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851194715d
CLOCK_GETTIME() with the lock. Now all time-related accesses to the CMOS for RTC should be under the lock. This is needed to allow upcoming EFI Runtime Services support to provide required execution environment for the firmware calls. Sponsored by: The FreeBSD Foundation MFC after: 1 week
99 lines
3.4 KiB
C
99 lines
3.4 KiB
C
/*-
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* Copyright (c) 1996 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Gordon W. Ross
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* $NetBSD: clock_subr.h,v 1.7 2000/10/03 13:41:07 tsutsui Exp $
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*
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*
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* This file is the central clearing-house for calendrical issues.
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*
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* In general the kernel does not know about minutes, hours, days, timezones,
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* daylight savings time, leap-years and such. All that is theoretically a
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* matter for userland only.
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*
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* Parts of kernel code does however care: badly designed filesystems store
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* timestamps in local time and RTC chips sometimes track time in a local
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* timezone instead of UTC and so on.
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*
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* All that code should go here for service.
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*
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* $FreeBSD$
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*/
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#ifndef _SYS_CLOCK_H_
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#define _SYS_CLOCK_H_
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#ifdef _KERNEL /* No user serviceable parts */
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/*
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* Timezone info from settimeofday(2), usually not used
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*/
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extern int tz_minuteswest;
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extern int tz_dsttime;
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extern struct mtx resettodr_lock;
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int utc_offset(void);
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/*
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* Structure to hold the values typically reported by time-of-day clocks.
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* This can be passed to the generic conversion functions to be converted
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* to a struct timespec.
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*/
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struct clocktime {
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int year; /* year (4 digit year) */
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int mon; /* month (1 - 12) */
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int day; /* day (1 - 31) */
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int hour; /* hour (0 - 23) */
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int min; /* minute (0 - 59) */
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int sec; /* second (0 - 59) */
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int dow; /* day of week (0 - 6; 0 = Sunday) */
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long nsec; /* nano seconds */
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};
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int clock_ct_to_ts(struct clocktime *, struct timespec *);
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void clock_ts_to_ct(struct timespec *, struct clocktime *);
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void clock_register(device_t, long);
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/*
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* BCD to decimal and decimal to BCD.
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*/
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#define FROMBCD(x) bcd2bin(x)
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#define TOBCD(x) bin2bcd(x)
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/* Some handy constants. */
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#define SECDAY (24 * 60 * 60)
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#define SECYR (SECDAY * 365)
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/* Traditional POSIX base year */
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#define POSIX_BASE_YEAR 1970
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void timespec2fattime(struct timespec *tsp, int utc, u_int16_t *ddp, u_int16_t *dtp, u_int8_t *dhp);
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void fattime2timespec(unsigned dd, unsigned dt, unsigned dh, int utc, struct timespec *tsp);
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#endif /* _KERNEL */
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#endif /* !_SYS_CLOCK_H_ */
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