usr/src/lib/libbc/inc/include/sun/dklabel.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 #pragma ident   "%Z%%M% %I%     %E% SMI"
  23
  24 /*
  25  * Copyright (c) 1987 by Sun Microsystems, Inc.
  26  */
  27
  28 #ifndef _sun_dklabel_h
  29 #define _sun_dklabel_h
  30
  31 /*
  32  * Miscellaneous defines
  33  */
  34 #define DKL_MAGIC       0xDABE  /* magic number */
  35 #define FKL_MAGIC       0xff    /* magic number for DOS floppies */
  36 #define NDKMAP  8               /* # of logical partitions */
  37
  38 /*
  39  * Format of a Sun SMD disk label.
  40  * Resides in cylinder 0, head 0, sector 0.
  41  *
  42  * sizeof (struct dk_label) should be 512 (sector size)
  43  */
  44 struct dk_label {
  45         char    dkl_asciilabel[128];    /* for compatibility */
  46         char    dkl_pad[512-(128+NDKMAP*8+14*2)];
  47         unsigned short  dkl_rpm;        /* rotations per minute */
  48         unsigned short  dkl_pcyl;       /* # physical cylinders */
  49         unsigned short  dkl_apc;        /* alternates per cylinder */
  50         unsigned short  dkl_obs1;       /* obsolete */
  51         unsigned short  dkl_obs2;       /* obsolete */
  52         unsigned short  dkl_intrlv;     /* interleave factor */
  53         unsigned short  dkl_ncyl;       /* # of data cylinders */
  54         unsigned short  dkl_acyl;       /* # of alternate cylinders */
  55         unsigned short  dkl_nhead;      /* # of heads in this partition */
  56         unsigned short  dkl_nsect;      /* # of 512 byte sectors per track */
  57         unsigned short  dkl_obs3;       /* obsolete */
  58         unsigned short  dkl_obs4;       /* obsolete */
  59         /* */
  60         struct dk_map {                 /* logical partitions */
  61                 daddr_t dkl_cylno;      /* starting cylinder */
  62                 daddr_t dkl_nblk;       /* number of blocks */
  63         } dkl_map[NDKMAP];
  64         unsigned short  dkl_magic;      /* identifies this label format */
  65         unsigned short  dkl_cksum;      /* xor checksum of sector */
  66 };
  67
  68 /*
  69  * These defines are for historic compatibility with old drivers.
  70  */
  71 #define dkl_gap1        dkl_obs1        /* used to be gap1 */
  72 #define dkl_gap2        dkl_obs2        /* used to be gap2 */
  73 #define dkl_bhead       dkl_obs3        /* used to be label head offset */
  74 #define dkl_ppart       dkl_obs4        /* used to by physical partition */
  75
  76 struct fk_label {                       /* DOS floppy label */
  77         u_char fkl_type;
  78         u_char fkl_magich;
  79         u_char fkl_magicl;
  80         u_char filler;
  81 };
  82
  83 #endif /*!_sun_dklabel_h*/