1 /* $NetBSD: prom.c,v 1.6 2008/04/28 20:23:28 martin Exp $ */
2
3 /*
4 * Copyright (c) 2000 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by 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 #include <sys/cdefs.h>
33 __KERNEL_RCSID(0, "$NetBSD: prom.c,v 1.6 2008/04/28 20:23:28 martin Exp $");
34
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/mbuf.h>
38
39 #include <machine/cpu.h>
40 #include <machine/prom.h>
41
42 static struct mips_prom callvec;
43
44 struct mips_prom *callv;
45
46 typedef void (*funcp_t)(void);
47
48 void
prom_init(void)49 prom_init(void)
50 {
51 int i;
52 funcp_t *fp;
53
54 fp = (void *)&callvec;
55 for (i=0; i < sizeof(struct mips_prom)/sizeof(funcp_t); i++ ) {
56 fp[i] = (funcp_t)MIPS_PROM_ENTRY(i);
57 }
58 callv = &callvec;
59 }
60
61 /*
62 * Read the environment variable 'console' to determine which serial
63 * port will be used for the console.
64 */
65 int
prom_getconsole(void)66 prom_getconsole(void)
67 {
68 char *cp;
69
70 cp = MIPS_PROM(getenv)("console");
71 if (cp == NULL) {
72 MIPS_PROM(printf)("WARNING: defaulting to serial port 1\n");
73 return 1;
74 }
75 return (*cp == '0') ? 0 : 1;
76 }
77