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