/*
* sched_clock()
*/
unsigned long long sched_clock(void)
{
cycle_t cyc = ixp4xx_get_cycles(NULL);
struct clocksource *cs = &clocksource_ixp4xx;
return clocksource_cyc2ns(cyc, cs->mult, cs->shift);
}
/*
* sched_clock()
*/
unsigned long long sched_clock(void)
{
cycle_t cyc = cycle_read_timerE(NULL);
struct clocksource *cs = &clocksource_timer_e;
return clocksource_cyc2ns(cyc, cs->mult, cs->shift);
}
unsigned long long notrace sched_clock(void)
{
return clocksource_cyc2ns(clocksource_u300_1mhz.read(
&clocksource_u300_1mhz),
clocksource_u300_1mhz.mult,
clocksource_u300_1mhz.shift);
}
/**
* read_persistent_clock - Return time from a persistent clock.
*
* Reads the time from a source which isn't disabled during PM, the
* 32k sync timer. Convert the cycles elapsed since last read into
* nsecs and adds to a monotonically increasing timespec.
*/
void read_persistent_clock(struct timespec *ts)
{
struct omap_32k_sync_device *omap = thecs;
unsigned long long nsecs;
cycles_t delta;
struct timespec *tsp;
if (!omap) {
ts->tv_sec = 0;
ts->tv_nsec = 0;
return;
}
tsp = &omap->persistent_ts;
omap->last_cycles = omap->cycles;
omap->cycles = omap->cs.read(&omap->cs);
delta = omap->cycles - omap->last_cycles;
nsecs = clocksource_cyc2ns(delta,
omap->cs.mult, omap->cs.shift);
timespec_add_ns(tsp, nsecs);
*ts = *tsp;
}
/*
* Override the global weak sched_clock symbol with this
* local implementation which uses the clocksource to get some
* better resolution when scheduling the kernel. We accept that
* this wraps around for now, since it is just a relative time
* stamp. (Inspired by OMAP implementation.)
*/
unsigned long long notrace sched_clock(void)
{
return clocksource_cyc2ns(nmdk_clksrc.read(
&nmdk_clksrc),
nmdk_clksrc.mult,
nmdk_clksrc.shift);
}
static unsigned long __init boottime_get_time(void)
{
return div_s64(clocksource_cyc2ns(clocksource_dbx500_prcmu.read(
&clocksource_dbx500_prcmu),
clocksource_dbx500_prcmu.mult,
clocksource_dbx500_prcmu.shift),
1000);
}
/**
* Returns current time from boot in nsecs. It's OK for this to wrap
* around for now, as it's just a relative time stamp.
*/
unsigned long long sched_clock(void)
{
if (config.cs_module == TIMER_MODULE_NONE)
return (unsigned long long)(jiffies - INITIAL_JIFFIES)
* (NSEC_PER_SEC / HZ);
else
return clocksource_cyc2ns(bcm_read_timer(NULL),
bcm_clksrc.mult, bcm_clksrc.shift);
}
/*
* Returns current time from boot in nsecs. It's OK for this to wrap
* around for now, as it's just a relative time stamp.
*/
unsigned long long sched_clock(void)
{
struct omap_32k_sync_device *omap = thecs;
if (!omap)
return 0;
return clocksource_cyc2ns(omap->cs.read(&omap->cs),
omap->cs.mult, omap->cs.shift);
}
unsigned long long notrace sched_clock(void)
{
if (timer_initialized) {
struct clocksource *cs = &clocksource_microblaze;
cycle_t cyc = cnt32_to_63(cs->read(NULL)) & LLONG_MAX;
return clocksource_cyc2ns(cyc, cs->mult, cs->shift);
}
return 0;
}
/*
* Returns current time from boot in nsecs. It's OK for this to wrap
* around for now, as it's just a relative time stamp.
