michaelh/zephyr
1
0
Fork 0
Code Releases Activity

drivers: timer: fix the bug for SMP

Browse source 
* fix the smp timer dirver bugs found in debug and test.
for smp case, GFRC is used as clock source, and local
internal timer is used to trigger time event.

* because 64-bits gfrc is used, so idle can be igored as no kernel
tick will be missed

Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
This commit is contained in:
Wayne Ren 2019-10-25 07:41:34 +08:00 • committed by Andrew Boie
commit 66856e5478
1 changed files with 7 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

9
drivers/timer/arcv2_timer0.c
View file

@ -235,7 +235,12 @@ void z_clock_set_timeout(s32_t ticks, bool idle)
* that interrupts are already disabled)
*/
#ifdef CONFIG_SMP
if (IS_ENABLED(CONFIG_TICKLESS_IDLE) && idle && ticks == K_FOREVER) {
/* as 64-bits GFRC is used as wall clock, it's ok to ignore idle
* systick will not be missed.
* However for single core using 32-bits arc timer, idle cannot
* be ignored, as 32-bits timer will overflow in a not-long time.
*/
if (IS_ENABLED(CONFIG_TICKLESS_IDLE) && ticks == K_FOREVER) {
timer0_control_register_set(0);
timer0_count_register_set(0);
timer0_limit_register_set(0);
@ -246,7 +251,7 @@ void z_clock_set_timeout(s32_t ticks, bool idle)
u32_t delay;
u32_t key;
ticks = MIN(MAX_TICKS, MAX(ticks - 1, 0));
ticks = MIN(MAX_TICKS, ticks);
/* Desired delay in the future */
delay = (ticks == 0) ? CYC_PER_TICK : ticks * CYC_PER_TICK;