boot.c revision 1.19
1 /* $NetBSD: boot.c,v 1.19 2005/12/11 12:18:06 christos 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 * 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) 1995, 1996 Wolfgang Solfrank. 41 * Copyright (C) 1995, 1996 TooLs GmbH. 42 * All rights reserved. 43 * 44 * ELF support derived from NetBSD/alpha's boot loader, written 45 * by Christopher G. Demetriou. 46 * 47 * Redistribution and use in source and binary forms, with or without 48 * modification, are permitted provided that the following conditions 49 * are met: 50 * 1. Redistributions of source code must retain the above copyright 51 * notice, this list of conditions and the following disclaimer. 52 * 2. Redistributions in binary form must reproduce the above copyright 53 * notice, this list of conditions and the following disclaimer in the 54 * documentation and/or other materials provided with the distribution. 55 * 3. All advertising materials mentioning features or use of this software 56 * must display the following acknowledgement: 57 * This product includes software developed by TooLs GmbH. 58 * 4. The name of TooLs GmbH may not be used to endorse or promote products 59 * derived from this software without specific prior written permission. 60 * 61 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 62 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 63 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 64 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 65 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 66 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 67 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 68 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 69 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 70 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 71 */ 72 73 /* 74 * First try for the boot code 75 * 76 * Input syntax is: 77 * [promdev[{:|,}partition]]/[filename] [flags] 78 */ 79 80 #include "boot.h" 81 82 #include <sys/param.h> 83 #include <sys/boot_flag.h> 84 85 #include <lib/libsa/stand.h> 86 #include <lib/libsa/loadfile.h> 87 #include <lib/libkern/libkern.h> 88 89 #include "ofdev.h" 90 #include "openfirm.h" 91 92 #ifdef DEBUG 93 # define DPRINTF printf 94 #else 95 # define DPRINTF while (0) printf 96 #endif 97 98 char bootdev[128]; 99 char bootfile[128]; 100 int boothowto; 101 102 static ofw_version = 0; 103 static char *kernels[] = { "/netbsd", "/netbsd.gz", "/netbsd.macppc", NULL }; 104 105 static void 106 prom2boot(char *dev) 107 { 108 char *cp; 109 110 cp = dev + strlen(dev) - 1; 111 for (; *cp; cp--) { 112 if (*cp == ':') { 113 if (ofw_version < 3) { 114 /* sd@0:0 -> sd@0 */ 115 *cp = 0; 116 break; 117 } else { 118 /* disk@0:5,boot -> disk@0:0 */ 119 strcpy(cp, ":0"); 120 break; 121 } 122 } 123 } 124 } 125 126 static void 127 parseargs(char *str, int *howtop) 128 { 129 char *cp; 130 131 /* Allow user to drop back to the PROM. */ 132 if (strcmp(str, "exit") == 0) 133 OF_exit(); 134 135 *howtop = 0; 136 137 cp = str; 138 if (*cp == '-') 139 goto found; 140 for (cp = str; *cp; cp++) 141 if (*cp == ' ') 142 goto found; 143 return; 144 145 found: 146 *cp++ = 0; 147 while (*cp) 148 BOOT_FLAG(*cp++, *howtop); 149 } 150 151 static void 152 chain(boot_entry_t entry, char *args, void *ssym, void *esym) 153 { 154 extern char end[]; 155 int l; 156 157 /* 158 * Stash pointer to end of symbol table after the argument 159 * strings. 