boot.c revision 1.20
1 /* $NetBSD: boot.c,v 1.20 2006/01/27 03:11:33 uwe 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 extern void __syncicache(void *, size_t); /* in libkern */ 93 94 95 #ifdef DEBUG 96 # define DPRINTF printf 97 #else 98 # define DPRINTF while (0) printf 99 #endif 100 101 char bootdev[128]; 102 char bootfile[128]; 103 int boothowto; 104 105 static int ofw_version = 0; 106 static const char *kernels[] = { "/netbsd", "/netbsd.gz", "/netbsd.macppc", NULL }; 107 108 static void 109 prom2boot(char *dev) 110 { 111 char *cp; 112 113 cp = dev + strlen(dev) - 1; 114 for (; *cp; cp--) { 115 if (*cp == ':') { 116 if (ofw_version < 3) { 117 /* sd@0:0 -> sd@0 */ 118 *cp = 0; 119 break; 120 } else { 121 /* disk@0:5,boot -> disk@0:0 */ 122 strcpy(cp, ":0"); 123 break; 124 } 125 } 126 } 127 } 128 129 static void 130 parseargs(char *str, int *howtop) 131 { 132 char *cp; 133 134 /* Allow user to drop back to the PROM. */ 135 if (strcmp(str, "exit") == 0) 136 OF_exit(); 137 138 *howtop = 0; 139 140 cp = str; 141 if (*cp == '-') 142 goto found; 143 for (cp = str; *cp; cp++) 144 if (*cp == ' ') 145 goto found; 146 return; 147 148 found: 149 *cp++ = 0; 150 while (*cp) 151 BOOT_FLAG(*cp++, *howtop); 152 } 153 154 static void 155 chain(boot_entry_t entry, char *args, void *ssym, void *esym) 156 { 157 extern char end[]; 158 int l; 159 160 /* 161 * Stash pointer to end of symbol table after the argument 162 * strings. 163 */ 164 l = strlen(args) + 1; 165 memcpy(args + l, &ssym, sizeof(ssym)); 166 l += sizeof(ssym); 167 memcpy(args + l, &esym, sizeof(esym)); 168 l += sizeof(esym); 169 l += sizeof(int); /* XXX */ 170 171 OF_chain((void *) RELOC, end - (char *) RELOC, entry, args, l); 172 panic("chain"); 173 } 174 175 __dead void 176 _rtt(void) 177 { 178 179 OF_exit(); 180 } 181 182 void 183 main(void) 184 { 185 extern char bootprog_name[], bootprog_rev[], 186 bootprog_maker[], bootprog_date[]; 187 int chosen, options, openprom; 188 char bootline[512]; /* Should check size? */ 189 char *cp; 190 u_long marks[MARK_MAX]; 191 u_int32_t entry; 192 void *ssym, *esym; 193 194 printf("\n"); 195 printf(">> %s, Revision %s\n", bootprog_name, bootprog_rev); 196 printf(">> (%s, %s)\n", bootprog_maker, bootprog_date); 197 198 /* 199 * Figure out what version of Open Firmware... 200 */ 201 if ((openprom = OF_finddevice("/openprom")) != -1) { 202 char model[32]; 203 204 memset(model, 0, sizeof model); 205 OF_getprop(openprom, "model", model, sizeof model); 206 for (cp = model; *cp; cp++) 207 if (*cp >= '0' && *cp <= '9') { 208 ofw_version = *cp - '0'; 209 break; 210 } 211 DPRINTF(">> Open Firmware version %d.x\n", ofw_version); 212 } 213 214 /* 215 * Get the boot arguments from Openfirmware 216 */ 217 if ((chosen = OF_finddevice("/chosen")) == -1 || 218 OF_getprop(chosen, "bootpath", bootdev, sizeof bootdev) < 0 || 219 OF_getprop(chosen, "bootargs", bootline, sizeof bootline) < 0) { 220 printf("Invalid Openfirmware environment\n"); 221 OF_exit(); 222 } 223 224 /* 225 * Some versions of Openfirmware sets bootpath to "". 226 * We use boot-device instead if it occurs. 227 */ 228 if (bootdev[0] == 0) { 229 printf("Cannot use bootpath\n"); 230 if ((options = OF_finddevice("/options")) == -1 || 231 OF_getprop(options, "boot-device", bootdev, 232 sizeof bootdev) < 0) { 233 printf("Invalid Openfirmware environment\n"); 234 OF_exit(); 235 } 236 printf("Using boot-device instead\n"); 237 } 238 239 prom2boot(bootdev); 240 parseargs(bootline, &boothowto); 241 DPRINTF("bootline=%s\n", bootline); 242 243 for (;;) { 244 int i; 245 246 if (boothowto & RB_ASKNAME) { 247 printf("Boot: "); 248 gets(bootline); 249 parseargs(bootline, &boothowto); 250 } 251 252 if (bootline[0]) { 253 kernels[0] = bootline; 254 kernels[1] = NULL; 255 } 256 257 for (i = 0; kernels[i]; i++) { 258 DPRINTF("Trying %s\n", kernels[i]); 259 260 marks[MARK_START] = 0; 261 if (loadfile(kernels[i], marks, LOAD_KERNEL) >= 0) 262 goto loaded; 263 } 264 boothowto |= RB_ASKNAME; 265 } 266 loaded: 267 268 #ifdef __notyet__ 269 OF_setprop(chosen, "bootpath", opened_name, strlen(opened_name) + 1); 270 cp = bootline; 271 #else 272 strcpy(bootline, opened_name); 273 cp = bootline + strlen(bootline); 274 *cp++ = ' '; 275 #endif 276 *cp = '-'; 277 if (boothowto & RB_ASKNAME) 278 *++cp = 'a'; 279 if (boothowto & RB_USERCONF) 280 *++cp = 'c'; 281 if (boothowto & RB_SINGLE) 282 *++cp = 's'; 283 if (boothowto & RB_KDB) 284 *++cp = 'd'; 285 if (*cp == '-') 286 #ifdef __notyet__ 287 *cp = 0; 288 #else 289 *--cp = 0; 290 #endif 291 else 292 *++cp = 0; 293 #ifdef __notyet__ 294 OF_setprop(chosen, "bootargs", bootline, strlen(bootline) + 1); 295 #endif 296 297 entry = marks[MARK_ENTRY]; 298 ssym = (void *)marks[MARK_SYM]; 299 esym = (void *)marks[MARK_END]; 300 301 printf(" start=0x%x\n", entry); 302 __syncicache((void *) entry, (u_int) ssym - (u_int) entry); 303 chain((boot_entry_t) entry, bootline, ssym, esym); 304 305 OF_exit(); 306 } 307 308 #ifdef HAVE_CHANGEDISK_HOOK 309 void 310 changedisk_hook(struct open_file *of) 311 { 312 struct of_dev *op = of->f_devdata; 313 int c; 314 315 OF_call_method("eject", op->handle, 0, 0); 316 317 c = getchar(); 318 if (c == 'q') { 319 printf("quit\n"); 320 OF_exit(); 321 } 322 323 OF_call_method("close", op->handle, 0, 0); 324 OF_call_method("open", op->handle, 0, 0); 325 } 326 #endif 327
Indexes created Mon Oct 13 21:09:55 GMT 2025