1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * Copyright (C) 2008 RuggedCom, Inc. 4 * Richard Retanubun <RichardRetanubun@RuggedCom.com> 5 */ 6 7 /* 8 * See also linux/fs/partitions/efi.h 9 * 10 * EFI GUID Partition Table 11 * Per Intel EFI Specification v1.02 12 * http://developer.intel.com/technology/efi/efi.htm 13 */ 14 15 #include <linux/compiler.h> 16 17 #ifndef _DISK_PART_EFI_H 18 #define _DISK_PART_EFI_H 19 20 #include <efi.h> 21 22 #define MSDOS_MBR_SIGNATURE 0xAA55 23 #define MSDOS_MBR_BOOT_CODE_SIZE 440 24 #define EFI_PMBR_OSTYPE_EFI 0xEF 25 #define EFI_PMBR_OSTYPE_EFI_GPT 0xEE 26 27 #define GPT_HEADER_SIGNATURE_UBOOT 0x5452415020494645ULL // 'EFI PART' 28 #define GPT_HEADER_CHROMEOS_IGNORE 0x454d45524f4e4749ULL // 'IGNOREME' 29 30 #define GPT_HEADER_REVISION_V1 0x00010000 31 #define GPT_PRIMARY_PARTITION_TABLE_LBA 1ULL 32 #define GPT_ENTRY_NUMBERS CONFIG_EFI_PARTITION_ENTRIES_NUMBERS 33 #define GPT_ENTRY_SIZE 128 34 35 #define PARTITION_SYSTEM_GUID \ 36 EFI_GUID( 0xC12A7328, 0xF81F, 0x11d2, \ 37 0xBA, 0x4B, 0x00, 0xA0, 0xC9, 0x3E, 0xC9, 0x3B) 38 #define LEGACY_MBR_PARTITION_GUID \ 39 EFI_GUID( 0x024DEE41, 0x33E7, 0x11d3, \ 40 0x9D, 0x69, 0x00, 0x08, 0xC7, 0x81, 0xF3, 0x9F) 41 #define PARTITION_MSFT_RESERVED_GUID \ 42 EFI_GUID( 0xE3C9E316, 0x0B5C, 0x4DB8, \ 43 0x81, 0x7D, 0xF9, 0x2D, 0xF0, 0x02, 0x15, 0xAE) 44 #define PARTITION_BASIC_DATA_GUID \ 45 EFI_GUID( 0xEBD0A0A2, 0xB9E5, 0x4433, \ 46 0x87, 0xC0, 0x68, 0xB6, 0xB7, 0x26, 0x99, 0xC7) 47 #define PARTITION_LINUX_FILE_SYSTEM_DATA_GUID \ 48 EFI_GUID(0x0FC63DAF, 0x8483, 0x4772, \ 49 0x8E, 0x79, 0x3D, 0x69, 0xD8, 0x47, 0x7D, 0xE4) 50 #define PARTITION_LINUX_RAID_GUID \ 51 EFI_GUID( 0xa19d880f, 0x05fc, 0x4d3b, \ 52 0xa0, 0x06, 0x74, 0x3f, 0x0f, 0x84, 0x91, 0x1e) 53 #define PARTITION_LINUX_SWAP_GUID \ 54 EFI_GUID( 0x0657fd6d, 0xa4ab, 0x43c4, \ 55 0x84, 0xe5, 0x09, 0x33, 0xc8, 0x4b, 0x4f, 0x4f) 56 #define PARTITION_LINUX_LVM_GUID \ 57 EFI_GUID( 0xe6d6d379, 0xf507, 0x44c2, \ 58 0xa2, 0x3c, 0x23, 0x8f, 0x2a, 0x3d, 0xf9, 0x28) 59 #define PARTITION_U_BOOT_ENVIRONMENT \ 60 EFI_GUID( 0x3de21764, 0x95bd, 0x54bd, \ 61 0xa5, 0xc3, 0x4a, 0xbe, 0x78, 0x6f, 0x38, 0xa8) 62 63 /* Special ChromiumOS things */ 64 #define PARTITION_CROS_KERNEL \ 65 EFI_GUID(0xfe3a2a5d, 0x4f32, 0x41a7, \ 66 0xb7, 0x25, 0xac, 0xcc, 0x32, 0x85, 0xa3, 0x09) 67 #define PARTITION_CROS_ROOT \ 68 EFI_GUID(0x3cb8e202, 0x3b7e, 0x47dd, \ 69 0x8a, 0x3c, 0x7f, 0xf2, 0xa1, 0x3c, 0xfc, 0xec) 70 #define PARTITION_CROS_FIRMWARE \ 71 EFI_GUID(0xcab6e88e, 0xabf3, 0x4102, \ 72 0xa0, 0x7a, 0xd4, 