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