include/part_efi.h

   1 /*
   2  * Copyright (C) 2008 RuggedCom, Inc.
   3  * Richard Retanubun <RichardRetanubun@RuggedCom.com>
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 /*
  25  * See also linux/fs/partitions/efi.h
  26  *
  27  * EFI GUID Partition Table
  28  * Per Intel EFI Specification v1.02
  29  * http://developer.intel.com/technology/efi/efi.htm
  30 */
  31
  32 #include <linux/compiler.h>
  33
  34 #ifndef _DISK_PART_EFI_H
  35 #define _DISK_PART_EFI_H
  36
  37 #define MSDOS_MBR_SIGNATURE 0xAA55
  38 #define EFI_PMBR_OSTYPE_EFI 0xEF
  39 #define EFI_PMBR_OSTYPE_EFI_GPT 0xEE
  40
  41 #define GPT_HEADER_SIGNATURE 0x5452415020494645ULL
  42 #define GPT_HEADER_REVISION_V1 0x00010000
  43 #define GPT_PRIMARY_PARTITION_TABLE_LBA 1ULL
  44 #define GPT_ENTRY_NAME "gpt"
  45 #define GPT_ENTRY_NUMBERS               128
  46 #define GPT_ENTRY_SIZE                  128
  47
  48 #define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \
  49         ((efi_guid_t) \
  50         {{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \
  51                 (b) & 0xff, ((b) >> 8) & 0xff, \
  52                 (c) & 0xff, ((c) >> 8) & 0xff, \
  53                 (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})
  54
  55 #define PARTITION_SYSTEM_GUID \
  56         EFI_GUID( 0xC12A7328, 0xF81F, 0x11d2, \
  57                 0xBA, 0x4B, 0x00, 0xA0, 0xC9, 0x3E, 0xC9, 0x3B)
  58 #define LEGACY_MBR_PARTITION_GUID \
  59         EFI_GUID( 0x024DEE41, 0x33E7, 0x11d3, \
  60                 0x9D, 0x69, 0x00, 0x08, 0xC7, 0x81, 0xF3, 0x9F)
  61 #define PARTITION_MSFT_RESERVED_GUID \
  62         EFI_GUID( 0xE3C9E316, 0x0B5C, 0x4DB8, \
  63                 0x81, 0x7D, 0xF9, 0x2D, 0xF0, 0x02, 0x15, 0xAE)
  64 #define PARTITION_BASIC_DATA_GUID \
  65         EFI_GUID( 0xEBD0A0A2, 0xB9E5, 0x4433, \
  66                 0x87, 0xC0, 0x68, 0xB6, 0xB7, 0x26, 0x99, 0xC7)
  67 #define PARTITION_LINUX_RAID_GUID \
  68         EFI_GUID( 0xa19d880f, 0x05fc, 0x4d3b, \
  69                 0xa0, 0x06, 0x74, 0x3f, 0x0f, 0x84, 0x91, 0x1e)
  70 #define PARTITION_LINUX_SWAP_GUID \
  71         EFI_GUID( 0x0657fd6d, 0xa4ab, 0x43c4, \
  72                 0x84, 0xe5, 0x09, 0x33, 0xc8, 0x4b, 0x4f, 0x4f)
  73 #define PARTITION_LINUX_LVM_GUID \
  74         EFI_GUID( 0xe6d6d379, 0xf507, 0x44c2, \
  75                 0xa2, 0x3c, 0x23, 0x8f, 0x2a, 0x3d, 0xf9, 0x28)
  76
  77 /* linux/include/efi.h */
  78 typedef u16 efi_char16_t;
  79
  80 typedef struct {
  81         u8 b[16];
  82 } efi_guid_t;
  83
  84 /* based on linux/include/genhd.h */
  85 struct partition {
  86         u8 boot_ind;            /* 0x80 - active */
  87         u8 head;                /* starting head */
  88         u8 sector;              /* starting sector */
  89         u8 cyl;                 /* starting cylinder */
  90         u8 sys_ind;             /* What partition type */
  91         u8 end_head;            /* end head */
  92         u8 end_sector;          /* end sector */
  93         u8 end_cyl;             /* end cylinder */
  94         __le32 start_sect;      /* starting sector counting from 0 */
  95         __le32 nr_sects;        /* nr of sectors in partition */
  96 } __packed;
  97
  98 /* based on linux/fs/partitions/efi.h */
  99 typedef struct _gpt_header {
 100         __le64 signature;
 101         __le32 revision;
 102         __le32 header_size;
 103         __le32 header_crc32;
 104         __le32 reserved1;
 105         __le64 my_lba;
 106         __le64 alternate_lba;
 107         __le64 first_usable_lba;
 108         __le64 last_usable_lba;
 109         efi_guid_t disk_guid;
 110         __le64 partition_entry_lba;
 111         __le32 num_partition_entries;
 112         __le32 sizeof_partition_entry;
 113         __le32 partition_entry_array_crc32;
 114 } __packed gpt_header;
 115
 116 typedef union _gpt_entry_attributes {
 117         struct {
 118                 u64 required_to_function:1;
 119                 u64 no_block_io_protocol:1;
 120                 u64 legacy_bios_bootable:1;
 121                 u64 reserved:45;
 122                 u64 type_guid_specific:16;
 123         } fields;
 124         unsigned long long raw;
 125 } __packed gpt_entry_attributes;
 126
 127 #define PARTNAME_SZ     (72 / sizeof(efi_char16_t))
 128 typedef struct _gpt_entry {
 129         efi_guid_t partition_type_guid;
 130         efi_guid_t unique_partition_guid;
 131         __le64 starting_lba;
 132         __le64 ending_lba;
 133         gpt_entry_attributes attributes;
 134         efi_char16_t partition_name[PARTNAME_SZ];
 135 } __packed gpt_entry;
 136
 137 typedef struct _legacy_mbr {
 138         u8 boot_code[440];
 139         __le32 unique_mbr_signature;
 140         __le16 unknown;
 141         struct partition partition_record[4];
 142         __le16 signature;
 143 } __packed legacy_mbr;
 144
 145 #endif  /* _DISK_PART_EFI_H */