diff options
| author | peter <peter@FreeBSD.org> | 2003-09-30 06:38:11 +0000 |
|---|---|---|
| committer | peter <peter@FreeBSD.org> | 2003-09-30 06:38:11 +0000 |
| commit | 714b95391d6cb3683109685a51ee1c29b258f487 (patch) | |
| tree | 2247e153c4ddafc81f641768c2e62975b389d05e /sys/amd64/isa | |
| parent | 701b4bd0ef610c8cd2cd6dc3c8abcbdd8dff518d (diff) | |
| download | FreeBSD-src-714b95391d6cb3683109685a51ee1c29b258f487.zip FreeBSD-src-714b95391d6cb3683109685a51ee1c29b258f487.tar.gz | |
MFi386: BURN_BRIDGES around timer0 functions
Diffstat (limited to 'sys/amd64/isa')
| -rw-r--r-- | sys/amd64/isa/clock.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/sys/amd64/isa/clock.c b/sys/amd64/isa/clock.c index 527b285..4af282e 100644 --- a/sys/amd64/isa/clock.c +++ b/sys/amd64/isa/clock.c @@ -92,6 +92,7 @@ __FBSDID("$FreeBSD$"); #define TIMER_DIV(x) ((timer_freq + (x) / 2) / (x)) +#ifndef BURN_BRIDGES /* * Time in timer cycles that it takes for microtime() to disable interrupts * and latch the count. microtime() currently uses "cli; outb ..." so it @@ -107,6 +108,7 @@ __FBSDID("$FreeBSD$"); * before the next timer interrupt. */ #define TIMER0_MAX_FREQ 20000 +#endif int adjkerntz; /* local offset from GMT in seconds */ int clkintr_pending; @@ -128,6 +130,7 @@ static u_int hardclock_max_count; static u_int32_t i8254_lastcount; static u_int32_t i8254_offset; static int i8254_ticked; +#ifndef BURN_BRIDGES /* * XXX new_function and timer_func should not handle clockframes, but * timer_func currently needs to hold hardclock to handle the @@ -136,9 +139,11 @@ static int i8254_ticked; */ static void (*new_function)(struct clockframe *frame); static u_int new_rate; +static u_int timer0_prescaler_count; +static u_char timer0_state; +#endif static u_char rtc_statusa = RTCSA_DIVIDER | RTCSA_NOPROF; static u_char rtc_statusb = RTCSB_24HR | RTCSB_PINTR; -static u_int timer0_prescaler_count; /* Values for timerX_state: */ #define RELEASED 0 @@ -146,7 +151,6 @@ static u_int timer0_prescaler_count; #define ACQUIRED 2 #define ACQUIRE_PENDING 3 -static u_char timer0_state; static u_char timer2_state; static void (*timer_func)(struct clockframe *frame) = hardclock; @@ -177,6 +181,7 @@ clkintr(struct clockframe frame) mtx_unlock_spin(&clock_lock); } timer_func(&frame); +#ifndef BURN_BRIDGES switch (timer0_state) { case RELEASED: @@ -222,8 +227,10 @@ clkintr(struct clockframe frame) } break; } +#endif } +#ifndef BURN_BRIDGES /* * The acquire and release functions must be called at ipl >= splclock(). */ @@ -259,6 +266,7 @@ acquire_timer0(int rate, void (*function)(struct clockframe *frame)) old_rate = new_rate = rate; return (0); } +#endif int acquire_timer2(int mode) @@ -280,6 +288,7 @@ acquire_timer2(int mode) return (0); } +#ifndef BURN_BRIDGES int release_timer0() { @@ -299,6 +308,7 @@ release_timer0() } return (0); } +#endif int release_timer2() @@ -931,8 +941,10 @@ sysctl_machdep_i8254_freq(SYSCTL_HANDLER_ARGS) freq = timer_freq; error = sysctl_handle_int(oidp, &freq, sizeof(freq), req); if (error == 0 && req->newptr != NULL) { +#ifndef BURN_BRIDGES if (timer0_state != RELEASED) return (EBUSY); /* too much trouble to handle */ +#endif set_timer_freq(freq, hz); i8254_timecounter.tc_frequency = freq; } |
