boot.c revision 1.10
1/* $NetBSD: boot.c,v 1.10 2014/02/14 16:04:44 christos 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, Simon Burge and Wayne Knowles. 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/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.mipsco" - it doesn't need 82 * the .gz suffix. 83 */ 84char *kernelnames[] = { 85 "netbsd", 86 "netbsd.gz", 87 "netbsd.bak", 88 "netbsd.old", 89 "netbsd.mipsco", 90 "netbsd.elf", 91 NULL 92}; 93 94 95static char *devsplit(char *, char *); 96int main(int, char **); 97 98/* 99 * This gets arguments from the first stage boot lader, calls PROM routines 100 * to open and load the program to boot, and then transfers execution to 101 * that new program. 102 */ 103int 104main(int argc, char **argv) 105{ 106 char *name, **namep, *dev, *kernel; 107 char bootname[PATH_MAX], bootpath[PATH_MAX]; 108 int win; 109 u_long marks[MARK_MAX]; 110 struct btinfo_symtab bi_syms; 111 struct btinfo_bootpath bi_bpath; 112 extern void prom_init(void); 113 void (*entry)(int, char **, char **, u_int, char *); 114 115 prom_init(); 116 117 /* print a banner */ 118 printf("\n"); 119 printf("NetBSD/mipsco " NETBSD_VERS " " BOOT_TYPE_NAME 120 " Bootstrap, Revision %s\n", bootprog_rev); 121 122 /* initialise bootinfo structure early */ 123 bi_init(BOOTINFO_ADDR); 124 125 dev = name = NULL; 126 if (argc > 1) { 127 kernel = devsplit(argv[1], bootname); 128 if (*bootname) { 129 dev = bootname; 130 if (*kernel) 131 name = argv[1]; 132 ++argv; 133 --argc; 134 } 135 136 } else 137 kernel = NULL; 138 139 if (dev == NULL) { 140 (void) devsplit(argv[0], bootname); 141 dev = bootname; 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 || !kernel) 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 = (void *) 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", (u_int)entry); 174 175 (*entry)(argc, argv, NULL, BOOTINFO_MAGIC, (char *)BOOTINFO_ADDR); 176 177 (void)printf("KERNEL RETURNED!\n"); 178 179fail: 180 (void)printf("Boot failed! Halting...\n"); 181 return (0); 182} 183 184/* 185 * strip out device name and kernel name 186 */ 187static char * 188devsplit(char *fname, char *devname) 189{ 190 char *src, *dst; 191 192 dst = devname; 193 for (src = fname; *src;/**/) 194 if ((*dst++ = *src++) == ')') { 195 *dst = (char) 0; 196 return src; 197 } 198 *devname = (char) 0; 199 return fname; 200} 201