1 /* $NetBSD: boot.c,v 1.18 2011/01/22 19:19:23 joerg 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 /* 81 * We won't go overboard with gzip'd kernel names. After all we can 82 * still boot a gzip'd kernel called "netbsd.sgimips" - it doesn't need 83 * the .gz suffix. 84 * 85 * For arcane reasons, the first byte of the first element of this struct will 86 * contain a zero. We therefore start from one. 87 */ 88 89 const char *kernelnames[] = { 90 "placekeeper", 91 "netbsd.sgimips", 92 "netbsd", 93 "netbsd.gz", 94 "netbsd.bak", 95 "netbsd.old", 96 "onetbsd", 97 "gennetbsd", 98 NULL 99 }; 100 101 extern const struct arcbios_fv *ARCBIOS; 102 static int debug = 0; 103 104 int main(int, char **); 105 106 /* Storage must be static. */ 107 struct btinfo_symtab bi_syms; 108 struct btinfo_bootpath bi_bpath; 109 110 static uint8_t bootinfo[BOOTINFO_SIZE]; 111 112 /* 113 * This gets arguments from the ARCS monitor, calls ARCS routines to open 114 * and load the program to boot, then transfers execution to the new program. 115 * 116 * argv[0] will be the ARCS path to the bootloader (i.e., 117 * "pci(0)scsi(0)disk(2)rdisk(0)partition(8)/boot.ip3"). 118 * 119 * argv[1] through argv[n] will contain arguments passed from the PROM, if any. 120 */ 121 122 int 123 main(int argc, char **argv) 124 { 125 const char *kernel = NULL; 126 const char *bootpath = NULL; 127 char bootfile[PATH_MAX]; 128 void (*entry) (int, char *[], int, void *); 129 u_long marks[MARK_MAX]; 130 int win = 0; 131 int i; 132 int ch; 133 134 /* print a banner */ 135 printf("\n"); 136 printf("%s " NETBSD_VERS " Bootstrap, Revision %s\n", 137 bootprog_name, bootprog_rev); 138 printf("\n"); 139 140 memset(marks, 0, sizeof marks); 141 142 /* initialise bootinfo structure early */ 143 bi_init(bootinfo); 144 145 /* Parse arguments, if present. */ 146 while ((ch = getopt(argc, argv, "v")) != -1) { 147 switch (ch) { 148 case 'v': 149 debug = 1; 150 break; 151 } 152 } 153 154 /* 155 * How to find partition and file to load? 156 * 157 * If argv[0] contains the string "cdrom(", we're probably doing an 158 * install. The bootpath will therefore be partition 0 of whatever 159 * device we've booted from. Derive the install kernel name from 160 * the bootloader name ("ip3xboot", "ip2xboot", or "aoutboot"). 161 */ 162 163 if (strstr(argv[0], "cdrom(")) { 164 strcpy(bootfile, argv[0]); 165 i = (strrchr(bootfile, ')') - bootfile); 166 bootfile[i - 1] = '0'; 167 if (strstr(bootfile, "ip3x")) 168 kernel = "ip3x"; 169 else 170 kernel = "ip2x"; 171 sprintf((strrchr(bootfile, ')') + 1), kernel); 172 if ((loadfile(bootfile, marks, LOAD_KERNEL)) >= 0) 173 goto finish; 174 } 175 176 bootpath = ARCBIOS->GetEnvironmentVariable("OSLoadPartition"); 177 178 if (bootpath == NULL) { 179 /* XXX need to actually do the fixup */ 180 printf("\nPlease set the OSLoadPartition " 181 "environment variable.\n"); 182 return 0; 183 } 184 185 /* 186 * Grab OSLoadFilename from ARCS. 187 */ 188 189 kernel = ARCBIOS->GetEnvironmentVariable("OSLoadFilename"); 190 191 /* 192 * argv[1] is assumed to contain the name of the kernel to boot, 193 * if it a) does not start with a hyphen and b) does not contain 194 * an equals sign. 195 */ 196 197 if (((strchr(argv[1], '=')) == NULL) && (argv[1][0] != '-')) 198 kernel = argv[1]; 199 200 if (kernel != NULL) { 201 /* 202 * if the name contains parenthesis, we assume that it 203 * contains the bootpath and ignore anything passed through 204 * the environment 205 */ 206 if (strchr(kernel, '(')) 207 win = loadfile(kernel, marks, LOAD_KERNEL); 208 else { 209 strcpy(bootfile, bootpath); 210 strcat(bootfile, kernel); 211 win = loadfile(bootfile, marks, LOAD_KERNEL); 212 } 213 214 } else { 215 i = 1; 216 while (kernelnames[i] != NULL) { 217 strcpy(bootfile, bootpath); 218 strcat(bootfile, kernelnames[i]); 219 kernel = kernelnames[i]; 220 win = loadfile(bootfile, marks, LOAD_KERNEL); 221 if (win != -1) 222 break; 223 i++; 224 } 225 } 226 227 if (win < 0) { 228 printf("Boot failed! Halting...\n"); 229 return 0; 230 } 231 232 finish: 233 strlcpy(bi_bpath.bootpath, bootfile, BTINFO_BOOTPATH_LEN); 234 bi_add(&bi_bpath, BTINFO_BOOTPATH, sizeof(bi_bpath)); 235 236 bi_syms.nsym = marks[MARK_NSYM]; 237 bi_syms.ssym = marks[MARK_SYM]; 238 bi_syms.esym = marks[MARK_END]; 239 bi_add(&bi_syms, BTINFO_SYMTAB, sizeof(bi_syms)); 240 entry = (void *)marks[MARK_ENTRY]; 241 242 if (debug) { 243 printf("Starting at %p\n\n", entry); 244 printf("nsym 0x%lx ssym 0x%lx esym 0x%lx\n", marks[MARK_NSYM], 245 marks[MARK_SYM], marks[MARK_END]); 246 } 247 (*entry)(argc, argv, BOOTINFO_MAGIC, bootinfo); 248 249 printf("Kernel returned! Halting...\n"); 250 return 0; 251 } 252