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Diffstat (limited to 'board/MAI/bios_emulator/scitech/src/pm/dos/pmdos.c')
| -rw-r--r-- | board/MAI/bios_emulator/scitech/src/pm/dos/pmdos.c | 1637 |
1 files changed, 1637 insertions, 0 deletions
diff --git a/board/MAI/bios_emulator/scitech/src/pm/dos/pmdos.c b/board/MAI/bios_emulator/scitech/src/pm/dos/pmdos.c new file mode 100644 index 0000000000..74f8427a1c --- /dev/null +++ b/board/MAI/bios_emulator/scitech/src/pm/dos/pmdos.c @@ -0,0 +1,1637 @@ +/**************************************************************************** +* +* 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: 16/32 bit DOS +* +* 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 <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <dos.h> + +/*--------------------------- Global variables ----------------------------*/ + +#ifndef REALMODE +static int globalDataStart; +#endif + +PM_criticalHandler _VARAPI _PM_critHandler = NULL; +PM_breakHandler _VARAPI _PM_breakHandler = NULL; +PM_intHandler _VARAPI _PM_timerHandler = NULL; +PM_intHandler _VARAPI _PM_rtcHandler = NULL; +PM_intHandler _VARAPI _PM_keyHandler = NULL; +PM_key15Handler _VARAPI _PM_key15Handler = NULL; +PM_mouseHandler _VARAPI _PM_mouseHandler = NULL; +PM_intHandler _VARAPI _PM_int10Handler = NULL; +int _VARAPI _PM_mouseMask; + +uchar * _VARAPI _PM_ctrlCPtr; /* Location of Ctrl-C flag */ +uchar * _VARAPI _PM_ctrlBPtr; /* Location of Ctrl-Break flag */ +uchar * _VARAPI _PM_critPtr; /* Location of Critical error Bf*/ +PMFARPTR _VARAPI _PM_prevTimer = PMNULL; /* Previous timer handler */ +PMFARPTR _VARAPI _PM_prevRTC = PMNULL; /* Previous RTC handler */ +PMFARPTR _VARAPI _PM_prevKey = PMNULL; /* Previous key handler */ +PMFARPTR _VARAPI _PM_prevKey15 = PMNULL; /* Previous key15 handler */ +PMFARPTR _VARAPI _PM_prevBreak = PMNULL; /* Previous break handler */ +PMFARPTR _VARAPI _PM_prevCtrlC = PMNULL; /* Previous CtrlC handler */ +PMFARPTR _VARAPI _PM_prevCritical = PMNULL; /* Previous critical handler */ +long _VARAPI _PM_prevRealTimer; /* Previous real mode timer */ +long _VARAPI _PM_prevRealRTC; /* Previous real mode RTC */ +long _VARAPI _PM_prevRealKey; /* Previous real mode key */ +long _VARAPI _PM_prevRealKey15; /* Previous real mode key15 */ +long _VARAPI _PM_prevRealInt10; /* Previous real mode int 10h */ +static uchar _PM_oldCMOSRegA; /* CMOS register A contents */ +static uchar _PM_oldCMOSRegB; /* CMOS register B contents */ +static uchar _PM_oldRTCPIC2; /* Mask value for RTC IRQ8 */ + +/* Structure to maintain information about hardware interrupt handlers, + * include a copy of the hardware IRQ assembler thunk (one for each + * hooked interrupt handler). + */ + +typedef struct { + uchar IRQ; + uchar IRQVect; + uchar prevPIC; + uchar prevPIC2; + PMFARPTR prevHandler; + long prevRealhandler; + uchar thunk[1]; + /* IRQ assembler thunk follows ... */ + } _PM_IRQHandle; + +/*----------------------------- Implementation ----------------------------*/ + +/* Globals for locking interrupt handlers in _pmdos.asm */ + +#ifndef REALMODE +extern int _VARAPI _PM_pmdosDataStart; +extern int _VARAPI _PM_pmdosDataEnd; +extern int _VARAPI _PM_DMADataStart; +extern int _VARAPI _PM_DMADataEnd; +void _ASMAPI _PM_pmdosCodeStart(void); +void _ASMAPI _PM_pmdosCodeEnd(void); +void _ASMAPI _PM_DMACodeStart(void); +void _ASMAPI _PM_DMACodeEnd(void); +#endif + +/* Protected mode interrupt handlers, also called by PM callbacks below */ + +void _ASMAPI _PM_timerISR(void); +void _ASMAPI _PM_rtcISR(void); +void _ASMAPI _PM_irqISRTemplate(void); +void _ASMAPI _PM_irqISRTemplateEnd(void); +void _ASMAPI _PM_keyISR(void); +void _ASMAPI _PM_key15ISR(void); +void _ASMAPI _PM_breakISR(void); +void _ASMAPI _PM_ctrlCISR(void); +void _ASMAPI _PM_criticalISR(void); +void _ASMAPI _PM_mouseISR(void); +void _ASMAPI _PM_int10PMCB(void); + +/* Protected mode DPMI callback handlers */ + +void _ASMAPI _PM_mousePMCB(void); + +/* Routine to install a mouse handler function */ + +void _ASMAPI _PM_setMouseHandler(int mask); + +/* Routine to allocate DPMI real mode callback routines */ + +ibool _ASMAPI _DPMI_allocateCallback(void (_ASMAPI *pmcode)(),void *rmregs,long *RMCB); +void _ASMAPI _DPMI_freeCallback(long RMCB); + +/* DPMI helper functions in PMLITE.C */ + +ulong PMAPI DPMI_mapPhysicalToLinear(ulong physAddr,ulong limit); +int PMAPI DPMI_setSelectorBase(ushort sel,ulong linAddr); +ulong PMAPI DPMI_getSelectorBase(ushort sel); +int PMAPI DPMI_setSelectorLimit(ushort sel,ulong limit); +uint PMAPI DPMI_createSelector(ulong base,ulong limit); +void PMAPI DPMI_freeSelector(uint sel); +int PMAPI DPMI_lockLinearPages(ulong linear,ulong len); +int PMAPI DPMI_unlockLinearPages(ulong linear,ulong len); + +/* Functions to read and write CMOS registers */ + +uchar PMAPI _PM_readCMOS(int index); +void PMAPI _PM_writeCMOS(int index,uchar value); + +/*-------------------------------------------------------------------------*/ +/* Generic routines common to all environments */ +/*-------------------------------------------------------------------------*/ + +void PMAPI PM_resetMouseDriver(int hardReset) +{ + RMREGS regs; + PM_mouseHandler oldHandler = _PM_mouseHandler; + + PM_restoreMouseHandler(); + regs.x.ax = hardReset ? 