merged libdha and libvidix, moved all files from libdha to vidix directory

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@22918 b3059339-0415-0410-9bf9-f77b7e298cf2

57 files changed, 17393 insertions, 28 deletions

diff --git a/vidix/AsmMacros.h b/vidix/AsmMacros.h
new file mode 100644
index 0000000000..5e4e1addc4
--- /dev/null
+++ b/vidix/AsmMacros.h
@@ -0,0 +1,117 @@
+/* $XConsortium: AsmMacros.h /main/13 1996/10/25 11:33:12 kaleb $ */
+/*
+ * (c) Copyright 1993,1994 by David Wexelblat <dwex@xfree86.org>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a 
+ * copy of this software and associated documentation files (the "Software"), 
+ * to deal in the Software without restriction, including without limitation 
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense, 
+ * and/or sell copies of the Software, and to permit persons to whom the 
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL 
+ * DAVID WEXELBLAT BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF 
+ * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 
+ * SOFTWARE.
+ * 
+ * Except as contained in this notice, the name of David Wexelblat shall not be
+ * used in advertising or otherwise to promote the sale, use or other dealings
+ * in this Software without prior written authorization from David Wexelblat.
+ *
+ */
+/*
+ * Copyright 1997
+ * Digital Equipment Corporation. All rights reserved.
+ * This software is furnished under license and may be used and copied only in 
+ * accordance with the following terms and conditions.  Subject to these 
+ * conditions, you may download, copy, install, use, modify and distribute 
+ * this software in source and/or binary form. No title or ownership is 
+ * transferred hereby.
+ *
+ * 1) Any source code used, modified or distributed must reproduce and retain 
+ *    this copyright notice and list of conditions as they appear in the source
+ *    file.
+ *
+ * 2) No right is granted to use any trade name, trademark, or logo of Digital 
+ *    Equipment Corporation. Neither the "Digital Equipment Corporation" name 
+ *    nor any trademark or logo of Digital Equipment Corporation may be used 
+ *    to endorse or promote products derived from this software without the 
+ *    prior written permission of Digital Equipment Corporation.
+ *
+ * 3) This software is provided "AS-IS" and any express or implied warranties, 
+ *    including but not limited to, any implied warranties of merchantability, 
+ *    fitness for a particular purpose, or non-infringement are disclaimed. In 
+ *    no event shall DIGITAL be liable for any damages whatsoever, and in 
+ *    particular, DIGITAL shall not be liable for special, indirect, 
+ *    consequential, or incidental damages or damages for 
+ *    lost profits, loss of revenue or loss of use, whether such damages arise 
+ *    in contract, 
+ *    negligence, tort, under statute, in equity, at law or otherwise, even if 
+ *    advised of the possibility of such damage. 
+ *
+ */
+
+/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/chips/util/AsmMacros.h,v 1.1 2001/11/16 21:13:34 tsi Exp $ */
+
+/*
+ *   Modified for readability by Nick Kurshev
+*/
+
+#if defined(__GNUC__)
+#if defined(__alpha__)
+#include "sysdep/AsmMacros_alpha.h"
+#elif defined(__ia64__)
+#include "sysdep/AsmMacros_ia64.h"
+#elif defined(__sparc__)
+#include "sysdep/AsmMacros_sparc.h"
+#elif defined( __arm32__ )
+#include "sysdep/AsmMacros_arm32.h"
+#elif defined(__powerpc__)
+#include "sysdep/AsmMacros_powerpc.h"
+#else
