boot.c revision 1.11
1 /* $NetBSD: boot.c,v 1.11 2001/10/23 03:31:26 thorpej 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 (/*CONSTCOND*/0) printf 102 #endif 103 104 char bootdev[128]; 105 char bootfile[128]; 106 int boothowto; 107 int debug; 108 109 static int ofw_version = 0; 110 static char *kernels[] = { "/netbsd", "/netbsd.gz", "/netbsd.ofppc", NULL }; 111 112 static void 113 prom2boot(dev) 114 char *dev; 115 { 116 char *cp, *ocp; 117 118 ocp = cp; 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(str, howtop) 130 char *str; 131 int *howtop; 132 { 133 char *cp; 134 135 /* Allow user to drop back to the PROM. */ 136 if (strcmp(str, "exit") == 0) 137 OF_exit(); 138 139 *howtop = 0; 140 141 for (cp = str; *cp; cp++) 142 if (*cp == ' ' || *cp == '-') 143 goto found; 144 145 return; 146 147 found: 148 *cp++ = '\0'; 149 while (*cp) 150 BOOT_FLAG(*cp++, *howtop); 151 } 152 153 static void 154 chain(entry, args, ssym, esym) 155 void (*entry)(); 156 char *args; 157 void *ssym, *esym; 158 { 159 extern char end[], *cp; 160 u_int l, magic = 0x19730224; 161 162 freeall(); 163 164 /* 165 * Stash pointer to start and end of symbol table after the argument 166 * strings. 167 */ 168 l = strlen(args) + 1; 169 l = (l + 3) & ~3; /* align */ 170 DPRINTF("magic @ %p\n", args + l); 171 memcpy(args + l, &magic, sizeof(magic)); 172 l += sizeof(magic); 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("args + l -> %p\n", args + l); 180 181 OF_chain((void *)RELOC, end - (char *)RELOC, entry, args, l); 182 panic("chain"); 183 } 184 185 __dead void 186 _rtt() 187 { 188 189 OF_exit(); 190 } 191 192 void 193 main() 194 { 195 extern char bootprog_name[], bootprog_rev[], 196 bootprog_maker[], bootprog_date[]; 197 int chosen, options; 198 char bootline[512]; /* Should check size? */ 199 char *cp; 200 u_long marks[MARK_MAX]; 201 u_int32_t entry; 202 void *ssym, *esym; 203 204 printf("\n"); 205 printf(">> %s, Revision %s\n", bootprog_name, bootprog_rev); 206 printf(">> (%s, %s)\n", bootprog_maker, bootprog_date); 207 208 /* 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 prom2boot(bootdev); 219 parseargs(bootline, &boothowto); 220 DPRINTF("bootline=%s\n", bootline); 221 222 for (;;) { 223 int i; 224 225 if (boothowto & RB_ASKNAME) { 226 printf("Boot: "); 227 gets(bootline); 228 parseargs(bootline, &boothowto); 229 } 230 231 if (bootline[0]) { 232 kernels[0] = bootline; 233 kernels[1] = NULL; 234 } 235 236 for (i = 0; kernels[i]; i++) { 237 DPRINTF("Trying %s\n", kernels[i]); 238 239 marks[MARK_START] = 0; 240 if (loadfile(kernels[i], marks, LOAD_KERNEL) >= 0) 241 goto loaded; 242 } 243 244 boothowto |= RB_ASKNAME; 245 } 246 loaded: 247 248 #ifdef __notyet__ 249 OF_setprop(chosen, "bootpath", opened_name, strlen(opened_name) + 1); 250 cp = bootline; 251 #else 252 strcpy(bootline, opened_name); 253 cp = bootline + strlen(bootline); 254 *cp++ = ' '; 255 #endif 256 *cp = '-'; 257 if (boothowto & RB_ASKNAME) 258 *++cp = 'a'; 259 if (boothowto & RB_SINGLE) 260 *++cp = 's'; 261 if (boothowto & RB_KDB) 262 *++cp = 'd'; 263 if (*cp == '-') 264 #ifdef __notyet__ 265 *cp = 0; 266 #else 267 *--cp = 0; 268 #endif 269 else 270 *++cp = 0; 271 #ifdef __notyet__ 272 OF_setprop(chosen, "bootargs", bootline, strlen(bootline) + 1); 273 #endif 274 275 entry = marks[MARK_ENTRY]; 276 ssym = (void *)marks[MARK_SYM]; 277 esym = (void *)marks[MARK_END]; 278 279 printf(" start=0x%x\n", entry); 280 __syncicache((void *)entry, (u_int)ssym - (u_int)entry); 281 chain((void *)entry, bootline, ssym, esym); 282 283 OF_exit(); 284 } 285
Indexes created Wed Oct 29 18:09:52 GMT 2025