Deleted Added
sdiff udiff text old ( 82555 ) new ( 82971 )
full compact
atrtc.c (82555) atrtc.c (82971)
1/*-
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * William Jolitz and Don Ahn.
7 *
8 * Redistribution and use in source and binary forms, with or without

--- 20 unchanged lines hidden (view full) ---

29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * from: @(#)clock.c 7.2 (Berkeley) 5/12/91
1/*-
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * William Jolitz and Don Ahn.
7 *
8 * Redistribution and use in source and binary forms, with or without

--- 20 unchanged lines hidden (view full) ---

29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * from: @(#)clock.c 7.2 (Berkeley) 5/12/91
37 * $FreeBSD: head/sys/isa/atrtc.c 82555 2001-08-30 09:17:03Z msmith $
37 * $FreeBSD: head/sys/isa/atrtc.c 82971 2001-09-04 16:02:06Z iwasaki $
38 */
39
40/*
41 * Routines to handle clock hardware.
42 */
43
44/*
45 * inittodr, settodr and support routines written

--- 654 unchanged lines hidden (view full) ---

700/*
701 * i8254_restore is called from apm_default_resume() to reload
702 * the countdown register.
703 * this should not be necessary but there are broken laptops that
704 * do not restore the countdown register on resume.
705 * when it happnes, it messes up the hardclock interval and system clock,
706 * which leads to the infamous "calcru: negative time" problem.
707 */
38 */
39
40/*
41 * Routines to handle clock hardware.
42 */
43
44/*
45 * inittodr, settodr and support routines written

--- 654 unchanged lines hidden (view full) ---

700/*
701 * i8254_restore is called from apm_default_resume() to reload
702 * the countdown register.
703 * this should not be necessary but there are broken laptops that
704 * do not restore the countdown register on resume.
705 * when it happnes, it messes up the hardclock interval and system clock,
706 * which leads to the infamous "calcru: negative time" problem.
707 */
708void
708static void
709i8254_restore(void)
710{
711
712 mtx_lock_spin(&clock_lock);
713 outb(TIMER_MODE, TIMER_SEL0 | TIMER_RATEGEN | TIMER_16BIT);
714 outb(TIMER_CNTR0, timer0_max_count & 0xff);
715 outb(TIMER_CNTR0, timer0_max_count >> 8);
716 mtx_unlock_spin(&clock_lock);
717}
718
709i8254_restore(void)
710{
711
712 mtx_lock_spin(&clock_lock);
713 outb(TIMER_MODE, TIMER_SEL0 | TIMER_RATEGEN | TIMER_16BIT);
714 outb(TIMER_CNTR0, timer0_max_count & 0xff);
715 outb(TIMER_CNTR0, timer0_max_count >> 8);
716 mtx_unlock_spin(&clock_lock);
717}
718
719static void
720rtc_restore(void)
721{
722
723 /* Reenable RTC updates and interrupts. */
724 /* XXX locking is needed for RTC access? */
725 writertc(RTC_STATUSB, RTCSB_HALT | RTCSB_24HR);
726 writertc(RTC_STATUSB, rtc_statusb);
727}
728
719/*
729/*
730 * Restore all the timers atomically.
731 */
732void
733timer_restore(void)
734{
735
736 i8254_restore(); /* restore timer_freq and hz */
737 rtc_restore(); /* reenable RTC interrupts */
738}
739
740/*
720 * Initialize 8254 timer 0 early so that it can be used in DELAY().
721 * XXX initialization of other timers is unintentionally left blank.
722 */
723void
724startrtclock()
725{
726 u_int delta, freq;
727

--- 555 unchanged lines hidden --- 		741 * Initialize 8254 timer 0 early so that it can be used in DELAY().
742 * XXX initialization of other timers is unintentionally left blank.
743 */
744void
745startrtclock()
746{
747 u_int delta, freq;
748

--- 555 unchanged lines hidden ---