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1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3  * Copyright (C) 2008 RuggedCom, Inc.
4  * Richard Retanubun <RichardRetanubun@RuggedCom.com>
5  */
6 
7 /*
8  * See also linux/fs/partitions/efi.h
9  *
10  * EFI GUID Partition Table
11  * Per Intel EFI Specification v1.02
12  * http://developer.intel.com/technology/efi/efi.htm
13 */
14 
15 #include <linux/compiler.h>
16 
17 #ifndef _DISK_PART_EFI_H
18 #define _DISK_PART_EFI_H
19 
20 #include <efi.h>
21 
22 #define MSDOS_MBR_SIGNATURE 0xAA55
23 #define MSDOS_MBR_BOOT_CODE_SIZE 440
24 #define EFI_PMBR_OSTYPE_EFI 0xEF
25 #define EFI_PMBR_OSTYPE_EFI_GPT 0xEE
26 
27 #define GPT_HEADER_SIGNATURE 0x5452415020494645ULL
28 #define GPT_HEADER_REVISION_V1 0x00010000
29 #define GPT_PRIMARY_PARTITION_TABLE_LBA 1ULL
30 #define GPT_ENTRY_NUMBERS		CONFIG_EFI_PARTITION_ENTRIES_NUMBERS
31 #define GPT_ENTRY_SIZE			128
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_FILE_SYSTEM_DATA_GUID \
46 	EFI_GUID(0x0FC63DAF, 0x8483, 0x4772, \
47 		0x8E, 0x79, 0x3D, 0x69, 0xD8, 0x47, 0x7D, 0xE4)
48 #define PARTITION_LINUX_RAID_GUID \
49 	EFI_GUID( 0xa19d880f, 0x05fc, 0x4d3b, \
50 		0xa0, 0x06, 0x74, 0x3f, 0x0f, 0x84, 0x91, 0x1e)
51 #define PARTITION_LINUX_SWAP_GUID \
52 	EFI_GUID( 0x0657fd6d, 0xa4ab, 0x43c4, \
53 		0x84, 0xe5, 0x09, 0x33, 0xc8, 0x4b, 0x4f, 0x4f)
54 #define PARTITION_LINUX_LVM_GUID \
55 	EFI_GUID( 0xe6d6d379, 0xf507, 0x44c2, \
56 		0xa2, 0x3c, 0x23, 0x8f, 0x2a, 0x3d, 0xf9, 0x28)
57 
58 /* linux/include/efi.h */
59 typedef u16 efi_char16_t;
60 
61 /* based on linux/include/genhd.h */
62 struct partition {
63 	u8 boot_ind;		/* 0x80 - active */
64 	u8 head;		/* starting head */
65 	u8 sector;		/* starting sector */
66 	u8 cyl;			/* starting cylinder */
67 	u8 sys_ind;		/* What partition type */
68 	u8 end_head;		/* end head */
69 	u8 end_sector;		/* end sector */
70 	u8 end_cyl;		/* end cylinder */
71 	__le32 start_sect;	/* starting sector counting from 0 */
72 	__le32 nr_sects;	/* nr of sectors in partition */
73 } __packed;
74 
75 /* based on linux/fs/partitions/efi.h */
76 typedef struct _gpt_header {
77 	__le64 signature;
78 	__le32 revision;
79 	__le32 header_size;
80 	__le32 header_crc32;
81 	__le32 reserved1;
82 	__le64 my_lba;
83 	__le64 alternate_lba;
84 	__le64 first_usable_lba;
85 	__le64 last_usable_lba;
86 	efi_guid_t disk_guid;
87 	__le64 partition_entry_lba;
88 	__le32 num_partition_entries;
89 	__le32 sizeof_partition_entry;
90 	__le32 partition_entry_array_crc32;
91 } __packed gpt_header;
92 
93 typedef union _gpt_entry_attributes {
94 	struct {
95 		u64 required_to_function:1;
96 		u64 no_block_io_protocol:1;
97 		u64 legacy_bios_bootable:1;
98 		u64 reserved:45;
99 		u64 type_guid_specific:16;
100 	} fields;
101 	unsigned long long raw;
102 } __packed gpt_entry_attributes;
103 
104 #define PARTNAME_SZ	(72 / sizeof(efi_char16_t))
105 typedef struct _gpt_entry {
106 	efi_guid_t partition_type_guid;
107 	efi_guid_t unique_partition_guid;
108 	__le64 starting_lba;
109 	__le64 ending_lba;
110 	gpt_entry_attributes attributes;
111 	efi_char16_t partition_name[PARTNAME_SZ];
112 } __packed gpt_entry;
113 
114 typedef struct _legacy_mbr {
115 	u8 boot_code[MSDOS_MBR_BOOT_CODE_SIZE];
116 	__le32 unique_mbr_signature;
117 	__le16 unknown;
118 	struct partition partition_record[4];
119 	__le16 signature;
120 } __packed legacy_mbr;
121 
122 #endif	/* _DISK_PART_EFI_H */
123