[PATCH V4 2/7] UefiCpuPkg/Include: Add MicrocodeFlashAccessLib header.

[Jiewen Yao <jiewen.yao@intel.com>]

This library is used to abstract microcode flash region access.
This library is consumed by a microcode capsule update module.

Cc: Jeff Fan <jeff.fan@intel.com>
Cc: Feng Tian <feng.tian@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Chao Zhang <chao.b.zhang@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jiewen Yao <jiewen.yao@intel.com>
Reviewed-by: Jeff Fan <jeff.fan@intel.com>
---
 UefiCpuPkg/Include/Library/MicrocodeFlashAccessLib.h | 39 ++++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/UefiCpuPkg/Include/Library/MicrocodeFlashAccessLib.h b/UefiCpuPkg/Include/Library/MicrocodeFlashAccessLib.h
new file mode 100644
index 0000000..fe2f630
--- /dev/null
+++ b/UefiCpuPkg/Include/Library/MicrocodeFlashAccessLib.h
@@ -0,0 +1,39 @@
+/** @file
+  Microcode flash device access library.
+
+  Copyright (c) 2016, 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 __MICROCODE_FLASH_ACCESS_LIB_H__
+#define __MICROCODE_FLASH_ACCESS_LIB_H__
+
+/**
+  Perform microcode write opreation.
+
+  @param FlashAddress      The address of flash device to be accessed.
+  @param Buffer            The pointer to the data buffer.
+  @param Length            The length of data buffer in bytes.
+
+  @retval EFI_SUCCESS           The operation returns successfully.
+  @retval EFI_WRITE_PROTECTED   The flash device is read only.
+  @retval EFI_UNSUPPORTED       The flash device access is unsupported.
+  @retval EFI_INVALID_PARAMETER The input parameter is not valid.
+**/
+EFI_STATUS
+EFIAPI
+MicrocodeFlashWrite (
+  IN EFI_PHYSICAL_ADDRESS         FlashAddress,
+  IN VOID                         *Buffer,
+  IN UINTN                        Length
+  );
+
+#endif
-- 
2.7.4.windows.1