sparc.c revision 1.1
1 /* $NetBSD: sparc.c,v 1.1 2002/05/06 16:24:46 pk Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 2002 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Matt Fredette, Paul Kranenburg, and Luke Mewburn. 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 NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 #if defined(__RCSID) && !defined(__lint) 41 __RCSID("$NetBSD: sparc.c,v 1.1 2002/05/06 16:24:46 pk Exp $"); 42 #endif /* !__lint */ 43 44 #if HAVE_CONFIG_H 45 #include "config.h" 46 #endif 47 48 #include <sys/param.h> 49 #include <sys/stat.h> 50 51 #include <assert.h> 52 #include <err.h> 53 #include <stddef.h> 54 #include <stdio.h> 55 #include <stdlib.h> 56 #include <string.h> 57 #include <unistd.h> 58 59 #if HAVE_CONFIG_H 60 #include "../../sys/sys/bootblock.h" 61 #else 62 #include <sys/bootblock.h> 63 #endif 64 65 #include "installboot.h" 66 67 int 68 sparc_clearboot(ib_params *params) 69 { 70 char bb[SPARC_BOOT_BLOCK_MAX_SIZE]; 71 ssize_t rv; 72 73 assert(params != NULL); 74 assert(params->fsfd != -1); 75 assert(params->filesystem != NULL); 76 77 if (params->flags & IB_STARTBLOCK) { 78 warnx("Can't use `-b bno' with `-c'"); 79 return (0); 80 } 81 82 /* first check that it _could_ exist here */ 83 rv = pread(params->fsfd, &bb, sizeof(bb), SPARC_BOOT_BLOCK_OFFSET); 84 if (rv == -1) { 85 warn("Reading `%s'", params->filesystem); 86 return (0); 87 } else if (rv != sizeof(bb)) { 88 warnx("Reading `%s': short read", params->filesystem); 89 return (0); 90 } 91 92 /* now clear it out to nothing */ 93 memset(&bb, 0, sizeof(bb)); 94 95 if (params->flags & IB_VERBOSE) 96 printf("%slearing boot block\n", 97 (params->flags & IB_NOWRITE) ? "Not c" : "C"); 98 if (params->flags & IB_NOWRITE) 99 return (1); 100 101 rv = pwrite(params->fsfd, &bb, sizeof(bb), SPARC_BOOT_BLOCK_OFFSET); 102 if (rv == -1) { 103 warn("Writing `%s'", params->filesystem); 104 return (0); 105 } else if (rv != sizeof(bb)) { 106 warnx("Writing `%s': short write", params->filesystem); 107 return (0); 108 } 109 110 return (1); 111 } 112 113 int 114 sparc_setboot(ib_params *params) 115 { 116 struct stat bootstrapsb; 117 char bb[SPARC_BOOT_BLOCK_MAX_SIZE]; 118 uint32_t startblock; 119 int retval; 120 ssize_t rv; 121 size_t bbi; 122 struct sparc_bbinfo *bbinfop; /* bbinfo in prototype image */ 123 uint32_t maxblk, nblk, blk_i; 124 ib_block *blocks = NULL; 125 126 assert(params != NULL); 127 assert(params->fsfd != -1); 128 assert(params->filesystem != NULL); 129 assert(params->fstype != NULL); 130 assert(params->s1fd != -1); 131 assert(params->stage1 != NULL); 132 assert(SPARC_BBINFO_MAGICSIZE == 32); 133 134 if (params->stage2 == NULL) { 135 warnx("You must provide the name of the secondary bootstrap"); 136 return (0); 137 } 138 139 retval = 0; 140 141 if (fstat(params->s1fd, &bootstrapsb) == -1) { 142 warn("Examining `%s'", params->stage1); 143 goto done; 144 } 145 if (!S_ISREG(bootstrapsb.st_mode)) { 146 warnx("`%s' must be a regular file", params->stage1); 147 goto done; 148 } 149 if (bootstrapsb.st_size > sizeof(bb)) { 150 warnx("`%s' cannot be larger than %lu bytes", 151 params->stage1, (unsigned long)sizeof(bb)); 152 goto done; 153 } 154 155 /* 156 * Read 1st stage boot program 157 * Leave room for a 32-byte a.out header. 158 */ 159 memset(&bb, 0, sizeof(bb)); 160 rv = read(params->s1fd, bb + 32, sizeof(bb) - 32); 161 if (rv == -1) { 162 warn("Reading `%s'", params->stage1); 163 goto done; 164 } 165 166 /* 167 * Quick sanity check that the bootstrap given 168 * is *not* an ELF executable. 