diff options
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, 0 insertions, 1637 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 deleted file mode 100644 index eecc2daede..0000000000 --- a/board/MAI/bios_emulator/scitech/src/pm/dos/pmdos.c +++ /dev/null @@ -1,1637 +0,0 @@ -/**************************************************************************** -* -* SciTech OS Portability Manager Library -* -* ======================================================================== -* -* The contents of this file are subject to the SciTech MGL Public -* License Version 1.0 (the "License"); you may not use this file -* except in compliance with the License. You may obtain a copy of -* the License at http://www.scitechsoft.com/mgl-license.txt -* -* Software distributed under the License is distributed on an -* "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or -* implied. See the License for the specific language governing -* rights and limitations under the License. -* -* The Original Code is Copyright (C) 1991-1998 SciTech Software, Inc. -* -* The Initial Developer of the Original Code is SciTech Software, Inc. -* All Rights Reserved. -* -* ======================================================================== -* -* Language: ANSI C -* Environment: 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 |
