FreeBSD/Linux Kernel Cross Reference
sys/mips/malta/yamon.c
1 /*-
2 * Copyright (c) 2006-2008 Bruce M. Simpson
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions, and the following disclaimer,
10 * without modification, immediately at the beginning of the file.
11 * 2. The name of the author may not be used to endorse or promote products
12 * derived from this software without specific prior written permission.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
18 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 */
27
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD: releng/9.2/sys/mips/malta/yamon.c 202175 2010-01-12 21:36:08Z imp $");
30
31 #include <sys/param.h>
32 #include <sys/systm.h>
33
34 #include <mips/malta/yamon.h>
35
36 char *
37 yamon_getenv(char *name)
38 {
39 char *value;
40 yamon_env_t *p;
41
42 value = NULL;
43 for (p = *fenvp; p->name != NULL; ++p) {
44 if (!strcmp(name, p->name)) {
45 value = p->value;
46 break;
47 }
48 }
49
50 return (value);
51 }
52
53 uint32_t
54 yamon_getcpufreq(void)
55 {
56 uint32_t freq;
57 int ret;
58
59 ret = YAMON_SYSCON_READ(SYSCON_BOARD_CPU_CLOCK_FREQ_ID, &freq,
60 sizeof(freq));
61 if (ret != 0)
62 freq = 0;
63
64 return (freq);
65 }
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