dec_boot.h revision 1.4
1 /* $NetBSD: dec_boot.h,v 1.4 2002/04/03 04:05:05 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Ralph Campbell. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)dec_boot.h 8.1 (Berkeley) 6/10/93 39 * 40 * from: Header: /sprite/src/kernel/dev/RCS/devDiskLabel.h, 41 * v 9.4 90/03/01 12:22:36 jhh Exp SPRITE (Berkeley) 42 */ 43 44 /* 45 * Copyright (c) 1994, 1999 Christopher G. Demetriou 46 * All rights reserved. 47 * 48 * Redistribution and use in source and binary forms, with or without 49 * modification, are permitted provided that the following conditions 50 * are met: 51 * 1. Redistributions of source code must retain the above copyright 52 * notice, this list of conditions and the following disclaimer. 53 * 2. Redistributions in binary form must reproduce the above copyright 54 * notice, this list of conditions and the following disclaimer in the 55 * documentation and/or other materials provided with the distribution. 56 * 3. All advertising materials mentioning features or use of this software 57 * must display the following acknowledgement: 58 * This product includes software developed by Christopher G. Demetriou 59 * for the NetBSD Project. 60 * 4. The name of the author may not be used to endorse or promote products 61 * derived from this software without specific prior written permission 62 * 63 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 64 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 65 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 66 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 67 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 68 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 69 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 70 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 71 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 72 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 73 */ 74 75 #ifndef _DEV_DEC_DEC_BOOT_H_ 76 #define _DEV_DEC_DEC_BOOT_H_ 77 78 /* 79 * Boot block information on the 0th sector. 80 * The boot program is stored in sequences of contiguous blocks. 81 * 82 * NOTE: The standard disk label offset is 64 which is 83 * after the boot information expected by the PROM boot loader. 84 */ 85 86 /* 87 * Alpha (disk, but also tape) Boot Block. 88 * 89 * See Section (III) 3.6.1 of the Alpha Architecture Reference Manual. 90 */ 91 92 struct alpha_boot_block { 93 u_int64_t bb_data[63]; /* data (disklabel, also as below) */ 94 u_int64_t bb_cksum; /* checksum of the boot block, 95 * taken as u_int64_t's 96 */ 97 }; 98 #define bb_secsize bb_data[60] /* secondary size (blocks) */ 99 #define bb_secstart bb_data[61] /* secondary start (blocks) */ 100 #define bb_flags bb_data[62] /* unknown flags (set to zero) */ 101 102 #define ALPHA_BOOT_BLOCK_OFFSET 0 /* offset of boot block. */ 103 #define ALPHA_BOOT_BLOCK_BLOCKSIZE 512 /* block size for sector 104 * size/start, and for boot 105 * block itself. 106 */ 107 108 #define ALPHA_BOOT_BLOCK_CKSUM(bb,cksum) \ 109 do { \ 110 const struct alpha_boot_block *_bb = (bb); \ 111 u_int64_t _cksum; \ 112 int _i; \ 113 \ 114 _cksum = 0; \ 115 for (_i = 0; \ 116 _i < (sizeof _bb->bb_data / sizeof _bb->bb_data[0]); \ 117 _i++) \ 118 _cksum += _bb->bb_data[_i]; \ 119 *(cksum) = _cksum; \ 120 } while (0) 121 122 123 /* 124 * PMAX (DECstation / MIPS) boot block information 125 */ 126 127 /* 128 * If mode is 0, there is just one sequence of blocks and one Dec_BootMap 129 * is used. If mode is 1, there are multiple sequences of blocks 130 * and multiple Dec_BootMaps are used, the last with numBlocks = 0. 