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/*

 *  Initialization Manager

 *

 *  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: exinit.c,v 1.2 2001-09-27 11:59:20 chris Exp $

 */

/*

 *  SCORE_INIT and SAPI_INIT are defined so all of the super core and

 *  super API data will be included in this object file.

 */

#define SAPI_INIT

#define SCORE_INIT

#include <rtems/system.h>

#include <rtems/config.h>

#include <rtems/debug.h>

#include <rtems/extension.h>

#include <rtems/fatal.h>

#include <rtems/init.h>

#include <rtems/io.h>

#include <rtems/score/sysstate.h>

#include <rtems/score/apiext.h>

#include <rtems/score/copyrt.h>

#include <rtems/score/heap.h>

#include <rtems/score/interr.h>

#include <rtems/score/isr.h>

#if defined(RTEMS_MULTIPROCESSING)

#include <rtems/score/mpci.h>

#endif

#include <rtems/score/priority.h>

#include <rtems/score/thread.h>

#include <rtems/score/tod.h>

#include <rtems/score/userext.h>

#include <rtems/score/watchdog.h>

#include <rtems/score/wkspace.h>

#include <rtems/directives.h>

#include <rtems/sptables.h>

#include <rtems/rtems/rtemsapi.h>

#ifdef RTEMS_POSIX_API

#include <rtems/posix/posixapi.h>

#endif

#ifdef RTEMS_ITRON_API

#include <rtems/itron/itronapi.h>

#endif

/*PAGE

 *

 *  rtems_initialize_executive

 *

 *  This directive initializes all the kernels data structures

 *  to the states necessary for the kernel to begin execution.  All

 *  include files that contain global variable definitions should be

 *  included in this file.  The system threads and initialization threads

 *  are created and started by this routine.  This routine then

 *  initiates multithreading.

 *

 *  Input parameters:

 *    configuration_table - pointer to the user's configuration table

 *    cpu_table           - pointer to the user's CPU configuration table

 *

 *  Output parameters:  NONE

 */

void rtems_initialize_executive(

  rtems_configuration_table *configuration_table,

  rtems_cpu_table           *cpu_table

)

{

  rtems_interrupt_level bsp_level;

  bsp_level = rtems_initialize_executive_early(configuration_table, cpu_table);

  rtems_initialize_executive_late( bsp_level );

}

rtems_interrupt_level rtems_initialize_executive_early(

  rtems_configuration_table *configuration_table,

  rtems_cpu_table           *cpu_table

)

{

  rtems_interrupt_level        bsp_level;

  rtems_multiprocessing_table *multiprocessing_table;

  /*

   *  Dispatching and interrupts are disabled until the end of the

   *  initialization sequence.  This prevents an inadvertent context

   *  switch before the executive is initialized.

   */

  _ISR_Disable( bsp_level );

  if ( configuration_table == NULL )

    _Internal_error_Occurred(

      INTERNAL_ERROR_CORE,

      TRUE,

      INTERNAL_ERROR_NO_CONFIGURATION_TABLE

    );

  /*

   *  Initialize the system state based on whether this is an MP system.

   */

#if defined(RTEMS_MULTIPROCESSING)

  multiprocessing_table = configuration_table->User_multiprocessing_table;

  _System_state_Handler_initialization(

    (multiprocessing_table) ? TRUE : FALSE

  );

#else

  multiprocessing_table = NULL;

  _System_state_Handler_initialization( FALSE );

#endif

  /*

   *  Provided just for user convenience.

   */

  _Configuration_Table    = configuration_table;

  _Configuration_MP_table = multiprocessing_table;

  /*

   *  Internally we view single processor systems as a very restricted

   *  multiprocessor system.

   */

  if ( multiprocessing_table == NULL )

    multiprocessing_table =

      (void *)&_Initialization_Default_multiprocessing_table;

  if ( cpu_table == NULL )

    _Internal_error_Occurred(

      INTERNAL_ERROR_CORE,

      TRUE,

      INTERNAL_ERROR_NO_CPU_TABLE

    );

  _CPU_Initialize( cpu_table, _Thread_Dispatch );

  /*

   *  Do this as early as possible to insure no debugging output

   *  is even attempted to be printed.

