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
main(int argc,char ** argv)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 *
firmware_getenv(char * envname)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
_rtt(void)274 _rtt(void)
275 {
276
277 arcbios_Halt();
278 }
279