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Diffstat (limited to 'board/MAI/bios_emulator/scitech/src/pm/smx/pm.c')
| -rw-r--r-- | board/MAI/bios_emulator/scitech/src/pm/smx/pm.c | 1187 |
1 files changed, 0 insertions, 1187 deletions
diff --git a/board/MAI/bios_emulator/scitech/src/pm/smx/pm.c b/board/MAI/bios_emulator/scitech/src/pm/smx/pm.c deleted file mode 100644 index 99ee3d4be4..0000000000 --- a/board/MAI/bios_emulator/scitech/src/pm/smx/pm.c +++ /dev/null @@ -1,1187 +0,0 @@ -/**************************************************************************** -* -* SciTech OS Portability Manager Library -* -* ======================================================================== -* -* 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: 32 bit SMX embedded systems development. -* -* Description: Implementation for the OS Portability Manager Library, which -* contains functions to implement OS specific services in a -* generic, cross platform API. Porting the OS Portability -* Manager library is the first step to porting any SciTech -* products to a new platform. -* -****************************************************************************/ - -#include "pmapi.h" -#include "drvlib/os/os.h" -#include "ztimerc.h" -#include "event.h" -#include "mtrr.h" -#include "pm_help.h" -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <dos.h> -#include <conio.h> -#ifdef __GNUC__ -#include <unistd.h> -#include <sys/nearptr.h> -#include <sys/stat.h> -#else -#include <direct.h> -#endif -#ifdef __BORLANDC__ -#pragma warn -par -#endif - -/*--------------------------- Global variables ----------------------------*/ - -typedef struct { - int oldMode; - int old50Lines; - } DOS_stateBuf; - -#define MAX_RM_BLOCKS 10 - -static struct { - void *p; - uint tag; - } rmBlocks[MAX_RM_BLOCKS]; - -static uint VESABuf_len = 1024; /* Length of the VESABuf buffer */ -static void *VESABuf_ptr = NULL; /* Near pointer to VESABuf */ -static uint VESABuf_rseg; /* Real mode segment of VESABuf */ -static uint VESABuf_roff; /* Real mode offset of VESABuf */ -static void (PMAPIP fatalErrorCleanup)(void) = NULL; -ushort _VARAPI _PM_savedDS = 0; -static ulong PDB = 0,*pPDB = NULL; -static uint VXD_version = -1; - -/*----------------------------- Implementation ----------------------------*/ - -ulong _ASMAPI _PM_getPDB(void); -void _ASMAPI _PM_VxDCall(VXD_regs *regs,uint off,uint sel); - -/**************************************************************************** -REMARKS: -External function to call the PMHELP helper VxD. -****************************************************************************/ -void PMAPI PM_VxDCall( - VXD_regs *regs) -{ -} - -/**************************************************************************** -RETURNS: -BCD coded version number of the VxD, or 0 if not loaded (ie: 0x202 - 2.2) - -REMARKS: -This function gets the version number for the VxD that we have connected to. -****************************************************************************/ -uint PMAPI PMHELP_getVersion(void) -{ - return VXD_version = 0; -} - -void PMAPI PM_init(void) -{ -#ifndef REALMODE - MTRR_init(); -#endif -} - -/**************************************************************************** -PARAMETERS: -base - The starting physical base address of the region -size - The size in bytes of the region -type - Type to place into the MTRR register - -RETURNS: -Error code describing the result. - -REMARKS: -Function to enable write combining for the specified region of memory. -****************************************************************************/ -int PMAPI PM_enableWriteCombine( - ulong base, - ulong size, - uint type) -{ -#ifndef REALMODE - return MTRR_enableWriteCombine(base,size,type); -#else - return PM_MTRR_NOT_SUPPORTED; -#endif -} - -ibool PMAPI PM_haveBIOSAccess(void) -{ return false; } - -long PMAPI PM_getOSType(void) -{ return _OS_SMX; } - -int PMAPI PM_getModeType(void) -{ return PM_386; } - -void PMAPI PM_backslash(char *s) -{ - uint pos = strlen(s); - if (s[pos-1] != '\\') { - s[pos] = '\\'; - s[pos+1] = '\0'; - } -} - -void PMAPI PM_setFatalErrorCleanup( - void (PMAPIP cleanup)(void)) -{ - fatalErrorCleanup = cleanup; -} - -void MGLOutput(char *); - -void PMAPI PM_fatalError(const char *msg) -{ - if (fatalErrorCleanup) - fatalErrorCleanup(); - MGLOutput(msg); -/* No support for fprintf() under smx currently! */ -/* fprintf(stderr,"%s\n", msg); */ - exit(1); -} - -static void ExitVBEBuf(void) -{ - if (VESABuf_ptr) - PM_freeRealSeg(VESABuf_ptr); - VESABuf_ptr = 0; -} - -void * PMAPI PM_getVESABuf(uint *len,uint *rseg,uint *roff) -{ - if (!VESABuf_ptr) { - /* Allocate a global buffer for communicating with the VESA VBE */ - if ((VESABuf_ptr = PM_allocRealSeg(VESABuf_len, &VESABuf_rseg, &VESABuf_roff)) == NULL) - return NULL; - atexit(ExitVBEBuf); - } - *len = VESABuf_len; - *rseg = VESABuf_rseg; - *roff = VESABuf_roff; - return VESABuf_ptr; -} - -int PMAPI PM_int386(int intno, PMREGS *in, PMREGS *out) -{ - PMSREGS sregs; - PM_segread(&sregs); - return PM_int386x(intno,in,out,&sregs); -} - -/* Routines to set and get the real mode interrupt vectors, by making - * direct real mode calls to DOS and bypassing the DOS extenders API. - * This is the safest way to handle this, as some servers try to be - * smart about changing real mode vectors. - */ - -void PMAPI _PM_getRMvect(int intno, long *realisr) -{ - RMREGS regs; - RMSREGS sregs; - - PM_saveDS(); - regs.h.ah = 0x35; - regs.h.al = intno; - PM_int86x(0x21, ®s, ®s, &sregs); - *realisr = ((long)sregs.es << 16) | regs.x.bx; -} - -void PMAPI _PM_setRMvect(int intno, long realisr) -{ - RMREGS regs; - RMSREGS sregs; - - PM_saveDS(); - regs.h.ah = 0x25; - regs.h.al = intno; - sregs.ds = (int)(realisr >> 16); - regs.x.dx = (int)(realisr & 0xFFFF); - PM_int86x(0x21, ®s, ®s, &sregs); -} - -void PMAPI _PM_addRealModeBlock(void *mem,uint tag) -{ - int i; - - for (i = 0; i < MAX_RM_BLOCKS; i++) { - if (rmBlocks[i].p == NULL) { - rmBlocks[i].p = mem; - rmBlocks[i].tag = tag; - return; - } - } - PM_fatalError("To many real mode memory block allocations!"); -} - -uint PMAPI _PM_findRealModeBlock(void *mem) -{ - int i; - - for (i = 0; i < MAX_RM_BLOCKS; i++) { - if (rmBlocks[i].p == mem) - return rmBlocks[i].tag; - } - PM_fatalError("Could not find prior real mode memory block allocation!"); - return 0; -} - -char * PMAPI PM_getCurrentPath( - char *path, - int maxLen) -{ - return getcwd(path,maxLen); -} - -char PMAPI PM_getBootDrive(void) -{ return 'C'; } - -const char * PMAPI PM_getVBEAFPath(void) -{ return "c:\\"; } - -const char * PMAPI PM_getNucleusPath(void) -{ - static char path[256]; - char *env; - - if ((env = getenv("NUCLEUS_PATH")) != NULL) - return env; - return "c:\\nucleus"; -} - -const char * PMAPI PM_getNucleusConfigPath(void) -{ - static char path[256]; - strcpy(path,PM_getNucleusPath()); - PM_backslash(path); - strcat(path,"config"); - return path; -} - -const char * PMAPI PM_getUniqueID(void) -{ return "SMX"; } - -const char * PMAPI PM_getMachineName(void) -{ return "SMX"; } - -int PMAPI PM_kbhit(void) -{ - int hit; - event_t evt; - - hit = EVT_peekNext(&evt,EVT_KEYDOWN | EVT_KEYREPEAT); - EVT_flush(~(EVT_KEYDOWN | EVT_KEYREPEAT)); - return hit; -} - -int PMAPI PM_getch(void) -{ - event_t evt; - - EVT_halt(&evt,EVT_KEYDOWN); - return EVT_asciiCode(evt.message); -} - -PM_HWND PMAPI PM_openConsole(PM_HWND hwndUser,int device,int xRes,int yRes,int bpp,ibool fullScreen) -{ - /* Not used for SMX */ - (void)hwndUser; - (void)device; - (void)xRes; - (void)yRes; - (void)bpp; - (void)fullScreen; - return 