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/** @file
This file defines NvDataFv GUID and FTW working block structure header.
This guid can be used as FileSystemGuid in EFI_FIRMWARE_VOLUME_HEADER if
this FV image contains NV data, such as NV variable data.
This guid can also be used as the signature of FTW working block header.
Copyright (c) 2006 - 2010, 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 that 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 __SYSTEM_NV_DATA_GUID_H__
#define __SYSTEM_NV_DATA_GUID_H__
#define EFI_SYSTEM_NV_DATA_FV_GUID \
{0xfff12b8d, 0x7696, 0x4c8b, {0xa9, 0x85, 0x27, 0x47, 0x7, 0x5b, 0x4f, 0x50} }
///
/// An NvDataFv GUID used as the signature of FTW working block header.
///
extern EFI_GUID gEfiSystemNvDataFvGuid;
#define WORKING_BLOCK_VALID 0x1
#define WORKING_BLOCK_INVALID 0x2
///
/// The EDKII Fault tolerant working block header.
/// The header is immediately followed by the write queue data.
///
typedef struct {
///
/// System Non Volatile FV Guid.
///
EFI_GUID Signature;
///
/// 32bit CRC caculated for this header.
///
UINT32 Crc;
///
/// Working block valid bit.
///
UINT8 WorkingBlockValid : 1;
UINT8 WorkingBlockInvalid : 1;
UINT8 Reserved : 6;
UINT8 Reserved3[3];
///
/// Total size of the following write queue range.
///
UINT64 WriteQueueSize;
///
/// Write Queue data.
///
UINT8 WriteQueue[WriteQueueSize];
///
} EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER;
#endif
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