diff options
author | wdenk <wdenk> | 2002-11-19 11:04:11 +0000 |
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committer | wdenk <wdenk> | 2002-11-19 11:04:11 +0000 |
commit | c7de829c796978e519984df2f1c8cfcf921a39a4 (patch) | |
tree | 43e42aa9a09f5265783c1622a5cea080471ef50e /board/MAI/bios_emulator/scitech/src/pm/vxd/pm.c | |
parent | 2262cfeef91458b01a1bfe3812ccbbfdf8b82807 (diff) | |
download | u-boot-imx-c7de829c796978e519984df2f1c8cfcf921a39a4.zip u-boot-imx-c7de829c796978e519984df2f1c8cfcf921a39a4.tar.gz u-boot-imx-c7de829c796978e519984df2f1c8cfcf921a39a4.tar.bz2 |
* Patch by Thomas Frieden, 13 Nov 2002:
Add code for AmigaOne board
(preliminary merge to U-Boot, still WIP)
* Patch by Jon Diekema, 12 Nov 2002:
- Adding URL for IEEE OUI lookup
- Making the autoboot #defines dependent on CONFIG_AUTOBOOT_KEYED
being defined.
- In the CONFIG_EXTRA_ENV_SETTINGS #define, the root-on-initrd and
root-on-nfs macros are designed to switch how the default boot
method gets defined.
Diffstat (limited to 'board/MAI/bios_emulator/scitech/src/pm/vxd/pm.c')
-rw-r--r-- | board/MAI/bios_emulator/scitech/src/pm/vxd/pm.c | 1360 |
1 files changed, 1360 insertions, 0 deletions
diff --git a/board/MAI/bios_emulator/scitech/src/pm/vxd/pm.c b/board/MAI/bios_emulator/scitech/src/pm/vxd/pm.c new file mode 100644 index 0000000..8d00df9 --- /dev/null +++ b/board/MAI/bios_emulator/scitech/src/pm/vxd/pm.c @@ -0,0 +1,1360 @@ +/**************************************************************************** +* +* 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 Windows VxD +* +* Description: Implementation for the OS Portability Manager Library, which +* contains functions to implement OS specific services in a +* generic, cross platform API. Porting the OS Portability +* Manager library is the first step to porting any SciTech +* products to a new platform. +* +****************************************************************************/ + +#include "pmapi.h" +#include "drvlib/os/os.h" +#include "sdd/sddhelp.h" +#include "mtrr.h" + +/*--------------------------- Global variables ----------------------------*/ + +#define MAX_MEMORY_SHARED 100 +#define MAX_MEMORY_MAPPINGS 100 + +typedef struct { + void *linear; + ulong global; + ulong length; + int npages; + } memshared; + +typedef struct { + ulong physical; + ulong linear; + ulong length; + int npages; + ibool isCached; + } mmapping; + +static int numMappings = 0; +static memshared shared[MAX_MEMORY_MAPPINGS] = {0}; +static mmapping maps[MAX_MEMORY_MAPPINGS]; +extern ibool _PM_haveBIOS; +char _PM_cntPath[PM_MAX_PATH] = ""; +char _PM_nucleusPath[PM_MAX_PATH] = ""; +uchar *_PM_rmBufAddr = NULL; +ushort _VARAPI _PM_savedDS = 0; +static uchar _PM_oldCMOSRegA; +static uchar _PM_oldCMOSRegB; +PM_intHandler _PM_rtcHandler = NULL; +IRQHANDLE RTCIRQHandle = 0; +VPICD_HWInt_THUNK RTCInt_Thunk; + +static char *szWindowsKey = "Software\\Microsoft\\Windows\\CurrentVersion"; +static char *szSystemRoot = "SystemRoot"; +static char *szMachineNameKey = "System\\CurrentControlSet\\control\\ComputerName\\ComputerName"; +static char *szMachineName = "ComputerName"; +static void (PMAPIP fatalErrorCleanup)(void) = NULL; + +/*----------------------------- Implementation ----------------------------*/ + +/* Functions to read and write CMOS registers */ + +ulong PMAPI _PM_getPDB(void); +uchar PMAPI _PM_readCMOS(int index); +void PMAPI _PM_writeCMOS(int index,uchar value); + +/**************************************************************************** +REMARKS: +PM_malloc override function for Nucleus drivers loaded in VxD's. +****************************************************************************/ +void * VXD_malloc( + size_t size) +{ + return PM_mallocShared(size); +} + +/**************************************************************************** +REMARKS: +PM_calloc override function for Nucleus drivers loaded in VxD's. +****************************************************************************/ +void * VXD_calloc( + size_t nelem, + size_t size) +{ + void *p = PM_mallocShared(nelem * size); + if (p) + memset(p,0,nelem * size); + return p; +} + +/**************************************************************************** +REMARKS: +PM_realloc override function for Nucleus drivers loaded in VxD's. +****************************************************************************/ +void * VXD_realloc( + void *ptr, + size_t size) +{ + void *p = PM_mallocShared(size); + if (p) { + memcpy(p,ptr,size); + PM_freeShared(ptr); + } + return