/** @file  
  This file defines NvDataFv GUID and FTW working block structures.
  The NvDataFv GUID can be used as FileSystemGuid in EFI_FIRMWARE_VOLUME_HEADER if 
  this FV image contains NV data, such as NV variable data.
  This file also defines WorkingBlockSignature GUID for FTW working block signature.

Copyright (c) 2006 - 2015, 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} }

#define EDKII_WORKING_BLOCK_SIGNATURE_GUID \
  {0x9e58292b, 0x7c68, 0x497d, {0xa0, 0xce, 0x65,  0x0, 0xfd, 0x9f, 0x1b, 0x95} }

extern EFI_GUID gEfiSystemNvDataFvGuid;
extern EFI_GUID gEdkiiWorkingBlockSignatureGuid;

#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 {
  ///
  /// FTW working block signature.
  /// Its value has be updated from gEfiSystemNvDataFvGuid to gEdkiiWorkingBlockSignatureGuid,
  /// because its write queue data format has been updated to support the crossing archs.
  ///
  EFI_GUID  Signature;
  ///
  /// 32bit CRC calculated 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.
  ///
  /// EFI_FAULT_TOLERANT_WRITE_HEADER FtwHeader;
  /// EFI_FAULT_TOLERANT_WRITE_RECORD FtwRecord[FtwHeader.NumberOfWrites]
  /// EFI_FAULT_TOLERANT_WRITE_HEADER FtwHeader2;
  /// EFI_FAULT_TOLERANT_WRITE_RECORD FtwRecord2[FtwHeader2.NumberOfWrites]
  /// ...
  ///
} EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER;

#define FTW_VALID_STATE     0
#define FTW_INVALID_STATE   1

//
// EFI Fault tolerant block update write queue entry.
//
typedef struct {
  UINT8     HeaderAllocated : 1;
  UINT8     WritesAllocated : 1;
  UINT8     Complete : 1;
  UINT8     Reserved : 5;
  EFI_GUID  CallerId;
  UINT64    NumberOfWrites;
  UINT64    PrivateDataSize;
} EFI_FAULT_TOLERANT_WRITE_HEADER;

//
// EFI Fault tolerant block update write queue record.
//
typedef struct {
  UINT8   BootBlockUpdate : 1;
  UINT8   SpareComplete : 1;
  UINT8   DestinationComplete : 1;
  UINT8   Reserved : 5;
  EFI_LBA Lba;
  UINT64  Offset;
  UINT64  Length;
  //
  // Relative offset to spare block.
  //
  INT64   RelativeOffset;
  //
  // UINT8    PrivateData[PrivateDataSize]
  //
} EFI_FAULT_TOLERANT_WRITE_RECORD;

#define FTW_RECORD_SIZE(PrivateDataSize)  (sizeof (EFI_FAULT_TOLERANT_WRITE_RECORD) + (UINTN) PrivateDataSize)

#define FTW_RECORD_TOTAL_SIZE(NumberOfWrites, PrivateDataSize) \
    ((UINTN) (NumberOfWrites) * (sizeof (EFI_FAULT_TOLERANT_WRITE_RECORD) + (UINTN) PrivateDataSize))

#define FTW_WRITE_TOTAL_SIZE(NumberOfWrites, PrivateDataSize) \
    ( \
      sizeof (EFI_FAULT_TOLERANT_WRITE_HEADER) + (UINTN) (NumberOfWrites) * \
      (sizeof (EFI_FAULT_TOLERANT_WRITE_RECORD) + (UINTN) PrivateDataSize) \
    )

#endif
