1 /************************************************************
2 * EFI GUID Partition Table
3 * Per Intel EFI Specification v1.02
4 * http://developer.intel.com/technology/efi/efi.htm
6 * By Matt Domsch <Matt_Domsch@dell.com> Fri Sep 22 22:15:56 CDT 2000
7 * Copyright 2000,2001 Dell Inc.
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.
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.
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
23 ************************************************************/
25 #ifndef FS_PART_EFI_H_INCLUDED
26 #define FS_PART_EFI_H_INCLUDED
28 #include <linux/types.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>
37 #define MSDOS_MBR_SIGNATURE 0xaa55
38 #define EFI_PMBR_OSTYPE_EFI 0xEF
39 #define EFI_PMBR_OSTYPE_EFI_GPT 0xEE
41 #define GPT_MBR_PROTECTIVE 1
42 #define GPT_MBR_HYBRID 2
44 #define GPT_HEADER_SIGNATURE 0x5452415020494645ULL
45 #define GPT_HEADER_REVISION_V1 0x00010000
46 #define GPT_PRIMARY_PARTITION_TABLE_LBA 1
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)
70 typedef struct _gpt_header {
78 __le64 first_usable_lba;
79 __le64 last_usable_lba;
81 __le64 partition_entry_lba;
82 __le32 num_partition_entries;
83 __le32 sizeof_partition_entry;
84 __le32 partition_entry_array_crc32;
86 /* The rest of the logical block is reserved by UEFI and must be zero.
87 * EFI standard handles this by:
89 * uint8_t reserved2[ BlockSize - 92 ];
91 } __packed gpt_header;
93 typedef struct _gpt_entry_attributes {
94 u64 required_to_function:1;
96 u64 type_guid_specific:16;
97 } __packed gpt_entry_attributes;
99 typedef struct _gpt_entry {
100 efi_guid_t partition_type_guid;
101 efi_guid_t unique_partition_guid;
104 gpt_entry_attributes attributes;
105 efi_char16_t partition_name[72 / sizeof (efi_char16_t)];
106 } __packed gpt_entry;
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 */
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;
122 typedef struct _legacy_mbr {
124 __le32 unique_mbr_signature;
126 gpt_mbr_record partition_record[4];
128 } __packed legacy_mbr;
131 extern int efi_partition(struct parsed_partitions *state);