FreeBSD/Linux Kernel Cross Reference
sys/sys/clock.h
1 /*-
2 * Copyright (c) 1996 The NetBSD Foundation, Inc.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to The NetBSD Foundation
6 * by Gordon W. Ross
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27 * POSSIBILITY OF SUCH DAMAGE.
28 *
29 * $NetBSD: clock_subr.h,v 1.7 2000/10/03 13:41:07 tsutsui Exp $
30 *
31 * $FreeBSD$
32 */
33
34 #ifndef _SYS_CLOCK_H_
35 #define _SYS_CLOCK_H_
36
37 #ifdef _KERNEL /* No user serviceable parts */
38
39 /*
40 * Kernel to clock driver interface.
41 */
42 void inittodr(time_t base);
43 void resettodr(void);
44 void startrtclock(void);
45
46 extern int disable_rtc_set;
47
48 /*
49 * Timezone info from settimeofday(2), usually not used
50 */
51 extern int tz_minuteswest;
52 extern int tz_dsttime;
53
54 int utc_offset(void);
55
56 /*
57 * Structure to hold the values typically reported by time-of-day clocks.
58 * This can be passed to the generic conversion functions to be converted
59 * to a struct timespec.
60 */
61 struct clocktime {
62 int year; /* year (4 digit year) */
63 int mon; /* month (1 - 12) */
64 int day; /* day (1 - 31) */
65 int hour; /* hour (0 - 23) */
66 int min; /* minute (0 - 59) */
67 int sec; /* second (0 - 59) */
68 int dow; /* day of week (0 - 6; 0 = Sunday) */
69 long nsec; /* nano seconds */
70 };
71
72 int clock_ct_to_ts(struct clocktime *, struct timespec *);
73 void clock_ts_to_ct(struct timespec *, struct clocktime *);
74 void clock_register(device_t, long);
75
76 /*
77 * BCD to decimal and decimal to BCD.
78 */
79 #define FROMBCD(x) bcd2bin(x)
80 #define TOBCD(x) bin2bcd(x)
81
82 /* Some handy constants. */
83 #define SECDAY (24 * 60 * 60)
84 #define SECYR (SECDAY * 365)
85
86 /* Traditional POSIX base year */
87 #define POSIX_BASE_YEAR 1970
88
89 void timespec2fattime(struct timespec *tsp, int utc, u_int16_t *ddp, u_int16_t *dtp, u_int8_t *dhp);
90 void fattime2timespec(unsigned dd, unsigned dt, unsigned dh, int utc, struct timespec *tsp);
91
92 #endif /* _KERNEL */
93
94 #endif /* !_SYS_CLOCK_H_ */
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