source: mainline/uspace/lib/label/include/std/mbr.h@ 1b23e33

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 1b23e33 was c02d098, checked in by Jiri Svoboda <jiri@…>, 10 years ago

Most of logical partition support.

  • Property mode set to 100644
File size: 2.8 KB
Line 
1/*
2 * Copyright (c) 2015 Jiri Svoboda
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/** @addtogroup bd
30 * @{
31 */
32/** @file
33 */
34
35#ifndef LIBLABEL_STD_MBR_H_
36#define LIBLABEL_STD_MBR_H_
37
38#include <stdint.h>
39
40enum {
41 /** Block address of Master Boot Record. */
42 mbr_ba = 0,
43
44 /** First block allowed for allocation */
45 mbr_ablock0 = 18,
46
47 /** Number of primary partition records */
48 mbr_nprimary = 4,
49
50 /** Boot record signature */
51 mbr_br_signature = 0xAA55,
52
53 /** EBR PTE slot describing partition corresponding to this EBR */
54 mbr_ebr_pte_this = 0,
55 /** EBR PTE slot describing the next EBR */
56 mbr_ebr_pte_next = 1
57};
58
59enum ptype {
60 /** Unused partition entry */
61 mbr_pt_unused = 0x00,
62 /** Extended partition */
63 mbr_pt_extended = 0x05
64};
65
66/** Structure of a partition table entry */
67typedef struct {
68 uint8_t status;
69 /** CHS of fist block in partition */
70 uint8_t first_chs[3];
71 /** Partition type */
72 uint8_t ptype;
73 /** CHS of last block in partition */
74 uint8_t last_chs[3];
75 /** LBA of first block in partition */
76 uint32_t first_lba;
77 /** Number of blocks in partition */
78 uint32_t length;
79} __attribute__((packed)) mbr_pte_t;
80
81/** Structure of a boot-record block */
82typedef struct {
83 /* Area for boot code */
84 uint8_t code_area[440];
85
86 /* Optional media ID */
87 uint32_t media_id;
88
89 uint16_t pad0;
90
91 /** Partition table entries */
92 mbr_pte_t pte[mbr_nprimary];
93
94 /** Boot record block signature (@c BR_SIGNATURE) */
95 uint16_t signature;
96} __attribute__((packed)) mbr_br_block_t;
97
98#endif
99
100/** @}
101 */
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