mirror of
https://github.com/mpv-player/mpv
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71 lines
2.4 KiB
C
71 lines
2.4 KiB
C
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/*
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MAPDEV.h - include file for VxD MAPDEV
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Copyright (c) 1996 Vireo Software, Inc.
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Modified for libdha by Nick Kurshev.
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*/
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#include <windows.h>
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/*
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This is the request structure that applications use
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to request services from the MAPDEV VxD.
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*/
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typedef struct _MapDevRequest
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{
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DWORD mdr_ServiceID; /* supplied by caller */
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LPVOID mdr_PhysicalAddress; /* supplied by caller */
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DWORD mdr_SizeInBytes; /* supplied by caller */
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LPVOID mdr_LinearAddress; /* returned by VxD */
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WORD mdr_Selector; /* returned if 16-bit caller */
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WORD mdr_Status; /* MDR_xxxx code below */
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} MAPDEVREQUEST, *PMAPDEVREQUEST;
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#define MDR_SERVICE_MAP CTL_CODE(FILE_DEVICE_UNKNOWN, 1, METHOD_NEITHER, FILE_ANY_ACCESS)
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#define MDR_SERVICE_UNMAP CTL_CODE(FILE_DEVICE_UNKNOWN, 2, METHOD_NEITHER, FILE_ANY_ACCESS)
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#define MDR_STATUS_SUCCESS 1
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#define MDR_STATUS_ERROR 0
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/*#include "winioctl.h"*/
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#define FILE_DEVICE_UNKNOWN 0x00000022
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#define METHOD_NEITHER 3
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#define FILE_ANY_ACCESS 0
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#define CTL_CODE( DeviceType, Function, Method, Access ) ( \
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((DeviceType)<<16) | ((Access)<<14) | ((Function)<<2) | (Method) )
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/* Memory Map a piece of Real Memory */
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void *map_phys_mem(unsigned base, unsigned size) {
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HANDLE hDevice ;
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PVOID inBuf[1] ; /* buffer for struct pointer to VxD */
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DWORD RetInfo[2] ; /* buffer to receive data from VxD */
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DWORD cbBytesReturned ; /* count of bytes returned from VxD */
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MAPDEVREQUEST req ; /* map device request structure */
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DWORD *pNicstar, Status, Time ; int i ; char *endptr ;
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const PCHAR VxDName = "\\\\.\\MAPDEV.VXD" ;
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const PCHAR VxDNameAlreadyLoaded = "\\\\.\\MAPDEV" ;
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hDevice = CreateFile(VxDName, 0,0,0,
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CREATE_NEW, FILE_FLAG_DELETE_ON_CLOSE, 0) ;
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if (hDevice == INVALID_HANDLE_VALUE)
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hDevice = CreateFile(VxDNameAlreadyLoaded, 0,0,0,
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CREATE_NEW, FILE_FLAG_DELETE_ON_CLOSE, 0) ;
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if (hDevice == INVALID_HANDLE_VALUE) {
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fprintf(stderr, "Cannot open driver, error=%08lx\n", GetLastError()) ;
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exit(1) ; }
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req.mdr_ServiceID = MDR_SERVICE_MAP ;
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req.mdr_PhysicalAddress = (PVOID)base ;
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req.mdr_SizeInBytes = size ;
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inBuf[0] = &req ;
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if ( ! DeviceIoControl(hDevice, MDR_SERVICE_MAP, inBuf, sizeof(PVOID),
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NULL, 0, &cbBytesReturned, NULL) ) {
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fprintf(stderr, "Failed to map device\n") ; exit(1) ; }
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return (void*)req.mdr_LinearAddress ;
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}
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void unmap_phys_mem(void *ptr, unsigned size) { }
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