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score: Add _Per_CPU_Wait_for_job()

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This commit is contained in:
Sebastian Huber
2019-05-20 09:06:48 +02:00
parent 9b8e85e23a
commit 41cddcc6e1
2 changed files with 48 additions and 27 deletions
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14
cpukit/include/rtems/score/percpu.h
View File

@@ -811,6 +811,20 @@ void _Per_CPU_Perform_jobs( Per_CPU_Control *cpu );
*/
void _Per_CPU_Add_job( Per_CPU_Control *cpu, Per_CPU_Job *job );
/**
* @brief Waits for the job carried out by the specified processor.
*
* This function may result in an SMP_FATAL_WRONG_CPU_STATE_TO_PERFORM_JOBS
* fatal error.
*
* @param[in] cpu The processor carrying out the job.
* @param[in] job The job to wait for.
*/
void _Per_CPU_Wait_for_job(
const Per_CPU_Control *cpu,
const Per_CPU_Job *job
);
#endif /* defined( RTEMS_SMP ) */
/*

59
cpukit/score/src/smpmulticastaction.c
View File

@@ -102,6 +102,36 @@ static void _Per_CPU_Try_perform_jobs( Per_CPU_Control *cpu_self )
}
}
void _Per_CPU_Wait_for_job(
const Per_CPU_Control *cpu,
const Per_CPU_Job *job
)
{
while (
_Atomic_Load_ulong( &job->done, ATOMIC_ORDER_ACQUIRE )
!= PER_CPU_JOB_DONE
) {
switch ( cpu->state ) {
case PER_CPU_STATE_INITIAL:
case PER_CPU_STATE_READY_TO_START_MULTITASKING:
case PER_CPU_STATE_REQUEST_START_MULTITASKING:
_CPU_SMP_Processor_event_broadcast();
/* Fall through */
case PER_CPU_STATE_UP:
/*
* Calling this function with the current processor is intentional.
* We have to perform our own jobs here in case inter-processor
* interrupts are not working.
*/
_Per_CPU_Try_perform_jobs( _Per_CPU_Get() );
break;
default:
_SMP_Fatal( SMP_FATAL_WRONG_CPU_STATE_TO_PERFORM_JOBS );
break;
}
}
}
typedef struct {
Per_CPU_Job_context Context;
Per_CPU_Job Jobs[ CPU_MAXIMUM_PROCESSORS ];
@@ -140,35 +170,12 @@ static void _SMP_Wait_for_action_jobs(
for ( cpu_index = 0; cpu_index < cpu_max; ++cpu_index ) {
if ( _Processor_mask_Is_set( targets, cpu_index ) ) {
const Per_CPU_Control *cpu;
const Per_CPU_Job *job;
Per_CPU_Control *cpu;
job = &jobs->Jobs[ cpu_index ];
cpu = _Per_CPU_Get_by_index( cpu_index );
while (
_Atomic_Load_ulong( &job->done, ATOMIC_ORDER_ACQUIRE )
!= PER_CPU_JOB_DONE
) {
switch ( cpu->state ) {
case PER_CPU_STATE_INITIAL:
case PER_CPU_STATE_READY_TO_START_MULTITASKING:
case PER_CPU_STATE_REQUEST_START_MULTITASKING:
_CPU_SMP_Processor_event_broadcast();
/* Fall through */
case PER_CPU_STATE_UP:
/*
* Calling this function with the current processor is intentional.
* We have to perform our own jobs here in case inter-processor
* interrupts are not working.
*/
_Per_CPU_Try_perform_jobs( _Per_CPU_Get() );
break;
default:
_SMP_Fatal( SMP_FATAL_WRONG_CPU_STATE_TO_PERFORM_JOBS );
break;
}
}
job = &jobs->Jobs[ cpu_index ];
_Per_CPU_Wait_for_job( cpu, job );
}
}
}