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  1. /*
  2.  * Copyright (c) 2007 Jakub Jermar
  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 fs
  30.  * @{
  31.  */
  32.  
  33. #ifndef FAT_FAT_H_
  34. #define FAT_FAT_H_
  35.  
  36. #include <ipc/ipc.h>
  37. #include <libfs.h>
  38. #include <atomic.h>
  39. #include <sys/types.h>
  40. #include <bool.h>
  41.  
  42. #define dprintf(...)    printf(__VA_ARGS__)
  43.  
  44. typedef struct {
  45.     uint8_t     ji[3];      /**< Jump instruction. */
  46.     uint8_t     oem_name[8];
  47.     /* BIOS Parameter Block */
  48.     uint16_t    bps;        /**< Bytes per sector. */
  49.     uint8_t     spc;        /**< Sectors per cluster. */
  50.     uint16_t    rsc;        /**< Reserved sector count. */
  51.     uint8_t     fatcnt;     /**< Number of FATs. */
  52.     uint16_t    root_ent_max;   /**< Maximum number of root directory
  53.                          entries. */
  54.     uint16_t    totsec;     /**< Total sectors. */
  55.     uint8_t     mdesc;      /**< Media descriptor. */
  56.     uint16_t    sec_per_fat;    /**< Sectors per FAT12/FAT16. */
  57.     uint16_t    sec_per_track;  /**< Sectors per track. */
  58.     uint16_t    headcnt;    /**< Number of heads. */
  59.     uint32_t    hidden_sec; /**< Hidden sectors. */
  60.     uint32_t    total_sec;  /**< Total sectors. */
  61.  
  62.     union {
  63.         struct {
  64.             /* FAT12/FAT16 only: Extended BIOS Parameter Block */
  65.             /** Physical drive number. */
  66.             uint8_t     pdn;
  67.             uint8_t     reserved;
  68.             /** Extended boot signature. */
  69.             uint8_t     ebs;
  70.             /** Serial number. */
  71.             uint32_t    id;
  72.             /** Volume label. */
  73.             uint8_t     label[11];
  74.             /** FAT type. */
  75.             uint8_t     type[8];
  76.             /** Boot code. */
  77.             uint8_t     boot_code[448];
  78.             /** Boot sector signature. */
  79.             uint16_t    signature;
  80.         } __attribute__ ((packed));
  81.         struct {
  82.             /* FAT32 only */
  83.             /** Sectors per FAT. */
  84.             uint32_t    sectors_per_fat;
  85.             /** FAT flags. */
  86.             uint16_t    flags;
  87.             /** Version. */
  88.             uint16_t    version;
  89.             /** Cluster number of root directory. */
  90.             uint32_t    root_cluster;
  91.             /** Sector number of file system information sector. */
  92.             uint16_t    fsinfo_sec;
  93.             /** Sector number of boot sector copy. */
  94.             uint16_t    bscopy_sec;
  95.             uint8_t     reserved1[12];
  96.             /** Physical drive number. */
  97.             uint8_t     pdn;
  98.             uint8_t     reserved2;
  99.             /** Extended boot signature. */
  100.             uint8_t     ebs;
  101.             /** Serial number. */
  102.             uint32_t    id;
  103.             /** Volume label. */
  104.             uint8_t     label;
  105.             /** FAT type. */
  106.             uint8_t     type[8];
  107.             /** Boot code. */
  108.             uint8_t     boot_code[420];
  109.             /** Signature. */
  110.             uint16_t    signature;
  111.         } __attribute__ ((packed));
  112.     };
  113. } __attribute__ ((packed)) fat_bs_t;
  114.  
  115. typedef struct {
  116.     uint8_t     name[8];
  117.     uint8_t     ext[3];
  118.     uint8_t     attr;
  119.     uint8_t     reserved;
  120.     uint8_t     ctime_fine;
  121.     uint16_t    ctime;
  122.     uint16_t    cdate;
  123.     uint16_t    adate;
  124.     union {
  125.         uint16_t    eaidx;      /* FAT12/FAT16 */
  126.         uint16_t    firstc_hi;  /* FAT32 */
  127.     };
  128.     uint16_t    mtime;
  129.     uint16_t    mdate;
  130.     union {
  131.         uint16_t    firstc;     /* FAT12/FAT16 */
  132.         uint16_t    firstc_lo;  /* FAT32 */
  133.     };
  134.     uint32_t    size;
  135. } __attribute__ ((packed)) fat_dentry_t;
  136.  
  137. extern fs_reg_t fat_reg;
  138.  
  139. extern void fat_lookup(ipc_callid_t, ipc_call_t *);
  140.  
  141. /*
  142.  * The following interfaces are rather fs-neutral and might be later moved to a
  143.  * dedicated library (e.g. libfs). We just wait until the interfaces stabilize
  144.  * and until there is more than one fs implementation.
  145.  */
  146. extern int block_read(int, unsigned long, void *);
  147. extern int block_write(int, unsigned long, void *);
  148.  
  149. extern void node_add_mp(int, unsigned long);
  150. extern void node_del_mp(int, unsigned long);
  151. extern bool node_is_mp(int, unsigned long);
  152.  
  153. #endif
  154.  
  155. /**
  156.  * @}
  157.  */
  158.