dec_boot.h revision 1.1
1 /* $NetBSD: dec_boot.h,v 1.1 2000/06/16 23:09:57 matt 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 * devDiskLabel.h -- 41 * 42 * This defines the disk label that Sun writes on the 0'th sector of 43 * the 0'th cylinder of its SMD disks. The disk label contains some 44 * geometry information and also the division of the disk into a 45 * number of partitions. Each partition is identified to the drive 46 * by a different unit number. 47 * 48 * from: Header: /sprite/src/kernel/dev/RCS/devDiskLabel.h, 49 * v 9.4 90/03/01 12:22:36 jhh Exp SPRITE (Berkeley) 50 */ 51 52 #ifndef _DEV_DEC_DEC_BOOT_H_ 53 #define _DEV_DEC_DEC_BOOT_H_ 54 55 /* 56 * Boot block information on the 0th sector. 57 * The boot program is stored in sequences of contiguous blocks. 58 * 59 * NOTE: The standard disk label offset is 64 which is 60 * after the boot information expected by the PROM boot loader. 61 */ 62 63 /* PMAX (DECstation / MIPS) boot block information 64 */ 65 /* 66 * If mode is 0, there is just one sequence of blocks and one Dec_BootMap 67 * is used. If mode is 1, there are multiple sequences of blocks 68 * and multiple Dec_BootMaps are used, the last with numBlocks = 0. 69 */ 70 struct pmax_boot_map { 71 int32_t num_blocks; /* Number of blocks to read. */ 72 int32_t start_block; /* Starting block on disk. */ 73 }; 74 75 /* 76 * This is the structure of a disk or tape boot block. The boot_map 77 * can either be a single boot count and start block (contiguous mode) 78 * or a list of up to 61 (to fill a 512 byte sector) block count and 79 * start block pairs. Under NetBSD, contiguous mode is always used. 80 */ 81 struct pmax_boot_block { 82 u_int8_t pad[8]; 83 int32_t magic; /* PMAX_BOOT_MAGIC */ 84 int32_t mode; /* Mode for boot info. */ 85 u_int32_t load_addr; /* Address to start loading. */ 86 u_int32_t exec_addr; /* Address to start execing. */ 87 struct pmax_boot_map map[61]; /* boot program section(s). */ 88 } __attribute__((__packed__)); 89 90 #define PMAX_BOOT_MAGIC 0x0002757a 91 #define PMAX_BOOTMODE_CONTIGUOUS 0 92 #define PMAX_BOOTMODE_SCATTERED 1 93 94 #define PMAX_BOOT_BLOCK_OFFSET 0 95 #define PMAX_BOOT_BLOCK_BLOCKSIZE 512 96 97 /* VAX boot block information 98 * 99 */ 100 struct vax_boot_block { 101 /* Note that these don't overlap any of the pmax boot block 102 */ 103 u_int8_t pad0[2]; 104 u_int8_t bb_id_offset; /* offset in words to id (magic1)*/ 105 u_int8_t bb_mbone /* must be one */ 106 u_int16_t bb_lbn_hi; /* lbn (hi word) of bootstrap */ 107 u_int16_t bb_lbn_low; /* lbn (low word) of bootstrap */ 108 u_int8_t pad1[332]; 109 110 /* The rest of these fields are identification area and describe 111 * the secondary block for uVAX VMB. 112 */ 113 u_int8_t bb_magic1; /* magic number */ 114 u_int8_t bb_mbz1; /* must be zero */ 115 u_int8_t bb_pad1; /* any value */ 116 u_int8_t bb_sum1; /* ~(magic1 + mbz1 + pad1) */ 117 118 u_int8_t bb_mbz2; /* must be zero */ 119 u_int8_t bb_volinfo; /* volinfo */ 120 u_int8_t bb_pad2a; /* any value */ 121 u_int8_t bb_pad2b; /* any value */ 122 123 u_int32_t bb_size; /* size in blocks of bootstrap */ 124 u_int32_t bb_load; /* load offset to bootstrap */ 125 u_int32_t bb_entry; /* byte offset in bootstrap */ 126 u_int32_t bb_sum3; /* sum of previous 3 fields */ 127 128 /* The rest is unused. 129 */ 130 u_int8_t pad2[148]; 131 } __attribute__((__packed__)); 132 133 #define VAX_BOOT_MAGIC1 0x18 /* size of BB info? */ 134 #define VAX_BOOT_VOLINFO_NONE 0x00 /* no special info */ 135 #define VAX_BOOT_VOLINFO_SS 0x01 /* single sided */ 136 #define VAX_BOOT_VOLINFO_DS 0x81 /* double sided */ 137 138 #define VAX_BOOT_SIZE 16 /* 16 blocks */ 139 #define VAX_BOOT_LOAD 0 /* no load offset */ 140 #define VAX_BOOT_ENTRY 0x200 /* one block in */ 141 142 #define VAX_BOOT_BLOCK_OFFSET 0 143 #define VAX_BOOT_BLOCK_BLOCKSIZE 512 144 145 /* The following describes the ULTRIX partition tables. 146 */ 147 /* 148 * DEC_NUM_DISK_PARTS is the number of partitions that are recorded in 149 * the label information. The size of the padding in the Dec_DiskLabel 150 * type is dependent on this number... 151 */ 152 #define DEC_NUM_DISK_PARTS 8 153 154 /* 155 * A disk is divided into partitions and this type specifies where a 156 * partition starts and how many bytes it contains. 157 */ 158 typedef struct dec_disk_map { 159 int32_t num_blocks; /* Number of 512 byte blocks in partition. */ 160 int32_t start_block; /* Start of partition in blocks. */ 161 } dec_disk_map; 162 163 /* 164 * Label information on the 31st (DEC_LABEL_SECTOR) sector. 165 */ 166 typedef struct dec_disklabel { 167 u_int8_t pad0[440]; /* DIFFERENT from sprite!!! */ 168 int32_t magic; /* DEC_LABEL_MAGIC */ 169 int32_t is_partitioned; /* 1 if disk is partitioned. */ 170 dec_disk_map map[DEC_NUM_DISK_PARTS]; /* Indicates disk partitions. */ 171 } dec_disklabel; 172 173 #define DEC_LABEL_MAGIC 0x00032957 174 #define DEC_LABEL_SECTOR 31 175 176 #endif /* !_DEV_DEC_DEC_BOOT_H_ */ 177
Indexes created Tue Sep 23 07:09:52 GMT 2025