1 /* 2 * Copyright (C) 2008 RuggedCom, Inc. 3 * Richard Retanubun <RichardRetanubun@RuggedCom.com> 4 * 5 * See file CREDITS for list of people who contributed to this 6 * project. 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License as 10 * published by the Free Software Foundation; either version 2 of 11 * the License, or (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21 * MA 02111-1307 USA 22 */ 23 24 /* 25 * See also linux/fs/partitions/efi.h 26 * 27 * EFI GUID Partition Table 28 * Per Intel EFI Specification v1.02 29 * http://developer.intel.com/technology/efi/efi.htm 30 */ 31 32 #include <linux/compiler.h> 33 34 #ifndef _DISK_PART_EFI_H 35 #define _DISK_PART_EFI_H 36 37 #define MSDOS_MBR_SIGNATURE 0xAA55 38 #define EFI_PMBR_OSTYPE_EFI 0xEF 39 #define EFI_PMBR_OSTYPE_EFI_GPT 0xEE 40 41 #define GPT_HEADER_SIGNATURE 0x5452415020494645ULL 42 #define GPT_HEADER_REVISION_V1 0x00010000 43 #define GPT_PRIMARY_PARTITION_TABLE_LBA 1ULL 44 #define GPT_ENTRY_NAME "gpt" 45 #define GPT_ENTRY_NUMBERS 128 46 #define GPT_ENTRY_SIZE 128 47 48 #define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \ 49 ((efi_guid_t) \ 50 {{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \ 51 (b) & 0xff, ((b) >> 8) & 0xff, \ 52 (c) & 0xff, ((c) >> 8) & 0xff, \ 53 (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }}) 54 55 #define PARTITION_SYSTEM_GUID \ 56 EFI_GUID( 0xC12A7328, 0xF81F, 0x11d2, \ 57 0xBA, 0x4B, 0x00, 0xA0, 0xC9, 0x3E, 0xC9, 0x3B) 58 #define LEGACY_MBR_PARTITION_GUID \ 59 EFI_GUID( 0x024DEE41, 0x33E7, 0x11d3, \ 60 0x9D, 0x69, 0x00, 0x08, 0xC7, 0x81, 0xF3, 0x9F) 61 #define PARTITION_MSFT_RESERVED_GUID \ 62 EFI_GUID( 0xE3C9E316, 0x0B5C, 0x4DB8, \ 63 0x81, 0x7D, 0xF9, 0x2D, 0xF0, 0x02, 0x15, 0xAE) 64 #define PARTITION_BASIC_DATA_GUID \ 65 EFI_GUID( 0xEBD0A0A2, 0xB9E5, 0x4433, \ 66 0x87, 0xC0, 0x68, 0xB6, 0xB7, 0x26, 0x99, 0xC7) 67 #define PARTITION_LINUX_RAID_GUID \ 68 EFI_GUID( 0xa19d880f, 0x05fc, 0x4d3b, \ 69 0xa0, 0x06, 0x74, 0x3f, 0x0f, 0x84, 0x91, 0x1e) 70 #define PARTITION_LINUX_SWAP_GUID \ 71 EFI_GUID( 0x0657fd6d, 0xa4ab, 0x43c4, \ 72 0x84, 0xe5, 0x09, 0x33, 0xc8, 0x4b, 0x4f, 0x4f) 73 #define PARTITION_LINUX_LVM_GUID \ 74 EFI_GUID( 0xe6d6d379, 0xf507, 0x44c2, \ 75 0xa2, 0x3c, 0x23, 0x8f, 0x2a, 0x3d, 0xf9, 0x28) 76 77 /* linux/include/efi.h */ 78 typedef u16 efi_char16_t; 79 80 typedef struct { 81 u8 b[16]; 82 } efi_guid_t; 83 84 /* based on linux/include/genhd.h */ 85 struct partition { 86 u8 boot_ind; /* 0x80 - active */ 87 u8 head; /* starting head */ 88 u8 sector; /* starting sector */ 89 u8 cyl; /* starting cylinder */ 90 u8 sys_ind; /* What partition type */ 91 u8 end_head; /* end head */ 92 u8 end_sector; /* end sector */ 93 u8 end_cyl; /* end cylinder */ 94 __le32 start_sect; /* starting sector counting from 0 */ 95 __le32 nr_sects; /* nr of sectors in partition */ 96 } __packed; 97 98 /* based on linux/fs/partitions/efi.h */ 99 typedef struct _gpt_header { 100 __le64 signature; 101 __le32 revision; 102 __le32 header_size; 103 __le32 header_crc32; 104 __le32 reserved1; 105 __le64 my_lba; 106 __le64 alternate_lba; 107 __le64 first_usable_lba; 108 __le64 last_usable_lba; 109 efi_guid_t disk_guid; 110 __le64 partition_entry_lba; 111 __le32 num_partition_entries; 112 __le32 sizeof_partition_entry; 113 __le32 partition_entry_array_crc32; 114 } __packed gpt_header; 115 116 typedef union _gpt_entry_attributes { 117 struct { 118 u64 required_to_function:1; 119 u64 no_block_io_protocol:1; 120 u64 legacy_bios_bootable:1; 121 u64 reserved:45; 122 u64 type_guid_specific:16; 123 } fields; 124 unsigned long long raw; 125 } __packed gpt_entry_attributes; 126 127 #define PARTNAME_SZ (72 / sizeof(efi_char16_t)) 128 typedef struct _gpt_entry { 129 efi_guid_t partition_type_guid; 130 efi_guid_t unique_partition_guid; 131 __le64 starting_lba; 132 __le64 ending_lba; 133 gpt_entry_attributes attributes; 134 efi_char16_t partition_name[PARTNAME_SZ]; 135 } __packed gpt_entry; 136 137 typedef struct _legacy_mbr { 138 u8 boot_code[440]; 139 __le32 unique_mbr_signature; 140 __le16 unknown; 141 struct partition partition_record[4]; 142 __le16 signature; 143 } __packed legacy_mbr; 144 145 #endif /* _DISK_PART_EFI_H */ 146