boot.c revision 1.7
1 /* $NetBSD: boot.c,v 1.7 1999/08/03 07:08:36 tsubai 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 88 #include <lib/libsa/stand.h> 89 #include <lib/libsa/loadfile.h> 90 #include <lib/libkern/libkern.h> 91 92 #include <machine/cpu.h> 93 #include <machine/machine_type.h> 94 95 #include "ofdev.h" 96 #include "openfirm.h" 97 98 char bootdev[128]; 99 char bootfile[128]; 100 int boothowto; 101 int debug; 102 103 static ofw_version = 0; 104 105 static void 106 prom2boot(dev) 107 char *dev; 108 { 109 char *cp; 110 111 cp = dev + strlen(dev) - 1; 112 for (; *cp; cp--) { 113 if (*cp == ':') { 114 if (ofw_version < 3) { 115 /* sd@0:0 -> sd@0 */ 116 *cp = 0; 117 break; 118 } else { 119 /* disk@0:5,boot -> disk@0:0 */ 120 strcpy(cp, ":0"); 121 break; 122 } 123 } 124 } 125 } 126 127 static void 128 parseargs(str, howtop) 129 char *str; 130 int *howtop; 131 { 132 char *cp; 133 134 /* Allow user to drop back to the PROM. */ 135 if (strcmp(str, "exit") == 0) 136 OF_exit(); 137 138 *howtop = 0; 139 140 cp = str; 141 if (*cp == '-') 142 goto found; 143 for (cp = str; *cp; cp++) 144 if (*cp == ' ') 145 goto found; 146 return; 147 148 found: 149 *cp++ = 0; 150 while (*cp) { 151 switch (*cp++) { 152 case 'a': 153 *howtop |= RB_ASKNAME; 154 break; 155 case 's': 156 *howtop |= RB_SINGLE; 157 break; 158 case 'd': 159 *howtop |= RB_KDB; 160 debug = 1; 161 break; 162 } 163 } 164 } 165 166 static void 167 chain(entry, args, ssym, esym) 168 void (*entry)(); 169 char *args; 170 void *ssym, *esym; 171 { 172 extern char end[]; 173 int l, machine_tag; 174 175 freeall(); 176 177 /* 178 * Stash pointer to end of symbol table after the argument 179 * strings. 180 */ 181 l = strlen(args) + 1; 182 bcopy(&ssym, args + l, sizeof(ssym)); 183 l += sizeof(ssym); 184 bcopy(&esym, args + l, sizeof(esym)); 185 l += sizeof(esym); 186 187 /* 188 * Tell the kernel we're an OpenFirmware system. 189 */ 190 machine_tag = POWERPC_MACHINE_OPENFIRMWARE; 191 bcopy(&machine_tag, args + l, sizeof(machine_tag)); 192 l += sizeof(machine_tag); 193 194 OF_chain((void *)RELOC, end - (char *)RELOC, entry, args, l); 195 panic("chain"); 196 } 197 198 __dead void 199 _rtt() 200 { 201 202 OF_exit(); 203 } 204 205 void 206 main() 207 { 208 extern char bootprog_name[], bootprog_rev[], 209 bootprog_maker[], bootprog_date[]; 210 int chosen, options, openprom; 211 char bootline[512]; /* Should check size? */ 212 char *cp; 213 u_long marks[MARK_MAX]; 214 u_int32_t entry; 215 void *ssym, *esym; 216 217 printf("\n"); 218 printf(">> %s, Revision %s\n", bootprog_name, bootprog_rev); 219 printf(">> (%s, %s)\n", bootprog_maker, bootprog_date); 220 221 /* 222 * Figure out what version of Open Firmware... 223 */ 224 if ((openprom = OF_finddevice("/openprom")) != -1) { 225 char model[32]; 226 227 bzero(model, sizeof model); 228 OF_getprop(openprom, "model", model, sizeof model); 229 for (cp = model; *cp; cp++) 230 if (*cp >= '0' && *cp <= '9') { 231 ofw_version = *cp - '0'; 232 break; 233 } 234 #if 0 235 printf(">> Open Firmware version %d.x\n", ofw_version); 236 #endif 237 } 238 239 /* 240 * Get the boot arguments from Openfirmware 241 */ 242 if ((chosen = OF_finddevice("/chosen")) == -1 || 243 OF_getprop(chosen, "bootpath", bootdev, sizeof bootdev) < 0 || 244 OF_getprop(chosen, "bootargs", bootline, sizeof bootline) < 0) { 245 printf("Invalid Openfirmware environment\n"); 246 OF_exit(); 247 } 248 249 /* 250 * Some versions of Openfirmware sets bootpath to "". 251 * We use boot-device instead if it occurs. 252 */ 253 if (bootdev[0] == 0) { 254 printf("Cannot use bootpath\n"); 255 if ((options = OF_finddevice("/options")) == -1 || 256 OF_getprop(options, "boot-device", bootdev, 257 sizeof bootdev) < 0) { 258 printf("Invalid Openfirmware environment\n"); 259 OF_exit(); 260 } 261 printf("Using boot-device instead\n"); 262 } 263 264 prom2boot(bootdev); 265 parseargs(bootline, &boothowto); 266 267 for (;;) { 268 if (boothowto & RB_ASKNAME) { 269 printf("Boot: "); 270 gets(bootline); 271 parseargs(bootline, &boothowto); 272 } 273 marks[MARK_START] = 0; 274 if (loadfile(bootline, marks, LOAD_ALL) >= 0) 275 break; 276 if (errno) 277 printf("open %s: %s\n", opened_name, strerror(errno)); 278 boothowto |= RB_ASKNAME; 279 } 280 #ifdef __notyet__ 281 OF_setprop(chosen, "bootpath", opened_name, strlen(opened_name) + 1); 282 cp = bootline; 283 #else 284 strcpy(bootline, opened_name); 285 cp = bootline + strlen(bootline); 286 *cp++ = ' '; 287 #endif 288 *cp = '-'; 289 if (boothowto & RB_ASKNAME) 290 *++cp = 'a'; 291 if (boothowto & RB_SINGLE) 292 *++cp = 's'; 293 if (boothowto & RB_KDB) 294 *++cp = 'd'; 295 if (*cp == '-') 296 #ifdef __notyet__ 297 *cp = 0; 298 #else 299 *--cp = 0; 300 #endif 301 else 302 *++cp = 0; 303 #ifdef __notyet__ 304 OF_setprop(chosen, "bootargs", bootline, strlen(bootline) + 1); 305 #endif 306 307 entry = marks[MARK_ENTRY]; 308 ssym = (void *)marks[MARK_SYM]; 309 esym = (void *)marks[MARK_END]; 310 311 printf(" start=0x%x\n", entry); 312 __syncicache((void *)entry, (u_int)ssym - (u_int)entry); 313 chain((void *)entry, bootline, ssym, esym); 314 315 OF_exit(); 316 } 317
Indexes created Tue Oct 14 06:10:07 GMT 2025