0 : 33; + PM_int86(0x33, ®s, ®s); + if (oldHandler) + PM_setMouseHandler(_PM_mouseMask, oldHandler); +} + +void PMAPI PM_setRealTimeClockFrequency(int frequency) +{ + static short convert[] = { + 8192, + 4096, + 2048, + 1024, + 512, + 256, + 128, + 64, + 32, + 16, + 8, + 4, + 2, + -1, + }; + int i; + + /* First clear any pending RTC timeout if not cleared */ + _PM_readCMOS(0x0C); + if (frequency == 0) { + /* Disable RTC timout */ + _PM_writeCMOS(0x0A,_PM_oldCMOSRegA); + _PM_writeCMOS(0x0B,_PM_oldCMOSRegB & 0x0F); + } + else { + /* Convert frequency value to RTC clock indexes */ + for (i = 0; convert[i] != -1; i++) { + if (convert[i] == frequency) + break; + } + + /* Set RTC timout value and enable timeout */ + _PM_writeCMOS(0x0A,0x20 | (i+3)); + _PM_writeCMOS(0x0B,(_PM_oldCMOSRegB & 0x0F) | 0x40); + } +} + +#ifndef REALMODE + +static void PMAPI lockPMHandlers(void) +{ + static int locked = 0; + int stat; + PM_lockHandle lh; /* Unused in DOS */ + + /* Lock all of the code and data used by our protected mode interrupt + * handling routines, so that it will continue to work correctly + * under real mode. + */ + if (!locked) { + PM_saveDS(); + stat = !PM_lockDataPages(&globalDataStart-2048,4096,&lh); + stat |= !PM_lockDataPages(&_PM_pmdosDataStart,(int)&_PM_pmdosDataEnd - (int)&_PM_pmdosDataStart,&lh); + stat |= !PM_lockCodePages((__codePtr)_PM_pmdosCodeStart,(int)_PM_pmdosCodeEnd-(int)_PM_pmdosCodeStart,&lh); + stat |= !PM_lockDataPages(&_PM_DMADataStart,(int)&_PM_DMADataEnd - (int)&_PM_DMADataStart,&lh); + stat |= !PM_lockCodePages((__codePtr)_PM_DMACodeStart,(int)_PM_DMACodeEnd-(int)_PM_DMACodeStart,&lh); + if (stat) { + printf("Page locking services failed - interrupt handling not safe!\n"); + exit(1); + } + locked = 1; + } +} + +#endif + +/*-------------------------------------------------------------------------*/ +/* DOS Real Mode support. */ +/*-------------------------------------------------------------------------*/ + +#ifdef REALMODE + +#ifndef MK_FP +#define MK_FP(s,o) ( (void far *)( ((ulong)(s) << 16) + \ + (ulong)(o) )) +#endif + +int PMAPI PM_setMouseHandler(int mask, PM_mouseHandler mh) +{ + PM_saveDS(); + _PM_mouseHandler = mh; + _PM_setMouseHandler(_PM_mouseMask = mask); + return 1; +} + +void PMAPI PM_restoreMouseHandler(void) +{ + union REGS regs; + + if (_PM_mouseHandler) { + regs.x.ax = 33; + int86(0x33, ®s, ®s); + _PM_mouseHandler = NULL; + } +} + +void PMAPI PM_setTimerHandler(PM_intHandler th) +{ + _PM_getRMvect(0x8, (long*)&_PM_prevTimer); + _PM_timerHandler = th; + _PM_setRMvect(0x8, (long)_PM_timerISR); +} + +void PMAPI PM_restoreTimerHandler(void) +{ + if (_PM_timerHandler) { + _PM_setRMvect(0x8, (long)_PM_prevTimer); + _PM_timerHandler = NULL; + } +} + +ibool PMAPI PM_setRealTimeClockHandler(PM_intHandler th,int frequency) +{ + /* Save the old CMOS real time clock values */ + _PM_oldCMOSRegA = _PM_readCMOS(0x0A); + _PM_oldCMOSRegB = _PM_readCMOS(0x0B); + + /* Set the real time clock interrupt handler */ + _PM_getRMvect(0x70, (long*)&_PM_prevRTC); + _PM_rtcHandler = th; + _PM_setRMvect(0x70, (long)_PM_rtcISR); + + /* Program the real time clock default frequency */ + PM_setRealTimeClockFrequency(frequency); + + /* Unmask IRQ8 in the PIC2 */ + _PM_oldRTCPIC2 = PM_inpb(0xA1); + PM_outpb(0xA1,_PM_oldRTCPIC2 & 0xFE); + return true; +} + +void PMAPI PM_restoreRealTimeClockHandler(void) +{ + if (_PM_rtcHandler) { + /* Restore CMOS registers and mask RTC clock */ + _PM_writeCMOS(0x0A,_PM_oldCMOSRegA); + _PM_writeCMOS(0x0B,_PM_oldCMOSRegB); + PM_outpb(0xA1,(PM_inpb(0xA1) & 0xFE) | (_PM_oldRTCPIC2 & ~0xFE)); + + /* Restore the interrupt vector */ + _PM_setRMvect(0x70, (long)_PM_prevRTC); + _PM_rtcHandler = NULL; + } +} + +void PMAPI PM_setKeyHandler(PM_intHandler kh) +{ + _PM_getRMvect(0x9, (long*)&_PM_prevKey); + _PM_keyHandler = kh; + _PM_setRMvect(0x9, (long)_PM_keyISR); +} + +void PMAPI PM_restoreKeyHandler(void) +{ + if (_PM_keyHandler) { + _PM_setRMvect(0x9, (long)_PM_prevKey); + _PM_keyHandler = NULL; + } +} + +void PMAPI PM_setKey15Handler(PM_key15Handler kh) +{ + _PM_getRMvect(0x15, (long*)&_PM_prevKey15); + _PM_key15Handler = kh; + _PM_setRMvect(0x15, (long)_PM_key15ISR); +} + +void PMAPI PM_restoreKey15Handler(void) +{ + if (_PM_key15Handler) { + _PM_setRMvect(0x15, (long)_PM_prevKey15); + _PM_key15Handler = NULL; + } +} + +void PMAPI PM_installAltBreakHandler(PM_breakHandler bh) +{ + static int ctrlCFlag,ctrlBFlag; + + _PM_ctrlCPtr = (uchar*)&ctrlCFlag; + _PM_ctrlBPtr = (uchar*)&ctrlBFlag; + _PM_getRMvect(0x1B, (long*)&_PM_prevBreak); + _PM_getRMvect(0x23, (long*)&_PM_prevCtrlC); + _PM_breakHandler = bh; + _PM_setRMvect(0x1B, (long)_PM_breakISR); + _PM_setRMvect(0x23, (long)_PM_ctrlCISR); +} + +void PMAPI PM_installBreakHandler(void) +{ + PM_installAltBreakHandler(NULL); +} + +void PMAPI PM_restoreBreakHandler(void) +{ + if (_PM_prevBreak) { + _PM_setRMvect(0x1B, (long)_PM_prevBreak); + _PM_setRMvect(0x23, (long)_PM_prevCtrlC); + _PM_prevBreak = NULL; + _PM_breakHandler = NULL; + } +} + +void PMAPI PM_installAltCriticalHandler(PM_criticalHandler ch) +{ + static short critBuf[2]; + + _PM_critPtr = (uchar*)critBuf; + _PM_getRMvect(0x24, (long*)&_PM_prevCritical); + _PM_critHandler = ch; + _PM_setRMvect(0x24, (long)_PM_criticalISR); +} + +void PMAPI PM_installCriticalHandler(void) +{ + PM_installAltCriticalHandler(NULL); +} + +void PMAPI PM_restoreCriticalHandler(void) +{ + if (_PM_prevCritical) { + _PM_setRMvect(0x24, (long)_PM_prevCritical); + _PM_prevCritical = NULL; + _PM_critHandler = NULL; + } +} + +int PMAPI PM_lockDataPages(void *p,uint len,PM_lockHandle *lh) +{ + p = p; len = len; /* Do nothing for real mode */ + return 1; +} + +int PMAPI PM_unlockDataPages(void *p,uint len,PM_lockHandle *lh) +{ + p = p; len = len; /* Do nothing for real mode */ + return 1; +} + +int PMAPI PM_lockCodePages(void (*p)(),uint len,PM_lockHandle *lh) +{ + p = p; len = len; /* Do nothing for real mode */ + return 1; +} + +int PMAPI PM_unlockCodePages(void (*p)(),uint len,PM_lockHandle *lh) +{ + p = p; len = len; /* Do nothing for real mode */ + return 1; +} + +void PMAPI PM_getPMvect(int intno, PMFARPTR *isr) +{ + long t; + _PM_getRMvect(intno,&t); + *isr = (void*)t; +} + +void PMAPI PM_setPMvect(int intno, PM_intHandler isr) +{ + PM_saveDS(); + _PM_setRMvect(intno,(long)isr); +} + +void PMAPI PM_restorePMvect(int intno, PMFARPTR isr) +{ + _PM_setRMvect(intno,(long)isr); +} + +#endif + +/*-------------------------------------------------------------------------*/ +/* Phar Lap TNT DOS Extender support. */ +/*-------------------------------------------------------------------------*/ + +#ifdef TNT + +#include <pldos32.h> +#include <pharlap.h> +#include <hw386.h> + +static long prevRealBreak; /* Previous real mode break handler */ +static long prevRealCtrlC; /* Previous real mode CtrlC handler */ +static long prevRealCritical; /* Prev real mode critical handler */ +static uchar *mousePtr; + +/* The following real mode routine is used to call a 32 bit protected + * mode FAR function from real mode. We use this for passing up control + * from the real mode mouse callback to our protected mode code. + */ + +static UCHAR realHandler[] = { /* Real mode code generic handler */ + 0x00,0x00,0x00,0x00, /* __PM_callProtp */ + 0x00,0x00, /* __PM_protCS */ + 0x00,0x00,0x00,0x00, /* __PM_protHandler */ + 0x66,0x60, /* pushad */ + 0x1E, /* push ds */ + 0x6A,0x00, /* push 0 */ + 0x6A,0x00, /* push 0 */ + 0x2E,0xFF,0x36,0x04,0x00, /* push [cs:__PM_protCS] */ + 0x66,0x2E,0xFF,0x36,0x06,0x00, /* push [cs:__PM_protHandler] */ + 0x2E,0xFF,0x1E,0x00,0x00, /* call [cs:__PM_callProtp] */ + 0x83,0xC4,0x0A, /* add sp,10 */ + 0x1F, /* pop ds */ + 0x66,0x61, /* popad */ + 0xCB, /* retf */ + }; + +/* The following functions installs the above realmode callback mechanism + * in real mode memory for calling the protected mode routine. + */ + +uchar * installCallback(void (PMAPI *pmCB)(),uint *rseg, uint *roff) +{ + CONFIG_INF config; + REALPTR realBufAdr,callProtp; + ULONG bufSize; + FARPTR protBufAdr; + uchar *p; + + /* Get address of real mode routine to call up to protected mode */ + _dx_rmlink_get(&callProtp, &realBufAdr, &bufSize, &protBufAdr); + _dx_config_inf(&config, (UCHAR*)&config); + + /* Fill in the values in the real mode code segment so that it will + * call the correct routine. + */ + *((REALPTR*)&realHandler[0]) = callProtp; + *((USHORT*)&realHandler[4]) = config.c_cs_sel; + *((ULONG*)&realHandler[6]) = (ULONG)pmCB; + + /* Copy the real mode handler to real mode memory */ + if ((p = PM_allocRealSeg(sizeof(realHandler),rseg,roff)) == NULL) + return NULL; + memcpy(p,realHandler,sizeof(realHandler)); + + /* Skip past global variabls in real mode code segment */ + *roff += 0x0A; + return p; +} + +int PMAPI PM_setMouseHandler(int mask, PM_mouseHandler mh) +{ + RMREGS regs; + RMSREGS sregs; + uint rseg,roff; + + lockPMHandlers(); /* Ensure our handlers are locked */ + + if ((mousePtr = installCallback(_PM_mouseISR, &rseg, &roff)) == NULL) + return 0; + _PM_mouseHandler = mh; + + /* Install the real mode mouse handler */ + sregs.es = rseg; + regs.x.dx = roff; + regs.x.cx = _PM_mouseMask = mask; + regs.x.ax = 0xC; + PM_int86x(0x33, ®s, ®s, &sregs); + return 1; +} + +void PMAPI PM_restoreMouseHandler(void) +{ + RMREGS regs; + + if (_PM_mouseHandler) { + regs.x.ax = 33; + PM_int86(0x33, ®s, ®s); + PM_freeRealSeg(mousePtr); + _PM_mouseHandler = NULL; + } +} + +void PMAPI PM_getPMvect(int intno, PMFARPTR *isr) +{ + FARPTR ph; + + _dx_pmiv_get(intno, &ph); + isr->sel = FP_SEL(ph); + isr->off = FP_OFF(ph); +} + +void PMAPI PM_setPMvect(int intno, PM_intHandler isr) +{ + CONFIG_INF config; + FARPTR ph; + + PM_saveDS(); + _dx_config_inf(&config, (UCHAR*)&config); + FP_SET(ph,(uint)isr,config.c_cs_sel); + _dx_pmiv_set(intno,ph); +} + +void PMAPI PM_restorePMvect(int intno, PMFARPTR isr) +{ + FARPTR ph; + + FP_SET(ph,isr.off,isr.sel); + _dx_pmiv_set(intno,ph); +} + +static void getISR(int intno, PMFARPTR *pmisr, long *realisr) +{ + PM_getPMvect(intno,pmisr); + _PM_getRMvect(intno, realisr); +} + +static void restoreISR(int intno, PMFARPTR pmisr, long realisr) +{ + _PM_setRMvect(intno,realisr); + PM_restorePMvect(intno,pmisr); +} + +static void setISR(int intno, void (PMAPI *isr)()) +{ + CONFIG_INF config; + FARPTR ph; + + lockPMHandlers(); /* Ensure our handlers are locked */ + + _dx_config_inf(&config, (UCHAR*)&config); + FP_SET(ph,(uint)isr,config.c_cs_sel); + _dx_apmiv_set(intno,ph); +} + +void PMAPI