p; +} + +/**************************************************************************** +REMARKS: +PM_free override function for Nucleus drivers loaded in VxD's. +****************************************************************************/ +void VXD_free( + void *p) +{ + PM_freeShared(p); +} + +/**************************************************************************** +REMARKS: +Initialise the PM library. +****************************************************************************/ +void PMAPI PM_init(void) +{ + /* Override the default memory allocators for all Nucleus drivers + * loaded in SDDHELP/PMHELP. We do this so that we can ensure all memory + * dynamically allocated by Nucleus drivers and internal C runtime + * library functions are shared memory blocks that all processes + * connecting to SDDHELP can see. + */ + PM_useLocalMalloc(VXD_malloc,VXD_calloc,VXD_realloc,VXD_free); + + /* Initialiase the MTRR module */ + MTRR_init(); +} + +ibool PMAPI PM_haveBIOSAccess(void) +{ return _PM_haveBIOS; } + +long PMAPI PM_getOSType(void) +{ return _OS_WIN32VXD; } + +int PMAPI PM_getModeType(void) +{ return PM_386; } + +void PMAPI PM_backslash(char *s) +{ + uint pos = strlen(s); + if (s[pos-1] != '\\') { + s[pos] = '\\'; + s[pos+1] = '\0'; + } +} + +void PMAPI PM_setFatalErrorCleanup( + void (PMAPIP cleanup)(void)) +{ + fatalErrorCleanup = cleanup; +} + +void PMAPI PM_fatalError(const char *msg) +{ + if (fatalErrorCleanup) + fatalErrorCleanup(); + Fatal_Error_Handler(msg,0); +} + +/**************************************************************************** +PARAMETERS: +len - Place to store the length of the buffer +rseg - Place to store the real mode segment of the buffer +roff - Place to store the real mode offset of the buffer + +REMARKS: +This function returns the address and length of the global VESA transfer +buffer that is used for communicating with the VESA BIOS functions from +Win16 and Win32 programs under Windows. +****************************************************************************/ +void * PMAPI PM_getVESABuf( + uint *len, + uint *rseg, + uint *roff) +{ + /* If the VxD is dynamically loaded we will not have a real mode + * transfer buffer to return, so we fail the call. + */ + if (_PM_rmBufAddr) { + *len = VESA_BUF_SIZE; + *rseg = (ulong)(_PM_rmBufAddr) >> 4; + *roff = (ulong)(_PM_rmBufAddr) & 0xF; + return _PM_rmBufAddr; + } + return NULL; +} + +int PMAPI PM_int386( + int intno, + PMREGS *in, + PMREGS *out) +{ + /* Unused in VxDs */ + return 0; +} + +void PMAPI _PM_getRMvect( + int intno, + long *realisr) +{ + WORD seg; + DWORD off; + + Get_V86_Int_Vector(intno,&seg,&off); + *realisr = ((long)seg << 16) | (off & 0xFFFF); +} + +void PMAPI _PM_setRMvect( + int intno, + long realisr) +{ + Set_V86_Int_Vector(intno,realisr >> 16,realisr & 0xFFFF); +} + +char * PMAPI PM_getCurrentPath( + char *path, + int maxLen) +{ + strncpy(path,_PM_cntPath,maxLen); + path[maxLen-1] = 0; + return path; +} + +char PMAPI PM_getBootDrive(void) +{ return 'c'; } + +const char * PMAPI PM_getVBEAFPath(void) +{ return "c:\\"; } + +/**************************************************************************** +PARAMETERS: +szKey - Key to query (can contain version number formatting) +szValue - Value to get information for +value - Place to store the registry key data read +size - Size of the string buffer to read into + +RETURNS: +true if the key was found, false if not. +****************************************************************************/ +static ibool REG_queryString( + char *szKey, + char *szValue, + char *value, + ulong size) +{ + HKEY hKey; + ulong type; + ibool status = false; + + memset(value,0,sizeof(value)); + if (RegOpenKey(HKEY_LOCAL_MACHINE,szKey,&hKey) == ERROR_SUCCESS) { + if (RegQueryValueEx(hKey,(PCHAR)szValue,(ulong*)NULL,(ulong*)&type,value,(ulong*)&size) == ERROR_SUCCESS) + status = true; + RegCloseKey(hKey); + } + return status; +} + +const char * PMAPI PM_getNucleusPath(void) +{ + static char path[256]; + + if (strlen(_PM_nucleusPath) > 0) { + strcpy(path,_PM_nucleusPath); + PM_backslash(path); + return path; + } + if (!REG_queryString(szWindowsKey,szSystemRoot,path,sizeof(path))) + strcpy(path,"c:\\windows"); + PM_backslash(path); + strcat(path,"system\\nucleus"); + return path; +} + +const char * PMAPI PM_getNucleusConfigPath(void) +{ + static char path[256]; + strcpy(path,PM_getNucleusPath()); + PM_backslash(path); + strcat(path,"config"); + return path; +} + +const char * PMAPI PM_getUniqueID(void) +{ return PM_getMachineName(); } + +const