sys/arch/atari/stand/tostools/libtos/ahdi.h

   1 /*
   2  * Copyright (c) 1995 Leo Weppelman.
   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  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  15  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  16  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  17  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  18  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  19  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  20  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  21  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #ifndef AHDI_H
  27 #define AHDI_H
  28
  29 #define AHDI_BSIZE      512             /* AHDI blocksize               */
  30 #define AHDI_BBLOCK     0               /* AHDI bootblock (root sector) */
  31
  32 /*
  33  * Various `well known' AHDI partition identifiers.
  34  */
  35 #define AHDI_MKPID(x,y,z)       (   ((u_int32_t)(x) << 16)      \
  36                                   | ((u_int32_t)(y) << 8)       \
  37                                   | ((u_int32_t)(z))            \
  38                                 )
  39 #define AHDI_PID_XGM    AHDI_MKPID('X','G','M')
  40 #define AHDI_PID_GEM    AHDI_MKPID('G','E','M')
  41 #define AHDI_PID_BGM    AHDI_MKPID('B','G','M')
  42 #define AHDI_PID_RAW    AHDI_MKPID('R','A','W')
  43 #define AHDI_PID_SWP    AHDI_MKPID('S','W','P')
  44 #define AHDI_PID_NBD    AHDI_MKPID('N','B','D')
  45 #define AHDI_PID_NBR    AHDI_MKPID('N','B','R')
  46 #define AHDI_PID_NBS    AHDI_MKPID('N','B','S')
  47 #define AHDI_PID_NBU    AHDI_MKPID('N','B','U')
  48
  49 /*
  50  * Format of AHDI boot block.
  51  */
  52 #define AHDI_MAXRPD     4               /* max. # of partition descriptors */
  53                                         /* in an AHDI bootblock (aka root) */
  54 #define AHDI_MAXARPD    2               /* max. # of partition descriptors */
  55
  56 /*
  57  * On-disk representation of the AHDI disklabel.
  58  */
  59 struct ahdi_part {
  60         u_int8_t        ap_flg;         /* bit 0 is in-use flag            */
  61         u_int8_t        ap_id[3];       /* id: GEM, BGM, XGM, UNX, MIX     */
  62         u_int32_t       ap_st;          /* block where partition starts    */
  63         u_int32_t       ap_size;        /* partition size in blocks        */
  64 };
  65
  66 struct ahdi_root {
  67         u_int8_t         ar_fill[0x1c2];/* filler, can be boot code        */
  68         u_int32_t        ar_hdsize;     /* size of entire volume in blocks */
  69         struct ahdi_part ar_parts[AHDI_MAXRPD]; /* root partition table    */
  70         u_int32_t        ar_bslst;      /* start of bad-sector list        */
  71         u_int32_t        ar_bslsize;    /* # of blocks in bad-sector list  */
  72         u_int16_t        ar_checksum;
  73 };
  74
  75 /*
  76  * Partition table representation as generated by ahdi_getparts():
  77  */
  78 typedef struct {
  79         char    id[4];
  80         u_int   start;
  81         u_int   end;
  82         u_int   rsec;
  83         u_int   rent;
  84         int     mod;
  85 } part_t;
  86
  87 typedef struct {
  88         int     nparts;
  89         part_t  *parts;
  90 } ptable_t;
  91
  92 /*
  93  * Functions exported from ahdi.c
  94  */
  95 EXTERN u_int ahdi_getparts PROTO((disk_t *, ptable_t *, u_int, u_int));
  96 #endif /*  AHDI_H */