ArmPkg/ArmLib: Added new functions to access ARM coprocessors

Signed-off-by: Olivier Martin <olivier.martin@arm.com>



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13253 6f19259b-4bc3-4df7-8a09-765794883524

ArmPkg/Library/ArmLib/Common/ArmLib.c

@@ -1,6 +1,7 @@
 /** @file
 
   Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
+  Copyright (c) 2011 - 2012, ARM Ltd. All rights reserved.<BR>
   
   This program and the accompanying materials
   are licensed and made available under the terms and conditions of the BSD License
@@ -70,3 +71,13 @@ ArmSetAuxCrBit (
   ArmWriteAuxCr(val);
 }
 
+VOID
+EFIAPI
+ArmUnsetAuxCrBit (
+  IN  UINT32    Bits
+  )
+{
+  UINT32 val = ArmReadAuxCr();
+  val &= ~Bits;
+  ArmWriteAuxCr(val);
+}