char * PMAPI PM_getMachineName(void) +{ + static char name[256]; + if (REG_queryString(szMachineNameKey,szMachineName,name,sizeof(name))) + return name; + return "Unknown"; +} + +int PMAPI PM_kbhit(void) +{ return 1; } + +int PMAPI PM_getch(void) +{ return 0; } + +PM_HWND PMAPI PM_openConsole( + PM_HWND hwndUser, + int device, + int xRes, + int yRes, + int bpp, + ibool fullScreen) +{ + /* Unused in VxDs */ + return NULL; +} + +int PMAPI PM_getConsoleStateSize(void) +{ + /* Unused in VxDs */ + return 1; +} + +void PMAPI PM_saveConsoleState( + void *stateBuf, + PM_HWND hwndConsole) +{ + /* Unused in VxDs */ +} + +void PMAPI PM_setSuspendAppCallback( + int (_ASMAPIP saveState)( + int flags)) +{ + /* Unused in VxDs */ +} + +void PMAPI PM_restoreConsoleState( + const void *stateBuf, + PM_HWND hwndConsole) +{ + /* Unused in VxDs */ +} + +void PMAPI PM_closeConsole( + PM_HWND hwndConsole) +{ + /* Unused in VxDs */ +} + +void PM_setOSCursorLocation( + int x, + int y) +{ + uchar *_biosPtr = PM_getBIOSPointer(); + PM_setByte(_biosPtr+0x50,x); + PM_setByte(_biosPtr+0x51,y); +} + +void PM_setOSScreenWidth( + int width, + int height) +{ + uchar *_biosPtr = PM_getBIOSPointer(); + PM_setByte(_biosPtr+0x4A,width); + PM_setByte(_biosPtr+0x84,height-1); +} + +/**************************************************************************** +REMARKS: +Allocate a block of shared memory. For Win9x we allocate shared memory +as locked, global memory that is accessible from any memory context +(including interrupt time context), which allows us to load our important +data structure and code such that we can access it directly from a ring +0 interrupt context. +****************************************************************************/ +void * PMAPI PM_mallocShared( + long size) +{ + MEMHANDLE hMem; + DWORD pgNum,nPages = (size + 0xFFF) >> 12; + int i; + + /* First find a free slot in our shared memory table */ + for (i = 0; i < MAX_MEMORY_SHARED; i++) { + if (shared[i].linear == 0) + break; + } + if (i < MAX_MEMORY_SHARED) { + PageAllocate(nPages,PG_SYS,0,0,0,0,NULL,0,&hMem,&shared[i].linear); + shared[i].npages = nPages; + pgNum = (ulong)shared[i].linear >> 12; + shared[i].global = LinPageLock(pgNum,nPages,PAGEMAPGLOBAL); + return (void*)shared[i].global; + } + return NULL; +} + +/**************************************************************************** +REMARKS: +Free a block of shared memory +****************************************************************************/ +void PMAPI PM_freeShared(void *p) +{ + int i; + + /* Find a shared memory block in our table and free it */ + for (i = 0; i < MAX_MEMORY_SHARED; i++) { + if (shared[i].global == (ulong)p) { + LinPageUnLock(shared[i].global >> 12,shared[i].npages,PAGEMAPGLOBAL); + PageFree((ulong)shared[i].linear,0); + shared[i].linear = 0; + break; + } + } +} + +/**************************************************************************** +REMARKS: +Maps a shared memory block into process address space. Does nothing since +the memory blocks are already globally7 mapped into all processes. +****************************************************************************/ +void * PMAPI PM_mapToProcess( + void *base, + ulong limit) +{ + return (void*)base; +} + +ibool PMAPI PM_doBIOSPOST( + ushort axVal, + ulong BIOSPhysAddr, + void *mappedBIOS, + ulong BIOSLen) +{ + // TODO: Figure out how to do this + return false; +} + +void * PMAPI PM_getBIOSPointer(void) +{ return (void*)0x400; } + +void * PMAPI PM_getA0000Pointer(void) +{ return PM_mapPhysicalAddr(0xA0000,0xFFFF,true); } + +/**************************************************************************** +PARAMETERS: +base - Physical base address of the memory to maps in +limit - Limit of physical memory to region to maps in + +RETURNS: +Linear address of the newly mapped memory. + +REMARKS: +Maps a physical memory range to a linear memory range. +****************************************************************************/ +ulong _PM_mapPhysicalToLinear( + ulong base, + ulong limit, + int *npages) +{ + ulong linear,length = limit+1; + int i,ppage,flags; + + if (base < 0x100000) { + /* Windows 9x is zero based for the first meg of memory */ + return base; + } + ppage = base >> 12; + *npages = (length + (base & 0xFFF) + 4095) >> 12; + flags = PR_FIXED | PR_STATIC; + if (base == 0xA0000) { + /* We require the linear address to be aligned to a 64Kb boundary + * for mapping the banked framebuffer (so we can do efficient + * carry checking for bank changes in the