* and this affects our OS/2 drivers in VBE fallback mode.
*/
if (bits == 15 && (modeInfo->RsvdMaskSize != 1 || modeInfo->RsvdFieldPosition != 15)) {
- modeInfo->RsvdMaskSize = 1;
- modeInfo->RsvdFieldPosition = 15;
- }
+ modeInfo->RsvdMaskSize = 1;
+ modeInfo->RsvdFieldPosition = 15;
+ }
return true;
}
@@ -391,20 +391,20 @@ long VBEAPI VBE_getPageSize(VBE_modeInfo *mi)
size = (long)mi->BytesPerScanLine * (long)mi->YResolution;
if (mi->BitsPerPixel == 4) {
- /* We have a 16 color video mode, so round up the page size to
- * 8k, 16k, 32k or 64k boundaries depending on how large it is.
- */
+ /* We have a 16 color video mode, so round up the page size to
+ * 8k, 16k, 32k or 64k boundaries depending on how large it is.
+ */
- size = (size + 0x1FFFL) & 0xFFFFE000L;
- if (size != 0x2000) {
- size = (size + 0x3FFFL) & 0xFFFFC000L;
- if (size != 0x4000) {
- size = (size + 0x7FFFL) & 0xFFFF8000L;
- if (size != 0x8000)
- size = (size + 0xFFFFL) & 0xFFFF0000L;
- }
- }
- }
+ size = (size + 0x1FFFL) & 0xFFFFE000L;
+ if (size != 0x2000) {
+ size = (size + 0x3FFFL) & 0xFFFFC000L;
+ if (size != 0x4000) {
+ size = (size + 0x7FFFL) & 0xFFFF8000L;
+ if (size != 0x8000)
+ size = (size + 0xFFFFL) & 0xFFFF0000L;
+ }
+ }
+ }
else size = (size + 0xFFFFL) & 0xFFFF0000L;
return size;
}
@@ -425,26 +425,26 @@ ibool VBEAPI VBE_setVideoModeExt(int mode,VBE_CRTCInfo *crtc)
RMREGS regs;
if (state->VBEVersion < 0x200 && mode < 0x100) {
- /* Some VBE implementations barf terribly if you try to set non-VBE
- * video modes with the VBE set mode call. VBE 2.0 implementations
- * must be able to handle this.
- */
- regs.h.al = (ushort)mode;
- regs.h.ah = 0;
- PM_int86(0x10,&regs,&regs);
- }
+ /* Some VBE implementations barf terribly if you try to set non-VBE
+ * video modes with the VBE set mode call. VBE 2.0 implementations
+ * must be able to handle this.
+ */
+ regs.h.al = (ushort)mode;
+ regs.h.ah = 0;
+ PM_int86(0x10,&regs,&regs);
+ }
else {
- if (state->VBEVersion < 0x300 && (mode & vbeRefreshCtrl))
- return false;
- regs.x.ax = 0x4F02;
- regs.x.bx = (ushort)mode;
- if ((mode & vbeRefreshCtrl) && crtc)
- VBE_callESDI(&regs, crtc, sizeof(*crtc));
- else
- PM_int86(0x10,&regs,&regs);
- if (regs.x.ax != VBE_SUCCESS)
- return false;
- }
+ if (state->VBEVersion < 0x300 && (mode & vbeRefreshCtrl))
+ return false;
+ regs.x.ax = 0x4F02;
+ regs.x.bx = (ushort)mode;
+ if ((mode & vbeRefreshCtrl) && crtc)
+ VBE_callESDI(&regs, crtc, sizeof(*crtc));
+ else
+ PM_int86(0x10,&regs,&regs);
+ if (regs.x.ax != VBE_SUCCESS)
+ return false;
+ }
return true;
}
@@ -475,7 +475,7 @@ int VBEAPI VBE_getVideoMode(void)
regs.x.ax = 0x4F03;
PM_int86(0x10,&regs,&regs);
if (regs.x.ax != VBE_SUCCESS)
- return -1;
+ return -1;
return regs.x.bx;
}
