boot.c revision 1.21.74.1
1 /* $NetBSD: boot.c,v 1.21.74.1 2008/05/18 12:32:23 yamt Exp $ */ 2 3 /*- 4 * Copyright (c) 1997 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe. 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 34 * Copyright (C) 1995, 1996 TooLs GmbH. 35 * All rights reserved. 36 * 37 * ELF support derived from NetBSD/alpha's boot loader, written 38 * by Christopher G. Demetriou. 39 * 40 * Redistribution and use in source and binary forms, with or without 41 * modification, are permitted provided that the following conditions 42 * are met: 43 * 1. Redistributions of source code must retain the above copyright 44 * notice, this list of conditions and the following disclaimer. 45 * 2. Redistributions in binary form must reproduce the above copyright 46 * notice, this list of conditions and the following disclaimer in the 47 * documentation and/or other materials provided with the distribution. 48 * 3. All advertising materials mentioning features or use of this software 49 * must display the following acknowledgement: 50 * This product includes software developed by TooLs GmbH. 51 * 4. The name of TooLs GmbH may not be used to endorse or promote products 52 * derived from this software without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 55 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 56 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 57 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 58 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 59 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 60 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 61 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 62 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 63 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 64 */ 65 66 /* 67 * First try for the boot code 68 * 69 * Input syntax is: 70 * [promdev[{:|,}partition]]/[filename] [flags] 71 */ 72 73 #include "boot.h" 74 75 #include <sys/param.h> 76 #include <sys/boot_flag.h> 77 78 #include <lib/libsa/stand.h> 79 #include <lib/libsa/loadfile.h> 80 #include <lib/libkern/libkern.h> 81 82 #include "ofdev.h" 83 #include "openfirm.h" 84 85 extern void __syncicache(void *, size_t); /* in libkern */ 86 87 88 #ifdef DEBUG 89 # define DPRINTF printf 90 #else 91 # define DPRINTF while (0) printf 92 #endif 93 94 char bootdev[128]; 95 char bootfile[128]; 96 int boothowto; 97 98 static int ofw_version = 0; 99 static const char *kernels[] = { "/netbsd", "/netbsd.gz", "/netbsd.macppc", NULL }; 100 101 static void 102 prom2boot(char *dev) 103 { 104 char *cp; 105 106 cp = dev + strlen(dev) - 1; 107 for (; *cp; cp--) { 108 if (*cp == ':') { 109 if (ofw_version < 3) { 110 /* sd@0:0 -> sd@0 */ 111 *cp = 0; 112 break; 113 } else { 114 /* disk@0:5,boot -> disk@0:0 */ 115 strcpy(cp, ":0"); 116 break; 117 } 118 } 119 } 120 } 121 122 static void 123 parseargs(char *str, int *howtop) 124 { 125 char *cp; 126 127 /* Allow user to drop back to the PROM. */ 128 if (strcmp(str, "exit") == 0) 129 OF_exit(); 130 131 *howtop = 0; 132 133 cp = str; 134 if (*cp == '-') 135 goto found; 136 for (cp = str; *cp; cp++) 137 if (*cp == ' ') 138 goto found; 139 return; 140 141 found: 142 *cp++ = 0; 143 while (*cp) 144 BOOT_FLAG(*cp++, *howtop); 145 } 146 147 static void 148 chain(boot_entry_t entry, char *args, void *ssym, void *esym) 149 { 150 extern char end[]; 151 int l; 152 153 freeall(); 154 155 /* 156 * Stash pointer to end of symbol table after the argument 157 * strings. 