OvmfPkg ResetSystemLib: Fix build issue with VS2005
[mirror_edk2.git] / MdePkg / Include / Uefi / UefiGpt.h
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c311f86b 1/** @file\r
959ccb23 2 EFI Guid Partition Table Format Definition.\r
3\r
9df063a0 4Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>\r
af2dc6a7 5This program and the accompanying materials are licensed and made available under \r
6the terms and conditions of the BSD License that accompanies this distribution. \r
7The full text of the license may be found at\r
8http://opensource.org/licenses/bsd-license.php. \r
9 \r
10THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r
11WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
959ccb23 12\r
959ccb23 13**/\r
14\r
15#ifndef __UEFI_GPT_H__\r
16#define __UEFI_GPT_H__\r
17\r
e0c047a0 18///\r
19/// The primary GUID Partition Table Header must be\r
20/// located in LBA 1 (i.e., the second logical block).\r
21///\r
959ccb23 22#define PRIMARY_PART_HEADER_LBA 1\r
8b13229b 23///\r
af2dc6a7 24/// EFI Partition Table Signature: "EFI PART".\r
8b13229b 25/// \r
f6d2bcc6 26#define EFI_PTAB_HEADER_ID SIGNATURE_64 ('E','F','I',' ','P','A','R','T')\r
959ccb23 27\r
28#pragma pack(1)\r
8b13229b 29\r
30///\r
af2dc6a7 31/// GPT Partition Table Header.\r
8b13229b 32///\r
959ccb23 33typedef struct {\r
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34 ///\r
35 /// The table header for the GPT partition Table.\r
af2dc6a7 36 /// This header contains EFI_PTAB_HEADER_ID.\r
1bf79370 37 ///\r
959ccb23 38 EFI_TABLE_HEADER Header;\r
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39 ///\r
40 /// The LBA that contains this data structure.\r
41 ///\r
959ccb23 42 EFI_LBA MyLBA;\r
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43 ///\r
44 /// LBA address of the alternate GUID Partition Table Header.\r
45 ///\r
959ccb23 46 EFI_LBA AlternateLBA;\r
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47 ///\r
48 /// The first usable logical block that may be used\r
49 /// by a partition described by a GUID Partition Entry.\r
50 ///\r
959ccb23 51 EFI_LBA FirstUsableLBA;\r
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52 ///\r
53 /// The last usable logical block that may be used\r
54 /// by a partition described by a GUID Partition Entry.\r
55 ///\r
959ccb23 56 EFI_LBA LastUsableLBA;\r
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57 ///\r
58 /// GUID that can be used to uniquely identify the disk.\r
59 ///\r
959ccb23 60 EFI_GUID DiskGUID;\r
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61 ///\r
62 /// The starting LBA of the GUID Partition Entry array.\r
63 ///\r
959ccb23 64 EFI_LBA PartitionEntryLBA;\r
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65 ///\r
66 /// The number of Partition Entries in the GUID Partition Entry array.\r
67 ///\r
959ccb23 68 UINT32 NumberOfPartitionEntries;\r
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69 ///\r
70 /// The size, in bytes, of each the GUID Partition\r
71 /// Entry structures in the GUID Partition Entry\r
72 /// array. Must be a multiple of 8.\r
73 ///\r
959ccb23 74 UINT32 SizeOfPartitionEntry;\r
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75 ///\r
76 /// The CRC32 of the GUID Partition Entry array.\r
77 /// Starts at PartitionEntryLBA and is\r
78 /// computed over a byte length of\r
79 /// NumberOfPartitionEntries * SizeOfPartitionEntry.\r
80 ///\r
959ccb23 81 UINT32 PartitionEntryArrayCRC32;\r
82} EFI_PARTITION_TABLE_HEADER;\r
83\r
8b13229b 84///\r
af2dc6a7 85/// GPT Partition Entry.\r
8b13229b 86///\r
959ccb23 87typedef struct {\r
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88 ///\r
89 /// Unique ID that defines the purpose and type of this Partition. A value of\r
90 /// zero defines that this partition entry is not being used.\r
91 ///\r
959ccb23 92 EFI_GUID PartitionTypeGUID;\r
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93 ///\r
94 /// GUID that is unique for every partition entry. Every partition ever\r
95 /// created will have a unique GUID.\r
96 /// This GUID must be assigned when the GUID Partition Entry is created.\r
97 ///\r
959ccb23 98 EFI_GUID UniquePartitionGUID;\r
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99 ///\r
100 /// Starting LBA of the partition defined by this entry\r
101 ///\r
959ccb23 102 EFI_LBA StartingLBA;\r
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103 ///\r
104 /// Ending LBA of the partition defined by this entry.\r
105 ///\r
959ccb23 106 EFI_LBA EndingLBA;\r
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107 ///\r
108 /// Attribute bits, all bits reserved by UEFI\r
41c333aa 109 /// Bit 0: If this bit is set, the partition is required for the platform to function. The owner/creator of the\r
110 /// partition indicates that deletion or modification of the contents can result in loss of platform\r
111 /// features or failure for the platform to boot or operate. The system cannot function normally if\r
112 /// this partition is removed, and it should be considered part of the hardware of the system.\r
af2dc6a7 113 /// Actions such as running diagnostics, system recovery, or even OS install or boot, could\r
41c333aa 114 /// potentially stop working if this partition is removed. Unless OS software or firmware\r
115 /// recognizes this partition, it should never be removed or modified as the UEFI firmware or\r
116 /// platform hardware may become non-functional.\r
117 /// Bit 1: If this bit is set firmware must not produce an EFI_BLOCK_IO_PROTOCOL device for\r
118 /// this partition. By not producing EFI_BLOCK_IO_PROTOCOL partition, file system\r
119 /// mappings will not be created for this partition in UEFI.\r
120 /// Bits 2-47: Undefined and must be zero. Reserved for expansion by future versions of the UEFI\r
121 /// specification.\r
122 /// Bits 48-63: Reserved for GUID specific use. The use of these bits will vary depending on the\r
123 /// PartitionTypeGUID. Only the owner of the PartitionTypeGUID is allowed\r
fa3e7746 124 /// to modify these bits. They must be preserved if Bits 0-47 are modified..\r
1bf79370 125 ///\r
959ccb23 126 UINT64 Attributes;\r
1bf79370 127 ///\r
fbf926ad 128 /// Null-terminated name of the partition.\r
1bf79370 129 ///\r
959ccb23 130 CHAR16 PartitionName[36];\r
131} EFI_PARTITION_ENTRY;\r
132\r
959ccb23 133#pragma pack()\r
134#endif\r
135\r
136\r