131 */ 132 struct pmax_boot_map { 133 int32_t num_blocks; /* Number of blocks to read. */ 134 int32_t start_block; /* Starting block on disk. */ 135 }; 136 137 /* 138 * This is the structure of a disk or tape boot block. The boot_map 139 * can either be a single boot count and start block (contiguous mode) 140 * or a list of up to 61 (to fill a 512 byte sector) block count and 141 * start block pairs. Under NetBSD, contiguous mode is always used. 142 */ 143 struct pmax_boot_block { 144 u_int8_t pad[8]; 145 int32_t magic; /* PMAX_BOOT_MAGIC */ 146 int32_t mode; /* Mode for boot info. */ 147 u_int32_t load_addr; /* Address to start loading. */ 148 u_int32_t exec_addr; /* Address to start execing. */ 149 struct pmax_boot_map map[61]; /* boot program section(s). */ 150 } __attribute__((__packed__)); 151 152 #define PMAX_BOOT_MAGIC 0x0002757a 153 #define PMAX_BOOTMODE_CONTIGUOUS 0 154 #define PMAX_BOOTMODE_SCATTERED 1 155 156 #define PMAX_BOOT_BLOCK_OFFSET 0 157 #define PMAX_BOOT_BLOCK_BLOCKSIZE 512 158 159 160 /* 161 * VAX boot block information 162 */ 163 struct vax_boot_block { 164 /* Note that these don't overlap any of the pmax boot block 165 */ 166 u_int8_t pad0[2]; 167 u_int8_t bb_id_offset; /* offset in words to id (magic1)*/ 168 u_int8_t bb_mbone; /* must be one */ 169 u_int16_t bb_lbn_hi; /* lbn (hi word) of bootstrap */ 170 u_int16_t bb_lbn_low; /* lbn (low word) of bootstrap */ 171 u_int8_t pad1[332]; 172 173 /* The rest of these fields are identification area and describe 174 * the secondary block for uVAX VMB. 175 */ 176 u_int8_t bb_magic1; /* magic number */ 177 u_int8_t bb_mbz1; /* must be zero */ 178 u_int8_t bb_pad1; /* any value */ 179 u_int8_t bb_sum1; /* ~(magic1 + mbz1 + pad1) */ 180 181 u_int8_t bb_mbz2; /* must be zero */ 182 u_int8_t bb_volinfo; /* volinfo */ 183 u_int8_t bb_pad2a; /* any value */ 184 u_int8_t bb_pad2b; /* any value */ 185 186 u_int32_t bb_size; /* size in blocks of bootstrap */ 187 u_int32_t bb_load; /* load offset to bootstrap */ 188 u_int32_t bb_entry; /* byte offset in bootstrap */ 189 u_int32_t bb_sum3; /* sum of previous 3 fields */ 190 191 /* The rest is unused. 192 */ 193 u_int8_t pad2[148]; 194 } __attribute__((__packed__)); 195 196 #define VAX_BOOT_MAGIC1 0x18 /* size of BB info? */ 197 #define VAX_BOOT_VOLINFO_NONE 0x00 /* no special info */ 198 #define VAX_BOOT_VOLINFO_SS 0x01 /* single sided */ 199 #define VAX_BOOT_VOLINFO_DS 0x81 /* double sided */ 200 201 #define VAX_BOOT_SIZE 15 /* 15 blocks */ 202 #define VAX_BOOT_LOAD 0 /* no load offset */ 203 #define VAX_BOOT_ENTRY 0x200 /* one block in */ 204 205 #define VAX_BOOT_BLOCK_OFFSET 0 206 #define VAX_BOOT_BLOCK_BLOCKSIZE 512 207 208 /* The following describes the ULTRIX partition tables. 209 */ 210 /* 211 * DEC_NUM_DISK_PARTS is the number of partitions that are recorded in 212 * the label information. The size of the padding in the Dec_DiskLabel 213 * type is dependent on this number... 214 */ 215 #define DEC_NUM_DISK_PARTS 8 216 217 /* 218 * A disk is divided into partitions and this type specifies where a 219 * partition starts and how many bytes it contains. 220 */ 221 typedef struct dec_disk_map { 222 int32_t num_blocks; /* Number of 512 byte blocks in partition. */ 223 int32_t start_block; /* Start of partition in blocks. */ 224 } dec_disk_map; 225 226 /* 227 * Label information on the 31st (DEC_LABEL_SECTOR) sector. 228 */ 229 typedef struct dec_disklabel { 230 u_int8_t pad0[440]; /* DIFFERENT from sprite!!! */ 231 int32_t magic; /* DEC_LABEL_MAGIC */ 232 int32_t is_partitioned; /* 1 if disk is partitioned. */ 233 dec_disk_map map[DEC_NUM_DISK_PARTS]; /* Indicates disk partitions. */ 234 } dec_disklabel; 235 236 #define DEC_LABEL_MAGIC 0x00032957 237 #define DEC_LABEL_SECTOR 31 238 239 #endif /* !_DEV_DEC_DEC_BOOT_H_ */ 240
Indexes created Wed Oct 01 19:09:53 GMT 2025