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 * 32 * This file is the central clearing-house for calendrical issues. 33 * 34 * In general the kernel does not know about minutes, hours, days, timezones, 35 * daylight savings time, leap-years and such. All that is theoretically a 36 * matter for userland only. 37 * 38 * Parts of kernel code does however care: badly designed filesystems store 39 * timestamps in local time and RTC chips sometimes track time in a local 40 * timezone instead of UTC and so on. 41 * 42 * All that code should go here for service. 43 * 44 * $FreeBSD$ 45 */ 46 47 #ifndef _COMPAT_FREEBSD_SYS_CLOCK_H_ 48 #define _COMPAT_FREEBSD_SYS_CLOCK_H_ 49 50 #include_next <sys/clock.h> 51 52 #ifdef _KERNEL /* No user serviceable parts */ 53 54 #ifdef __FreeBSD__ 55 /* 56 * Timezone info from settimeofday(2), usually not used 57 */ 58 extern int tz_minuteswest; 59 extern int tz_dsttime; 60 extern struct mtx resettodr_lock; 61 62 int utc_offset(void); 63 #endif /* __FreeBSD__ */ 64 65 /* 66 * Structure to hold the values typically reported by time-of-day clocks. 67 * This can be passed to the generic conversion functions to be converted 68 * to a struct timespec. 69 */ 70 struct clocktime { 71 int year; /* year (4 digit year) */ 72 int mon; /* month (1 - 12) */ 73 int day; /* day (1 - 31) */ 74 int hour; /* hour (0 - 23) */ 75 int min; /* minute (0 - 59) */ 76 int sec; /* second (0 - 59) */ 77 int dow; /* day of week (0 - 6; 0 = Sunday) */ 78 long nsec; /* nano seconds */ 79 }; 80 81 int clock_ct_to_ts(struct clocktime *, struct timespec *); 82 void clock_ts_to_ct(struct timespec *, struct clocktime *); 83 #ifdef __FreeBSD__ 84 void clock_register(device_t, long); 85 #endif 86 87 #ifndef __FreeBSD__ 88 extern u_char const bin2bcd_data[]; 89 #define bin2bcd(x) (bin2bcd_data[bin]) 90 #endif 91 92 /* 93 * BCD to decimal and decimal to BCD. 94 */ 95 #define FROMBCD(x) bcd2bin(x) 96 #define TOBCD(x) bin2bcd(x) 97 98 /* Some handy constants. */ 99 #define SECDAY (24 * 60 * 60) 100 #define SECYR (SECDAY * 365) 101 102 /* Traditional POSIX base year */ 103 #define POSIX_BASE_YEAR 1970 104 105 void timespec2fattime(struct timespec *tsp, int utc, u_int16_t *ddp, u_int16_t *dtp, u_int8_t *dhp); 106 void fattime2timespec(unsigned dd, unsigned dt, unsigned dh, int utc, struct timespec *tsp); 107 108 #endif /* _KERNEL */ 109 110 #endif /* _COMPAT_FREEBSD_SYS_CLOCK_H_ */ 111