0; -} - -int PMAPI PM_getConsoleStateSize(void) -{ - return sizeof(DOS_stateBuf); -} - -void PMAPI PM_saveConsoleState(void *stateBuf,PM_HWND hwndConsole) -{ - RMREGS regs; - DOS_stateBuf *sb = stateBuf; - - /* Save the old video mode state */ - regs.h.ah = 0x0F; - PM_int86(0x10,®s,®s); - sb->oldMode = regs.h.al & 0x7F; - sb->old50Lines = false; - if (sb->oldMode == 0x3) { - regs.x.ax = 0x1130; - regs.x.bx = 0; - regs.x.dx = 0; - PM_int86(0x10,®s,®s); - sb->old50Lines = (regs.h.dl == 42 || regs.h.dl == 49); - } - (void)hwndConsole; -} - -void PMAPI PM_setSuspendAppCallback(int (_ASMAPIP saveState)(int flags)) -{ - /* Not used for SMX */ - (void)saveState; -} - -void PMAPI PM_restoreConsoleState(const void *stateBuf,PM_HWND hwndConsole) -{ - RMREGS regs; - const DOS_stateBuf *sb = stateBuf; - - /* Retore 50 line mode if set */ - if (sb->old50Lines) { - regs.x.ax = 0x1112; - regs.x.bx = 0; - PM_int86(0x10,®s,®s); - } - (void)hwndConsole; -} - -void PMAPI PM_closeConsole(PM_HWND hwndConsole) -{ - /* Not used for SMX */ - (void)hwndConsole; -} - -void PMAPI PM_setOSCursorLocation(int x,int y) -{ - uchar *_biosPtr = PM_getBIOSPointer(); - PM_setByte(_biosPtr+0x50,x); - PM_setByte(_biosPtr+0x51,y); -} - -void PMAPI PM_setOSScreenWidth(int width,int height) -{ - uchar *_biosPtr = PM_getBIOSPointer(); - PM_setWord(_biosPtr+0x4A,width); - PM_setWord(_biosPtr+0x4C,width*2); - PM_setByte(_biosPtr+0x84,height-1); - if (height > 25) { - PM_setWord(_biosPtr+0x60,0x0607); - PM_setByte(_biosPtr+0x85,0x08); - } - else { - PM_setWord(_biosPtr+0x60,0x0D0E); - PM_setByte(_biosPtr+0x85,0x016); - } -} - -void * PMAPI PM_mallocShared(long size) -{ - return PM_malloc(size); -} - -void PMAPI PM_freeShared(void *ptr) -{ - PM_free(ptr); -} - -#define GetRMVect(intno,isr) *(isr) = ((ulong*)rmZeroPtr)[intno] -#define SetRMVect(intno,isr) ((ulong*)rmZeroPtr)[intno] = (isr) - -ibool PMAPI PM_doBIOSPOST( - ushort axVal, - ulong BIOSPhysAddr, - void *mappedBIOS, - ulong BIOSLen) -{ - static int firstTime = true; - static uchar *rmZeroPtr; - long Current10,Current6D,Current42; - RMREGS regs; - RMSREGS sregs; - - /* Create a zero memory mapping for us to use */ - if (firstTime) { - rmZeroPtr = PM_mapPhysicalAddr(0,0x7FFF,true); - firstTime = false; - } - - /* Remap the secondary BIOS to 0xC0000 physical */ - if (BIOSPhysAddr != 0xC0000L || BIOSLen > 32768) { - /* SMX cannot virtually remap the BIOS, so we can only work if all - * the secondary controllers are identical, and we then use the - * BIOS on the first controller for all the remaining controllers. - * - * For OS'es that do virtual memory, and remapping of 0xC0000 - * physical (perhaps a copy on write mapping) should be all that - * is needed. - */ - return false; - } - - /* Save current handlers of int 10h and 6Dh */ - GetRMVect(0x10,&Current10); - GetRMVect(0x6D,&Current6D); - - /* POST the secondary BIOS */ - GetRMVect(0x42,&Current42); - SetRMVect(0x10,Current42); /* Restore int 10h to STD-BIOS */ - regs.x.ax = axVal; - PM_callRealMode(0xC000,0x0003,®s,&sregs); - - /* Restore current handlers */ - SetRMVect(0x10,Current10); - SetRMVect(0x6D,Current6D); - - /* Second the primary BIOS mappin 1:1 for 0xC0000 physical */ - if (BIOSPhysAddr != 0xC0000L) { - /* SMX does not support this */ - (void)mappedBIOS; - } - return true; -} - -void PMAPI PM_sleep(ulong milliseconds) -{ - ulong microseconds = milliseconds * 1000L; - LZTimerObject tm; - - LZTimerOnExt(&tm); - while (LZTimerLapExt(&tm) < microseconds) - ; - LZTimerOffExt(&tm); -} - -int PMAPI PM_getCOMPort(int port) -{ - switch (port) { - case 0: return 0x3F8; - case 1: return 0x2F8; - } - return 0; -} - -int PMAPI PM_getLPTPort(int port) -{ - switch (port) { - case 0: return 0x3BC; - case 