boot.c revision 1.30.2.1
1 /* $NetBSD: boot.c,v 1.30.2.1 2021/04/03 22:28:30 thorpej 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 #include <sys/disklabel.h> 78 79 #include <lib/libsa/stand.h> 80 #include <lib/libsa/loadfile.h> 81 #include <lib/libkern/libkern.h> 82 83 #include "ofdev.h" 84 #include "openfirm.h" 85 86 extern void __syncicache(void *, size_t); /* in libkern */ 87 88 89 #ifdef DEBUG 90 # define DPRINTF printf 91 #else 92 # define DPRINTF while (0) printf 93 #endif 94 95 char bootdev[MAXBOOTPATHLEN]; 96 extern char bootfile[MAXBOOTPATHLEN]; 97 int boothowto; 98 bool floppyboot; 99 int ofw_version = 0; 100 101 static const char *kernels[] = { "/netbsd", "/netbsd.gz", "/netbsd.macppc", NULL }; 102 103 static void 104 prom2boot(char *dev) 105 { 106 char *cp; 107 108 cp = dev + strlen(dev) - 1; 109 for (; *cp; cp--) { 110 if (*cp == ':') { 111 if (ofw_version < 3) { 112 /* sd@0:0 -> sd@0 */ 113 *cp = 0; 114 break; 115 } else { 116 /* disk@0:5,boot -> disk@0:0 */ 117 strcpy(cp, ":0"); 118 break; 119 } 120 } 121 } 122 } 123 124 static void 125 parseargs(char *str, int *howtop) 126 { 127 char *cp; 128 129 /* Allow user to drop back to the PROM. */ 130 if (strcmp(str, "exit") == 0) 131 OF_exit(); 132 133 *howtop = 0; 134 135 cp = str; 136 if (*cp == '-') 137 goto found; 138 for (cp = str; *cp; cp++) 139 if (*cp == ' ') 140 goto found; 141 return; 142 143 found: 144 *cp++ = 0; 145 while (*cp) 146 BOOT_FLAG(*cp++, *howtop); 147 } 148 149 static bool 150 is_floppyboot(const char *path, const char *defaultdev) 151 { 152 char dev[MAXBOOTPATHLEN]; 153 char nam[16]; 154 int handle, rv; 155 156 if (parsefilepath(path, dev, NULL, NULL)) { 157 if (dev[0] == '\0' && defaultdev != NULL) 158 strlcpy(dev, defaultdev, sizeof(dev)); 159 160 /* check properties */ 161 handle = OF_finddevice(dev); 162 if (handle != -1) { 163 rv = OF_getprop(handle, "name", nam, sizeof(nam)); 164 if (rv >= 0 && 165 (strcmp(nam, "swim3") == 0 || 166 strcmp(nam, "floppy") == 0)) 167 return true; 168 } 169 170 /* also check devalias */ 171 if (strcmp(dev, "fd") == 0) 172 return true; 173 } 174 175 return false; 176 } 177 178 static void 179 chain(boot_entry_t entry, char *args, void *ssym, void *esym) 180 { 181 extern char end[]; 182 int l; 183 184 #if !defined(HEAP_VARIABLE) 185 freeall(); 186 #endif 187 188 /* 189 * Stash pointer to end of symbol table after the argument 190 * strings. 191 */ 192 l = strlen(args) + 1; 193 memcpy(args + l, &ssym, sizeof(ssym)); 194 l += sizeof(ssym); 195 memcpy(args + l, &esym, sizeof(esym)); 196 l += sizeof(esym); 197 l += sizeof(int); /* XXX */ 198 199 OF_chain((void *) RELOC, end - (char *) RELOC, entry, args, l); 200 panic("chain"); 201 } 202 203 __dead void 204 _rtt(void) 205 { 206 207 OF_exit(); 208 } 209 210 void 211 main(void) 212 { 213 extern char bootprog_name[], bootprog_rev[]; 214 char bootline[512]; /* Should check size? */ 215 char prop[32]; 216 char *cp; 217 u_long marks[MARK_MAX]; 218 u_int32_t entry; 219 void *ssym, *esym; 220 221 printf("\n"); 222 printf(">> %s, Revision %s\n", bootprog_name, bootprog_rev); 223 224 /* 225 * Figure out what version of Open Firmware... 