1188 lines
31 KiB
C
1188 lines
31 KiB
C
/****************************************************************************
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*
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* SciTech OS Portability Manager Library
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*
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* ========================================================================
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*
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* The contents of this file are subject to the SciTech MGL Public
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* License Version 1.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.scitechsoft.com/mgl-license.txt
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*
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* Software distributed under the License is distributed on an
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* "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is Copyright (C) 1991-1998 SciTech Software, Inc.
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*
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* The Initial Developer of the Original Code is SciTech Software, Inc.
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* All Rights Reserved.
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*
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* ========================================================================
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*
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* Language: ANSI C
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* Environment: 32 bit SMX embedded systems development.
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*
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* Description: Implementation for the OS Portability Manager Library, which
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* contains functions to implement OS specific services in a
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* generic, cross platform API. Porting the OS Portability
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* Manager library is the first step to porting any SciTech
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* products to a new platform.
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*
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****************************************************************************/
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#include "pmapi.h"
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#include "drvlib/os/os.h"
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#include "ztimerc.h"
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#include "event.h"
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#include "mtrr.h"
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#include "pm_help.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <dos.h>
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#include <conio.h>
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#ifdef __GNUC__
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#include <unistd.h>
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#include <sys/nearptr.h>
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#include <sys/stat.h>
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#else
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#include <direct.h>
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#endif
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#ifdef __BORLANDC__
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#pragma warn -par
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#endif
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/*--------------------------- Global variables ----------------------------*/
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typedef struct {
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int oldMode;
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int old50Lines;
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} DOS_stateBuf;
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#define MAX_RM_BLOCKS 10
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static struct {
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void *p;
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uint tag;
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} rmBlocks[MAX_RM_BLOCKS];
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static uint VESABuf_len = 1024; /* Length of the VESABuf buffer */
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static void *VESABuf_ptr = NULL; /* Near pointer to VESABuf */
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static uint VESABuf_rseg; /* Real mode segment of VESABuf */
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static uint VESABuf_roff; /* Real mode offset of VESABuf */
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static void (PMAPIP fatalErrorCleanup)(void) = NULL;
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ushort _VARAPI _PM_savedDS = 0;
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static ulong PDB = 0,*pPDB = NULL;
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static uint VXD_version = -1;
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/*----------------------------- Implementation ----------------------------*/
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ulong _ASMAPI _PM_getPDB(void);
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void _ASMAPI _PM_VxDCall(VXD_regs *regs,uint off,uint sel);
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/****************************************************************************
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REMARKS:
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External function to call the PMHELP helper VxD.
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****************************************************************************/
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void PMAPI PM_VxDCall(
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VXD_regs *regs)
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{
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}
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/****************************************************************************
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RETURNS:
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BCD coded version number of the VxD, or 0 if not loaded (ie: 0x202 - 2.2)
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REMARKS:
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This function gets the version number for the VxD that we have connected to.
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****************************************************************************/
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uint PMAPI PMHELP_getVersion(void)
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{
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return VXD_version = 0;
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}
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void PMAPI PM_init(void)
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{
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#ifndef REALMODE
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MTRR_init();
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#endif
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}
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/****************************************************************************
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PARAMETERS:
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base - The starting physical base address of the region
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size - The size in bytes of the region
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type - Type to place into the MTRR register
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RETURNS:
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Error code describing the result.
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REMARKS:
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Function to enable write combining for the specified region of memory.
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****************************************************************************/
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int PMAPI PM_enableWriteCombine(
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ulong base,
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ulong size,
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uint type)
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{
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#ifndef REALMODE
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return MTRR_enableWriteCombine(base,size,type);
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#else
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return PM_MTRR_NOT_SUPPORTED;
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#endif
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}
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ibool PMAPI PM_haveBIOSAccess(void)
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{ return false; }
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long PMAPI PM_getOSType(void)
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{ return _OS_SMX; }
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int PMAPI PM_getModeType(void)
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{ return PM_386; }
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void PMAPI PM_backslash(char *s)
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{
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uint pos = strlen(s);
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if (s[pos-1] != '\\') {
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s[pos] = '\\';
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s[pos+1] = '\0';
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}
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}
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void PMAPI PM_setFatalErrorCleanup(
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void (PMAPIP cleanup)(void))
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{
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fatalErrorCleanup = cleanup;
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}
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void MGLOutput(char *);
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void PMAPI PM_fatalError(const char *msg)
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{
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if (fatalErrorCleanup)
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fatalErrorCleanup();
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MGLOutput(msg);
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/* No support for fprintf() under smx currently! */
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/* fprintf(stderr,"%s\n", msg); */
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exit(1);
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}
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static void ExitVBEBuf(void)
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{
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if (VESABuf_ptr)
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PM_freeRealSeg(VESABuf_ptr);
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VESABuf_ptr = 0;
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}
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void * PMAPI PM_getVESABuf(uint *len,uint *rseg,uint *roff)
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{
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if (!VESABuf_ptr) {
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/* Allocate a global buffer for communicating with the VESA VBE */
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if ((VESABuf_ptr = PM_allocRealSeg(VESABuf_len, &VESABuf_rseg, &VESABuf_roff)) == NULL)
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return NULL;
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atexit(ExitVBEBuf);
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}
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*len = VESABuf_len;
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*rseg = VESABuf_rseg;
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*roff = VESABuf_roff;
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return VESABuf_ptr;
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}
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int PMAPI PM_int386(int intno, PMREGS *in, PMREGS *out)
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{
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PMSREGS sregs;
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PM_segread(&sregs);
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return PM_int386x(intno,in,out,&sregs);
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}
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/* Routines to set and get the real mode interrupt vectors, by making
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* direct real mode calls to DOS and bypassing the DOS extenders API.
