boot.c revision 1.7
1 /* $NetBSD: boot.c,v 1.7 2007/08/10 16:47:07 tsutsui Exp $ */ 2 3 /*- 4 * Copyright (c) 2003 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jonathan Stone, Michael Hitch, Simon Burge and Wayne Knowles. 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 /* 40 * Copyright (c) 1992, 1993 41 * The Regents of the University of California. All rights reserved. 42 * 43 * This code is derived from software contributed to Berkeley by 44 * Ralph Campbell. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 2. Redistributions in binary form must reproduce the above copyright 52 * notice, this list of conditions and the following disclaimer in the 53 * documentation and/or other materials provided with the distribution. 54 * 3. Neither the name of the University nor the names of its contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 * 70 * @(#)boot.c 8.1 (Berkeley) 6/10/93 71 */ 72 73 #include <machine/cpu.h> 74 #include <machine/leds.h> 75 76 #include <lib/libsa/stand.h> 77 #include <lib/libsa/loadfile.h> 78 #include <lib/libkern/libkern.h> 79 80 #include <sys/param.h> 81 #include <sys/boot_flag.h> 82 #include <sys/exec.h> 83 #include <sys/exec_elf.h> 84 85 #include "boot.h" 86 #include "cons.h" 87 #include "common.h" 88 #include "bootinfo.h" 89 90 char *kernelnames[] = { 91 "netbsd", 92 "netbsd.gz", 93 "onetbsd", 94 "onetbsd.gz", 95 "netbsd.bak", 96 "netbsd.bak.gz", 97 "netbsd.old", 98 "netbsd.old.gz", 99 "netbsd.cobalt", 100 "netbsd.cobalt.gz", 101 "netbsd.elf", 102 "netbsd.elf.gz", 103 NULL 104 }; 105 106 extern u_long end; /* Boot loader code end address */ 107 void start(void); 108 109 static char *bootstring; 110 111 static int patch_bootstring (char *bootspec); 112 static int get_bsdbootname(char **, char **, int *); 113 static int parse_bootname(char *, int, char **, char **); 114 static int prominit (unsigned int memsize); 115 static int print_banner (unsigned int memsize); 116 117 int cpu_reboot(void); 118 119 int main(unsigned int memsize); 120 121 /* 122 * Perform CPU reboot. 123 */ 124 int 125 cpu_reboot(void) 126 { 127 printf("rebooting...\n\n"); 128 129 *(volatile uint8_t *)MIPS_PHYS_TO_KSEG1(LED_ADDR) = LED_RESET; 130 printf("WARNING: reboot failed!\n"); 131 132 for (;;) 133 ; 134 } 135 136 /* 137 * Substitute root value with NetBSD root partition name. 138 */ 139 int 140 patch_bootstring(char *bootspec) 141 { 142 char *sp = bootstring; 143 uint8_t unit, part; 144 int dev, error; 145 char *file; 146 147 DPRINTF(("patch_bootstring: %s\n", bootspec)); 148 149 /* get boot parameters */ 150 if (devparse(bootspec, &dev, &unit, &part, (const char **)&file) != 0) 151 unit = part = 0; 152 153 DPRINTF(("patch_bootstring: %d, %d\n", unit, part)); 154 155 /* take out the 'root=xxx' parameter */ 156 if ((sp = strstr(bootstring, "root=")) != NULL) { 157 const char *end; 158 159 end = strchr(sp, ' '); 160 161 /* strip off leading spaces */ 162 for (--sp; (sp > bootstring) && (*sp == ' '); --sp) 163 ; 164 165 if (end != NULL) 166 strcpy(++sp, end); 167 else 168 *++sp = '\0'; 169 } 170 171 DPRINTF(("patch_bootstring: [%s]\n", bootstring)); 172 173 #define DEVNAMESIZE (MAXDEVNAME + sizeof(" root=/dev/hd") + sizeof("0a")) 174 /* bsd notation -> linux notation (wd0a -> hda1) */ 175 if (strlen(bootstring) <= (511 - DEVNAMESIZE)) { 176 int len; 177 178 strcat(bootstring, " root=/dev/hd"); 179 180 len = strlen(bootstring); 181 bootstring[len++] = unit + 'a'; 182 bootstring[len++] = part + '1'; 183 bootstring[len++] = '\0'; 184 } 185 186 DPRINTF(("patch_bootstring: -> %s\n", bootstring)); 187 return 0; 188 } 189 190 /* 191 * Extract NetBSD boot specification 192 */ 193 static int 194 get_bsdbootname(char **dev, char **kname, int *howtop) 195 { 196 int len, error; 197 char *bootstr_dev, *bootstr_kname; 198 char *prompt_dev, *prompt_kname; 199 char *ptr, *spec; 200 char c, namebuf[PATH_MAX]; 201 202 bootstr_dev = prompt_dev = NULL; 203 bootstr_kname = prompt_kname = NULL; 204 205 /* first, get bootname from bootstrings */ 206 if ((spec = strstr(bootstring, "nbsd=")) != NULL) { 207 ptr = strchr(spec, ' '); 208 spec += 5; /* skip 'nbsd=' */ 209 len = (ptr == NULL) ? strlen(spec) : ptr - spec; 210 if (len > 0) { 211 if (parse_bootname(spec, len, 212 &bootstr_dev, &bootstr_kname)) 213 return 1; 214 } 215 } 216 217 DPRINTF(("bootstr_dev = %s, bootstr_kname = %s\n", 218 bootstr_dev ? bootstr_dev : "<NULL>", 219 bootstr_kname ? bootstr_kname : "<NULL>")); 220 221 spec = NULL; 222 len = 0; 223 224 memset(namebuf, 0, sizeof namebuf); 225 printf("Boot [%s:%s]: ", 226 bootstr_dev ? bootstr_dev : DEFBOOTDEV, 227 bootstr_kname ? bootstr_kname : DEFKERNELNAME); 228 229 if (tgets(namebuf) == -1) 230 printf("\n"); 231 232 ptr = namebuf; 233 while ((c = *ptr) != '\0') { 234 while (c == ' ') 235 c = *++ptr; 236 if (c == '\0') 237 break; 238 if (c == '-') { 239 while ((c = *++ptr) && c != ' ') 240 BOOT_FLAG(c, *howtop); 241 } else { 242 spec = ptr; 243 while ((c = *++ptr) && c != ' ') 244 ; 245 if (c) 246 *ptr++ = '\0'; 247 len = strlen(spec); 248 } 249 } 250 251 if (len > 0) { 252 if (parse_bootname(spec, len, &prompt_dev, &prompt_kname)) 253 return 1; 254 } 255 256 DPRINTF(("prompt_dev = %s, prompt_kname = %s\n", 257 prompt_dev ? prompt_dev : "<NULL>", 258 prompt_kname ? prompt_kname : "<NULL>")); 259 260 if (prompt_dev) 261 *dev = prompt_dev; 262 else 263 *dev = bootstr_dev; 264 265 if (prompt_kname) 266 *kname = prompt_kname; 267 else 268 *kname = bootstr_kname; 269 270 DPRINTF(("dev = %s, kname = %s\n", 271 *dev ? *dev : "<NULL>", 272 *kname ? *kname : "<NULL>")); 273 274 return 0; 275 } 276 277 static int 278 parse_bootname(char *spec, int len, char **dev, char **kname) 279 { 280 char *bootname, *ptr; 281 282 bootname = alloc(len + 1); 283 if (bootname == NULL) 284 return 1; 285 memcpy(bootname, spec, len); 286 bootname[len] = '\0'; 287 288 if ((ptr = memchr(bootname, ':', len)) != NULL) { 289 /* "wdXX:kernel" */ 290 *ptr = '\0'; 291 *dev = bootname; 292 if (*++ptr) 293 *kname = ptr; 294 } else 295 /* "kernel" */ 296 *kname = bootname; 297 return 0; 298 } 299 300 /* 301 * Get the bootstring from PROM. 302 */ 303 int 304 prominit(unsigned int memsize) 305 { 306 307 bootstring = (char *)(memsize - 512); 308 bootstring[511] = '\0'; 309 } 310 311 /* 312 * Print boot message. 