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bsps/clock: Fix fast idle clock tick support

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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.
This commit is contained in:
Sebastian Huber
2020-07-23 08:42:59 +02:00
parent 1fab9726c9
commit 33314eb60a
2 changed files with 22 additions and 9 deletions
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12
bsps/powerpc/shared/clock/clock-ppc-dec.c
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@@ -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();