158 */ 159 l = strlen(args) + 1; 160 memcpy(args + l, &ssym, sizeof(ssym)); 161 l += sizeof(ssym); 162 memcpy(args + l, &esym, sizeof(esym)); 163 l += sizeof(esym); 164 l += sizeof(int); /* XXX */ 165 166 OF_chain((void *) RELOC, end - (char *) RELOC, entry, args, l); 167 panic("chain"); 168 } 169 170 __dead void 171 _rtt(void) 172 { 173 174 OF_exit(); 175 } 176 177 void 178 main(void) 179 { 180 extern char bootprog_name[], bootprog_rev[], 181 bootprog_maker[], bootprog_date[]; 182 int chosen, options, openprom; 183 char bootline[512]; /* Should check size? */ 184 char *cp; 185 u_long marks[MARK_MAX]; 186 u_int32_t entry; 187 void *ssym, *esym; 188 189 printf("\n"); 190 printf(">> %s, Revision %s\n", bootprog_name, bootprog_rev); 191 printf(">> (%s, %s)\n", bootprog_maker, bootprog_date); 192 193 /* 194 * Figure out what version of Open Firmware... 195 */ 196 if ((openprom = OF_finddevice("/openprom")) != -1) { 197 char model[32]; 198 199 memset(model, 0, sizeof model); 200 OF_getprop(openprom, "model", model, sizeof model); 201 for (cp = model; *cp; cp++) 202 if (*cp >= '0' && *cp <= '9') { 203 ofw_version = *cp - '0'; 204 break; 205 } 206 DPRINTF(">> Open Firmware version %d.x\n", ofw_version); 207 } 208 209 /* 210 * Get the boot arguments from Openfirmware 211 */ 212 if ((chosen = OF_finddevice("/chosen")) == -1 || 213 OF_getprop(chosen, "bootpath", bootdev, sizeof bootdev) < 0 || 214 OF_getprop(chosen, "bootargs", bootline, sizeof bootline) < 0) { 215 printf("Invalid Openfirmware environment\n"); 216 OF_exit(); 217 } 218 219 /* 220 * Some versions of Openfirmware sets bootpath to "". 221 * We use boot-device instead if it occurs. 222 */ 223 if (bootdev[0] == 0) { 224 printf("Cannot use bootpath\n"); 225 if ((options = OF_finddevice("/options")) == -1 || 226 OF_getprop(options, "boot-device", bootdev, 227 sizeof bootdev) < 0) { 228 printf("Invalid Openfirmware environment\n"); 229 OF_exit(); 230 } 231 printf("Using boot-device instead\n"); 232 } 233 234 prom2boot(bootdev); 235 parseargs(bootline, &boothowto); 236 DPRINTF("bootline=%s\n", bootline); 237 238 for (;;) { 239 int i; 240 241 if (boothowto & RB_ASKNAME) { 242 printf("Boot: "); 243 gets(bootline); 244 parseargs(bootline, &boothowto); 245 } 246 247 if (bootline[0]) { 248 kernels[0] = bootline; 249 kernels[1] = NULL; 250 } 251 252 for (i = 0; kernels[i]; i++) { 253 DPRINTF("Trying %s\n", kernels[i]); 254 255 marks[MARK_START] = 0; 256 if (loadfile(kernels[i], marks, LOAD_KERNEL) >= 0) 257 goto loaded; 258 } 259 boothowto |= RB_ASKNAME; 260 } 261 loaded: 262 263 #ifdef __notyet__ 264 OF_setprop(chosen, "bootpath", opened_name, strlen(opened_name) + 1); 265 cp = bootline; 266 #else 267 strcpy(bootline, opened_name); 268 cp = bootline + strlen(bootline); 269 *cp++ = ' '; 270 #endif 271 *cp = '-'; 272 if (boothowto & RB_ASKNAME) 273 *++cp = 'a'; 274 if (boothowto & RB_USERCONF) 275 *++cp = 'c'; 276 if (boothowto & RB_SINGLE) 277 *++cp = 's'; 278 if (boothowto & RB_KDB) 279 *++cp = 'd'; 280 if (*cp == '-') 281 #ifdef __notyet__ 282 *cp = 0; 283 #else 284 *--cp = 0; 285 #endif 286 else 287 *++cp = 0; 288 #ifdef __notyet__ 289 OF_setprop(chosen, "bootargs", bootline, strlen(bootline) + 1); 290 #endif 291 292 entry = marks[MARK_ENTRY]; 293 ssym = (void *)marks[MARK_SYM]; 294 esym = (void *)marks[MARK_END]; 295 296 printf(" start=0x%x\n", entry); 297 __syncicache((void *) entry, (u_int) ssym - (u_int) entry); 298 chain((boot_entry_t) entry, bootline, ssym, esym); 299 300 OF_exit(); 301 } 302 303 #ifdef HAVE_CHANGEDISK_HOOK 304 void 305 changedisk_hook(struct open_file *of) 306 { 307 struct of_dev *op = of->f_devdata; 308 int c; 309 310 OF_call_method("eject", op->handle, 0, 0); 311 312 c = getchar(); 313 if (c == 'q') { 314 printf("quit\n"); 315 OF_exit(); 316 } 317 318 OF_call_method("close", op->handle, 0, 0); 319 OF_call_method("open", op->handle, 0, 0); 320 } 321 #endif 322
Indexes created Tue Oct 14 21:09:58 GMT 2025