boot.c revision 1.24
1 /* $NetBSD: boot.c,v 1.24 2016/06/11 06:35:38 dholland 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[]; 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 int chosen, cpu, cpunode, j, is64=0; 193 char bootline[512]; /* Should check size? */ 194 char *cp; 195 u_long marks[MARK_MAX]; 196 u_int32_t entry; 197 void *ssym, *esym; 198 199 printf("\n"); 200 printf(">> %s, Revision %s\n", bootprog_name, bootprog_rev); 201 202 #ifdef OFWDUMP 203 chosen = OF_finddevice("/"); 204 dump_ofwtree(chosen); 205 #endif 206 /* 207 * Get the boot arguments from Openfirmware 208 */ 209 if ((chosen = OF_finddevice("/chosen")) == -1 || 210 OF_getprop(chosen, "bootpath", bootdev, sizeof bootdev) < 0 || 211 OF_getprop(chosen, "bootargs", bootline, sizeof bootline) < 0) { 212 printf("Invalid Openfirmware environment\n"); 213 OF_exit(); 214 } 215 216 /* lets see if we can guess the 64bittedness */ 217 if (OF_getprop(chosen, "cpu", &cpu, sizeof cpu) == sizeof(cpu)) { 218 cpunode = OF_instance_to_package(cpu); 219 if (OF_getprop(cpunode, "64-bit", &j, sizeof j) >= 0) { 220 is64 = 1; 221 } 222 } 223 224 prom2boot(bootdev); 225 parseargs(bootline, &boothowto); 226 DPRINTF("bootline=%s\n", bootline); 227 228 for (;;) { 229 int i; 230 231 if (boothowto & RB_ASKNAME) { 232 printf("Boot: "); 233 kgets(bootline, sizeof(bootline)); 234 parseargs(bootline, &boothowto); 235 } 236 237 if (bootline[0]) { 238 kernels[0] = bootline; 239 kernels[1] = NULL; 240 } 241 if (!bootline[0] && is64) { 242 for (i = 0; kernels64[i]; i++) { 243 DPRINTF("Trying %s\n", kernels64[i]); 244 245 marks[MARK_START] = 0; 246 if (loadfile(kernels64[i], marks, LOAD_KERNEL) >= 0) 247 goto loaded; 248 } 249 } else { 250 for (i = 0; kernels[i]; i++) { 251 DPRINTF("Trying %s\n", kernels[i]); 252 253 marks[MARK_START] = 0; 254 if (loadfile(kernels[i], marks, LOAD_KERNEL) >= 0) 255 goto loaded; 256 } 257 } 258 259 boothowto |= RB_ASKNAME; 260 } 261 loaded: 262 263 #ifdef __notyet__ 264 OF_setprop(chosen, "bootpath", opened_name, strlen(opened_name) + 1); 265 cp = bootline; 266 #else 267 strcpy(bootline, opened_name); 268 cp = bootline + strlen(bootline); 269 *cp++ = ' '; 270 #endif 271 *cp = '-'; 272 if (boothowto & RB_ASKNAME) 273 *++cp = 'a'; 274 if (boothowto & RB_SINGLE) 275 *++cp = 's'; 276 if (boothowto & RB_KDB) 277 *++cp = 'd'; 278 if (*cp == '-') 279 #ifdef __notyet__ 280 *cp = 0; 281 #else 282 *--cp = 0; 283 #endif 284 else 285 *++cp = 0; 286 #ifdef __notyet__ 287 OF_setprop(chosen, "bootargs", bootline, strlen(bootline) + 1); 288 #endif 289 290 entry = marks[MARK_ENTRY]; 291 ssym = (void *)marks[MARK_SYM]; 292 esym = (void *)marks[MARK_END]; 293 294 printf(" start=0x%x\n", entry); 295 __syncicache((void *) entry, (u_int) ssym - (u_int) entry); 296 chain((boot_entry_t) entry, bootline, ssym, esym); 297 298 OF_exit(); 299 } 300
Indexes created Sat Oct 25 07:10:08 GMT 2025