2 EFI Guid Partition Table Format Definition.
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5 All rights reserved. This program and the accompanying materials
6 are licensed and made available under the terms and conditions of the BSD License
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11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
15 #ifndef __UEFI_GPT_H__
16 #define __UEFI_GPT_H__
19 /// The primary GUID Partition Table Header must be
20 /// located in LBA 1 (i.e., the second logical block).
22 #define PRIMARY_PART_HEADER_LBA 1
24 /// EFI Partition Table Signature: "EFI PART"
26 #define EFI_PTAB_HEADER_ID SIGNATURE_64 ('E','F','I',' ','P','A','R','T')
31 /// GPT Partition Table Header
35 /// The table header for the GPT partition Table.
36 /// This header contains EFI_PTAB_HEADER_ID
38 EFI_TABLE_HEADER Header
;
40 /// The LBA that contains this data structure.
44 /// LBA address of the alternate GUID Partition Table Header.
48 /// The first usable logical block that may be used
49 /// by a partition described by a GUID Partition Entry.
51 EFI_LBA FirstUsableLBA
;
53 /// The last usable logical block that may be used
54 /// by a partition described by a GUID Partition Entry.
56 EFI_LBA LastUsableLBA
;
58 /// GUID that can be used to uniquely identify the disk.
62 /// The starting LBA of the GUID Partition Entry array.
64 EFI_LBA PartitionEntryLBA
;
66 /// The number of Partition Entries in the GUID Partition Entry array.
68 UINT32 NumberOfPartitionEntries
;
70 /// The size, in bytes, of each the GUID Partition
71 /// Entry structures in the GUID Partition Entry
72 /// array. Must be a multiple of 8.
74 UINT32 SizeOfPartitionEntry
;
76 /// The CRC32 of the GUID Partition Entry array.
77 /// Starts at PartitionEntryLBA and is
78 /// computed over a byte length of
79 /// NumberOfPartitionEntries * SizeOfPartitionEntry.
81 UINT32 PartitionEntryArrayCRC32
;
82 } EFI_PARTITION_TABLE_HEADER
;
85 /// GPT Partition Entry
89 /// Unique ID that defines the purpose and type of this Partition. A value of
90 /// zero defines that this partition entry is not being used.
92 EFI_GUID PartitionTypeGUID
;
94 /// GUID that is unique for every partition entry. Every partition ever
95 /// created will have a unique GUID.
96 /// This GUID must be assigned when the GUID Partition Entry is created.
98 EFI_GUID UniquePartitionGUID
;
100 /// Starting LBA of the partition defined by this entry
104 /// Ending LBA of the partition defined by this entry.
108 /// Attribute bits, all bits reserved by UEFI
109 /// Bit 0 Required for the platform to function.
110 /// Bits 1-47 Undefined and must be zero.
111 /// Bits 48-63 Reserved for GUID specific use.
117 CHAR16 PartitionName
[36];
118 } EFI_PARTITION_ENTRY
;