313 */ 314 int 315 print_banner(unsigned int memsize) 316 { 317 318 printf("\n"); 319 printf(">> %s " NETBSD_VERS " Bootloader, Revision %s [@%p]\n", 320 bootprog_name, bootprog_rev, (void*)&start); 321 printf(">> (%s, %s)\n", bootprog_maker, bootprog_date); 322 printf(">> Memory:\t\t%u k\n", (memsize - MIPS_KSEG0_START) / 1024); 323 printf(">> PROM boot string:\t%s\n", bootstring); 324 } 325 326 /* 327 * Entry point. 328 * Parse PROM boot string, load the kernel and jump into it 329 */ 330 int 331 main(unsigned int memsize) 332 { 333 char **namep, *dev, *kernel, *bi_addr; 334 char bootpath[PATH_MAX]; 335 int win; 336 u_long marks[MARK_MAX]; 337 void (*entry)(unsigned int, u_int, char *); 338 339 struct btinfo_flags bi_flags; 340 struct btinfo_symtab bi_syms; 341 struct btinfo_bootpath bi_bpath; 342 struct btinfo_howto bi_howto; 343 344 int addr, speed, howto; 345 346 /* Initialize boot info early */ 347 howto = 0x0; 348 bi_flags.bi_flags = 0x0; 349 bi_addr = bi_init(); 350 351 prominit(memsize); 352 if (cninit(&addr, &speed) != NULL) 353 bi_flags.bi_flags |= BI_SERIAL_CONSOLE; 354 355 print_banner(memsize); 356 357 memset(marks, 0, sizeof marks); 358 get_bsdbootname(&dev, &kernel, &howto); 359 360 if (kernel != NULL) { 361 DPRINTF(("kernel: %s\n", kernel)); 362 kernelnames[0] = kernel; 363 kernelnames[1] = NULL; 364 } else { 365 DPRINTF(("kernel: NULL\n")); 366 } 367 368 win = 0; 369 DPRINTF(("Kernel names: %p\n", kernelnames)); 370 for (namep = kernelnames, win = 0; (*namep != NULL) && !win; namep++) { 371 kernel = *namep; 372 373 bootpath[0] = '\0'; 374 375 strcpy(bootpath, dev ? dev : DEFBOOTDEV); 376 strcat(bootpath, ":"); 377 strcat(bootpath, kernel); 378 379 printf("Loading: %s", bootpath); 380 if (howto) 381 printf(" (howto 0x%x)", howto); 382 printf("\n"); 383 patch_bootstring(bootpath); 384 win = (loadfile(bootpath, marks, LOAD_ALL) != -1); 385 } 386 387 if (win) { 388 strncpy(bi_bpath.bootpath, kernel, BTINFO_BOOTPATH_LEN); 389 bi_add(&bi_bpath, BTINFO_BOOTPATH, sizeof(bi_bpath)); 390 391 entry = (void *)marks[MARK_ENTRY]; 392 bi_syms.nsym = marks[MARK_NSYM]; 393 bi_syms.ssym = marks[MARK_SYM]; 394 bi_syms.esym = marks[MARK_END]; 395 bi_add(&bi_syms, BTINFO_SYMTAB, sizeof(bi_syms)); 396 397 bi_add(&bi_flags, BTINFO_FLAGS, sizeof(bi_flags)); 398 399 bi_howto.bi_howto = howto; 400 bi_add(&bi_howto, BTINFO_HOWTO, sizeof(bi_howto)); 401 402 entry = (void *)marks[MARK_ENTRY]; 403 404 DPRINTF(("Bootinfo @ 0x%x\n", bi_addr)); 405 printf("Starting at 0x%x\n\n", (u_int)entry); 406 (*entry)(memsize, BOOTINFO_MAGIC, bi_addr); 407 } 408 409 (void)printf("Boot failed! Rebooting...\n"); 410 return 0; 411 } 412
Indexes created Sat Sep 20 22:09:52 GMT 2025