1: return 0x378; - case 2: return 0x278; - } - return 0; -} - -PM_MODULE PMAPI PM_loadLibrary( - const char *szDLLName) -{ - (void)szDLLName; - return NULL; -} - -void * PMAPI PM_getProcAddress( - PM_MODULE hModule, - const char *szProcName) -{ - (void)hModule; - (void)szProcName; - return NULL; -} - -void PMAPI PM_freeLibrary( - PM_MODULE hModule) -{ - (void)hModule; -} - -int PMAPI PM_setIOPL( - int level) -{ - return level; -} - -/**************************************************************************** -REMARKS: -Internal function to convert the find data to the generic interface. -****************************************************************************/ -static void convertFindData( - PM_findData *findData, - struct find_t *blk) -{ - ulong dwSize = findData->dwSize; - - memset(findData,0,findData->dwSize); - findData->dwSize = dwSize; - if (blk->attrib & _A_RDONLY) - findData->attrib |= PM_FILE_READONLY; - if (blk->attrib & _A_SUBDIR) - findData->attrib |= PM_FILE_DIRECTORY; - if (blk->attrib & _A_ARCH) - findData->attrib |= PM_FILE_ARCHIVE; - if (blk->attrib & _A_HIDDEN) - findData->attrib |= PM_FILE_HIDDEN; - if (blk->attrib & _A_SYSTEM) - findData->attrib |= PM_FILE_SYSTEM; - findData->sizeLo = blk->size; - strncpy(findData->name,blk->name,PM_MAX_PATH); - findData->name[PM_MAX_PATH-1] = 0; -} - -#define FIND_MASK (_A_RDONLY | _A_ARCH | _A_SUBDIR | _A_HIDDEN | _A_SYSTEM) - -/**************************************************************************** -REMARKS: -Function to find the first file matching a search criteria in a directory. -****************************************************************************/ -void * PMAPI PM_findFirstFile( - const char *filename, - PM_findData *findData) -{ - struct find_t *blk; - - if ((blk = PM_malloc(sizeof(*blk))) == NULL) - return PM_FILE_INVALID; - if (_dos_findfirst((char*)filename,FIND_MASK,blk) == 0) { - convertFindData(findData,blk); - return blk; - } - return PM_FILE_INVALID; -} - -/**************************************************************************** -REMARKS: -Function to find the next file matching a search criteria in a directory. -****************************************************************************/ -ibool PMAPI PM_findNextFile( - void *handle, - PM_findData *findData) -{ - struct find_t *blk = handle; - - if (_dos_findnext(blk) == 0) { - convertFindData(findData,blk); - return true; - } - return false; -} - -/**************************************************************************** -REMARKS: -Function to close the find process -****************************************************************************/ -void PMAPI PM_findClose( - void *handle) -{ - PM_free(handle); -} - -/**************************************************************************** -REMARKS: -Function to determine if a drive is a valid drive or not. Under Unix this -function will return false for anything except a value of 3 (considered -the root drive, and equivalent to C: for non-Unix systems). The drive -numbering is: - - 1 - Drive A: - 2 - Drive B: - 3 - Drive C: - etc - -****************************************************************************/ -ibool PMAPI PM_driveValid( - char drive) -{ - RMREGS regs; - regs.h.dl = (uchar)(drive - 'A' + 1); - regs.h.ah = 0x36; /* Get disk information service */ - PM_int86(0x21,®s,®s); - return regs.x.ax != 0xFFFF; /* AX = 0xFFFF if disk is invalid */ -} - -/**************************************************************************** -REMARKS: -Function to get the current working directory for the specififed drive. -Under Unix this will always return the current working directory regardless -of what the value of 'drive' is. -****************************************************************************/ -void PMAPI PM_getdcwd( - int drive, - char *dir, - int len) -{ - uint oldDrive,maxDrives; - _dos_getdrive(&oldDrive); - _dos_setdrive(drive,&maxDrives); - getcwd(dir,len); - _dos_setdrive(oldDrive,&maxDrives); -} - -/**************************************************************************** -REMARKS: -Function to change the file attributes for a specific file. -****************************************************************************/ -void PMAPI PM_setFileAttr( - const char *filename, - uint attrib) -{ -#if defined(TNT) && defined(_MSC_VER) - DWORD attr = 0; - - if (attrib & PM_FILE_READONLY) - attr |= FILE_ATTRIBUTE_READONLY; - if (attrib & PM_FILE_ARCHIVE) - attr |= FILE_ATTRIBUTE_ARCHIVE; - if (attrib & PM_FILE_HIDDEN) - attr |= FILE_ATTRIBUTE_HIDDEN; - if (attrib & PM_FILE_SYSTEM) - attr |= FILE_ATTRIBUTE_SYSTEM; - SetFileAttributes((LPSTR)filename, attr); -#else - uint attr = 0; - - if (attrib & PM_FILE_READONLY) - attr |= _A_RDONLY; - if (attrib & PM_FILE_ARCHIVE) - attr |= _A_ARCH; - if (attrib & PM_FILE_HIDDEN) - attr |= _A_HIDDEN; - if (attrib & PM_FILE_SYSTEM) - attr |= _A_SYSTEM; - _dos_setfileattr(filename,attr); -#endif -} - -/**************************************************************************** -REMARKS: -Function to create a directory. -****************************************************************************/ -ibool PMAPI PM_mkdir( - const char *filename) -{ -#ifdef __GNUC__ - return mkdir(filename,S_IRUSR) == 0; -#else -/*AM: return mkdir(filename) == 0; */ - return(false); -#endif -} - -/**************************************************************************** -REMARKS: -Function to remove a directory. -****************************************************************************/ -ibool PMAPI PM_rmdir( - const char *filename) -{ -/*AM: return rmdir(filename) == 0; */ - return(false); -} - -/**************************************************************************** -REMARKS: -Allocates a block of locked, physically contiguous memory. The memory -may be required to be below the 16Meg boundary. -****************************************************************************/ -void * PMAPI PM_allocLockedMem( - uint size, - ulong *physAddr, - ibool contiguous, - ibool below16M) -{ - void *p; - uint r_seg,r_off; - PM_lockHandle lh; - - /* Under DOS the only way to know the physical memory address is to - * allocate the memory below the 1Meg boundary as real mode memory. - * We also allocate 4095 bytes more memory than we need, so we can - * properly page align the start of the memory block for DMA operations. - */ - if (size > 4096) - return NULL; - if ((p = PM_allocRealSeg((size + 0xFFF) & ~0xFFF,&r_seg,&r_off)) == NULL) - return NULL; - *physAddr = ((r_seg << 4) + r_off + 0xFFF) & ~0xFFF; - PM_lockDataPages(p,size*2,&lh); - return p; -} - -void PMAPI PM_freeLockedMem(void *p,uint size,ibool contiguous) -{ - (void)size; - PM_freeRealSeg(p); -} - -/*-------------------------------------------------------------------------*/ -/* Generic DPMI routines common to 16/32 bit code */ -/*-------------------------------------------------------------------------*/ - -ulong PMAPI DPMI_mapPhysicalToLinear(ulong physAddr,ulong limit) -{ - PMREGS r; - ulong physOfs; - - if (physAddr < 0x100000L) { - /* We can't map memory below 1Mb, but the linear address are already - * mapped 1:1 for this memory anyway so we just return the base address. - */ - return physAddr; - } - - /* Round the physical address to a 4Kb boundary and the limit to a - * 4Kb-1 boundary before passing the values to DPMI as some extenders - * will fail the calls unless this is the case. If we round the - * physical address, then we also add an extra offset into the address - * that we return. - */ - physOfs = physAddr & 4095; - physAddr = physAddr & ~4095; - limit = ((limit+physOfs+1+4095) & ~4095)-1; - - r.x.ax = 0x800; /* DPMI map physical to linear */ - r.x.bx = physAddr >> 16; - r.x.cx = physAddr & 0xFFFF; - r.x.si = limit >> 16; - r.x.di = limit & 0xFFFF; - PM_int386(0x31, &r, &r); - if (r.x.cflag) - return 0xFFFFFFFFUL; - return ((ulong)r.x.bx << 16) + r.x.cx + physOfs; -} - -int PMAPI DPMI_setSelectorBase(ushort sel,ulong linAddr) -{ - PMREGS r; - - r.x.ax = 7; /* DPMI set selector base address */ - r.x.bx = sel; - r.x.cx = linAddr >> 16; - r.x.dx = linAddr & 0xFFFF; - PM_int386(0x31, &r, &r); - if (r.x.cflag) - return 0; - return 1; -} - -ulong PMAPI DPMI_getSelectorBase(ushort sel) -{ - PMREGS r; - - r.x.ax = 6; /* DPMI get selector base address */ - r.x.bx = sel; - PM_int386(0x31, &r, &r); - return ((ulong)r.x.cx << 16) + r.x.dx; -} - -int PMAPI DPMI_setSelectorLimit(ushort sel,ulong limit) -{ - PMREGS r; - - r.x.ax = 8; /* DPMI set selector limit */ - r.x.bx = sel; - r.x.cx = limit >> 16; - r.x.dx = limit & 0xFFFF; - PM_int386(0x31, &r, &r); - if (r.x.cflag) - return 0; - return 1; -} - -uint PMAPI DPMI_createSelector(ulong base,ulong limit) -{ - uint sel; - PMREGS r; - - /* Allocate 1 descriptor */ - r.x.ax = 0; - r.x.cx = 1; - PM_int386(0x31, &r, &r); - if (r.x.cflag) return 0; - sel = r.x.ax; - - /* Set the descriptor access rights (for a 32 bit page granular - * segment, ring 0). - */ - r.x.ax = 9; - r.x.bx = sel; - r.x.cx = 0x4093; - PM_int386(0x31, &r, &r); - - /* Map physical memory and create selector */ - if ((base = DPMI_mapPhysicalToLinear(base,limit)) == 0xFFFFFFFFUL) - return 0; - if (!DPMI_setSelectorBase(sel,base)) - return 0; - if (!DPMI_setSelectorLimit(sel,limit)) - return 0; - return sel; -} - -void PMAPI DPMI_freeSelector(uint sel) -{ - PMREGS r; - - r.x.ax = 1; - r.x.bx = sel; - PM_int386(0x31, &r, &r); -} - -int PMAPI DPMI_lockLinearPages(ulong linear,ulong len) -{ - PMREGS r; - - r.x.ax = 0x600; /* DPMI Lock Linear Region */ - r.x.bx = (linear >> 16); /* Linear address in BX:CX */ - r.x.cx = (linear & 0xFFFF); - r.x.si = (len >> 16); /* Length in SI:DI */ - r.x.di = (len & 0xFFFF); - PM_int386(0x31, &r, &r); - return (!r.x.cflag); -} - -int PMAPI DPMI_unlockLinearPages(ulong linear,ulong len) -{ - PMREGS r; - - r.x.ax = 0x601; /* DPMI Unlock Linear Region */ - r.x.bx = (linear >> 16); /* Linear address in BX:CX */ - r.x.cx = (linear & 0xFFFF); - r.x.si = (len >> 16); /* Length in SI:DI */ - r.x.di = (len & 0xFFFF); - PM_int386(0x31, &r, &r); - return (!r.x.cflag); -} - -void * PMAPI DPMI_mapPhysicalAddr(ulong base,ulong limit,ibool isCached) -{ - PMSREGS sregs; - ulong linAddr; - ulong DSBaseAddr; - - /* Get the base address for the default DS selector */ - PM_segread(&sregs); - DSBaseAddr = DPMI_getSelectorBase(sregs.ds); - if ((base < 0x100000) && (DSBaseAddr == 0)) { - /* DS is zero based, so we can directly access the first 1Mb of - * system memory (like under DOS4GW). - */ - return (void*)base; - } - - /* Map the memory to a linear address using DPMI function 0x800 */ - if ((linAddr = DPMI_mapPhysicalToLinear(base,limit)) == 0) { - if (base >= 0x100000) - return NULL; - /* If the linear address mapping fails but we are trying to - * map an area in the first 1Mb of system memory, then we must - * be running under a Windows or OS/2 DOS box. Under these - * environments we can use the segment wrap around as a fallback - * measure, as this does work properly. - */ - linAddr = base; - } - - /* Now expand the default DS selector to 4Gb so we can access it */ - if (!DPMI_setSelectorLimit(sregs.ds,0xFFFFFFFFUL)) - return NULL; - - /* Finally enable caching for the page tables that we just mapped in, - * since DOS4GW and PMODE/W create the page table entries without - * caching