FreeBSD/Linux Kernel Cross Reference
sys/fs/filecorefs/filecore.h

     /*      $NetBSD: filecore.h,v 1.3 2003/09/06 13:56:42 jdolecek Exp $    */
     
     /*-
      * Copyright (c) 1994 The Regents of the University of California.
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      filecore.h              1.0     1998/6/1
     */
    
    /*-
     * Copyright (c) 1998 Andrew McMurry
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the University of
     *      California, Berkeley and its contributors.
     * 4. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      filecore.h              1.0     1998/6/1
     */
    
    /*
     * Definitions describing Acorn Filecore file system structure, as well as
     * the functions necessary to access fields of filecore file system
     * structures.
     */
    
    #define FILECORE_BOOTBLOCK_BLKN 6
    #define FILECORE_BOOTBLOCK_SIZE 0x200
    #define FILECORE_BB_DISCREC     0x1C0
    #define FILECORE_DISCREC_SIZE   60
    #define FILECORE_DIR_SIZE       2048
    #define FILECORE_DIRENT_SIZE    26
    #define FILECORE_MAXDIRENTS     77
    
    #define FILECORE_ROOTINO        0xFFFFFFFF
    #define FILECORE_INO_MASK       0x00FFFFFF
    #define FILECORE_INO_INDEX      24
    
    #define FILECORE_ATTR_READ      1
    #define FILECORE_ATTR_WRITE     2
    #define FILECORE_ATTR_DIR       8
    #define FILECORE_ATTR_OREAD     32
    #define FILECORE_ATTR_OWRITE    64
    
    #if 0
    #define FILECORE_DEBUG
    #define FILECORE_DEBUG_BR
    #endif
    
    struct filecore_disc_record {
            unsigned log2secsize:8;         /* base 2 log of the sector size */
            unsigned secspertrack:8;        /* number of sectors per track */
           unsigned heads:8;               /* number of heads */
           unsigned density:8;             /* 0: harddisc, else floppy density */
           unsigned idlen:8;               /* length of fragment id in bits */
           unsigned log2bpmb:8;            /* base 2 log of the bytes per FAU */
           unsigned skew:8;                /* track to sector skew */
           unsigned bootoption:8;          /* *OPT option */
           unsigned lowsector:8;           /* lowest sector id on a track */
           unsigned nzones:8;              /* number of zones in the map */
           unsigned zone_spare:16;         /* number of non-map bits per zone */
           unsigned root;                  /* address of root directory */
           unsigned disc_size;             /* disc size in bytes (low word) */
           unsigned disc_id:16;            /* disc cycle id */
           char     disc_name[10];         /* disc name */
           unsigned disc_type;             /* disc type */
           unsigned disc_size_2;           /* disc size in bytes (high word) */
           unsigned share_size:8;          /* base 2 log sharing granularity */
           unsigned big_flag:8;            /* 1 if disc > 512Mb */
           char     reserved[18];
   } __attribute__((__packed__));
   
   struct filecore_direntry {
           char     name[10];
           unsigned load:32;
           unsigned exec:32;
           unsigned len:32;
           unsigned addr:24;
           unsigned attr:8;
   } __attribute__((__packed__));
   
   struct filecore_dirhead {
           unsigned mas_seq:8;
           unsigned chkname:32;
   } __attribute__((__packed__));
   
   struct filecore_dirtail {
           unsigned lastmark:8;
           unsigned reserved:16;
           unsigned parent1:16;
           unsigned parent2:8;
           char     title[19];
           char     name[10];
           unsigned mas_seq:8;
           unsigned chkname:32;
           unsigned checkbyte:8;
   } __attribute__((__packed__));
   
   #define fcdirhead(dp) ((struct filecore_dirhead *)(dp))
   #define fcdirentry(dp,n) (((struct filecore_direntry *)(((char *)(dp))+5))+(n))
   #define fcdirtail(dp) ((struct filecore_dirtail *)(((char *)(dp))+2007))

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