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* This is the safest way to handle this, as some servers try to be
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* smart about changing real mode vectors.
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*/
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void PMAPI _PM_getRMvect(int intno, long *realisr)
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{
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RMREGS regs;
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RMSREGS sregs;
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PM_saveDS();
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regs.h.ah = 0x35;
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regs.h.al = intno;
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PM_int86x(0x21, ®s, ®s, &sregs);
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*realisr = ((long)sregs.es << 16) | regs.x.bx;
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}
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void PMAPI _PM_setRMvect(int intno, long realisr)
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{
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RMREGS regs;
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RMSREGS sregs;
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PM_saveDS();
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regs.h.ah = 0x25;
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regs.h.al = intno;
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sregs.ds = (int)(realisr >> 16);
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regs.x.dx = (int)(realisr & 0xFFFF);
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PM_int86x(0x21, ®s, ®s, &sregs);
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}
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void PMAPI _PM_addRealModeBlock(void *mem,uint tag)
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{
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int i;
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for (i = 0; i < MAX_RM_BLOCKS; i++) {
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if (rmBlocks[i].p == NULL) {
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rmBlocks[i].p = mem;
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rmBlocks[i].tag = tag;
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return;
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}
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}
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PM_fatalError("To many real mode memory block allocations!");
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}
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uint PMAPI _PM_findRealModeBlock(void *mem)
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{
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int i;
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for (i = 0; i < MAX_RM_BLOCKS; i++) {
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if (rmBlocks[i].p == mem)
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return rmBlocks[i].tag;
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}
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PM_fatalError("Could not find prior real mode memory block allocation!");
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return 0;
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}
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char * PMAPI PM_getCurrentPath(
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char *path,
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int maxLen)
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{
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return getcwd(path,maxLen);
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}
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char PMAPI PM_getBootDrive(void)
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{ return 'C'; }
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const char * PMAPI PM_getVBEAFPath(void)
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{ return "c:\\"; }
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const char * PMAPI PM_getNucleusPath(void)
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{
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static char path[256];
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char *env;
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if ((env = getenv("NUCLEUS_PATH")) != NULL)
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return env;
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return "c:\\nucleus";
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}
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const char * PMAPI PM_getNucleusConfigPath(void)
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{
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static char path[256];
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strcpy(path,PM_getNucleusPath());
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PM_backslash(path);
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strcat(path,"config");
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return path;
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}
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const char * PMAPI PM_getUniqueID(void)
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{ return "SMX"; }
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const char * PMAPI PM_getMachineName(void)
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{ return "SMX"; }
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int PMAPI PM_kbhit(void)
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{
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int hit;
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event_t evt;
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hit = EVT_peekNext(&evt,EVT_KEYDOWN | EVT_KEYREPEAT);
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EVT_flush(~(EVT_KEYDOWN | EVT_KEYREPEAT));
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return hit;
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}
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int PMAPI PM_getch(void)
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{
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event_t evt;
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EVT_halt(&evt,EVT_KEYDOWN);
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return EVT_asciiCode(evt.message);
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}
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PM_HWND PMAPI PM_openConsole(PM_HWND hwndUser,int device,int xRes,int yRes,int bpp,ibool fullScreen)
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{
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/* Not used for SMX */
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(void)hwndUser;
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(void)device;
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(void)xRes;
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(void)yRes;
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(void)bpp;
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(void)fullScreen;
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return 0;
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}
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int PMAPI PM_getConsoleStateSize(void)
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{
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return sizeof(DOS_stateBuf);
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}
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void PMAPI PM_saveConsoleState(void *stateBuf,PM_HWND hwndConsole)
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{
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RMREGS regs;
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DOS_stateBuf *sb = stateBuf;
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/* Save the old video mode state */
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regs.h.ah = 0x0F;
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PM_int86(0x10,®s,®s);
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sb->oldMode = regs.h.al & 0x7F;
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sb->old50Lines = false;
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if (sb->oldMode == 0x3) {
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regs.x.ax = 0x1130;
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regs.x.bx = 0;
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regs.x.dx = 0;
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PM_int86(0x10,®s,®s);
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sb->old50Lines = (regs.h.dl == 42 || regs.h.dl == 49);
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}
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(void)hwndConsole;
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}
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void PMAPI PM_setSuspendAppCallback(int (_ASMAPIP saveState)(int flags))
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{
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/* Not used for SMX */
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(void)saveState;
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}
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void PMAPI PM_restoreConsoleState(const void *stateBuf,PM_HWND hwndConsole)
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{
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RMREGS regs;
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const DOS_stateBuf *sb = stateBuf;
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/* Retore 50 line mode if set */
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if (sb->old50Lines) {
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regs.x.ax = 0x1112;
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regs.x.bx = 0;
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PM_int86(0x10,®s,®s);
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}
