boot.c revision 1.19
1 /* $NetBSD: boot.c,v 1.19 2011/01/22 19:19:21 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 74 #include <machine/dec_prom.h> 75 76 #include "common.h" 77 #include "bootinfo.h" 78 79 /* 80 * We won't go overboard with gzip'd kernel names. After all we can 81 * still boot a gzip'd kernel called "netbsd.pmax" - it doesn't need 82 * the .gz suffix. 83 */ 84 char *kernelnames[] = { 85 "netbsd.pmax", 86 "netbsd", "netbsd.gz", 87 "netbsd.bak", 88 "netbsd.old", 89 "onetbsd", 90 "gennetbsd", 91 #ifdef notyet 92 "netbsd.el", 93 #endif /*notyet*/ 94 NULL 95 }; 96 97 98 static char *devname(char *); 99 int main(int, char **); 100 101 /* 102 * This gets arguments from the first stage boot lader, calls PROM routines 103 * to open and load the program to boot, and then transfers execution to 104 * that new program. 105 * 106 * Argv[0] should be something like "rz(0,0,0)netbsd" on a DECstation 3100. 107 * Argv[0,1] should be something like "boot 5/rz0/netbsd" on a DECstation 5000. 108 * The argument "-a" means netbsd should do an automatic reboot. 109 */ 110 int 111 main(int argc, char **argv) 112 { 113 char *name, **namep, *dev, *kernel; 114 char bootname[PATH_MAX], bootpath[PATH_MAX]; 115 int entry, win; 116 u_long marks[MARK_MAX]; 117 struct btinfo_symtab bi_syms; 118 struct btinfo_bootpath bi_bpath; 119 120 /* print a banner */ 121 printf("\n"); 122 printf("NetBSD/pmax " NETBSD_VERS " " BOOT_TYPE_NAME " Bootstrap, Revision %s\n", 123 bootprog_rev); 124 printf("\n"); 125 126 /* initialise bootinfo structure early */ 127 bi_init(BOOTINFO_ADDR); 128 129 /* check for DS5000 boot */ 130 if (strcmp(argv[0], "boot") == 0) { 131 argc--; 132 argv++; 133 } 134 name = argv[0]; 135 printf("Boot: %s\n", name); 136 137 /* NOTE: devname() can modify bootname[]. */ 138 strcpy(bootname, argv[0]); 139 if ((kernel = devname(bootname)) == NULL) { 140 dev = bootname; 141 name = NULL; 142 } 143 144 memset(marks, 0, sizeof marks); 145 if (name != NULL) 146 win = (loadfile(name, marks, LOAD_KERNEL) == 0); 147 else { 148 win = 0; 149 for (namep = kernelnames, win = 0; *namep != NULL && !win; 150 namep++) { 151 kernel = *namep; 152 strcpy(bootpath, dev); 153 strcat(bootpath, kernel); 154 printf("Loading: %s\n", bootpath); 155 win = (loadfile(bootpath, marks, LOAD_ALL) != -1); 156 if (win) { 157 name = bootpath; 158 } 159 } 160 } 161 if (!win) 162 goto fail; 163 164 strncpy(bi_bpath.bootpath, kernel, BTINFO_BOOTPATH_LEN); 165 bi_add(&bi_bpath, BTINFO_BOOTPATH, sizeof(bi_bpath)); 166 167 entry = marks[MARK_ENTRY]; 168 bi_syms.nsym = marks[MARK_NSYM]; 169 bi_syms.ssym = marks[MARK_SYM]; 170 bi_syms.esym = marks[MARK_END]; 171 bi_add(&bi_syms, BTINFO_SYMTAB, sizeof(bi_syms)); 172 173 printf("Starting at 0x%x\n\n", entry); 174 if (callv == &callvec) 175 startprog(entry, entry, argc, argv, 0, 0, 176 BOOTINFO_MAGIC, BOOTINFO_ADDR); 177 else 178 startprog(entry, entry, argc, argv, DEC_PROM_MAGIC, 179 callv, BOOTINFO_MAGIC, BOOTINFO_ADDR); 180 (void)printf("KERNEL RETURNED!\n"); 181 182 fail: 183 (void)printf("Boot failed! Halting...\n"); 184 return (0); 185 } 186 187 188 /* 189 * Check whether or not fname is a device name only or a full 190 * bootpath including the kernel name. This code to do this 191 * is copied from loadfile() in the first stage bootblocks. 192 * Returns the kernel name, or NULL if no kernel name specified. 193 * 194 * NOTE: fname will be modified if it's of the form N/rzY 195 * without a trailing slash. 196 */ 197 static char * 198 devname(char *fname) 199 { 200 char c; 201 202 while ((c = *fname++) != '\0') { 203 if (c == ')') 204 break; 205 if (c != '/') 206 continue; 207 while ((c = *fname++) != '\0') 208 if (c == '/') 209 break; 210 /* 211 * Make "N/rzY" with no trailing '/' valid by adding 212 * the extra '/' before appending 'boot.pmax' to the path. 213 */ 214 if (c != '/') { 215 fname--; 216 *fname++ = '/'; 217 *fname = '\0'; 218 } 219 break; 220 } 221 return (*fname == '\0' ? NULL : fname); 222 } 223
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