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diff --git a/InOsEmuPkg/MetronomeDxe/Metronome.h b/InOsEmuPkg/MetronomeDxe/Metronome.h
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+++ b/InOsEmuPkg/MetronomeDxe/Metronome.h
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+/*++ @file
+  Emu Emulation Metronome Architectural Protocol Driver as defined in DXE CIS
+
+Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
+Portions copyright (c) 2010 - 2011, Apple Inc. 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.             
+
+**/
+
+#ifndef _EMU_THUNK_METRONOME_H_
+#define _EMU_THUNK_METRONOME_H_
+
+#include <PiDxe.h>
+
+#include <Library/BaseLib.h>
+#include <Library/DebugLib.h>
+#include <Library/UefiLib.h>
+#include <Library/UefiDriverEntryPoint.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/EmuThunkLib.h>
+
+#include <Protocol/Metronome.h>
+
+
+
+//
+// Period of on tick in 100 nanosecond units
+//
+#define TICK_PERIOD 2000
+
+//
+// Function Prototypes
+//
+
+EFI_STATUS
+EFIAPI
+EmuMetronomeDriverInitialize (
+  IN EFI_HANDLE        ImageHandle,
+  IN EFI_SYSTEM_TABLE  *SystemTable
+  );
+
+EFI_STATUS
+EFIAPI
+EmuMetronomeDriverWaitForTick (
+  IN EFI_METRONOME_ARCH_PROTOCOL  *This,
+  IN UINT32                       TickNumber
+  );
+
+#endif