UEFI HII: Merge UEFI HII support changes from branch.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@4599 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Library/GenericBdsLib/Ia32/ClearDr.asm

@@ -0,0 +1,43 @@
+  title   ClearDr.asm
+;------------------------------------------------------------------------------
+;
+; Copyright (c) 2004, Intel Corporation                                                         
+; 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.             
+; 
+; Module Name:
+;
+;   ClearDr.asm
+; 
+; Abstract:
+; 
+;   Clear dr0 dr1 register
+;
+;------------------------------------------------------------------------------
+
+  .686
+  .MODEL FLAT,C
+  .CODE
+
+;------------------------------------------------------------------------------
+;  VOID
+;  ClearDebugRegisters (
+;    VOID
+;    )
+;------------------------------------------------------------------------------
+ClearDebugRegisters PROC    PUBLIC
+    push   eax
+    xor    eax, eax
+    mov    dr0, eax
+    mov    dr1, eax
+    pop    eax
+    ret
+ClearDebugRegisters ENDP
+
+END
+