1 /* 2 * Copyright (C) 2008 RuggedCom, Inc. 3 * Richard Retanubun <RichardRetanubun@RuggedCom.com> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 /* 9 * See also linux/fs/partitions/efi.h 10 * 11 * EFI GUID Partition Table 12 * Per Intel EFI Specification v1.02 13 * http://developer.intel.com/technology/efi/efi.htm 14 */ 15 16 #include <linux/compiler.h> 17 18 #ifndef _DISK_PART_EFI_H 19 #define _DISK_PART_EFI_H 20 21 #include <efi.h> 22 23 #define MSDOS_MBR_SIGNATURE 0xAA55 24 #define EFI_PMBR_OSTYPE_EFI 0xEF 25 #define EFI_PMBR_OSTYPE_EFI_GPT 0xEE 26 27 #define GPT_HEADER_SIGNATURE 0x5452415020494645ULL 28 #define GPT_HEADER_REVISION_V1 0x00010000 29 #define GPT_PRIMARY_PARTITION_TABLE_LBA 1ULL 30 #define GPT_ENTRY_NUMBERS 128 31 #define GPT_ENTRY_SIZE 128 32 33 #define PARTITION_SYSTEM_GUID \ 34 EFI_GUID( 0xC12A7328, 0xF81F, 0x11d2, \ 35 0xBA, 0x4B, 0x00, 0xA0, 0xC9, 0x3E, 0xC9, 0x3B) 36 #define LEGACY_MBR_PARTITION_GUID \ 37 EFI_GUID( 0x024DEE41, 0x33E7, 0x11d3, \ 38 0x9D, 0x69, 0x00, 0x08, 0xC7, 0x81, 0xF3, 0x9F) 39 #define PARTITION_MSFT_RESERVED_GUID \ 40 EFI_GUID( 0xE3C9E316, 0x0B5C, 0x4DB8, \ 41 0x81, 0x7D, 0xF9, 0x2D, 0xF0, 0x02, 0x15, 0xAE) 42 #define PARTITION_BASIC_DATA_GUID \ 43 EFI_GUID( 0xEBD0A0A2, 0xB9E5, 0x4433, \ 44 0x87, 0xC0, 0x68, 0xB6, 0xB7, 0x26, 0x99, 0xC7) 45 #define PARTITION_LINUX_FILE_SYSTEM_DATA_GUID \ 46 EFI_GUID(0x0FC63DAF, 0x8483, 0x4772, \ 47 0x8E, 0x79, 0x3D, 0x69, 0xD8, 0x47, 0x7D, 0xE4) 48 #define PARTITION_LINUX_RAID_GUID \ 49 EFI_GUID( 0xa19d880f, 0x05fc, 0x4d3b, \ 50 0xa0, 0x06, 0x74, 0x3f, 0x0f, 0x84, 0x91, 0x1e) 51 #define PARTITION_LINUX_SWAP_GUID \ 52 EFI_GUID( 0x0657fd6d, 0xa4ab, 0x43c4, \ 53 0x84, 0xe5, 0x09, 0x33, 0xc8, 0x4b, 0x4f, 0x4f) 54 #define PARTITION_LINUX_LVM_GUID \ 55 EFI_GUID( 0xe6d6d379, 0xf507, 0x44c2, \ 56 0xa2, 0x3c, 0x23, 0x8f, 0x2a, 0x3d, 0xf9, 0x28) 57 58 /* linux/include/efi.h */ 59 typedef u16 efi_char16_t; 60 61 /* based on linux/include/genhd.h */ 62 struct partition { 63 u8 boot_ind; /* 0x80 - active */ 64 u8 head; /* starting head */ 65 u8 sector; /* starting sector */ 66 u8 cyl; /* starting cylinder */ 67 u8 sys_ind; /* What partition type */ 68 u8 end_head; /* end head */ 69 u8 end_sector; /* end sector */ 70 u8 end_cyl; /* end cylinder */ 71 __le32 start_sect; /* starting sector counting from 0 */ 72 __le32 nr_sects; /* nr of sectors in partition */ 73 } __packed; 74 75 /* based on linux/fs/partitions/efi.h */ 76 typedef struct _gpt_header { 77 __le64 signature; 78 __le32 revision; 79 __le32 header_size; 80 __le32 header_crc32; 81 __le32 reserved1; 82 __le64 my_lba; 83 __le64 alternate_lba; 84 __le64 first_usable_lba; 85 __le64 last_usable_lba; 86 efi_guid_t disk_guid; 87 __le64 partition_entry_lba; 88 __le32 num_partition_entries; 89 __le32 sizeof_partition_entry; 90 __le32 partition_entry_array_crc32; 91 } __packed gpt_header; 92 93 typedef union _gpt_entry_attributes { 94 struct { 95 u64 required_to_function:1; 96 u64 no_block_io_protocol:1; 97 u64 legacy_bios_bootable:1; 98 u64 reserved:45; 99 u64 type_guid_specific:16; 100 } fields; 101 unsigned long long raw; 102 } __packed gpt_entry_attributes; 103 104 #define PARTNAME_SZ (72 / sizeof(efi_char16_t)) 105 typedef struct _gpt_entry { 106 efi_guid_t partition_type_guid; 107 efi_guid_t unique_partition_guid; 108 __le64 starting_lba; 109 __le64 ending_lba; 110 gpt_entry_attributes attributes; 111 efi_char16_t partition_name[PARTNAME_SZ]; 112 } __packed gpt_entry; 113 114 typedef struct _legacy_mbr { 115 u8 boot_code[440]; 116 __le32 unique_mbr_signature; 117 __le16 unknown; 118 struct partition partition_record[4]; 119 __le16 signature; 120 } __packed legacy_mbr; 121 122 #endif /* _DISK_PART_EFI_H */ 123