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filecore.h revision 1.1 
      1 /*	$NetBSD: filecore.h,v 1.1 2002/12/23 17:30:40 jdolecek Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1998 Andrew McMurry
      5  * Copyright (c) 1994 The Regents of the University of California.
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by the University of
     19  *	California, Berkeley and its contributors.
     20  * 4. Neither the name of the University nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  *
     36  *	filecore.h		1.0	1998/6/1
     37  */
     38 
     39 /*
     40  * Definitions describing Acorn Filecore file system structure, as well as
     41  * the functions necessary to access fields of filecore file system
     42  * structures.
     43  */
     44 
     45 #define FILECORE_BOOTBLOCK_BLKN	6
     46 #define FILECORE_BOOTBLOCK_SIZE	0x200
     47 #define FILECORE_BB_DISCREC	0x1C0
     48 #define FILECORE_DISCREC_SIZE	60
     49 #define FILECORE_DIR_SIZE	2048
     50 #define FILECORE_DIRENT_SIZE	26
     51 #define FILECORE_MAXDIRENTS	77
     52 
     53 #define FILECORE_ROOTINO	0xFFFFFFFF
     54 #define FILECORE_INO_MASK	0x00FFFFFF
     55 #define FILECORE_INO_INDEX	24
     56 
     57 #define FILECORE_ATTR_READ	1
     58 #define FILECORE_ATTR_WRITE	2
     59 #define FILECORE_ATTR_DIR	8
     60 #define FILECORE_ATTR_OREAD	32
     61 #define FILECORE_ATTR_OWRITE	64
     62 
     63 #if 0
     64 #define FILECORE_DEBUG
     65 #define FILECORE_DEBUG_BR
     66 #endif
     67 
     68 struct filecore_disc_record {
     69 	unsigned log2secsize:8;		/* base 2 log of the sector size */
     70 	unsigned secspertrack:8;	/* number of sectors per track */
     71 	unsigned heads:8;		/* number of heads */
     72 	unsigned density:8;		/* 0: harddisc, else floppy density */
     73 	unsigned idlen:8;		/* length of fragment id in bits */
     74 	unsigned log2bpmb:8;		/* base 2 log of the bytes per FAU */
     75 	unsigned skew:8;		/* track to sector skew */
     76 	unsigned bootoption:8;		/* *OPT option */
     77 	unsigned lowsector:8;		/* lowest sector id on a track */
     78 	unsigned nzones:8;		/* number of zones in the map */
     79 	unsigned zone_spare:16;		/* number of non-map bits per zone */
     80 	unsigned root;			/* address of root directory */
     81 	unsigned disc_size;		/* disc size in bytes (low word) */
     82 	unsigned disc_id:16;		/* disc cycle id */
     83 	char	 disc_name[10];		/* disc name */
     84 	unsigned disc_type;		/* disc type */
     85 	unsigned disc_size_2;		/* disc size in bytes (high word) */
     86 	unsigned share_size:8;		/* base 2 log sharing granularity */
     87 	unsigned big_flag:8;		/* 1 if disc > 512Mb */
     88 	char	 reserved[18];
     89 };
     90 
     91 struct filecore_direntry {
     92 	char	 name[10];
     93 	unsigned load:32;
     94 	unsigned exec:32;
     95 	unsigned len:32;
     96 	unsigned addr:24;
     97 	unsigned attr:8;
     98 };
     99 
    100 struct filecore_dirhead {
    101 	unsigned mas_seq:8;
    102 	unsigned chkname:32;
    103 };
    104 
    105 struct filecore_dirtail {
    106 	unsigned lastmark:8;
    107 	unsigned reserved:16;
    108 	unsigned parent1:16;
    109 	unsigned parent2:8;
    110 	char	 title[19];
    111 	char	 name[10];
    112 	unsigned mas_seq:8;
    113 	unsigned chkname:32;
    114 	unsigned checkbyte:8;
    115 };
    116 
    117 #define fcdirhead(dp) ((struct filecore_dirhead *)(dp))
    118 #define fcdirentry(dp,n) (((struct filecore_direntry *)(((char *)(dp))+5))+(n))
    119 #define fcdirtail(dp) ((struct filecore_dirtail *)(((char *)(dp))+2007))
    120