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| 2627 | jermar | 1 | /* |
| 2 | * Copyright (c) 2007 Jakub Jermar |
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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 | |||
| 29 | /** @addtogroup fs |
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| 30 | * @{ |
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| 31 | */ |
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| 32 | |||
| 33 | #ifndef FAT_FAT_H_ |
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| 34 | #define FAT_FAT_H_ |
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| 35 | |||
| 36 | #include <ipc/ipc.h> |
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| 2643 | jermar | 37 | #include <libfs.h> |
| 2627 | jermar | 38 | #include <atomic.h> |
| 39 | #include <sys/types.h> |
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| 40 | #include <bool.h> |
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| 41 | |||
| 42 | #define dprintf(...) printf(__VA_ARGS__) |
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| 43 | |||
| 2628 | jermar | 44 | typedef struct { |
| 45 | uint8_t ji[3]; /**< Jump instruction. */ |
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| 46 | uint8_t oem_name[8]; |
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| 47 | /* BIOS Parameter Block */ |
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| 48 | uint16_t bps; /**< Bytes per sector. */ |
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| 49 | uint8_t spc; /**< Sectors per cluster. */ |
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| 50 | uint16_t rsc; /**< Reserved sector count. */ |
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| 51 | uint8_t fatcnt; /**< Number of FATs. */ |
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| 52 | uint16_t root_ent_max; /**< Maximum number of root directory |
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| 53 | entries. */ |
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| 54 | uint16_t totsec; /**< Total sectors. */ |
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| 55 | uint8_t mdesc; /**< Media descriptor. */ |
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| 56 | uint16_t sec_per_fat; /**< Sectors per FAT12/FAT16. */ |
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| 57 | uint16_t sec_per_track; /**< Sectors per track. */ |
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| 58 | uint16_t headcnt; /**< Number of heads. */ |
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| 59 | uint32_t hidden_sec; /**< Hidden sectors. */ |
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| 60 | uint32_t total_sec; /**< Total sectors. */ |
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| 61 | |||
| 62 | union { |
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| 63 | struct { |
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| 64 | /* FAT12/FAT16 only: Extended BIOS Parameter Block */ |
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| 65 | /** Physical drive number. */ |
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| 66 | uint8_t pdn; |
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| 67 | uint8_t reserved; |
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| 68 | /** Extended boot signature. */ |
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| 69 | uint8_t ebs; |
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| 70 | /** Serial number. */ |
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| 71 | uint32_t id; |
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| 72 | /** Volume label. */ |
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| 73 | uint8_t label[11]; |
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| 74 | /** FAT type. */ |
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| 75 | uint8_t type[8]; |
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| 76 | /** Boot code. */ |
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| 77 | uint8_t boot_code[448]; |
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| 78 | /** Boot sector signature. */ |
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| 79 | uint16_t signature; |
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| 80 | } __attribute__ ((packed)); |
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| 81 | struct { |
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| 82 | /* FAT32 only */ |
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| 83 | /** Sectors per FAT. */ |
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| 84 | uint32_t sectors_per_fat; |
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| 85 | /** FAT flags. */ |
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| 86 | uint16_t flags; |
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| 87 | /** Version. */ |
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| 88 | uint16_t version; |
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| 89 | /** Cluster number of root directory. */ |
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| 90 | uint32_t root_cluster; |
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| 91 | /** Sector number of file system information sector. */ |
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| 92 | uint16_t fsinfo_sec; |
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| 93 | /** Sector number of boot sector copy. */ |
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| 94 | uint16_t bscopy_sec; |
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| 95 | uint8_t reserved1[12]; |
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| 96 | /** Physical drive number. */ |
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| 97 | uint8_t pdn; |
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| 98 | uint8_t reserved2; |
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| 99 | /** Extended boot signature. */ |
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| 100 | uint8_t ebs; |
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| 101 | /** Serial number. */ |
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| 102 | uint32_t id; |
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| 103 | /** Volume label. */ |
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| 104 | uint8_t label; |
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| 105 | /** FAT type. */ |
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| 106 | uint8_t type[8]; |
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| 107 | /** Boot code. */ |
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| 108 | uint8_t boot_code[420]; |
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| 109 | /** Signature. */ |
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| 110 | uint16_t signature; |
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| 111 | } __attribute__ ((packed)); |
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| 112 | }; |
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| 2629 | jermar | 113 | } __attribute__ ((packed)) fat_bs_t; |
| 2628 | jermar | 114 | |
| 2629 | jermar | 115 | typedef struct { |
| 116 | uint8_t name[8]; |
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| 117 | uint8_t ext[3]; |
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| 118 | uint8_t attr; |
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| 119 | uint8_t reserved; |
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| 120 | uint8_t ctime_fine; |
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| 121 | uint16_t ctime; |
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| 122 | uint16_t cdate; |
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| 123 | uint16_t adate; |
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| 124 | union { |
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| 125 | uint16_t eaidx; /* FAT12/FAT16 */ |
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| 126 | uint16_t firstc_hi; /* FAT32 */ |
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| 127 | }; |
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| 128 | uint16_t mtime; |
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| 129 | uint16_t mdate; |
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| 130 | union { |
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| 131 | uint16_t firstc; /* FAT12/FAT16 */ |
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| 132 | uint16_t firstc_lo; /* FAT32 */ |
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| 133 | }; |
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| 134 | uint32_t size; |
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| 135 | } __attribute__ ((packed)) fat_dentry_t; |
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| 136 | |||
| 2643 | jermar | 137 | extern fs_reg_t fat_reg; |
| 2627 | jermar | 138 | |
| 2638 | jermar | 139 | extern void fat_lookup(ipc_callid_t, ipc_call_t *); |
| 140 | |||
| 2627 | jermar | 141 | #endif |
| 142 | |||
| 143 | /** |
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| 144 | * @} |
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| 145 | */ |