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diff --git a/MdePkg/Include/Protocol/Runtime.h b/MdePkg/Include/Protocol/Runtime.h
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+/** @file
+  Runtime Architectural Protocol as defined in DXE CIS
+
+  This code is used to produce the EFI 1.0 runtime virtual switch over
+
+  This driver must add SetVirtualAddressMap () and ConvertPointer () to
+  the EFI system table. This driver is not responcible for CRCing the 
+  EFI system table.
+
+  This driver will add EFI_RUNTIME_ARCH_PROTOCOL_GUID protocol with a 
+  pointer to the Runtime Arch Protocol instance structure. The protocol
+  member functions are used by the DXE core to export information need
+  by this driver to produce the runtime transition to virtual mode
+  calling.
+
+  Copyright (c) 2006, 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:  Runtime.h
+
+  @par Revision Reference:
+  Version 0.91.
+
+**/
+
+#ifndef __ARCH_PROTOCOL_RUNTIME_H__
+#define __ARCH_PROTOCOL_RUNTIME_H__
+
+//
+// Global ID for the Runtime Architectural Protocol
+//
+#define EFI_RUNTIME_ARCH_PROTOCOL_GUID \
+  { 0xb7dfb4e1, 0x52f, 0x449f, {0x87, 0xbe, 0x98, 0x18, 0xfc, 0x91, 0xb7, 0x33 } }
+
+typedef struct _EFI_RUNTIME_ARCH_PROTOCOL  EFI_RUNTIME_ARCH_PROTOCOL;
+
+//
+// LIST_ENTRY from BaseType 
+//
+typedef LIST_ENTRY EFI_LIST_ENTRY;
+
+typedef struct _EFI_RUNTIME_IMAGE_ENTRY  EFI_RUNTIME_IMAGE_ENTRY;
+
+struct _EFI_RUNTIME_IMAGE_ENTRY {
+  VOID                    *ImageBase;
+  UINT64                  ImageSize;
+  VOID                    *RelocationData;
+  EFI_HANDLE              Handle;
+  EFI_LIST_ENTRY          Link;
+};
+
+typedef struct _EFI_RUNTIME_EVENT_ENTRY  EFI_RUNTIME_EVENT_ENTRY;
+
+struct _EFI_RUNTIME_EVENT_ENTRY {
+  UINT32                  Type;
+  EFI_TPL                 NotifyTpl;
+  EFI_EVENT_NOTIFY        NotifyFunction;
+  VOID                    *NotifyContext;
+  EFI_EVENT               *Event;
+  EFI_LIST_ENTRY          Link;
+};
+
+//
+// Interface stucture for the Runtime Architectural Protocol
+//
+/**
+  @par Protocol Description:
+  Allows the runtime functionality of the DXE Foundation to be contained in a 
+  separate driver. It also provides hooks for the DXE Foundation to export 
+  information that is needed at runtime. As such, this protocol allows the DXE 
+  Foundation to manage runtime drivers and events. This protocol also implies 
+  that the runtime services required to transition to virtual mode, 
+  SetVirtualAddressMap() and ConvertPointer(), have been registered into the 
+  EFI Runtime Table in the EFI System Partition.  This protocol must be produced 
+  by a runtime DXE driver and may only be consumed by the DXE Foundation.
+
+  @param ImageHead
+  A list of type EFI_RUNTIME_IMAGE_ENTRY.
+
+  @param EventHead
+  A list of type EFI_RUNTIME_EVENT_ENTRY.
+
+  @param MemoryDescriptorSize
+  Size of a memory descriptor that is return by GetMemoryMap().
+
+  @param MemoryDescriptorVersion
+  Version of a memory descriptor that is return by GetMemoryMap().
+
+  @param MemoryMapSize 
+  Size of the memory map in bytes contained in MemoryMapPhysical and MemoryMapVirtual. 
+
+  @param MemoryMapPhysical
+  Pointer to a runtime buffer that contains a copy of 
+  the memory map returned via GetMemoryMap().
+
+  @param MemoryMapVirtual
+  Pointer to MemoryMapPhysical that is updated to virtual mode after SetVirtualAddressMap().
+
+  @param VirtualMode
+  Boolean that is TRUE if SetVirtualAddressMap() has been called.
+
+  @param AtRuntime
+  Boolean that is TRUE if ExitBootServices () has been called.
+
+**/
+struct _EFI_RUNTIME_ARCH_PROTOCOL {
+  EFI_LIST_ENTRY          ImageHead;
+  EFI_LIST_ENTRY          EventHead;
+  UINTN                   MemoryDescriptorSize;
+  UINT32                  MemoryDesciptorVersion;
+  UINTN                   MemoryMapSize;
+  EFI_MEMORY_DESCRIPTOR   *MemoryMapPhysical;
+  EFI_MEMORY_DESCRIPTOR   *MemoryMapVirtual;
+  BOOLEAN                 VirtualMode;
+  BOOLEAN                 AtRuntime;
+};
+
+extern EFI_GUID gEfiRuntimeArchProtocolGuid;
+
+#endif