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_NAME "gpt" 31 #define GPT_ENTRY_NUMBERS 128 32 #define GPT_ENTRY_SIZE 128 33 34 #define PARTITION_SYSTEM_GUID \ 35 EFI_GUID( 0xC12A7328, 0xF81F, 0x11d2, \ 36 0xBA, 0x4B, 0x00, 0xA0, 0xC9, 0x3E, 0xC9, 0x3B) 37 #define LEGACY_MBR_PARTITION_GUID \ 38 EFI_GUID( 0x024DEE41, 0x33E7, 0x11d3, \ 39 0x9D, 0x69, 0x00, 0x08, 0xC7, 0x81, 0xF3, 0x9F) 40 #define PARTITION_MSFT_RESERVED_GUID \ 41 EFI_GUID( 0xE3C9E316, 0x0B5C, 0x4DB8, \ 42 0x81, 0x7D, 0xF9, 0x2D, 0xF0, 0x02, 0x15, 0xAE) 43 #define PARTITION_BASIC_DATA_GUID \ 44 EFI_GUID( 0xEBD0A0A2, 0xB9E5, 0x4433, \ 45 0x87, 0xC0, 0x68, 0xB6, 0xB7, 0x26, 0x99, 0xC7) 46 #define PARTITION_LINUX_RAID_GUID \ 47 EFI_GUID( 0xa19d880f, 0x05fc, 0x4d3b, \ 48 0xa0, 0x06, 0x74, 0x3f, 0x0f, 0x84, 0x91, 0x1e) 49 #define PARTITION_LINUX_SWAP_GUID \ 50 EFI_GUID( 0x0657fd6d, 0xa4ab, 0x43c4, \ 51 0x84, 0xe5, 0x09, 0x33, 0xc8, 0x4b, 0x4f, 0x4f) 52 #define PARTITION_LINUX_LVM_GUID \ 53 EFI_GUID( 0xe6d6d379, 0xf507, 0x44c2, \ 54 0xa2, 0x3c, 0x23, 0x8f, 0x2a, 0x3d, 0xf9, 0x28) 55 56 /* linux/include/efi.h */ 57 typedef u16 efi_char16_t; 58 59 typedef struct { 60 u8 b[16]; 61 } efi_guid_t; 62 63 /* based on linux/include/genhd.h */ 64 struct partition { 65 u8 boot_ind; /* 0x80 - active */ 66 u8 head; /* starting head */ 67 u8 sector; /* starting sector */ 68 u8 cyl; /* starting cylinder */ 69 u8 sys_ind; /* What partition type */ 70 u8 end_head; /* end head */ 71 u8 end_sector; /* end sector */ 72 u8 end_cyl; /* end cylinder */ 73 __le32 start_sect; /* starting sector counting from 0 */ 74 __le32 nr_sects; /* nr of sectors in partition */ 75 } __packed; 76 77 /* based on linux/fs/partitions/efi.h */ 78 typedef struct _gpt_header { 79 __le64 signature; 80 __le32 revision; 81 __le32 header_size; 82 __le32 header_crc32; 83 __le32 reserved1; 84 __le64 my_lba; 85 __le64 alternate_lba; 86 __le64 first_usable_lba; 87 __le64 last_usable_lba; 88 efi_guid_t disk_guid; 89 __le64 partition_entry_lba; 90 __le32 num_partition_entries; 91 __le32 sizeof_partition_entry; 92 __le32 partition_entry_array_crc32; 93 } __packed gpt_header; 94 95 typedef union _gpt_entry_attributes { 96 struct { 97 u64 required_to_function:1; 98 u64 no_block_io_protocol:1; 99 u64 legacy_bios_bootable:1; 100 u64 reserved:45; 101 u64 type_guid_specific:16; 102 } fields; 103 unsigned long long raw; 104 } __packed gpt_entry_attributes; 105 106 #define PARTNAME_SZ (72 / sizeof(efi_char16_t)) 107 typedef struct _gpt_entry { 108 efi_guid_t partition_type_guid; 109 efi_guid_t unique_partition_guid; 110 __le64 starting_lba; 111 __le64 ending_lba; 112 gpt_entry_attributes attributes; 113 efi_char16_t partition_name[PARTNAME_SZ]; 114 } __packed gpt_entry; 115 116 typedef struct _legacy_mbr { 117 u8 boot_code[440]; 118 __le32 unique_mbr_signature; 119 __le16 unknown; 120 struct partition partition_record[4]; 121 __le16 signature; 122 } __packed legacy_mbr; 123 124 #endif /* _DISK_PART_EFI_H */ 125