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/*
MAPDEV.h - include file for VxD MAPDEV
Copyright (c) 1996 Vireo Software, Inc.
Modified for libdha by Nick Kurshev.
*/
#include <windows.h>
#include <ddk/ntddk.h>
#include "vidix/dhahelperwin/dhahelper.h"
/*
This is the request structure that applications use
to request services from the MAPDEV VxD.
*/
typedef struct MapDevRequest
{
DWORD mdr_ServiceID; /* supplied by caller */
LPVOID mdr_PhysicalAddress; /* supplied by caller */
DWORD mdr_SizeInBytes; /* supplied by caller */
LPVOID mdr_LinearAddress; /* returned by VxD */
WORD mdr_Selector; /* returned if 16-bit caller */
WORD mdr_Status; /* MDR_xxxx code below */
} MAPDEVREQUEST, *PMAPDEVREQUEST;
#define MDR_SERVICE_MAP CTL_CODE(FILE_DEVICE_UNKNOWN, 1, METHOD_NEITHER, FILE_ANY_ACCESS)
#define MDR_SERVICE_UNMAP CTL_CODE(FILE_DEVICE_UNKNOWN, 2, METHOD_NEITHER, FILE_ANY_ACCESS)
#define MDR_STATUS_SUCCESS 1
#define MDR_STATUS_ERROR 0
/*#include "winioctl.h"*/
#define FILE_DEVICE_UNKNOWN 0x00000022
#define METHOD_NEITHER 3
int IsWinNT(){
OSVERSIONINFO OSVersionInfo;
OSVersionInfo.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
GetVersionEx(&OSVersionInfo);
return OSVersionInfo.dwPlatformId == VER_PLATFORM_WIN32_NT;
}
static HANDLE hDriver = INVALID_HANDLE_VALUE;
/* Memory Map a piece of Real Memory */
void *map_phys_mem(unsigned long base, unsigned long size) {
if(!IsWinNT()){
HANDLE hDevice ;
PVOID inBuf[1] ; /* buffer for struct pointer to VxD */
DWORD cbBytesReturned ; /* count of bytes returned from VxD */
MAPDEVREQUEST req ; /* map device request structure */
const PCHAR VxDName = "\\\\.\\MAPDEV.VXD" ;
const PCHAR VxDNameAlreadyLoaded = "\\\\.\\MAPDEV" ;
hDevice = CreateFile(VxDName, 0,0,0,
CREATE_NEW, FILE_FLAG_DELETE_ON_CLOSE, 0) ;
if (hDevice == INVALID_HANDLE_VALUE)
hDevice = CreateFile(VxDNameAlreadyLoaded, 0,0,0,
CREATE_NEW, FILE_FLAG_DELETE_ON_CLOSE, 0) ;
if (hDevice == INVALID_HANDLE_VALUE) {
fprintf(stderr, "Cannot open driver, error=%08lx\n", GetLastError()) ;
exit(1) ; }
req.mdr_ServiceID = MDR_SERVICE_MAP ;
req.mdr_PhysicalAddress = (PVOID)base ;
req.mdr_SizeInBytes = size ;
inBuf[0] = &req ;
if ( ! DeviceIoControl(hDevice, MDR_SERVICE_MAP, inBuf, sizeof(PVOID),
NULL, 0, &cbBytesReturned, NULL) ) {
fprintf(stderr, "Failed to map device\n") ; exit(1) ; }
return (void*)req.mdr_LinearAddress ;
}
else{
dhahelper_t dhahelper_priv;
DWORD dwBytesReturned;
dhahelper_priv.size = size;
dhahelper_priv.base = base;
if(hDriver==INVALID_HANDLE_VALUE)hDriver = CreateFile("\\\\.\\DHAHELPER",GENERIC_READ | GENERIC_WRITE,0,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);
if (!DeviceIoControl(hDriver, IOCTL_DHAHELPER_MAPPHYSTOLIN, &dhahelper_priv,sizeof(dhahelper_t), &dhahelper_priv, sizeof(dhahelper_t),&dwBytesReturned, NULL)){
fprintf(stderr,"Unable to map the requested memory region.\n");
return NULL;
}
else return dhahelper_priv.ptr;
}
}
void unmap_phys_mem(void *ptr, unsigned long size) {
if(IsWinNT()){
dhahelper_t dhahelper_priv;
DWORD dwBytesReturned;
dhahelper_priv.ptr = ptr;
DeviceIoControl(hDriver, IOCTL_DHAHELPER_UNMAPPHYSADDR, &dhahelper_priv,sizeof(dhahelper_t), NULL, 0, &dwBytesReturned, NULL);
}
}
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