1 /* $NetBSD: timer.c,v 1.12 2023/08/30 17:10:17 tsutsui Exp $ */
2 /* NetBSD: clock.c,v 1.31 2001/05/27 13:53:24 sommerfeld Exp */
3
4 /*
5 * Copyright (c) 1988 University of Utah.
6 * Copyright (c) 1992, 1993
7 * The Regents of the University of California. All rights reserved.
8 *
9 * This code is derived from software contributed to Berkeley by
10 * the Systems Programming Group of the University of Utah Computer
11 * Science Department and Ralph Campbell.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 * from: Utah Hdr: clock.c 1.18 91/01/21
38 *
39 * @(#)clock.c 8.1 (Berkeley) 6/10/93
40 */
41
42 #include <sys/cdefs.h>
43 __KERNEL_RCSID(0, "$NetBSD: timer.c,v 1.12 2023/08/30 17:10:17 tsutsui Exp $");
44
45 #include <sys/param.h>
46 #include <sys/kernel.h>
47 #include <sys/systm.h>
48
49 #include <mips/locore.h>
50 #include <mips/mips3_clock.h>
51
52 #include <arc/arc/timervar.h>
53
54 device_t timerdev;
55 const struct timerfns *timerfns;
56 int timerinitted;
57 uint32_t last_cp0_count;
58
59 void
timerattach(device_t dev,const struct timerfns * fns)60 timerattach(device_t dev, const struct timerfns *fns)
61 {
62
63 /*
64 * Just bookkeeping.
65 */
66
67 if (timerfns != NULL)
68 panic("timerattach: multiple timers");
69 timerdev = dev;
70 timerfns = fns;
71 }
72
73 /*
74 * Machine-dependent clock routines.
75 */
76
77 /*
78 * Start the real-time and statistics clocks. Leave stathz 0 since there
79 * are no other timers available.
80 */
81 void
cpu_initclocks(void)82 cpu_initclocks(void)
83 {
84
85 if (timerfns == NULL)
86 panic("cpu_initclocks: no timer attached");
87
88 /*
89 * Get the clock started.
90 */
91 (*timerfns->tf_init)(timerdev);
92
93 /* init timecounter */
94 mips3_init_tc();
95 }
96
97 /*
98 * This does not need to do anything, as we don't use a timer for statclock
99 * and profhz == stathz == hz.
100 */
101 void
setstatclockrate(int newhz)102 setstatclockrate(int newhz)
103 {
104
105 /* nothing to do */
106 }
107