| /**************************************************************************** |
| * |
| * 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; |
| } |
