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diff --git a/OvmfPkg/AcpiS3SaveDxe/AcpiS3Save.h b/OvmfPkg/AcpiS3SaveDxe/AcpiS3Save.h
new file mode 100644
index 0000000000..65974a3402
--- /dev/null
+++ b/OvmfPkg/AcpiS3SaveDxe/AcpiS3Save.h
@@ -0,0 +1,59 @@
+/** @file
+  This is an implementation of the ACPI S3 Save protocol.  This is defined in 
+  S3 boot path specification 0.9.
+
+Copyright (c) 2006 - 2012, 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 _ACPI_S3_SAVE_H_
+#define _ACPI_S3_SAVE_H_
+
+/**
+  Gets the buffer of legacy memory below 1 MB 
+  This function is to get the buffer in legacy memory below 1MB that is required during S3 resume.
+
+  @param This           A pointer to the EFI_ACPI_S3_SAVE_PROTOCOL instance.
+  @param Size           The returned size of legacy memory below 1 MB.
+
+  @retval EFI_SUCCESS           Size is successfully returned.
+  @retval EFI_INVALID_PARAMETER The pointer Size is NULL.
+
+**/
+EFI_STATUS
+EFIAPI
+LegacyGetS3MemorySize (
+  IN  EFI_ACPI_S3_SAVE_PROTOCOL    * This,
+  OUT UINTN                        * Size
+  );
+
+/**
+  Prepares all information that is needed in the S3 resume boot path.
+  
+  Allocate the resources or prepare informations and save in ACPI variable set for S3 resume boot path  
+  
+  @param This                 A pointer to the EFI_ACPI_S3_SAVE_PROTOCOL instance.
+  @param LegacyMemoryAddress  The base address of legacy memory.
+
+  @retval EFI_NOT_FOUND         Some necessary information cannot be found.
+  @retval EFI_SUCCESS           All information was saved successfully.
+  @retval EFI_OUT_OF_RESOURCES  Resources were insufficient to save all the information.
+  @retval EFI_INVALID_PARAMETER The memory range is not located below 1 MB.
+
+**/
+EFI_STATUS
+EFIAPI
+S3Ready (
+  IN EFI_ACPI_S3_SAVE_PROTOCOL     *This,
+  IN VOID                          *LegacyMemoryAddress   
+  );
+#endif