+#include "sysdep/AsmMacros_x86.h"
+#endif
+
+#else /* __GNUC__ */
+
+#if defined(_MINIX) && defined(_ACK)
+
+/* inb, outb, inw and outw are defined in the library */
+/* ... but I've no idea if the same is true for inl & outl */
+
+u8_t inb(U16_t);
+void outb(U16_t, U8_t);
+u16_t inw(U16_t);
+void outw(U16_t, U16_t);
+u32_t inl(U16_t);
+void outl(U16_t, U32_t);
+
+#else /* not _MINIX and _ACK */
+
+# if defined(__STDC__) && (__STDC__ == 1)
+#  ifndef NCR
+#  define asm __asm
+#  endif
+# endif
+# ifdef SVR4
+#  include <sys/types.h>
+#  ifndef __USLC__
+#   define __USLC__
+#  endif
+# endif
+#ifndef SCO325
+# include <sys/inline.h>
+#else
+# include "../common/scoasm.h"
+#endif
+#define intr_disable() asm("cli")
+#define intr_enable()  asm("sti")
+
+#endif /* _MINIX and _ACK */
+#endif /* __GNUC__ */
diff --git a/vidix/Makefile b/vidix/Makefile
index b05b3b4fe2..a97666fe26 100644
--- a/vidix/Makefile
+++ b/vidix/Makefile
@@ -3,11 +3,25 @@ include ../config.mak
 LIBNAME_MPLAYER = libvidix.a
 
 SRCS_MPLAYER    = vidixlib.c \
+		  libdha.c \
+		  mtrr.c \
+		  pci.c \
+		  pci_names.c \
+		  pci_dev_ids.c \
                   $(wildcard *.c)
 
 OBJS_MPLAYER    = mga_crtc2_vid.o \
                   rage128_vid.o \
 
+# If you want libdha to use svgalib_helper for hardware access,
+# uncomment this statement, and change the -I to the correct directory
+# that includes svgalib_helper.o:
+#CFLAGS += -DDEV_SVGA=\"/dev/svga\" -DCONFIG_SVGAHELPER -Isvgalib_helper/
+
+libs: pci_names.c
+
+dep depend:: pci_names.c
+
 include ../mpcommon.mak
 
 mga_crtc2_vid.o: mga_vid.c
@@ -15,3 +29,9 @@ mga_crtc2_vid.o: mga_vid.c
 
 rage128_vid.o: radeon_vid.c
 	$(CC) -c $(CFLAGS) -DRAGE128 -o $@ $<
+
+pci_names.c pci_dev_ids.c: pci.db
+	LC_ALL=C $(AWK) -f pci_db2c.awk $<
+
+clean::
+	rm -f pci_*.c pci_*.h
diff --git a/vidix/bin/README b/vidix/bin/README
new file mode 100644
index 0000000000..fe4bfa6f34
--- /dev/null
+++ b/vidix/bin/README
@@ -0,0 +1,6 @@
+mapdev.vxd
+~~~~~~~~~~
+mapdev.vxd - provides direct hardware access under Win9x.
+install: Just copy it into %WINDOWS%\system folder and reboot.
+note: This driver won't work under NT-based systems
+(like WinNT, Win2000 and even WinME and WinXP due importing NT things).
diff --git a/vidix/bin/mapdev.copyright b/vidix/bin/mapdev.copyright
new file mode 100644
index 0000000000..b22433d291
--- /dev/null
+++ b/vidix/bin/mapdev.copyright
@@ -0,0 +1,70 @@
+From khazzah@melita.com  Mon Jun 23 21:48:19 1997
+Return-Path: <khazzah@melita.com>
+Received: from melita.melita.com by max4.rrze.uni-erlangen.de; Mon, 23 Jun 1997 21:48:16 +0200
+Received: from mailgate.melita.com ([192.68.22.8]) by melita.melita.com (8.6.12/8.6.9) with SMTP id QAA29292 for <Stefan.Dirsch@stud.uni-erlangen.de>; Mon, 23 Jun 1997 16:17:55 -0400
+Received: by mailgate.melita.com with Microsoft Mail
+	id <33AEFD34@mailgate.melita.com>; Mon, 23 Jun 97 15:48:20 PDT
+From: Karen Hazzah <khazzah@melita.com>
+To: "'Stefan.Dirsch@stud.uni-erlangen.de'" <Stefan.Dirsch@stud.uni-erlangen.de>
+Subject: Your post to vxd newsgroup
+Date: Sun, 22 Jun 97 20:51:00 PDT
+Message-ID: <33AEFD34@mailgate.melita.com>
+Encoding: 22 TEXT
+X-Mailer: Microsoft Mail V3.0
+
+
+I posted an answer to your question in the newsgroup. I also have
+additional information for you.
+
+I can email you the binary for VxD which does exactly what you need:
+given a physical address, returns a pointer that can be used by a
+Win32 application. I'll also give you source for a Win32 app which
+uses the VxD to read an area of physical memory.
