1 files changed, 102 insertions, 0 deletions
diff --git a/vidix/sysdep/libdha_win32.c b/vidix/sysdep/libdha_win32.c
new file mode 100644
index 0000000000..0a151b0637
--- /dev/null
+++ b/vidix/sysdep/libdha_win32.c
@@ -0,0 +1,102 @@
+/*
+  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 "../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
+#define FILE_ANY_ACCESS                 0
+#define CTL_CODE( DeviceType, Function, Method, Access ) ( \
+    ((DeviceType)<<16) | ((Access)<<14) | ((Function)<<2) | (Method) )
+
+    
+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 RetInfo[2] ;		/* buffer to receive data from VxD */
+  DWORD cbBytesReturned ;	/* count of bytes returned from VxD */
+  MAPDEVREQUEST req ;		/* map device request structure */
+  DWORD *pNicstar, Status, Time ; int i ; char *endptr ;
+  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);
+  }
+}