boot.c revision 1.12
1 /* $NetBSD: boot.c,v 1.12 2001/08/13 15:38:11 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); 179 180 OF_chain((void *)RELOC, end - (char *)RELOC, entry, args, l); 181 panic("chain"); 182 } 183 184 __dead void 185 _rtt() 186 { 187 188 OF_exit(); 189 } 190 191 void 192 main() 193 { 194 extern char bootprog_name[], bootprog_rev[], 195 bootprog_maker[], bootprog_date[]; 196 int chosen, options, openprom; 197 char bootline[512]; /* Should check size? */ 198 char *cp; 199 u_long marks[MARK_MAX]; 200 u_int32_t entry; 201 void *ssym, *esym; 202 203 printf("\n"); 204 printf(">> %s, Revision %s\n", bootprog_name, bootprog_rev); 205 printf(">> (%s, %s)\n", bootprog_maker, bootprog_date); 206 207 /* 208 * Figure out what version of Open Firmware... 209 */ 210 if ((openprom = OF_finddevice("/openprom")) != -1) { 211 char model[32]; 212 213 memset(model, 0, sizeof model); 214 OF_getprop(openprom, "model", model, sizeof model); 215 for (cp = model; *cp; cp++) 216 if (*cp >= '0' && *cp <= '9') { 217 ofw_version = *cp - '0'; 218 break; 219 } 220 #if 0 221 printf(">> Open Firmware version %d.x\n", ofw_version); 222 #endif 223 } 224 225 /* 226 * Get the boot arguments from Openfirmware 227 */ 228 if ((chosen = OF_finddevice("/chosen")) == -1 || 229 OF_getprop(chosen, "bootpath", bootdev, sizeof bootdev) < 0 || 230 OF_getprop(chosen, "bootargs", bootline, sizeof bootline) < 0) { 231 printf("Invalid Openfirmware environment\n"); 232 OF_exit(); 233 } 234 235 /* 236 * Some versions of Openfirmware sets bootpath to "". 237 * We use boot-device instead if it occurs. 238 */ 239 if (bootdev[0] == 0) { 240 printf("Cannot use bootpath\n"); 241 if ((options = OF_finddevice("/options")) == -1 || 242 OF_getprop(options, "boot-device", bootdev, 243 sizeof bootdev) < 0) { 244 printf("Invalid Openfirmware environment\n"); 245 OF_exit(); 246 } 247 printf("Using boot-device instead\n"); 248 } 249 250 prom2boot(bootdev); 251 parseargs(bootline, &boothowto); 252 DPRINTF("bootline=%s\n", bootline); 253 254 for (;;) { 255 int i; 256 257 if (boothowto & RB_ASKNAME) { 258 printf("Boot: "); 259 gets(bootline); 260 parseargs(bootline, &boothowto); 261 } 262 263 if (bootline[0]) { 264 kernels[0] = bootline; 265 kernels[1] = NULL; 266 } 267 268 for (i = 0; kernels[i]; i++) { 269 DPRINTF("Trying %s\n", kernels[i]); 270 271 marks[MARK_START] = 0; 272 if (loadfile(kernels[i], marks, LOAD_KERNEL) >= 0) 273 goto loaded; 274 } 275 boothowto |= RB_ASKNAME; 276 } 277 loaded: 278 279 #ifdef __notyet__ 280 OF_setprop(chosen, "bootpath", opened_name, strlen(opened_name) + 1); 281 cp = bootline; 282 #else 283 strcpy(bootline, opened_name); 284 cp = bootline + strlen(bootline); 285 *cp++ = ' '; 286 #endif 287 *cp = '-'; 288 if (boothowto & RB_ASKNAME) 289 *++cp = 'a'; 290 if (boothowto & RB_SINGLE) 291 *++cp = 's'; 292 if (boothowto & RB_KDB) 293 *++cp = 'd'; 294 if (*cp == '-') 295 #ifdef __notyet__ 296 *cp = 0; 297 #else 298 *--cp = 0; 299 #endif 300 else 301 *++cp = 0; 302 #ifdef __notyet__ 303 OF_setprop(chosen, "bootargs", bootline, strlen(bootline) + 1); 304 #endif 305 306 entry = marks[MARK_ENTRY]; 307 ssym = (void *)marks[MARK_SYM]; 308 esym = (void *)marks[MARK_END]; 309 310 printf(" start=0x%x\n", entry); 311 __syncicache((void *)entry, (u_int)ssym - (u_int)entry); 312 chain((void *)entry, bootline, ssym, esym); 313 314 OF_exit(); 315 } 316
Indexes created Mon Oct 13 21:09:55 GMT 2025