1 /* $NetBSD: disklabel.h,v 1.10 2009/10/23 03:25:36 snj 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. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #ifndef _MACHINE_DISKLABEL_H_ 31 #define _MACHINE_DISKLABEL_H_ 32 33 /* number of boot pieces , ie xxboot bootxx */ 34 #define NUMBOOT 0 35 36 #define LABELSECTOR 0 /* sector containing label */ 37 #define LABELOFFSET 0 /* offset of label in sector */ 38 #define MAXPARTITIONS 8 /* number of partitions */ 39 #define RAW_PART 2 /* raw partition: xx?c */ 40 41 /* 42 * a cpu_disklabel is a disklabel that the bug (prom) can understand 43 * and live with. the bug works in terms of 256 byte blocks. in our 44 * case the first two bug blocks make up the cpu_disklabel (which is 512 45 * bytes [i.e. one sector] in length). 46 * 47 * we use a fixed layout the BSD disk structure (in 256 byte blocks): 48 * block 0 = the volume ID block (part of cpu_disklabel) 49 * block 1 = media configuration area (part of cpu_disklabel) 50 * block 2 = start of first level OS bootstrap (continues ...) 51 * block 31 = end of OS bootstrap 52 * block 32 = BSD filesystem superblock 53 * 54 * this gives us 30 blocks (30*256 = 7680 bytes) for the bootstrap's text+data 55 * 56 * disksubr.c translates between cpu_disklabel and BSD disklabel. 57 * 58 */ 59 60 struct cpu_disklabel { 61 /* VID */ 62 u_char vid_id[4]; /* volume ID */ 63 #define VID_ID "NBSD" 64 u_char vid_0[16]; 65 u_int vid_oss; /* starting block # of bootstrap */ 66 #define VID_OSS 2 67 u_short vid_osl; /* bootstrap length (30 blocks) */ 68 #define VID_OSL 30 69 u_char vid_1[4]; 70 u_short vid_osa_u; /* bootstrap start address (upper) */ 71 u_short vid_osa_l; /* bootstrap start address (lower) */ 72 #define VID_OSA 0x3f0000 /* MUST match bootstrap code */ 73 #define VID_OSAU ((VID_OSA >> 16) & 0xffff) 74 #define VID_OSAL (VID_OSA & 0xffff) 75 u_char vid_2[2]; 76 u_short partitions; 77 u_char vid_vd[16]; 78 u_long bbsize; 79 u_long magic1; /* 4 */ 80 u_short type; /* 2 */ 81 u_short subtype; /* 2 */ 82 u_char packname[16]; /* 16 */ 83 u_long flags; /* 4 */ 84 u_long drivedata[5]; /* 4 */ 85 u_long spare[5]; /* 4 */ 86 u_short checksum; /* 2 */ 87 88 u_long secpercyl; /* 4 */ 89 u_long secperunit; /* 4 */ 90 u_long headswitch; /* 4 */ 91 92 u_char vid_3[4]; 93 u_int vid_cas; /* block # of CFG area, hardwired at 1 */ 94 #define VID_CAS 1 95 u_char vid_cal; /* length of CFG area, in blocks (1) */ 96 #define VID_CAL 1 97 u_char vid_4_0[3]; 98 u_char vid_4[64]; 99 u_char vid_4_1[28]; 100 u_long sbsize; 101 u_char vid_mot[8]; /* must contain "MOTOROLA" */ 102 #define VID_MOT "MOTOROLA" 103 104 /* CFG */ 105 u_char cfg_0[4]; 106 u_short cfg_atm; 107 u_short cfg_prm; 108 u_short cfg_atw; 109 u_short cfg_rec; /* block size (256) */ 110 #define CFG_REC 256 111 112 u_short sparespertrack; 113 u_short sparespercyl; 114 u_long acylinders; 115 u_short rpm; 116 u_short cylskew; 117 118 u_char cfg_spt; 119 u_char cfg_hds; 120 u_short cfg_trk; 121 u_char cfg_ilv; 122 u_char cfg_sof; 123 u_short cfg_psm; /* physical sector size (512) */ 124 #define CFG_PSM 512 125 u_short cfg_shd; 126 u_char cfg_2[2]; 127 u_short cfg_pcom; 128 u_char cfg_3; 129 u_char cfg_ssr; 130 u_short cfg_rwcc; 131 u_short cfg_ecc; 132 u_short cfg_eatm; 133 u_short cfg_eprm; 134 u_short cfg_eatw; 135 u_char cfg_gpb1; 136 u_char cfg_gpb2; 137 u_char cfg_gpb3; 138 u_char cfg_gpb4; 139 u_char cfg_ssc; 140 u_char cfg_runit; 141 u_short cfg_rsvc1; 142 u_short cfg_rsvc2; 143 u_long magic2; 144 u_char cfg_4[192]; 145 } __attribute__((__packed__)); 146 #endif /* _MACHINE_DISKLABEL_H_ */ 147