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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2010 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1990, 1991 UNIX System Laboratories, Inc. */
/* Copyright (c) 1984, 1986, 1987, 1988, 1989, 1990 AT&T */
/* All Rights Reserved */
#include <sys/param.h>
#include <sys/time.h>
#include <sys/systm.h>
#include <sys/archsystm.h>
#include <sys/lockstat.h>
#include <sys/clock.h>
#include <sys/debug.h>
#include <sys/smp_impldefs.h>
#include <sys/rtc.h>
/*
* This file contains all generic part of clock and timer handling.
* Specifics are now in separate files and may be overridden by TOD
* modules.
*/
char *tod_module_name; /* Settable in /etc/system */
extern void tod_set_prev(timestruc_t);
/*
* Write the specified time into the clock chip.
* Must be called with tod_lock held.
*/
void
tod_set(timestruc_t ts)
{
ASSERT(MUTEX_HELD(&tod_lock));
tod_set_prev(ts); /* for tod_validate() */
TODOP_SET(tod_ops, ts);
tod_status_set(TOD_SET_DONE); /* TOD was modified */
}
/*
* Read the current time from the clock chip and convert to UNIX form.
* Assumes that the year in the clock chip is valid.
* Must be called with tod_lock held.
*/
timestruc_t
tod_get(void)
{
timestruc_t ts;
ASSERT(MUTEX_HELD(&tod_lock));
ts = TODOP_GET(tod_ops);
ts.tv_sec = tod_validate(ts.tv_sec);
return (ts);
}
/*
* The following wrappers have been added so that locking
* can be exported to platform-independent clock routines
* (ie adjtime(), clock_setttime()), via a functional interface.
*/
int
hr_clock_lock(void)
{
ushort_t s;
CLOCK_LOCK(&s);
return (s);
}
void
hr_clock_unlock(int s)
{
CLOCK_UNLOCK(s);
}
/*
* Support routines for horrid GMT lag handling
*/
static time_t gmt_lag; /* offset in seconds of gmt to local time */
void
sgmtl(time_t arg)
{
gmt_lag = arg;
}
time_t
ggmtl(void)
{
return (gmt_lag);
}
/* rtcsync() - set 'time', assuming RTC and GMT lag are correct */
void
rtcsync(void)
{
timestruc_t ts;
mutex_enter(&tod_lock);
ts = TODOP_GET(tod_ops);
set_hrestime(&ts);
mutex_exit(&tod_lock);
}
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