+
+I don't offer this solution to everyone, since in most cases the
+proper solution is for them to write a VxD which interacts with their
+hardware, rather than simply getting a pointer to the hardware and
+interacting with it from an application.
+
+However, in your case, you're just using a VxD as a tool to get your
+Linux driver working...you shouldn't have to write a VxD for this :-)
+
+Let me know if you're interested.
+===============================================================================
+Hello Karen
+
+A long time ago, you sent me your VXD for reading an area of physical
+memory under Win32, so I could make register dumps of the graphic
+chip. Did I ever mention, that it works perfectly for me?
+
+Why I contact you is, that I really would like to offer this solution
+to all XFree86 members, so that it will be much easier in the future
+for XFree86 to develop drivers for graphic boards.
+
+Can I count with your agreement? Would you like to add a special
+copyright to your software?
+
+Stefan
+===============================================================================
+From KHazzah@melita.com  Wed Mar  4 00:00:28 1998
+Return-Path: <KHazzah@melita.com>
+Received: from melita.melita.com (melita.com [192.68.22.2])
+	by Galois.suse.de (8.8.8/8.8.8) with SMTP id AAA03709
+	for <sndirsch@suse.de>; Wed, 4 Mar 1998 00:00:26 +0100
+Received: from norcross.melita.com (norcross.melita.com [192.68.22.10]) by melita.melita.com (8.6.12/8.6.9) with ESMTP id TAA31217 for <sndirsch@suse.de>; Tue, 3 Mar 1998 19:48:10 -0500
+Received: by zippy.melita.com with Internet Mail Service (5.5.1960.3)
+	id <F5X7MBSS>; Tue, 3 Mar 1998 18:00:26 -0500
+Message-ID: <D8EE8292EB83D111A15E00805FA67447166532@zippy.melita.com>
+From: "Hazzah, Karen" <KHazzah@melita.com>
+To: Stefan Dirsch <sndirsch@suse.de>
+Subject: RE: VXD binary for Win32 for reading an area of physical memory
+Date: Tue, 3 Mar 1998 18:00:25 -0500 
+MIME-Version: 1.0
+X-Mailer: Internet Mail Service (5.5.1960.3)
+Content-Type: text/plain
+Status: ROr
+
+OK, you have my permission to make it publicly available, as is. 
+
+If you make it available on the web (ftp, etc.), please give me the
+URL so I can refer others to it.
diff --git a/vidix/bin/mapdev.vxd b/vidix/bin/mapdev.vxd
new file mode 100644
index 0000000000..e09194b842
--- /dev/null
+++ b/vidix/bin/mapdev.vxd
diff --git a/vidix/cyberblade_vid.c b/vidix/cyberblade_vid.c
index f0109bf81f..ebb4869226 100644
--- a/vidix/cyberblade_vid.c
+++ b/vidix/cyberblade_vid.c
@@ -46,9 +46,9 @@
 #include "vidix.h"
 #include "vidixlib.h"
 #include "fourcc.h"
-#include "../libdha/libdha.h"
-#include "../libdha/pci_ids.h"
-#include "../libdha/pci_names.h"
+#include "libdha.h"
+#include "pci_ids.h"
+#include "pci_names.h"
 #include "../config.h"
 
 #include "cyberblade_regs.h"
diff --git a/vidix/dhahelperwin/MAKEFILE b/vidix/dhahelperwin/MAKEFILE
new file mode 100644
index 0000000000..58189757d6
--- /dev/null
+++ b/vidix/dhahelperwin/MAKEFILE
@@ -0,0 +1,7 @@
+#
+# DO NOT EDIT THIS FILE!!!  Edit .\sources. if you want to add a new source
+# file to this component.  This file merely indirects to the real make file
+# that is shared by all the driver components of the Windows NT DDK
+#
+
+!INCLUDE $(NTMAKEENV)\makefile.def
diff --git a/vidix/dhahelperwin/SOURCES b/vidix/dhahelperwin/SOURCES
new file mode 100644
index 0000000000..e44aa06971
--- /dev/null
+++ b/vidix/dhahelperwin/SOURCES
@@ -0,0 +1,6 @@
+TARGETNAME=dhahelper
+TARGETPATH=.
