boot.c revision 1.11
1 /* $NetBSD: boot.c,v 1.11 2001/07/22 11:29:48 wiz 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 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 BOOT_FLAG(*cp++, *howtop); 152 } 153 154 static void 155 chain(entry, args, ssym, esym) 156 void (*entry)(); 157 char *args; 158 void *ssym, *esym; 159 { 160 extern char end[]; 161 int l; 162 163 /* 164 * Stash pointer to end of symbol table after the argument 165 * strings. 166 */ 167 l = strlen(args) + 1; 168 memcpy(args + l, &ssym, sizeof(ssym)); 169 l += sizeof(ssym); 170 memcpy(args + l, &esym, sizeof(esym)); 171 l += sizeof(esym); 172 173 OF_chain((void *)RELOC, end - (char *)RELOC, entry, args, l); 174 panic("chain"); 175 } 176 177 __dead void 178 _rtt() 179 { 180 181 OF_exit(); 182 } 183 184 void 185 main() 186 { 187 extern char bootprog_name[], bootprog_rev[], 188 bootprog_maker[], bootprog_date[]; 189 int chosen, options, openprom; 190 char bootline[512]; /* Should check size? */ 191 char *cp; 192 u_long marks[MARK_MAX]; 193 u_int32_t entry; 194 void *ssym, *esym; 195 196 printf("\n"); 197 printf(">> %s, Revision %s\n", bootprog_name, bootprog_rev); 198 printf(">> (%s, %s)\n", bootprog_maker, bootprog_date); 199 200 /* 201 * Figure out what version of Open Firmware... 202 */ 203 if ((openprom = OF_finddevice("/openprom")) != -1) { 204 char model[32]; 205 206 memset(model, 0, sizeof model); 207 OF_getprop(openprom, "model", model, sizeof model); 208 for (cp = model; *cp; cp++) 209 if (*cp >= '0' && *cp <= '9') { 210 ofw_version = *cp - '0'; 211 break; 212 } 213 #if 0 214 printf(">> Open Firmware version %d.x\n", ofw_version); 215 #endif 216 } 217 218 /* 219 * Get the boot arguments from Openfirmware 220 */ 221 if ((chosen = OF_finddevice("/chosen")) == -1 || 222 OF_getprop(chosen, "bootpath", bootdev, sizeof bootdev) < 0 || 223 OF_getprop(chosen, "bootargs", bootline, sizeof bootline) < 0) { 224 printf("Invalid Openfirmware environment\n"); 225 OF_exit(); 226 } 227 228 /* 229 * Some versions of Openfirmware sets bootpath to "". 230 * We use boot-device instead if it occurs. 231 */ 232 if (bootdev[0] == 0) { 233 printf("Cannot use bootpath\n"); 234 if ((options = OF_finddevice("/options")) == -1 || 235 OF_getprop(options, "boot-device", bootdev, 236 sizeof bootdev) < 0) { 237 printf("Invalid Openfirmware environment\n"); 238 OF_exit(); 239 } 240 printf("Using boot-device instead\n"); 241 } 242 243 prom2boot(bootdev); 244 parseargs(bootline, &boothowto); 245 246 for (;;) { 247 if (boothowto & RB_ASKNAME) { 248 printf("Boot: "); 249 gets(bootline); 250 parseargs(bootline, &boothowto); 251 } 252 marks[MARK_START] = 0; 253 if (loadfile(bootline, marks, LOAD_ALL) >= 0) 254 break; 255 if (errno) 256 printf("open %s: %s\n", opened_name, strerror(errno)); 257 boothowto |= RB_ASKNAME; 258 } 259 #ifdef __notyet__ 260 OF_setprop(chosen, "bootpath", opened_name, strlen(opened_name) + 1); 261 cp = bootline; 262 #else 263 strcpy(bootline, opened_name); 264 cp = bootline + strlen(bootline); 265 *cp++ = ' '; 266 #endif 267 *cp = '-'; 268 if (boothowto & RB_ASKNAME) 269 *++cp = 'a'; 270 if (boothowto & RB_SINGLE) 271 *++cp = 's'; 272 if (boothowto & RB_KDB) 273 *++cp = 'd'; 274 if (*cp == '-') 275 #ifdef __notyet__ 276 *cp = 0; 277 #else 278 *--cp = 0; 279 #endif 280 else 281 *++cp = 0; 282 #ifdef __notyet__ 283 OF_setprop(chosen, "bootargs", bootline, strlen(bootline) + 1); 284 #endif 285 286 entry = marks[MARK_ENTRY]; 287 ssym = (void *)marks[MARK_SYM]; 288 esym = (void *)marks[MARK_END]; 289 290 printf(" start=0x%x\n", entry); 291 __syncicache((void *)entry, (u_int)ssym - (u_int)entry); 292 chain((void *)entry, bootline, ssym, esym); 293 294 OF_exit(); 295 } 296
Indexes created Mon Oct 13 21:09:55 GMT 2025