1 /* $NetBSD: disklabel.h,v 1.2 2013/08/22 00:25:35 matt 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 LABELUSESMBR 1 /* no MBR partitionning */ 37 #define LABELSECTOR 1 /* sector containing label */ 38 #define LABELOFFSET 0 /* offset of label in sector */ 39 #define MAXPARTITIONS 16 /* number of partitions */ 40 #define RAW_PART 2 /* raw partition: xx?c */ 41 42 /* 43 * a cpu_disklabel is a disklabel that the bug (prom) can understand 44 * and live with. the bug works in terms of 256 byte blocks. in our 45 * case the first two bug blocks make up the cpu_disklabel (which is 512 46 * bytes [i.e. one sector] in length). 47 * 48 * we use a fixed layout the BSD disk structure (in 256 byte blocks): 49 * block 0 = the volume ID block (part of cpu_disklabel) 50 * block 1 = media configuration area (part of cpu_disklabel) 51 * block 2 = start of first level OS bootstrap (continues ...) 52 * block 31 = end of OS bootstrap 53 * block 32 = BSD filesystem superblock 54 * 55 * this gives us 30 blocks (30*256 = 7680 bytes) for the bootstrap's text+data 56 * 57 * disksubr.c translates between cpu_disklabel and BSD disklabel. 58 * 59 */ 60 61 struct cpu_disklabel { 62 /* VID */ 63 u_char vid_id[4]; /* volume ID */ 64 #define VID_ID "NBSD" 65 u_char vid_0[16]; 66 u_int vid_oss; /* starting block # of bootstrap */ 67 #define VID_OSS 2 68 u_short vid_osl; /* bootstrap length (30 blocks) */ 69 #define VID_OSL 30 70 u_char vid_1[4]; 71 u_short vid_osa_u; /* bootstrap start address (upper) */ 72 u_short vid_osa_l; /* bootstrap start address (lower) */ 73 #define VID_OSA 0x3f0000 /* MUST match bootstrap code */ 74 #define VID_OSAU ((VID_OSA >> 16) & 0xffff) 75 #define VID_OSAL (VID_OSA & 0xffff) 76 u_char vid_2[2]; 77 u_short partitions; 78 u_char vid_vd[16]; 79 u_long bbsize; 80 u_long magic1; /* 4 */ 81 u_short type; /* 2 */ 82 u_short subtype; /* 2 */ 83 u_char packname[16]; /* 16 */ 84 u_long flags; /* 4 */ 85 u_long drivedata[5]; /* 4 */ 86 u_long spare[5]; /* 4 */ 87 u_short checksum; /* 2 */ 88 89 u_long secpercyl; /* 4 */ 90 u_long secperunit; /* 4 */ 91 u_long headswitch; /* 4 */ 92 93 u_char vid_3[4]; 94 u_int vid_cas; /* block # of CFG area, hardwired at 1 */ 95 #define VID_CAS 1 96 u_char vid_cal; /* length of CFG area, in blocks (1) */ 97 #define VID_CAL 1 98 u_char vid_4_0[3]; 99 u_char vid_4[64]; 100 u_char vid_4_1[28]; 101 u_long sbsize; 102 u_char vid_mot[8]; /* must contain "MOTOROLA" */ 103 #define VID_MOT "MOTOROLA" 104 105 /* CFG */ 106 u_char cfg_0[4]; 107 u_short cfg_atm; 108 u_short cfg_prm; 109 u_short cfg_atw; 110 u_short cfg_rec; /* block size (256) */ 111 #define CFG_REC 256 112 113 u_short sparespertrack; 114 u_short sparespercyl; 115 u_long acylinders; 116 u_short rpm; 117 u_short cylskew; 118 119 u_char cfg_spt; 120 u_char cfg_hds; 121 u_short cfg_trk; 122 u_char cfg_ilv; 123 u_char cfg_sof; 124 u_short cfg_psm; /* physical sector size (512) */ 125 #define CFG_PSM 512 126 u_short cfg_shd; 127 u_char cfg_2[2]; 128 u_short cfg_pcom; 129 u_char cfg_3; 130 u_char cfg_ssr; 131 u_short cfg_rwcc; 132 u_short cfg_ecc; 133 u_short cfg_eatm; 134 u_short cfg_eprm; 135 u_short cfg_eatw; 136 u_char cfg_gpb1; 137 u_char cfg_gpb2; 138 u_char cfg_gpb3; 139 u_char cfg_gpb4; 140 u_char cfg_ssc; 141 u_char cfg_runit; 142 u_short cfg_rsvc1; 143 u_short cfg_rsvc2; 144 u_long magic2; 145 u_char cfg_4[192]; 146 } __attribute__((__packed__)); 147 #endif /* _MACHINE_DISKLABEL_H_ */ 148