   */

  _Debug_Manager_initialization();

  _API_extensions_Initialization();

  _Thread_Dispatch_initialization();

  _Workspace_Handler_initialization(

     (void *)configuration_table->work_space_start,

     configuration_table->work_space_size

  );

  _User_extensions_Handler_initialization(

    configuration_table->number_of_initial_extensions,

    configuration_table->User_extension_table

  );

  _ISR_Handler_initialization();

  _Objects_Handler_initialization(

    multiprocessing_table->node,

    multiprocessing_table->maximum_nodes,

    multiprocessing_table->maximum_global_objects

  );

  _Priority_Handler_initialization();

  _Watchdog_Handler_initialization();

  _TOD_Handler_initialization( configuration_table->microseconds_per_tick );

  _Thread_Handler_initialization(

    configuration_table->ticks_per_timeslice,

    configuration_table->maximum_extensions,

    multiprocessing_table->maximum_proxies

  );

#if defined(RTEMS_MULTIPROCESSING)

  _MPCI_Handler_initialization(

    multiprocessing_table->User_mpci_table,

    RTEMS_TIMEOUT

  );

#endif

/* MANAGERS */

  _Extension_Manager_initialization( configuration_table->maximum_extensions );

  _IO_Manager_initialization(

    configuration_table->Device_driver_table,

    configuration_table->number_of_device_drivers,

    configuration_table->maximum_devices

  );

  _RTEMS_API_Initialize( configuration_table );

#ifdef RTEMS_POSIX_API

  _POSIX_API_Initialize( configuration_table );

#endif

#ifdef RTEMS_ITRON_API

  _ITRON_API_Initialize( configuration_table );

#endif

  _System_state_Set( SYSTEM_STATE_BEFORE_MULTITASKING );

  if ( cpu_table->pretasking_hook )

    (*cpu_table->pretasking_hook)();

  /*

   *  No threads should be created before this point!!!

   *

   *  At this point all API extensions are in place.  After the call to

   *  _Thread_Create_idle() _Thread_Executing will be set.

   *  and _Thread_Heir are not set yet.

   */

  _Thread_Create_idle();

#if defined(RTEMS_MULTIPROCESSING)

  _MPCI_Create_server();

#endif

  /*

   *  Run the API and BSPs predriver hook.

   */

  _API_extensions_Run_predriver();

  if ( _CPU_Table.predriver_hook )

    (*_CPU_Table.predriver_hook)();

  /*

   *  Initialize all the device drivers and initialize the MPCI layer.

   *

   *  NOTE:  The MPCI may be build upon a device driver.

   */

  _IO_Initialize_all_drivers();

#if defined(RTEMS_MULTIPROCESSING)

  if ( _System_state_Is_multiprocessing ) {

    _MPCI_Initialization();

    _MPCI_Internal_packets_Send_process_packet(

      MPCI_PACKETS_SYSTEM_VERIFY

    );

  }

#endif

  /*

   *  Run the APIs and BSPs postdriver hooks.

   *

   *  The API extensions are supposed to create user initialization tasks.

   */

  _API_extensions_Run_postdriver();

  if ( _CPU_Table.postdriver_hook )

    (*_CPU_Table.postdriver_hook)();

  return bsp_level;

}

void rtems_initialize_executive_late(

  rtems_interrupt_level bsp_level

)

{

  _System_state_Set( SYSTEM_STATE_BEGIN_MULTITASKING );

  _Thread_Start_multitasking();

  /*

   *  Restore the interrupt level to what the BSP had.  Technically,

   *  this is unnecessary since the BSP should have all interrupts

   *  disabled when rtems_initialize_executive is invoked.  But this keeps

   *  the ISR Disable/Enable calls paired.

   */

  _ISR_Enable( bsp_level );

}

/*PAGE

 *

 *  rtems_shutdown_executive

 *

 *  This kernel routine shutdowns the executive.  It halts multitasking

 *  and returns control to the application execution "thread" which

 *  initialially invoked the rtems_initialize_executive directive.

 *

 *  Input parameters:   NONE

 *

 *  Output parameters:  NONE

 */

void rtems_shutdown_executive(

   unsigned32 result

)

{

  if ( _System_state_Current != SYSTEM_STATE_SHUTDOWN ) {

    _System_state_Set( SYSTEM_STATE_SHUTDOWN );

    _Thread_Stop_multitasking();

  }

}