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diff --git a/ReferenceCode/Chipset/LynxPoint/Ppi/PchDmiTcVcMap/PchDmiTcVcMap.h b/ReferenceCode/Chipset/LynxPoint/Ppi/PchDmiTcVcMap/PchDmiTcVcMap.h
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+++ b/ReferenceCode/Chipset/LynxPoint/Ppi/PchDmiTcVcMap/PchDmiTcVcMap.h
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+/** @file
+  This file defines the PCH DMI TC/VC mapping PPI
+
+@copyright
+  Copyright (c) 2009 - 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 a 'Sample Driver' and is licensed as such
+  under the terms of your license agreement with Intel or your
+  vendor.  This file may be modified by the user, subject to
+  the additional terms of the license agreement
+**/
+#ifndef _PCH_DMI_TC_VC_MAP_H_
+#define _PCH_DMI_TC_VC_MAP_H_
+
+///
+/// Define the PCH DMI TC VC Mapping PPI GUID
+///
+///
+/// EDK and EDKII have different GUID formats
+///
+#if !defined(EDK_RELEASE_VERSION) || (EDK_RELEASE_VERSION < 0x00020000)
+#define PCH_DMI_TC_VC_PPI_GUID \
+  { \
+    0xed097352, 0x9041, 0x445a, 0x80, 0xb6, 0xb2, 0x9d, 0x50, 0x9e, 0x88, 0x45 \
+  }
+#else
+#define PCH_DMI_TC_VC_PPI_GUID \
+  { \
+    0xed097352, 0x9041, 0x445a, \
+    { \
+      0x80, 0xb6, 0xb2, 0x9d, 0x50, 0x9e, 0x88, 0x45 \
+    } \
+  }
+#endif
+//
+// Extern the GUID for PPI users.
+//
+extern EFI_GUID                   gPchDmiTcVcMapPpiGuid;
+
+//
+// Forward reference for ANSI C compatibility
+//
+typedef struct _PCH_DMI_TC_VC_PPI PCH_DMI_TC_VC_PPI;
+
+typedef enum {
+  DmiVcTypeVc0,
+  DmiVcTypeVc1,
+  DmiVcTypeVcp,
+  DmiVcTypeVcm,
+  DmiVcTypeMax
+} PCH_DMI_VC_TYPE;
+
+typedef struct {
+  PCH_DMI_VC_TYPE Vc; ///< The Virtual Channel to which the TC is mapped
+} PCH_DMI_TC_CONFIG;
+
+typedef struct {
+  BOOLEAN Enable;     ///< 0: Disable; 1: Enable
+  UINT8   VcId;       ///< Vc ID Encoding for the Virtual Channel
+} PCH_DMI_VC_CONFIG;
+
+#define DmiTcTypeMax  8
+
+///
+/// PCH_DMI_TC_VC_PPI Structure Definition
+/// Note: The default DMI TC/VC mapping will be used if it's not initialized
+///
+struct _PCH_DMI_TC_VC_PPI {
+  PCH_DMI_TC_CONFIG DmiTc[DmiTcTypeMax];  ///< Configures PCH DMI Traffic class mapping.
+  PCH_DMI_VC_CONFIG DmiVc[DmiVcTypeMax];  ///< Configures PCH DMI Virtual Channel setting.
+};
+
+#endif