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arc timer: Fix tickless idle tick announcement

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Change-Id: Iad6806c7be76661987652a63deb70a740c0d8e15
Signed-off-by: Peter Mitsis <peter.mitsis@windriver.com>
This commit is contained in:
Peter Mitsis 2015-12-16 10:34:41 -05:00 committed by Anas Nashif
parent 7e5dd561ca
commit aad3ba5134
1 changed files with 7 additions and 13 deletions
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20
drivers/timer/arcv2_timer0.c
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@ -159,7 +159,8 @@ static ALWAYS_INLINE void update_accumulated_count(void)
*
* @brief System clock periodic tick handler
*
* This routine handles the system clock periodic tick interrupt.
* This routine handles the system clock periodic tick interrupt. It always
* announces one tick.
*
* @return N/A
*/
@ -173,16 +174,11 @@ void _timer_int_handler(void *unused)
#if defined(CONFIG_TICKLESS_IDLE)
timer0_limit_register_set(cycles_per_tick - 1);
_sys_idle_elapsed_ticks++;
_sys_idle_elapsed_ticks = 1;
#endif
update_accumulated_count();
if (_sys_idle_elapsed_ticks == 1) {
_sys_clock_tick_announce();
}
#else
update_accumulated_count();
_sys_clock_tick_announce();
#endif
}
#if defined(CONFIG_TICKLESS_IDLE)
@ -246,10 +242,6 @@ void _timer_idle_enter(int32_t ticks)
* timer out of idle mode and generating an interrupt at the next tick
* interval. It is expected that interrupts have been disabled.
*
* Note that in this routine, _sys_idle_elapsed_ticks must be zero because the
* ticker has done its work and consumed all the ticks. This has to be true
* otherwise idle mode wouldn't have been entered in the first place.
*
* RETURNS: N/A
*/
@ -257,7 +249,6 @@ void _timer_idle_exit(void)
{
if (straddled_tick_on_idle_enter) {
/* Aborting the tickless idle due to a straddled tick. */
_sys_idle_elapsed_ticks = 0;
straddled_tick_on_idle_enter = false;
return;
}
@ -275,6 +266,8 @@ void _timer_idle_exit(void)
*/
_sys_idle_elapsed_ticks = programmed_ticks - 1;
update_accumulated_count();
_sys_clock_tick_announce();
return;
}
@ -288,6 +281,7 @@ void _timer_idle_exit(void)
_sys_idle_elapsed_ticks = current_count / cycles_per_tick;
if (_sys_idle_elapsed_ticks > 0) {
update_accumulated_count();
_sys_clock_tick_announce();
}