audk/MdePkg/Include/Uefi/UefiGpt.h

124 lines
3.5 KiB
C

/** @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 SIGNATURE_64 ('E','F','I',' ','P','A','R','T')
#pragma pack(1)
///
/// GPT Partition Table Header
///
typedef struct {
///
/// The table header for the GPT partition Table.
/// This header contains EFI_PTAB_HEADER_ID
///
EFI_TABLE_HEADER Header;
///
/// The LBA that contains this data structure.
///
EFI_LBA MyLBA;
///
/// LBA address of the alternate GUID Partition Table Header.
///
EFI_LBA AlternateLBA;
///
/// The first usable logical block that may be used
/// by a partition described by a GUID Partition Entry.
///
EFI_LBA FirstUsableLBA;
///
/// The last usable logical block that may be used
/// by a partition described by a GUID Partition Entry.
///
EFI_LBA LastUsableLBA;
///
/// GUID that can be used to uniquely identify the disk.
///
EFI_GUID DiskGUID;
///
/// The starting LBA of the GUID Partition Entry array.
///
EFI_LBA PartitionEntryLBA;
///
/// The number of Partition Entries in the GUID Partition Entry array.
///
UINT32 NumberOfPartitionEntries;
///
/// The size, in bytes, of each the GUID Partition
/// Entry structures in the GUID Partition Entry
/// array. Must be a multiple of 8.
///
UINT32 SizeOfPartitionEntry;
///
/// The CRC32 of the GUID Partition Entry array.
/// Starts at PartitionEntryLBA and is
/// computed over a byte length of
/// NumberOfPartitionEntries * SizeOfPartitionEntry.
///
UINT32 PartitionEntryArrayCRC32;
} EFI_PARTITION_TABLE_HEADER;
///
/// GPT Partition Entry
///
typedef struct {
///
/// Unique ID that defines the purpose and type of this Partition. A value of
/// zero defines that this partition entry is not being used.
///
EFI_GUID PartitionTypeGUID;
///
/// GUID that is unique for every partition entry. Every partition ever
/// created will have a unique GUID.
/// This GUID must be assigned when the GUID Partition Entry is created.
///
EFI_GUID UniquePartitionGUID;
///
/// Starting LBA of the partition defined by this entry
///
EFI_LBA StartingLBA;
///
/// Ending LBA of the partition defined by this entry.
///
EFI_LBA EndingLBA;
///
/// Attribute bits, all bits reserved by UEFI
/// Bit 0 Required for the platform to function.
/// Bits 1-47 Undefined and must be zero.
/// Bits 48-63 Reserved for GUID specific use.
///
UINT64 Attributes;
///
/// Unicode string.
///
CHAR16 PartitionName[36];
} EFI_PARTITION_ENTRY;
#pragma pack()
#endif