169 */ 170 if (memcmp(bb + 32 + 1, "ELF", strlen("ELF")) == 0) { 171 warnx("`%s' is an ELF executable; need raw binary", 172 params->stage1); 173 goto done; 174 } 175 176 /* Look for the bbinfo structure. */ 177 for (bbi = 0; bbi < sizeof(bb); bbi += sizeof(uint32_t)) { 178 bbinfop = (void *) (bb + bbi); 179 if (memcmp(bbinfop->bbi_magic, SPARC_BBINFO_MAGIC, 180 SPARC_BBINFO_MAGICSIZE) == 0) 181 break; 182 } 183 if (bbi >= sizeof(bb)) { 184 warnx("`%s' does not have a bbinfo structure\n", 185 params->stage1); 186 goto done; 187 } 188 maxblk = be32toh(bbinfop->bbi_block_count); 189 if (maxblk == 0 || maxblk > (sizeof(bb) / sizeof(uint32_t))) { 190 warnx("bbinfo structure in `%s' has preposterous size `%u'", 191 params->stage1, maxblk); 192 goto done; 193 } 194 195 /* Allocate space for our block list. */ 196 blocks = malloc(sizeof(*blocks) * maxblk); 197 if (blocks == NULL) { 198 warn("Allocating %lu bytes", 199 (unsigned long) sizeof(*blocks) * maxblk); 200 goto done; 201 } 202 203 /* Make sure the (probably new) secondary bootstrap is on disk. */ 204 sync(); sleep(1); sync(); 205 206 /* Collect the blocks for the secondary bootstrap. */ 207 nblk = maxblk; 208 if (! params->fstype->findstage2(params, &nblk, blocks)) 209 goto done; 210 if (nblk == 0) { 211 warnx("Secondary bootstrap `%s' is empty", 212 params->stage2); 213 goto done; 214 } 215 216 /* Save those blocks in the primary bootstrap. */ 217 bbinfop->bbi_block_count = htobe32(nblk); 218 bbinfop->bbi_block_size = htobe32(blocks[0].blocksize); 219 for (blk_i = 0; blk_i < nblk; blk_i++) { 220 bbinfop->bbi_block_table[blk_i] = 221 htobe32(blocks[blk_i].block); 222 if (blocks[blk_i].blocksize < blocks[0].blocksize && 223 blk_i + 1 != nblk) { 224 warnx("Secondary bootstrap `%s' blocks do not have " \ 225 "a uniform size\n", params->stage2); 226 goto done; 227 } 228 } 229 230 /* 231 * sun4c/sun4m PROMs require an a.out(5) format header. 232 * Old-style sun4 PROMs do not expect a header at all. 233 * To deal with this, we construct a header that is also executable 234 * code containing a forward branch that gets us past the 32-byte 235 * header where the actual code begins. In assembly: 236 * .word MAGIC ! a NOP 237 * ba,a start ! 238 * .skip 24 ! pad 239 * start: 240 */ 241 #define SUN_MAGIC 0x01030107 242 #define SUN4_BASTART 0x30800007 /* i.e.: ba,a `start' */ 243 *((uint32_t *)bb) = htobe32(SUN_MAGIC); 244 *((uint32_t *)bb + 1) = htobe32(SUN4_BASTART); 245 246 if (params->flags & IB_STARTBLOCK) 247 startblock = params->startblock; 248 else 249 startblock = 250 SPARC_BOOT_BLOCK_OFFSET / SPARC_BOOT_BLOCK_BLOCKSIZE; 251 252 if (params->flags & IB_VERBOSE) { 253 printf("Bootstrap start sector: %u\n", startblock); 254 printf("Bootstrap byte count: %u\n", (unsigned)rv); 255 printf("Bootstrap block table: %u entries avail, %u used:", 256 maxblk, nblk); 257 for (blk_i = 0; blk_i < nblk; blk_i++) 258 printf(" %u", blocks[blk_i].block); 259 printf("\n%sriting bootstrap\n", 260 (params->flags & IB_NOWRITE) ? "Not w" : "W"); 261 } 262 if (params->flags & IB_NOWRITE) { 263 retval = 1; 264 goto done; 265 } 266 267 rv = pwrite(params->fsfd, &bb, sizeof(bb), 268 startblock * SPARC_BOOT_BLOCK_BLOCKSIZE); 269 if (rv == -1) { 270 warn("Writing `%s'", params->filesystem); 271 goto done; 272 } else if (rv != sizeof(bb)) { 273 warnx("Writing `%s': short write", params->filesystem); 274 goto done; 275 } else { 276 277 /* Sync filesystems (to clean in-memory superblock?) */ 278 sync(); 279 280 retval = 1; 281 } 282 283 done: 284 if (blocks != NULL) 285 free (blocks); 286 return (retval); 287 } 288
Indexes created Wed Sep 24 05:09:52 GMT 2025