1 /* $NetBSD: clock.c,v 1.6 2008/01/12 09:54:33 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 /*
44 * Copyright (c) 1994 Gordon W. Ross
45 * Copyright (c) 1993 Adam Glass
46 *
47 * This software was developed by the Computer Systems Engineering group
48 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
49 * contributed to Berkeley.
50 *
51 * All advertising materials mentioning features or use of this software
52 * must display the following acknowledgement:
53 * This product includes software developed by the University of
54 * California, Lawrence Berkeley Laboratory.
55 *
56 * Redistribution and use in source and binary forms, with or without
57 * modification, are permitted provided that the following conditions
58 * are met:
59 * 1. Redistributions of source code must retain the above copyright
60 * notice, this list of conditions and the following disclaimer.
61 * 2. Redistributions in binary form must reproduce the above copyright
62 * notice, this list of conditions and the following disclaimer in the
63 * documentation and/or other materials provided with the distribution.
64 * 3. All advertising materials mentioning features or use of this software
65 * must display the following acknowledgement:
66 * This product includes software developed by the University of
67 * California, Berkeley and its contributors.
68 * 4. Neither the name of the University nor the names of its contributors
69 * may be used to endorse or promote products derived from this software
70 * without specific prior written permission.
71 *
72 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
73 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
74 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
75 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
76 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
77 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
78 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
79 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
80 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
81 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
82 * SUCH DAMAGE.
83 *
84 * @(#)clock.c 8.1 (Berkeley) 6/11/93
85 */
86
87 /*
88 * Clock driver.
89 */
90
91 #include "sboot.h"
92 #include "clockreg.h"
93
94 #include <machine/prom.h>
95 #include "libsa.h"
96
97 static struct clockreg *clockreg = (struct clockreg *)CLOCK_ADDR;
98
99 /*
100 * Set up the system's time, given a `reasonable' time value.
101 */
time(void)102 u_long time(void)
103 {
104 struct clockreg *cl = clockreg;
105 int sec, min, hour, day, mon, year;
106
107 cl->cl_csr |= CLK_READ; /* enable read (stop time) */
108 sec = cl->cl_sec;
109 min = cl->cl_min;
110 hour = cl->cl_hour;
111 day = cl->cl_mday;
112 mon = cl->cl_month;
113 year = cl->cl_year;
114 cl->cl_csr &= ~CLK_READ; /* time wears on */
115 return chiptotime(sec, min, hour, day, mon, year);
116 }
117