assembler code). The only + * way to ensure this is to force the linear address to be aligned + * to a 4Mb boundary. + */ + flags |= PR_4MEG; + } + if ((linear = (ulong)PageReserve(PR_SYSTEM,*npages,flags)) == (ulong)-1) + return 0xFFFFFFFF; + if (!PageCommitPhys(linear >> 12,*npages,ppage,PC_INCR | PC_USER | PC_WRITEABLE)) + return 0xFFFFFFFF; + return linear + (base & 0xFFF); +} + +// Page table flags + +#define PAGE_FLAGS_PRESENT 0x00000001 +#define PAGE_FLAGS_WRITEABLE 0x00000002 +#define PAGE_FLAGS_USER 0x00000004 +#define PAGE_FLAGS_WRITE_THROUGH 0x00000008 +#define PAGE_FLAGS_CACHE_DISABLE 0x00000010 +#define PAGE_FLAGS_ACCESSED 0x00000020 +#define PAGE_FLAGS_DIRTY 0x00000040 +#define PAGE_FLAGS_4MB 0x00000080 + +/**************************************************************************** +PARAMETERS: +base - Physical base address of the memory to maps in +limit - Limit of physical memory to region to maps in +isCached - True if the memory should be cached, false if not + +RETURNS: +Linear address of the newly mapped memory. + +REMARKS: +This function maps physical memory to linear memory, which can then be used +to create a selector or used directly from 32-bit protected mode programs. +This is better than DPMI 0x800, since it allows you to maps physical +memory below 1Mb, which gets this memory out of the way of the Windows VDD's +sticky paws. + +NOTE: If the memory is not expected to be cached, this function will + directly re-program the PCD (Page Cache Disable) bit in the + page tables. There does not appear to be a mechanism in the VMM + to control this bit via the regular interface. +****************************************************************************/ +void * PMAPI PM_mapPhysicalAddr( + ulong base, + ulong limit, + ibool isCached) +{ + ulong linear,length = limit+1; + int i,npages; + ulong PDB,*pPDB; + + /* Search table of existing mappings to see if we have already mapped + * a region of memory that will serve this purpose. + */ + for (i = 0; i < numMappings; i++) { + if (maps[i].physical == base && maps[i].length == length && maps[i].isCached == isCached) + return (void*)maps[i].linear; + } + if (numMappings == MAX_MEMORY_MAPPINGS) + return NULL; + + /* We did not find any previously mapped memory region, so maps it in. + * Note that we do not use MapPhysToLinear, since this function appears + * to have problems mapping memory in the 1Mb physical address space. + * Hence we use PageReserve and PageCommitPhys. + */ + if ((linear = _PM_mapPhysicalToLinear(base,limit,&npages)) == 0xFFFFFFFF) + return NULL; + maps[numMappings].physical = base; + maps[numMappings].length = length; + maps[numMappings].linear = linear; + maps[numMappings].npages = npages; + maps[numMappings].isCached = isCached; + numMappings++; + + /* Finally disable caching where necessary */ + if (!isCached && (PDB = _PM_getPDB()) != 0) { + int startPDB,endPDB,iPDB,startPage,endPage,start,end,iPage; + ulong pageTable,*pPageTable; + pPDB = (ulong*)_PM_mapPhysicalToLinear(PDB,0xFFF,&npages); + if (pPDB) { + startPDB = (linear >> 22) & 0x3FF; + startPage = (linear >> 12) & 0x3FF; + endPDB = ((linear+limit) >> 22) & 0x3FF; + endPage = ((linear+limit) >> 12) & 0x3FF; + for (iPDB = startPDB; iPDB <= endPDB; iPDB++) { + // Set the bits in the page directory entry - required as per + // Pentium 4 manual. This also takes care of the 4MB page entries + pPDB[iPDB] = pPDB[iPDB] |= (PAGE_FLAGS_WRITE_THROUGH | PAGE_FLAGS_CACHE_DISABLE); + if (!(pPDB[iPDB] & PAGE_FLAGS_4MB)) { + // If we are dealing with 4KB pages then we need to iterate + // through each of the page table entries + pageTable = pPDB[iPDB] & ~0xFFF; + pPageTable = (ulong*)_PM_mapPhysicalToLinear(pageTable,0xFFF,&npages); + start = (iPDB == startPDB) ? startPage : 0; + end = (iPDB == endPDB) ? endPage : 0x3FF; + for (iPage = start; iPage <= end; iPage++) + pPageTable[iPage] |= (PAGE_FLAGS_WRITE_THROUGH | PAGE_FLAGS_CACHE_DISABLE); + PageFree((ulong)pPageTable,PR_STATIC); + } + } + PageFree((ulong)pPDB,PR_STATIC); + PM_flushTLB(); + } + } + return (void*)linear; +} + +void PMAPI PM_freePhysicalAddr( + void *ptr, + ulong limit) +{ + /* We never free the mappings */ +} + +void PMAPI PM_sleep(ulong milliseconds) +{ + /* We never sleep in a VxD */ +} + +int PMAPI PM_getCOMPort(int port) +{ + // TODO: Re-code this to determine real values using the Plug and Play + // manager for the OS. + switch (port) { + case 0: return 0x3F8; + case 1: return 0x2F8; + case 2: return 0x3E8; + case 3: return 0x2E8; + } + return 0; +} + +int