boot.c revision 1.20.10.1
1 /* $NetBSD: boot.c,v 1.20.10.1 2008/05/16 02:22:58 yamt 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 #define ELFSIZE 32 /* We use 32-bit ELF. */ 74 75 #include <sys/param.h> 76 #include <sys/exec.h> 77 #include <sys/exec_elf.h> 78 #include <sys/reboot.h> 79 #include <sys/disklabel.h> 80 #include <sys/boot_flag.h> 81 82 #include <lib/libsa/stand.h> 83 #include <lib/libsa/loadfile.h> 84 #include <lib/libkern/libkern.h> 85 86 #include <machine/cpu.h> 87 88 #include "boot.h" 89 #include "ofdev.h" 90 #include "openfirm.h" 91 92 #ifdef DEBUG 93 # define DPRINTF printf 94 #else 95 # define DPRINTF while (/*CONSTCOND*/0) printf 96 #endif 97 98 char bootdev[128]; 99 char bootfile[128]; 100 int boothowto; 101 int debug; 102 103 #ifdef OFWDUMP 104 void dump_ofwtree(int); 105 #endif 106 107 static char *kernels[] = { "/netbsd.ofppc", "/netbsd", 108 "/netbsd.gz", "onetbsd", NULL }; 109 static char *kernels64[] = { "/netbsd.ofppc64", "/netbsd64", "/netbsd64.gz", 110 "onetbsd64", "/netbsd.ofppc", "/netbsd", 111 "/netbsd.gz", "onetbsd", NULL }; 112 113 static void 114 prom2boot(char *dev) 115 { 116 char *cp, *ocp; 117 118 ocp = dev; 119 cp = dev + strlen(dev) - 1; 120 for (; cp >= ocp; cp--) { 121 if (*cp == ':') { 122 *cp = '\0'; 123 return; 124 } 125 } 126 } 127 128 static void 129 parseargs(char *str, int *howtop) 130 { 131 char *cp; 132 133 /* Allow user to drop back to the PROM. */ 134 if (strcmp(str, "exit") == 0) 135 OF_exit(); 136 if (strcmp(str, "halt") == 0) 137 OF_exit(); 138 if (strcmp(str, "reboot") == 0) 139 OF_boot(""); 140 141 *howtop = 0; 142 143 for (cp = str; *cp; cp++) 144 if (*cp == ' ' || *cp == '-') 145 goto found; 146 147 return; 148 149 found: 150 *cp++ = '\0'; 151 while (*cp) 152 BOOT_FLAG(*cp++, *howtop); 153 } 154 155 static void 156 chain(boot_entry_t entry, char *args, void *ssym, void *esym) 157 { 158 extern char end[], *cp; 159 u_int l, magic = 0x19730224; 160 161 /* 162 * Stash pointer to start and end of symbol table after the argument 163 * strings. 164 */ 165 l = strlen(args) + 1; 166 DPRINTF("ssym @ %p\n", args + l); 167 memcpy(args + l, &ssym, sizeof(ssym)); 168 l += sizeof(ssym); 169 DPRINTF("esym @ %p\n", args + l); 170 memcpy(args + l, &esym, sizeof(esym)); 171 l += sizeof(esym); 172 DPRINTF("magic @ %p\n", args + l); 173 memcpy(args + l, &magic, sizeof(magic)); 174 l += sizeof(magic); 175 DPRINTF("args + l -> %p\n", args + l); 176 177 OF_chain((void *) RELOC, end - (char *)RELOC, entry, args, l); 178 panic("chain"); 179 } 180 181 __dead void 182 _rtt(void) 183 { 184 185 OF_exit(); 186 } 187 188 void 189 main(void) 190 { 191 extern char bootprog_name[], bootprog_rev[], 192 bootprog_maker[], bootprog_date[]; 193 int