boot.c revision 1.4.12.4
1 /* $NetBSD: boot.c,v 1.4.12.4 2008/03/17 09:14:16 yamt 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/libsa/dev_net.h> 79 #include <lib/libkern/libkern.h> 80 81 #include <sys/param.h> 82 #include <sys/boot_flag.h> 83 #include <sys/exec.h> 84 #include <sys/exec_elf.h> 85 86 #include <cobalt/dev/gtreg.h> 87 88 #include "boot.h" 89 #include "cons.h" 90 #include "common.h" 91 #include "bootinfo.h" 92 93 char *kernelnames[] = { 94 "netbsd", 95 "netbsd.gz", 96 "onetbsd", 97 "onetbsd.gz", 98 "netbsd.bak", 99 "netbsd.bak.gz", 100 "netbsd.old", 101 "netbsd.old.gz", 102 "netbsd.cobalt", 103 "netbsd.cobalt.gz", 104 "netbsd.elf", 105 "netbsd.elf.gz", 106 NULL 107 }; 108 109 u_int cobalt_id; 110 static const char * const cobalt_model[] = 111 { 112 [0] = "Unknown Cobalt", 113 [COBALT_ID_QUBE2700] = "Cobalt Qube 2700", 114 [COBALT_ID_RAQ] = "Cobalt RaQ", 115 [COBALT_ID_QUBE2] = "Cobalt Qube 2", 116 [COBALT_ID_RAQ2] = "Cobalt RaQ 2" 117 }; 118 #define COBALT_MODELS __arraycount(cobalt_model) 119 120 extern u_long end; /* Boot loader code end address */ 121 void start(void); 122 123 static char *bootstring; 124 125 static int patch_bootstring(char *bootspec); 126 static int get_bsdbootname(char **, char **, int *); 127 static int parse_bootname(char *, int, char **, char **); 128 static void prominit(unsigned int memsize); 129 static void print_banner(unsigned int memsize); 130 static u_int read_board_id(void); 131 132 void cpu_reboot(void); 133 134 int main(unsigned int memsize); 135 136 /* 137 * Perform CPU reboot. 138 */ 139 void 140 cpu_reboot(void) 141 { 142 143 printf("rebooting...\n\n"); 144 145 *(volatile uint8_t *)MIPS_PHYS_TO_KSEG1(LED_ADDR) = LED_RESET; 146 printf("WARNING: reboot failed!\n"); 147 148 for (;;) 149 ; 150 } 151 152 /* 153 * Substitute root value with NetBSD root partition name. 154 */ 155 int 156 patch_bootstring(char *bootspec) 157 { 158 char *sp = bootstring; 159 uint8_t unit, part; 160 int dev; 161 char *file; 162 163 DPRINTF(("patch_bootstring: %s\n", bootspec)); 164 165 /* get boot parameters */ 166 if (devparse(bootspec, &dev, &unit, &part, (const char **)&file) != 0) 167 unit = part = 0; 168 169 DPRINTF(("patch_bootstring: unit = %d, part = %d\n", unit, part)); 170 171 /* take out the 'root=xxx' parameter */ 172 if ((sp = strstr(bootstring, "root=")) != NULL) { 173 const char *end; 174 175 end = strchr(sp, ' '); 176 177 /* strip off leading spaces */ 178 for (--sp; (sp > bootstring) && (*sp == ' '); --sp) 179 ; 180 181 if (end != NULL) 182 strcpy(++sp, end); 183 else 184 *++sp = '\0'; 185 } 186 187 DPRINTF(("patch_bootstring: [%s]\n", bootstring)); 188 189 #define DEVNAMESIZE (MAXDEVNAME + sizeof(" root=/dev/hd") + sizeof("0a")) 190 if (strcmp(devsw[dev].dv_name, "wd") == 0 && 191 strlen(bootstring) <= (511 - DEVNAMESIZE)) { 192 int len; 193 194 /* omit "nfsroot=" arg on wd boot */ 195 if ((sp = strstr(bootstring, "nfsroot=")) != NULL) { 196 const char *end; 197 198 end = strchr(sp, ' '); 199 200 /* strip off leading spaces */ 201 for (--sp; (sp > bootstring) && (*sp == ' '); --sp) 202 ; 203 204 if (end != NULL) 205 strcpy(++sp, end); 206 else 207 *++sp = '\0'; 208 } 209 210 /* bsd notation -> linux notation (wd0a -> hda1) */ 211 strcat(bootstring, " root=/dev/hd"); 212 213 len = strlen(bootstring); 214 bootstring[len++] = unit + 'a'; 215 bootstring[len++] = part + '1'; 216 bootstring[len++] = '\0'; 217 } 218 219 DPRINTF(("patch_bootstring: -> %s\n", bootstring)); 220 return 0; 