linux/block/partitions/efi.h
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   1/************************************************************
   2 * EFI GUID Partition Table
   3 * Per Intel EFI Specification v1.02
   4 * http://developer.intel.com/technology/efi/efi.htm
   5 *
   6 * By Matt Domsch <Matt_Domsch@dell.com>  Fri Sep 22 22:15:56 CDT 2000  
   7 *   Copyright 2000,2001 Dell Inc.
   8 *
   9 *  This program is free software; you can redistribute it and/or modify
  10 *  it under the terms of the GNU General Public License as published by
  11 *  the Free Software Foundation; either version 2 of the License, or
  12 *  (at your option) any later version.
  13 * 
  14 *  This program is distributed in the hope that it will be useful,
  15 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 *  GNU General Public License for more details.
  18 *
  19 *  You should have received a copy of the GNU General Public License
  20 *  along with this program; if not, write to the Free Software
  21 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22 * 
  23 ************************************************************/
  24
  25#ifndef FS_PART_EFI_H_INCLUDED
  26#define FS_PART_EFI_H_INCLUDED
  27
  28#include <linux/types.h>
  29#include <linux/fs.h>
  30#include <linux/genhd.h>
  31#include <linux/kernel.h>
  32#include <linux/major.h>
  33#include <linux/string.h>
  34#include <linux/efi.h>
  35
  36#define MSDOS_MBR_SIGNATURE 0xaa55
  37#define EFI_PMBR_OSTYPE_EFI 0xEF
  38#define EFI_PMBR_OSTYPE_EFI_GPT 0xEE
  39
  40#define GPT_HEADER_SIGNATURE 0x5452415020494645ULL
  41#define GPT_HEADER_REVISION_V1 0x00010000
  42#define GPT_PRIMARY_PARTITION_TABLE_LBA 1
  43
  44#define PARTITION_SYSTEM_GUID \
  45    EFI_GUID( 0xC12A7328, 0xF81F, 0x11d2, \
  46              0xBA, 0x4B, 0x00, 0xA0, 0xC9, 0x3E, 0xC9, 0x3B) 
  47#define LEGACY_MBR_PARTITION_GUID \
  48    EFI_GUID( 0x024DEE41, 0x33E7, 0x11d3, \
  49              0x9D, 0x69, 0x00, 0x08, 0xC7, 0x81, 0xF3, 0x9F)
  50#define PARTITION_MSFT_RESERVED_GUID \
  51    EFI_GUID( 0xE3C9E316, 0x0B5C, 0x4DB8, \
  52              0x81, 0x7D, 0xF9, 0x2D, 0xF0, 0x02, 0x15, 0xAE)
  53#define PARTITION_BASIC_DATA_GUID \
  54    EFI_GUID( 0xEBD0A0A2, 0xB9E5, 0x4433, \
  55              0x87, 0xC0, 0x68, 0xB6, 0xB7, 0x26, 0x99, 0xC7)
  56#define PARTITION_LINUX_RAID_GUID \
  57    EFI_GUID( 0xa19d880f, 0x05fc, 0x4d3b, \
  58              0xa0, 0x06, 0x74, 0x3f, 0x0f, 0x84, 0x91, 0x1e)
  59#define PARTITION_LINUX_SWAP_GUID \
  60    EFI_GUID( 0x0657fd6d, 0xa4ab, 0x43c4, \
  61              0x84, 0xe5, 0x09, 0x33, 0xc8, 0x4b, 0x4f, 0x4f)
  62#define PARTITION_LINUX_LVM_GUID \
  63    EFI_GUID( 0xe6d6d379, 0xf507, 0x44c2, \
  64              0xa2, 0x3c, 0x23, 0x8f, 0x2a, 0x3d, 0xf9, 0x28)
  65
  66typedef struct _gpt_header {
  67        __le64 signature;
  68        __le32 revision;
  69        __le32 header_size;
  70        __le32 header_crc32;
  71        __le32 reserved1;
  72        __le64 my_lba;
  73        __le64 alternate_lba;
  74        __le64 first_usable_lba;
  75        __le64 last_usable_lba;
  76        efi_guid_t disk_guid;
  77        __le64 partition_entry_lba;
  78        __le32 num_partition_entries;
  79        __le32 sizeof_partition_entry;
  80        __le32 partition_entry_array_crc32;
  81
  82        /* The rest of the logical block is reserved by UEFI and must be zero.
  83         * EFI standard handles this by:
  84         *
  85         * uint8_t              reserved2[ BlockSize - 92 ];
  86         */
  87} __attribute__ ((packed)) gpt_header;
  88
  89typedef struct _gpt_entry_attributes {
  90        u64 required_to_function:1;
  91        u64 reserved:47;
  92        u64 type_guid_specific:16;
  93} __attribute__ ((packed)) gpt_entry_attributes;
  94
  95typedef struct _gpt_entry {
  96        efi_guid_t partition_type_guid;
  97        efi_guid_t unique_partition_guid;
  98        __le64 starting_lba;
  99        __le64 ending_lba;
 100        gpt_entry_attributes attributes;
 101        efi_char16_t partition_name[72 / sizeof (efi_char16_t)];
 102} __attribute__ ((packed)) gpt_entry;
 103
 104typedef struct _legacy_mbr {
 105        u8 boot_code[440];
 106        __le32 unique_mbr_signature;
 107        __le16 unknown;
 108        struct partition partition_record[4];
 109        __le16 signature;
 110} __attribute__ ((packed)) legacy_mbr;
 111
 112/* Functions */
 113extern int efi_partition(struct parsed_partitions *state);
 114
 115#endif
 116
 117/*
 118 * Overrides for Emacs so that we follow Linus's tabbing style.
 119 * Emacs will notice this stuff at the end of the file and automatically
 120 * adjust the settings for this buffer only.  This must remain at the end
 121 * of the file.
 122 * --------------------------------------------------------------------------
 123 * Local variables:
 124 * c-indent-level: 4 
 125 * c-brace-imaginary-offset: 0
 126 * c-brace-offset: -4
 127 * c-argdecl-indent: 4
 128 * c-label-offset: -4
 129 * c-continued-statement-offset: 4
 130 * c-continued-brace-offset: 0
 131 * indent-tabs-mode: nil
 132 * tab-width: 8
 133 * End:
 134 */
 135
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