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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.c | 1214 |
1 files changed, 0 insertions, 1214 deletions
diff --git a/board/MAI/bios_emulator/scitech/src/common/vesavbe.c b/board/MAI/bios_emulator/scitech/src/common/vesavbe.c deleted file mode 100644 index a669e5c292..0000000000 --- a/board/MAI/bios_emulator/scitech/src/common/vesavbe.c +++ /dev/null @@ -1,1214 +0,0 @@ -/**************************************************************************** -* -* The SuperVGA Kit - UniVBE Software Development Kit -* -* ======================================================================== -* -* The contents of this file are subject to the SciTech MGL Public -* License Version 1.0 (the "License"); you may not use this file -* except in compliance with the License. You may obtain a copy of -* the License at http://www.scitechsoft.com/mgl-license.txt -* -* Software distributed under the License is distributed on an -* "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or -* implied. See the License for the specific language governing -* rights and limitations under the License. -* -* The Original Code is Copyright (C) 1991-1998 SciTech Software, Inc. -* -* The Initial Developer of the Original Code is SciTech Software, Inc. -* All Rights Reserved. -* -* ======================================================================== -* -* Language: ANSI C -* Environment: IBM PC Real Mode and 16/32 bit Protected Mode. -* -* Description: Module to implement a C callable interface to the standard -* VESA VBE routines. You should rip out this module and use it -* directly in your own applications, or you can use the -* high level SDK functions. -* -* MUST be compiled in the LARGE or FLAT models. -* -****************************************************************************/ - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include "vesavbe.h" -#include "pmapi.h" -#include "drvlib/os/os.h" - -/*---------------------------- Global Variables ---------------------------*/ - -#define VBE_SUCCESS 0x004F -#define MAX_LIN_PTRS 10 - -static uint VESABuf_len = 1024;/* Length of the VESABuf buffer */ -static ibool haveRiva128; /* True if we have a Riva128 */ -static VBE_state defState = {0}; /* Default state buffer */ -static VBE_state *state = &defState; /* Pointer to current buffer */ -static int VBE_shared = 0; -#ifndef REALMODE -static char localBuf[512]; /* Global PM string translate buf */ -#define MAX_LOCAL_BUF &localBuf[511] -#endif - -/*----------------------------- Implementation ----------------------------*/ - -/* static function in WinDirect for passing 32-bit registers to BIOS */ -int PMAPI WD_int386(int intno, RMREGS *in, RMREGS *out); - -void VBEAPI VBE_init(void) -/**************************************************************************** -* -* Function: VBE_init -* -* Description: Initialises the VBE transfer buffer in real mode DC.memory. -* This routine is called by the VESAVBE module every time -* it needs to use the transfer buffer, so we simply allocate -* it once and then return. -* -****************************************************************************/ -{ - 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!"); - } -} - -void * VBEAPI VBE_getRMBuf(uint *len,uint *rseg,uint *roff) -/**************************************************************************** -* -* Function: VBE_getRMBuf -* -* Description: This function returns the location and length of the real -* mode memory buffer for calling real mode functions. -* -****************************************************************************/ -{ - *len = VESABuf_len; - *rseg = state->VESABuf_rseg; - *roff = state->VESABuf_roff; - return state->VESABuf_ptr; -} - -void VBEAPI VBE_setStateBuffer(VBE_state *s) -/**************************************************************************** -* -* Function: VBE_setStateBuffer -* -* Description: This functions sets the internal state buffer for the -* VBE module to the passed in buffer. By default the internal -* global buffer is used, but you must use separate