include/part_efi.h

   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_UBOOT 0x5452415020494645ULL // 'EFI PART'
  28 #define GPT_HEADER_CHROMEOS_IGNORE 0x454d45524f4e4749ULL // 'IGNOREME'
  29
  30 #define GPT_HEADER_REVISION_V1 0x00010000
  31 #define GPT_PRIMARY_PARTITION_TABLE_LBA 1ULL
  32 #define GPT_ENTRY_NUMBERS               CONFIG_EFI_PARTITION_ENTRIES_NUMBERS
  33 #define GPT_ENTRY_SIZE                  128
  34
  35 #define PARTITION_SYSTEM_GUID \
  36         EFI_GUID( 0xC12A7328, 0xF81F, 0x11d2, \
  37                 0xBA, 0x4B, 0x00, 0xA0, 0xC9, 0x3E, 0xC9, 0x3B)
  38 #define LEGACY_MBR_PARTITION_GUID \
  39         EFI_GUID( 0x024DEE41, 0x33E7, 0x11d3, \
  40                 0x9D, 0x69, 0x00, 0x08, 0xC7, 0x81, 0xF3, 0x9F)
  41 #define PARTITION_MSFT_RESERVED_GUID \
  42         EFI_GUID( 0xE3C9E316, 0x0B5C, 0x4DB8, \
  43                 0x81, 0x7D, 0xF9, 0x2D, 0xF0, 0x02, 0x15, 0xAE)
  44 #define PARTITION_BASIC_DATA_GUID \
  45         EFI_GUID( 0xEBD0A0A2, 0xB9E5, 0x4433, \
  46                 0x87, 0xC0, 0x68, 0xB6, 0xB7, 0x26, 0x99, 0xC7)
  47 #define PARTITION_LINUX_FILE_SYSTEM_DATA_GUID \
  48         EFI_GUID(0x0FC63DAF, 0x8483, 0x4772, \
  49                 0x8E, 0x79, 0x3D, 0x69, 0xD8, 0x47, 0x7D, 0xE4)
  50 #define PARTITION_LINUX_RAID_GUID \
  51         EFI_GUID( 0xa19d880f, 0x05fc, 0x4d3b, \
  52                 0xa0, 0x06, 0x74, 0x3f, 0x0f, 0x84, 0x91, 0x1e)
  53 #define PARTITION_LINUX_SWAP_GUID \
  54         EFI_GUID( 0x0657fd6d, 0xa4ab, 0x43c4, \
  55                 0x84, 0xe5, 0x09, 0x33, 0xc8, 0x4b, 0x4f, 0x4f)
  56 #define PARTITION_LINUX_LVM_GUID \
  57         EFI_GUID( 0xe6d6d379, 0xf507, 0x44c2, \
  58                 0xa2, 0x3c, 0x23, 0x8f, 0x2a, 0x3d, 0xf9, 0x28)
  59 #define PARTITION_U_BOOT_ENVIRONMENT \
  60         EFI_GUID( 0x3de21764, 0x95bd, 0x54bd, \
  61                 0xa5, 0xc3, 0x4a, 0xbe, 0x78, 0x6f, 0x38, 0xa8)
  62
  63 /* linux/include/efi.h */
  64 typedef u16 efi_char16_t;
  65
  66 /* based on linux/include/genhd.h */
  67 struct partition {
  68         u8 boot_ind;            /* 0x80 - active */
  69         u8 head;                /* starting head */
  70         u8 sector;              /* starting sector */
  71         u8 cyl;                 /* starting cylinder */
  72         u8 sys_ind;             /* What partition type */
  73         u8 end_head;            /* end head */
  74         u8 end_sector;          /* end sector */
  75         u8 end_cyl;             /* end cylinder */
  76         __le32 start_sect;      /* starting sector counting from 0 */
  77         __le32 nr_sects;        /* nr of sectors in partition */
  78 } __packed;
  79
  80 /* based on linux/fs/partitions/efi.h */
  81 typedef struct _gpt_header {
  82         __le64 signature;
  83         __le32 revision;
  84         __le32 header_size;
  85         __le32 header_crc32;
  86         __le32 reserved1;
  87         __le64 my_lba;
  88         __le64 alternate_lba;
  89         __le64 first_usable_lba;
  90         __le64 last_usable_lba;
  91         efi_guid_t disk_guid;
  92         __le64 partition_entry_lba;
  93         __le32 num_partition_entries;
  94         __le32 sizeof_partition_entry;
  95         __le32 partition_entry_array_crc32;
  96 } __packed gpt_header;
  97
  98 typedef union _gpt_entry_attributes {
  99         struct {
 100                 u64 required_to_function:1;
 101                 u64 no_block_io_protocol:1;
 102                 u64 legacy_bios_bootable:1;
 103                 u64 reserved:45;
 104                 u64 type_guid_specific:16;
 105         } fields;
 106         unsigned long long raw;
 107 } __packed gpt_entry_attributes;
 108
 109 #define PARTNAME_SZ     (72 / sizeof(efi_char16_t))
 110 typedef struct _gpt_entry {
 111         efi_guid_t partition_type_guid;
 112         efi_guid_t unique_partition_guid;
 113         __le64 starting_lba;
 114         __le64 ending_lba;
 115         gpt_entry_attributes attributes;
 116         efi_char16_t partition_name[PARTNAME_SZ];
 117 } __packed gpt_entry;
 118
 119 typedef struct _legacy_mbr {
 120         u8 boot_code[MSDOS_MBR_BOOT_CODE_SIZE];
 121         __le32 unique_mbr_signature;
 122         __le16 unknown;
 123         struct partition partition_record[4];
 124         __le16 signature;
 125 } __packed legacy_mbr;
 126
 127 #endif  /* _DISK_PART_EFI_H */