160 */ 161 l = strlen(args) + 1; 162 memcpy(args + l, &ssym, sizeof(ssym)); 163 l += sizeof(ssym); 164 memcpy(args + l, &esym, sizeof(esym)); 165 l += sizeof(esym); 166 l += sizeof(int); /* XXX */ 167 168 OF_chain((void *) RELOC, end - (char *) RELOC, entry, args, l); 169 panic("chain"); 170 } 171 172 __dead void 173 _rtt(void) 174 { 175 176 OF_exit(); 177 } 178 179 void 180 main(void) 181 { 182 extern char bootprog_name[], bootprog_rev[], 183 bootprog_maker[], bootprog_date[]; 184 int chosen, options, openprom; 185 char bootline[512]; /* Should check size? */ 186 char *cp; 187 u_long marks[MARK_MAX]; 188 u_int32_t entry; 189 void *ssym, *esym; 190 191 printf("\n"); 192 printf(">> %s, Revision %s\n", bootprog_name, bootprog_rev); 193 printf(">> (%s, %s)\n", bootprog_maker, bootprog_date); 194 195 /* 196 * Figure out what version of Open Firmware... 197 */ 198 if ((openprom = OF_finddevice("/openprom")) != -1) { 199 char model[32]; 200 201 memset(model, 0, sizeof model); 202 OF_getprop(openprom, "model", model, sizeof model); 203 for (cp = model; *cp; cp++) 204 if (*cp >= '0' && *cp <= '9') { 205 ofw_version = *cp - '0'; 206 break; 207 } 208 DPRINTF(">> Open Firmware version %d.x\n", ofw_version); 209 } 210 211 /* 212 * Get the boot arguments from Openfirmware 213 */ 214 if ((chosen = OF_finddevice("/chosen")) == -1 || 215 OF_getprop(chosen, "bootpath", bootdev, sizeof bootdev) < 0 || 216 OF_getprop(chosen, "bootargs", bootline, sizeof bootline) < 0) { 217 printf("Invalid Openfirmware environment\n"); 218 OF_exit(); 219 } 220 221 /* 222 * Some versions of Openfirmware sets bootpath to "". 223 * We use boot-device instead if it occurs. 224 */ 225 if (bootdev[0] == 0) { 226 printf("Cannot use bootpath\n"); 227 if ((options = OF_finddevice("/options")) == -1 || 228 OF_getprop(options, "boot-device", bootdev, 229 sizeof bootdev) < 0) { 230 printf("Invalid Openfirmware environment\n"); 231 OF_exit(); 232 } 233 printf("Using boot-device instead\n"); 234 } 235 236 prom2boot(bootdev); 237 parseargs(bootline, &boothowto); 238 DPRINTF("bootline=%s\n", bootline); 239 240 for (;;) { 241 int i; 242 243 if (boothowto & RB_ASKNAME) { 244 printf("Boot: "); 245 gets(bootline); 246 parseargs(bootline, &boothowto); 247 } 248 249 if (bootline[0]) { 250 kernels[0] = bootline; 251 kernels[1] = NULL; 252 } 253 254 for (i = 0; kernels[i]; i++) { 255 DPRINTF("Trying %s\n", kernels[i]); 256 257 marks[MARK_START] = 0; 258 if (loadfile(kernels[i], marks, LOAD_KERNEL) >= 0) 259 goto loaded; 260 } 261 boothowto |= RB_ASKNAME; 262 } 263 loaded: 264 265 #ifdef __notyet__ 266 OF_setprop(chosen, "bootpath", opened_name, strlen(opened_name) + 1); 267 cp = bootline; 268 #else 269 strcpy(bootline, opened_name); 270 cp = bootline + strlen(bootline); 271 *cp++ = ' '; 272 #endif 273 *cp = '-'; 274 if (boothowto & RB_ASKNAME) 275 *++cp = 'a'; 276 if (boothowto & RB_USERCONF) 277 *++cp = 'c'; 278 if (boothowto & RB_SINGLE) 279 *++cp = 's'; 280 if (boothowto & RB_KDB) 281 *++cp = 'd'; 282 if (*cp == '-') 283 #ifdef __notyet__ 284 *cp = 0; 285 #else 286 *--cp = 0; 287 #endif 288 else 289 *++cp = 0; 290 #ifdef __notyet__ 291 OF_setprop(chosen, "bootargs", bootline, strlen(bootline) + 1); 292 #endif 293 294 entry = marks[MARK_ENTRY]; 295 ssym = (void *)marks[MARK_SYM]; 296 esym = (void *)marks[MARK_END]; 297 298 printf(" start=0x%x\n", entry); 299 __syncicache((void *) entry, (u_int) ssym - (u_int) entry); 300 chain((boot_entry_t) entry, bootline, ssym, esym); 301 302 OF_exit(); 303 } 304 305 #ifdef HAVE_CHANGEDISK_HOOK 306 void 307 changedisk_hook(struct open_file *of) 308 { 309 struct of_dev *op = of->f_devdata; 310 int c; 311 312 OF_call_method("eject", op->handle, 0, 0); 313 314 c = getchar(); 315 if (c == 'q') { 316 printf("quit\n"); 317 OF_exit(); 318 } 319 320 OF_call_method("close", op->handle, 0, 0); 321 OF_call_method("open", op->handle, 0, 0); 322 } 323 #endif 324
Indexes created Mon Oct 13 21:09:55 GMT 2025