source: rtems/cpukit/libblock/include/rtems/ide_part_table.h @ 8b96149

4.104.114.84.95
Last change on this file since 8b96149 was 8b96149, checked in by Ralf Corsepius <ralf.corsepius@…>, on Apr 17, 2004 at 8:15:17 AM

Remove stray white spaces.

  • Property mode set to 100644
File size: 5.6 KB
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1/*****************************************************************************
2 *
3 * ide_part_table.h
4 *
5 * The header file for library supporting "MS-DOS-style" partition table
6 *
7 *
8 * Copyright (C) 2002 OKTET Ltd., St.-Petersburg, Russia
9 *
10 * Author: Konstantin Abramenko <Konstantin.Abramenko@oktet.ru>
11 *         Alexander Kukuta <Alexander.Kukuta@oktet.ru>
12 *
13 *  The license and distribution terms for this file may be
14 *  found in the file LICENSE in this distribution or at
15 *  http://www.rtems.com/license/LICENSE.
16 *
17 * $Id$
18 *
19 *****************************************************************************/
20
21#ifndef __RTEMS_IDE_PART_TABLE_H__
22#define __RTEMS_IDE_PART_TABLE_H__
23
24#include <assert.h>
25#include <rtems/chain.h>
26#include <stdio.h>
27#include <stdlib.h>
28#include <string.h>
29#include <errno.h>
30#include <sys/ioctl.h>
31#include <sys/types.h>
32#include <sys/stat.h>
33#include <unistd.h>
34#include <fcntl.h>
35#include <rtems.h>
36#include <rtems/blkdev.h>
37#include <rtems/libio.h>
38#include <rtems/libio_.h>
39#include <rtems/bdbuf.h>
40#include <rtems/seterr.h>
41
42/* Minor base number for all logical devices */
43#define RTEMS_IDE_SECTOR_BITS                             9
44#define RTEMS_IDE_SECTOR_SIZE                             512
45#define RTEMS_IDE_PARTITION_DESCRIPTOR_SIZE               16
46#define RTEMS_IDE_PARTITION_MAX_PARTITION_NUMBER          63
47#define RTEMS_IDE_PARTITION_MAX_SUB_PARTITION_NUMBER      4
48#define RTEMS_IDE_PARTITION_DEV_NAME_LENGTH_MAX           16
49
50#define RTEMS_IDE_PARTITION_MSDOS_SIGNATURE_DATA1         0x55
51#define RTEMS_IDE_PARTITION_MSDOS_SIGNATURE_DATA2         0xaa
52#define RTEMS_IDE_PARTITION_MSDOS_SIGNATURE_OFFSET        0x1fe
53#define RTEMS_IDE_PARTITION_TABLE_OFFSET                  0x1be
54#define RTEMS_IDE_PARTITION_BOOTABLE_OFFSET               0
55#define RTEMS_IDE_PARTITION_SYS_TYPE_OFFSET               4
56#define RTEMS_IDE_PARTITION_START_OFFSET                  8
57#define RTEMS_IDE_PARTITION_SIZE_OFFSET                   12
58
59/*
60 * Conversion from and to little-endian byte order. (no-op on i386/i486)
61 */
62
63#if (CPU_BIG_ENDIAN == TRUE)
64#   define LE_TO_CPU_U16(v) CPU_swap_u16(v)
65#   define LE_TO_CPU_U32(v) CPU_swap_u32(v)
66#   define CPU_TO_LE_U16(v) CPU_swap_u16(v)
67#   define CPU_TO_LE_U32(v) CPU_swap_u32(v)
68#else
69#   define LE_TO_CPU_U16(v) (v)
70#   define LE_TO_CPU_U32(v) (v)
71#   define CPU_TO_LE_U16(v) (v)
72#   define CPU_TO_LE_U32(v) (v)
73#endif
74
75
76/*
77 * sector_data_t --
78 *      corresponds to the sector on the device
79 */
80typedef struct sector_data_s
81{
82    uint32_t   sector_num; /* sector number on the device */
83    uint8_t    data[0]; /* raw sector data */
84} sector_data_t;
85
86
87/*
88 * Enum partition types
89 * see list at http://ata-atapi.com/hiwtab.htm
90 */
91enum {
92    EMPTY_PARTITION     = 0x00,
93    DOS_FAT12_PARTITION = 0x01,