PM_setTimerHandler(PM_intHandler th) +{ + getISR(0x8, &_PM_prevTimer, &_PM_prevRealTimer); + _PM_timerHandler = th; + setISR(0x8, _PM_timerISR); +} + +void PMAPI PM_restoreTimerHandler(void) +{ + if (_PM_timerHandler) { + restoreISR(0x8, _PM_prevTimer, _PM_prevRealTimer); + _PM_timerHandler = NULL; + } +} + +ibool PMAPI PM_setRealTimeClockHandler(PM_intHandler th,int frequency) +{ + /* Save the old CMOS real time clock values */ + _PM_oldCMOSRegA = _PM_readCMOS(0x0A); + _PM_oldCMOSRegB = _PM_readCMOS(0x0B); + + /* Set the real time clock interrupt handler */ + getISR(0x70, &_PM_prevRTC, &_PM_prevRealRTC); + _PM_rtcHandler = th; + setISR(0x70, _PM_rtcISR); + + /* Program the real time clock default frequency */ + PM_setRealTimeClockFrequency(frequency); + + /* Unmask IRQ8 in the PIC2 */ + _PM_oldRTCPIC2 = PM_inpb(0xA1); + PM_outpb(0xA1,_PM_oldRTCPIC2 & 0xFE); + return true; +} + +void PMAPI PM_restoreRealTimeClockHandler(void) +{ + if (_PM_rtcHandler) { + /* Restore CMOS registers and mask RTC clock */ + _PM_writeCMOS(0x0A,_PM_oldCMOSRegA); + _PM_writeCMOS(0x0B,_PM_oldCMOSRegB); + PM_outpb(0xA1,(PM_inpb(0xA1) & 0xFE) | (_PM_oldRTCPIC2 & ~0xFE)); + + /* Restore the interrupt vector */ + restoreISR(0x70, _PM_prevRTC, _PM_prevRealRTC); + _PM_rtcHandler = NULL; + } +} + +void PMAPI PM_setKeyHandler(PM_intHandler kh) +{ + getISR(0x9, &_PM_prevKey, &_PM_prevRealKey); + _PM_keyHandler = kh; + setISR(0x9, _PM_keyISR); +} + +void PMAPI PM_restoreKeyHandler(void) +{ + if (_PM_keyHandler) { + restoreISR(0x9, _PM_prevKey, _PM_prevRealKey); + _PM_keyHandler = NULL; + } +} + +void PMAPI PM_setKey15Handler(PM_key15Handler kh) +{ + getISR(0x15, &_PM_prevKey15, &_PM_prevRealKey15); + _PM_key15Handler = kh; + setISR(0x15, _PM_key15ISR); +} + +void PMAPI PM_restoreKey15Handler(void) +{ + if (_PM_key15Handler) { + restoreISR(0x15, _PM_prevKey15, _PM_prevRealKey15); + _PM_key15Handler = NULL; + } +} + +void PMAPI PM_installAltBreakHandler(PM_breakHandler bh) +{ + static int ctrlCFlag,ctrlBFlag; + + _PM_ctrlCPtr = (uchar*)&ctrlCFlag; + _PM_ctrlBPtr = (uchar*)&ctrlBFlag; + getISR(0x1B, &_PM_prevBreak, &prevRealBreak); + getISR(0x23, &_PM_prevCtrlC, &prevRealCtrlC); + _PM_breakHandler = bh; + setISR(0x1B, _PM_breakISR); + setISR(0x23, _PM_ctrlCISR); +} + +void PMAPI PM_installBreakHandler(void) +{ + PM_installAltBreakHandler(NULL); +} + +void PMAPI PM_restoreBreakHandler(void) +{ + if (_PM_prevBreak.sel) { + restoreISR(0x1B, _PM_prevBreak, prevRealBreak); + restoreISR(0x23, _PM_prevCtrlC, prevRealCtrlC); + _PM_prevBreak.sel = 0; + _PM_breakHandler = NULL; + } +} + +void PMAPI PM_installAltCriticalHandler(PM_criticalHandler ch) +{ + static short critBuf[2]; + + _PM_critPtr = (uchar*)critBuf; + getISR(0x24, &_PM_prevCritical, &prevRealCritical); + _PM_critHandler = ch; + setISR(0x24, _PM_criticalISR); +} + +void PMAPI PM_installCriticalHandler(void) +{ + PM_installAltCriticalHandler(NULL); +} + +void PMAPI PM_restoreCriticalHandler(void) +{ + if (_PM_prevCritical.sel) { + restoreISR(0x24, _PM_prevCritical, prevRealCritical); + _PM_prevCritical.sel = 0; + _PM_critHandler = NULL; + } +} + +int PMAPI PM_lockDataPages(void *p,uint len,PM_lockHandle *lh) +{ + return (_dx_lock_pgsn(p,len) == 0); +} + +int PMAPI PM_unlockDataPages(void *p,uint len,PM_lockHandle *lh) +{ + return (_dx_ulock_pgsn(p,len) == 0); +} + +int PMAPI PM_lockCodePages(void (*p)(),uint len,PM_lockHandle *lh) +{ + CONFIG_INF config; + FARPTR fp; + + _dx_config_inf(&config, (UCHAR*)&config); + FP_SET(fp,p,config.c_cs_sel); + return (_dx_lock_pgs(fp,len) == 0); +} + +int PMAPI PM_unlockCodePages(void (*p)(),uint len,PM_lockHandle *lh) +{ + CONFIG_INF config; + FARPTR fp; + + _dx_config_inf(&config, (UCHAR*)&config); + FP_SET(fp,p,config.c_cs_sel); + return (_dx_ulock_pgs(fp,len) == 0); +} + +#endif + +/*-------------------------------------------------------------------------*/ +/* Symantec C++ DOSX and FlashTek X-32/X-32VM support */ +/*-------------------------------------------------------------------------*/ + +#if defined(DOSX) || defined(X32VM) + +#ifdef X32VM +#include <x32.h> +#endif + +static long prevRealBreak; /* Previous real mode break handler */ +static long prevRealCtrlC; /* Previous real mode CtrlC handler */ +static long prevRealCritical; /* Prev real mode critical handler */ + +static uint mouseSel = 0,mouseOff; + +/* The following real mode routine is used to call a 32 bit protected + * mode FAR function from real mode. We use this for passing up control + * from the real mode mouse callback to our protected mode code. + */ + +static char realHandler[] = { /* Real mode code generic handler */ + 0x00,0x00,0x00,0x00, /* __PM_callProtp */ + 0x00,0x00, /* __PM_protCS */ + 0x00,0x00,0x00,0x00, /* __PM_protHandler */ + 0x1E, /* push ds */ + 0x6A,0x00, /* push 0 */ + 0x6A,0x00, /* push 0 */ + 0x2E,0xFF,0x36,0x04,0x00, /* push [cs:__PM_protCS] */ + 0x66,0x2E,0xFF,0x36,0x06,0x00, /* push [cs:__PM_protHandler] */ + 0x2E,0xFF,0x1E,0x00,0x00, /* call [cs:__PM_callProtp] */ + 0x83,0xC4,0x0A, /* add sp,10 */ + 0x1F, /* pop ds */ + 0xCB, /* retf */ + }; + +/* The following functions installs the above realmode callback mechanism + * in real mode memory for calling the protected mode routine. + */ + +int