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Diffstat (limited to 'board/MAI/bios_emulator/scitech/src/pm/smx/pmsmx.c')
-rw-r--r-- | board/MAI/bios_emulator/scitech/src/pm/smx/pmsmx.c | 471 |
1 files changed, 471 insertions, 0 deletions
diff --git a/board/MAI/bios_emulator/scitech/src/pm/smx/pmsmx.c b/board/MAI/bios_emulator/scitech/src/pm/smx/pmsmx.c new file mode 100644 index 0000000..2596c76 --- /dev/null +++ b/board/MAI/bios_emulator/scitech/src/pm/smx/pmsmx.c @@ -0,0 +1,471 @@ +/**************************************************************************** +* +* 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 <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <dos.h> +#include "smx/ps2mouse.h" + +/*--------------------------- Global variables ----------------------------*/ + +static int globalDataStart; + +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 */ + +/*----------------------------- Implementation ----------------------------*/ + +/* Globals for locking interrupt handlers in _pmsmx.asm */ + +extern int _ASMAPI _PM_pmsmxDataStart; +extern int _ASMAPI _PM_pmsmxDataEnd; +void _ASMAPI _PM_pmsmxCodeStart(void); +void _ASMAPI _PM_pmsmxCodeEnd(void); + +/* Protected mode interrupt handlers, also called by PM callbacks below */ + +void _ASMAPI _PM_timerISR(void); +void _ASMAPI _PM_rtcISR(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 */ + +void _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) +{ + ps2MouseReset(); +} + +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,(_PM_oldCMOSRegA & 0xF0) | (i+3)); + _PM_writeCMOS(0x0B,(_PM_oldCMOSRegB & 0x0F) | 0x40); + } +} + +static void PMAPI lockPMHandlers(void) +{ + static int locked = 0; + int stat = 0; + PM_lockHandle lh; + + /* 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_pmsmxDataStart,(int)&_PM_pmsmxDataEnd - (int)&_PM_pmsmxDataStart,&lh); + stat |= !PM_lockCodePages((__codePtr)_PM_pmsmxCodeStart,(int)_PM_pmsmxCodeEnd-(int)_PM_pmsmxCodeStart,&lh); + if (stat) { + printf("Page locking services failed - interrupt handling not safe!\n"); + exit(1); + } + locked = 1; + } +} + +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); +} + +static long prevRealBreak; /* Previous real mode break handler */ +static long prevRealCtrlC; /* Previous real mode CtrlC handler */ +static long prevRealCritical; /* Prev real mode critical handler */ + +int PMAPI PM_setMouseHandler(int mask, PM_mouseHandler mh) +{ + lockPMHandlers(); /* Ensure our handlers are locked */ + + _PM_mouseHandler = mh; + return 0; +} + +void PMAPI PM_restoreMouseHandler(void) +{ + if (_PM_mouseHandler) + _PM_mouseHandler = NULL; +} + +static void getISR(int intno, PMFARPTR *pmisr, long *realisr) +{ + PM_getPMvect(intno,pmisr); +} + +static void restoreISR(int intno, PMFARPTR pmisr, long 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(PM_IRQ0, &_PM_prevTimer, &_PM_prevRealTimer); + _PM_timerHandler = th; + setISR(PM_IRQ0, _PM_timerISR); +} + +void PMAPI PM_restoreTimerHandler(void) +{ + if (_PM_timerHandler) { + restoreISR(PM_IRQ0, _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(PM_IRQ1, &_PM_prevKey, &_PM_prevRealKey); + _PM_keyHandler = kh; + setISR(PM_IRQ1, _PM_keyISR); +} + +void PMAPI PM_restoreKeyHandler(void) +{ + if (_PM_keyHandler) { + restoreISR(PM_IRQ1, _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. + */ + +static uchar ctrlHandler[] = { + 0x00,0x00,0x00,0x00, /* ctrlBFlag */ + 0x66,0x2E,0xC7,0x06,0x00,0x00, + 0x01,0x00,0x00,0x00, /* mov [cs:ctrlBFlag],1 */ + 0xCF, /* iretf */ + }; + +void PMAPI PM_installAltBreakHandler(PM_breakHandler bh) +{ + uint rseg,roff; + + getISR(0x1B, &_PM_prevBreak, &prevRealBreak); + getISR(0x23, &_PM_prevCtrlC, &prevRealCtrlC); + _PM_breakHandler = bh; + setISR(0x1B, _PM_breakISR); + setISR(0x23, _PM_ctrlCISR); + + /* 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)); +} + +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; + PM_freeRealSeg(_PM_ctrlBPtr); + } +} + +/* 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. + */ + +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 */ + }; + +void PMAPI PM_installAltCriticalHandler(PM_criticalHandler ch) +{ + uint rseg,roff; + + getISR(0x24, &_PM_prevCritical, &prevRealCritical); + _PM_critHandler = ch; + setISR(0x24, _PM_criticalISR); + + /* 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)); +} + +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); +//AM: causes minor glitch with +//AM: older versions pmEasy which don't allow DPMI 06 on +//AM: Code selector 0x0C -- assume base is 0 which it should be. + return DPMI_lockLinearPages((uint)p,len); +} + +int PMAPI PM_unlockCodePages(void (*p)(),uint len,PM_lockHandle *lh) +{ + PMSREGS sregs; + PM_segread(&sregs); + return DPMI_unlockLinearPages((uint)p,len); +} |