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(void)hwndConsole;
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}
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void PMAPI PM_closeConsole(PM_HWND hwndConsole)
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{
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/* Not used for SMX */
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(void)hwndConsole;
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}
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void PMAPI PM_setOSCursorLocation(int x,int y)
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{
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uchar *_biosPtr = PM_getBIOSPointer();
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PM_setByte(_biosPtr+0x50,x);
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PM_setByte(_biosPtr+0x51,y);
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}
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void PMAPI PM_setOSScreenWidth(int width,int height)
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{
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uchar *_biosPtr = PM_getBIOSPointer();
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PM_setWord(_biosPtr+0x4A,width);
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PM_setWord(_biosPtr+0x4C,width*2);
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PM_setByte(_biosPtr+0x84,height-1);
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if (height > 25) {
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PM_setWord(_biosPtr+0x60,0x0607);
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PM_setByte(_biosPtr+0x85,0x08);
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}
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else {
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PM_setWord(_biosPtr+0x60,0x0D0E);
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PM_setByte(_biosPtr+0x85,0x016);
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}
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}
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void * PMAPI PM_mallocShared(long size)
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{
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return PM_malloc(size);
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}
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void PMAPI PM_freeShared(void *ptr)
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{
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PM_free(ptr);
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}
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#define GetRMVect(intno,isr) *(isr) = ((ulong*)rmZeroPtr)[intno]
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#define SetRMVect(intno,isr) ((ulong*)rmZeroPtr)[intno] = (isr)
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ibool PMAPI PM_doBIOSPOST(
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ushort axVal,
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ulong BIOSPhysAddr,
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void *mappedBIOS,
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ulong BIOSLen)
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{
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static int firstTime = true;
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static uchar *rmZeroPtr;
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long Current10,Current6D,Current42;
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RMREGS regs;
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RMSREGS sregs;
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/* Create a zero memory mapping for us to use */
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if (firstTime) {
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rmZeroPtr = PM_mapPhysicalAddr(0,0x7FFF,true);
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firstTime = false;
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}
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/* Remap the secondary BIOS to 0xC0000 physical */
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if (BIOSPhysAddr != 0xC0000L || BIOSLen > 32768) {
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/* SMX cannot virtually remap the BIOS, so we can only work if all
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* the secondary controllers are identical, and we then use the
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* BIOS on the first controller for all the remaining controllers.
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*
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* For OS'es that do virtual memory, and remapping of 0xC0000
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* physical (perhaps a copy on write mapping) should be all that
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* is needed.
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*/
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return false;
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}
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/* Save current handlers of int 10h and 6Dh */
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GetRMVect(0x10,&Current10);
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GetRMVect(0x6D,&Current6D);
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/* POST the secondary BIOS */
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GetRMVect(0x42,&Current42);
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SetRMVect(0x10,Current42); /* Restore int 10h to STD-BIOS */
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regs.x.ax = axVal;
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PM_callRealMode(0xC000,0x0003,®s,&sregs);
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/* Restore current handlers */
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SetRMVect(0x10,Current10);
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SetRMVect(0x6D,Current6D);
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/* Second the primary BIOS mappin 1:1 for 0xC0000 physical */
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if (BIOSPhysAddr != 0xC0000L) {
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/* SMX does not support this */
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(void)mappedBIOS;
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}
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return true;
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}
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void PMAPI PM_sleep(ulong milliseconds)
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{
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ulong microseconds = milliseconds * 1000L;
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LZTimerObject tm;
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LZTimerOnExt(&tm);
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while (LZTimerLapExt(&tm) < microseconds)
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;
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LZTimerOffExt(&tm);
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}
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int PMAPI PM_getCOMPort(int port)
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{
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switch (port) {
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case 0: return 0x3F8;
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case 1: return 0x2F8;
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}
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return 0;
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}
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int PMAPI PM_getLPTPort(int port)
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{
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switch (port) {
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case 0: return 0x3BC;
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case 1: return 0x378;
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case 2: return 0x278;
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}
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return 0;
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}
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|
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PM_MODULE PMAPI PM_loadLibrary(
|
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const char *szDLLName)
|
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{
|
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(void)szDLLName;
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return NULL;
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}
|
|
|
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void * PMAPI PM_getProcAddress(
|
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PM_MODULE hModule,
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const char *szProcName)
|
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{
|
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(void)hModule;
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(void)szProcName;
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return NULL;
|
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}
|
|
|
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void PMAPI PM_freeLibrary(
|
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PM_MODULE hModule)
|
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{
|
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(void)hModule;
|
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}
|
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|
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int PMAPI PM_setIOPL(
|
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int level)
|
|
{
|
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return level;
|
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}
|
|
|
|
/****************************************************************************
|
|
REMARKS:
|
|
Internal function to convert the find data to the generic interface.
