/*
* cpu_up:
*
* Flag specified cpu as up and running. Called when a processor comes
* online.
*/
void
cpu_up(
int cpu)
{
register struct machine_slot *ms;
register processor_t processor;
spl_t s;
processor = cpu_to_processor(cpu);
/*
* Can't risk blocking with no current thread established.
* Just twiddle our thumbs; we've got nothing better to do
* yet, anyway.
*/
while (!pset_lock_try(&default_pset))
;
s = splsched();
processor_lock(processor);
#if NCPUS > 1
init_ast_check(processor);
#endif /* NCPUS > 1 */
ms = &machine_slot[cpu];
ms->running = TRUE;
machine_info.avail_cpus++;
pset_add_processor(&default_pset, processor);
processor->state = PROCESSOR_RUNNING;
processor_unlock(processor);
splx(s);
pset_unlock(&default_pset);
}
/*
* processor_up:
*
* Flag processor as up and running, and available
* for scheduling.
*/
void
processor_up(
processor_t processor)
{
processor_set_t pset;
spl_t s;
s = splsched();
init_ast_check(processor);
pset = processor->processor_set;
pset_lock(pset);
++pset->online_processor_count;
enqueue_tail(&pset->active_queue, (queue_entry_t)processor);
processor->state = PROCESSOR_RUNNING;
(void)hw_atomic_add(&processor_avail_count, 1);
commpage_update_active_cpus();
pset_unlock(pset);
ml_cpu_up();
splx(s);
#if CONFIG_DTRACE
if (dtrace_cpu_state_changed_hook)
(*dtrace_cpu_state_changed_hook)(processor->cpu_id, TRUE);
#endif
}