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| author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2020-07-23 08:42:59 +0200 |
|---|---|---|
| committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2020-07-23 08:56:06 +0200 |
| commit | 33314eb60acc23e4a98c9f037631b6f35513d511 (patch) | |
| tree | a8c2de7e0af2e160de11390785e416ae382d2b3e /bsps/powerpc | |
| parent | score: Improve _Thread_Start() description (diff) | |
| download | rtems-33314eb60acc23e4a98c9f037631b6f35513d511.tar.bz2 | |
bsps/clock: Fix fast idle clock tick support
If we interrupt a thread dispatch critical section (thread dispatch
disable level != ISR nest level), then we should not do the fast idle
mode since this may delay an ongoing system call forever.
Diffstat (limited to 'bsps/powerpc')
| -rw-r--r-- | bsps/powerpc/shared/clock/clock-ppc-dec.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/bsps/powerpc/shared/clock/clock-ppc-dec.c b/bsps/powerpc/shared/clock/clock-ppc-dec.c index 798cf2a75b..a1f9ebd599 100644 --- a/bsps/powerpc/shared/clock/clock-ppc-dec.c +++ b/bsps/powerpc/shared/clock/clock-ppc-dec.c @@ -98,15 +98,21 @@ void clockOn(void* unused) static void clockHandler(void) { #if (CLOCK_DRIVER_USE_FAST_IDLE == 1) - rtems_interrupt_level level; - uint32_t tb; + rtems_interrupt_level level; + uint32_t tb; + Per_CPU_Control *cpu_self; rtems_interrupt_disable(level); tb = ppc_time_base(); rtems_timecounter_tick(); + cpu_self = _Per_CPU_Get(); - while ( _Thread_Heir == _Thread_Executing && _Thread_Executing->is_idle ) { + while ( + cpu_self->thread_dispatch_disable_level == cpu_self->isr_nest_level + && cpu_self->heir == cpu_self->executing + && cpu_self->executing->is_idle + ) { tb += Clock_Decrementer_value; ppc_set_time_base( tb ); rtems_timecounter_tick(); |