*/
unsigned long long sched_clock(void)
{
static int first = 1;
static cycle_t saved_ticks;
static int saved_ticks_valid;
static unsigned long long base;
static unsigned long long last_result;
unsigned long irq_flags;
static cycle_t last_ticks;
cycle_t ticks;
static unsigned long long result;
local_irq_save(irq_flags);
last_ticks = saved_ticks;
saved_ticks = ticks = sec_sched_timer_read();
if(!saved_ticks_valid)
{
saved_ticks_valid = 1;
last_ticks = ticks;
base -= clocksource_cyc2ns(ticks, clocksource_sec.mult, clocksource_sec.shift);
}
if(ticks < last_ticks)
{
if (first)
first = 0;
else
{
base += clocksource_cyc2ns(clocksource_sec.mask, clocksource_sec.mult, clocksource_sec.shift);
base += clocksource_cyc2ns(1, clocksource_sec.mult, clocksource_sec.shift);
}
}
last_result = result = clocksource_cyc2ns(ticks, clocksource_sec.mult, clocksource_sec.shift) + base;
local_irq_restore(irq_flags);
return result;
}
/*
* Returns current time from boot in nsecs. It's OK for this to wrap
* around for now, as it's just a relative time stamp.
*/
unsigned long long sched_clock(void)
{
unsigned long irq_flags;
cycle_t ticks, elapsed_ticks = 0;
unsigned long long increment = 0;
unsigned int overflow_cnt = 0;
local_irq_save(irq_flags);
if (likely(sched_timer_running)) {
overflow_cnt = (s5p_sched_timer_overflows - old_overflows);
ticks = s5p_sched_timer_read(&clocksource_s5p);
if (overflow_cnt) {
increment = (overflow_cnt - 1) *
(clocksource_cyc2ns(clocksource_s5p.read(&clocksource_s5p),
clocksource_s5p.mult, clocksource_s5p.shift));
elapsed_ticks =
(clocksource_s5p.mask - last_ticks) + ticks;
} else {
if (unlikely(last_ticks > ticks)) {
pending_irq = 1;
elapsed_ticks =
(clocksource_s5p.mask - last_ticks) + ticks;
s5p_sched_timer_overflows++;
} else {
elapsed_ticks = (ticks - last_ticks);
}
}
time_stamp += (clocksource_cyc2ns(elapsed_ticks,
clocksource_s5p.mult,
clocksource_s5p.shift) + increment);
old_overflows = s5p_sched_timer_overflows;
last_ticks = ticks;
}
local_irq_restore(irq_flags);
return time_stamp;
}
/*
* sched_clock()
*/
unsigned long long sched_clock(void)
{
static unsigned long last_timeE=0;
static cycle_t cyc=0;
struct clocksource *cs = &clocksource_timer_e;
unsigned long cur;
cur=cycle_read_timerE(NULL);
cyc += cur - last_timeE;
last_timeE=cur;
return clocksource_cyc2ns(cyc, cs->mult, cs->shift);
}
void read_persistent_clock(struct timespec *ts)
{
unsigned long long nsecs;
cycles_t delta;
struct timespec *tsp = &persistent_ts;
last_cycles = cycles;
cycles = timer_32k_base ? __raw_readl(timer_32k_base) : 0;
delta = cycles - last_cycles;
nsecs = clocksource_cyc2ns(delta, persistent_mult, persistent_shift);
timespec_add_ns(tsp, nsecs);
*ts = *tsp;
}
static void omap_read_persistent_clock64(struct timespec64 *ts)
{
unsigned long long nsecs;
cycles_t last_cycles;
last_cycles = cycles;
cycles = sync32k_cnt_reg ? readl_relaxed(sync32k_cnt_reg) : 0;
nsecs = clocksource_cyc2ns(cycles - last_cycles,
persistent_mult, persistent_shift);
timespec64_add_ns(&persistent_ts, nsecs);
*ts = persistent_ts;
}
void read_persistent_clock(struct timespec *ts)
{
unsigned long long nsecs;
cycles_t delta;
struct timespec *tsp = &persistent_ts;
last_cycles = cycles;
cycles = clocksource_32k.read(&clocksource_32k);
