boot.c revision 1.20
1 /* $NetBSD: boot.c,v 1.20 2008/02/12 04:27:46 garbled 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 "boot.h" 96 #include "ofdev.h" 97 #include "openfirm.h" 98 99 #ifdef DEBUG 100 # define DPRINTF printf 101 #else 102 # define DPRINTF while (/*CONSTCOND*/0) printf 103 #endif 104 105 char bootdev[128]; 106 char bootfile[128]; 107 int boothowto; 108 int debug; 109 110 #ifdef OFWDUMP 111 void dump_ofwtree(int); 112 #endif 113 114 static char *kernels[] = { "/netbsd.ofppc", "/netbsd", 115 "/netbsd.gz", "onetbsd", NULL }; 116 static char *kernels64[] = { "/netbsd.ofppc64", "/netbsd64", "/netbsd64.gz", 117 "onetbsd64", "/netbsd.ofppc", "/netbsd", 118 "/netbsd.gz", "onetbsd", NULL }; 119 120 static void 121 prom2boot(char *dev) 122 { 123 char *cp, *ocp; 124 125 ocp = dev; 126 cp = dev + strlen(dev) - 1; 127 for (; cp >= ocp; cp--) { 128 if (*cp == ':') { 129 *cp = '\0'; 130 return; 131 } 132 } 133 } 134 135 static void 136 parseargs(char *str, int *howtop) 137 { 138 char *cp; 139 140 /* Allow user to drop back to the PROM. */ 141 if (strcmp(str, "exit") == 0) 142 OF_exit(); 143 if (strcmp(str, "halt") == 0) 144 OF_exit(); 145 if (strcmp(str, "reboot") == 0) 146 OF_boot(""); 147 148 *howtop = 0; 149 150 for (cp = str; *cp; cp++) 151 if (*cp == ' ' || *cp == '-') 152 goto found; 153 154 return; 155 156 found: 157 *cp++ = '\0'; 158 while (*cp) 159 BOOT_FLAG(*cp++, *howtop); 160 } 161 162 static void 163 chain(boot_entry_t entry, char *args, void *ssym, void *esym) 164 { 165 extern char end[], *cp; 166 u_int l, magic = 0x19730224; 167 168 /* 169 * Stash pointer to start and end of symbol table after the argument 170 * strings. 171 */ 172 l = strlen(args) + 1; 173 DPRINTF("ssym @ %p\n", args + l); 174 memcpy(args + l, &ssym, sizeof(ssym)); 175 l += sizeof(ssym); 176 DPRINTF("esym @ %p\n", args + l); 177 memcpy(args + l, &esym, sizeof(esym)); 178 l += sizeof(esym); 179 DPRINTF("magic @ %p\n", args + l); 180 memcpy(args + l, &magic, sizeof(magic)); 181 l += sizeof(magic); 182 DPRINTF("args + l -> %p\n", args + l); 183 184 OF_chain((void *) RELOC, end - (char *)RELOC, entry, args, l); 185 panic("chain"); 186 } 187 188 __dead void 189 _rtt(void) 190 { 191 192 OF_exit(); 193 } 194 195 void 196 main(void) 197 { 198 extern char bootprog_name[], bootprog_rev[], 199 bootprog_maker[], bootprog_date[]; 200 int chosen, options, cpu, cpunode, j, is64=0; 201 char bootline[512]; /* Should check size? */ 202 char *cp; 203 u_long marks[MARK_MAX]; 204 u_int32_t entry; 205 void *ssym, *esym; 206 207 printf("\n"); 208 printf(">> %s, Revision %s\n", bootprog_name, bootprog_rev); 209 printf(">> (%s, %s)\n", bootprog_maker, bootprog_date); 210 211 #ifdef OFWDUMP 212 chosen = OF_finddevice("/"); 213 dump_ofwtree(chosen); 214 #endif 215 /* 216 * Get the boot arguments from Openfirmware 217 */ 218 if ((chosen = OF_finddevice("/chosen")) == -1 || 219 OF_getprop(chosen, "bootpath", bootdev, sizeof bootdev) < 0 || 220 OF_getprop(chosen, "bootargs", bootline, sizeof bootline) < 0) { 221 printf("Invalid Openfirmware environment\n"); 222 OF_exit(); 223 } 224 225 /* lets see if we can guess the 64bittedness */ 226 if (OF_getprop(chosen, "cpu", &cpu, sizeof cpu) == sizeof(cpu)) { 227 cpunode = OF_instance_to_package(cpu); 228 if (OF_getprop(cpunode, "64-bit", &j, sizeof j) >= 0) { 229 is64 = 1; 230 } 231 } 232 233 prom2boot(bootdev); 234 parseargs(bootline, &boothowto); 235 DPRINTF("bootline=%s\n", bootline); 236 237 for (;;) { 238 int i; 239 240 if (boothowto & RB_ASKNAME) { 241 printf("Boot: "); 242 gets(bootline); 243 parseargs(bootline, &boothowto); 244 } 245 246 if (bootline[0]) { 247 kernels[0] = bootline; 248 kernels[1] = NULL; 249 } 250 if (!bootline[0] && is64) { 251 for (i = 0; kernels64[i]; i++) { 252 DPRINTF("Trying %s\n", kernels64[i]); 253 254 marks[MARK_START] = 0; 255 if (loadfile(kernels64[i], marks, LOAD_KERNEL) >= 0) 256 goto loaded; 257 } 258 } else { 259 for (i = 0; kernels[i]; i++) { 260 DPRINTF("Trying %s\n", kernels[i]); 261 262 marks[MARK_START] = 0; 263 if (loadfile(kernels[i], marks, LOAD_KERNEL) >= 0) 264 goto loaded; 265 } 266 } 267 268 boothowto |= RB_ASKNAME; 269 } 270 loaded: 271 272 #ifdef __notyet__ 273 OF_setprop(chosen, "bootpath", opened_name, strlen(opened_name) + 1); 274 cp = bootline; 275 #else 276 strcpy(bootline, opened_name); 277 cp = bootline + strlen(bootline); 278 *cp++ = ' '; 279 #endif 280 *cp = '-'; 281 if (boothowto & RB_ASKNAME) 282 *++cp = 'a'; 283 if (boothowto & RB_SINGLE) 284 *++cp = 's'; 285 if (boothowto & RB_KDB) 286 *++cp = 'd'; 287 if (*cp == '-') 288 #ifdef __notyet__ 289 *cp = 0; 290 #else 291 *--cp = 0; 292 #endif 293 else 294 *++cp = 0; 295 #ifdef __notyet__ 296 OF_setprop(chosen, "bootargs", bootline, strlen(bootline) + 1); 297 #endif 298 299 entry = marks[MARK_ENTRY]; 300 ssym = (void *)marks[MARK_SYM]; 301 esym = (void *)marks[MARK_END]; 302 303 printf(" start=0x%x\n", entry); 304 __syncicache((void *) entry, (u_int) ssym - (u_int) entry); 305 chain((boot_entry_t) entry, bootline, ssym, esym); 306 307 OF_exit(); 308 } 309
Indexes created Sat Oct 25 16:10:12 GMT 2025