chosen, options, cpu, cpunode, j, is64=0; 194 char bootline[512]; /* Should check size? */ 195 char *cp; 196 u_long marks[MARK_MAX]; 197 u_int32_t entry; 198 void *ssym, *esym; 199 200 printf("\n"); 201 printf(">> %s, Revision %s\n", bootprog_name, bootprog_rev); 202 printf(">> (%s, %s)\n", bootprog_maker, bootprog_date); 203 204 #ifdef OFWDUMP 205 chosen = OF_finddevice("/"); 206 dump_ofwtree(chosen); 207 #endif 208 /* 209 * Get the boot arguments from Openfirmware 210 */ 211 if ((chosen = OF_finddevice("/chosen")) == -1 || 212 OF_getprop(chosen, "bootpath", bootdev, sizeof bootdev) < 0 || 213 OF_getprop(chosen, "bootargs", bootline, sizeof bootline) < 0) { 214 printf("Invalid Openfirmware environment\n"); 215 OF_exit(); 216 } 217 218 /* lets see if we can guess the 64bittedness */ 219 if (OF_getprop(chosen, "cpu", &cpu, sizeof cpu) == sizeof(cpu)) { 220 cpunode = OF_instance_to_package(cpu); 221 if (OF_getprop(cpunode, "64-bit", &j, sizeof j) >= 0) { 222 is64 = 1; 223 } 224 } 225 226 prom2boot(bootdev); 227 parseargs(bootline, &boothowto); 228 DPRINTF("bootline=%s\n", bootline); 229 230 for (;;) { 231 int i; 232 233 if (boothowto & RB_ASKNAME) { 234 printf("Boot: "); 235 gets(bootline); 236 parseargs(bootline, &boothowto); 237 } 238 239 if (bootline[0]) { 240 kernels[0] = bootline; 241 kernels[1] = NULL; 242 } 243 if (!bootline[0] && is64) { 244 for (i = 0; kernels64[i]; i++) { 245 DPRINTF("Trying %s\n", kernels64[i]); 246 247 marks[MARK_START] = 0; 248 if (loadfile(kernels64[i], marks, LOAD_KERNEL) >= 0) 249 goto loaded; 250 } 251 } else { 252 for (i = 0; kernels[i]; i++) { 253 DPRINTF("Trying %s\n", kernels[i]); 254 255 marks[MARK_START] = 0; 256 if (loadfile(kernels[i], marks, LOAD_KERNEL) >= 0) 257 goto loaded; 258 } 259 } 260 261 boothowto |= RB_ASKNAME; 262 } 263 loaded: 264 265 #ifdef __notyet__ 266 OF_setprop(chosen, "bootpath", opened_name, strlen(opened_name) + 1); 267 cp = bootline; 268 #else 269 strcpy(bootline, opened_name); 270 cp = bootline + strlen(bootline); 271 *cp++ = ' '; 272 #endif 273 *cp = '-'; 274 if (boothowto & RB_ASKNAME) 275 *++cp = 'a'; 276 if (boothowto & RB_SINGLE) 277 *++cp = 's'; 278 if (boothowto & RB_KDB) 279 *++cp = 'd'; 280 if (*cp == '-') 281 #ifdef __notyet__ 282 *cp = 0; 283 #else 284 *--cp = 0; 285 #endif 286 else 287 *++cp = 0; 288 #ifdef __notyet__ 289 OF_setprop(chosen, "bootargs", bootline, strlen(bootline) + 1); 290 #endif 291 292 entry = marks[MARK_ENTRY]; 293 ssym = (void *)marks[MARK_SYM]; 294 esym = (void *)marks[MARK_END]; 295 296 printf(" start=0x%x\n", entry); 297 __syncicache((void *) entry, (u_int) ssym - (u_int) entry); 298 chain((boot_entry_t) entry, bootline, ssym, esym); 299 300 OF_exit(); 301 } 302
Indexes created Thu Oct 23 22:10:10 GMT 2025