2 MAPDEV.h - include file for VxD MAPDEV
3 Copyright (c) 1996 Vireo Software, Inc.
4 Modified for libdha by Nick Kurshev.
9 #include "vidix/dhahelperwin/dhahelper.h"
12 This is the request structure that applications use
13 to request services from the MAPDEV VxD.
16 typedef struct MapDevRequest
18 DWORD mdr_ServiceID
; /* supplied by caller */
19 LPVOID mdr_PhysicalAddress
; /* supplied by caller */
20 DWORD mdr_SizeInBytes
; /* supplied by caller */
21 LPVOID mdr_LinearAddress
; /* returned by VxD */
22 WORD mdr_Selector
; /* returned if 16-bit caller */
23 WORD mdr_Status
; /* MDR_xxxx code below */
24 } MAPDEVREQUEST
, *PMAPDEVREQUEST
;
26 #define MDR_SERVICE_MAP CTL_CODE(FILE_DEVICE_UNKNOWN, 1, METHOD_NEITHER, FILE_ANY_ACCESS)
27 #define MDR_SERVICE_UNMAP CTL_CODE(FILE_DEVICE_UNKNOWN, 2, METHOD_NEITHER, FILE_ANY_ACCESS)
29 #define MDR_STATUS_SUCCESS 1
30 #define MDR_STATUS_ERROR 0
31 /*#include "winioctl.h"*/
32 #define FILE_DEVICE_UNKNOWN 0x00000022
33 #define METHOD_NEITHER 3
37 OSVERSIONINFO OSVersionInfo
;
38 OSVersionInfo
.dwOSVersionInfoSize
= sizeof(OSVERSIONINFO
);
39 GetVersionEx(&OSVersionInfo
);
40 return OSVersionInfo
.dwPlatformId
== VER_PLATFORM_WIN32_NT
;
43 static HANDLE hDriver
= INVALID_HANDLE_VALUE
;
46 /* Memory Map a piece of Real Memory */
47 void *map_phys_mem(unsigned long base
, unsigned long size
) {
50 PVOID inBuf
[1] ; /* buffer for struct pointer to VxD */
51 DWORD cbBytesReturned
; /* count of bytes returned from VxD */
52 MAPDEVREQUEST req
; /* map device request structure */
53 const PCHAR VxDName
= "\\\\.\\MAPDEV.VXD" ;
54 const PCHAR VxDNameAlreadyLoaded
= "\\\\.\\MAPDEV" ;
56 hDevice
= CreateFile(VxDName
, 0,0,0,
57 CREATE_NEW
, FILE_FLAG_DELETE_ON_CLOSE
, 0) ;
58 if (hDevice
== INVALID_HANDLE_VALUE
)
59 hDevice
= CreateFile(VxDNameAlreadyLoaded
, 0,0,0,
60 CREATE_NEW
, FILE_FLAG_DELETE_ON_CLOSE
, 0) ;
61 if (hDevice
== INVALID_HANDLE_VALUE
) {
62 fprintf(stderr
, "Cannot open driver, error=%08lx\n", GetLastError()) ;
65 req
.mdr_ServiceID
= MDR_SERVICE_MAP
;
66 req
.mdr_PhysicalAddress
= (PVOID
)base
;
67 req
.mdr_SizeInBytes
= size
;
70 if ( ! DeviceIoControl(hDevice
, MDR_SERVICE_MAP
, inBuf
, sizeof(PVOID
),
71 NULL
, 0, &cbBytesReturned
, NULL
) ) {
72 fprintf(stderr
, "Failed to map device\n") ; exit(1) ; }
74 return (void*)req
.mdr_LinearAddress
;
77 dhahelper_t dhahelper_priv
;
78 DWORD dwBytesReturned
;
79 dhahelper_priv
.size
= size
;
80 dhahelper_priv
.base
= base
;
81 if(hDriver
==INVALID_HANDLE_VALUE
)hDriver
= CreateFile("\\\\.\\DHAHELPER",GENERIC_READ
| GENERIC_WRITE
,0,NULL
,OPEN_EXISTING
,FILE_ATTRIBUTE_NORMAL
,NULL
);
82 if (!DeviceIoControl(hDriver
, IOCTL_DHAHELPER_MAPPHYSTOLIN
, &dhahelper_priv
,sizeof(dhahelper_t
), &dhahelper_priv
, sizeof(dhahelper_t
),&dwBytesReturned
, NULL
)){
83 fprintf(stderr
,"Unable to map the requested memory region.\n");
86 else return dhahelper_priv
.ptr
;
90 void unmap_phys_mem(void *ptr
, unsigned long size
) {
92 dhahelper_t dhahelper_priv
;
93 DWORD dwBytesReturned
;
94 dhahelper_priv
.ptr
= ptr
;
95 DeviceIoControl(hDriver
, IOCTL_DHAHELPER_UNMAPPHYSADDR
, &dhahelper_priv
,sizeof(dhahelper_t
), NULL
, 0, &dwBytesReturned
, NULL
);