Commit 16c186ac authored by David S. Miller's avatar David S. Miller

Merge davem@nuts.davemloft.net:/disk1/BK/sparc-2.6

into kernel.bkbits.net:/home/davem/sparc-2.6
parents 0f180260 60c527ad
......@@ -12,6 +12,10 @@ config MMU
bool
default y
config TIME_INTERPOLATION
bool
default y
source "init/Kconfig"
menu "General machine setup"
......
This diff is collapsed.
......@@ -431,7 +431,6 @@ static struct sparc64_tick_ops hbtick_operations = {
unsigned long timer_tick_offset;
unsigned long timer_tick_compare;
static unsigned long timer_ticks_per_usec_quotient;
static unsigned long timer_ticks_per_nsec_quotient;
#define TICK_SIZE (tick_nsec / 1000)
......@@ -1025,18 +1024,22 @@ static int sparc64_cpufreq_notifier(struct notifier_block *nb, unsigned long val
static struct notifier_block sparc64_cpufreq_notifier_block = {
.notifier_call = sparc64_cpufreq_notifier
};
#endif
#endif /* CONFIG_CPU_FREQ */
static struct time_interpolator sparc64_cpu_interpolator = {
.source = TIME_SOURCE_CPU,
.shift = 16,
};
/* The quotient formula is taken from the IA64 port. */
#define SPARC64_USEC_PER_CYC_SHIFT 30UL
#define SPARC64_NSEC_PER_CYC_SHIFT 30UL
void __init time_init(void)
{
unsigned long clock = sparc64_init_timers(timer_interrupt);
timer_ticks_per_usec_quotient =
(((1000000UL << SPARC64_USEC_PER_CYC_SHIFT) +
(clock / 2)) / clock);
sparc64_cpu_interpolator.frequency = clock;
register_time_interpolator(&sparc64_cpu_interpolator);
timer_ticks_per_nsec_quotient =
(((NSEC_PER_SEC << SPARC64_NSEC_PER_CYC_SHIFT) +
......@@ -1048,17 +1051,6 @@ void __init time_init(void)
#endif
}
static __inline__ unsigned long do_gettimeoffset(void)
{
unsigned long ticks = tick_ops->get_tick();
ticks += timer_tick_offset;
ticks -= timer_tick_compare;
return (ticks * timer_ticks_per_usec_quotient)
>> SPARC64_USEC_PER_CYC_SHIFT;
}
unsigned long long sched_clock(void)
{
unsigned long ticks = tick_ops->get_tick();
......@@ -1067,100 +1059,6 @@ unsigned long long sched_clock(void)
>> SPARC64_NSEC_PER_CYC_SHIFT;
}
int do_settimeofday(struct timespec *tv)
{
time_t wtm_sec, sec = tv->tv_sec;
long wtm_nsec, nsec = tv->tv_nsec;
if ((unsigned long)tv->tv_nsec >= NSEC_PER_SEC)
return -EINVAL;
if (this_is_starfire)
return 0;
write_seqlock_irq(&xtime_lock);
/*
* This is revolting. We need to set "xtime" correctly. However, the
* value in this location is the value at the most recent update of
* wall time. Discover what correction gettimeofday() would have
* made, and then undo it!
*/
nsec -= do_gettimeoffset() * 1000;
nsec -= (jiffies - wall_jiffies) * (NSEC_PER_SEC / HZ);
wtm_sec = wall_to_monotonic.tv_sec + (xtime.tv_sec - sec);
wtm_nsec = wall_to_monotonic.tv_nsec + (xtime.tv_nsec - nsec);
set_normalized_timespec(&xtime, sec, nsec);
set_normalized_timespec(&wall_to_monotonic, wtm_sec, wtm_nsec);
time_adjust = 0; /* stop active adjtime() */
time_status |= STA_UNSYNC;
time_maxerror = NTP_PHASE_LIMIT;
time_esterror = NTP_PHASE_LIMIT;
write_sequnlock_irq(&xtime_lock);
clock_was_set();
return 0;
}
EXPORT_SYMBOL(do_settimeofday);
/* Ok, my cute asm atomicity trick doesn't work anymore.
* There are just too many variables that need to be protected
* now (both members of xtime, wall_jiffies, et al.)
*/
void do_gettimeofday(struct timeval *tv)
{
unsigned long seq;
unsigned long usec, sec;
unsigned long max_ntp_tick = tick_usec - tickadj;
do {
unsigned long lost;
seq = read_seqbegin(&xtime_lock);
usec = do_gettimeoffset();
lost = jiffies - wall_jiffies;
/*
* If time_adjust is negative then NTP is slowing the clock
* so make sure not to go into next possible interval.
* Better to lose some accuracy than have time go backwards..
*/
if (unlikely(time_adjust < 0)) {
usec = min(usec, max_ntp_tick);
if (lost)
usec += lost * max_ntp_tick;
}
else if (unlikely(lost))
usec += lost * tick_usec;
sec = xtime.tv_sec;
/* Believe it or not, this divide shows up on
* kernel profiles. The problem is that it is
* both 64-bit and signed. Happily, 32-bits
* of precision is all we really need and in
* doing so gcc ends up emitting a cheap multiply.
*
* XXX Why is tv_nsec 'long' and 'signed' in
* XXX the first place, can it even be negative?
*/
usec += ((unsigned int) xtime.tv_nsec / 1000U);
} while (read_seqretry(&xtime_lock, seq));
while (usec >= 1000000) {
usec -= 1000000;
sec++;
}
tv->tv_sec = sec;
tv->tv_usec = usec;
}
EXPORT_SYMBOL(do_gettimeofday);
static int set_rtc_mmss(unsigned long nowtime)
{
int real_seconds, real_minutes, chip_minutes;
......
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