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diff --git a/src/VBox/Devices/EFI/Firmware/SecurityPkg/Include/Library/RpmcLib.h b/src/VBox/Devices/EFI/Firmware/SecurityPkg/Include/Library/RpmcLib.h
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+++ b/src/VBox/Devices/EFI/Firmware/SecurityPkg/Include/Library/RpmcLib.h
@@ -0,0 +1,43 @@
+/** @file
+ Public definitions for the Replay Protected Monotonic Counter (RPMC) Library.
+
+Copyright (c) 2020, Intel Corporation. All rights reserved.<BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef _RPMC_LIB_H_
+#define _RPMC_LIB_H_
+
+#include <Uefi/UefiBaseType.h>
+
+/**
+ Requests the monotonic counter from the designated RPMC counter.
+
+ @param[out] CounterValue A pointer to a buffer to store the RPMC value.
+
+ @retval EFI_SUCCESS The operation completed successfully.
+ @retval EFI_DEVICE_ERROR A device error occurred while attempting to update the counter.
+ @retval EFI_UNSUPPORTED The operation is un-supported.
+**/
+EFI_STATUS
+EFIAPI
+RequestMonotonicCounter (
+ OUT UINT32 *CounterValue
+ );
+
+/**
+ Increments the monotonic counter in the SPI flash device by 1.
+
+ @retval EFI_SUCCESS The operation completed successfully.
+ @retval EFI_DEVICE_ERROR A device error occurred while attempting to update the counter.
+ @retval EFI_UNSUPPORTED The operation is un-supported.
+**/
+EFI_STATUS
+EFIAPI
+IncrementMonotonicCounter (
+ VOID
+ );
+
+#endif
+