buffers -* for each device in a multi-controller environment. -* -****************************************************************************/ -{ - state = s; -} - -void VBEAPI VBE_callESDI(RMREGS *regs, void *buffer, int size) -/**************************************************************************** -* -* Function: VBE_callESDI -* Parameters: regs - Registers to load when calling VBE -* buffer - Buffer to copy VBE info block to -* size - Size of buffer to fill -* -* Description: Calls the VESA VBE and passes in a buffer for the VBE to -* store information in, which is then copied into the users -* buffer space. This works in protected mode as the buffer -* passed to the VESA VBE is allocated in conventional -* memory, and is then copied into the users memory block. -* -****************************************************************************/ -{ - RMSREGS sregs; - - if (!state->VESABuf_ptr) - 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); - PM_int86x(0x10, regs, regs, &sregs); - memcpy(buffer, state->VESABuf_ptr, size); -} - -#ifndef REALMODE -static char *VBE_copyStrToLocal(char *p,char *realPtr,char *max) -/**************************************************************************** -* -* Function: VBE_copyStrToLocal -* Parameters: p - Flat model buffer to copy to -* realPtr - Real mode pointer to copy -* Returns: Pointer to the next byte after string -* -* Description: Copies the string from the real mode location pointed to -* by 'realPtr' into the flat model buffer pointed to by -* 'p'. We return a pointer to the next byte past the copied -* string. -* -****************************************************************************/ -{ - uchar *v; - - v = PM_mapRealPointer((uint)((ulong)realPtr >> 16), (uint)((ulong)realPtr & 0xFFFF)); - while (*v != 0 && p < max) - *p++ = *v++; - *p++ = 0; - return p; -} - -static void VBE_copyShortToLocal(ushort *p,ushort *realPtr) -/**************************************************************************** -* -* Function: VBE_copyShortToLocal -* Parameters: p - Flat model buffer to copy to -* realPtr - Real mode pointer to copy -* -* Description: Copies the mode table from real mode memory to the flat -* model buffer. -* -****************************************************************************/ -{ - ushort *v; - - v = PM_mapRealPointer((uint)((ulong)realPtr >> 16),(uint)((ulong)realPtr & 0xFFFF)); - while (*v != 0xFFFF) - *p++ = *v++; - *p = 0xFFFF; -} -#endif - -int VBEAPI VBE_detectEXT(VBE_vgaInfo *vgaInfo,ibool forceUniVBE) -/**************************************************************************** -* -* Function: VBE_detect -* Parameters: vgaInfo - Place to store the VGA information block -* Returns: VBE version number, or 0 if not detected. -* -* Description: Detects if a VESA VBE is out there and functioning -* correctly. If we detect a VBE interface we return the -* VGAInfoBlock returned by the VBE and the VBE version number. -* -****************************************************************************/ -{ - RMREGS regs; - - regs.x.ax = 0x4F00; /* Get SuperVGA information */ - if (forceUniVBE) { - regs.x.bx = 0x1234; - regs.x.cx = 0x4321; - } - else { - regs.x.bx = 0; - regs.x.cx = 0; - } - strncpy(vgaInfo->VESASignature,"VBE2",4); - VBE_callESDI(®s, vgaInfo, sizeof(*vgaInfo)); - if (regs.x.ax != VBE_SUCCESS) - return 0; - if (strncmp(vgaInfo->VESASignature,"VESA",4) != 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; -#ifndef REALMODE - /* Relocate all the indirect information (mode tables, OEM strings - * etc) from the low 1Mb memory region into a static buffer in - * our default data segment. We do this to insulate the application - * from mapping the strings from real mode to protected mode. - */ - { - 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; - } - else { - VBE_copyShortToLocal((ushort*)p2,vgaInfo->VideoModePtr); - vgaInfo->VideoModePtr = (ushort*)p2; - } - } -#endif - state->VBEMemory = vgaInfo->TotalMemory * 64; - - /* Check for Riva128 based cards since they have broken triple buffering - * and stereo support. - */ - haveRiva128 = false; - if (vgaInfo->VESAVersion >= 0x300 && - (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; - return (state->VBEVersion = vgaInfo->VESAVersion); -} - -int VBEAPI VBE_detect(VBE_vgaInfo *vgaInfo) -/**************************************************************************** -* -* Function: VBE_detect -* Parameters: vgaInfo - Place to store the VGA information block -* Returns: VBE version number, or 0 if not detected. -* -* Description: Detects if a VESA VBE is out there and functioning -* correctly. If we detect a VBE interface we return the -* VGAInfoBlock returned by the VBE and the VBE version number. -* -****************************************************************************/ -{ - return VBE_detectEXT(vgaInfo,false); -} - -ibool VBEAPI VBE_getModeInfo(int mode,VBE_modeInfo *modeInfo) -/**************************************************************************** -* -* Function: VBE_getModeInfo -* Parameters: mode - VBE mode to get information for -* modeInfo - Place to store VBE mode information -* Returns: True on success, false if function failed. -* -* Description: Obtains information about a specific video mode from the -* VBE. You should use this function to find the video mode -* you wish to set, as the new VBE 2.0 mode numbers may be -* completely arbitrary. -* -****************************************************************************/ -{ - RMREGS regs; - int bits; - - regs.x.ax = 0x4F01; /* Get mode information */ - regs.x.cx = (ushort)mode; - VBE_callESDI(®s, modeInfo, sizeof(*modeInfo)); - if (regs.x.ax != VBE_SUCCESS) - return false; - if ((modeInfo->ModeAttributes & vbeMdAvailable) == 0) - return false; - - /* Map out triple buffer and stereo flags for NVidia Riva128 - * chips. - */ - if (haveRiva128) { - 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; - } - } - - /* 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; - - /* 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; - } - return true; -} - -long VBEAPI VBE_getPageSize(VBE_modeInfo *mi) -/**************************************************************************** -* -* Function: VBE_getPageSize -* Parameters: mi - Pointer to mode information block -* Returns: Caculated page size in bytes rounded to correct boundary -* -* Description: Computes the page size in bytes for the specified mode -* information block, rounded up to the appropriate boundary -* (8k, 16k, 32k or 64k). Pages >= 64k in size are always -* rounded to the nearest 64k boundary (so the start of a -* page is always bank aligned). -* -****************************************************************************/ -{ - long size; - - 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. - */ - - 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; -} - -ibool VBEAPI VBE_setVideoModeExt(int mode,VBE_CRTCInfo *crtc) -/**************************************************************************** -* -* Function: VBE_setVideoModeExt -* Parameters: mode - SuperVGA video mode to set. -* Returns: True if the mode was set, false if not. -* -* Description: Attempts to set the specified video mode. This version -* includes support for the VBE/Core 3.0 refresh rate control -* mechanism. -* -****************************************************************************/ -{ - 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,®s,®s); - } - else { - if (state->VBEVersion < 0x300 && (mode & vbeRefreshCtrl)) - return false; - regs.x.ax = 0x4F02; - regs.x.bx = (ushort)mode; - if ((mode & vbeRefreshCtrl) && crtc) - VBE_callESDI(®s, crtc, sizeof(*crtc)); - else - PM_int86(0x10,®s,®s); - if (regs.x.ax != VBE_SUCCESS) - return false; - } - return true; -} - -ibool VBEAPI VBE_setVideoMode(int mode) -/**************************************************************************** -* -* Function: VBE_setVideoMode -* Parameters: mode - SuperVGA video mode to set. -* Returns: True if the mode was set, false if not. -* -* Description: Attempts to set the specified video mode. -* -****************************************************************************/ -{ - return