From faf2c63b4a0fdd93576a76c3f90f9f8f3abeaf58 Mon Sep 17 00:00:00 2001 From: Jiewen Yao Date: Wed, 21 Sep 2016 11:09:42 +0800 Subject: [PATCH] UefiCpuPkg/Include: Add MicrocodeFlashAccessLib header. This library is used to abstract microcode flash region access. This library is consumed by a microcode capsule update module. Cc: Jeff Fan Cc: Feng Tian Cc: Star Zeng Cc: Michael D Kinney Cc: Liming Gao Cc: Chao Zhang Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Jiewen Yao Reviewed-by: Jeff Fan Reviewed-by: Michael Kinney --- .../Include/Library/MicrocodeFlashAccessLib.h | 39 +++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 UefiCpuPkg/Include/Library/MicrocodeFlashAccessLib.h diff --git a/UefiCpuPkg/Include/Library/MicrocodeFlashAccessLib.h b/UefiCpuPkg/Include/Library/MicrocodeFlashAccessLib.h new file mode 100644 index 0000000000..0dfc3ef376 --- /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.
+ 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[in] FlashAddress The address of flash device to be accessed. + @param[in] Buffer The pointer to the data buffer. + @param[in] 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 -- 2.39.2