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diff --git a/ReferenceCode/Chipset/SystemAgent/Guid/AcpiVariable/AcpiVariable.h b/ReferenceCode/Chipset/SystemAgent/Guid/AcpiVariable/AcpiVariable.h
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+/** @file
+  GUIDs used for ACPI variables.
+
+@copyright
+  Copyright (c) 1999 - 2012 Intel Corporation. All rights reserved
+  This software and associated documentation (if any) is furnished
+  under a license and may only be used or copied in accordance
+  with the terms of the license. Except as permitted by such
+  license, no part of this software or documentation may be
+  reproduced, stored in a retrieval system, or transmitted in any
+  form or by any means without the express written consent of
+  Intel Corporation.
+
+  This file contains an 'Intel Peripheral Driver' and uniquely
+  identified as "Intel Reference Module" and is
+  licensed for Intel CPUs and chipsets under the terms of your
+  license agreement with Intel or your vendor.  This file may
+  be modified by the user, subject to additional terms of the
+  license agreement
+**/
+#ifndef _ACPI_VARIABLE_H_
+#define _ACPI_VARIABLE_H_
+
+///
+/// RC Override: sync from R8HswClientPkg\Guid\AcpiVariable\AcpiVariable.h
+///
+#define EFI_ACPI_VARIABLE_GUID \
+  { \
+    0xc020489e, 0x6db2, 0x4ef2, 0x9a, 0xa5, 0xca, 0x6, 0xfc, 0x11, 0xd3, 0x6a \
+  }
+
+#define ACPI_GLOBAL_VARIABLE  L"AcpiGlobalVariable"
+
+///
+/// The following structure combine all ACPI related variables into one in order
+/// to boost performance
+///
+#pragma pack(1)
+typedef struct {
+  UINT16  Limit;
+  UINTN   Base;
+} PSEUDO_DESCRIPTOR;
+#pragma pack()
+
+typedef struct {
+  BOOLEAN               APState;
+  BOOLEAN               S3BootPath;
+  EFI_PHYSICAL_ADDRESS  WakeUpBuffer;
+  EFI_PHYSICAL_ADDRESS  GdtrProfile;
+  EFI_PHYSICAL_ADDRESS  IdtrProfile;
+  EFI_PHYSICAL_ADDRESS  CpuPrivateData;
+  EFI_PHYSICAL_ADDRESS  StackAddress;
+  EFI_PHYSICAL_ADDRESS  MicrocodePointerBuffer;
+  EFI_PHYSICAL_ADDRESS  SmramBase;
+  EFI_PHYSICAL_ADDRESS  SmmStartImageBase;
+  UINT32                SmmStartImageSize;
+  UINT32                NumberOfCpus;
+} ACPI_CPU_DATA;
+
+///
+/// Acpi Related variables
+///
+typedef struct {
+  EFI_PHYSICAL_ADDRESS  AcpiReservedMemoryBase;
+  UINT32                AcpiReservedMemorySize;
+  EFI_PHYSICAL_ADDRESS  S3ReservedLowMemoryBase;
+  EFI_PHYSICAL_ADDRESS  AcpiBootScriptTable;
+  EFI_PHYSICAL_ADDRESS  RuntimeScriptTableBase;
+  EFI_PHYSICAL_ADDRESS  AcpiFacsTable;
+  UINT64                SystemMemoryLength;
+  ACPI_CPU_DATA         AcpiCpuData;
+  EFI_PHYSICAL_ADDRESS  VideoOpromAddress; ///< VGA OPROM to support Video Re-POST for Linux S3
+  UINT32                VideoOpromSize;    ///< VGA OPROM to support Video Re-POST for Linux S3
+  EFI_PHYSICAL_ADDRESS  S3DebugBufferAddress;   ///< S3 Debug extension
+  EFI_PHYSICAL_ADDRESS  S3ResumeNvsEntryPoint;  ///< S3 Debug extension
+} ACPI_VARIABLE_SET;
+
+extern EFI_GUID gEfiAcpiVariableGuid;
+
+#endif