221 } 222 223 /* 224 * Extract NetBSD boot specification 225 */ 226 static int 227 get_bsdbootname(char **dev, char **kname, int *howtop) 228 { 229 int len; 230 int bootunit, bootpart; 231 char *bootstr_dev, *bootstr_kname; 232 char *prompt_dev, *prompt_kname; 233 char *ptr, *spec; 234 char c, namebuf[PATH_MAX]; 235 static char bootdev[] = "wd0a"; 236 static char nfsbootdev[] = "nfs"; 237 238 bootstr_dev = prompt_dev = NULL; 239 bootstr_kname = prompt_kname = NULL; 240 241 /* first, get root device specified by the firmware */ 242 spec = bootstring; 243 244 /* assume the last one is valid */ 245 while ((spec = strstr(spec, "root=")) != NULL) { 246 spec += 5; /* skip 'root=' */ 247 ptr = strchr(spec, ' '); 248 len = (ptr == NULL) ? strlen(spec) : ptr - spec; 249 /* decode unit and part from "/dev/hd[ab][1-4]" strings */ 250 if (len == 9 && memcmp("/dev/hd", spec, 7) == 0) { 251 bootunit = spec[7] - 'a'; 252 bootpart = spec[8] - '1'; 253 if (bootunit >= 0 && bootunit < 2 && 254 bootpart >= 0 && bootpart < 4) { 255 bootdev[sizeof(bootdev) - 3] = '0' + bootunit; 256 #if 0 /* bootpart is fdisk partition of Linux root */ 257 bootdev[sizeof(bootdev) - 2] = 'a' + bootpart; 258 #endif 259 bootstr_dev = bootdev; 260 } 261 } 262 spec += len; 263 } 264 265 /* second, get bootname from bootstrings */ 266 if ((spec = strstr(bootstring, "nbsd=")) != NULL) { 267 ptr = strchr(spec, ' '); 268 spec += 5; /* skip 'nbsd=' */ 269 len = (ptr == NULL) ? strlen(spec) : ptr - spec; 270 if (len > 0) { 271 if (parse_bootname(spec, len, 272 &bootstr_dev, &bootstr_kname)) 273 return 1; 274 } 275 } 276 277 /* third, check if netboot */ 278 if (strstr(bootstring, "nfsroot=") != NULL) { 279 bootstr_dev = nfsbootdev; 280 } 281 282 DPRINTF(("bootstr_dev = %s, bootstr_kname = %s\n", 283 bootstr_dev ? bootstr_dev : "<NULL>", 284 bootstr_kname ? bootstr_kname : "<NULL>")); 285 286 spec = NULL; 287 len = 0; 288 289 memset(namebuf, 0, sizeof namebuf); 290 printf("Boot [%s:%s]: ", 291 bootstr_dev ? bootstr_dev : DEFBOOTDEV, 292 bootstr_kname ? bootstr_kname : DEFKERNELNAME); 293 294 if (tgets(namebuf) == -1) 295 printf("\n"); 296 297 ptr = namebuf; 298 while ((c = *ptr) != '\0') { 299 while (c == ' ') 300 c = *++ptr; 301 if (c == '\0') 302 break; 303 if (c == '-') { 304 while ((c = *++ptr) && c != ' ') 305 BOOT_FLAG(c, *howtop); 306 } else { 307 spec = ptr; 308 while ((c = *++ptr) && c != ' ') 309 ; 310 if (c) 311 *ptr++ = '\0'; 312 len = strlen(spec); 313 } 314 } 315 316 if (len > 0) { 317 if (parse_bootname(spec, len, &prompt_dev, &prompt_kname)) 318 return 1; 319 } 320 321 DPRINTF(("prompt_dev = %s, prompt_kname = %s\n", 322 prompt_dev ? prompt_dev : "<NULL>", 323 prompt_kname ? prompt_kname : "<NULL>")); 324 325 if (prompt_dev) 326 *dev = prompt_dev; 327 else 328 *dev = bootstr_dev; 329 330 if (prompt_kname) 331 *kname = prompt_kname; 332 else 333 *kname = bootstr_kname; 334 335 DPRINTF(("dev = %s, kname = %s\n", 336 *dev ? *dev : "<NULL>", 337 *kname ? *kname : "<NULL>")); 338 339 return 0; 340 } 341 342 static int 343 parse_bootname(char *spec, int len, char **dev, char **kname) 344 { 345 char *bootname, *ptr; 346 347 bootname = alloc(len + 1); 348 if (bootname == NULL) 349 return 1; 350 memcpy(bootname, spec, len); 351 bootname[len] = '\0'; 352 353 if ((ptr = memchr(bootname, ':', len)) != NULL) { 354 /* "wdXX:kernel" */ 355 *ptr = '\0'; 356 *dev = bootname; 357 if (*++ptr) 358 *kname = ptr; 359 } else 360 /* "kernel" */ 361 *kname = bootname; 362 return 0; 363 } 364 365 /* 366 * Get the bootstring from PROM. 367 */ 368 void 369 prominit(unsigned int memsize) 370 { 371 372 bootstring = (char *)(memsize - 512); 373 bootstring[511] = '\0'; 374 } 375 376 /* 377 * Print boot message. 