Adding a Debug version of the UncachedMemoryAllocationLib that will make the PCI DMA address not match the CPU C address for a DMA buffer. The PCI DMA address will generate a page fault if accessed from the CPU. This should make it easy to debug EFI DMA code to make sure it is following the correct rules for which pointer to use.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9725 6f19259b-4bc3-4df7-8a09-765794883524

ArmPkg/Library/DebugUncachedMemoryAllocationLib/DebugUncachedMemoryAllocationLib.inf

@@ -0,0 +1,47 @@
+#/** @file
+# 
+#
+# Copyright (c) 2008 - 2010, Apple Inc. All rights reserved
+#
+#  All rights reserved. This program and the accompanying materials
+#  are licensed and made available under the terms and conditions of the BSD License
+#  which accompanies this distribution. The full text of the license may be found at
+#  http://opensource.org/licenses/bsd-license.php
+#  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+#
+#**/
+
+[Defines]
+  INF_VERSION                    = 0x00010005
+  BASE_NAME                      = UncachedMemoryAllocationLib
+  FILE_GUID                      = 3C1EA826-696A-4E8A-B89D-3C5369B84F2A
+  MODULE_TYPE                    = DXE_DRIVER
+  VERSION_STRING                 = 1.0
+  LIBRARY_CLASS                  = UncachedMemoryAllocationLib
+  CONSTRUCTOR                    = DebugUncachedMemoryAllocationLibConstructor
+
+[Sources.common]
+  DebugUncachedMemoryAllocationLib.c
+
+[Packages]
+  MdePkg/MdePkg.dec
+  ArmPkg/ArmPkg.dec
+
+[Protocols]
+  gEfiCpuArchProtocolGuid
+
+[LibraryClasses]
+  BaseLib
+  UefiMemoryAllocationLib
+  ArmLib
+
+
+[FixedPcd]
+  gArmTokenSpaceGuid.PcdArmUncachedMemoryMask
+  
+  
+[Depex]
+  gEfiCpuArchProtocolGuid
+  gVirtualUncachedPagesProtocolGuid