diff options
Diffstat (limited to 'sys/i386/isa/clock.c')
| -rw-r--r-- | sys/i386/isa/clock.c | 28 |
1 files changed, 22 insertions, 6 deletions
diff --git a/sys/i386/isa/clock.c b/sys/i386/isa/clock.c index 98ef6f78..8e812a1 100644 --- a/sys/i386/isa/clock.c +++ b/sys/i386/isa/clock.c @@ -130,6 +130,8 @@ static void setup_8254_mixed_mode(void); int adjkerntz; /* local offset from GMT in seconds */ int clkintr_pending; int disable_rtc_set; /* disable resettodr() if != 0 */ +int pscnt = 1; +int psdiv = 1; int statclock_disable; #ifndef TIMER_FREQ #define TIMER_FREQ 1193182 @@ -380,7 +382,13 @@ static void rtcintr(struct clockframe frame) { while (rtcin(RTC_INTR) & RTCIR_PERIOD) { - statclock(&frame); + if (profprocs != 0) { + if (--pscnt == 0) + pscnt = psdiv; + profclock(&frame); + } + if (pscnt == psdiv) + statclock(&frame); #ifdef SMP forward_statclock(); #endif @@ -1169,13 +1177,21 @@ setup_8254_mixed_mode() #endif void -setstatclockrate(int newhz) +cpu_startprofclock(void) { - if (newhz == RTC_PROFRATE) - rtc_statusa = RTCSA_DIVIDER | RTCSA_PROF; - else - rtc_statusa = RTCSA_DIVIDER | RTCSA_NOPROF; + + rtc_statusa = RTCSA_DIVIDER | RTCSA_PROF; + writertc(RTC_STATUSA, rtc_statusa); + psdiv = pscnt = psratio; +} + +void +cpu_stopprofclock(void) +{ + + rtc_statusa = RTCSA_DIVIDER | RTCSA_NOPROF; writertc(RTC_STATUSA, rtc_statusa); + psdiv = pscnt = 1; } static int |
