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/**
* @file
*
* @brief Start Thread Multitasking
* @ingroup ScoreThread
*/
/*
* COPYRIGHT (c) 1989-2006.
* 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/score/threadimpl.h>
#include <rtems/score/sysstate.h>
void _Thread_Start_multitasking( void )
{
/*
* The system is now multitasking and completely initialized.
* This system thread now "hides" in a single processor until
* the system is shut down.
*/
_System_state_Set( SYSTEM_STATE_UP );
_Thread_Dispatch_necessary = false;
#if defined(RTEMS_SMP)
_Thread_Executing->is_executing = false;
_Thread_Heir->is_executing = true;
#endif
_Thread_Executing = _Thread_Heir;
/*
* Get the init task(s) running.
*
* Note: Thread_Dispatch() is normally used to dispatch threads. As
* part of its work, Thread_Dispatch() restores floating point
* state for the heir task.
*
* This code avoids Thread_Dispatch(), and so we have to restore
* (actually initialize) the floating point state "by hand".
*
* Ignore the CPU_USE_DEFERRED_FP_SWITCH because we must always
* switch in the first thread if it is FP.
*/
#if ( CPU_HARDWARE_FP == TRUE ) || ( CPU_SOFTWARE_FP == TRUE )
/*
* don't need to worry about saving BSP's floating point state
*/
if ( _Thread_Heir->fp_context != NULL )
_Context_Restore_fp( &_Thread_Heir->fp_context );
#endif
#if defined(_CPU_Start_multitasking)
_CPU_Start_multitasking( &_Thread_BSP_context, &_Thread_Heir->Registers );
#else
_Context_Switch( &_Thread_BSP_context, &_Thread_Heir->Registers );
#endif
}
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