delta = cycles - last_cycles;
nsecs = clocksource_cyc2ns(delta,
clocksource_32k.mult, clocksource_32k.shift);
timespec_add_ns(tsp, nsecs);
*ts = *tsp;
}
void read_persistent_clock(struct timespec *ts)
{
unsigned long long nsecs;
cycles_t last_cycles;
unsigned long flags;
spin_lock_irqsave(&read_persistent_clock_lock, flags);
last_cycles = cycles;
cycles = timer_32k_base ? __raw_readl(timer_32k_base) : 0;
nsecs = clocksource_cyc2ns(cycles - last_cycles,
persistent_mult, persistent_shift);
timespec_add_ns(&persistent_ts, nsecs);
*ts = persistent_ts;
spin_unlock_irqrestore(&read_persistent_clock_lock, flags);
}
void read_persistent_clock(struct timespec *ts)
{
unsigned long long nsecs;
cycles_t delta;
struct timespec *tsp = &persistent_ts;
last_cycles = cycles;
cycles = clocksource_32k.read(&clocksource_32k);
delta = cycles - last_cycles;
if (unlikely(cycles < last_cycles)) {
pr_warning("%s: WRAP\n", __func__);
delta = last_cycles - cycles;
}
nsecs = clocksource_cyc2ns(delta,
clocksource_32k.mult, clocksource_32k.shift);
timespec_add_ns(tsp, nsecs);
*ts = *tsp;
}
/*
* sched_clock()
* Returns current time in nano-second units.
*
* Notes:
* 1) This is an override for the weak alias in
* kernel/sched_clock.c.
* 2) Do not use xtime_lock as this function is
* sometimes called with xtime_lock held.
* 3) This approach allows us to perform sched_clock() calls with interrupts
* disabled, since our cycle counter moves forward no matter what.
*/
unsigned long long sched_clock(void)
{
return clocksource_cyc2ns(timer_device_clockbase_read(&timer_device_clockbase),
timer_device_clockbase.mult,
timer_device_clockbase.shift);
}
/*
* Rounds down to nearest nsec.
*/
unsigned long long sec_ticks_to_nsecs(unsigned long ticks)
{
return clocksource_cyc2ns(ticks, clocksource_sec.mult, clocksource_sec.shift);
}
unsigned long long sched_clock(void)
{
return clocksource_cyc2ns(tegra_clocksource.read(&tegra_clocksource),
tegra_clocksource.mult, tegra_clocksource.shift);
}
/*
* Scheduler clock - returns current time in nanosec units.
* Note that with LOCKDEP, this is called during lockdep_init(), and
* we will claim that sched_clock() is zero for a little while, until
* we run setup_clock(), above.
*/
unsigned long long sched_clock(void)
{
return clocksource_cyc2ns(get_cycles(),
sched_clock_mult, SCHED_CLOCK_SHIFT);
}
/*
* Returns current time from boot in nsecs. It's OK for this to wrap
* around for now, as it's just a relative time stamp.
*/
unsigned long long sched_clock(void)
{
return clocksource_cyc2ns(clocksource_32k.read(&clocksource_32k),
clocksource_32k.mult, clocksource_32k.shift);
}
static inline unsigned long long bfin_cs_cycles_sched_clock(void)
{
return clocksource_cyc2ns(bfin_read_cycles(&bfin_cs_cycles),
bfin_cs_cycles.mult, bfin_cs_cycles.shift);
}
/* * Returns current time from boot in nsecs. It's OK for this to wrap * around for now, as it's just a relative time stamp. */
unsigned long long sched_clock(void)
{
return clocksource_cyc2ns(clocksource_timer.read(&clocksource_timer), clocksource_timer.mult, clocksource_timer.shift);
}
static inline unsigned long long bfin_cs_gptimer0_sched_clock(void)
{
return clocksource_cyc2ns(bfin_read_TIMER0_COUNTER(),
bfin_cs_gptimer0.mult, bfin_cs_gptimer0.shift);
}
