1 /* $NetBSD: boot.c,v 1.20 2024/03/06 19:48:53 andvar 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 loader, 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
main(int argc,char ** argv)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 *
devname(char * fname)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