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diff --git a/MdeModulePkg/Universal/DebugServicePei/DebugService.h b/MdeModulePkg/Universal/DebugServicePei/DebugService.h
new file mode 100644
index 0000000000..3e234f76b6
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+++ b/MdeModulePkg/Universal/DebugServicePei/DebugService.h
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+/** @file
+  Header file of Debug services instances.
+
+  Copyright (c) 2019, 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
+  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.
+
+**/
+#ifndef __DEBUG_SERVICE_H__
+#define __DEBUG_SERVICE_H__
+
+#include <Ppi/Debug.h>
+
+/**
+  Print a debug message to debug output device if the specified error level
+  is enabled.
+
+  @param[in] ErrorLevel               The error level of the debug message.
+  @param[in] Format                   Format string for the debug message to print.
+  @param[in] Marker                   BASE_LIST marker for the variable argument list.
+
+**/
+VOID
+EFIAPI
+PeiDebugBPrint(
+  IN UINTN                          ErrorLevel,
+  IN CONST CHAR8                    *Format,
+  IN BASE_LIST                      Marker
+  );
+
+/**
+  Prints an assert message containing a filename, line number, and description.
+  This may be followed by a breakpoint or a dead loop.
+
+  @param[in] FileName                 The pointer to the name of the source file that
+                                      generated the assert condition.
+  @param[in] LineNumber               The line number in the source file that generated
+                                      the assert condition
+  @param[in] Description              The pointer to the description of the assert condition.
+
+**/
+VOID
+EFIAPI
+PeiDebugAssert(
+  IN CONST CHAR8                    *FileName,
+  IN UINTN                          LineNumber,
+  IN CONST CHAR8                    *Description
+  );
+
+#endif