boot.c revision 1.9
1 /* $NetBSD: boot.c,v 1.9 2000/09/24 12:32:36 jdolecek 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 #include <machine/machine_type.h> 95 96 #include "ofdev.h" 97 #include "openfirm.h" 98 99 char bootdev[128]; 100 char bootfile[128]; 101 int boothowto; 102 int debug; 103 104 static ofw_version = 0; 105 106 static void 107 prom2boot(dev) 108 char *dev; 109 { 110 char *cp; 111 112 cp = dev + strlen(dev) - 1; 113 for (; *cp; cp--) { 114 if (*cp == ':') { 115 if (ofw_version < 3) { 116 /* sd@0:0 -> sd@0 */ 117 *cp = 0; 118 break; 119 } else { 120 /* disk@0:5,boot -> disk@0:0 */ 121 strcpy(cp, ":0"); 122 break; 123 } 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 cp = str; 142 if (*cp == '-') 143 goto found; 144 for (cp = str; *cp; cp++) 145 if (*cp == ' ') 146 goto found; 147 return; 148 149 found: 150 *cp++ = 0; 151 while (*cp) 152 BOOT_FLAG(*cp++, *howtop); 153 } 154 155 static void 156 chain(entry, args, ssym, esym) 157 void (*entry)(); 158 char *args; 159 void *ssym, *esym; 160 { 161 extern char end[]; 162 int l, machine_tag; 163 164 /* 165 * Stash pointer to end of symbol table after the argument 166 * strings. 167 */ 168 l = strlen(args) + 1; 169 bcopy(&ssym, args + l, sizeof(ssym)); 170 l += sizeof(ssym); 171 bcopy(&esym, args + l, sizeof(esym)); 172 l += sizeof(esym); 173 174 /* 175 * Tell the kernel we're an OpenFirmware system. 176 */ 177 machine_tag = POWERPC_MACHINE_OPENFIRMWARE; 178 bcopy(&machine_tag, args + l, sizeof(machine_tag)); 179 l += sizeof(machine_tag); 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, openprom; 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 * Figure out what version of Open Firmware... 210 */ 211 if ((openprom = OF_finddevice("/openprom")) != -1) { 212 char model[32]; 213 214 bzero(model, sizeof model); 215 OF_getprop(openprom, "model", model, sizeof model); 216 for (cp = model; *cp; cp++) 217 if (*cp >= '0' && *cp <= '9') { 218 ofw_version = *cp - '0'; 219 break; 220 } 221 #if 0 222 printf(">> Open Firmware version %d.x\n", ofw_version); 223 #endif 224 } 225 226 /* 227 * Get the boot arguments from Openfirmware 228 */ 229 if ((chosen = OF_finddevice("/chosen")) == -1 || 230 OF_getprop(chosen, "bootpath", bootdev, sizeof bootdev) < 0 || 231 OF_getprop(chosen, "bootargs", bootline, sizeof bootline) < 0) { 232 printf("Invalid Openfirmware environment\n"); 233 OF_exit(); 234 } 235 236 /* 237 * Some versions of Openfirmware sets bootpath to "". 238 * We use boot-device instead if it occurs. 239 */ 240 if (bootdev[0] == 0) { 241 printf("Cannot use bootpath\n"); 242 if ((options = OF_finddevice("/options")) == -1 || 243 OF_getprop(options, "boot-device", bootdev, 244 sizeof bootdev) < 0) { 245 printf("Invalid Openfirmware environment\n"); 246 OF_exit(); 247 } 248 printf("Using boot-device instead\n"); 249 } 250 251 prom2boot(bootdev); 252 parseargs(bootline, &boothowto); 253 254 for (;;) { 255 if (boothowto & RB_ASKNAME) { 256 printf("Boot: "); 257 gets(bootline); 258 parseargs(bootline, &boothowto); 259 } 260 marks[MARK_START] = 0; 261 if (loadfile(bootline, marks, LOAD_ALL) >= 0) 262 break; 263 if (errno) 264 printf("open %s: %s\n", opened_name, strerror(errno)); 265 boothowto |= RB_ASKNAME; 266 } 267 #ifdef __notyet__ 268 OF_setprop(chosen, "bootpath", opened_name, strlen(opened_name) + 1); 269 cp = bootline; 270 #else 271 strcpy(bootline, opened_name); 272 cp = bootline + strlen(bootline); 273 *cp++ = ' '; 274 #endif 275 *cp = '-'; 276 if (boothowto & RB_ASKNAME) 277 *++cp = 'a'; 278 if (boothowto & RB_SINGLE) 279 *++cp = 's'; 280 if (boothowto & RB_KDB) 281 *++cp = 'd'; 282 if (*cp == '-') 283 #ifdef __notyet__ 284 *cp = 0; 285 #else 286 *--cp = 0; 287 #endif 288 else 289 *++cp = 0; 290 #ifdef __notyet__ 291 OF_setprop(chosen, "bootargs", bootline, strlen(bootline) + 1); 292 #endif 293 294 entry = marks[MARK_ENTRY]; 295 ssym = (void *)marks[MARK_SYM]; 296 esym = (void *)marks[MARK_END]; 297 298 printf(" start=0x%x\n", entry); 299 __syncicache((void *)entry, (u_int)ssym - (u_int)entry); 300 chain((void *)entry, bootline, ssym, esym); 301 302 OF_exit(); 303 } 304
Indexes created Tue Oct 14 15:09:51 GMT 2025