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 Computer Corporation 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/config.h> 30 #include <linux/fs.h> 31 #include <linux/genhd.h> 32 #include <linux/kernel.h> 33 #include <linux/major.h> 34 #include <linux/string.h> 35 #include <linux/blk.h> 36 #include <linux/efi.h> 37 38 #define MSDOS_MBR_SIGNATURE 0xaa55 39 #define EFI_PMBR_OSTYPE_EFI 0xEF 40 #define EFI_PMBR_OSTYPE_EFI_GPT 0xEE 41 42 #define GPT_BLOCK_SIZE 512 43 #define GPT_HEADER_SIGNATURE 0x5452415020494645ULL 44 #define GPT_HEADER_REVISION_V1 0x00010000 45 #define GPT_PRIMARY_PARTITION_TABLE_LBA 1 46 47 #define PARTITION_SYSTEM_GUID \ 48 EFI_GUID( 0xC12A7328, 0xF81F, 0x11d2, \ 49 0xBA, 0x4B, 0x00, 0xA0, 0xC9, 0x3E, 0xC9, 0x3B) 50 #define LEGACY_MBR_PARTITION_GUID \ 51 EFI_GUID( 0x024DEE41, 0x33E7, 0x11d3, \ 52 0x9D, 0x69, 0x00, 0x08, 0xC7, 0x81, 0xF3, 0x9F) 53 #define PARTITION_MSFT_RESERVED_GUID \ 54 EFI_GUID( 0xE3C9E316, 0x0B5C, 0x4DB8, \ 55 0x81, 0x7D, 0xF9, 0x2D, 0xF0, 0x02, 0x15, 0xAE) 56 #define PARTITION_BASIC_DATA_GUID \ 57 EFI_GUID( 0xEBD0A0A2, 0xB9E5, 0x4433, \ 58 0x87, 0xC0, 0x68, 0xB6, 0xB7, 0x26, 0x99, 0xC7) 59 #define PARTITION_LINUX_RAID_GUID \ 60 EFI_GUID( 0xa19d880f, 0x05fc, 0x4d3b, \ 61 0xa0, 0x06, 0x74, 0x3f, 0x0f, 0x84, 0x91, 0x1e) 62 #define PARTITION_LINUX_SWAP_GUID \ 63 EFI_GUID( 0x0657fd6d, 0xa4ab, 0x43c4, \ 64 0x84, 0xe5, 0x09, 0x33, 0xc8, 0x4b, 0x4f, 0x4f) 65 #define PARTITION_LINUX_LVM_GUID \ 66 EFI_GUID( 0xe6d6d379, 0xf507, 0x44c2, \ 67 0xa2, 0x3c, 0x23, 0x8f, 0x2a, 0x3d, 0xf9, 0x28) 68 69 typedef struct _gpt_header { 70 u64 signature; 71 u32 revision; 72 u32 header_size; 73 u32 header_crc32; 74 u32 reserved1; 75 u64 my_lba; 76 u64 alternate_lba; 77 u64 first_usable_lba; 78 u64 last_usable_lba; 79 efi_guid_t disk_guid; 80 u64 partition_entry_lba; 81 u32 num_partition_entries; 82 u32 sizeof_partition_entry; 83 u32 partition_entry_array_crc32; 84 u8 reserved2[GPT_BLOCK_SIZE - 92]; 85 } __attribute__ ((packed)) gpt_header; 86 87 typedef struct _gpt_entry_attributes { 88 u64 required_to_function:1; 89 u64 reserved:47; 90 u64 type_guid_specific:16; 91 } __attribute__ ((packed)) gpt_entry_attributes; 92 93 typedef struct _gpt_entry { 94 efi_guid_t partition_type_guid; 95 efi_guid_t unique_partition_guid; 96 u64 starting_lba; 97 u64 ending_lba; 98 gpt_entry_attributes attributes; 99 efi_char16_t partition_name[72 / sizeof (efi_char16_t)]; 100 } __attribute__ ((packed)) gpt_entry; 101 102 typedef struct _legacy_mbr { 103 u8 boot_code[440]; 104 u32 unique_mbr_signature; 105 u16 unknown; 106 struct partition partition_record[4]; 107 u16 signature; 108 } __attribute__ ((packed)) legacy_mbr; 109 110 /* Functions */ 111 extern int 112 efi_partition(struct gendisk *hd, struct block_device *bdev, 113 unsigned long first_sector, int first_part_minor); 114 115 #endif 116