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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 | |||
141 | /* |
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142 | * The following interfaces are rather fs-neutral and might be later moved to a |
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143 | * dedicated library (e.g. libfs). We just wait until the interfaces stabilize |
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144 | * and until there is more than one fs implementation. |
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145 | */ |
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2627 | jermar | 146 | extern int block_read(int, unsigned long, void *); |
2638 | jermar | 147 | extern int block_write(int, unsigned long, void *); |
2627 | jermar | 148 | |
2638 | jermar | 149 | extern void node_add_mp(int, unsigned long); |
150 | extern void node_del_mp(int, unsigned long); |
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151 | extern bool node_is_mp(int, unsigned long); |
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2627 | jermar | 152 | |
153 | #endif |
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154 | |||
155 | /** |
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156 | * @} |
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157 | */ |