1. Introduce the API MtrrGetDefaultMemoryType () in Mtrr Library.

2. Invoke MtrrGetDefaultMemoryType() to get the default memory type instead of the hard code value in module.
3. Add go though for UC attributes.

Signed-off-by: vanjeff
Reviewed-by: rsun3

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12587 6f19259b-4bc3-4df7-8a09-765794883524

UefiCpuPkg/Include/Library/MtrrLib.h

@@ -1,7 +1,7 @@
 /** @file
   MTRR setting library
 
-  Copyright (c) 2008 - 2010, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2008 - 2011, Intel Corporation. All rights reserved.<BR>
   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
@@ -331,4 +331,16 @@ IsMtrrSupported (
   VOID
   );
 
+/**
+  Returns the default MTRR cache type for the system.
+
+  @return  The default MTRR cache type.
+
+**/
+MTRR_MEMORY_CACHE_TYPE
+EFIAPI
+MtrrGetDefaultMemoryType (
+  VOID
+  );
+
 #endif // _MTRR_LIB_H_