boot.c revision 1.13
1 /* $NetBSD: boot.c,v 1.13 2001/08/23 14:17:27 tsubai 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 #define ELFSIZE 32 /* We use 32-bit ELF. */ 81 82 #include <sys/param.h> 83 #include <sys/exec.h> 84 #include <sys/exec_elf.h> 85 #include <sys/reboot.h> 86 #include <sys/disklabel.h> 87 #include <sys/boot_flag.h> 88 89 #include <lib/libsa/stand.h> 90 #include <lib/libsa/loadfile.h> 91 #include <lib/libkern/libkern.h> 92 93 #include <machine/cpu.h> 94 95 #include "ofdev.h" 96 #include "openfirm.h" 97 98 #ifdef DEBUG 99 # define DPRINTF printf 100 #else 101 # define DPRINTF while (0) printf 102 #endif 103 104 char bootdev[128]; 105 char bootfile[128]; 106 int boothowto; 107 int debug; 108 109 static ofw_version = 0; 110 static char *kernels[] = { "/netbsd", "/netbsd.gz", "/netbsd.macppc", NULL }; 111 112 static void 113 prom2boot(dev) 114 char *dev; 115 { 116 char *cp; 117 118 cp = dev + strlen(dev) - 1; 119 for (; *cp; cp--) { 120 if (*cp == ':') { 121 if (ofw_version < 3) { 122 /* sd@0:0 -> sd@0 */ 123 *cp = 0; 124 break; 125 } else { 126 /* disk@0:5,boot -> disk@0:0 */ 127 strcpy(cp, ":0"); 128 break; 129 } 130 } 131 } 132 } 133 134 static void 135 parseargs(str, howtop) 136 char *str; 137 int *howtop; 138 { 139 char *cp; 140 141 /* Allow user to drop back to the PROM. */ 142 if (strcmp(str, "exit") == 0) 143 OF_exit(); 144 145 *howtop = 0; 146 147 cp = str; 148 if (*cp == '-') 149 goto found; 150 for (cp = str; *cp; cp++) 151 if (*cp == ' ') 152 goto found; 153 return; 154 155 found: 156 *cp++ = 0; 157 while (*cp) 158 BOOT_FLAG(*cp++, *howtop); 159 } 160 161 static void 162 chain(entry, args, ssym, esym) 163 void (*entry)(); 164 char *args; 165 void *ssym, *esym; 166 { 167 extern char end[]; 168 int l; 169 170 /* 171 * Stash pointer to end of symbol table after the argument 172 * strings. 173 */ 174 l = strlen(args) + 1; 175 memcpy(args + l, &ssym, sizeof(ssym)); 176 l += sizeof(ssym); 177 memcpy(args + l, &esym, sizeof(esym)); 178 l += sizeof(esym); 179 l += sizeof(int); /* XXX */ 180 181 OF_chain((void *)RELOC, end - (char *)RELOC, entry, args, l); 182 panic("chain"); 183 } 184 185 __dead void 186 _rtt() 187 { 188 189 OF_exit(); 190 } 191 192 void 193 main() 194 { 195 extern char bootprog_name[], bootprog_rev[], 196 bootprog_maker[], bootprog_date[]; 197 int chosen, options, openprom; 198 char bootline[512]; /* Should check size? */ 199 char *cp; 200 u_long marks[MARK_MAX]; 201 u_int32_t entry; 202 void *ssym, *esym; 203 204 printf("\n"); 205 printf(">> %s, Revision %s\n", bootprog_name, bootprog_rev); 206 printf(">> (%s, %s)\n", bootprog_maker, bootprog_date); 207 208 /* 209 * Figure out what version of Open Firmware... 210 */ 211 if ((openprom = OF_finddevice("/openprom")) != -1) { 212 char model[32]; 213 214 memset(model, 0, sizeof model); 215 OF_getprop(openprom, "model", model, sizeof model); 216 for (cp = model; *cp; cp++) 217 if (*cp >= '0' && *cp <= '9') { 218 ofw_version = *cp - '0'; 219 break; 220 } 221 #if 0 222 printf(">> Open Firmware version %d.x\n", ofw_version); 223 #endif 224 } 225 226 /* 227 * Get the boot arguments from Openfirmware 228 */ 229 if ((chosen = OF_finddevice("/chosen")) == -1 || 230 OF_getprop(chosen, "bootpath", bootdev, sizeof bootdev) < 0 || 231 OF_getprop(chosen, "bootargs", bootline, sizeof bootline) < 0) { 232 printf("Invalid Openfirmware environment\n"); 233 OF_exit(); 234 } 235 236 /* 237 * Some versions of Openfirmware sets bootpath to "". 238 * We use boot-device instead if it occurs. 239 */ 240 if (bootdev[0] == 0) { 241 printf("Cannot use bootpath\n"); 242 if ((options = OF_finddevice("/options")) == -1 || 243 OF_getprop(options, "boot-device", bootdev, 244 sizeof bootdev) < 0) { 245 printf("Invalid Openfirmware environment\n"); 246 OF_exit(); 247 } 248 printf("Using boot-device instead\n"); 249 } 250 251 prom2boot(bootdev); 252 parseargs(bootline, &boothowto); 253 DPRINTF("bootline=%s\n", bootline); 254 255 for (;;) { 256 int i; 257 258 if (boothowto & RB_ASKNAME) { 259 printf("Boot: "); 260 gets(bootline); 261 parseargs(bootline, &boothowto); 262 } 263 264 if (bootline[0]) { 265 kernels[0] = bootline; 266 kernels[1] = NULL; 267 } 268 269 for (i = 0; kernels[i]; i++) { 270 DPRINTF("Trying %s\n", kernels[i]); 271 272 marks[MARK_START] = 0; 273 if (loadfile(kernels[i], marks, LOAD_KERNEL) >= 0) 274 goto loaded; 275 } 276 boothowto |= RB_ASKNAME; 277 } 278 loaded: 279 280 #ifdef __notyet__ 281 OF_setprop(chosen, "bootpath", opened_name, strlen(opened_name) + 1); 282 cp = bootline; 283 #else 284 strcpy(bootline, opened_name); 285 cp = bootline + strlen(bootline); 286 *cp++ = ' '; 287 #endif 288 *cp = '-'; 289 if (boothowto & RB_ASKNAME) 290 *++cp = 'a'; 291 if (boothowto & RB_SINGLE) 292 *++cp = 's'; 293 if (boothowto & RB_KDB) 294 *++cp = 'd'; 295 if (*cp == '-') 296 #ifdef __notyet__ 297 *cp = 0; 298 #else 299 *--cp = 0; 300 #endif 301 else 302 *++cp = 0; 303 #ifdef __notyet__ 304 OF_setprop(chosen, "bootargs", bootline, strlen(bootline) + 1); 305 #endif 306 307 entry = marks[MARK_ENTRY]; 308 ssym = (void *)marks[MARK_SYM]; 309 esym = (void *)marks[MARK_END]; 310 311 printf(" start=0x%x\n", entry); 312 __syncicache((void *)entry, (u_int)ssym - (u_int)entry); 313 chain((void *)entry, bootline, ssym, esym); 314 315 OF_exit(); 316 } 317
Indexes created Mon Oct 13 21:09:55 GMT 2025