|
|
****************************************************************************/
|
|
static void convertFindData(
|
|
PM_findData *findData,
|
|
struct find_t *blk)
|
|
{
|
|
ulong dwSize = findData->dwSize;
|
|
|
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memset(findData,0,findData->dwSize);
|
|
findData->dwSize = dwSize;
|
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if (blk->attrib & _A_RDONLY)
|
|
findData->attrib |= PM_FILE_READONLY;
|
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if (blk->attrib & _A_SUBDIR)
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findData->attrib |= PM_FILE_DIRECTORY;
|
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if (blk->attrib & _A_ARCH)
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findData->attrib |= PM_FILE_ARCHIVE;
|
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if (blk->attrib & _A_HIDDEN)
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findData->attrib |= PM_FILE_HIDDEN;
|
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if (blk->attrib & _A_SYSTEM)
|
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findData->attrib |= PM_FILE_SYSTEM;
|
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findData->sizeLo = blk->size;
|
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strncpy(findData->name,blk->name,PM_MAX_PATH);
|
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findData->name[PM_MAX_PATH-1] = 0;
|
|
}
|
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|
|
#define FIND_MASK (_A_RDONLY | _A_ARCH | _A_SUBDIR | _A_HIDDEN | _A_SYSTEM)
|
|
|
|
/****************************************************************************
|
|
REMARKS:
|
|
Function to find the first file matching a search criteria in a directory.
|
|
****************************************************************************/
|
|
void * PMAPI PM_findFirstFile(
|
|
const char *filename,
|
|
PM_findData *findData)
|
|
{
|
|
struct find_t *blk;
|
|
|
|
if ((blk = PM_malloc(sizeof(*blk))) == NULL)
|
|
return PM_FILE_INVALID;
|
|
if (_dos_findfirst((char*)filename,FIND_MASK,blk) == 0) {
|
|
convertFindData(findData,blk);
|
|
return blk;
|
|
}
|
|
return PM_FILE_INVALID;
|
|
}
|
|
|
|
/****************************************************************************
|
|
REMARKS:
|
|
Function to find the next file matching a search criteria in a directory.
|
|
****************************************************************************/
|
|
ibool PMAPI PM_findNextFile(
|
|
void *handle,
|
|
PM_findData *findData)
|
|
{
|
|
struct find_t *blk = handle;
|
|
|
|
if (_dos_findnext(blk) == 0) {
|
|
convertFindData(findData,blk);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/****************************************************************************
|
|
REMARKS:
|
|
Function to close the find process
|
|
****************************************************************************/
|
|
void PMAPI PM_findClose(
|
|
void *handle)
|
|
{
|
|
PM_free(handle);
|
|
}
|
|
|
|
/****************************************************************************
|
|
REMARKS:
|
|
Function to determine if a drive is a valid drive or not. Under Unix this
|
|
function will return false for anything except a value of 3 (considered
|
|
the root drive, and equivalent to C: for non-Unix systems). The drive
|
|
numbering is:
|
|
|
|
1 - Drive A:
|
|
2 - Drive B:
|
|
3 - Drive C:
|
|
etc
|
|
|
|
****************************************************************************/
|
|
ibool PMAPI PM_driveValid(
|
|
char drive)
|
|
{
|
|
RMREGS regs;
|
|
regs.h.dl = (uchar)(drive - 'A' + 1);
|
|
regs.h.ah = 0x36; /* Get disk information service */
|
|
PM_int86(0x21,®s,®s);
|
|
return regs.x.ax != 0xFFFF; /* AX = 0xFFFF if disk is invalid */
|
|
}
|
|
|
|
/****************************************************************************
|
|
REMARKS:
|
|
Function to get the current working directory for the specififed drive.
|
|
Under Unix this will always return the current working directory regardless
|
|
of what the value of 'drive' is.
|
|
****************************************************************************/
|
|
void PMAPI PM_getdcwd(
|
|
int drive,
|
|
char *dir,
|
|
int len)
|
|
{
|
|
uint oldDrive,maxDrives;
|
|
_dos_getdrive(&oldDrive);
|
|
_dos_setdrive(drive,&maxDrives);
|
|
getcwd(dir,len);
|
|
_dos_setdrive(oldDrive,&maxDrives);
|
|
}
|
|
|
|
/****************************************************************************
|
|
REMARKS:
|
|
Function to change the file attributes for a specific file.
|
|
****************************************************************************/
|
|
void PMAPI PM_setFileAttr(
|
|
const char *filename,
|
|
uint attrib)
|
|
{
|
|
#if defined(TNT) && defined(_MSC_VER)
|
|
DWORD attr = 0;
|
|
|
|
if (attrib & PM_FILE_READONLY)
|
|
attr |= FILE_ATTRIBUTE_READONLY;
|
|
if (attrib & PM_FILE_ARCHIVE)
|
|
attr |= FILE_ATTRIBUTE_ARCHIVE;
|
|
if (attrib & PM_FILE_HIDDEN)
|
|
attr |= FILE_ATTRIBUTE_HIDDEN;
|
|
if (attrib & PM_FILE_SYSTEM)
|
|
attr |= FILE_ATTRIBUTE_SYSTEM;
|
|
SetFileAttributes((LPSTR)filename, attr);
|
|
#else
|
|
uint attr = 0;
|
|
|
|
if (attrib & PM_FILE_READONLY)
|
|
attr |= _A_RDONLY;
|
|
if (attrib & PM_FILE_ARCHIVE)
|
|
attr |= _A_ARCH;
|
|
if (attrib & PM_FILE_HIDDEN)
|
|
attr |= _A_HIDDEN;
|
|
if (attrib & PM_FILE_SYSTEM)
|
|
attr |= _A_SYSTEM;
|
|
_dos_setfileattr(filename,attr);
|
|
#endif
|
|
}
|
|
|
|
/****************************************************************************
|
|
REMARKS:
|
|
Function to create a directory.
