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authorThomas Moestl <tmm@FreeBSD.org>2002-04-04 23:39:10 +0000
committerThomas Moestl <tmm@FreeBSD.org>2002-04-04 23:39:10 +0000
commitd7f7792edf3d6c99fe5bc5db110533495f5c0b46 (patch)
tree734bd8b6a6a2ea0ebcc98eaa281f876fb67ee42d /sys/sys/clock.h
parent2c7178b5fc380bb72659399ed7391a2c2c6ba43a (diff)
downloadsrc-d7f7792edf3d6c99fe5bc5db110533495f5c0b46.tar.gz
src-d7f7792edf3d6c99fe5bc5db110533495f5c0b46.zip
Add a generic implementation of inittodr() and resettodr(), as well as
a set of helper routines to deal with real-time clocks. The generic functions access the clock diver using a kobj interface. This is intended to reduce code reduplication and make it easy to support more than one clock model on a single architecture. This code is currently only used on sparc64, but it is planned to convert the code of the other architectures to it later.
Notes
Notes: svn path=/head/; revision=93835
Diffstat (limited to 'sys/sys/clock.h')
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diff --git a/sys/sys/clock.h b/sys/sys/clock.h
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+/*-
+ * Copyright (c) 1996 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Gordon W. Ross
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the NetBSD
+ * Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $NetBSD: clock_subr.h,v 1.7 2000/10/03 13:41:07 tsutsui Exp $
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _SYS_CLOCK_H_
+#define _SYS_CLOCK_H_
+
+/*
+ * Structure to hold the values typically reported by time-of-day clocks.
+ * This can be passed to the generic conversion functions to be converted
+ * to a struct timespec.
+ */
+struct clocktime {
+ int year; /* year - 1900 */
+ int mon; /* month (1 - 12) */
+ int day; /* day (1 - 31) */
+ int hour; /* hour (0 - 23) */
+ int min; /* minute (0 - 59) */
+ int sec; /* second (0 - 59) */
+ int dow; /* day of week (0 - 6; 0 = Sunday) */
+ long nsec; /* nano seconds */
+};
+
+int clock_ct_to_ts(struct clocktime *, struct timespec *);
+void clock_ts_to_ct(struct timespec *, struct clocktime *);
+void clock_register(device_t, long);
+
+/*
+ * BCD to decimal and decimal to BCD.
+ */
+#define FROMBCD(x) (((x) >> 4) * 10 + ((x) & 0xf))
+#define TOBCD(x) (((x) / 10 * 16) + ((x) % 10))
+
+/* Some handy constants. */
+#define SECDAY (24 * 60 * 60)
+#define SECYR (SECDAY * 365)
+
+/* Traditional POSIX base year */
+#define POSIX_BASE_YEAR 1970
+
+#endif /* !_SYS_CLOCK_H_ */