1 /* $NetBSD: boot.c,v 1.12 2002/09/18 01:45:04 chs 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 char *kernels[] = { "/netbsd.ofppc", "/netbsd", "/netbsd.gz", NULL }; 110 111 static void 112 prom2boot(dev) 113 char *dev; 114 { 115 char *cp, *ocp; 116 117 ocp = cp; 118 cp = dev + strlen(dev) - 1; 119 for (; cp >= ocp; cp--) { 120 if (*cp == ':') { 121 *cp = '\0'; 122 return; 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 if (strcmp(str, "halt") == 0) 138 OF_exit(); 139 if (strcmp(str, "reboot") == 0) 140 OF_boot(""); 141 142 *howtop = 0; 143 144 for (cp = str; *cp; cp++) 145 if (*cp == ' ' || *cp == '-') 146 goto found; 147 148 return; 149 150 found: 151 *cp++ = '\0'; 152 while (*cp) 153 BOOT_FLAG(*cp++, *howtop); 154 } 155 156 static void 157 chain(entry, args, ssym, esym) 158 void (*entry)(); 159 char *args; 160 void *ssym, *esym; 161 { 162 extern char end[], *cp; 163 u_int l, magic = 0x19730224; 164 165 freeall(); 166 167 /* 168 * Stash pointer to start and end of symbol table after the argument 169 * strings. 170 */ 171 l = strlen(args) + 1; 172 l = (l + 3) & ~3; /* align */ 173 DPRINTF("magic @ %p\n", args + l); 174 memcpy(args + l, &magic, sizeof(magic)); 175 l += sizeof(magic); 176 DPRINTF("ssym @ %p\n", args + l); 177 memcpy(args + l, &ssym, sizeof(ssym)); 178 l += sizeof(ssym); 179 DPRINTF("esym @ %p\n", args + l); 180 memcpy(args + l, &esym, sizeof(esym)); 181 l += sizeof(esym); 182 DPRINTF("args + l -> %p\n", args + l); 183 184 OF_chain((void *)RELOC, end - (char *)RELOC, entry, args, l); 185 panic("chain"); 186 } 187 188 __dead void 189 _rtt() 190 { 191 192 OF_exit(); 193 } 194 195 void 196 main() 197 { 198 extern char bootprog_name[], bootprog_rev[], 199 bootprog_maker[], bootprog_date[]; 200 int chosen, options; 201 char bootline[512]; /* Should check size? */ 202 char *cp; 203 u_long marks[MARK_MAX]; 204 u_int32_t entry; 205 void *ssym, *esym; 206 207 printf("\n"); 208 printf(">> %s, Revision %s\n", bootprog_name, bootprog_rev); 209 printf(">> (%s, %s)\n", bootprog_maker, bootprog_date); 210 211 /* 212 * Get the boot arguments from Openfirmware 213 */ 214 if ((chosen = OF_finddevice("/chosen")) == -1 || 215 OF_getprop(chosen, "bootpath", bootdev, sizeof bootdev) < 0 || 216 OF_getprop(chosen, "bootargs", bootline, sizeof bootline) < 0) { 217 printf("Invalid Openfirmware environment\n"); 218 OF_exit(); 219 } 220 221 prom2boot(bootdev); 222 parseargs(bootline, &boothowto); 223 DPRINTF("bootline=%s\n", bootline); 224 225 for (;;) { 226 int i; 227 228 if (boothowto & RB_ASKNAME) { 229 printf("Boot: "); 230 gets(bootline); 231 parseargs(bootline, &boothowto); 232 } 233 234 if (bootline[0]) { 235 kernels[0] = bootline; 236 kernels[1] = NULL; 237 } 238 239 for (i = 0; kernels[i]; i++) { 240 DPRINTF("Trying %s\n", kernels[i]); 241 242 marks[MARK_START] = 0; 243 if (loadfile(kernels[i], marks, LOAD_KERNEL) >= 0) 244 goto loaded; 245 } 246 247 boothowto |= RB_ASKNAME; 248 } 249 loaded: 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