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/**
* @file
*
* @brief Create Idle Thread
* @ingroup ScoreThread
*/
/*
* COPYRIGHT (c) 1989-2011.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/system.h>
#include <rtems/score/apiext.h>
#include <rtems/score/context.h>
#include <rtems/score/interr.h>
#include <rtems/score/isr.h>
#include <rtems/score/object.h>
#include <rtems/score/priority.h>
#include <rtems/score/smp.h>
#include <rtems/score/states.h>
#include <rtems/score/sysstate.h>
#include <rtems/score/thread.h>
#include <rtems/score/threadq.h>
#include <rtems/score/wkspace.h>
#include <rtems/config.h>
static void _Thread_Create_idle_for_cpu( Per_CPU_Control *per_cpu )
{
Objects_Name name;
Thread_Control *idle;
name.name_u32 = _Objects_Build_name( 'I', 'D', 'L', 'E' );
/*
* The entire workspace is zeroed during its initialization. Thus, all
* fields not explicitly assigned were explicitly zeroed by
* _Workspace_Initialization.
*/
idle = _Thread_Internal_allocate();
_Thread_Initialize(
&_Thread_Internal_information,
idle,
NULL, /* allocate the stack */
_Stack_Ensure_minimum( rtems_configuration_get_idle_task_stack_size() ),
CPU_IDLE_TASK_IS_FP,
PRIORITY_MAXIMUM,
true, /* preemptable */
THREAD_CPU_BUDGET_ALGORITHM_NONE,
NULL, /* no budget algorithm callout */
0, /* all interrupts enabled */
name
);
/*
* WARNING!!! This is necessary to "kick" start the system and
* MUST be done before _Thread_Start is invoked.
*/
per_cpu->heir =
per_cpu->executing = idle;
_Thread_Start(
idle,
THREAD_START_NUMERIC,
rtems_configuration_get_idle_task(),
NULL,
0
);
}
void _Thread_Create_idle( void )
{
uint32_t processor_count = _SMP_Get_processor_count();
uint32_t processor;
for ( processor = 0 ; processor < processor_count ; ++processor ) {
Per_CPU_Control *per_cpu = &_Per_CPU_Information[ processor ];
_Thread_Create_idle_for_cpu( per_cpu );
}
}
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