226 */ 227 if (ofw_openprom != -1) { 228 memset(prop, 0, sizeof prop); 229 OF_getprop(ofw_openprom, "model", prop, sizeof prop); 230 for (cp = prop; *cp; cp++) 231 if (*cp >= '0' && *cp <= '9') { 232 ofw_version = *cp - '0'; 233 break; 234 } 235 printf(">> Open Firmware version %d.x\n", ofw_version); 236 } 237 printf(">> Open Firmware running in %s-mode.\n", 238 ofw_real_mode ? "real" : "virtual"); 239 240 /* 241 * Get the boot arguments from Openfirmware 242 */ 243 if (OF_getprop(ofw_chosen, "bootpath", bootdev, sizeof bootdev) < 0 || 244 OF_getprop(ofw_chosen, "bootargs", bootline, sizeof bootline) < 0) { 245 printf("Invalid Openfirmware environment\n"); 246 OF_exit(); 247 } 248 249 /* 250 * Some versions of Openfirmware sets bootpath to "". 251 * We use boot-device instead if it occurs. 252 */ 253 if (bootdev[0] == 0) { 254 printf("Cannot use bootpath\n"); 255 if (ofw_options == -1 || 256 OF_getprop(ofw_options, "boot-device", bootdev, 257 sizeof bootdev) < 0) { 258 printf("Invalid Openfirmware environment\n"); 259 OF_exit(); 260 } 261 printf("Using boot-device instead\n"); 262 } 263 264 prom2boot(bootdev); 265 parseargs(bootline, &boothowto); 266 DPRINTF("bootline=%s\n", bootline); 267 268 for (;;) { 269 int i, loadflag; 270 271 if (boothowto & RB_ASKNAME) { 272 printf("Boot: "); 273 kgets(bootline, sizeof(bootline)); 274 parseargs(bootline, &boothowto); 275 } 276 277 if (bootline[0]) { 278 kernels[0] = bootline; 279 kernels[1] = NULL; 280 } 281 282 for (i = 0; kernels[i]; i++) { 283 floppyboot = is_floppyboot(kernels[i], bootdev); 284 285 DPRINTF("Trying %s%s\n", kernels[i], 286 floppyboot ? " (floppyboot)" : ""); 287 288 loadflag = LOAD_KERNEL; 289 if (floppyboot) 290 loadflag &= ~LOAD_BACKWARDS; 291 292 marks[MARK_START] = 0; 293 if (loadfile(kernels[i], marks, loadflag) >= 0) 294 goto loaded; 295 } 296 boothowto |= RB_ASKNAME; 297 } 298 loaded: 299 300 #ifdef __notyet__ 301 OF_setprop(ofw_chosen, "bootpath", opened_name, 302 strlen(opened_name) + 1); 303 cp = bootline; 304 #else 305 strcpy(bootline, opened_name); 306 cp = bootline + strlen(bootline); 307 *cp++ = ' '; 308 #endif 309 *cp = '-'; 310 if (boothowto & RB_ASKNAME) 311 *++cp = 'a'; 312 if (boothowto & RB_USERCONF) 313 *++cp = 'c'; 314 if (boothowto & RB_SINGLE) 315 *++cp = 's'; 316 if (boothowto & RB_KDB) 317 *++cp = 'd'; 318 if (*cp == '-') 319 #ifdef __notyet__ 320 *cp = 0; 321 #else 322 *--cp = 0; 323 #endif 324 else 325 *++cp = 0; 326 #ifdef __notyet__ 327 OF_setprop(ofw_chosen, "bootargs", bootline, strlen(bootline) + 1); 328 #endif 329 330 entry = marks[MARK_ENTRY]; 331 ssym = (void *)marks[MARK_SYM]; 332 esym = (void *)marks[MARK_END]; 333 334 printf(" start=0x%x\n", entry); 335 __syncicache((void *)(uintptr_t)entry, (size_t)ssym - entry); 336 chain((boot_entry_t)(uintptr_t)entry, bootline, ssym, esym); 337 338 OF_exit(); 339 } 340 341 #ifdef HAVE_CHANGEDISK_HOOK 342 void 343 changedisk_hook(struct open_file *of) 344 { 345 struct of_dev *op = of->f_devdata; 346 int c; 347 348 OF_call_method("eject", op->handle, 0, 0, NULL); 349 350 c = getchar(); 351 if (c == 'q') { 352 printf("quit\n"); 353 OF_exit(); 354 } 355 356 OF_call_method("close", op->handle, 0, 0, NULL); 357 OF_call_method("open", op->handle, 0, 0, NULL); 358 } 359 #endif 360
Indexes created Mon Oct 13 21:09:55 GMT 2025