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diff --git a/MdeModulePkg/Include/Guid/DebugMask.h b/MdeModulePkg/Include/Guid/DebugMask.h
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+++ b/MdeModulePkg/Include/Guid/DebugMask.h
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+/** @file
+
+  Debug Mask Protocol.
+
+Copyright (c) 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 that 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.
+
+**/
+
+#ifndef __DEBUG_MASK_H__
+#define __DEBUG_MASK_H__
+
+///
+/// Protocol GUID for DXE Phase Debug Mask support
+///
+#define EFI_DEBUG_MASK_PROTOCOL_GUID \
+  { 0x4c8a2451, 0xc207, 0x405b, {0x96, 0x94, 0x99, 0xea, 0x13, 0x25, 0x13, 0x41} }
+
+///
+/// Forward reference for pure ANSI compatability
+///
+typedef struct _EFI_DEBUG_MASK_PROTOCOL  EFI_DEBUG_MASK_PROTOCOL;
+
+///
+///
+///  
+#define EFI_DEBUG_MASK_REVISION        0x00010000
+
+//
+// DebugMask member functions definition
+//
+typedef
+EFI_STATUS
+(EFIAPI * EFI_GET_DEBUG_MASK) (
+  IN EFI_DEBUG_MASK_PROTOCOL  *This,             
+  IN OUT UINTN                *CurrentDebugMask  
+  );
+
+typedef 
+EFI_STATUS
+(EFIAPI *EFI_SET_DEBUG_MASK) (
+  IN EFI_DEBUG_MASK_PROTOCOL  *This,
+  IN UINTN                    NewDebugMask
+  );
+
+///
+/// DebugMask protocol definition
+///
+struct _EFI_DEBUG_MASK_PROTOCOL {
+  INT64               Revision;
+  EFI_GET_DEBUG_MASK  GetDebugMask;
+  EFI_SET_DEBUG_MASK  SetDebugMask;
+};
+
+extern EFI_GUID gEfiDebugMaskProtocolGuid;
+
+///
+/// GUID used to store the global debug mask in an the "EFIDebug" EFI Variabe
+///
+#define EFI_GENERIC_VARIABLE_GUID \
+  { 0x59d1c24f, 0x50f1, 0x401a, {0xb1, 0x01, 0xf3, 0x3e, 0x0d, 0xae, 0xd4, 0x43} }
+  
+#define DEBUG_MASK_VARIABLE_NAME  L"EFIDebug"
+
+extern EFI_GUID gEfiGenericVariableGuid;
+
+#endif