@@ -515,7 +515,7 @@ int VBEAPI VBE_getBank(int window)
regs.h.bl = window;
PM_int86(0x10,&regs,&regs);
if (regs.x.ax != VBE_SUCCESS)
- return -1;
+ return -1;
return regs.x.dx;
}
@@ -637,7 +637,7 @@ ibool VBEAPI VBE_setDisplayStart(int x,int y,ibool waitVRT)
regs.x.ax = 0x4F07;
if (waitVRT)
- regs.x.bx = 0x80;
+ regs.x.bx = 0x80;
else regs.x.bx = 0x00;
regs.x.cx = x;
regs.x.dx = y;
@@ -685,12 +685,12 @@ ibool VBEAPI VBE_setDisplayStartAlt(ulong startAddr,ibool waitVRT)
RMREGS regs;
if (state->VBEVersion >= 0x300) {
- regs.x.ax = 0x4F07;
- regs.x.bx = waitVRT ? 0x82 : 0x02;
- regs.e.ecx = startAddr;
- PM_int86(0x10,&regs,&regs);
- return regs.x.ax == VBE_SUCCESS;
- }
+ regs.x.ax = 0x4F07;
+ regs.x.bx = waitVRT ? 0x82 : 0x02;
+ regs.e.ecx = startAddr;
+ PM_int86(0x10,&regs,&regs);
+ return regs.x.ax == VBE_SUCCESS;
+ }
return false;
}
@@ -712,12 +712,12 @@ int VBEAPI VBE_getDisplayStartStatus(void)
RMREGS regs;
if (state->VBEVersion >= 0x300) {
- regs.x.ax = 0x4F07;
- regs.x.bx = 0x0004;
- PM_int86(0x10,&regs,&regs);
- if (regs.x.ax == VBE_SUCCESS)
- return (regs.x.cx != 0);
- }
+ regs.x.ax = 0x4F07;
+ regs.x.bx = 0x0004;
+ PM_int86(0x10,&regs,&regs);
+ if (regs.x.ax == VBE_SUCCESS)
+ return (regs.x.cx != 0);
+ }
return -1;
}
@@ -738,11 +738,11 @@ ibool VBEAPI VBE_enableStereoMode(void)
RMREGS regs;
if (state->VBEVersion >= 0x300) {
- regs.x.ax = 0x4F07;
- regs.x.bx = 0x0005;
- PM_int86(0x10,&regs,&regs);
- return regs.x.ax == VBE_SUCCESS;
- }
+ regs.x.ax = 0x4F07;
+ regs.x.bx = 0x0005;
+ PM_int86(0x10,&regs,&regs);
+ return regs.x.ax == VBE_SUCCESS;
+ }
return false;
}
@@ -762,11 +762,11 @@ ibool VBEAPI VBE_disableStereoMode(void)
RMREGS regs;
if (state->VBEVersion >= 0x300) {
- regs.x.ax = 0x4F07;
- regs.x.bx = 0x0006;
- PM_int86(0x10,&regs,&regs);
- return regs.x.ax == VBE_SUCCESS;
- }
+ regs.x.ax = 0x4F07;
+ regs.x.bx = 0x0006;
+ PM_int86(0x10,&regs,&regs);
+ return regs.x.ax == VBE_SUCCESS;
+ }
return false;
}
@@ -793,13 +793,13 @@ ibool VBEAPI VBE_setStereoDisplayStart(ulong leftAddr,ulong rightAddr,
RMREGS regs;
if (state->VBEVersion >= 0x300) {
- regs.x.ax = 0x4F07;
- regs.x.bx = waitVRT ? 0x83 : 0x03;
- regs.e.ecx = leftAddr;
- regs.e.edx = rightAddr;
- PM_int86(0x10,&regs,&regs);
- return regs.x.ax == VBE_SUCCESS;
- }
+ regs.x.ax = 0x4F07;
+ regs.x.bx = waitVRT ? 0x83 : 0x03;
+ regs.e.ecx = leftAddr;
+ regs.e.edx = rightAddr;
+ PM_int86(0x10,&regs,&regs);
+ return regs.x.ax == VBE_SUCCESS;
+ }
return false;
}
@@ -832,14 +832,14 @@ ulong VBEAPI VBE_getClosestClock(ushort mode,ulong pixelClock)
RMREGS regs;
if (state->VBEVersion >= 0x300) {
- regs.x.ax = 0x4F0B;
- regs.h.bl = 0x00;
- regs.e.ecx = pixelClock;
- regs.x.dx = mode;
- PM_int86(0x10,&regs,&regs);
- if (regs.x.ax == VBE_SUCCESS)
