1 /* $NetBSD: boot.c,v 1.8 2011/02/20 07:52:43 matt Exp $ */ 2 3 /*- 4 * Copyright (c) 1999 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jonathan Stone, Michael Hitch and Simon Burge. 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1992, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * This code is derived from software contributed to Berkeley by 37 * Ralph Campbell. 38 * 39 * Redistribution and use in source and binary forms, with or without 40 * modification, are permitted provided that the following conditions 41 * are met: 42 * 1. Redistributions of source code must retain the above copyright 43 * notice, this list of conditions and the following disclaimer. 44 * 2. Redistributions in binary form must reproduce the above copyright 45 * notice, this list of conditions and the following disclaimer in the 46 * documentation and/or other materials provided with the distribution. 47 * 3. Neither the name of the University nor the names of its contributors 48 * may be used to endorse or promote products derived from this software 49 * without specific prior written permission. 50 * 51 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 52 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 53 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 54 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 55 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 56 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 57 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 58 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 59 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 60 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 61 * SUCH DAMAGE. 62 * 63 * @(#)boot.c 8.1 (Berkeley) 6/10/93 64 */ 65 66 #include <lib/libsa/stand.h> 67 #include <lib/libsa/loadfile.h> 68 #include <lib/libkern/libkern.h> 69 70 #include <sys/param.h> 71 #include <sys/exec.h> 72 #include <sys/exec_elf.h> 73 #include <sys/boot_flag.h> 74 75 #include <dev/arcbios/arcbios.h> 76 77 #include "common.h" 78 #include "bootinfo.h" 79 80 #ifdef BOOT_DEBUG 81 #define DPRINTF if (debug) printf 82 #else 83 #define DPRINTF while (/*CONSTCOND*/0) printf 84 #endif 85 86 /* 87 * We won't go overboard with gzip'd kernel names. After all we can 88 * still boot a gzip'd kernel called "netbsd.arc" - it doesn't need 89 * the .gz suffix. 90 * 91 * For arcane reasons, the first byte of the first element of this struct will 92 * contain a zero. We therefore start from one. 93 */ 94 95 char *kernelnames[] = { 96 "placekeeper", 97 "netbsd.arc", 98 "netbsd", 99 "netbsd.gz", 100 "netbsd.bak", 101 "netbsd.old", 102 "onetbsd", 103 "gennetbsd", 104 NULL 105 }; 106 107 static int debug = 0; 108 static char **environment; 109 110 /* Storage must be static. */ 111 struct btinfo_symtab bi_syms; 112 struct btinfo_bootpath bi_bpath; 113 114 static char bootinfo[BOOTINFO_SIZE]; 115 116 int main(int, char **); 117 static char *firmware_getenv(char *); 118 119 /* 120 * This gets arguments from the ARCS monitor, calls ARCS routines to open 121 * and load the program to boot, then transfers execution to the new program. 122 * 123 * argv[0] will be the ARCS path to the bootloader (i.e., 124 * "scsi(0)disk(2)rdisk(0)partition(1)\boot"). 