|
|
****************************************************************************/
|
|
ibool PMAPI PM_mkdir(
|
|
const char *filename)
|
|
{
|
|
#ifdef __GNUC__
|
|
return mkdir(filename,S_IRUSR) == 0;
|
|
#else
|
|
/*AM: return mkdir(filename) == 0; */
|
|
return(false);
|
|
#endif
|
|
}
|
|
|
|
/****************************************************************************
|
|
REMARKS:
|
|
Function to remove a directory.
|
|
****************************************************************************/
|
|
ibool PMAPI PM_rmdir(
|
|
const char *filename)
|
|
{
|
|
/*AM: return rmdir(filename) == 0; */
|
|
return(false);
|
|
}
|
|
|
|
/****************************************************************************
|
|
REMARKS:
|
|
Allocates a block of locked, physically contiguous memory. The memory
|
|
may be required to be below the 16Meg boundary.
|
|
****************************************************************************/
|
|
void * PMAPI PM_allocLockedMem(
|
|
uint size,
|
|
ulong *physAddr,
|
|
ibool contiguous,
|
|
ibool below16M)
|
|
{
|
|
void *p;
|
|
uint r_seg,r_off;
|
|
PM_lockHandle lh;
|
|
|
|
/* Under DOS the only way to know the physical memory address is to
|
|
* allocate the memory below the 1Meg boundary as real mode memory.
|
|
* We also allocate 4095 bytes more memory than we need, so we can
|
|
* properly page align the start of the memory block for DMA operations.
|
|
*/
|
|
if (size > 4096)
|
|
return NULL;
|
|
if ((p = PM_allocRealSeg((size + 0xFFF) & ~0xFFF,&r_seg,&r_off)) == NULL)
|
|
return NULL;
|
|
*physAddr = ((r_seg << 4) + r_off + 0xFFF) & ~0xFFF;
|
|
PM_lockDataPages(p,size*2,&lh);
|
|
return p;
|
|
}
|
|
|
|
void PMAPI PM_freeLockedMem(void *p,uint size,ibool contiguous)
|
|
{
|
|
(void)size;
|
|
PM_freeRealSeg(p);
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
/* Generic DPMI routines common to 16/32 bit code */
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
ulong PMAPI DPMI_mapPhysicalToLinear(ulong physAddr,ulong limit)
|
|
{
|
|
PMREGS r;
|
|
ulong physOfs;
|
|
|
|
if (physAddr < 0x100000L) {
|
|
/* We can't map memory below 1Mb, but the linear address are already
|
|
* mapped 1:1 for this memory anyway so we just return the base address.
|
|
*/
|
|
return physAddr;
|
|
}
|
|
|
|
/* Round the physical address to a 4Kb boundary and the limit to a
|
|
* 4Kb-1 boundary before passing the values to DPMI as some extenders
|
|
* will fail the calls unless this is the case. If we round the
|
|
* physical address, then we also add an extra offset into the address
|
|
* that we return.
|
|
*/
|
|
physOfs = physAddr & 4095;
|
|
physAddr = physAddr & ~4095;
|
|
limit = ((limit+physOfs+1+4095) & ~4095)-1;
|
|
|
|
r.x.ax = 0x800; /* DPMI map physical to linear */
|
|
r.x.bx = physAddr >> 16;
|
|
r.x.cx = physAddr & 0xFFFF;
|
|
r.x.si = limit >> 16;
|
|
r.x.di = limit & 0xFFFF;
|
|
PM_int386(0x31, &r, &r);
|
|
if (r.x.cflag)
|
|
return 0xFFFFFFFFUL;
|
|
return ((ulong)r.x.bx << 16) + r.x.cx + physOfs;
|
|
}
|
|
|
|
int PMAPI DPMI_setSelectorBase(ushort sel,ulong linAddr)
|
|
{
|
|
PMREGS r;
|
|
|
|
r.x.ax = 7; /* DPMI set selector base address */
|
|
r.x.bx = sel;
|
|
r.x.cx = linAddr >> 16;
|
|
r.x.dx = linAddr & 0xFFFF;
|
|
PM_int386(0x31, &r, &r);
|
|
if (r.x.cflag)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
ulong PMAPI DPMI_getSelectorBase(ushort sel)
|
|
{
|
|
PMREGS r;
|
|
|
|
r.x.ax = 6; /* DPMI get selector base address */
|
|
r.x.bx = sel;
|
|
PM_int386(0x31, &r, &r);
|
|
return ((ulong)r.x.cx << 16) + r.x.dx;
|
|
}
|
|
|
|
int PMAPI DPMI_setSelectorLimit(ushort sel,ulong limit)
|
|
{
|
|
PMREGS r;
|
|
|
|
r.x.ax = 8; /* DPMI set selector limit */
|
|
r.x.bx = sel;
|
|
r.x.cx = limit >> 16;
|
|
r.x.dx = limit & 0xFFFF;
|
|
PM_int386(0x31, &r, &r);
|
|
if (r.x.cflag)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
uint PMAPI DPMI_createSelector(ulong base,ulong limit)
|
|
{
|
|
uint sel;
|
|
PMREGS r;
|
|
|
|
/* Allocate 1 descriptor */
|
|
r.x.ax = 0;
|
|
r.x.cx = 1;
|
|
PM_int386(0x31, &r, &r);
|
|
if (r.x.cflag) return 0;
|
|
sel = r.x.ax;
|
|
|
|
/* Set the descriptor access rights (for a 32 bit page granular
|
|
* segment, ring 0).