- return regs.e.ecx;
- }
+ regs.x.ax = 0x4F0B;
+ regs.h.bl = 0x00;
+ regs.e.ecx = pixelClock;
+ regs.x.dx = mode;
+ PM_int86(0x10,&regs,&regs);
+ if (regs.x.ax == VBE_SUCCESS)
+ return regs.e.ecx;
+ }
return -1;
}
@@ -875,7 +875,7 @@ int VBEAPI VBE_getDACWidth(void)
regs.h.bl = 0x01;
PM_int86(0x10,&regs,&regs);
if (regs.x.ax != VBE_SUCCESS)
- return -1;
+ return -1;
return regs.h.bh;
}
@@ -927,11 +927,11 @@ void * VBEAPI VBE_getBankedPointer(VBE_modeInfo *modeInfo)
*/
ulong seg = (ushort)modeInfo->WinASegment;
if (seg != 0) {
- if (seg == 0xA000)
- return (void*)PM_getA0000Pointer();
- else
- return (void*)PM_mapPhysicalAddr(seg << 4,0xFFFF,true);
- }
+ if (seg == 0xA000)
+ return (void*)PM_getA0000Pointer();
+ else
+ return (void*)PM_mapPhysicalAddr(seg << 4,0xFFFF,true);
+ }
return NULL;
}
@@ -956,14 +956,14 @@ void * VBEAPI VBE_getLinearPointer(VBE_modeInfo *modeInfo)
/* Search for an already mapped pointer */
for (i = 0; i < numPtrs; i++) {
- if (physPtr[i] == modeInfo->PhysBasePtr)
- return linPtr[i];
- }
+ if (physPtr[i] == modeInfo->PhysBasePtr)
+ return linPtr[i];
+ }
if (numPtrs < MAX_LIN_PTRS) {
- physPtr[numPtrs] = modeInfo->PhysBasePtr;
- linPtr[numPtrs] = PM_mapPhysicalAddr(modeInfo->PhysBasePtr,(state->VBEMemory * 1024L)-1,true);
- return linPtr[numPtrs++];
- }
+ physPtr[numPtrs] = modeInfo->PhysBasePtr;
+ linPtr[numPtrs] = PM_mapPhysicalAddr(modeInfo->PhysBasePtr,(state->VBEMemory * 1024L)-1,true);
+ return linPtr[numPtrs++];
+ }
return NULL;
}
@@ -989,56 +989,56 @@ static void InitPMCode(void)
int pmLen;
if (!state->pmInfo && state->VBEVersion >= 0x200) {
- regs.x.ax = 0x4F0A;
- regs.x.bx = 0;
- PM_int86x(0x10,&regs,&regs,&sregs);
- if (regs.x.ax != VBE_SUCCESS)
- return;
- if (VBE_shared)
- state->pmInfo = PM_mallocShared(regs.x.cx);
- else
- state->pmInfo = PM_malloc(regs.x.cx);
- if (state->pmInfo == NULL)
- return;
- state->pmInfo32 = state->pmInfo;
- pmLen = regs.x.cx;
+ regs.x.ax = 0x4F0A;
+ regs.x.bx = 0;
+ PM_int86x(0x10,&regs,&regs,&sregs);
+ if (regs.x.ax != VBE_SUCCESS)
+ return;
+ if (VBE_shared)
+ state->pmInfo = PM_mallocShared(regs.x.cx);
+ else
+ state->pmInfo = PM_malloc(regs.x.cx);
+ if (state->pmInfo == NULL)
+ return;
+ state->pmInfo32 = state->pmInfo;
+ pmLen = regs.x.cx;
- /* Relocate the block into our local data segment */
- code = PM_mapRealPointer(sregs.es,regs.x.di);
- memcpy(state->pmInfo,code,pmLen);
+ /* Relocate the block into our local data segment */
+ code = PM_mapRealPointer(sregs.es,regs.x.di);
+ memcpy(state->pmInfo,code,pmLen);
- /* Now do a sanity check on the information we recieve to ensure
- * that is is correct. Some BIOS return totally bogus information
- * in here (Matrox is one)! Under DOS this works OK, but under OS/2
- * we are screwed.