378 */ 379 void 380 print_banner(unsigned int memsize) 381 { 382 383 printf("\n"); 384 printf(">> %s " NETBSD_VERS " Bootloader, Revision %s [@%p]\n", 385 bootprog_name, bootprog_rev, (void*)&start); 386 printf(">> (%s, %s)\n", bootprog_maker, bootprog_date); 387 printf(">> Model:\t\t%s\n", cobalt_model[cobalt_id]); 388 printf(">> Memory:\t\t%u k\n", (memsize - MIPS_KSEG0_START) / 1024); 389 printf(">> PROM boot string:\t%s\n", bootstring); 390 } 391 392 u_int 393 read_board_id(void) 394 { 395 uint32_t tag, reg; 396 397 #define PCIB_PCI_BUS 0 398 #define PCIB_PCI_DEV 9 399 #define PCIB_PCI_FUNC 0 400 #define PCIB_BOARD_ID_REG 0x94 401 #define COBALT_BOARD_ID(reg) ((reg & 0x000000f0) >> 4) 402 403 tag = (PCIB_PCI_BUS << 16) | (PCIB_PCI_DEV << 11) | 404 (PCIB_PCI_FUNC << 8); 405 reg = pcicfgread(tag, PCIB_BOARD_ID_REG); 406 407 return COBALT_BOARD_ID(reg); 408 } 409 410 /* 411 * Entry point. 412 * Parse PROM boot string, load the kernel and jump into it 413 */ 414 int 415 main(unsigned int memsize) 416 { 417 char **namep, *dev, *kernel, *bi_addr; 418 char bootpath[PATH_MAX]; 419 int win; 420 u_long marks[MARK_MAX]; 421 void (*entry)(unsigned int, u_int, char *); 422 423 struct btinfo_flags bi_flags; 424 struct btinfo_symtab bi_syms; 425 struct btinfo_bootpath bi_bpath; 426 struct btinfo_howto bi_howto; 427 int addr, speed, howto; 428 429 try_bootp = 1; 430 431 /* Initialize boot info early */ 432 dev = NULL; 433 kernel = NULL; 434 howto = 0x0; 435 bi_flags.bi_flags = 0x0; 436 bi_addr = bi_init(); 437 438 cobalt_id = read_board_id(); 439 prominit(memsize); 440 if (cninit(&addr, &speed) != NULL) 441 bi_flags.bi_flags |= BI_SERIAL_CONSOLE; 442 443 print_banner(memsize); 444 445 memset(marks, 0, sizeof marks); 446 get_bsdbootname(&dev, &kernel, &howto); 447 448 if (kernel != NULL) { 449 DPRINTF(("kernel: %s\n", kernel)); 450 kernelnames[0] = kernel; 451 kernelnames[1] = NULL; 452 } else { 453 DPRINTF(("kernel: NULL\n")); 454 } 455 456 win = 0; 457 DPRINTF(("Kernel names: %p\n", kernelnames)); 458 for (namep = kernelnames, win = 0; (*namep != NULL) && !win; namep++) { 459 kernel = *namep; 460 461 bootpath[0] = '\0'; 462 463 strcpy(bootpath, dev ? dev : DEFBOOTDEV); 464 strcat(bootpath, ":"); 465 strcat(bootpath, kernel); 466 467 printf("Loading: %s", bootpath); 468 if (howto) 469 printf(" (howto 0x%x)", howto); 470 printf("\n"); 471 patch_bootstring(bootpath); 472 win = (loadfile(bootpath, marks, LOAD_ALL) != -1); 473 } 474 475 if (win) { 476 strncpy(bi_bpath.bootpath, kernel, BTINFO_BOOTPATH_LEN); 477 bi_add(&bi_bpath, BTINFO_BOOTPATH, sizeof(bi_bpath)); 478 479 entry = (void *)marks[MARK_ENTRY]; 480 bi_syms.nsym = marks[MARK_NSYM]; 481 bi_syms.ssym = marks[MARK_SYM]; 482 bi_syms.esym = marks[MARK_END]; 483 bi_add(&bi_syms, BTINFO_SYMTAB, sizeof(bi_syms)); 484 485 bi_add(&bi_flags, BTINFO_FLAGS, sizeof(bi_flags)); 486 487 bi_howto.bi_howto = howto; 488 bi_add(&bi_howto, BTINFO_HOWTO, sizeof(bi_howto)); 489 490 entry = (void *)marks[MARK_ENTRY]; 491 492 DPRINTF(("Bootinfo @ 0x%x\n", bi_addr)); 493 printf("Starting at 0x%x\n\n", (u_int)entry); 494 (*entry)(memsize, BOOTINFO_MAGIC, bi_addr); 495 } 496 497 (void)printf("Boot failed! Rebooting...\n"); 498 return 0; 499 } 500
Indexes created Sat Sep 20 22:09:52 GMT 2025