|
|
*/
|
|
r.x.ax = 9;
|
|
r.x.bx = sel;
|
|
r.x.cx = 0x4093;
|
|
PM_int386(0x31, &r, &r);
|
|
|
|
/* Map physical memory and create selector */
|
|
if ((base = DPMI_mapPhysicalToLinear(base,limit)) == 0xFFFFFFFFUL)
|
|
return 0;
|
|
if (!DPMI_setSelectorBase(sel,base))
|
|
return 0;
|
|
if (!DPMI_setSelectorLimit(sel,limit))
|
|
return 0;
|
|
return sel;
|
|
}
|
|
|
|
void PMAPI DPMI_freeSelector(uint sel)
|
|
{
|
|
PMREGS r;
|
|
|
|
r.x.ax = 1;
|
|
r.x.bx = sel;
|
|
PM_int386(0x31, &r, &r);
|
|
}
|
|
|
|
int PMAPI DPMI_lockLinearPages(ulong linear,ulong len)
|
|
{
|
|
PMREGS r;
|
|
|
|
r.x.ax = 0x600; /* DPMI Lock Linear Region */
|
|
r.x.bx = (linear >> 16); /* Linear address in BX:CX */
|
|
r.x.cx = (linear & 0xFFFF);
|
|
r.x.si = (len >> 16); /* Length in SI:DI */
|
|
r.x.di = (len & 0xFFFF);
|
|
PM_int386(0x31, &r, &r);
|
|
return (!r.x.cflag);
|
|
}
|
|
|
|
int PMAPI DPMI_unlockLinearPages(ulong linear,ulong len)
|
|
{
|
|
PMREGS r;
|
|
|
|
r.x.ax = 0x601; /* DPMI Unlock Linear Region */
|
|
r.x.bx = (linear >> 16); /* Linear address in BX:CX */
|
|
r.x.cx = (linear & 0xFFFF);
|
|
r.x.si = (len >> 16); /* Length in SI:DI */
|
|
r.x.di = (len & 0xFFFF);
|
|
PM_int386(0x31, &r, &r);
|
|
return (!r.x.cflag);
|
|
}
|
|
|
|
void * PMAPI DPMI_mapPhysicalAddr(ulong base,ulong limit,ibool isCached)
|
|
{
|
|
PMSREGS sregs;
|
|
ulong linAddr;
|
|
ulong DSBaseAddr;
|
|
|
|
/* Get the base address for the default DS selector */
|
|
PM_segread(&sregs);
|
|
DSBaseAddr = DPMI_getSelectorBase(sregs.ds);
|
|
if ((base < 0x100000) && (DSBaseAddr == 0)) {
|
|
/* DS is zero based, so we can directly access the first 1Mb of
|
|
* system memory (like under DOS4GW).
|
|
*/
|
|
return (void*)base;
|
|
}
|
|
|
|
/* Map the memory to a linear address using DPMI function 0x800 */
|
|
if ((linAddr = DPMI_mapPhysicalToLinear(base,limit)) == 0) {
|
|
if (base >= 0x100000)
|
|
return NULL;
|
|
/* If the linear address mapping fails but we are trying to
|
|
* map an area in the first 1Mb of system memory, then we must
|
|
* be running under a Windows or OS/2 DOS box. Under these
|
|
* environments we can use the segment wrap around as a fallback
|
|
* measure, as this does work properly.
|
|
*/
|
|
linAddr = base;
|
|
}
|
|
|
|
/* Now expand the default DS selector to 4Gb so we can access it */
|
|
if (!DPMI_setSelectorLimit(sregs.ds,0xFFFFFFFFUL))
|
|
return NULL;
|
|
|
|
/* Finally enable caching for the page tables that we just mapped in,
|
|
* since DOS4GW and PMODE/W create the page table entries without
|
|
* caching enabled which hurts the performance of the linear framebuffer
|
|
* as it disables write combining on Pentium Pro and above processors.
|
|
*
|
|
* For those processors cache disabling is better handled through the
|
|
* MTRR registers anyway (we can write combine a region but disable
|
|
* caching) so that MMIO register regions do not screw up.
|
|
*/
|
|
if (isCached) {
|
|
if ((PDB = _PM_getPDB()) != 0 && DSBaseAddr == 0) {
|
|
int startPDB,endPDB,iPDB,startPage,endPage,start,end,iPage;
|
|
ulong pageTable,*pPageTable;
|
|
if (!pPDB) {
|
|
if (PDB >= 0x100000)
|
|
pPDB = (ulong*)DPMI_mapPhysicalToLinear(PDB,0xFFF);
|
|
else
|
|
pPDB = (ulong*)PDB;
|
|
}
|
|
if (pPDB) {
|
|
startPDB = (linAddr >> 22) & 0x3FF;
|
|
startPage = (linAddr >> 12) & 0x3FF;
|
|
endPDB = ((linAddr+limit) >> 22) & 0x3FF;
|
|
endPage = ((linAddr+limit) >> 12) & 0x3FF;
|
|
for (iPDB = startPDB; iPDB <= endPDB; iPDB++) {
|
|
pageTable = pPDB[iPDB] & ~0xFFF;
|
|
if (pageTable >= 0x100000)
|
|
pPageTable = (ulong*)DPMI_mapPhysicalToLinear(pageTable,0xFFF);
|
|
else
|
|
pPageTable = (ulong*)pageTable;
|
|
start = (iPDB == startPDB) ? startPage : 0;
|
|
end = (iPDB == endPDB) ? endPage : 0x3FF;
|
|
for (iPage = start; iPage <= end; iPage++)
|
|
pPageTable[iPage] &= ~0x18;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Now return the base address of the memory into the default DS */
|
|
return (void*)(linAddr - DSBaseAddr);
|
|
}
|
|
|
|
/* Some DOS extender implementations do not directly support calling a
|
|
* real mode procedure from protected mode. However we can simulate what
|
|
* we need temporarily hooking the INT 6Ah vector with a small real mode
|
|
* stub that will call our real mode code for us.
