sys/fs/filecorefs/filecore.h

   1 /*      $NetBSD: filecore.h,v 1.4 2005/12/03 17:34:43 christos Exp $    */
   2
   3 /*-
   4  * Copyright (c) 1994 The Regents of the University of California.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  *      filecore.h              1.0     1998/6/1
  32  */
  33
  34 /*-
  35  * Copyright (c) 1998 Andrew McMurry
  36  *
  37  * Redistribution and use in source and binary forms, with or without
  38  * modification, are permitted provided that the following conditions
  39  * are met:
  40  * 1. Redistributions of source code must retain the above copyright
  41  *    notice, this list of conditions and the following disclaimer.
  42  * 2. Redistributions in binary form must reproduce the above copyright
  43  *    notice, this list of conditions and the following disclaimer in the
  44  *    documentation and/or other materials provided with the distribution.
  45  * 3. All advertising materials mentioning features or use of this software
  46  *    must display the following acknowledgement:
  47  *      This product includes software developed by the University of
  48  *      California, Berkeley and its contributors.
  49  * 4. Neither the name of the University nor the names of its contributors
  50  *    may be used to endorse or promote products derived from this software
  51  *    without specific prior written permission.
  52  *
  53  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  54  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  55  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  56  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  57  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  58  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  59  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  60  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  61  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  62  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  63  * SUCH DAMAGE.
  64  *
  65  *      filecore.h              1.0     1998/6/1
  66  */
  67
  68 /*
  69  * Definitions describing Acorn Filecore file system structure, as well as
  70  * the functions necessary to access fields of filecore file system
  71  * structures.
  72  */
  73 #if !defined(_KERNEL)
  74 #error not supposed to be exposed to userland.
  75 #endif
  76
  77
  78 #define FILECORE_BOOTBLOCK_BLKN 6
  79 #define FILECORE_BOOTBLOCK_SIZE 0x200
  80 #define FILECORE_BB_DISCREC     0x1C0
  81 #define FILECORE_DISCREC_SIZE   60
  82 #define FILECORE_DIR_SIZE       2048
  83 #define FILECORE_DIRENT_SIZE    26
  84 #define FILECORE_MAXDIRENTS     77
  85
  86 #define FILECORE_ROOTINO        0xFFFFFFFF
  87 #define FILECORE_INO_MASK       0x00FFFFFF
  88 #define FILECORE_INO_INDEX      24
  89
  90 #define FILECORE_ATTR_READ      1
  91 #define FILECORE_ATTR_WRITE     2
  92 #define FILECORE_ATTR_DIR       8
  93 #define FILECORE_ATTR_OREAD     32
  94 #define FILECORE_ATTR_OWRITE    64
  95
  96 #if 0
  97 #define FILECORE_DEBUG
  98 #define FILECORE_DEBUG_BR
  99 #endif
 100
 101 struct filecore_disc_record {
 102         unsigned log2secsize:8;         /* base 2 log of the sector size */
 103         unsigned secspertrack:8;        /* number of sectors per track */
 104         unsigned heads:8;               /* number of heads */
 105         unsigned density:8;             /* 0: harddisc, else floppy density */
 106         unsigned idlen:8;               /* length of fragment id in bits */
 107         unsigned log2bpmb:8;            /* base 2 log of the bytes per FAU */
 108         unsigned skew:8;                /* track to sector skew */
 109         unsigned bootoption:8;          /* *OPT option */
 110         unsigned lowsector:8;           /* lowest sector id on a track */
 111         unsigned nzones:8;              /* number of zones in the map */
 112         unsigned zone_spare:16;         /* number of non-map bits per zone */
 113         unsigned root;                  /* address of root directory */
 114         unsigned disc_size;             /* disc size in bytes (low word) */
 115         unsigned disc_id:16;            /* disc cycle id */
 116         char     disc_name[10];         /* disc name */
 117         unsigned disc_type;             /* disc type */
 118         unsigned disc_size_2;           /* disc size in bytes (high word) */
 119         unsigned share_size:8;          /* base 2 log sharing granularity */
 120         unsigned big_flag:8;            /* 1 if disc > 512Mb */
 121         char     reserved[18];
 122 } __packed;
 123
 124 struct filecore_direntry {
 125         char     name[10];
 126         unsigned load:32;
 127         unsigned exec:32;
 128         unsigned len:32;
 129         unsigned addr:24;
 130         unsigned attr:8;
 131 } __packed;
 132
 133 struct filecore_dirhead {
 134         unsigned mas_seq:8;
 135         unsigned chkname:32;
 136 } __packed;
 137
 138 struct filecore_dirtail {
 139         unsigned lastmark:8;
 140         unsigned reserved:16;
 141         unsigned parent1:16;
 142         unsigned parent2:8;
 143         char     title[19];
 144         char     name[10];
 145         unsigned mas_seq:8;
 146         unsigned chkname:32;
 147         unsigned checkbyte:8;
 148 } __packed;
 149
 150 #define fcdirhead(dp) ((struct filecore_dirhead *)(dp))
 151 #define fcdirentry(dp,n) (((struct filecore_direntry *)(((char *)(dp))+5))+(n))
 152 #define fcdirtail(dp) ((struct filecore_dirtail *)(((char *)(dp))+2007))