[PATCH 25/45] UefiCpuPkg/Include: Add MicrocodeFlashAccessLib header.


Yao, Jiewen
 

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@...>
Cc: Feng Tian <feng.tian@...>
Cc: Star Zeng <star.zeng@...>
Cc: Michael D Kinney <michael.d.kinney@...>
Cc: Liming Gao <liming.gao@...>
Cc: Chao Zhang <chao.b.zhang@...>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jiewen Yao <jiewen.yao@...>
---
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

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