0xbb, 0x9b, 0xe3, 0xc1, 0xd3) 73 #define PARTITION_CROS_RESERVED \ 74 EFI_GUID(0x2e0a753d, 0x9e48, 0x43b0, \ 75 0x83, 0x37, 0xb1, 0x51, 0x92, 0xcb, 0x1b, 0x5e) 76 77 /* linux/include/efi.h */ 78 typedef u16 efi_char16_t; 79 80 /* based on linux/include/genhd.h */ 81 struct partition { 82 u8 boot_ind; /* 0x80 - active */ 83 u8 head; /* starting head */ 84 u8 sector; /* starting sector */ 85 u8 cyl; /* starting cylinder */ 86 u8 sys_ind; /* What partition type */ 87 u8 end_head; /* end head */ 88 u8 end_sector; /* end sector */ 89 u8 end_cyl; /* end cylinder */ 90 __le32 start_sect; /* starting sector counting from 0 */ 91 __le32 nr_sects; /* nr of sectors in partition */ 92 } __packed; 93 94 /* based on linux/fs/partitions/efi.h */ 95 typedef struct _gpt_header { 96 __le64 signature; 97 __le32 revision; 98 __le32 header_size; 99 __le32 header_crc32; 100 __le32 reserved1; 101 __le64 my_lba; 102 __le64 alternate_lba; 103 __le64 first_usable_lba; 104 __le64 last_usable_lba; 105 efi_guid_t disk_guid; 106 __le64 partition_entry_lba; 107 __le32 num_partition_entries; 108 __le32 sizeof_partition_entry; 109 __le32 partition_entry_array_crc32; 110 } __packed gpt_header; 111 112 typedef union _gpt_entry_attributes { 113 struct { 114 u64 required_to_function:1; 115 u64 no_block_io_protocol:1; 116 u64 legacy_bios_bootable:1; 117 u64 reserved:45; 118 u64 type_guid_specific:16; 119 } fields; 120 unsigned long long raw; 121 } __packed gpt_entry_attributes; 122 123 #define PARTNAME_SZ (72 / sizeof(efi_char16_t)) 124 typedef struct _gpt_entry { 125 efi_guid_t partition_type_guid; 126 efi_guid_t unique_partition_guid; 127 __le64 starting_lba; 128 __le64 ending_lba; 129 gpt_entry_attributes attributes; 130 efi_char16_t partition_name[PARTNAME_SZ]; 131 } __packed gpt_entry; 132 133 typedef struct _legacy_mbr { 134 u8 boot_code[MSDOS_MBR_BOOT_CODE_SIZE]; 135 __le32 unique_mbr_signature; 136 __le16 unknown; 137 struct partition partition_record[4]; 138 __le16 signature; 139 } __packed legacy_mbr; 140 141 #define EFI_PARTITION_INFO_PROTOCOL_GUID \ 142 EFI_GUID(0x8cf2f62c, 0xbc9b, 0x4821, 0x80, \ 143 0x8d, 0xec, 0x9e, 0xc4, 0x21, 0xa1, 0xa0) 144 145 #define EFI_PARTITION_INFO_PROTOCOL_REVISION 0x0001000 146 #define PARTITION_TYPE_OTHER 0x00 147 #define PARTITION_TYPE_MBR 0x01 148 #define PARTITION_TYPE_GPT 0x02 149 150 struct efi_partition_info { 151 u32 revision; 152 u32 type; 153 u8 system; 154 u8 reserved[7]; 155 union { 156 struct partition mbr; 157 gpt_entry gpt; 158 } info; 159 } __packed; 160 161 #endif /* _DISK_PART_EFI_H */ 162