VBE_setVideoModeExt(mode,NULL); -} - -int VBEAPI VBE_getVideoMode(void) -/**************************************************************************** -* -* Function: VBE_getVideoMode -* Returns: Current video mode -* -****************************************************************************/ -{ - RMREGS regs; - - regs.x.ax = 0x4F03; - PM_int86(0x10,®s,®s); - if (regs.x.ax != VBE_SUCCESS) - return -1; - return regs.x.bx; -} - -ibool VBEAPI VBE_setBank(int window,int bank) -/**************************************************************************** -* -* Function: VBE_setBank -* Parameters: window - Window to set -* bank - Bank number to set window to -* Returns: True on success, false on failure. -* -****************************************************************************/ -{ - RMREGS regs; - - regs.x.ax = 0x4F05; - regs.h.bh = 0; - regs.h.bl = window; - regs.x.dx = bank; - PM_int86(0x10,®s,®s); - return regs.x.ax == VBE_SUCCESS; -} - -int VBEAPI VBE_getBank(int window) -/**************************************************************************** -* -* Function: VBE_setBank -* Parameters: window - Window to read -* Returns: Bank number for the window (-1 on failure) -* -****************************************************************************/ -{ - RMREGS regs; - - regs.x.ax = 0x4F05; - regs.h.bh = 1; - regs.h.bl = window; - PM_int86(0x10,®s,®s); - if (regs.x.ax != VBE_SUCCESS) - return -1; - return regs.x.dx; -} - -ibool VBEAPI VBE_setPixelsPerLine(int pixelsPerLine,int *newBytes, - int *newPixels,int *maxScanlines) -/**************************************************************************** -* -* Function: VBE_setPixelsPerLine -* Parameters: pixelsPerLine - Pixels per scanline -* newBytes - Storage for bytes per line value set -* newPixels - Storage for pixels per line value set -* maxScanLines - Storage for maximum number of scanlines -* Returns: True on success, false on failure -* -* Description: Sets the scanline length for the video mode to the specified -* number of pixels per scanline. If you need more granularity -* in TrueColor modes, use the VBE_setBytesPerLine routine -* (only valid for VBE 2.0). -* -****************************************************************************/ -{ - RMREGS regs; - - regs.x.ax = 0x4F06; - regs.h.bl = 0; - regs.x.cx = pixelsPerLine; - PM_int86(0x10,®s,®s); - *newBytes = regs.x.bx; - *newPixels = regs.x.cx; - *maxScanlines = regs.x.dx; - return regs.x.ax == VBE_SUCCESS; -} - -ibool VBEAPI VBE_setBytesPerLine(int bytesPerLine,int *newBytes, - int *newPixels,int *maxScanlines) -/**************************************************************************** -* -* Function: VBE_setBytesPerLine -* Parameters: pixelsPerLine - Pixels per scanline -* newBytes - Storage for bytes per line value set -* newPixels - Storage for pixels per line value set -* maxScanLines - Storage for maximum number of scanlines -* Returns: True on success, false on failure -* -* Description: Sets the scanline length for the video mode to the specified -* number of bytes per scanline (valid for VBE 2.0 only). -* -****************************************************************************/ -{ - RMREGS regs; - - regs.x.ax = 0x4F06; - regs.h.bl = 2; - regs.x.cx = bytesPerLine; - PM_int86(0x10,®s,®s); - *newBytes = regs.x.bx; - *newPixels = regs.x.cx; - *maxScanlines = regs.x.dx; - return regs.x.ax == VBE_SUCCESS; -} - -ibool VBEAPI VBE_getScanlineLength(int *bytesPerLine,int *pixelsPerLine, - int *maxScanlines) -/**************************************************************************** -* -* Function: VBE_getScanlineLength -* Parameters: bytesPerLine - Storage for bytes per scanline -* pixelsPerLine - Storage for pixels per scanline -* maxScanLines - Storage for maximum number of scanlines -* Returns: True on success, false on failure -* -****************************************************************************/ -{ - RMREGS regs; - - regs.x.ax = 0x4F06; - regs.h.bl = 1; - PM_int86(0x10,®s,®s); - *bytesPerLine = regs.x.bx; - *pixelsPerLine = regs.x.cx; - *maxScanlines = regs.x.dx; - return regs.x.ax == VBE_SUCCESS; -} - -ibool VBEAPI VBE_getMaxScanlineLength(int *maxBytes,int *maxPixels) -/**************************************************************************** -* -* Function: VBE_getMaxScanlineLength -* Parameters: maxBytes - Maximum scanline width in bytes -* maxPixels - Maximum scanline width in pixels -* Returns: True if successful, false if function failed -* -****************************************************************************/ -{ - RMREGS regs; - - regs.x.ax = 0x4F06; - regs.h.bl = 3; - PM_int86(0x10,®s,®s); - *maxBytes = regs.x.bx; - *maxPixels = regs.x.cx; - return regs.x.ax == VBE_SUCCESS; -} - -ibool VBEAPI VBE_setDisplayStart(int x,int y,ibool waitVRT) -/**************************************************************************** -* -* Function: VBE_setDisplayStart -* Parameters: x,y - Position of the first pixel to display -* waitVRT - True to wait for retrace, false if not -* Returns: True if function was successful. -* -* Description: Sets the new starting display position to implement -* hardware scrolling. -* -****************************************************************************/ -{ - RMREGS regs; - - regs.x.ax = 0x4F07; - if (waitVRT) - regs.x.bx = 0x80; - else regs.x.bx = 0x00; - regs.x.cx = x; - regs.x.dx = y; - PM_int86(0x10,®s,®s); - return regs.x.ax == VBE_SUCCESS; -} - -ibool VBEAPI VBE_getDisplayStart(int *x,int *y) -/**************************************************************************** -* -* Function: VBE_getDisplayStart -* Parameters: x,y - Place to store starting address value -* Returns: True if function was successful. -* -****************************************************************************/ -{ - RMREGS regs; - - regs.x.ax = 0x4F07; - regs.x.bx = 0x01; - PM_int86(0x10,®s,®s); - *x = regs.x.cx; - *y = regs.x.dx; - return regs.x.ax == VBE_SUCCESS; -} - -ibool VBEAPI VBE_setDisplayStartAlt(ulong startAddr,ibool waitVRT) -/**************************************************************************** -* -* Function: VBE_setDisplayStartAlt -* Parameters: startAddr - 32-bit starting address in display memory -* waitVRT - True to wait for vertical retrace, false if not -* Returns: True if function was successful, false if not supported. -* -* Description: Sets the new starting display position to the specified -* 32-bit display start address. Note that this function is -* different the the version above, since it takes a 32-bit -* byte offset in video memory as the starting address which -* gives the programmer maximum control over the stat address. -* -* NOTE: Requires VBE/Core 3.0 -* -****************************************************************************/ -{ - RMREGS regs; - - if (state->VBEVersion >= 0x300) { - regs.x.ax = 0x4F07; - regs.x.bx = waitVRT ? 0x82 : 0x02; - regs.e.ecx = startAddr; - PM_int86(0x10,®s,®s); - return regs.x.ax == VBE_SUCCESS; - } - return false; -} - -int VBEAPI VBE_getDisplayStartStatus(void) -/**************************************************************************** -* -* Function: VBE_getDisplayStartStatus -* Returns: 0 if last flip not occurred, 1 if already flipped -* -1 if not supported -* -* Description: Returns the status of the previous display start request. -* If this function is supported the programmer can implement -* hardware triple buffering using this function. -* -* NOTE: Requires VBE/Core 3.0 -* -****************************************************************************/ -{ - RMREGS regs; - - if (state->VBEVersion >= 0x300) { - regs.x.ax = 0x4F07; - regs.x.bx = 0x0004; - PM_int86(0x10,®s,®s); - if (regs.x.ax == VBE_SUCCESS) - return (regs.x.cx != 0); - } - return -1; -} - -ibool VBEAPI VBE_enableStereoMode(void) -/**************************************************************************** -* -* Function: VBE_enableStereoMode -* Returns: True if stereo mode enabled, false if not supported. -* -* Description: Puts the system into hardware stereo mode for LC shutter -* glasses, where the display swaps between two display start -* addresses every vertical retrace. -* -* NOTE: Requires VBE/Core 3.0 -* -****************************************************************************/ -{ - RMREGS regs; - - if (state->VBEVersion >= 0x300) { - regs.x.ax = 0x4F07; - regs.x.bx = 0x0005; - PM_int86(0x10,®s,®s); - return regs.x.ax == VBE_SUCCESS; - } - return false; -} - -ibool VBEAPI VBE_disableStereoMode(void) -/**************************************************************************** -* -* Function: VBE_disableStereoMode -* Returns: True if stereo mode disabled, false if not supported. -* -* Description: Puts the system back into normal, non-stereo display mode -* after having stereo mode enabled. -* -* NOTE: Requires VBE/Core 3.0 -* -****************************************************************************/ -{ - RMREGS regs; - - if (state->VBEVersion >= 0x300) { - regs.x.ax = 0x4F07; - regs.x.bx = 0x0006; - PM_int86(0x10,®s,®s); - return regs.x.ax == VBE_SUCCESS; - } - return false; -} - -ibool VBEAPI VBE_setStereoDisplayStart(ulong leftAddr,ulong rightAddr, - ibool waitVRT) -/**************************************************************************** -* -* Function: VBE_setStereoDisplayStart -* Parameters: leftAddr - 32-bit start address for left image -* rightAddr - 32-bit start address for right image -* waitVRT - True to wait for vertical retrace, false if not -* Returns: True if function was successful, false if not supported. -* -* Description: Sets the new starting display position to the specified -* 32-bit display start address. Note that this function is -* different the the version above, since it takes a 32-bit -* byte offset in video memory as the starting address which -* gives the programmer maximum control over the stat address. -* -* NOTE: Requires VBE/Core 3.0 -* -****************************************************************************/ -{ - 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,®s,®s); - return regs.x.ax == VBE_SUCCESS; - } - return false; -} - -ulong VBEAPI VBE_getClosestClock(ushort mode,ulong pixelClock) -/**************************************************************************** -* -* Function: VBE_getClosestClock -* Parameters: mode - VBE mode to be used (include vbeLinearBuffer) -* pixelClock - Desired pixel clock -* Returns: Closest pixel clock to desired clock (-1 if not supported) -* -* Description: Calls the VBE/Core 3.0 interface to determine the closest -* pixel clock to the requested value. The BIOS will always -* search for a pixel clock that is no more than 1% below the -* requested clock or somewhere higher than the clock. If the -* clock is higher note that it may well be many Mhz higher -* that requested and the application will have to check that -* the returned value is suitable for it's needs. This function -* returns the actual pixel clock that will be programmed by -* the hardware. -* -* Note that if the pixel clock will be used with a linear -* framebuffer mode, make sure you pass in the linear -* framebuffer flag to this function. -* -* NOTE: Requires VBE/Core 3.0 -* -****************************************************************************/ -{ - 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,®s,®s); - if (regs.x.ax == VBE_SUCCESS) - return regs.e.ecx; - } - return -1; -} - -ibool VBEAPI VBE_setDACWidth(int width) -/**************************************************************************** -* -* Function: VBE_setDACWidth -* Parameters: width - Width to set the DAC to -* Returns: True on success, false on failure -* -****************************************************************************/ -{ - RMREGS regs; - - regs.x.ax = 0x4F08; - regs.h.bl = 0x00; - regs.h.bh = width; - PM_int86(0x10,®s,®s); - return regs.x.ax == VBE_SUCCESS; -} - -int VBEAPI VBE_getDACWidth(void) -/**************************************************************************** -* -* Function: VBE_getDACWidth -* Returns: Current width of the palette DAC -* -****************************************************************************/ -{ - RMREGS regs; - - regs.x.ax = 0x4F08; - regs.h.bl = 0x01; - PM_int86(0x10,®s,®s); - if (regs.x.ax != VBE_SUCCESS) - return -1; - return regs.h.bh; -} - -ibool VBEAPI