sys/arch/atari/include/disklabel.h

   1 /*      $NetBSD: disklabel.h,v 1.7 2001/07/26 23:07:57 wiz Exp $        */
   2
   3 /*
   4  * Copyright (c) 1995 Leo Weppelman.
   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  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27
  28 #ifndef _MACHINE_DISKLABEL_H_
  29 #define _MACHINE_DISKLABEL_H_
  30
  31 /*
  32  * On a volume, exclusively used by NetBSD, the boot block starts at
  33  * sector 0. To allow shared use of a volume between two or more OS's,
  34  * the vendor specific AHDI format is supported. In this case the boot
  35  * block is located at the start of an AHDI partition. In any case the
  36  * size of the boot block must be at least 8KB.
  37  */
  38 #define BBMINSIZE       8192            /* minimum size of boot block      */
  39 #define LABELSECTOR     0               /* `natural' start of boot block   */
  40 #define LABELOFFSET     516             /* offset of disk label in bytes,
  41                                            relative to start of boot block */
  42 #define LABELMAXSIZE    1020            /* maximum size of disk label, at
  43                                            least (MAXPARTITIONS * 16 + 152)*/
  44 #define MAXPARTITIONS   16              /* max. # of NetBSD partitions     */
  45 #define SWAP_PART       1               /* xx?b is default swap partition  */
  46 #define RAW_PART        2               /* xx?c is raw partition           */
  47
  48 #define MAXAUXROOTS     29              /* max. # of auxiliary root sectors */
  49
  50 struct cpu_disklabel {
  51         u_int           cd_bblock;      /* start of NetBSD boot block      */
  52 #define NO_BOOT_BLOCK   ((u_int)-1)
  53         u_int           cd_label;       /* offset of NetBSD disk label     */
  54 #ifdef DISKLABEL_AHDI
  55         u_int           cd_bslst;       /* start of AHDI bad sector list   */
  56         u_int           cd_bslend;      /* end of AHDI bad sector list     */
  57         u_int           cd_roots[MAXAUXROOTS+1]; /* auxiliary root sectors  */
  58 #endif /* DISKLABEL_AHDI */
  59 };
  60
  61 struct bootblock {
  62         u_int8_t        bb_xxboot[LABELOFFSET - sizeof(u_int32_t)];
  63                                                 /* first-stage boot loader */
  64         u_int32_t       bb_magic;               /* boot block magic number */
  65 #define NBDAMAGIC       0x4e424441 /* 'NBDA' */
  66 #define AHDIMAGIC       0x41484449 /* 'AHDI' */
  67         u_int8_t        bb_label[LABELMAXSIZE]; /* disk pack label         */
  68         u_int8_t        bb_bootxx[BBMINSIZE - LABELOFFSET - LABELMAXSIZE];
  69                                                 /* second-stage boot loader*/
  70 };
  71
  72 struct disklabel;
  73 #define BBGETLABEL(bb, dl)      *(dl) = *((struct disklabel *)(bb)->bb_label)
  74 #define BBSETLABEL(bb, dl)      *((struct disklabel *)(bb)->bb_label) = *(dl)
  75
  76 #endif /* _MACHINE_DISKLABEL_H_ */