/*
* RTEMS Task Manager -- Initialize Manager
*
* COPYRIGHT (c) 1989-2009.
* 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.
*
* $Id$
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/system.h>
#include <rtems/config.h>
#include <rtems/rtems/status.h>
#include <rtems/rtems/support.h>
#include <rtems/rtems/modes.h>
#include <rtems/score/object.h>
#include <rtems/score/stack.h>
#include <rtems/score/states.h>
#include <rtems/rtems/tasks.h>
#include <rtems/score/thread.h>
#include <rtems/score/threadq.h>
#include <rtems/score/tod.h>
#include <rtems/score/userext.h>
#include <rtems/score/wkspace.h>
#include <rtems/score/apiext.h>
#include <rtems/score/sysstate.h>
/*
* _RTEMS_tasks_Create_extension
*
* This routine is an extension routine that is invoked as part
* of creating any type of task or thread in the system. If the
* task is created via another API, then this routine is invoked
* and this API given the opportunity to initialize its extension
* area.
*/
bool _RTEMS_tasks_Create_extension(
Thread_Control *executing,
Thread_Control *created
)
{
RTEMS_API_Control *api;
int i;
size_t to_allocate;
/*
* Notepads must be the last entry in the structure and they
* can be left off if disabled in the configuration.
*/
to_allocate = sizeof( RTEMS_API_Control );
if ( !rtems_configuration_get_notepads_enabled() )
to_allocate -= (RTEMS_NUMBER_NOTEPADS * sizeof(uint32_t));
api = _Workspace_Allocate( to_allocate );
if ( !api )
return false;
created->API_Extensions[ THREAD_API_RTEMS ] = api;
api->pending_events = EVENT_SETS_NONE_PENDING;
api->event_condition = 0;
_ASR_Initialize( &api->Signal );
created->task_variables = NULL;
if ( rtems_configuration_get_notepads_enabled() ) {
for (i=0; i < RTEMS_NUMBER_NOTEPADS; i++)
api->Notepads[i] = 0;
}
return true;
}
/*
* _RTEMS_tasks_Start_extension
*
* This extension routine is invoked when a task is started for the
* first time.
*/
void _RTEMS_tasks_Start_extension(
Thread_Control *executing,
Thread_Control *started
)
{
RTEMS_API_Control *api;
api = started->API_Extensions[ THREAD_API_RTEMS ];
api->pending_events = EVENT_SETS_NONE_PENDING;
}
/*
* _RTEMS_tasks_Delete_extension
*
* This extension routine is invoked when a task is deleted.
*/
void _RTEMS_tasks_Delete_extension(
Thread_Control *executing,
Thread_Control *deleted
)
{
rtems_task_variable_t *tvp, *next;
/*
* Free per task variable memory
*/
tvp = deleted->task_variables;
deleted->task_variables = NULL;
while (tvp) {
next = (rtems_task_variable_t *)tvp->next;
_RTEMS_Tasks_Invoke_task_variable_dtor( deleted, tvp );
tvp = next;
}
/*
* Free API specific memory
*/
(void) _Workspace_Free( deleted->API_Extensions[ THREAD_API_RTEMS ] );
deleted->API_Extensions[ THREAD_API_RTEMS ] = NULL;
}
/*
* _RTEMS_tasks_Switch_extension
*
* This extension routine is invoked at each context switch.
*/
void _RTEMS_tasks_Switch_extension(
Thread_Control *executing,
Thread_Control *heir
)
{
rtems_task_variable_t *tvp;
/*
* Per Task Variables
*/
tvp = executing->task_variables;
while (tvp) {
tvp->tval = *tvp->ptr;
*tvp->ptr = tvp->gval;
tvp = (rtems_task_variable_t *)tvp->next;
}
tvp = heir->task_variables;
while (tvp) {
tvp->gval = *tvp->ptr;
*tvp->ptr = tvp->tval;
tvp = (rtems_task_variable_t *)tvp->next;
}
}
/*
* _RTEMS_tasks_Post_switch_extension
*
* This extension routine is invoked at each context switch.
*/
void _RTEMS_tasks_Post_switch_extension(
Thread_Control *executing
)
{
ISR_Level level;
RTEMS_API_Control *api;
ASR_Information *asr;
rtems_signal_set signal_set;
Modes_Control prev_mode;
api = executing->API_Extensions[ THREAD_API_RTEMS ];
if ( !api )
return;
/*
* Signal Processing
*/
asr = &api->Signal;
_ISR_Disable( level );
signal_set = asr->signals_posted;
asr->signals_posted = 0;
_ISR_Enable( level );
if ( !signal_set ) /* similar to _ASR_Are_signals_pending( asr ) */
return;
asr->nest_level += 1;
rtems_task_mode( asr->mode_set, RTEMS_ALL_MODE_MASKS, &prev_mode );
(*asr->handler)( signal_set );
asr->nest_level -= 1;
rtems_task_mode( prev_mode, RTEMS_ALL_MODE_MASKS, &prev_mode );
}
API_extensions_Control _RTEMS_tasks_API_extensions = {
{ NULL, NULL },
#if defined(FUNCTIONALITY_NOT_CURRENTLY_USED_BY_ANY_API)
NULL, /* predriver */
#endif
_RTEMS_tasks_Initialize_user_tasks, /* postdriver */
_RTEMS_tasks_Post_switch_extension /* post switch */
};
User_extensions_Control _RTEMS_tasks_User_extensions = {
{ NULL, NULL },
{ { NULL, NULL }, _RTEMS_tasks_Switch_extension },
{ _RTEMS_tasks_Create_extension, /* create */
_RTEMS_tasks_Start_extension, /* start */
_RTEMS_tasks_Start_extension, /* restart */
_RTEMS_tasks_Delete_extension, /* delete */
_RTEMS_tasks_Switch_extension, /* switch */
NULL, /* begin */
NULL, /* exitted */
NULL /* fatal */
}
};
/*
* _RTEMS_tasks_Manager_initialization
*
* This routine initializes all Task Manager related data structures.
*
* Input parameters: NONE
*
* Output parameters: NONE
*/
void _RTEMS_tasks_Manager_initialization(void)
{
_Objects_Initialize_information(
&_RTEMS_tasks_Information, /* object information table */
OBJECTS_CLASSIC_API, /* object API */
OBJECTS_RTEMS_TASKS, /* object class */
Configuration_RTEMS_API.maximum_tasks,
/* maximum objects of this class */
sizeof( Thread_Control ), /* size of this object's control block */
false, /* true if the name is a string */
RTEMS_MAXIMUM_NAME_LENGTH /* maximum length of an object name */
#if defined(RTEMS_MULTIPROCESSING)
,
true, /* true if this is a global object class */
NULL /* Proxy extraction support callout */
#endif
);
/*
* Add all the extensions for this API
*/
_User_extensions_Add_API_set( &_RTEMS_tasks_User_extensions );
_API_extensions_Add( &_RTEMS_tasks_API_extensions );
/*
* Register the MP Process Packet routine.
*/
#if defined(RTEMS_MULTIPROCESSING)
_MPCI_Register_packet_processor(
MP_PACKET_TASKS,
_RTEMS_tasks_MP_Process_packet
);
#endif
}
/*
* _RTEMS_tasks_Initialize_user_tasks
*
* This routine creates and starts all configured user
* initialzation threads.
*
* Input parameters: NONE
*
* Output parameters: NONE
*/
void _RTEMS_tasks_Initialize_user_tasks( void )
{
if ( _RTEMS_tasks_Initialize_user_tasks_p )
(*_RTEMS_tasks_Initialize_user_tasks_p)();
}
