sys/arch/atari/include/ahdilabel.h

   1 /*      $NetBSD: ahdilabel.h,v 1.3 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_AHDILABEL_H_
  29 #define _MACHINE_AHDILABEL_H_
  30
  31 #define AHDI_BSIZE      512             /* AHDI blocksize               */
  32 #define AHDI_BBLOCK     0               /* AHDI bootblock (root sector) */
  33 #define AHDI_MAXROOTS   (MAXAUXROOTS)   /* max. # of AHDI rootsectors   */
  34 #define AHDI_MAXPARTS   (AHDI_MAXROOTS+3) /* max. # of AHDI partitions  */
  35
  36 /*
  37  * Various `well known' AHDI partition identifiers.
  38  */
  39 #define AHDI_MKPID(x,y,z)       (   ((u_int32_t)(x) << 16)      \
  40                                   | ((u_int32_t)(y) << 8)       \
  41                                   | ((u_int32_t)(z))            \
  42                                 )
  43 #define AHDI_PID_XGM    AHDI_MKPID('X','G','M')
  44 #define AHDI_PID_GEM    AHDI_MKPID('G','E','M')
  45 #define AHDI_PID_BGM    AHDI_MKPID('B','G','M')
  46 #define AHDI_PID_RAW    AHDI_MKPID('R','A','W')
  47 #define AHDI_PID_SWP    AHDI_MKPID('S','W','P')
  48 #define AHDI_PID_NBD    AHDI_MKPID('N','B','D')
  49 #define AHDI_PID_NBR    AHDI_MKPID('N','B','R')
  50 #define AHDI_PID_NBS    AHDI_MKPID('N','B','S')
  51 #define AHDI_PID_NBU    AHDI_MKPID('N','B','U')
  52
  53 /*
  54  * Format of AHDI boot block.
  55  */
  56 #define AHDI_MAXRPD     4               /* max. # of partition descriptors */
  57                                         /* in an AHDI bootblock (aka root) */
  58 #define AHDI_MAXARPD    2               /* max. # of partition descriptors */
  59                                         /* in an AHDI auxiliary root sector */
  60 struct ahdi_part {
  61         u_int8_t        ap_flg;         /* bit 0 is in-use flag            */
  62         u_int8_t        ap_id[3];       /* id: GEM, BGM, XGM, UNX, MIX     */
  63         u_int32_t       ap_st;          /* block where partition starts    */
  64         u_int32_t       ap_size;        /* partition size in blocks        */
  65 } __attribute__((__packed__));
  66 #define ap_end  ap_size /* in the in-core copy, store end instead of size  */
  67
  68 struct ahdi_root {
  69         u_int8_t         ar_fill[0x1c2];/* filler, can be boot code        */
  70         u_int32_t        ar_hdsize;     /* size of entire volume in blocks */
  71         struct ahdi_part ar_parts[AHDI_MAXRPD]; /* root partition table    */
  72         u_int32_t        ar_bslst;      /* start of bad-sector list        */
  73         u_int32_t        ar_bslsize;    /* # of blocks in bad-sector list  */
  74         u_int16_t        ar_checksum;
  75 } __attribute__((__packed__));
  76
  77 /*
  78  * AHDI partition table.
  79  */
  80 #ifdef _KERNEL
  81 struct ahdi_ptbl {
  82         struct cpu_disklabel    *at_cdl;
  83         u_int                   at_hdsize;   /* size of volume in blocks   */
  84         u_int                   at_nroots;   /* # of auxiliary root sectors */
  85         u_int                   at_nparts;   /* # of AHDI partitions       */
  86         struct ahdi_part        at_parts[AHDI_MAXPARTS];
  87 };
  88 #define at_bblock       at_cdl->cd_bblock
  89 #define at_label        at_cdl->cd_label
  90 #define at_bslst        at_cdl->cd_bslst
  91 #define at_bslend       at_cdl->cd_bslend
  92 #define at_roots        at_cdl->cd_roots
  93 #endif /* _KERNEL */
  94
  95 #endif /* _MACHINE_AHDILABEL_H_ */