forked from Imagelibrary/rtems
a08dcb2f7c
Add the Thread_Configuration structure to reduce the parameter count of _Thread_Initialize(). This makes it easier to add more parameters in the future. It simplifies the code generation since most architectures do not have that many registers available for function parameters. Update #3835.
98 lines
2.5 KiB
C
98 lines
2.5 KiB
C
/**
|
|
* @file
|
|
*
|
|
* @brief Create Idle Thread
|
|
* @ingroup RTEMSScoreThread
|
|
*/
|
|
|
|
/*
|
|
* 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.org/license/LICENSE.
|
|
*/
|
|
|
|
#if HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <rtems/score/threadimpl.h>
|
|
#include <rtems/score/assert.h>
|
|
#include <rtems/score/schedulerimpl.h>
|
|
#include <rtems/score/sysstate.h>
|
|
#include <rtems/score/userextimpl.h>
|
|
#include <rtems/config.h>
|
|
|
|
#include <string.h>
|
|
|
|
static void _Thread_Create_idle_for_CPU( Per_CPU_Control *cpu )
|
|
{
|
|
Thread_Configuration config;
|
|
Thread_Control *idle;
|
|
|
|
memset( &config, 0, sizeof( config ) );
|
|
config.scheduler = _Scheduler_Get_by_CPU( cpu );
|
|
|
|
#if defined(RTEMS_SMP)
|
|
if ( config.scheduler == NULL ) {
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
config.stack_size = rtems_configuration_get_idle_task_stack_size();
|
|
config.priority = _Scheduler_Map_priority(
|
|
config.scheduler,
|
|
config.scheduler->maximum_priority
|
|
);
|
|
config.budget_algorithm = THREAD_CPU_BUDGET_ALGORITHM_NONE;
|
|
config.name.name_u32 = _Objects_Build_name( 'I', 'D', 'L', 'E' );
|
|
config.is_fp = CPU_IDLE_TASK_IS_FP;
|
|
config.is_preemptible = true;
|
|
|
|
/*
|
|
* The entire workspace is zeroed during its initialization. Thus, all
|
|
* fields not explicitly assigned were explicitly zeroed by
|
|
* _Workspace_Initialization.
|
|
*/
|
|
idle = _Thread_Internal_allocate();
|
|
_Assert( idle != NULL );
|
|
|
|
_Thread_Initialize( &_Thread_Information, idle, &config );
|
|
|
|
/*
|
|
* WARNING!!! This is necessary to "kick" start the system and
|
|
* MUST be done before _Thread_Start is invoked.
|
|
*/
|
|
cpu->heir =
|
|
cpu->executing = idle;
|
|
|
|
idle->is_idle = true;
|
|
idle->Start.Entry.adaptor = _Thread_Entry_adaptor_idle;
|
|
idle->Start.Entry.Kinds.Idle.entry = rtems_configuration_get_idle_task();
|
|
|
|
_Thread_Load_environment( idle );
|
|
|
|
idle->current_state = STATES_READY;
|
|
_Scheduler_Start_idle( config.scheduler, idle, cpu );
|
|
_User_extensions_Thread_start( idle );
|
|
}
|
|
|
|
void _Thread_Create_idle( void )
|
|
{
|
|
uint32_t cpu_max;
|
|
uint32_t cpu_index;
|
|
|
|
_System_state_Set( SYSTEM_STATE_BEFORE_MULTITASKING );
|
|
cpu_max = _SMP_Get_processor_maximum();
|
|
|
|
for ( cpu_index = 0 ; cpu_index < cpu_max ; ++cpu_index ) {
|
|
Per_CPU_Control *cpu = _Per_CPU_Get_by_index( cpu_index );
|
|
|
|
if ( _Per_CPU_Is_processor_online( cpu ) ) {
|
|
_Thread_Create_idle_for_CPU( cpu );
|
|
}
|
|
}
|
|
}
|