94    DOS_FAT16_PARTITION = 0x04,
95    EXTENDED_PARTITION  = 0x05,
96    DOS_P32MB_PARTITION = 0x06,
97    FAT32_PARTITION     = 0x0B,
98    FAT32_LBA_PARTITION = 0x0C,
99    FAT16_LBA_PARTITION = 0x0E,
100    DM6_PARTITION       = 0x54,
101    EZD_PARTITION       = 0x55,
102    DM6_AUX1PARTITION   = 0x51,
103    DM6_AUX3PARTITION   = 0x53,
104    LINUX_SWAP          = 0x82,
105    LINUX_NATIVE        = 0x83,
106    LINUX_EXTENDED      = 0x85
107};
108
109
110/* Forward declaration */
111struct disk_desc_s;
112
113/*
114 * part_desc_t --
115 *      contains all neccessary information about partition
116 */
117typedef struct part_desc_s {
118    uint8_t             bootable; /* is the partition active */
119    uint8_t             sys_type; /* type of partition */
120    uint8_t             log_id; /* logical number of partition */
121    uint32_t            start; /* first partition sector, in absolute numeration */
122    uint32_t            size; /* size in sectors */
123    uint32_t            end; /* last partition sector, end = start + size - 1 */
124    struct disk_desc_s *disk_desc; /* descriptor of disk, partition contains in */
125    struct part_desc_s *ext_part; /* extended partition containing this one */
126
127    /* partitions, containing in this one */
128    struct part_desc_s *sub_part[RTEMS_IDE_PARTITION_MAX_SUB_PARTITION_NUMBER];
129} part_desc_t;
130
131
132
133typedef struct disk_desc_s {
134    dev_t        dev; /* device number */
135
136    /* device name in /dev filesystem */
137    uint8_t      dev_name[RTEMS_IDE_PARTITION_DEV_NAME_LENGTH_MAX];
138
139    uint32_t     sector_size; /* size of sector */
140    uint32_t     sector_bits; /* the base-2 logarithm of sector_size */
141    uint32_t     lba_size; /* total amount of sectors in lba address mode */
142    int          last_log_id; /* used for logical disks enumerating */
143
144    /* primary partition descriptors */
145    part_desc_t *partitions[RTEMS_IDE_PARTITION_MAX_PARTITION_NUMBER];
146} disk_desc_t;
147
148
149/*
150 * rtems_ide_part_table_free --
151 *      frees disk descriptor structure
152 *
153 * PARAMETERS:
154 *      disk_desc - disc descriptor structure to free
155 *
156 * RETURNS:
157 *      N/A
158 */
159void
160rtems_ide_part_table_free(disk_desc_t *disk_desc);
161
162
163/*
164 * rtems_ide_part_table_get --
165 *      reads partition table structure from the device
166 *      and creates disk description structure
167 *
168 * PARAMETERS:
169 *      dev_name  - path to physical device in /dev filesystem
170 *      disk_desc - returned disc description structure
171 *
172 * RETURNS:
173 *      RTEMS_SUCCESSFUL if success, or -1 and corresponding errno else
174 */
175rtems_status_code
176rtems_ide_part_table_get(const char *dev_name, disk_desc_t *disk_desc);
177
178
179/*
180 * rtems_ide_part_table_initialize --
181 *      initializes logical devices on the physical IDE drive
182 *
183 * PARAMETERS:
184 *      dev_name - path to physical device in /dev filesystem
185 *
186 * RETURNS:
187 *      RTEMS_SUCCESSFUL if success, or -1 and corresponding errno else
188 */
189rtems_status_code
190rtems_ide_part_table_initialize(char *dev_name);
191
192
193#endif /* __RTEMS_IDE_PART_TABLE_H__ */
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