disklabel.h revision 1.6
1 /* $NetBSD: disklabel.h,v 1.6 2000/12/01 00:02:22 scw 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 * a cpu_disklabel is a disklabel that the bug (prom) can understand 48 * and live with. the bug works in terms of 256 byte blocks. in our 49 * case the first two bug blocks make up the cpu_disklabel (which is 512 50 * bytes [i.e. one sector] in length). 51 * 52 * we use a fixed layout the BSD disk structure (in 256 byte blocks): 53 * block 0 = the volume ID block (part of cpu_disklabel) 54 * block 1 = media configuration area (part of cpu_disklabel) 55 * block 2 = start of first level OS bootstrap (continues ...) 56 * block 31 = end of OS bootstrap 57 * block 32 = BSD filesystem superblock 58 * 59 * this gives us 30 blocks (30*256 = 7680 bytes) for the bootstrap's text+data 60 * 61 * disksubr.c translates between cpu_disklabel and BSD disklabel. 62 * 63 */ 64 65 struct cpu_disklabel { 66 /* VID */ 67 u_char vid_id[4]; /* volume ID */ 68 #define VID_ID "NBSD" 69 u_char vid_0[16]; 70 u_int vid_oss; /* starting block # of bootstrap */ 71 #define VID_OSS 2 72 u_short vid_osl; /* bootstrap length (30 blocks) */ 73 #define VID_OSL 30 74 u_char vid_1[4]; 75 u_short vid_osa_u; /* bootstrap start address (upper) */ 76 u_short vid_osa_l; /* bootstrap start address (lower) */ 77 #define VID_OSA 0x3f0000 /* MUST match bootstrap code */ 78 #define VID_OSAU ((VID_OSA >> 16) & 0xffff) 79 #define VID_OSAL (VID_OSA & 0xffff) 80 u_char vid_2[2]; 81 u_short partitions; 82 u_char vid_vd[16]; 83 u_long bbsize; 84 u_long magic1; /* 4 */ 85 u_short type; /* 2 */ 86 u_short subtype; /* 2 */ 87 u_char packname[16]; /* 16 */ 88 u_long flags; /* 4 */ 89 u_long drivedata[5]; /* 4 */ 90 u_long spare[5]; /* 4 */ 91 u_short checksum; /* 2 */ 92 93 u_long secpercyl; /* 4 */ 94 u_long secperunit; /* 4 */ 95 u_long headswitch; /* 4 */ 96 97 u_char vid_3[4]; 98 u_int vid_cas; /* block # of CFG area, hardwired at 1 */ 99 #define VID_CAS 1 100 u_char vid_cal; /* length of CFG area, in blocks (1) */ 101 #define VID_CAL 1 102 u_char vid_4_0[3]; 103 u_char vid_4[64]; 104 u_char vid_4_1[28]; 105 u_long sbsize; 106 u_char vid_mot[8]; /* must contain "MOTOROLA" */ 107 #define VID_MOT "MOTOROLA" 108 109 /* CFG */ 110 u_char cfg_0[4]; 111 u_short cfg_atm; 112 u_short cfg_prm; 113 u_short cfg_atw; 114 u_short cfg_rec; /* block size (256) */ 115 #define CFG_REC 256 116 117 u_short sparespertrack; 118 u_short sparespercyl; 119 u_long acylinders; 120 u_short rpm; 121 u_short cylskew; 122 123 u_char cfg_spt; 124 u_char cfg_hds; 125 u_short cfg_trk; 126 u_char cfg_ilv; 127 u_char cfg_sof; 128 u_short cfg_psm; /* physical sector size (512) */ 129 #define CFG_PSM 512 130 u_short cfg_shd; 131 u_char cfg_2[2]; 132 u_short cfg_pcom; 133 u_char cfg_3; 134 u_char cfg_ssr; 135 u_short cfg_rwcc; 136 u_short cfg_ecc; 137 u_short cfg_eatm; 138 u_short cfg_eprm; 139 u_short cfg_eatw; 140 u_char cfg_gpb1; 141 u_char cfg_gpb2; 142 u_char cfg_gpb3; 143 u_char cfg_gpb4; 144 u_char cfg_ssc; 145 u_char cfg_runit; 146 u_short cfg_rsvc1; 147 u_short cfg_rsvc2; 148 u_long magic2; 149 u_char cfg_4[192]; 150 } __attribute__((__packed__)); 151 #endif _MACHINE_DISKLABEL_H_ 152
Indexes created Sun Sep 28 12:09:53 GMT 2025