+TARGETTYPE=DRIVER
+NTDEBUG=ntsd
+
+SOURCES= dhahelper.c
diff --git a/vidix/dhahelperwin/dhahelper.c b/vidix/dhahelperwin/dhahelper.c
new file mode 100644
index 0000000000..230d44a372
--- /dev/null
+++ b/vidix/dhahelperwin/dhahelper.c
@@ -0,0 +1,359 @@
+/******************************************************************************
+ * dhahelper.c: direct hardware access under Windows NT/2000/XP
+ * Copyright (c) 2004 Sascha Sommer <saschasommer@freenet.de>.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ *****************************************************************************/
+
+
+#include <ntddk.h>
+#include "dhahelper.h"
+
+#define OutputDebugString DbgPrint
+
+#define IOPM_SIZE 0x2000
+typedef char IOPM[IOPM_SIZE];
+static IOPM *pIOPM = NULL;
+
+
+
+typedef struct {
+  PMDL Mdl;
+  PVOID SystemVirtualAddress;
+  PVOID UserVirtualAddress;
+  ULONG PhysMemSizeInBytes;
+}alloc_priv;
+static alloc_priv* alloclist;
+static unsigned int alloccount=0;
+
+
+
+
+
+
+
+static NTSTATUS dhahelperdispatch(IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp);
+static void dhahelperunload(IN PDRIVER_OBJECT DriverObject);
+static NTSTATUS UnmapPhysicalMemory(PVOID UserVirtualAddress);
+static NTSTATUS MapPhysicalMemoryToLinearSpace(PVOID pPhysAddress,ULONG PhysMemSizeInBytes,PVOID *PhysMemLin);
+
+void Ke386SetIoAccessMap(int, IOPM *);
+void Ke386QueryIoAccessMap(int, IOPM *);
+void Ke386IoSetAccessProcess(PEPROCESS, int);
+
+
+
+
+//entry point
+NTSTATUS DriverEntry (IN PDRIVER_OBJECT DriverObject,IN PUNICODE_STRING RegistryPath){
+  UNICODE_STRING  DeviceNameUnicodeString;
+  UNICODE_STRING  DeviceLinkUnicodeString;
+  NTSTATUS        ntStatus;
+  PDEVICE_OBJECT  DeviceObject = NULL;
+
+  OutputDebugString ("dhahelper: entering DriverEntry");
+
+  RtlInitUnicodeString (&DeviceNameUnicodeString, L"\\Device\\DHAHELPER");
+
+  // Create an EXCLUSIVE device object (only 1 thread at a time
+  // can make requests to this device).
+
+  ntStatus = IoCreateDevice(DriverObject,0,&DeviceNameUnicodeString,FILE_DEVICE_DHAHELPER,0,TRUE,&DeviceObject);
+	
+  if (NT_SUCCESS(ntStatus)){
+    // Create dispatch points for device control, create, close.
+    DriverObject->MajorFunction[IRP_MJ_CREATE] =
+    DriverObject->MajorFunction[IRP_MJ_CLOSE] =
+    DriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL] = dhahelperdispatch;
+    DriverObject->DriverUnload = dhahelperunload;
+
+    // Create a symbolic link, e.g. a name that a Win32 app can specify
+    // to open the device.
+
+    RtlInitUnicodeString (&DeviceLinkUnicodeString, L"\\DosDevices\\DHAHELPER");
+
+    ntStatus = IoCreateSymbolicLink(&DeviceLinkUnicodeString,&DeviceNameUnicodeString);
+
+    if (!NT_SUCCESS(ntStatus)){
+      // Symbolic link creation failed- note this & then delete the
+      // device object (it's useless if a Win32 app can't get at it).