|
|
*/
|
|
|
|
static uchar int6AHandler[] = {
|
|
0x00,0x00,0x00,0x00, /* __PMODE_callReal variable */
|
|
0xFB, /* sti */
|
|
0x2E,0xFF,0x1E,0x00,0x00, /* call [cs:__PMODE_callReal] */
|
|
0xCF, /* iretf */
|
|
};
|
|
static uchar *crPtr = NULL; /* Pointer to of int 6A handler */
|
|
static uint crRSeg,crROff; /* Real mode seg:offset of handler */
|
|
|
|
void PMAPI PM_callRealMode(uint seg,uint off, RMREGS *in,
|
|
RMSREGS *sregs)
|
|
{
|
|
uchar *p;
|
|
uint oldSeg,oldOff;
|
|
|
|
if (!crPtr) {
|
|
/* Allocate and copy the memory block only once */
|
|
crPtr = PM_allocRealSeg(sizeof(int6AHandler), &crRSeg, &crROff);
|
|
memcpy(crPtr,int6AHandler,sizeof(int6AHandler));
|
|
}
|
|
PM_setWord(crPtr,off); /* Plug in address to call */
|
|
PM_setWord(crPtr+2,seg);
|
|
p = PM_mapRealPointer(0,0x6A * 4);
|
|
oldOff = PM_getWord(p); /* Save old handler address */
|
|
oldSeg = PM_getWord(p+2);
|
|
PM_setWord(p,crROff+4); /* Hook 6A handler */
|
|
PM_setWord(p+2,crRSeg);
|
|
PM_int86x(0x6A, in, in, sregs); /* Call real mode code */
|
|
PM_setWord(p,oldOff); /* Restore old handler */
|
|
PM_setWord(p+2,oldSeg);
|
|
}
|
|
|
|
void * PMAPI PM_getBIOSPointer(void)
|
|
{ return PM_mapPhysicalAddr(0x400,0xFFFF,true); }
|
|
|
|
void * PMAPI PM_getA0000Pointer(void)
|
|
{ return PM_mapPhysicalAddr(0xA0000,0xFFFF,true); }
|
|
|
|
void * PMAPI PM_mapPhysicalAddr(ulong base,ulong limit,ibool isCached)
|
|
{ return DPMI_mapPhysicalAddr(base,limit,isCached); }
|
|
|
|
void PMAPI PM_freePhysicalAddr(void *ptr,ulong limit)
|
|
{
|
|
/* Mapping cannot be free */
|
|
}
|
|
|
|
ulong PMAPI PM_getPhysicalAddr(void *p)
|
|
{
|
|
/* TODO: This function should find the physical address of a linear */
|
|
/* address. */
|
|
(void)p;
|
|
return 0xFFFFFFFFUL;
|
|
}
|
|
|
|
void * PMAPI PM_mapToProcess(void *base,ulong limit)
|
|
{
|
|
(void)limit;
|
|
return (void*)base;
|
|
}
|
|
|
|
void * PMAPI PM_mapRealPointer(uint r_seg,uint r_off)
|
|
{
|
|
static uchar *zeroPtr = NULL;
|
|
|
|
if (!zeroPtr)
|
|
zeroPtr = PM_mapPhysicalAddr(0,0xFFFFF,true);
|
|
return (void*)(zeroPtr + MK_PHYS(r_seg,r_off));
|
|
}
|
|
|
|
void * PMAPI PM_allocRealSeg(uint size,uint *r_seg,uint *r_off)
|
|
{
|
|
PMREGS r;
|
|
void *p;
|
|
|
|
r.x.ax = 0x100; /* DPMI allocate DOS memory */
|
|
r.x.bx = (size + 0xF) >> 4; /* number of paragraphs */
|
|
PM_int386(0x31, &r, &r);
|
|
if (r.x.cflag)
|
|
return NULL; /* DPMI call failed */
|
|
*r_seg = r.x.ax; /* Real mode segment */
|
|
*r_off = 0;
|
|
p = PM_mapRealPointer(*r_seg,*r_off);
|
|
_PM_addRealModeBlock(p,r.x.dx);
|
|
return p;
|
|
}
|
|
|
|
void PMAPI PM_freeRealSeg(void *mem)
|
|
{
|
|
PMREGS r;
|
|
|
|
r.x.ax = 0x101; /* DPMI free DOS memory */
|
|
r.x.dx = _PM_findRealModeBlock(mem);/* DX := selector from 0x100 */
|
|
PM_int386(0x31, &r, &r);
|
|
}
|
|
|
|
static DPMI_handler_t DPMI_int10 = NULL;
|
|
|
|
void PMAPI DPMI_setInt10Handler(DPMI_handler_t handler)
|
|
{
|
|
DPMI_int10 = handler;
|
|
}
|
|
|
|
void PMAPI DPMI_int86(int intno, DPMI_regs *regs)
|
|
{
|
|
PMREGS r;
|
|
PMSREGS sr;
|
|
|
|
if (intno == 0x10 && DPMI_int10) {
|
|
if (DPMI_int10(regs))
|
|
return;
|
|
}
|
|
PM_segread(&sr);
|
|
r.x.ax = 0x300; /* DPMI issue real interrupt */
|
|
r.h.bl = intno;
|
|
r.h.bh = 0;