PMAPI PM_getLPTPort(int port) +{ + // TODO: Re-code this to determine real values using the Plug and Play + // manager for the OS. + switch (port) { + case 0: return 0x3BC; + case 1: return 0x378; + case 2: return 0x278; + } + return 0; +} + +ulong PMAPI PM_getPhysicalAddr( + void *p) +{ + DWORD pte; + + // Touch the memory before calling CopyPageTable. For some reason + // we need to do this on Windows 9x, otherwise the memory may not + // be paged in correctly. Of course if the passed in pointer is + // invalid, this function will fault, but we shouldn't be passed bogus + // pointers anyway ;-) + pte = *((ulong*)p); + + // Return assembled address value only if VMM service succeeds + if (CopyPageTable(((DWORD)p) >> 12, 1, (PVOID*)&pte, 0)) + return (pte & ~0xFFF) | (((DWORD)p) & 0xFFF); + + // Return failure to the caller! + return 0xFFFFFFFFUL; +} + +ibool PMAPI PM_getPhysicalAddrRange( + void *p, + ulong length, + ulong *physAddress) +{ + int i; + ulong linear = (ulong)p & ~0xFFF; + + for (i = (length + 0xFFF) >> 12; i > 0; i--) { + if ((*physAddress++ = PM_getPhysicalAddr((void*)linear)) == 0xFFFFFFFF) + return false; + linear += 4096; + } + return true; +} + +void PMAPI _PM_freeMemoryMappings(void) +{ + int i; + for (i = 0; i < numMappings; i++) + PageFree(maps[i].linear,PR_STATIC); +} + +void * PMAPI PM_mapRealPointer( + uint r_seg, + uint r_off) +{ + return (void*)MK_PHYS(r_seg,r_off); +} + +void * PMAPI PM_allocRealSeg( + uint size, + uint *r_seg, + uint *r_off) +{ + return NULL; +} + +void PMAPI PM_freeRealSeg( + void *mem) +{ +} + +void PMAPI DPMI_int86( + int intno, + DPMI_regs *regs) +{ + /* Unsed in VxD's */ +} + +/**************************************************************************** +REMARKS: +Load the V86 registers in the client state, and save the original state +before loading the registers. +****************************************************************************/ +static void LoadV86Registers( + CLIENT_STRUCT *saveRegs, + RMREGS *in, + RMSREGS *sregs) +{ + CLIENT_STRUCT newRegs; + + Save_Client_State(saveRegs); + newRegs = *saveRegs; + newRegs.CRS.Client_EAX = in->e.eax; + newRegs.CRS.Client_EBX = in->e.ebx; + newRegs.CRS.Client_ECX = in->e.ecx; + newRegs.CRS.Client_EDX = in->e.edx; + newRegs.CRS.Client_ESI = in->e.esi; + newRegs.CRS.Client_EDI = in->e.edi; + newRegs.CRS.Client_ES = sregs->es; + newRegs.CRS.Client_DS = sregs->ds; + Restore_Client_State(&newRegs); +} + +/**************************************************************************** +REMARKS: +Read the V86 registers from the client state and restore the original state. +****************************************************************************/ +static void ReadV86Registers( + CLIENT_STRUCT *saveRegs, + RMREGS *out, + RMSREGS *sregs) +{ + CLIENT_STRUCT newRegs; + + Save_Client_State(&newRegs); + out->e.eax = newRegs.CRS.Client_EAX; + out->e.ebx = newRegs.CRS.Client_EBX; + out->e.ecx = newRegs.CRS.Client_ECX; + out->e.edx = newRegs.CRS.Client_EDX; + out->e.esi = newRegs.CRS.Client_ESI; + out->e.edi = newRegs.CRS.Client_EDI; + sregs->es = newRegs.CRS.Client_ES; + sregs->ds = newRegs.CRS.Client_DS; + Restore_Client_State(saveRegs); +} + +/**************************************************************************** +REMARKS: +Call a V86 real mode function with the specified register values +loaded before the call. The call returns with a far ret. +****************************************************************************/ +void PMAPI PM_callRealMode( + uint seg, + uint off, + RMREGS *regs, + RMSREGS *sregs) +{ + CLIENT_STRUCT saveRegs; + + /* Bail if we do not have BIOS access (ie: the VxD was dynamically + * loaded, and not statically loaded. + */ + if (!_PM_haveBIOS) + return; + + _TRACE("SDDHELP: Entering PM_callRealMode()\n"); + Begin_Nest_V86_Exec(); + LoadV86Registers(&saveRegs,regs,sregs); + Simulate_Far_Call(seg, off); + Resume_Exec(); + ReadV86Registers(&saveRegs,regs,sregs); + End_Nest_Exec(); + _TRACE("SDDHELP: Exiting PM_callRealMode()\n"); +} + +/**************************************************************************** +REMARKS: +Issue a V86 real mode interrupt with the specified register values +loaded before the interrupt. +****************************************************************************/ +int PMAPI PM_int86( + int intno, + RMREGS *in, + RMREGS *out) +{ + RMSREGS sregs = {0}; + CLIENT_STRUCT saveRegs; + ushort oldDisable; + + /* Bail if we do not have BIOS access (ie: the VxD was dynamically + * loaded, and not statically loaded. + */ + if (!