+      OutputDebugString ("dhahelper: IoCreateSymbolicLink failed");
+      IoDeleteDevice (DeviceObject);
+    }
+  }
+  else{
+    OutputDebugString ("dhahelper: IoCreateDevice failed");
+  }
+  OutputDebugString ("dhahelper: leaving DriverEntry");
+  return ntStatus;
+}
+
+
+// Process the IRPs sent to this device
+
+static NTSTATUS dhahelperdispatch(IN PDEVICE_OBJECT DeviceObject,IN PIRP Irp){
+  PIO_STACK_LOCATION IrpStack;
+  ULONG              dwInputBufferLength;
+  ULONG              dwOutputBufferLength;
+  ULONG              dwIoControlCode;
+  PVOID              pvIOBuffer;
+  NTSTATUS           ntStatus;
+  dhahelper_t      dhahelper_priv;
+
+  OutputDebugString ("dhahelper: entering dhahelperdispatch");
+
+  // Init to default settings
+
+  Irp->IoStatus.Status      = STATUS_SUCCESS;
+  Irp->IoStatus.Information = 0;
+  
+  IrpStack = IoGetCurrentIrpStackLocation(Irp);
+
+  // Get the pointer to the input/output buffer and it's length
+
+  pvIOBuffer           = Irp->AssociatedIrp.SystemBuffer;
+  dwInputBufferLength  = IrpStack->Parameters.DeviceIoControl.InputBufferLength;
+  dwOutputBufferLength = IrpStack->Parameters.DeviceIoControl.OutputBufferLength;
+
+  switch (IrpStack->MajorFunction){
+    case IRP_MJ_CREATE:
+      OutputDebugString("dhahelper: IRP_MJ_CREATE");
+      break;
+    case IRP_MJ_CLOSE:
+      OutputDebugString("dhahelper: IRP_MJ_CLOSE");
+      break;
+    case IRP_MJ_DEVICE_CONTROL:
+      OutputDebugString("dhahelper: IRP_MJ_DEVICE_CONTROL");
+      dwIoControlCode = IrpStack->Parameters.DeviceIoControl.IoControlCode;
+      switch (dwIoControlCode){
+        case IOCTL_DHAHELPER_ENABLEDIRECTIO:
+          OutputDebugString("dhahelper: IOCTL_DHAHELPER_ENABLEDIRECTIO");
+          pIOPM = MmAllocateNonCachedMemory(sizeof(IOPM));
+          if (pIOPM){
+            RtlZeroMemory(pIOPM, sizeof(IOPM));
+            Ke386IoSetAccessProcess(PsGetCurrentProcess(), 1);
+            Ke386SetIoAccessMap(1, pIOPM);
+          }
+          else Irp->IoStatus.Status = STATUS_INSUFFICIENT_RESOURCES;
+          break;
+        case IOCTL_DHAHELPER_DISABLEDIRECTIO:
+          OutputDebugString("dhahelper: IOCTL_DHAHELPER_DISABLEDIRECTIO");
+          if (pIOPM){
+            Ke386IoSetAccessProcess(PsGetCurrentProcess(), 0);
+            Ke386SetIoAccessMap(1, pIOPM);
+            MmFreeNonCachedMemory(pIOPM, sizeof(IOPM));
+            pIOPM = NULL;
+          }
+          break;
+        case IOCTL_DHAHELPER_MAPPHYSTOLIN:
+          OutputDebugString("dhahelper: IOCTL_DHAHELPER_MAPPHYSTOLIN");
+          if (dwInputBufferLength){
+            memcpy (&dhahelper_priv, pvIOBuffer, dwInputBufferLength);
+            ntStatus = MapPhysicalMemoryToLinearSpace(dhahelper_priv.base,dhahelper_priv.size,&dhahelper_priv.ptr);
+            if (NT_SUCCESS(ntStatus)){
+              memcpy (pvIOBuffer, &dhahelper_priv, dwInputBufferLength);
+              Irp->IoStatus.Information = dwInputBufferLength;
+            }
+            Irp->IoStatus.Status = ntStatus;
+          }
+          else Irp->IoStatus.Status = STATUS_INVALID_PARAMETER;
+        break;
+        case IOCTL_DHAHELPER_UNMAPPHYSADDR:
+          OutputDebugString("dhahelper: IOCTL_DHAHELPER_UNMAPPHYSADDR");
+          if (dwInputBufferLength){
+            memcpy (&dhahelper_priv, pvIOBuffer, dwInputBufferLength);
+            ntStatus = UnmapPhysicalMemory(dhahelper_priv.ptr);
+            Irp->IoStatus.Status = ntStatus;
+          }
+          else
+            Irp->IoStatus.Status = STATUS_INVALID_PARAMETER;
+            break;
+         default:
+          OutputDebugString("dhahelper: unknown IRP_MJ_DEVICE_CONTROL");
+          Irp->IoStatus.Status = STATUS_INVALID_PARAMETER;
+          break;
+      }
+      break;
+  }
+
+  // DON'T get cute and try to use the status field of the irp in the
+  // return status.  That IRP IS GONE as soon as you call IoCompleteRequest.
