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Sync with sys/i386/isa/clock.c revision 1.146.

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This commit is contained in:
Yoshihiro Takahashi 1999-11-03 08:36:17 +00:00
parent 09b1cdbdb5
commit 064fc58a7c
3 changed files with 66 additions and 0 deletions
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22
sys/pc98/cbus/clock.c
View File

@ -872,6 +872,28 @@ set_timer_freq(u_int freq, int intr_freq)
write_eflags(ef);
}
/*
* i8254_restore is called from apm_default_resume() to reload
* the countdown register.
* this should not be necessary but there are broken laptops that
* do not restore the countdown register on resume.
* when it happnes, it messes up the hardclock interval and system clock,
* which leads to the infamous "calcru: negative time" problem.
*/
void
i8254_restore(void)
{
u_long ef;
ef = read_eflags();
disable_intr();
outb(TIMER_MODE, TIMER_SEL0 | TIMER_RATEGEN | TIMER_16BIT);
outb(TIMER_CNTR0, timer0_max_count & 0xff);
outb(TIMER_CNTR0, timer0_max_count >> 8);
CLOCK_UNLOCK();
write_eflags(ef);
}
/*
* Initialize 8254 timer 0 early so that it can be used in DELAY().
* XXX initialization of other timers is unintentionally left blank.

22
sys/pc98/cbus/pcrtc.c
View File

@ -872,6 +872,28 @@ set_timer_freq(u_int freq, int intr_freq)
write_eflags(ef);
}
/*
* i8254_restore is called from apm_default_resume() to reload
* the countdown register.
* this should not be necessary but there are broken laptops that
* do not restore the countdown register on resume.
* when it happnes, it messes up the hardclock interval and system clock,
* which leads to the infamous "calcru: negative time" problem.
*/
void
i8254_restore(void)
{
u_long ef;
ef = read_eflags();
disable_intr();
outb(TIMER_MODE, TIMER_SEL0 | TIMER_RATEGEN | TIMER_16BIT);
outb(TIMER_CNTR0, timer0_max_count & 0xff);
outb(TIMER_CNTR0, timer0_max_count >> 8);
CLOCK_UNLOCK();
write_eflags(ef);
}
/*
* Initialize 8254 timer 0 early so that it can be used in DELAY().
* XXX initialization of other timers is unintentionally left blank.

22
sys/pc98/pc98/clock.c
View File

@ -872,6 +872,28 @@ set_timer_freq(u_int freq, int intr_freq)
write_eflags(ef);
}
/*
* i8254_restore is called from apm_default_resume() to reload
* the countdown register.
* this should not be necessary but there are broken laptops that
* do not restore the countdown register on resume.
* when it happnes, it messes up the hardclock interval and system clock,
* which leads to the infamous "calcru: negative time" problem.
*/
void
i8254_restore(void)
{
u_long ef;
ef = read_eflags();
disable_intr();
outb(TIMER_MODE, TIMER_SEL0 | TIMER_RATEGEN | TIMER_16BIT);
outb(TIMER_CNTR0, timer0_max_count & 0xff);
outb(TIMER_CNTR0, timer0_max_count >> 8);
CLOCK_UNLOCK();
write_eflags(ef);
}
/*
* Initialize 8254 timer 0 early so that it can be used in DELAY().
* XXX initialization of other timers is unintentionally left blank.