- */
- if (state->pmInfo->setWindow >= pmLen ||
- state->pmInfo->setDisplayStart >= pmLen ||
- state->pmInfo->setPalette >= pmLen ||
- state->pmInfo->IOPrivInfo >= pmLen) {
- if (VBE_shared)
- PM_freeShared(state->pmInfo);
- else
- PM_free(state->pmInfo);
- state->pmInfo32 = state->pmInfo = NULL;
- return;
- }
+ /* Now do a sanity check on the information we recieve to ensure
+ * that is is correct. Some BIOS return totally bogus information
+ * in here (Matrox is one)! Under DOS this works OK, but under OS/2
+ * we are screwed.
+ */
+ if (state->pmInfo->setWindow >= pmLen ||
+ state->pmInfo->setDisplayStart >= pmLen ||
+ state->pmInfo->setPalette >= pmLen ||
+ state->pmInfo->IOPrivInfo >= pmLen) {
+ if (VBE_shared)
+ PM_freeShared(state->pmInfo);
+ else
+ PM_free(state->pmInfo);
+ state->pmInfo32 = state->pmInfo = NULL;
+ return;
+ }
- /* Read the IO priveledge info and determine if we need to
- * pass a selector to MMIO registers to the bank switch code.
- * Since we no longer support selector allocation, we no longer
- * support this mechanism so we disable the protected mode
- * interface in this case.
- */
- if (state->pmInfo->IOPrivInfo && !state->MMIOSel) {
- ushort *p = (ushort*)((uchar*)state->pmInfo + state->pmInfo->IOPrivInfo);
- while (*p != 0xFFFF)
- p++;
- p++;
- if (*p != 0xFFFF)
- VBE_freePMCode();
- }
- }
+ /* Read the IO priveledge info and determine if we need to
+ * pass a selector to MMIO registers to the bank switch code.
+ * Since we no longer support selector allocation, we no longer
+ * support this mechanism so we disable the protected mode
+ * interface in this case.