+
+  ntStatus = Irp->IoStatus.Status;
+
+  IoCompleteRequest (Irp, IO_NO_INCREMENT);
+
+  // We never have pending operation so always return the status code.
+
+  OutputDebugString("dhahelper: leaving dhahelperdispatch");
+
+  return ntStatus;
+}
+
+// Delete the associated device and return
+
+static void dhahelperunload(IN PDRIVER_OBJECT DriverObject){
+  UNICODE_STRING DeviceLinkUnicodeString;
+  NTSTATUS ntStatus=STATUS_SUCCESS;
+  OutputDebugString ("dhahelper: entering dhahelperunload");
+  OutputDebugString ("dhahelper: unmapping remaining memory");
+  
+  while(alloccount && (ntStatus==STATUS_SUCCESS))ntStatus = UnmapPhysicalMemory(alloclist[alloccount-1].UserVirtualAddress);
+  RtlInitUnicodeString (&DeviceLinkUnicodeString, L"\\DosDevices\\DHAHELPER");
+  ntStatus = IoDeleteSymbolicLink (&DeviceLinkUnicodeString);
+
+  if (NT_SUCCESS(ntStatus)){
+    IoDeleteDevice (DriverObject->DeviceObject);
+  }
+  else {
+    OutputDebugString ("dhahelper: IoDeleteSymbolicLink failed");
+  }
+  OutputDebugString ("dhahelper: leaving dhahelperunload");
+}
+
+
+
+
+
+
+/************************* memory mapping functions ******************************/
+//unlike the functions of other io helpers these functions allow to map adapter memory on windows xp
+//even if it has alread been mapped by the original driver
+//the technique used is described in
+//http://support.microsoft.com/default.aspx?scid=kb;en-us;q189327
+//furthermore it keeps a list of mapped areas to free them when the driver gets unloaded
+//I'm not sure what the limitations of ZwMapViewOfSection are but mapping 128MB videoram (that is probably already mapped by the gfxcard driver)
+//won't work so it is generally a good idea to map only the memory you really need
+
+static NTSTATUS MapPhysicalMemoryToLinearSpace(PVOID pPhysAddress,ULONG PhysMemSizeInBytes,PVOID *PhysMemLin){
+  alloc_priv* alloclisttmp;
+  PMDL Mdl=NULL;
+  PVOID SystemVirtualAddress=NULL;
+  PVOID UserVirtualAddress=NULL;
+  PHYSICAL_ADDRESS   pStartPhysAddress;
+  OutputDebugString ("dhahelper: entering MapPhysicalMemoryToLinearSpace");
+    
+  pStartPhysAddress.QuadPart = (ULONGLONG)pPhysAddress;
+  __try {
+    SystemVirtualAddress=MmMapIoSpace(pStartPhysAddress,PhysMemSizeInBytes, /*MmWriteCombined*/MmNonCached);
+    if(!SystemVirtualAddress){
+      OutputDebugString("dhahelper: MmMapIoSpace failed");
+      return STATUS_INVALID_PARAMETER;
+    } 
+    OutputDebugString("dhahelper: SystemVirtualAddress 0x%x",SystemVirtualAddress);
+    Mdl=IoAllocateMdl(SystemVirtualAddress, PhysMemSizeInBytes, FALSE, FALSE,NULL);
+    if(!Mdl){
+      OutputDebugString("dhahelper: IoAllocateMdl failed");
+      return STATUS_INSUFFICIENT_RESOURCES;
+    }
+    OutputDebugString("dhahelper: Mdl 0x%x",Mdl);
+    MmBuildMdlForNonPagedPool(Mdl);
+    UserVirtualAddress = (PVOID)(((ULONG)PAGE_ALIGN(MmMapLockedPages(Mdl,UserMode))) + MmGetMdlByteOffset(Mdl));
+    if(!UserVirtualAddress){
+      OutputDebugString("dhahelper: MmMapLockedPages failed");
+      return STATUS_INSUFFICIENT_RESOURCES;
+    }
+    OutputDebugString("dhahelper: UserVirtualAddress 0x%x",UserVirtualAddress);
+  }__except(EXCEPTION_EXECUTE_HANDLER){  
+       NTSTATU