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Diffstat (limited to 'MdePkg/Include/Uefi/UefiGpt.h')
| -rw-r--r-- | MdePkg/Include/Uefi/UefiGpt.h | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/MdePkg/Include/Uefi/UefiGpt.h b/MdePkg/Include/Uefi/UefiGpt.h new file mode 100644 index 000000000000..aa3c9bec0b5c --- /dev/null +++ b/MdePkg/Include/Uefi/UefiGpt.h @@ -0,0 +1,141 @@ +/** @file + EFI Guid Partition Table Format Definition. + +Copyright (c) 2006 - 2011, 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 __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. This field shall be set to a value of 128 x 2^n where n is + /// an integer greater than or equal to zero (e.g., 128, 256, 512, etc.). + /// + 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: If this bit is set, the partition is required for the platform to function. The owner/creator of the + /// partition indicates that deletion or modification of the contents can result in loss of platform + /// features or failure for the platform to boot or operate. The system cannot function normally if + /// this partition is removed, and it should be considered part of the hardware of the system. + /// Actions such as running diagnostics, system recovery, or even OS install or boot, could + /// potentially stop working if this partition is removed. Unless OS software or firmware + /// recognizes this partition, it should never be removed or modified as the UEFI firmware or + /// platform hardware may become non-functional. + /// Bit 1: If this bit is set, then firmware must not produce an EFI_BLOCK_IO_PROTOCOL device for + /// this partition. By not producing an EFI_BLOCK_IO_PROTOCOL partition, file system + /// mappings will not be created for this partition in UEFI. + /// Bit 2: This bit is set aside to let systems with traditional PC-AT BIOS firmware implementations + /// inform certain limited, special-purpose software running on these systems that a GPT + /// partition may be bootable. The UEFI boot manager must ignore this bit when selecting + /// a UEFI-compliant application, e.g., an OS loader. + /// Bits 3-47: Undefined and must be zero. Reserved for expansion by future versions of the UEFI + /// specification. + /// Bits 48-63: Reserved for GUID specific use. The use of these bits will vary depending on the + /// PartitionTypeGUID. Only the owner of the PartitionTypeGUID is allowed + /// to modify these bits. They must be preserved if Bits 0-47 are modified.. + /// + UINT64 Attributes; + /// + /// Null-terminated name of the partition. + /// + CHAR16 PartitionName[36]; +} EFI_PARTITION_ENTRY; + +#pragma pack() +#endif + + |