sys/arch/mipsco/include/disklabel.h

   1 /*      $NetBSD: disklabel.h,v 1.6 2001/07/26 22:47:35 wiz Exp $        */
   2
   3 /*
   4  * Copyright (c) 2000 Wayne Knowles.     All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. All advertising materials mentioning features or use of this software
  15  *    must display the following acknowledgement:
  16  *      This product includes software developed by Christopher G. Demetriou.
  17  * 4. The name of the author may not be used to endorse or promote products
  18  *    derived from this software without specific prior written permission
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  22  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  23  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  24  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  25  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  29  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #ifndef _MACHINE_DISKLABEL_H_
  33 #define _MACHINE_DISKLABEL_H_
  34
  35 /*
  36  * MIPS partition conventions:
  37  *
  38  * Partition 0 - root
  39  * Partition 1 - swap
  40  * Partition 6 - usr
  41  * Partition 7 - volume body
  42  * Partition 8 - volume header
  43  * Partition 10 - whole disk
  44  */
  45
  46 #define LABELSECTOR     1
  47 #define LABELOFFSET     0
  48 #define MAXPARTITIONS   8       /* XXX - NetBSD Compatibility */
  49 #define RAW_PART        2
  50
  51 #define MIPS_PARTITIONS 16      /* Number or partitions for Mips */
  52 #define MIPS_NVOLDIR    15      /* Number of volume directory files */
  53 #define MIPS_VDIRSZ     8       /* File name size in volume directory */
  54 #define MIPS_BFSIZE     16      /* Boot filename size */
  55 #define MIPS_VHSECTOR   0       /* Sector number for MIPS volume header */
  56
  57 /*
  58  * Devices parameters that RISC/os uses for mapping logical block numbers
  59  * to physical device addresses.
  60  */
  61 struct mips_devparams {
  62         u_int8_t        dp_skew;        /* spiral addressing skew */
  63         u_int8_t        dp_gap1;        /* words of 0 before header */
  64         u_int8_t        dp_gap2;        /* words of 0 between hdr and data */
  65         u_int8_t        dp_spare0;      /* spare space */
  66         u_int16_t       dp_cyls;        /* number of cylinders */
  67         u_int16_t       dp_shd0;        /* starting head vol 0 */
  68         u_int16_t       dp_trks0;       /* number of tracks vol 0 */
  69         u_int16_t       dp_shd1;        /* starting head vol 1 */
  70         u_int16_t       dp_trks1;       /* number of tracks vol 1 */
  71         u_int16_t       dp_secs;        /* number of sectors/track */
  72         u_int16_t       dp_secbytes;    /* length of sector in bytes */
  73         u_int16_t       dp_interleave;  /* sector interleave */
  74         int32_t         dp_flags;       /* controller characteristics */
  75         int32_t         dp_datarate;    /* bytes/sec for kernel stats */
  76         int32_t         dp_nretries;    /* max num retries on data error */
  77         int32_t         dp_spare1;      /* spare entries */
  78         int32_t         dp_spare2;
  79         int32_t         dp_spare3;
  80         int32_t         dp_spare4;
  81 } __attribute__((__packed__));
  82
  83 /*
  84  * Volume directory is used as a shortcut to find bootstraps etc
  85  */
  86 struct mips_voldir {                    /* Disk volume directory */
  87         char            vd_name[MIPS_VDIRSZ];
  88         int32_t         vd_lba;
  89         int32_t         vd_len;
  90 };
  91
  92 struct mips_partitions {
  93         int32_t         pt_size;        /* # of logical blocks in partition */
  94         int32_t         pt_offset;      /* first logical block of partition */
  95         int32_t         pt_fstype;
  96 };
  97
  98 /*
  99  * Mips RISC/os compatible volume header and partition table
 100  *
 101  * 1 sector (512 bytes) in size, and normally copied to the first sector
 102  * and cylinder of every track on a disk.
 103  */
 104 struct mips_volheader {
 105         u_int32_t       vh_magic;
 106 #define MIPS_VHMAGIC    0xbe5a941
 107         int16_t         vh_root;                /* Root partition number */
 108         int16_t         vh_swap;                /* Swap partition number */
 109         char            bootfile[MIPS_BFSIZE];  /* default file to boot */
 110         struct mips_devparams   vh_dp;          /* disk device parameters */
 111         struct mips_voldir      vh_voldir[MIPS_NVOLDIR];
 112         struct mips_partitions  vh_part[MIPS_PARTITIONS];
 113         int32_t         vh_cksum;
 114         int32_t         vh_pad;
 115 } __attribute__((__packed__));
 116
 117 #define MIPS_FS_VOLHDR  0
 118 #define MIPS_FS_TRKREPL 1
 119 #define MIPS_FS_SECREPL 2
 120 #define MIPS_FS_RAW     3
 121 #define MIPS_FS_BSD     4
 122 #define MIPS_FS_BSD42   4
 123 #define MIPS_FS_SYSV    5
 124 #define MIPS_FS_VOLUME  6 /* Entire volume */
 125
 126 /* Just a dummy */
 127 struct cpu_disklabel {
 128         int     cd_dummy;                       /* must have one element. */
 129 };
 130
 131 #endif /* _MACHINE_DISKLABEL_H_ */