_PM_haveBIOS) { + *out = *in; + return out->x.ax; + } + + /* Disable pass-up to our VxD handler so we directly call BIOS */ + _TRACE("SDDHELP: Entering PM_int86()\n"); + if (disableTSRFlag) { + oldDisable = *disableTSRFlag; + *disableTSRFlag = 0; + } + Begin_Nest_V86_Exec(); + LoadV86Registers(&saveRegs,in,&sregs); + Exec_Int(intno); + ReadV86Registers(&saveRegs,out,&sregs); + End_Nest_Exec(); + + /* Re-enable pass-up to our VxD handler if previously enabled */ + if (disableTSRFlag) + *disableTSRFlag = oldDisable; + + _TRACE("SDDHELP: Exiting PM_int86()\n"); + return out->x.ax; +} + +/**************************************************************************** +REMARKS: +Issue a V86 real mode interrupt with the specified register values +loaded before the interrupt. +****************************************************************************/ +int PMAPI PM_int86x( + int intno, + RMREGS *in, + RMREGS *out, + RMSREGS *sregs) +{ + CLIENT_STRUCT saveRegs; + ushort oldDisable; + + /* Bail if we do not have BIOS access (ie: the VxD was dynamically + * loaded, and not statically loaded. + */ + if (!_PM_haveBIOS) { + *out = *in; + return out->x.ax; + } + + /* Disable pass-up to our VxD handler so we directly call BIOS */ + _TRACE("SDDHELP: Entering PM_int86x()\n"); + if (disableTSRFlag) { + oldDisable = *disableTSRFlag; + *disableTSRFlag = 0; + } + Begin_Nest_V86_Exec(); + LoadV86Registers(&saveRegs,in,sregs); + Exec_Int(intno); + ReadV86Registers(&saveRegs,out,sregs); + End_Nest_Exec(); + + /* Re-enable pass-up to our VxD handler if previously enabled */ + if (disableTSRFlag) + *disableTSRFlag = oldDisable; + + _TRACE("SDDHELP: Exiting PM_int86x()\n"); + return out->x.ax; +} + +/**************************************************************************** +REMARKS: +Returns available memory. Not possible under Windows. +****************************************************************************/ +void PMAPI PM_availableMemory( + ulong *physical, + ulong *total) +{ + *physical = *total = 0; +} + +/**************************************************************************** +REMARKS: +Allocates a block of locked physical memory. +****************************************************************************/ +void * PMAPI PM_allocLockedMem( + uint size, + ulong *physAddr, + ibool contiguous, + ibool below16M) +{ + MEMHANDLE hMem; + DWORD nPages = (size + 0xFFF) >> 12; + DWORD flags = PAGEFIXED | PAGEUSEALIGN | (contiguous ? PAGECONTIG : 0); + DWORD maxPhys = below16M ? 0x00FFFFFF : 0xFFFFFFFF; + void *p; + + // TODO: This may need to be modified if the memory needs to be globally + // accessible. Check how we implemented PM_mallocShared() as we + // may need to do something similar in here. + PageAllocate(nPages,PG_SYS,0,0,0,maxPhys,physAddr,flags,&hMem,&p); + + // TODO: We may need to modify the memory blocks to disable caching via + // the page tables (PCD|PWT) since DMA memory blocks *cannot* be + // cached! + return p; +} + +/**************************************************************************** +REMARKS: +Frees a block of locked physical memory. +****************************************************************************/ +void PMAPI PM_freeLockedMem( + void *p, + uint size, + ibool contiguous) +{ + if (p) + PageFree((ulong)p,0); +} + +/**************************************************************************** +REMARKS: +Allocates a page aligned and page sized block of memory +****************************************************************************/ +void * PMAPI PM_allocPage( + ibool locked) +{ + MEMHANDLE hMem; + void *p; + + // TODO: This will need to be modified if the memory needs to be globally + // accessible. Check how we implemented PM_mallocShared() as we + // may need to do something similar in here. + PageAllocate(1,PG_SYS,0,0,0,0,0,PAGEFIXED,&hMem,&p); + return p; +} + +/**************************************************************************** +REMARKS: +Free a page aligned and page sized block of memory +****************************************************************************/ +void PMAPI PM_freePage( + void *p) +{ + if (p) + PageFree((ulong)p,0); +} + +/**************************************************************************** +REMARKS: +Lock linear memory so it won't be paged. +****************************************************************************/ +int PMAPI PM_lockDataPages( + void *p, + uint len, + PM_lockHandle *lh) +{ + DWORD pgNum = (ulong)p >> 12; + DWORD nPages = (len + (ulong)p - (pgNum << 12) + 0xFFF) >> 12; + return LinPageLock(pgNum,nPages,0); +} + +/**************************************************************************** +REMARKS: +Unlock linear memory so it won't be paged. +****************************************************************************/ +int PMAPI PM_unlockDataPages( + void *p, + uint len, + PM_lockHandle *lh) +{ + DWORD pgNum = (ulong)p >> 12; + DWORD nPages = (len + (ulong)p - (pgNum << 12) + 0xFFF) >> 12; + return LinPageUnLock(pgNum,nPages,0); +} + +/**************************************************************************** +REMARKS: +Lock linear memory so it won't be paged. +****************************************************************************/ +int PMAPI PM_lockCodePages( + void (*p)(), + uint len, + PM_lockHandle *lh) +{ + return PM_lockDataPages((void*)p,len,lh); +} + +/**************************************************************************** +REMARKS: +Unlock linear memory so it won't be paged. +****************************************************************************/ +int PMAPI PM_unlockCodePages( + void (*p)(), + uint len, + PM_lockHandle *lh) +{ + return PM_unlockDataPages((void*)p,len,lh); +} + +/**************************************************************************** +REMARKS: +Set the real time clock frequency (for stereo modes). +****************************************************************************/ +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); + } +} + +/**************************************************************************** +REMARKS: +Real time clock interrupt handler, which calls the user registered C code. +****************************************************************************/ +static BOOL __stdcall RTCInt_Handler( + VMHANDLE hVM, + IRQHANDLE hIRQ) +{ + static char inside = 0; + + /* Clear priority interrupt controller and re-enable interrupts so we + * dont lock things up for long. + */ + VPICD_Phys_EOI(hIRQ); + + /* Clear real-time clock timeout */ + _PM_readCMOS(0x0C); + + /* Now call the C based interrupt handler (but check for mutual + * exclusion since we may still be servicing an old interrupt when a + * new one comes along; if that happens we ignore the old one). + */ + if (!inside) { + inside = 1; + enable(); + _PM_rtcHandler(); + inside = 0; + } + return TRUE; +} + +/**************************************************************************** +REMARKS: +Set the real time clock handler (used for software stereo modes). +****************************************************************************/ +ibool PMAPI PM_setRealTimeClockHandler( + PM_intHandler ih, + int frequency) +{ + struct VPICD_IRQ_Descriptor IRQdesc; + + /* 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 */ + CHECK(ih != NULL); + _PM_rtcHandler = ih; + IRQdesc.VID_IRQ_Number = 0x8; + IRQdesc.VID_Options = 0; + IRQdesc.VID_Hw_Int_Proc = (DWORD)VPICD_Thunk_HWInt(RTCInt_Handler, &RTCInt_Thunk); + IRQdesc.VID_EOI_Proc = 0; + IRQdesc.VID_Virt_Int_Proc = 0; + IRQdesc.VID_Mask_Change_Proc= 0; + IRQdesc.VID_IRET_Proc = 0; + IRQdesc.VID_IRET_Time_Out = 500; + if ((RTCIRQHandle = VPICD_Virtualize_IRQ(&IRQdesc)) == 0) + return false; + + /* Program the real time clock default frequency */ + PM_setRealTimeClockFrequency(frequency); + + /* Unmask IRQ8 in the PIC */ + VPICD_Physically_Unmask(RTCIRQHandle); + return true; +} + +/**************************************************************************** +REMARKS: +Restore the original real time clock handler. +****************************************************************************/ +void PMAPI PM_restoreRealTimeClockHandler(void) +{ + if (RTCIRQHandle) { + /* Restore CMOS registers and mask RTC clock */ + _PM_writeCMOS(0x0A,_PM_oldCMOSRegA); + _PM_writeCMOS(0x0B,_PM_oldCMOSRegB); + + /* Restore the interrupt vector */ + VPICD_Set_Auto_Masking(RTCIRQHandle); + VPICD_Force_Default_Behavior(RTCIRQHandle); + RTCIRQHandle = 0; + } +} + +/**************************************************************************** +REMARKS: +OS specific shared libraries not supported inside a VxD +****************************************************************************/ +PM_MODULE PMAPI PM_loadLibrary( + const char *szDLLName) +{ + (void)szDLLName; + return NULL; +} + +/**************************************************************************** +REMARKS: +OS specific shared libraries not supported inside a VxD +****************************************************************************/ +void * PMAPI PM_getProcAddress( + PM_MODULE