+ */
+ if (state->pmInfo->IOPrivInfo && !state->MMIOSel) {
+ ushort *p = (ushort*)((uchar*)state->pmInfo + state->pmInfo->IOPrivInfo);
+ while (*p != 0xFFFF)
+ p++;
+ p++;
+ if (*p != 0xFFFF)
+ VBE_freePMCode();
+ }
+ }
}
void * VBEAPI VBE_getSetBank(void)
@@ -1050,10 +1050,10 @@ void * VBEAPI VBE_getSetBank(void)
****************************************************************************/
{
if (state->VBEVersion >= 0x200) {
- InitPMCode();
- if (state->pmInfo)
- return (uchar*)state->pmInfo + state->pmInfo->setWindow;
- }
+ InitPMCode();
+ if (state->pmInfo)
+ return (uchar*)state->pmInfo + state->pmInfo->setWindow;
+ }
return NULL;
}
@@ -1066,10 +1066,10 @@ void * VBEAPI VBE_getSetDisplayStart(void)
****************************************************************************/
{
if (state->VBEVersion >= 0x200) {
- InitPMCode();
- if (state->pmInfo)
- return (uchar*)state->pmInfo + state->pmInfo->setDisplayStart;
- }
+ InitPMCode();
+ if (state->pmInfo)
+ return (uchar*)state->pmInfo + state->pmInfo->setDisplayStart;
+ }
return NULL;
}
@@ -1082,10 +1082,10 @@ void * VBEAPI VBE_getSetPalette(void)
****************************************************************************/
{
if (state->VBEVersion >= 0x200) {
- InitPMCode();
- if (state->pmInfo)
- return (uchar*)state->pmInfo + state->pmInfo->setPalette;
- }
+ InitPMCode();
+ if (state->pmInfo)
+ return (uchar*)state->pmInfo + state->pmInfo->setPalette;
+ }
return NULL;
}
@@ -1104,13 +1104,13 @@ void VBEAPI VBE_freePMCode(void)
****************************************************************************/
{
if (state->pmInfo) {
- if (VBE_shared)
- PM_freeShared(state->pmInfo);
- else
- PM_free(state->pmInfo);
- state->pmInfo = NULL;
- state->pmInfo32 = NULL;
- }
+ if (VBE_shared)
+ PM_freeShared(state->pmInfo);
+ else
+ PM_free(state->pmInfo);
+ state->pmInfo = NULL;
+ state->pmInfo32 = NULL;
+ }
}
void VBEAPI VBE_sharePMCode(void)
@@ -1183,31 +1183,31 @@ ibool VBEAPI VBE_getBankFunc32(int *codeLen,void **bankFunc,int dualBanks,
InitPMCode();
if (state->VBEVersion >= 0x200 && state->pmInfo32 && !state->MMIOSel) {
- code = (uchar*)state->pmInfo32 + state->pmInfo32->setWindow;
- if (state->pmInfo32->extensionSig == VBE20_EXT_SIG)
- len = state->pmInfo32->setWindowLen-1;
- else {
- /* We are running on a system without the UniVBE 5.2 extension.
- * We do as best we can by scanning through the code for the
- * ret function to determine the length. This is not foolproof,
- * but is the best we can do.
- */
- p = code;
- while (*p != 0xC3)
- p++;
- len = p - code;
- }
- if ((len + sizeof(VBE20A_bankFunc32_Start) + sizeof(VBE20_bankFunc32_End)) > sizeof(bankFunc32))
- PM_fatalError("32-bit bank switch function too long!");
- copy(p,bankFunc32,VBE20A_bankFunc32_Start);
- memcpy(p,code,len);
- p += len;
- copy(p,p,VBE20_bankFunc32_End);
- *codeLen = p - bankFunc32;
- bankFunc32[VBE20_adjustOffset] = (uchar)bankAdjust;
- *bankFunc = bankFunc32;
- return true;
- }
+ code = (uchar*)state->pmInfo32 + state->pmInfo32->setWindow;
+ if (state->pmInfo32->extensionSig == VBE20_EXT_SIG)
+ len = state->pmInfo32->setWindowLen-1;
+ else {
+ /* We are running on a system without the UniVBE 5.2 extension.
+ * We do as best we can by scanning through the code for the
+ * ret function to determine the length. This is not foolproof,
+ * but is the best we can do.
+ */
+ p = code;
+ while (*p != 0xC3)
+ p++;
+ len = p - code;
+ }
+ if ((len + sizeof(VBE20A_bankFunc32_Start) + sizeof(VBE20_bankFunc32_End)) > sizeof(bankFunc32))
+ PM_fatalError("32-bit bank switch function too long!");
+ copy(p,bankFunc32,VBE20A_bankFunc32_Start);
+ memcpy(p,code,len);
+ p += len;
+ copy(p,p,VBE20_bankFunc32_End);
+ *codeLen = p - bankFunc32;
+ bankFunc32[VBE20_adjustOffset] = (uchar)bankAdjust;
+ *bankFunc = bankFunc32;
+ return true;
+ }
return false;
}
generated by cgit v1.2.3-70-g09d2 (git 2.51.2) at 2025-10-31 06:15:24 +0000