MdePkg/Include/Uefi/UefiGpt.h

/** @file
  EFI Guid Partition Table Format Definition.

  Copyright (c) 2006 - 2008, 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 __UEFI_GPT_H__
#define __UEFI_GPT_H__

///
/// The primary GUID Partition Table Header must be
/// located in LBA 1 (i.e., the second logical block).
///
#define PRIMARY_PART_HEADER_LBA 1

///
/// EFI Partition Table Signature: "EFI PART"
/// 
#define EFI_PTAB_HEADER_ID      0x5452415020494645ULL

#pragma pack(1)

///
/// GPT Partition Table Header
///
typedef struct {
  EFI_TABLE_HEADER  Header;
  EFI_LBA           MyLBA;
  EFI_LBA           AlternateLBA;
  EFI_LBA           FirstUsableLBA;
  EFI_LBA           LastUsableLBA;
  EFI_GUID          DiskGUID;
  EFI_LBA           PartitionEntryLBA;
  UINT32            NumberOfPartitionEntries;
  UINT32            SizeOfPartitionEntry;
  UINT32            PartitionEntryArrayCRC32;
} EFI_PARTITION_TABLE_HEADER;

///
/// GPT Partition Entry
///
typedef struct {
  EFI_GUID  PartitionTypeGUID;
  EFI_GUID  UniquePartitionGUID;
  EFI_LBA   StartingLBA;
  EFI_LBA   EndingLBA;
  UINT64    Attributes;
  CHAR16    PartitionName[36];
} EFI_PARTITION_ENTRY;

#pragma pack()
#endif