boot.c revision 1.2
1 /* $NetBSD: boot.c,v 1.2 2003/08/07 16:27:17 agc 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 #include <machine/vmparam.h> 76 77 #include <lib/libsa/stand.h> 78 #include <lib/libsa/loadfile.h> 79 #include <lib/libkern/libkern.h> 80 81 #include <sys/param.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 89 char *kernelnames[] = { 90 "netbsd", 91 "netbsd.gz", 92 "onetbsd", 93 "onetbsd.gz", 94 "netbsd.bak", 95 "netbsd.bak.gz", 96 "netbsd.old", 97 "netbsd.old.gz", 98 "netbsd.cobalt", 99 "netbsd.cobalt.gz", 100 "netbsd.elf", 101 "netbsd.elf.gz", 102 NULL 103 }; 104 105 extern long end; 106 static char *bootstring; 107 108 static int patch_bootstring (char *bootspec); 109 static int get_bsdbootname (char **dev, char **name, char **kname); 110 static int prominit (unsigned int memsize); 111 static int print_banner (unsigned int memsize); 112 113 void start(void); 114 int cpu_reboot(void); 115 int main(unsigned int memsize); 116 117 /* 118 * Perform CPU reboot. 119 */ 120 int 121 cpu_reboot() 122 { 123 printf("rebooting...\n\n"); 124 125 *(volatile char *)MIPS_PHYS_TO_KSEG1(LED_ADDR) = LED_RESET; 126 printf("WARNING: reboot failed!\n"); 127 128 for (;;); 129 } 130 131 /* 132 * Substitute root value with NetBSD root partition name. 133 */ 134 int 135 patch_bootstring(bootspec) 136 char *bootspec; 137 { 138 char *sp = bootstring; 139 u_int8_t unit, part; 140 int dev, error; 141 char *file; 142 143 DPRINTF(("patch_bootstring: %s\n", bootspec)); 144 145 /* get boot parameters */ 146 if (devparse(bootspec, &dev, &unit, &part, (const char **)&file) != 0) 147 unit = part = 0; 148 149 DPRINTF(("patch_bootstring: %d, %d\n", unit, part)); 150 151 /* take out the 'root=xxx' parameter */ 152 if ( (sp = strstr(bootstring, "root=")) != NULL) { 153 const char *end; 154 155 end = strchr(sp, ' '); 156 157 /* strip off leading spaces */ 158 for (--sp; (sp > bootstring) && (*sp == ' '); --sp) 159 ; 160 161 if (end != NULL) 162 strcpy(++sp, end); 163 else 164 *++sp = '\0'; 165 } 166 167 DPRINTF(("patch_bootstring: [%s]\n", bootstring)); 168 169 #define DEVNAMESIZE (MAXDEVNAME + sizeof(" root=/dev/hd") + sizeof("0a")) 170 /* bsd notation -> linux notation (wd0a -> hda1) */ 171 if (strlen(bootstring) <= (511 - DEVNAMESIZE)) { 172 int len; 173 174 strcat(bootstring, " root=/dev/hd"); 175 176 len = strlen(bootstring); 177 bootstring[len++] = unit + 'a'; 178 bootstring[len++] = part + '1'; 179 bootstring[len++] = '\0'; 180 } 181 182 DPRINTF(("patch_bootstring: -> %s\n", bootstring)); 183 return (0); 184 } 185 186 /* 187 * Extract NetBSD boot specification 188 */ 189 int 190 get_bsdbootname(dev, name, kname) 191 char **dev; 192 char **name; 193 char **kname; 194 { 195 char *spec; 196 197 *dev = NULL; 198 *name = NULL; 199 *kname = NULL; 200 201 if ( (spec = strstr(bootstring, "nbsd=")) != NULL) { 202 int len; 203 char *ptr = strchr(spec, ' '); 204 205 spec += 5; /* skip 'nbsd=' */ 206 len = (ptr == NULL) ? strlen(spec) : ptr - spec; 207 208 if (len > 0) { 209 char *devname = alloc(len + 1); 210 if (devname != NULL) { 211 memcpy(devname, spec, len); 212 devname[len] = '\0'; 213 214 if ( (ptr = memchr(devname,':',len)) != NULL) { 215 /* wdXX:kernel */ 216 *ptr = '\0'; 217 *dev = devname; 218 219 if (*++ptr) 220 *kname = ptr; 221 222 devname = alloc(len + 1); 223 if (devname != NULL) { 224 memcpy(devname, spec, len); 225 devname[len] = '\0'; 226 } 227 } 228 229 *name = devname; 230 return (0); 231 } 232 } 233 } 234 235 return (1); 236 } 237 238 /* 239 * Get the bootstring from PROM. 240 */ 241 int 242 prominit(memsize) 243 unsigned int memsize; 244 { 245 bootstring = (char *)(memsize - 512); 246 bootstring[511] = '\0'; 247 } 248 249 /* 250 * Print boot message. 251 */ 252 int 253 print_banner(memsize) 254 unsigned int memsize; 255 { 256 printf("\n"); 257 printf(">> %s " NETBSD_VERS " Bootloader, Revision %s [@%p]\n", 258 bootprog_name, bootprog_rev, 259 (unsigned long)&start & ~PAGE_MASK); 260 printf(">> (%s, %s)\n", bootprog_maker, bootprog_date); 261 printf(">> Memory:\t\t%u k\n", (memsize - MIPS_KSEG0_START) / 1024); 262 printf(">> PROM boot string:\t%s\n", bootstring); 263 } 264 265 /* 266 * Entry point. 267 * Parse PROM boot string, load the kernel and jump into it 268 */ 269 int 270 main(memsize) 271 unsigned int memsize; 272 { 273 char *name, **namep, *dev, *kernel, *spec; 274 char bootpath[PATH_MAX]; 275 int win; 276 u_long marks[MARK_MAX]; 277 void (*entry) __P((unsigned int)); 278 279 int addr, speed; 280 281 prominit(memsize); 282 cninit(&addr, &speed); 283 284 print_banner(memsize); 285 286 memset(marks, 0, sizeof marks); 287 get_bsdbootname(&dev, &name, &kernel); 288 289 if (kernel != NULL) { 290 DPRINTF(("kernel: %s\n", kernel)); 291 patch_bootstring(name); 292 win = (loadfile(name, marks, LOAD_KERNEL) == 0); 293 } else { 294 win = 0; 295 DPRINTF(("kernel: NULL\n")); 296 for (namep = kernelnames, win = 0; 297 (*namep != NULL) && !win; 298 namep++) { 299 kernel = *namep; 300 301 bootpath[0] = '\0'; 302 303 strcpy(bootpath, (dev != NULL) ? dev : "wd0a"); 304 strcat(bootpath, ":"); 305 strcat(bootpath, kernel); 306 307 printf("Loading: %s\n", bootpath); 308 patch_bootstring(bootpath); 309 win = (loadfile(bootpath, marks, LOAD_ALL) != -1); 310 } 311 } 312 313 if (win) { 314 entry = (void *) marks[MARK_ENTRY]; 315 316 printf("Starting at 0x%x\n\n", (u_int)entry); 317 (*entry)(memsize); 318 } 319 320 (void)printf("Boot failed! Rebooting...\n"); 321 return (0); 322 } 323
Indexes created Sat Sep 20 22:09:52 GMT 2025