1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /************************************************************
3 * EFI GUID Partition Table
4 * Per Intel EFI Specification v1.02
5 * http://developer.intel.com/technology/efi/efi.htm
6 *
7 * By Matt Domsch <Matt_Domsch@dell.com> Fri Sep 22 22:15:56 CDT 2000
8 * Copyright 2000,2001 Dell Inc.
9 ************************************************************/
10
11 #ifndef FS_PART_EFI_H_INCLUDED
12 #define FS_PART_EFI_H_INCLUDED
13
14 #include <linux/types.h>
15 #include <linux/fs.h>
16 #include <linux/kernel.h>
17 #include <linux/major.h>
18 #include <linux/string.h>
19 #include <linux/efi.h>
20 #include <linux/compiler.h>
21
22 #define MSDOS_MBR_SIGNATURE 0xaa55
23 #define EFI_PMBR_OSTYPE_EFI 0xEF
24 #define EFI_PMBR_OSTYPE_EFI_GPT 0xEE
25
26 #define GPT_MBR_PROTECTIVE 1
27 #define GPT_MBR_HYBRID 2
28
29 #define GPT_HEADER_SIGNATURE 0x5452415020494645ULL
30 #define GPT_HEADER_REVISION_V1 0x00010000
31 #define GPT_PRIMARY_PARTITION_TABLE_LBA 1
32
33 #define PARTITION_SYSTEM_GUID \
34 EFI_GUID( 0xC12A7328, 0xF81F, 0x11d2, \
35 0xBA, 0x4B, 0x00, 0xA0, 0xC9, 0x3E, 0xC9, 0x3B)
36 #define LEGACY_MBR_PARTITION_GUID \
37 EFI_GUID( 0x024DEE41, 0x33E7, 0x11d3, \
38 0x9D, 0x69, 0x00, 0x08, 0xC7, 0x81, 0xF3, 0x9F)
39 #define PARTITION_MSFT_RESERVED_GUID \
40 EFI_GUID( 0xE3C9E316, 0x0B5C, 0x4DB8, \
41 0x81, 0x7D, 0xF9, 0x2D, 0xF0, 0x02, 0x15, 0xAE)
42 #define PARTITION_BASIC_DATA_GUID \
43 EFI_GUID( 0xEBD0A0A2, 0xB9E5, 0x4433, \
44 0x87, 0xC0, 0x68, 0xB6, 0xB7, 0x26, 0x99, 0xC7)
45 #define PARTITION_LINUX_RAID_GUID \
46 EFI_GUID( 0xa19d880f, 0x05fc, 0x4d3b, \
47 0xa0, 0x06, 0x74, 0x3f, 0x0f, 0x84, 0x91, 0x1e)
48 #define PARTITION_LINUX_SWAP_GUID \
49 EFI_GUID( 0x0657fd6d, 0xa4ab, 0x43c4, \
50 0x84, 0xe5, 0x09, 0x33, 0xc8, 0x4b, 0x4f, 0x4f)
51 #define PARTITION_LINUX_LVM_GUID \
52 EFI_GUID( 0xe6d6d379, 0xf507, 0x44c2, \
53 0xa2, 0x3c, 0x23, 0x8f, 0x2a, 0x3d, 0xf9, 0x28)
54
55 typedef struct _gpt_header {
56 __le64 signature;
57 __le32 revision;
58 __le32 header_size;
59 __le32 header_crc32;
60 __le32 reserved1;
61 __le64 my_lba;
62 __le64 alternate_lba;
63 __le64 first_usable_lba;
64 __le64 last_usable_lba;
65 efi_guid_t disk_guid;
66 __le64 partition_entry_lba;
67 __le32 num_partition_entries;
68 __le32 sizeof_partition_entry;
69 __le32 partition_entry_array_crc32;
70
71 /* The rest of the logical block is reserved by UEFI and must be zero.
72 * EFI standard handles this by:
73 *
74 * uint8_t reserved2[ BlockSize - 92 ];
75 */
76 } __packed gpt_header;
77
78 typedef struct _gpt_entry_attributes {
79 u64 required_to_function:1;
80 u64 reserved:47;
81 u64 type_guid_specific:16;
82 } __packed gpt_entry_attributes;
83
84 typedef struct _gpt_entry {
85 efi_guid_t partition_type_guid;
86 efi_guid_t unique_partition_guid;
87 __le64 starting_lba;
88 __le64 ending_lba;
89 gpt_entry_attributes attributes;
90 __le16 partition_name[72/sizeof(__le16)];
91 } __packed gpt_entry;
92
93 typedef struct _gpt_mbr_record {
94 u8 boot_indicator; /* unused by EFI, set to 0x80 for bootable */
95 u8 start_head; /* unused by EFI, pt start in CHS */
96 u8 start_sector; /* unused by EFI, pt start in CHS */
97 u8 start_track;
98 u8 os_type; /* EFI and legacy non-EFI OS types */
99 u8 end_head; /* unused by EFI, pt end in CHS */
100 u8 end_sector; /* unused by EFI, pt end in CHS */
101 u8 end_track; /* unused by EFI, pt end in CHS */
102 __le32 starting_lba; /* used by EFI - start addr of the on disk pt */
103 __le32 size_in_lba; /* used by EFI - size of pt in LBA */
104 } __packed gpt_mbr_record;
105
106
107 typedef struct _legacy_mbr {
108 u8 boot_code[440];
109 __le32 unique_mbr_signature;
110 __le16 unknown;
111 gpt_mbr_record partition_record[4];
112 __le16 signature;
113 } __packed legacy_mbr;
114
115 #endif
116
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