Subversion Repositories openrisc_2011-10-31

/*

 *  COPYRIGHT (c) 1989-1999.

 *  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.OARcorp.com/rtems/license.html.

 *

 *  $Id: cre_tsk.c,v 1.2 2001-09-27 11:59:13 chris Exp $

 */

#include <itron.h>

#include <rtems/score/thread.h>

#include <rtems/score/userext.h>

#include <rtems/score/wkspace.h>

#include <rtems/score/apiext.h>

#include <rtems/score/sysstate.h>

#include <rtems/itron/task.h>

/*

 *  cre_tsk - Create Task

 */

ER cre_tsk(

  ID      tskid,

  T_CTSK *pk_ctsk

)

{

  register Thread_Control     *the_thread;

  boolean                      status;

  Priority_Control             core_priority;

  /*

   * Validate Parameters.

   */

 if ( pk_ctsk == NULL )

    return E_PAR;

  if ((pk_ctsk->tskatr != TA_ASM ) &&

      (pk_ctsk->tskatr != TA_HLNG) &&

      (pk_ctsk->tskatr != TA_COP0) &&

      (pk_ctsk->tskatr != TA_COP1) &&

      (pk_ctsk->tskatr != TA_COP2) &&

      (pk_ctsk->tskatr != TA_COP3) &&

      (pk_ctsk->tskatr != TA_COP4) &&

      (pk_ctsk->tskatr != TA_COP5) &&

      (pk_ctsk->tskatr != TA_COP6) &&

      (pk_ctsk->tskatr != TA_COP7))

    return E_RSATR;

  if (( pk_ctsk->itskpri <= 0 ) || ( pk_ctsk->itskpri >= 256 ))

    return E_PAR;

  if ( pk_ctsk->task == NULL )

    return E_PAR;

  if ( pk_ctsk->stksz < 0 )

    return E_PAR;

  /*

   * Disable dispatching.

   */

  _Thread_Disable_dispatch();

  /*

   * allocate the thread.

   */

  the_thread = _ITRON_Task_Allocate( tskid );

  if ( !the_thread )

    _ITRON_return_errorno( _ITRON_Task_Clarify_allocation_id_error( tskid ) );

  /*

   *  Initialize the core thread for this task.

   */

  core_priority = _ITRON_Task_Priority_to_Core( pk_ctsk->itskpri );

  status = _Thread_Initialize(

    &_ITRON_Task_Information,

    the_thread,

    NULL,

    pk_ctsk->stksz,

    TRUE,          /* XXX - All tasks FP for now */

    core_priority,

    TRUE,

    THREAD_CPU_BUDGET_ALGORITHM_EXHAUST_TIMESLICE,

    NULL,        /* no budget algorithm callout */

    0,

    NULL

  );

  if ( !status ) {

    _ITRON_Task_Free( the_thread );

    _ITRON_return_errorno( E_NOMEM );

  }

  /*

   *  This insures we evaluate the process-wide signals pending when we

   *  first run.

   *

   *  NOTE:  Since the thread starts with all unblocked, this is necessary.

   */

  the_thread->do_post_task_switch_extension = TRUE;

  the_thread->Start.entry_point = (Thread_Entry) pk_ctsk->task;

  _ITRON_return_errorno( E_OK );

}