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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, 1187 insertions, 0 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 new file mode 100644 index 0000000..d6c95d6 --- /dev/null +++ b/board/MAI/bios_emulator/scitech/src/pm/smx/pm.c @@ -0,0 +1,1187 @@ +/**************************************************************************** +* +* 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; +} |