VBE_setPalette(int start,int num,VBE_palette *pal,ibool waitVRT) -/**************************************************************************** -* -* Function: VBE_setPalette -* Parameters: start - Starting palette index to program -* num - Number of palette indexes to program -* pal - Palette buffer containing values -* waitVRT - Wait for vertical retrace flag -* Returns: True on success, false on failure -* -* Description: Sets a block of palette registers by calling the VBE 2.0 -* BIOS. This function will fail on VBE 1.2 implementations. -* -****************************************************************************/ -{ - RMREGS regs; - - regs.x.ax = 0x4F09; - regs.h.bl = waitVRT ? 0x80 : 0x00; - regs.x.cx = num; - regs.x.dx = start; - VBE_callESDI(®s, pal, sizeof(VBE_palette) * num); - return regs.x.ax == VBE_SUCCESS; -} - -void * VBEAPI VBE_getBankedPointer(VBE_modeInfo *modeInfo) -/**************************************************************************** -* -* Function: VBE_getBankedPointer -* Parameters: modeInfo - Mode info block for video mode -* Returns: Selector to the linear framebuffer (0 on failure) -* -* Description: Returns a near pointer to the VGA framebuffer area. -* -****************************************************************************/ -{ - /* We just map the pointer every time, since the pointer will always - * be in real mode memory, so we wont actually be mapping any real - * memory. - * - * NOTE: We cannot currently map a near pointer to the banked frame - * buffer for Watcom Win386, so we create a 16:16 far pointer to - * the video memory. All the assembler code will render to the - * video memory by loading the selector rather than using a - * near pointer. - */ - ulong seg = (ushort)modeInfo->WinASegment; - if (seg != 0) { - if (seg == 0xA000) - return (void*)PM_getA0000Pointer(); - else - return (void*)PM_mapPhysicalAddr(seg << 4,0xFFFF,true); - } - return NULL; -} - -#ifndef REALMODE - -void * VBEAPI VBE_getLinearPointer(VBE_modeInfo *modeInfo) -/**************************************************************************** -* -* Function: VBE_getLinearPointer -* Parameters: modeInfo - Mode info block for video mode -* Returns: Selector to the linear framebuffer (0 on failure) -* -* Description: Returns a near pointer to the linear framebuffer for the video -* mode. -* -****************************************************************************/ -{ - static ulong physPtr[MAX_LIN_PTRS] = {0}; - static void *linPtr[MAX_LIN_PTRS] = {0}; - static int numPtrs = 0; - int i; - - /* Search for an already mapped pointer */ - for (i = 0; i < numPtrs; 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++]; - } - return NULL; -} - -static void InitPMCode(void) -/**************************************************************************** -* -* Function: InitPMCode - 32 bit protected mode version -* -* Description: Finds the address of and relocates the protected mode -* code block from the VBE 2.0 into a local memory block. The -* memory block is allocated with malloc() and must be freed -* with VBE_freePMCode() after graphics processing is complete. -* -* Note that this buffer _must_ be recopied after each mode set, -* as the routines will change depending on the underlying -* video mode. -* -****************************************************************************/ -{ - RMREGS regs; - RMSREGS sregs; - uchar *code; - int pmLen; - - if (!state->pmInfo && state->VBEVersion >= 0x200) { - regs.x.ax = 0x4F0A; - regs.x.bx = 0; - PM_int86x(0x10,®s,®s,&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); - - /* 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(); - } - } -} - -void * VBEAPI VBE_getSetBank(void) -/**************************************************************************** -* -* Function: VBE_getSetBank -* Returns: Pointer to the 32 VBE 2.0 bit bank switching routine. -* -****************************************************************************/ -{ - if (state->VBEVersion >= 0x200) { - InitPMCode(); - if (state->pmInfo) - return (uchar*)state->pmInfo + state->pmInfo->setWindow; - } - return