installCallback(void (PMAPI *pmCB)(),uint *psel, uint *poff, + uint *rseg, uint *roff) +{ + PMREGS regs; + PMSREGS sregs; + + regs.x.ax = 0x250D; + PM_segread(&sregs); + PM_int386x(0x21,®s,®s,&sregs); /* Get RM callback address */ + + /* Fill in the values in the real mode code segment so that it will + * call the correct routine. + */ + *((ulong*)&realHandler[0]) = regs.e.eax; + *((ushort*)&realHandler[4]) = sregs.cs; + *((ulong*)&realHandler[6]) = (ulong)pmCB; + + /* Copy the real mode handler to real mode memory (only allocate the + * buffer once since we cant dealloate it with X32). + */ + if (*psel == 0) { + if (!PM_allocRealSeg(sizeof(realHandler),psel,poff,rseg,roff)) + return 0; + } + PM_memcpyfn(*psel,*poff,realHandler,sizeof(realHandler)); + + /* Skip past global variables in real mode code segment */ + *roff += 0x0A; + return 1; +} + +int PMAPI PM_setMouseHandler(int mask, PM_mouseHandler mh) +{ + RMREGS regs; + RMSREGS sregs; + uint rseg,roff; + + lockPMHandlers(); /* Ensure our handlers are locked */ + + if (!installCallback(_PM_mouseISR, &mouseSel, &mouseOff, &rseg, &roff)) + return 0; + _PM_mouseHandler = mh; + + /* Install the real mode mouse handler */ + sregs.es = rseg; + regs.x.dx = roff; + regs.x.cx = _PM_mouseMask = mask; + regs.x.ax = 0xC; + PM_int86x(0x33, ®s, ®s, &sregs); + return 1; +} + +void PMAPI PM_restoreMouseHandler(void) +{ + RMREGS regs; + + if (_PM_mouseHandler) { + regs.x.ax = 33; + PM_int86(0x33, ®s, ®s); + _PM_mouseHandler = NULL; + } +} + +void PMAPI PM_getPMvect(int intno, PMFARPTR *isr) +{ + PMREGS regs; + PMSREGS sregs; + + PM_segread(&sregs); + regs.x.ax = 0x2502; /* Get PM interrupt vector */ + regs.x.cx = intno; + PM_int386x(0x21, ®s, ®s, &sregs); + isr->sel = sregs.es; + isr->off = regs.e.ebx; +} + +void PMAPI PM_setPMvect(int intno, PM_intHandler isr) +{ + PMFARPTR pmisr; + PMSREGS sregs; + + PM_saveDS(); + PM_segread(&sregs); + pmisr.sel = sregs.cs; + pmisr.off = (uint)isr; + PM_restorePMvect(intno, pmisr); +} + +void PMAPI PM_restorePMvect(int intno, PMFARPTR isr) +{ + PMREGS regs; + PMSREGS sregs; + + PM_segread(&sregs); + regs.x.ax = 0x2505; /* Set PM interrupt vector */ + regs.x.cx = intno; + sregs.ds = isr.sel; + regs.e.edx = isr.off; + PM_int386x(0x21, ®s, ®s, &sregs); +} + +static void getISR(int intno, PMFARPTR *pmisr, long *realisr) +{ + PM_getPMvect(intno,pmisr); + _PM_getRMvect(intno,realisr); +} + +static void restoreISR(int intno, PMFARPTR pmisr, long realisr) +{ + PMREGS regs; + PMSREGS sregs; + + PM_segread(&sregs); + regs.x.ax = 0x2507; /* Set real and PM vectors */ + regs.x.cx = intno; + sregs.ds = pmisr.sel; + regs.e.edx = pmisr.off; + regs.e.ebx = realisr; + PM_int386x(0x21, ®s, ®s, &sregs); +} + +static void setISR(int intno, void *isr) +{ + PMREGS regs; + PMSREGS sregs; + + lockPMHandlers(); /* Ensure our handlers are locked */ + + PM_segread(&sregs); + regs.x.ax = 0x2506; /* Hook real and protected vectors */ + regs.x.cx = intno; + sregs.ds = sregs.cs; + regs.e.edx = (uint)isr; + PM_int386x(0x21, ®s, ®s, &sregs); +} + +void PMAPI PM_setTimerHandler(PM_intHandler th) +{ + getISR(0x8, &_PM_prevTimer, &_PM_prevRealTimer); + _PM_timerHandler = th; + setISR(0x8, _PM_timerISR); +} + +void PMAPI PM_restoreTimerHandler(void) +{ + if (_PM_timerHandler) { + restoreISR(0x8, _PM_prevTimer, _PM_prevRealTimer); + _PM_timerHandler = NULL; + } +} + +ibool PMAPI PM_setRealTimeClockHandler(PM_intHandler th,int frequency) +{ + /* Save the old CMOS real time clock values */ + _PM_oldCMOSRegA = _PM_readCMOS(0x0A); + _PM_oldCMOSRegB = _PM_readCMOS(0x0B); + + /* Set the real time clock interrupt handler */ + getISR(0x70, &_PM_prevRTC, &_PM_prevRealRTC); + _PM_rtcHandler = th; + setISR(0x70, _PM_rtcISR); + + /* Program the real time clock default frequency */ + PM_setRealTimeClockFrequency(frequency); + + /* Unmask IRQ8 in the PIC2 */ + _PM_oldRTCPIC2 = PM_inpb(0xA1); + PM_outpb(0xA1,_PM_oldRTCPIC2 & 0xFE); + return true; +} + +void PMAPI PM_restoreRealTimeClockHandler(void) +{ + if (_PM_rtcHandler) { + /* Restore CMOS registers and mask RTC clock */ + _PM_writeCMOS(0x0A,_PM_oldCMOSRegA); + _PM_writeCMOS(0x0B,_PM_oldCMOSRegB); + PM_outpb(0xA1,(PM_inpb(0xA1) & 0xFE) | (_PM_oldRTCPIC2 & ~0xFE)); + + /* Restore the interrupt vector */ + restoreISR(0x70, _PM_prevRTC, _PM_prevRealRTC); + _PM_rtcHandler = NULL; + } +} + +void PMAPI PM_setKeyHandler(PM_intHandler kh) +{ + getISR(0x9, &_PM_prevKey, &_PM_prevRealKey); + _PM_keyHandler = kh; + setISR(0x9, _PM_keyISR); +} + +void PMAPI PM_restoreKeyHandler(void) +{ + if (_PM_keyHandler) { + restoreISR(0x9, _PM_prevKey, _PM_prevRealKey); + _PM_keyHandler = NULL; + } +} + +void PMAPI PM_setKey15Handler(PM_key15Handler kh) +{ + getISR(0x15, &_PM_prevKey15, &_PM_prevRealKey15); + _PM_key15Handler = kh; + setISR(0x15, _PM_key15ISR); +} + +void PMAPI PM_restoreKey15Handler(void) +{ + if (_PM_key15Handler) { + restoreISR(0x15, _PM_prevKey15, _PM_prevRealKey15); + _PM_key15Handler = NULL; + } +} + +void PMAPI PM_installAltBreakHandler(PM_breakHandler bh) +{ + static int ctrlCFlag,ctrlBFlag; + + _PM_ctrlCPtr = (uchar*)&ctrlCFlag; + _PM_ctrlBPtr = (uchar*)&ctrlBFlag; + getISR(0x1B, &_PM_prevBreak, &prevRealBreak); + getISR(0x23, &_PM_prevCtrlC, &prevRealCtrlC); + _PM_breakHandler = bh; + setISR(0x1B, _PM_breakISR); + setISR(0x23, _PM_ctrlCISR); +} + +void PMAPI PM_installBreakHandler(void) +{ + PM_installAltBreakHandler(NULL); +} + +void PMAPI PM_restoreBreakHandler(void) +{ + if (_PM_prevBreak.sel) { + restoreISR(0x1B, _PM_prevBreak, prevRealBreak); + restoreISR(0x23, _PM_prevCtrlC, prevRealCtrlC); + _PM_prevBreak.sel = 0; + _PM_breakHandler = NULL; + } +} + +void PMAPI PM_installAltCriticalHandler(PM_criticalHandler ch) +{ + static short critBuf[2]; + + _PM_critPtr = (uchar*)critBuf; + getISR(0x24, &_PM_prevCritical, &prevRealCritical); + _PM_critHandler = ch; + setISR(0x24, _PM_criticalISR); +} + +void PMAPI PM_installCriticalHandler(void) +{ + PM_installAltCriticalHandler(NULL); +} + +void PMAPI PM_restoreCriticalHandler(void) +{ + if (_PM_prevCritical.sel) { + restoreISR(0x24, _PM_prevCritical, prevRealCritical); + _PM_prevCritical.sel = 0; + _PM_critHandler = NULL; + } +} + +int PMAPI PM_lockDataPages(void *p,uint len,PM_lockHandle *lh) +{ + return (_x386_memlock(p,len) == 0); +} + +int PMAPI PM_unlockDataPages(void *p,uint len,PM_lockHandle *lh) +{ + return (_x386_memunlock(p,len) == 0); +} + +int PMAPI PM_lockCodePages(void (*p)(),uint len,PM_lockHandle *lh) +{ + return (_x386_memlock(p,len) == 0); +} + +int PMAPI PM_unlockCodePages(void (*p)(),uint len,PM_lockHandle *lh) +{ + return (_x386_memunlock(p,len) == 0); +} + +#endif + +/*-------------------------------------------------------------------------*/ +/* Borland's DPMI32 DOS Power Pack Extender support. */ +/*-------------------------------------------------------------------------*/ + +#ifdef DPMI32 +#define GENERIC_DPMI32 /* Use generic 32 bit DPMI routines */ + +void PMAPI PM_getPMvect(int intno, PMFARPTR *isr) +{ + PMREGS regs; + + regs.x.ax = 0x204; + regs.h.bl = intno; + PM_int386(0x31,®s,®s); + isr->sel = regs.x.cx; + isr->off = regs.e.edx; +} + +void PMAPI PM_setPMvect(int intno, PM_intHandler isr) +{ + PMSREGS sregs; + PMREGS regs; + + PM_saveDS(); + regs.x.ax = 0x205; /* Set protected mode vector */ + regs.h.bl = intno; + PM_segread(&sregs); + regs.x.cx = sregs.cs; + regs.e.edx = (uint)isr; + PM_int386(0x31,®s,®s); +} + +void PMAPI PM_restorePMvect(int intno, PMFARPTR isr) +{ + PMREGS regs; + + regs.x.ax = 0x205; + regs.h.bl = intno; + regs.x.cx = isr.sel; + regs.e.edx = isr.off; + PM_int386(0x31,®s,®s); +} +#endif + +/*-------------------------------------------------------------------------*/ +/* Watcom C/C++ with Rational DOS/4GW support. */ +/*-------------------------------------------------------------------------*/ + +#ifdef DOS4GW +#define GENERIC_DPMI32 /* Use generic 32 bit DPMI routines */ + +#define MOUSE_SUPPORTED /* DOS4GW directly supports mouse */ + +/* We use the normal DOS services to save and restore interrupts handlers + * for Watcom C++, because using the direct DPMI functions does not + * appear to work properly. At least if we use the DPMI functions, we + * dont get the auto-passup feature that we need to correctly trap + * real and protected mode interrupts without installing Bi-model + * interrupt handlers. + */ + +void PMAPI PM_getPMvect(int intno, PMFARPTR *isr) +{ + PMREGS regs; + PMSREGS sregs; + + PM_segread(&sregs); + regs.h.ah = 0x35; + regs.h.al = intno; + PM_int386x(0x21,®s,®s,&sregs); + isr->sel = sregs.es; + isr->off = regs.e.ebx; +} + +void PMAPI PM_setPMvect(int intno, PM_intHandler isr) +{ + PMREGS regs; + PMSREGS sregs; + + PM_saveDS(); + PM_segread(&sregs); + regs.h.ah = 0x25; + regs.h.al = intno; + sregs.ds = sregs.cs; + regs.e.edx = (uint)isr; + PM_int386x(0x21,®s,®s,&sregs); +} + +void PMAPI PM_restorePMvect(int intno, PMFARPTR isr) +{ + PMREGS regs; + PMSREGS sregs; + + PM_segread(&sregs); + regs.h.ah = 0x25; + regs.h.al = intno; + sregs.ds = isr.sel; + regs.e.edx = isr.off; + PM_int386x(0x21,®s,®s,&sregs); +} + +int PMAPI PM_setMouseHandler(int mask, PM_mouseHandler mh) +{ + lockPMHandlers(); /* Ensure our handlers are locked */ + + _PM_mouseHandler = mh; + _PM_setMouseHandler(_PM_mouseMask = mask); + return 1; +} + +void PMAPI PM_restoreMouseHandler(void) +{ + PMREGS regs; + + if (_PM_mouseHandler) { + regs.x.ax = 33; + PM_int386(0x33, ®s, ®s); + _PM_mouseHandler = NULL; + } +} + +#endif + +/*-------------------------------------------------------------------------*/ +/* DJGPP port of GNU C++ support. */ +/*-------------------------------------------------------------------------*/ + +#ifdef DJGPP +#define GENERIC_DPMI32 /* Use generic 32 bit DPMI routines */ + +void PMAPI PM_getPMvect(int intno, PMFARPTR *isr) +{ + PMREGS regs; + + regs.x.ax = 0x204; + regs.h.bl = intno; + PM_int386(0x31,®s,®s); + isr->sel = regs.x.cx; + isr->off = regs.e.edx; +} + +void PMAPI PM_setPMvect(int intno, PM_intHandler isr) +{ + PMSREGS sregs; + PMREGS regs; + + PM_saveDS(); + regs.x.ax = 0x205; /* Set protected mode vector */ + regs.h.bl = intno; + PM_segread(&sregs); + regs.x.cx = sregs.cs; + regs.e.edx = (uint)isr; + PM_int386(0x31,®s,®s); +} + +void PMAPI PM_restorePMvect(int intno, PMFARPTR isr) +{ + PMREGS regs; + + regs.x.ax = 0x205; + regs.h.bl = intno; + regs.x.cx = isr.sel; + regs.e.edx = isr.off; + PM_int386(0x31,®s,®s); +} + +#endif + +/*-------------------------------------------------------------------------*/ +/* Generic 32 bit DPMI routines */ +/*-------------------------------------------------------------------------*/ + +#if defined(GENERIC_DPMI32) + +static long prevRealBreak; /* Previous real mode break handler */ +static long prevRealCtrlC; /* Previous real mode CtrlC handler */ +static long prevRealCritical; /* Prev real mode critical handler */ + +#ifndef MOUSE_SUPPORTED + +/* The following real mode routine is used to call a 32 bit protected + * mode FAR function from real mode. We use this for passing up control + * from the real mode mouse callback to our protected mode code. + */ + +static long mouseRMCB; /* Mouse real mode callback address */ +static uchar *mousePtr; +static char mouseRegs[0x32]; /* Real mode regs for mouse callback */ +static uchar mouseHandler[] = { + 0x00,0x00,0x00,0x00, /* _realRMCB */ + 0x2E,0xFF,0x1E,0x00,0x00, /* call [cs:_realRMCB] */ + 0xCB, /* retf */ + }; + +int PMAPI PM_setMouseHandler(int mask, PM_mouseHandler mh) +{ + RMREGS regs; + RMSREGS sregs; + uint rseg,roff; + + lockPMHandlers(); /* Ensure our handlers are locked */ + + /* Copy the real mode handler to real mode memory */ + if ((mousePtr = PM_allocRealSeg(sizeof(mouseHandler),&rseg,&roff)) == NULL) + return 0; + memcpy(mousePtr,mouseHandler,sizeof(mouseHandler)); + if (!_DPMI_allocateCallback(_PM_mousePMCB, mouseRegs, &mouseRMCB)) + PM_fatalError("Unable to allocate real mode callback!\n"); + PM_setLong(mousePtr,mouseRMCB); + + /* Install the real mode mouse handler */ + _PM_mouseHandler = mh; + sregs.es = rseg; + regs.x.dx = roff+4; + regs.x.cx = _PM_mouseMask = mask; + regs.x.ax = 0xC; + PM_int86x(0x33, ®s, ®s, &sregs); + return 1; +} + +void PMAPI PM_restoreMouseHandler(void) +{ + RMREGS regs; + + if (_PM_mouseHandler) { + regs.x.ax = 33; + PM_int86(0x33, ®s, ®s); + PM_freeRealSeg(mousePtr); + _DPMI_freeCallback(mouseRMCB); + _PM_mouseHandler = NULL; + } +} + +#endif + +static void getISR(int intno, PMFARPTR *pmisr, long *realisr) +{ + PM_getPMvect(intno,pmisr); + _PM_getRMvect(intno,realisr); +} + +static void restoreISR(int intno, PMFARPTR pmisr, long realisr) +{ + _PM_setRMvect(intno,realisr); + PM_restorePMvect(intno,pmisr); +} + +static void setISR(int intno, void (* PMAPI pmisr)()) +{ + lockPMHandlers(); /* Ensure our handlers are locked */ + PM_setPMvect(intno,pmisr); +} + +void PMAPI PM_setTimerHandler(PM_intHandler th) +{ + getISR(0x8, &_PM_prevTimer, &_PM_prevRealTimer); + _PM_timerHandler = th; + setISR(0x8, _PM_timerISR); +} + +void PMAPI PM_restoreTimerHandler(void) +{ + if (_PM_timerHandler) { + restoreISR(0x8, _PM_prevTimer, _PM_prevRealTimer); + _PM_timerHandler = NULL; + } +} + +ibool PMAPI PM_setRealTimeClockHandler(PM_intHandler th,int frequency) +{ + /* Save the old CMOS real time clock values */ + _PM_oldCMOSRegA = _PM_readCMOS(0x0A); + _PM_oldCMOSRegB = _PM_readCMOS(0x0B); + + /* Set the real time clock interrupt handler */ + getISR(0x70, &_PM_prevRTC, &_PM_prevRealRTC); + _PM_rtcHandler = th; + setISR(0x70, _PM_rtcISR); + + /* Program the real time clock default frequency */ + PM_setRealTimeClockFrequency(frequency); + + /* Unmask IRQ8 in the PIC2 */ + _PM_oldRTCPIC2 = PM_inpb(0xA1); + PM_outpb(0xA1,_PM_oldRTCPIC2 & 0xFE); + return true; +} + +void PMAPI PM_restoreRealTimeClockHandler(void) +{ + if (_PM_rtcHandler) { + /* Restore CMOS registers and mask RTC clock */ + _PM_writeCMOS(0x0A,_PM_oldCMOSRegA); + _PM_writeCMOS(0x0B,_PM_oldCMOSRegB); + PM_outpb(0xA1,(PM_inpb(0xA1) & 0xFE) | (_PM_oldRTCPIC2 & ~0xFE)); + + /* Restore the interrupt vector */ + restoreISR(0x70, _PM_prevRTC, _PM_prevRealRTC); + _PM_rtcHandler = NULL; + } +} + +PM_IRQHandle PMAPI PM_setIRQHandler( + int IRQ, + PM_irqHandler ih) +{ + int thunkSize,PICmask,chainPrevious; + ulong offsetAdjust; + _PM_IRQHandle *handle; + + thunkSize = (ulong)_PM_irqISRTemplateEnd - (ulong)_PM_irqISRTemplate; + if ((handle = PM_malloc(sizeof(_PM_IRQHandle) + thunkSize)) == NULL) + return NULL; + handle->IRQ = IRQ; + handle->prevPIC = PM_inpb(0x21); + handle->prevPIC2 = PM_inpb(0xA1); + if (IRQ < 8) { + handle->IRQVect = (IRQ + 8); + PICmask = (1 << IRQ); + chainPrevious = ((handle->prevPIC & PICmask) == 0); + } + else { + handle->IRQVect = (0x60 + IRQ + 8); + PICmask = ((1 << IRQ) | 0x4); + chainPrevious = ((handle->prevPIC2 & (PICmask >> 8)) == 0); + } + + /* Copy and setup the assembler thunk */ + offsetAdjust = (ulong)handle->thunk - (ulong)_PM_irqISRTemplate; + memcpy(handle->thunk,_PM_irqISRTemplate,thunkSize); + *((ulong*)&handle->thunk[2]) = offsetAdjust; + *((ulong*)&handle->thunk[11+0]) = (ulong)ih; + if (chainPrevious) { + *((ulong*)&handle->thunk[11+4]) = handle->prevHandler.off; + *((ulong*)&handle->thunk[11+8]) = handle->prevHandler.sel; + } + else { + *((ulong*)&handle->thunk[11+4]) = 0; + *((ulong*)&handle->thunk[11+8]) = 0; + } + *((ulong*)&handle->thunk[11+12]) = IRQ; + + /* Set the real time clock interrupt handler */ + getISR(handle->IRQVect, &handle->prevHandler, &handle->prevRealhandler); + setISR(handle->IRQVect, (PM_intHandler)handle->thunk); + + /* Unmask the IRQ in the PIC */ + PM_outpb(0xA1,handle->prevPIC2 & ~(PICmask >> 8)); + PM_outpb(0x21,handle->prevPIC & ~PICmask); + return handle; +} + +void PMAPI PM_restoreIRQHandler( + PM_IRQHandle irqHandle) +{ + int PICmask; + _PM_IRQHandle *handle = irqHandle; + + /* Restore PIC mask for the interrupt */ + if (handle->IRQ < 8) + PICmask = (1 << handle->IRQ); + else + PICmask = ((1 << handle->IRQ) | 0x4); + PM_outpb(0xA1,(PM_inpb(0xA1) & ~(PICmask >> 8)) | (handle->prevPIC2 & (PICmask >> 8))); + PM_outpb(0x21,(PM_inpb(0x21) & ~PICmask) | (handle->prevPIC & PICmask)); + + /* Restore the interrupt vector */ + restoreISR(handle->IRQVect, handle->prevHandler, handle->prevRealhandler); + + /* Finally free the thunk */ + PM_free(handle); +} + +void PMAPI PM_setKeyHandler(PM_intHandler kh) +{ + getISR(0x9, &_PM_prevKey, &_PM_prevRealKey); + _PM_keyHandler = kh; + setISR(0x9, _PM_keyISR); +} + +void PMAPI PM_restoreKeyHandler(void) +{ + if (_PM_keyHandler) { + restoreISR(0x9, _PM_prevKey, _PM_prevRealKey); + _PM_keyHandler = NULL; + } +} + +void PMAPI PM_setKey15Handler(PM_key15Handler kh) +{ + getISR(0x15, &_PM_prevKey15, &_PM_prevRealKey15); + _PM_key15Handler = kh; + setISR(0x15, _PM_key15ISR); +} + +void PMAPI PM_restoreKey15Handler(void) +{ + if (_PM_key15Handler) { + restoreISR(0x15, _PM_prevKey15, _PM_prevRealKey15); + _PM_key15Handler = NULL; + } +} + +/* Real mode Ctrl-C and Ctrl-Break handler. This handler simply sets a + * flag in the real mode code segment and exit. We save the location + * of this flag in real mode memory so that both the real mode and + * protected mode code will be modifying the same flags. + */ + +#ifndef DOS4GW +static uchar ctrlHandler[] = { + 0x00,0x00,0x00,0x00, /* ctrlBFlag */ + 0x66,0x2E,0xC7,0x06,0x00,0x00, + 0x01,0x00,0x00,0x00, /* mov [cs:ctrlBFlag],1 */ + 0xCF, /* iretf */ + }; +#endif + +void PMAPI PM_installAltBreakHandler(PM_breakHandler bh) +{ +#ifndef DOS4GW + uint rseg,roff; +#else + static int ctrlCFlag,ctrlBFlag; + + _PM_ctrlCPtr = (uchar*)&ctrlCFlag; + _PM_ctrlBPtr = (uchar*)&ctrlBFlag; +#endif + + getISR(0x1B, &_PM_prevBreak, &prevRealBreak); + getISR(0x23, &_PM_prevCtrlC, &prevRealCtrlC); + _PM_breakHandler = bh; + setISR(0x1B, _PM_breakISR); + setISR(0x23, _PM_ctrlCISR); + +#ifndef DOS4GW + /* Hook the real mode vectors for these handlers, as these are not + * normally reflected by the DPMI server up to protected mode + */ + _PM_ctrlBPtr = PM_allocRealSeg(sizeof(ctrlHandler)*2, &rseg, &roff); + memcpy(_PM_ctrlBPtr,ctrlHandler,sizeof(ctrlHandler)); + memcpy(_PM_ctrlBPtr+sizeof(ctrlHandler),ctrlHandler,sizeof(ctrlHandler)); + _PM_ctrlCPtr = _PM_ctrlBPtr + sizeof(ctrlHandler); + _PM_setRMvect(0x1B,((long)rseg << 16) | (roff+4)); + _PM_setRMvect(0x23,((long)rseg << 16) | (roff+sizeof(ctrlHandler)+4)); +#endif +} + +void PMAPI PM_installBreakHandler(void) +{ + PM_installAltBreakHandler(NULL); +} + +void PMAPI PM_restoreBreakHandler(void) +{ + if (_PM_prevBreak.sel) { + restoreISR(0x1B, _PM_prevBreak, prevRealBreak); + restoreISR(0x23, _PM_prevCtrlC, prevRealCtrlC); + _PM_prevBreak.sel = 0; + _PM_breakHandler = NULL; +#ifndef DOS4GW + PM_freeRealSeg(_PM_ctrlBPtr); +#endif + } +} + +/* Real mode Critical Error handler. This handler simply saves the AX and + * DI values in the real mode code segment and exits. We save the location + * of this flag in real mode memory so that both the real mode and + * protected mode code will be modifying the same flags. + */ + +#ifndef DOS4GW +static uchar criticalHandler[] = { + 0x00,0x00, /* axCode */ + 0x00,0x00, /* diCode */ + 0x2E,0xA3,0x00,0x00, /* mov [cs:axCode],ax */ + 0x2E,0x89,0x3E,0x02,0x00, /* mov [cs:diCode],di */ + 0xB8,0x03,0x00, /* mov ax,3 */ + 0xCF, /* iretf */ + }; +#endif + +void PMAPI PM_installAltCriticalHandler(PM_criticalHandler ch) +{ +#ifndef DOS4GW + uint rseg,roff; +#else + static short critBuf[2]; + + _PM_critPtr = (uchar*)critBuf; +#endif + + getISR(0x24, &_PM_prevCritical, &prevRealCritical); + _PM_critHandler = ch; + setISR(0x24, _PM_criticalISR); + +#ifndef DOS4GW + /* Hook the real mode vector, as this is not normally reflected by the + * DPMI server up to protected mode. + */ + _PM_critPtr = PM_allocRealSeg(sizeof(criticalHandler)*2, &rseg, &roff); + memcpy(_PM_critPtr,criticalHandler,sizeof(criticalHandler)); + _PM_setRMvect(0x24,((long)rseg << 16) | (roff+4)); +#endif +} + +void PMAPI PM_installCriticalHandler(void) +{ + PM_installAltCriticalHandler(NULL); +} + +void PMAPI PM_restoreCriticalHandler(void) +{ + if (_PM_prevCritical.sel) { + restoreISR(0x24, _PM_prevCritical, prevRealCritical); + PM_freeRealSeg(_PM_critPtr); + _PM_prevCritical.sel = 0; + _PM_critHandler = NULL; + } +} + +int PMAPI PM_lockDataPages(void *p,uint len,PM_lockHandle *lh) +{ + PMSREGS sregs; + PM_segread(&sregs); + return DPMI_lockLinearPages((uint)p + DPMI_getSelectorBase(sregs.ds),len); +} + +int PMAPI PM_unlockDataPages(void *p,uint len,PM_lockHandle *lh) +{ + PMSREGS sregs; + PM_segread(&sregs); + return DPMI_unlockLinearPages((uint)p + DPMI_getSelectorBase(sregs.ds),len); +} + +int PMAPI PM_lockCodePages(void (*p)(),uint len,PM_lockHandle *lh) +{ + PMSREGS sregs; + PM_segread(&sregs); + return DPMI_lockLinearPages((uint)p + DPMI_getSelectorBase(sregs.cs),len); +} + +int PMAPI PM_unlockCodePages(void (*p)(),uint len,PM_lockHandle *lh) +{ + PMSREGS sregs; + PM_segread(&sregs); + return DPMI_unlockLinearPages((uint)p + DPMI_getSelectorBase(sregs.cs),len); +} + +#endif |
