boot.c revision 1.4.4.1
1 /* $NetBSD: boot.c,v 1.4.4.1 1999/06/21 00:51:42 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 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 void 104 prom2boot(dev) 105 char *dev; 106 { 107 char *cp; 108 109 for (cp = dev; *cp != '\0'; cp++) 110 if (*cp == ':') { 111 *cp = '\0'; 112 return; 113 } 114 } 115 116 static void 117 parseargs(str, howtop) 118 char *str; 119 int *howtop; 120 { 121 char *cp; 122 123 /* Allow user to drop back to the PROM. */ 124 if (strcmp(str, "exit") == 0) 125 OF_exit(); 126 127 *howtop = 0; 128 129 cp = str; 130 if (*cp == '-') 131 goto found; 132 for (cp = str; *cp; cp++) 133 if (*cp == ' ') 134 goto found; 135 return; 136 137 found: 138 *cp++ = 0; 139 while (*cp) { 140 switch (*cp++) { 141 case 'a': 142 *howtop |= RB_ASKNAME; 143 break; 144 case 's': 145 *howtop |= RB_SINGLE; 146 break; 147 case 'd': 148 *howtop |= RB_KDB; 149 debug = 1; 150 break; 151 } 152 } 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 freeall(); 165 166 /* 167 * Stash pointer to end of symbol table after the argument 168 * strings. 169 */ 170 l = strlen(args) + 1; 171 bcopy(&ssym, args + l, sizeof(ssym)); 172 l += sizeof(ssym); 173 bcopy(&esym, args + l, sizeof(esym)); 174 l += sizeof(esym); 175 176 /* 177 * Tell the kernel we're an OpenFirmware system. 178 */ 179 machine_tag = POWERPC_MACHINE_OPENFIRMWARE; 180 bcopy(&machine_tag, args + l, sizeof(machine_tag)); 181 l += sizeof(machine_tag); 182 183 OF_chain((void *)RELOC, end - (char *)RELOC, entry, args, l); 184 panic("chain"); 185 } 186 187 __dead void 188 _rtt() 189 { 190 191 OF_exit(); 192 } 193 194 void 195 main() 196 { 197 extern char bootprog_name[], bootprog_rev[], 198 bootprog_maker[], bootprog_date[]; 199 int chosen, options; 200 char bootline[512]; /* Should check size? */ 201 char *cp; 202 u_long marks[MARK_MAX]; 203 u_int32_t entry; 204 void *ssym, *esym; 205 206 printf("\n"); 207 printf(">> %s, Revision %s\n", bootprog_name, bootprog_rev); 208 printf(">> (%s, %s)\n", bootprog_maker, bootprog_date); 209 210 /* 211 * Get the boot arguments from Openfirmware 212 */ 213 if ((chosen = OF_finddevice("/chosen")) == -1 || 214 OF_getprop(chosen, "bootpath", bootdev, sizeof bootdev) < 0 || 215 OF_getprop(chosen, "bootargs", bootline, sizeof bootline) < 0) { 216 printf("Invalid Openfirmware environment\n"); 217 OF_exit(); 218 } 219 220 /* 221 * Some versions of Openfirmware sets bootpath to "". 222 * We use boot-device instead if it occurs. 223 */ 224 if (bootdev[0] == 0) { 225 printf("Cannot use bootpath\n"); 226 if ((options = OF_finddevice("/options")) == -1 || 227 OF_getprop(options, "boot-device", bootdev, 228 sizeof bootdev) < 0) { 229 printf("Invalid Openfirmware environment\n"); 230 OF_exit(); 231 } 232 printf("Using boot-device instead\n"); 233 } 234 235 prom2boot(bootdev); 236 parseargs(bootline, &boothowto); 237 238 for (;;) { 239 if (boothowto & RB_ASKNAME) { 240 printf("Boot: "); 241 gets(bootline); 242 parseargs(bootline, &boothowto); 243 } 244 marks[MARK_START] = 0; 245 if (loadfile(bootline, marks, LOAD_ALL) >= 0) 246 break; 247 if (errno) 248 printf("open %s: %s\n", opened_name, strerror(errno)); 249 boothowto |= RB_ASKNAME; 250 } 251 #ifdef __notyet__ 252 OF_setprop(chosen, "bootpath", opened_name, strlen(opened_name) + 1); 253 cp = bootline; 254 #else 255 strcpy(bootline, opened_name); 256 cp = bootline + strlen(bootline); 257 *cp++ = ' '; 258 #endif 259 *cp = '-'; 260 if (boothowto & RB_ASKNAME) 261 *++cp = 'a'; 262 if (boothowto & RB_SINGLE) 263 *++cp = 's'; 264 if (boothowto & RB_KDB) 265 *++cp = 'd'; 266 if (*cp == '-') 267 #ifdef __notyet__ 268 *cp = 0; 269 #else 270 *--cp = 0; 271 #endif 272 else 273 *++cp = 0; 274 #ifdef __notyet__ 275 OF_setprop(chosen, "bootargs", bootline, strlen(bootline) + 1); 276 #endif 277 278 entry = marks[MARK_ENTRY]; 279 ssym = (void *)marks[MARK_SYM]; 280 esym = (void *)marks[MARK_END]; 281 282 printf(" start=0x%x\n", entry); 283 __syncicache((void *)entry, (u_int)ssym - (u_int)entry); 284 chain((void *)entry, bootline, ssym, esym); 285 286 OF_exit(); 287 } 288
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