hModule, + const char *szProcName) +{ + (void)hModule; + (void)szProcName; + return NULL; +} + +/**************************************************************************** +REMARKS: +OS specific shared libraries not supported inside a VxD +****************************************************************************/ +void PMAPI PM_freeLibrary( + PM_MODULE hModule) +{ + (void)hModule; +} + +/**************************************************************************** +REMARKS: +Function to find the first file matching a search criteria in a directory. +****************************************************************************/ +void *PMAPI PM_findFirstFile( + const char *filename, + PM_findData *findData) +{ + // TODO: This function should start a directory enumeration search + // given the filename (with wildcards). The data should be + // converted and returned in the findData standard form. + (void)filename; + (void)findData; + 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) +{ + // TODO: This function should find the next file in directory enumeration + // search given the search criteria defined in the call to + // PM_findFirstFile. The data should be converted and returned + // in the findData standard form. + (void)handle; + (void)findData; + return false; +} + +/**************************************************************************** +REMARKS: +Function to close the find process +****************************************************************************/ +void PMAPI PM_findClose( + void *handle) +{ + // TODO: This function should close the find process. This may do + // nothing for some OS'es. + (void)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) +{ + // Not supported in a VxD + (void)drive; + return false; +} + +/**************************************************************************** +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) +{ + // Not supported in a VxD + (void)drive; + (void)dir; + (void)len; +} + +/**************************************************************************** +PARAMETERS: +base - The starting physical base address of the region +size - The size in bytes of the region +type - Type to place into the MTRR register + +RETURNS: +Error code describing the result. + +REMARKS: +Function to enable write combining for the specified region of memory. +****************************************************************************/ +int PMAPI PM_enableWriteCombine( + ulong base, + ulong size, + uint type) +{ + return MTRR_enableWriteCombine(base,size,type); +} + +/**************************************************************************** +REMARKS: +Function to change the file attributes for a specific file. +****************************************************************************/ +void PMAPI PM_setFileAttr( + const char *filename, + uint attrib) +{ + // TODO: Implement this + (void)filename; + (void)attrib; + PM_fatalError("PM_setFileAttr not implemented yet!"); +} + +/**************************************************************************** +REMARKS: +Function to get the file attributes for a specific file. +****************************************************************************/ +uint PMAPI PM_getFileAttr( + const char *filename) +{ + // TODO: Implement this + (void)filename; + PM_fatalError("PM_getFileAttr not implemented yet!"); + return 0; +} + +/**************************************************************************** +REMARKS: +Function to create a directory. +****************************************************************************/ +ibool PMAPI PM_mkdir( + const char *filename) +{ + // TODO: Implement this + (void)filename; + PM_fatalError("PM_mkdir not implemented yet!"); + return false; +} + +/**************************************************************************** +REMARKS: +Function to remove a directory. +****************************************************************************/ +ibool PMAPI PM_rmdir( + const char *filename) +{ + // TODO: Implement this + (void)filename; + PM_fatalError("PM_rmdir not implemented yet!"); + return false; +} + +/**************************************************************************** +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! + (void)filename; + (void)gmTime; + (void)time; + PM_fatalError("PM_getFileTime not implemented yet!"); + 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! + (void)filename; + (void)gmTime; + (void)time; + PM_fatalError("PM_setFileTime not implemented yet!"); + return false; +} + |