1 /************************************************************ 2 * EFI GUID Partition Table 3 * Per Intel EFI Specification v1.02 4 * http://developer.intel.com/technology/efi/efi.htm 5 * 6 * By Matt Domsch <Matt_Domsch@dell.com> Fri Sep 22 22:15:56 CDT 2000 7 * Copyright 2000,2001 Dell Inc. 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 22 * 23 ************************************************************/ 24 25 #ifndef FS_PART_EFI_H_INCLUDED 26 #define FS_PART_EFI_H_INCLUDED 27 28 #include <linux/types.h> 29 #include <linux/fs.h> 30 #include <linux/genhd.h> 31 #include <linux/kernel.h> 32 #include <linux/major.h> 33 #include <linux/string.h> 34 #include <linux/efi.h> 35 #include <linux/compiler.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_MBR_PROTECTIVE 1 42 #define GPT_MBR_HYBRID 2 43 44 #define GPT_HEADER_SIGNATURE 0x5452415020494645ULL 45 #define GPT_HEADER_REVISION_V1 0x00010000 46 #define GPT_PRIMARY_PARTITION_TABLE_LBA 1 47 48 #define PARTITION_SYSTEM_GUID \ 49 EFI_GUID( 0xC12A7328, 0xF81F, 0x11d2, \ 50 0xBA, 0x4B, 0x00, 0xA0, 0xC9, 0x3E, 0xC9, 0x3B) 51 #define LEGACY_MBR_PARTITION_GUID \ 52 EFI_GUID( 0x024DEE41, 0x33E7, 0x11d3, \ 53 0x9D, 0x69, 0x00, 0x08, 0xC7, 0x81, 0xF3, 0x9F) 54 #define PARTITION_MSFT_RESERVED_GUID \ 55 EFI_GUID( 0xE3C9E316, 0x0B5C, 0x4DB8, \ 56 0x81, 0x7D, 0xF9, 0x2D, 0xF0, 0x02, 0x15, 0xAE) 57 #define PARTITION_BASIC_DATA_GUID \ 58 EFI_GUID( 0xEBD0A0A2, 0xB9E5, 0x4433, \ 59 0x87, 0xC0, 0x68, 0xB6, 0xB7, 0x26, 0x99, 0xC7) 60 #define PARTITION_LINUX_RAID_GUID \ 61 EFI_GUID( 0xa19d880f, 0x05fc, 0x4d3b, \ 62 0xa0, 0x06, 0x74, 0x3f, 0x0f, 0x84, 0x91, 0x1e) 63 #define PARTITION_LINUX_SWAP_GUID \ 64 EFI_GUID( 0x0657fd6d, 0xa4ab, 0x43c4, \ 65 0x84, 0xe5, 0x09, 0x33, 0xc8, 0x4b, 0x4f, 0x4f) 66 #define PARTITION_LINUX_LVM_GUID \ 67 EFI_GUID( 0xe6d6d379, 0xf507, 0x44c2, \ 68 0xa2, 0x3c, 0x23, 0x8f, 0x2a, 0x3d, 0xf9, 0x28) 69 70 typedef struct _gpt_header { 71 __le64 signature; 72 __le32 revision; 73 __le32 header_size; 74 __le32 header_crc32; 75 __le32 reserved1; 76 __le64 my_lba; 77 __le64 alternate_lba; 78 __le64 first_usable_lba; 79 __le64 last_usable_lba; 80 efi_guid_t disk_guid; 81 __le64 partition_entry_lba; 82 __le32 num_partition_entries; 83 __le32 sizeof_partition_entry; 84 __le32 partition_entry_array_crc32; 85 86 /* The rest of the logical block is reserved by UEFI and must be zero. 87 * EFI standard handles this by: 88 * 89 * uint8_t reserved2[ BlockSize - 92 ]; 90 */ 91 } __packed gpt_header; 92 93 typedef struct _gpt_entry_attributes { 94 u64 required_to_function:1; 95 u64 reserved:47; 96 u64 type_guid_specific:16; 97 } __packed gpt_entry_attributes; 98 99 typedef struct _gpt_entry { 100 efi_guid_t partition_type_guid; 101 efi_guid_t unique_partition_guid; 102 __le64 starting_lba; 103 __le64 ending_lba; 104 gpt_entry_attributes attributes; 105 efi_char16_t partition_name[72 / sizeof (efi_char16_t)]; 106 } __packed gpt_entry; 107 108 typedef struct _gpt_mbr_record { 109 u8 boot_indicator; /* unused by EFI, set to 0x80 for bootable */ 110 u8 start_head; /* unused by EFI, pt start in CHS */ 111 u8 start_sector; /* unused by EFI, pt start in CHS */ 112 u8 start_track; 113 u8 os_type; /* EFI and legacy non-EFI OS types */ 114 u8 end_head; /* unused by EFI, pt end in CHS */ 115 u8 end_sector; /* unused by EFI, pt end in CHS */ 116 u8 end_track; /* unused by EFI, pt end in CHS */ 117 __le32 starting_lba; /* used by EFI - start addr of the on disk pt */ 118 __le32 size_in_lba; /* used by EFI - size of pt in LBA */ 119 } __packed gpt_mbr_record; 120 121 122 typedef struct _legacy_mbr { 123 u8 boot_code[440]; 124 __le32 unique_mbr_signature; 125 __le16 unknown; 126 gpt_mbr_record partition_record[4]; 127 __le16 signature; 128 } __packed legacy_mbr; 129 130 /* Functions */ 131 extern int efi_partition(struct parsed_partitions *state); 132 133 #endif 134