sys/arch/mvme68k/include/disklabel.h

   1 /*      $NetBSD: disklabel.h,v 1.9 2005/12/11 12:18:17 christos Exp $   */
   2
   3 /*
   4  * Copyright (c) 1995 Dale Rahn.
   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. The name of the author may not be used to endorse or promote products
  16  *    derived from this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 #ifndef _MACHINE_DISKLABEL_H_
  31 #define _MACHINE_DISKLABEL_H_
  32
  33 /* number of boot pieces , ie xxboot bootxx */
  34 #define NUMBOOT         0
  35
  36 #define LABELSECTOR     0                       /* sector containing label */
  37 #define LABELOFFSET     0                       /* offset of label in sector */
  38 #define MAXPARTITIONS   8                       /* number of partitions */
  39 #define RAW_PART        2                       /* raw partition: xx?c */
  40
  41 /*
  42  * a cpu_disklabel is a disklabel that the bug (prom) can understand
  43  * and live with.   the bug works in terms of 256 byte blocks.   in our
  44  * case the first two bug blocks make up the cpu_disklabel (which is 512
  45  * bytes [i.e. one sector] in length).
  46  *
  47  * we use a fixed layout the BSD disk structure (in 256 byte blocks):
  48  *   block 0  = the volume ID block  (part of cpu_disklabel)
  49  *   block 1  = media configuration area (part of cpu_disklabel)
  50  *   block 2  = start of first level OS bootstrap (continues ...)
  51  *   block 31 = end of OS bootstrap
  52  *   block 32 = BSD filesystem superblock
  53  *
  54  * this gives us 30 blocks (30*256 = 7680 bytes) for the bootstrap's text+data
  55  *
  56  * disksubr.c translates between cpu_disklabel and BSD disklabel.
  57  *
  58  */
  59
  60 struct cpu_disklabel {
  61         /* VID */
  62         u_char  vid_id[4];      /* volume ID */
  63 #define VID_ID          "NBSD"
  64         u_char  vid_0[16];
  65         u_int   vid_oss;        /* starting block # of bootstrap */
  66 #define VID_OSS         2
  67         u_short vid_osl;        /* bootstrap length (30 blocks) */
  68 #define VID_OSL         30
  69         u_char  vid_1[4];
  70         u_short vid_osa_u;      /* bootstrap start address (upper) */
  71         u_short vid_osa_l;      /* bootstrap start address (lower) */
  72 #define VID_OSA         0x3f0000        /* MUST match bootstrap code */
  73 #define VID_OSAU        ((VID_OSA >> 16) & 0xffff)
  74 #define VID_OSAL        (VID_OSA & 0xffff)
  75         u_char  vid_2[2];
  76         u_short partitions;
  77         u_char  vid_vd[16];
  78         u_long  bbsize;
  79         u_long  magic1;         /* 4 */
  80         u_short type;           /* 2 */
  81         u_short subtype;        /* 2 */
  82         u_char  packname[16];   /* 16 */
  83         u_long  flags;          /* 4 */
  84         u_long  drivedata[5];   /* 4 */
  85         u_long  spare[5];       /* 4 */
  86         u_short checksum;       /* 2 */
  87
  88         u_long  secpercyl;      /* 4 */
  89         u_long  secperunit;     /* 4 */
  90         u_long  headswitch;     /* 4 */
  91
  92         u_char  vid_3[4];
  93         u_int   vid_cas;        /* block # of CFG area, hardwired at 1 */
  94 #define VID_CAS         1
  95         u_char  vid_cal;        /* length of CFG area, in blocks (1) */
  96 #define VID_CAL         1
  97         u_char  vid_4_0[3];
  98         u_char  vid_4[64];
  99         u_char  vid_4_1[28];
 100         u_long  sbsize;
 101         u_char  vid_mot[8];     /* must contain "MOTOROLA" */
 102 #define VID_MOT         "MOTOROLA"
 103
 104         /* CFG */
 105         u_char  cfg_0[4];
 106         u_short cfg_atm;
 107         u_short cfg_prm;
 108         u_short cfg_atw;
 109         u_short cfg_rec;        /* block size (256) */
 110 #define CFG_REC         256
 111
 112         u_short sparespertrack;
 113         u_short sparespercyl;
 114         u_long  acylinders;
 115         u_short rpm;
 116         u_short cylskew;
 117
 118         u_char  cfg_spt;
 119         u_char  cfg_hds;
 120         u_short cfg_trk;
 121         u_char  cfg_ilv;
 122         u_char  cfg_sof;
 123         u_short cfg_psm;        /* physical sector size (512) */
 124 #define CFG_PSM         512
 125         u_short cfg_shd;
 126         u_char  cfg_2[2];
 127         u_short cfg_pcom;
 128         u_char  cfg_3;
 129         u_char  cfg_ssr;
 130         u_short cfg_rwcc;
 131         u_short cfg_ecc;
 132         u_short cfg_eatm;
 133         u_short cfg_eprm;
 134         u_short cfg_eatw;
 135         u_char  cfg_gpb1;
 136         u_char  cfg_gpb2;
 137         u_char  cfg_gpb3;
 138         u_char  cfg_gpb4;
 139         u_char  cfg_ssc;
 140         u_char  cfg_runit;
 141         u_short cfg_rsvc1;
 142         u_short cfg_rsvc2;
 143         u_long  magic2;
 144         u_char  cfg_4[192];
 145 } __attribute__((__packed__));
 146 #endif /* _MACHINE_DISKLABEL_H_ */