1 /* $NetBSD: clock.c,v 1.17 2006/09/09 03:14:18 tsutsui Exp $ */
2
3 /*
4 * Copyright (c) 1992, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This software was developed by the Computer Systems Engineering group
8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
9 * contributed to Berkeley.
10 *
11 * All advertising materials mentioning features or use of this software
12 * must display the following acknowledgement:
13 * This product includes software developed by the University of
14 * California, Lawrence Berkeley Laboratory.
15 *
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
18 * are met:
19 * 1. Redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer.
21 * 2. Redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution.
24 * 3. Neither the name of the University nor the names of its contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39 *
40 * @(#)clock.c 8.1 (Berkeley) 6/11/93
41 */
42
43 #include <sys/cdefs.h>
44 __KERNEL_RCSID(0, "$NetBSD: clock.c,v 1.17 2006/09/09 03:14:18 tsutsui Exp $");
45
46 #include <sys/param.h>
47 #include <sys/kernel.h>
48 #include <sys/systm.h>
49 #include <sys/device.h>
50
51 #include <news68k/news68k/clockvar.h>
52
53 #include <machine/cpu.h>
54
55 static void (*cpu_initclocks_hook)(int, int);
56
57 void
timer_config(void (* initfunc)(int,int))58 timer_config(void (*initfunc)(int, int))
59 {
60
61 if (cpu_initclocks_hook)
62 panic("clock_config: too many timers configured");
63
64 cpu_initclocks_hook = initfunc;
65 }
66
67 /*
68 * Set up the real-time and statistics clocks. Leave stathz 0 only
69 * if no alternative timer is available.
70 *
71 * The frequencies of these clocks must be an even number of microseconds.
72 */
73 void
cpu_initclocks(void)74 cpu_initclocks(void)
75 {
76
77 if (cpu_initclocks_hook == NULL)
78 panic("no timer device configured");
79
80 if (1000000 % hz) {
81 printf("cannot get %d Hz clock; using 100 Hz\n", hz);
82 hz = 100;
83 tick = 1000000 / hz;
84 }
85
86 /* Call the machine-specific initclocks hook. */
87
88 (*cpu_initclocks_hook)(0, 0);
89 }
90
91 /*
92 * This does not need to do anything, as we have only one timer and
93 * profhz == stathz == hz.
94 */
95 void
setstatclockrate(int newhz)96 setstatclockrate(int newhz)
97 {
98
99 /* nothing to do */
100 }
101