boot.c revision 1.17
1 /* $NetBSD: boot.c,v 1.17 2008/01/09 19:34:45 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 "alloc.h" 96 #include "boot.h" 97 #include "ofdev.h" 98 #include "openfirm.h" 99 100 #ifdef DEBUG 101 # define DPRINTF printf 102 #else 103 # define DPRINTF while (/*CONSTCOND*/0) printf 104 #endif 105 106 char bootdev[128]; 107 char bootfile[128]; 108 int boothowto; 109 int debug; 110 111 static char *kernels[] = { "/netbsd.ofppc", "/netbsd", "/netbsd.gz", 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; 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 /* 205 * Get the boot arguments from Openfirmware 206 */ 207 if ((chosen = OF_finddevice("/chosen")) == -1 || 208 OF_getprop(chosen, "bootpath", bootdev, sizeof bootdev) < 0 || 209 OF_getprop(chosen, "bootargs", bootline, sizeof bootline) < 0) { 210 printf("Invalid Openfirmware environment\n"); 211 OF_exit(); 212 } 213 214 prom2boot(bootdev); 215 parseargs(bootline, &boothowto); 216 DPRINTF("bootline=%s\n", bootline); 217 218 for (;;) { 219 int i; 220 221 if (boothowto & RB_ASKNAME) { 222 printf("Boot: "); 223 gets(bootline); 224 parseargs(bootline, &boothowto); 225 } 226 227 if (bootline[0]) { 228 kernels[0] = bootline; 229 kernels[1] = NULL; 230 } 231 232 for (i = 0; kernels[i]; i++) { 233 DPRINTF("Trying %s\n", kernels[i]); 234 235 marks[MARK_START] = 0; 236 if (loadfile(kernels[i], marks, LOAD_KERNEL) >= 0) 237 goto loaded; 238 } 239 240 boothowto |= RB_ASKNAME; 241 } 242 loaded: 243 244 #ifdef __notyet__ 245 OF_setprop(chosen, "bootpath", opened_name, strlen(opened_name) + 1); 246 cp = bootline; 247 #else 248 strcpy(bootline, opened_name); 249 cp = bootline + strlen(bootline); 250 *cp++ = ' '; 251 #endif 252 *cp = '-'; 253 if (boothowto & RB_ASKNAME) 254 *++cp = 'a'; 255 if (boothowto & RB_SINGLE) 256 *++cp = 's'; 257 if (boothowto & RB_KDB) 258 *++cp = 'd'; 259 if (*cp == '-') 260 #ifdef __notyet__ 261 *cp = 0; 262 #else 263 *--cp = 0; 264 #endif 265 else 266 *++cp = 0; 267 #ifdef __notyet__ 268 OF_setprop(chosen, "bootargs", bootline, strlen(bootline) + 1); 269 #endif 270 271 entry = marks[MARK_ENTRY]; 272 ssym = (void *)marks[MARK_SYM]; 273 esym = (void *)marks[MARK_END]; 274 275 printf(" start=0x%x\n", entry); 276 __syncicache((void *) entry, (u_int) ssym - (u_int) entry); 277 chain((boot_entry_t) entry, bootline, ssym, esym); 278 279 OF_exit(); 280 } 281
Indexes created Sat Oct 25 16:10:12 GMT 2025