125 * 126 * argv[1] through argv[n] will contain arguments passed from the PROM, if any. 127 */ 128 129 int 130 main(int argc, char **argv) 131 { 132 const char *kernel = NULL; 133 const char *bootpath = NULL; 134 char bootfile[PATH_MAX]; 135 void (*entry)(int, char *[], u_int, void *); 136 u_long marks[MARK_MAX]; 137 int win = 0; 138 int i; 139 int ch; 140 141 /* print a banner */ 142 printf("\n"); 143 printf("%s Bootstrap, Revision %s\n", bootprog_name, bootprog_rev); 144 145 memset(marks, 0, sizeof marks); 146 147 /* initialise bootinfo structure early */ 148 bi_init(bootinfo); 149 150 #ifdef BOOT_DEBUG 151 for (i = 0; i < argc; i++) 152 printf("argv[%d] = %s\n", i, argv[i]); 153 #endif 154 155 /* Parse arguments, if present. */ 156 while ((ch = getopt(argc, argv, "v")) != -1) { 157 switch (ch) { 158 case 'v': 159 debug = 1; 160 break; 161 } 162 } 163 164 environment = &argv[1]; 165 166 bootpath = firmware_getenv("OSLoadPartition"); 167 if (bootpath == NULL) 168 bootpath = 169 arcbios_GetEnvironmentVariable("OSLoadPartition"); 170 171 if (bootpath == NULL) { 172 /* XXX need to actually do the fixup */ 173 printf("OSLoadPartition is not specified.\n"); 174 return 0; 175 } 176 DPRINTF("bootpath = %s\n", bootpath); 177 178 /* 179 * Grab OSLoadFilename from ARCS. 180 */ 181 182 kernel = firmware_getenv("OSLoadFilename"); 183 if (kernel == NULL) 184 kernel = arcbios_GetEnvironmentVariable("OSLoadFilename"); 185 186 DPRINTF("kernel = %s\n", kernel ? kernel : "<null>"); 187 188 /* 189 * The first arg is assumed to contain the name of the kernel to boot, 190 * if it a) does not start with a hyphen and b) does not contain 191 * an equals sign. 192 */ 193 194 for (i = 1; i < argc; i++) { 195 if (((strchr(argv[i], '=')) == NULL) && (argv[i][0] != '-')) { 196 kernel = argv[i]; 197 break; 198 } 199 } 200 201 if (kernel != NULL) { 202 /* 203 * if the name contains parenthesis, we assume that it 204 * contains the bootpath and ignore anything passed through 205 * the environment 206 */ 207 if (strchr(kernel, '(')) 208 win = loadfile(kernel, marks, LOAD_KERNEL); 209 else { 210 strcpy(bootfile, bootpath); 211 strcat(bootfile, kernel); 212 win = loadfile(bootfile, marks, LOAD_KERNEL); 213 } 214 215 } else { 216 i = 1; 217 while (kernelnames[i] != NULL) { 218 strcpy(bootfile, bootpath); 219 strcat(bootfile, kernelnames[i]); 220 kernel = kernelnames[i]; 221 win = loadfile(bootfile, marks, LOAD_KERNEL); 222 if (win != -1) 223 break; 224 i++; 225 } 226 227 } 228 229 if (win < 0) { 230 printf("Boot failed! Halting...\n"); 231 (void)getchar(); 232 return 0; 233 } 234 235 strlcpy(bi_bpath.bootpath, kernel, BTINFO_BOOTPATH_LEN); 236 bi_add(&bi_bpath, BTINFO_BOOTPATH, sizeof(bi_bpath)); 237 238 bi_syms.nsym = marks[MARK_NSYM]; 239 bi_syms.ssym = marks[MARK_SYM]; 240 bi_syms.esym = marks[MARK_END]; 241 bi_add(&bi_syms, BTINFO_SYMTAB, sizeof(bi_syms)); 242 243 entry = (void *)marks[MARK_ENTRY]; 244 245 if (debug) { 246 printf("Starting at %p\n\n", entry); 247 printf("nsym 0x%lx ssym 0x%lx esym 0x%lx\n", marks[MARK_NSYM], 248 marks[MARK_SYM], marks[MARK_END]); 249 } 250 (*entry)(argc, argv, BOOTINFO_MAGIC, bootinfo); 251 252 printf("Kernel returned! Halting...\n"); 253 return 0; 254 } 255 256 char * 257 firmware_getenv(char *envname) 258 { 259 char **env; 260 int len; 261 262 len = strlen(envname); 263 264 for (env = environment; env[0]; env++) { 265 if (strncasecmp(envname, env[0], len) == 0 && 266 env[0][len] == '=') { 267 return &env[0][len + 1]; 268 } 269 } 270 return NULL; 271 } 272 273 void 274 _rtt(void) 275 { 276 277 arcbios_Halt(); 278 } 279
Indexes created Sat Sep 20 22:09:52 GMT 2025