disklabel.h revision 1.4
1 /* $NetBSD: disklabel.h,v 1.4 1996/05/16 17:52:51 chuck 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Dale Rahn. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #ifndef _MACHINE_DISKLABEL_H_ 34 #define _MACHINE_DISKLABEL_H_ 35 36 /* number of boot pieces , ie xxboot bootxx */ 37 #define NUMBOOT 0 38 39 #define PARTITIONSHIFT 3 /* could also be 4 if you need 16 partitions */ 40 41 #define LABELSECTOR 0 /* sector containing label */ 42 #define LABELOFFSET 0 /* offset of label in sector */ 43 #define MAXPARTITIONS (1 << PARTITIONSHIFT) /* number of partitions */ 44 #define RAW_PART 2 /* raw partition: xx?c */ 45 46 /* 47 * used to encode disk minor numbers 48 * this should probably be moved to sys/disklabel.h 49 */ 50 #define DISKUNIT(dev) (minor(dev) / MAXPARTITIONS) 51 #define DISKPART(dev) (minor(dev) % MAXPARTITIONS) 52 #define MAKEDISKDEV(maj, unit, part) \ 53 (makedev((maj), ((unit) * MAXPARTITIONS) + (part))) 54 55 /* 56 * a cpu_disklabel is a disklabel that the bug (prom) can understand 57 * and live with. the bug works in terms of 256 byte blocks. in our 58 * case the first two bug blocks make up the cpu_disklabel (which is 512 59 * bytes [i.e. one sector] in length). 60 * 61 * we use a fixed layout the BSD disk structure (in 256 byte blocks): 62 * block 0 = the volume ID block (part of cpu_disklabel) 63 * block 1 = media configuration area (part of cpu_disklabel) 64 * block 2 = start of first level OS bootstrap (continues ...) 65 * block 31 = end of OS bootstrap 66 * block 32 = BSD filesystem superblock 67 * 68 * this gives us 30 blocks (30*256 = 7680 bytes) for the bootstrap's text+data 69 * 70 * disksubr.c translates between cpu_disklabel and BSD disklabel. 71 * 72 */ 73 74 struct cpu_disklabel { 75 /* VID */ 76 u_char vid_id[4]; /* volume ID */ 77 #define VID_ID "NBSD" 78 u_char vid_0[16]; 79 u_int vid_oss; /* starting block # of bootstrap */ 80 #define VID_OSS 2 81 u_short vid_osl; /* bootstrap length (30 blocks) */ 82 #define VID_OSL 30 83 u_char vid_1[4]; 84 u_short vid_osa_u; /* bootstrap start address (upper) */ 85 u_short vid_osa_l; /* bootstrap start address (lower) */ 86 #define VID_OSA 0x3f0000 /* MUST match bootstrap code */ 87 #define VID_OSAU ((VID_OSA >> 16) & 0xffff) 88 #define VID_OSAL (VID_OSA & 0xffff) 89 u_char vid_2[2]; 90 u_short partitions; 91 u_char vid_vd[16]; 92 u_long bbsize; 93 u_long magic1; /* 4 */ 94 u_short type; /* 2 */ 95 u_short subtype; /* 2 */ 96 u_char packname[16]; /* 16 */ 97 u_long flags; /* 4 */ 98 u_long drivedata[5]; /* 4 */ 99 u_long spare[5]; /* 4 */ 100 u_short checksum; /* 2 */ 101 102 u_long secpercyl; /* 4 */ 103 u_long secperunit; /* 4 */ 104 u_long headswitch; /* 4 */ 105 106 u_char vid_3[4]; 107 u_int vid_cas; /* block # of CFG area, hardwired at 1 */ 108 #define VID_CAS 1 109 u_char vid_cal; /* length of CFG area, in blocks (1) */ 110 #define VID_CAL 1 111 u_char vid_4_0[3]; 112 u_char vid_4[64]; 113 u_char vid_4_1[28]; 114 u_long sbsize; 115 u_char vid_mot[8]; /* must contain "MOTOROLA" */ 116 #define VID_MOT "MOTOROLA" 117 118 /* CFG */ 119 u_char cfg_0[4]; 120 u_short cfg_atm; 121 u_short cfg_prm; 122 u_short cfg_atw; 123 u_short cfg_rec; /* block size (256) */ 124 #define CFG_REC 256 125 126 u_short sparespertrack; 127 u_short sparespercyl; 128 u_long acylinders; 129 u_short rpm; 130 u_short cylskew; 131 132 u_char cfg_spt; 133 u_char cfg_hds; 134 u_short cfg_trk; 135 u_char cfg_ilv; 136 u_char cfg_sof; 137 u_short cfg_psm; /* physical sector size (512) */ 138 #define CFG_PSM 512 139 u_short cfg_shd; 140 u_char cfg_2[2]; 141 u_short cfg_pcom; 142 u_char cfg_3; 143 u_char cfg_ssr; 144 u_short cfg_rwcc; 145 u_short cfg_ecc; 146 u_short cfg_eatm; 147 u_short cfg_eprm; 148 u_short cfg_eatw; 149 u_char cfg_gpb1; 150 u_char cfg_gpb2; 151 u_char cfg_gpb3; 152 u_char cfg_gpb4; 153 u_char cfg_ssc; 154 u_char cfg_runit; 155 u_short cfg_rsvc1; 156 u_short cfg_rsvc2; 157 u_long magic2; 158 u_char cfg_4[192]; 159 }; 160 #endif _MACHINE_DISKLABEL_H_ 161
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