|
|
r.x.cx = 0;
|
|
sr.es = sr.ds;
|
|
r.e.edi = (uint)regs;
|
|
PM_int386x(0x31, &r, &r, &sr); /* Issue the interrupt */
|
|
}
|
|
|
|
#define IN(reg) rmregs.reg = in->e.reg
|
|
#define OUT(reg) out->e.reg = rmregs.reg
|
|
|
|
int PMAPI PM_int86(int intno, RMREGS *in, RMREGS *out)
|
|
{
|
|
DPMI_regs rmregs;
|
|
|
|
memset(&rmregs, 0, sizeof(rmregs));
|
|
IN(eax); IN(ebx); IN(ecx); IN(edx); IN(esi); IN(edi);
|
|
|
|
/* These real mode ints may cause crashes. */
|
|
/*AM: DPMI_int86(intno,&rmregs); /###* DPMI issue real interrupt */
|
|
|
|
OUT(eax); OUT(ebx); OUT(ecx); OUT(edx); OUT(esi); OUT(edi);
|
|
out->x.cflag = rmregs.flags & 0x1;
|
|
return out->x.ax;
|
|
}
|
|
|
|
int PMAPI PM_int86x(int intno, RMREGS *in, RMREGS *out,
|
|
RMSREGS *sregs)
|
|
{
|
|
DPMI_regs rmregs;
|
|
|
|
memset(&rmregs, 0, sizeof(rmregs));
|
|
IN(eax); IN(ebx); IN(ecx); IN(edx); IN(esi); IN(edi);
|
|
rmregs.es = sregs->es;
|
|
rmregs.ds = sregs->ds;
|
|
|
|
/*AM: DPMI_int86(intno,&rmregs); /###* DPMI issue real interrupt */
|
|
|
|
OUT(eax); OUT(ebx); OUT(ecx); OUT(edx); OUT(esi); OUT(edi);
|
|
sregs->es = rmregs.es;
|
|
sregs->cs = rmregs.cs;
|
|
sregs->ss = rmregs.ss;
|
|
sregs->ds = rmregs.ds;
|
|
out->x.cflag = rmregs.flags & 0x1;
|
|
return out->x.ax;
|
|
}
|
|
|
|
#pragma pack(1)
|
|
|
|
typedef struct {
|
|
uint LargestBlockAvail;
|
|
uint MaxUnlockedPage;
|
|
uint LargestLockablePage;
|
|
uint LinAddrSpace;
|
|
uint NumFreePagesAvail;
|
|
uint NumPhysicalPagesFree;
|
|
uint TotalPhysicalPages;
|
|
uint FreeLinAddrSpace;
|
|
uint SizeOfPageFile;
|
|
uint res[3];
|
|
} MemInfo;
|
|
|
|
#pragma pack()
|
|
|
|
void PMAPI PM_availableMemory(ulong *physical,ulong *total)
|
|
{
|
|
PMREGS r;
|
|
PMSREGS sr;
|
|
MemInfo memInfo;
|
|
|
|
PM_segread(&sr);
|
|
r.x.ax = 0x500; /* DPMI get free memory info */
|
|
sr.es = sr.ds;
|
|
r.e.edi = (uint)&memInfo;
|
|
PM_int386x(0x31, &r, &r, &sr); /* Issue the interrupt */
|
|
*physical = memInfo.NumPhysicalPagesFree * 4096;
|
|
*total = memInfo.LargestBlockAvail;
|
|
if (*total < *physical)
|
|
*physical = *total;
|
|
}
|
|
|
|
/****************************************************************************
|
|
REMARKS:
|
|
Function to get the file attributes for a specific file.
|
|
****************************************************************************/
|
|
uint PMAPI PM_getFileAttr(
|
|
const char *filename)
|
|
{
|
|
/* TODO: Implement this! */
|
|
return 0;
|
|
}
|
|
|
|
/****************************************************************************
|
|
REMARKS:
|
|
Function to get the file time and date for a specific file.
|
|
****************************************************************************/
|
|
ibool PMAPI PM_getFileTime(
|
|
const char *filename,
|
|
ibool gmTime,
|
|
PM_time *time)
|
|
{
|
|
/* TODO: Implement this! */
|
|
return false;
|
|
}
|
|
|
|
/****************************************************************************
|
|
REMARKS:
|
|
Function to set the file time and date for a specific file.
|
|
****************************************************************************/
|
|
ibool PMAPI PM_setFileTime(
|
|
const char *filename,
|
|
ibool gmTime,
|
|
PM_time *time)
|
|
{
|
|
/* TODO: Implement this! */
|
|
return false;
|
|
}
|