NULL; -} - -void * VBEAPI VBE_getSetDisplayStart(void) -/**************************************************************************** -* -* Function: VBE_getSetDisplayStart -* Returns: Pointer to the 32 VBE 2.0 bit CRT start address routine. -* -****************************************************************************/ -{ - if (state->VBEVersion >= 0x200) { - InitPMCode(); - if (state->pmInfo) - return (uchar*)state->pmInfo + state->pmInfo->setDisplayStart; - } - return NULL; -} - -void * VBEAPI VBE_getSetPalette(void) -/**************************************************************************** -* -* Function: VBE_getSetPalette -* Returns: Pointer to the 32 VBE 2.0 bit palette programming routine. -* -****************************************************************************/ -{ - if (state->VBEVersion >= 0x200) { - InitPMCode(); - if (state->pmInfo) - return (uchar*)state->pmInfo + state->pmInfo->setPalette; - } - return NULL; -} - -void VBEAPI VBE_freePMCode(void) -/**************************************************************************** -* -* Function: VBE_freePMCode -* -* Description: This routine frees the protected mode code blocks that -* we copied from the VBE 2.0 interface. This routine must -* be after you have finished graphics processing to free up -* the memory occupied by the routines. This is necessary -* because the PM info memory block must be re-copied after -* every video mode set from the VBE 2.0 implementation. -* -****************************************************************************/ -{ - if (state->pmInfo) { - if (VBE_shared) - PM_freeShared(state->pmInfo); - else - PM_free(state->pmInfo); - state->pmInfo = NULL; - state->pmInfo32 = NULL; - } -} - -void VBEAPI VBE_sharePMCode(void) -/**************************************************************************** -* -* Function: VBE_sharePMCode -* -* Description: Enables internal sharing of the PM code buffer for OS/2. -* -****************************************************************************/ -{ - VBE_shared = true; -} - -/* Set of code stubs used to build the final bank switch code */ - -#define VBE20_adjustOffset 7 - -static uchar VBE20A_bankFunc32_Start[] = { - 0x53,0x51, /* push ebx,ecx */ - 0x8B,0xD0, /* mov edx,eax */ - 0x33,0xDB, /* xor ebx,ebx */ - 0xB1,0x00, /* mov cl,0 */ - 0xD2,0xE2, /* shl dl,cl */ - }; - -static uchar VBE20_bankFunc32_End[] = { - 0x59,0x5B, /* pop ecx,ebx */ - }; - -static uchar bankFunc32[100]; - -#define copy(p,b,a) memcpy(b,a,sizeof(a)); (p) = (b) + sizeof(a) - -ibool VBEAPI VBE_getBankFunc32(int *codeLen,void **bankFunc,int dualBanks, - int bankAdjust) -/**************************************************************************** -* -* Function: VBE_getBankFunc32 -* Parameters: codeLen - Place to store length of code -* bankFunc - Place to store pointer to bank switch code -* dualBanks - True if dual banks are in effect -* bankAdjust - Bank shift adjustment factor -* Returns: True on success, false if not compatible. -* -* Description: Creates a local 32 bit bank switch function from the -* VBE 2.0 bank switch code that is compatible with the -* virtual flat framebuffer devices (does not have a return -* instruction at the end and takes the bank number in EAX -* not EDX). Note that this 32 bit code cannot include int 10h -* instructions, so we can only do this if we have VBE 2.0 -* or later. -* -* Note that we need to know the length of the 32 bit -* bank switch function, which the standard VBE 2.0 spec -* does not provide. In order to support this we have -* extended the VBE 2.0 state->pmInfo structure in UniVBE 5.2 in a -* way to support this, and we hope that this will become -* a VBE 2.0 ammendment. -* -* Note also that we cannot run the linear framebuffer -* emulation code with bank switching routines that require -* a selector to the memory mapped registers passed in ES. -* -****************************************************************************/ -{ - int len; - uchar *code; - uchar *p; - - 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; - } - return false; -} - -#endif |