include/part_efi.h

   1 /*
   2  * Copyright (C) 2008 RuggedCom, Inc.
   3  * Richard Retanubun <RichardRetanubun@RuggedCom.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 /*
   9  * See also linux/fs/partitions/efi.h
  10  *
  11  * EFI GUID Partition Table
  12  * Per Intel EFI Specification v1.02
  13  * http://developer.intel.com/technology/efi/efi.htm
  14 */
  15
  16 #include <linux/compiler.h>
  17
  18 #ifndef _DISK_PART_EFI_H
  19 #define _DISK_PART_EFI_H
  20
  21 #define MSDOS_MBR_SIGNATURE 0xAA55
  22 #define EFI_PMBR_OSTYPE_EFI 0xEF
  23 #define EFI_PMBR_OSTYPE_EFI_GPT 0xEE
  24
  25 #define GPT_HEADER_SIGNATURE 0x5452415020494645ULL
  26 #define GPT_HEADER_REVISION_V1 0x00010000
  27 #define GPT_PRIMARY_PARTITION_TABLE_LBA 1ULL
  28 #define GPT_ENTRY_NAME "gpt"
  29 #define GPT_ENTRY_NUMBERS               128
  30 #define GPT_ENTRY_SIZE                  128
  31
  32 #define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \
  33         ((efi_guid_t) \
  34         {{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \
  35                 (b) & 0xff, ((b) >> 8) & 0xff, \
  36                 (c) & 0xff, ((c) >> 8) & 0xff, \
  37                 (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})
  38
  39 #define PARTITION_SYSTEM_GUID \
  40         EFI_GUID( 0xC12A7328, 0xF81F, 0x11d2, \
  41                 0xBA, 0x4B, 0x00, 0xA0, 0xC9, 0x3E, 0xC9, 0x3B)
  42 #define LEGACY_MBR_PARTITION_GUID \
  43         EFI_GUID( 0x024DEE41, 0x33E7, 0x11d3, \
  44                 0x9D, 0x69, 0x00, 0x08, 0xC7, 0x81, 0xF3, 0x9F)
  45 #define PARTITION_MSFT_RESERVED_GUID \
  46         EFI_GUID( 0xE3C9E316, 0x0B5C, 0x4DB8, \
  47                 0x81, 0x7D, 0xF9, 0x2D, 0xF0, 0x02, 0x15, 0xAE)
  48 #define PARTITION_BASIC_DATA_GUID \
  49         EFI_GUID( 0xEBD0A0A2, 0xB9E5, 0x4433, \
  50                 0x87, 0xC0, 0x68, 0xB6, 0xB7, 0x26, 0x99, 0xC7)
  51 #define PARTITION_LINUX_RAID_GUID \
  52         EFI_GUID( 0xa19d880f, 0x05fc, 0x4d3b, \
  53                 0xa0, 0x06, 0x74, 0x3f, 0x0f, 0x84, 0x91, 0x1e)
  54 #define PARTITION_LINUX_SWAP_GUID \
  55         EFI_GUID( 0x0657fd6d, 0xa4ab, 0x43c4, \
  56                 0x84, 0xe5, 0x09, 0x33, 0xc8, 0x4b, 0x4f, 0x4f)
  57 #define PARTITION_LINUX_LVM_GUID \
  58         EFI_GUID( 0xe6d6d379, 0xf507, 0x44c2, \
  59                 0xa2, 0x3c, 0x23, 0x8f, 0x2a, 0x3d, 0xf9, 0x28)
  60
  61 /* linux/include/efi.h */
  62 typedef u16 efi_char16_t;
  63
  64 typedef struct {
  65         u8 b[16];
  66 } efi_guid_t;
  67
  68 /* based on linux/include/genhd.h */
  69 struct partition {
  70         u8 boot_ind;            /* 0x80 - active */
  71         u8 head;                /* starting head */
  72         u8 sector;              /* starting sector */
  73         u8 cyl;                 /* starting cylinder */
  74         u8 sys_ind;             /* What partition type */
  75         u8 end_head;            /* end head */
  76         u8 end_sector;          /* end sector */
  77         u8 end_cyl;             /* end cylinder */
  78         __le32 start_sect;      /* starting sector counting from 0 */
  79         __le32 nr_sects;        /* nr of sectors in partition */
  80 } __packed;
  81
  82 /* based on linux/fs/partitions/efi.h */
  83 typedef struct _gpt_header {
  84         __le64 signature;
  85         __le32 revision;
  86         __le32 header_size;
  87         __le32 header_crc32;
  88         __le32 reserved1;
  89         __le64 my_lba;
  90         __le64 alternate_lba;
  91         __le64 first_usable_lba;
  92         __le64 last_usable_lba;
  93         efi_guid_t disk_guid;
  94         __le64 partition_entry_lba;
  95         __le32 num_partition_entries;
  96         __le32 sizeof_partition_entry;
  97         __le32 partition_entry_array_crc32;
  98 } __packed gpt_header;
  99
 100 typedef union _gpt_entry_attributes {
 101         struct {
 102                 u64 required_to_function:1;
 103                 u64 no_block_io_protocol:1;
 104                 u64 legacy_bios_bootable:1;
 105                 u64 reserved:45;
 106                 u64 type_guid_specific:16;
 107         } fields;
 108         unsigned long long raw;
 109 } __packed gpt_entry_attributes;
 110
 111 #define PARTNAME_SZ     (72 / sizeof(efi_char16_t))
 112 typedef struct _gpt_entry {
 113         efi_guid_t partition_type_guid;
 114         efi_guid_t unique_partition_guid;
 115         __le64 starting_lba;
 116         __le64 ending_lba;
 117         gpt_entry_attributes attributes;
 118         efi_char16_t partition_name[PARTNAME_SZ];
 119 } __packed gpt_entry;
 120
 121 typedef struct _legacy_mbr {
 122         u8 boot_code[440];
 123         __le32 unique_mbr_signature;
 124         __le16 unknown;
 125         struct partition partition_record[4];
 126         __le16 signature;
 127 } __packed legacy_mbr;
 128
 129 #endif  /* _DISK_PART_EFI_H */