enabled which hurts the performance of the linear framebuffer - * as it disables write combining on Pentium Pro and above processors. - * - * For those processors cache disabling is better handled through the - * MTRR registers anyway (we can write combine a region but disable - * caching) so that MMIO register regions do not screw up. - */ - if (isCached) { - if ((PDB = _PM_getPDB()) != 0 && DSBaseAddr == 0) { - int startPDB,endPDB,iPDB,startPage,endPage,start,end,iPage; - ulong pageTable,*pPageTable; - if (!pPDB) { - if (PDB >= 0x100000) - pPDB = (ulong*)DPMI_mapPhysicalToLinear(PDB,0xFFF); - else - pPDB = (ulong*)PDB; - } - if (pPDB) { - startPDB = (linAddr >> 22) & 0x3FF; - startPage = (linAddr >> 12) & 0x3FF; - endPDB = ((linAddr+limit) >> 22) & 0x3FF; - endPage = ((linAddr+limit) >> 12) & 0x3FF; - for (iPDB = startPDB; iPDB <= endPDB; iPDB++) { - pageTable = pPDB[iPDB] & ~0xFFF; - if (pageTable >= 0x100000) - pPageTable = (ulong*)DPMI_mapPhysicalToLinear(pageTable,0xFFF); - else - pPageTable = (ulong*)pageTable; - start = (iPDB == startPDB) ? startPage : 0; - end = (iPDB == endPDB) ? endPage : 0x3FF; - for (iPage = start; iPage <= end; iPage++) - pPageTable[iPage] &= ~0x18; - } - } - } - } - - /* Now return the base address of the memory into the default DS */ - return (void*)(linAddr - DSBaseAddr); -} - -/* Some DOS extender implementations do not directly support calling a - * real mode procedure from protected mode. However we can simulate what - * we need temporarily hooking the INT 6Ah vector with a small real mode - * stub that will call our real mode code for us. - */ - -static uchar int6AHandler[] = { - 0x00,0x00,0x00,0x00, /* __PMODE_callReal variable */ - 0xFB, /* sti */ - 0x2E,0xFF,0x1E,0x00,0x00, /* call [cs:__PMODE_callReal] */ - 0xCF, /* iretf */ - }; -static uchar *crPtr = NULL; /* Pointer to of int 6A handler */ -static uint crRSeg,crROff; /* Real mode seg:offset of handler */ - -void PMAPI PM_callRealMode(uint seg,uint off, RMREGS *in, - RMSREGS *sregs) -{ - uchar *p; - uint oldSeg,oldOff; - - if (!crPtr) { - /* Allocate and copy the memory block only once */ - crPtr = PM_allocRealSeg(sizeof(int6AHandler), &crRSeg, &crROff); - memcpy(crPtr,int6AHandler,sizeof(int6AHandler)); - } - PM_setWord(crPtr,off); /* Plug in address to call */ - PM_setWord(crPtr+2,seg); - p = PM_mapRealPointer(0,0x6A * 4); - oldOff = PM_getWord(p); /* Save old handler address */ - oldSeg = PM_getWord(p+2); - PM_setWord(p,crROff+4); /* Hook 6A handler */ - PM_setWord(p+2,crRSeg); - PM_int86x(0x6A, in, in, sregs); /* Call real mode code */ - PM_setWord(p,oldOff); /* Restore old handler */ - PM_setWord(p+2,oldSeg); -} - -void * PMAPI PM_getBIOSPointer(void) -{ return PM_mapPhysicalAddr(0x400,0xFFFF,true); } - -void * PMAPI PM_getA0000Pointer(void) -{ return PM_mapPhysicalAddr(0xA0000,0xFFFF,true); } - -void * PMAPI PM_mapPhysicalAddr(ulong base,ulong limit,ibool isCached) -{ return DPMI_mapPhysicalAddr(base,limit,isCached); } - -void PMAPI PM_freePhysicalAddr(void *ptr,ulong limit) -{ - /* Mapping cannot be free */ -} - -ulong PMAPI PM_getPhysicalAddr(void *p) -{ - /* TODO: This function should find the physical address of a linear */ - /* address. */ - (void)p; - return 0xFFFFFFFFUL; -} - -void * PMAPI PM_mapToProcess(void *base,ulong limit) -{ - (void)limit; - return (void*)base; -} - -void * PMAPI PM_mapRealPointer(uint r_seg,uint r_off) -{ - static uchar *zeroPtr = NULL; - - if (!zeroPtr) - zeroPtr = PM_mapPhysicalAddr(0,0xFFFFF,true); - return (void*)(zeroPtr + MK_PHYS(r_seg,r_off)); -} - -void * PMAPI PM_allocRealSeg(uint size,uint *r_seg,uint *r_off) -{ - PMREGS r; - void *p; - - r.x.ax = 0x100; /* DPMI allocate DOS memory */ - r.x.bx = (size + 0xF) >> 4; /* number of paragraphs */ - PM_int386(0x31, &r, &r); - if (r.x.cflag) - return NULL; /* DPMI call failed */ - *r_seg = r.x.ax; /* Real mode segment */ - *r_off = 0; - p = PM_mapRealPointer(*r_seg,*r_off); - _PM_addRealModeBlock(p,r.x.dx); - return p; -} - -void PMAPI PM_freeRealSeg(void *mem) -{ - PMREGS r; - - r.x.ax = 0x101; /* DPMI free DOS memory */ - r.x.dx = _PM_findRealModeBlock(mem);/* DX := selector from 0x100 */ - PM_int386(0x31, &r, &r); -} - -static DPMI_handler_t DPMI_int10 = NULL; - -void PMAPI DPMI_setInt10Handler(DPMI_handler_t handler) -{ - DPMI_int10 = handler; -} - -void PMAPI DPMI_int86(int intno, DPMI_regs *regs) -{ - PMREGS r; - PMSREGS sr; - - if (intno == 0x10 && DPMI_int10) { - if (DPMI_int10(regs)) - return; - } - PM_segread(&sr); - r.x.ax = 0x300; /* DPMI issue real interrupt */ - r.h.bl = intno; - r.h.bh = 0; - r.x.cx = 0; - sr.es = sr.ds; - r.e.edi = (uint)regs; - PM_int386x(0x31, &r, &r, &sr); /* Issue the interrupt */ -} - -#define IN(reg) rmregs.reg = in->e.reg -#define OUT(reg) out->e.reg = rmregs.reg - -int PMAPI PM_int86(int intno, RMREGS *in, RMREGS *out) -{ - DPMI_regs rmregs; - - memset(&rmregs, 0, sizeof(rmregs)); - IN(eax); IN(ebx); IN(ecx); IN(edx); IN(esi); IN(edi); - -/* These real mode ints may cause crashes. */ -/*AM: DPMI_int86(intno,&rmregs); /###* DPMI issue real interrupt */ - - OUT(eax); OUT(ebx); OUT(ecx); OUT(edx); OUT(esi); OUT(edi); - out->x.cflag = rmregs.flags & 0x1; - return out->x.ax; -} - -int PMAPI PM_int86x(int intno, RMREGS *in, RMREGS *out, - RMSREGS *sregs) -{ - DPMI_regs rmregs; - - memset(&rmregs, 0, sizeof(rmregs)); - IN(eax); IN(ebx); IN(ecx); IN(edx); IN(esi); IN(edi); - rmregs.es = sregs->es; - rmregs.ds = sregs->ds; - -/*AM: DPMI_int86(intno,&rmregs); /###* DPMI issue real interrupt */ - - OUT(eax); OUT(ebx); OUT(ecx); OUT(edx); OUT(esi); OUT(edi); - sregs->es = rmregs.es; - sregs->cs = rmregs.cs; - sregs->ss = rmregs.ss; - sregs->ds = rmregs.ds; - out->x.cflag = rmregs.flags & 0x1; - return out->x.ax; -} - -#pragma pack(1) - -typedef struct { - uint LargestBlockAvail; - uint MaxUnlockedPage; - uint LargestLockablePage; - uint LinAddrSpace; - uint NumFreePagesAvail; - uint NumPhysicalPagesFree; - uint TotalPhysicalPages; - uint FreeLinAddrSpace; - uint SizeOfPageFile; - uint res[3]; - } MemInfo; - -#pragma pack() - -void PMAPI PM_availableMemory(ulong *physical,ulong *total) -{ - PMREGS r; - PMSREGS sr; - MemInfo memInfo; - - PM_segread(&sr); - r.x.ax = 0x500; /* DPMI get free memory info */ - sr.es = sr.ds; - r.e.edi = (uint)&memInfo; - PM_int386x(0x31, &r, &r, &sr); /* Issue the interrupt */ - *physical = memInfo.NumPhysicalPagesFree * 4096; - *total = memInfo.LargestBlockAvail; - if (*total < *physical) - *physical = *total; -} - -/**************************************************************************** -REMARKS: -Function to get the file attributes for a specific file. -****************************************************************************/ -uint PMAPI PM_getFileAttr( - const char *filename) -{ - /* TODO: Implement this! */ - return 0; -} - -/**************************************************************************** -REMARKS: -Function to get the file time and date for a specific file. -****************************************************************************/ -ibool PMAPI PM_getFileTime( - const char *filename, - ibool gmTime, - PM_time *time) -{ - /* TODO: Implement this! */ - return false; -} - -/**************************************************************************** -REMARKS: -Function to set the file time and date for a specific file. -****************************************************************************/ -ibool PMAPI PM_setFileTime( - const char *filename, - ibool gmTime, - PM_time *time) -{ - /* TODO: Implement this! */ - return false; -} |
