/**
* @file
*
* @ingroup RTEMSImplClassicPartitionMP
*
* @brief This source file contains the implementation to support the Partition
* Manager in multiprocessing (MP) configurations.
*/
/*
* COPYRIGHT (c) 1989-2008.
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/rtems/partimpl.h>
#include <rtems/rtems/statusimpl.h>
#include <rtems/score/statesimpl.h>
#include <rtems/score/threadimpl.h>
#include <rtems/score/threadqimpl.h>
#include <rtems/sysinit.h>
RTEMS_STATIC_ASSERT(
sizeof(Partition_MP_Packet) <= MP_PACKET_MINIMUM_PACKET_SIZE,
Partition_MP_Packet
);
static Partition_MP_Packet *_Partition_MP_Get_packet( void )
{
return (Partition_MP_Packet *) _MPCI_Get_packet();
}
static void _Partition_MP_Initialize_packet(
Partition_MP_Packet *the_packet,
Objects_Id id,
Partition_MP_Remote_operations operation
)
{
the_packet->Prefix.the_class = MP_PACKET_PARTITION;
the_packet->Prefix.length = sizeof( *the_packet );
the_packet->Prefix.to_convert = sizeof( *the_packet );
the_packet->Prefix.id = id;
the_packet->operation = operation;
}
/*
* _Partition_MP_Send_process_packet
*
*/
void _Partition_MP_Send_process_packet (
Partition_MP_Remote_operations operation,
Objects_Id partition_id,
rtems_name name,
Objects_Id proxy_id
)
{
Partition_MP_Packet *the_packet;
uint32_t node;
switch ( operation ) {
case PARTITION_MP_ANNOUNCE_CREATE:
case PARTITION_MP_ANNOUNCE_DELETE:
case PARTITION_MP_EXTRACT_PROXY:
the_packet = _Partition_MP_Get_packet();
_Partition_MP_Initialize_packet( the_packet, partition_id, operation );
the_packet->name = name;
the_packet->proxy_id = proxy_id;
if ( operation == PARTITION_MP_EXTRACT_PROXY )
node = _Objects_Get_node( partition_id );
else
node = MPCI_ALL_NODES;
_MPCI_Send_process_packet( node, &the_packet->Prefix );
break;
case PARTITION_MP_GET_BUFFER_REQUEST:
case PARTITION_MP_GET_BUFFER_RESPONSE:
case PARTITION_MP_RETURN_BUFFER_REQUEST:
case PARTITION_MP_RETURN_BUFFER_RESPONSE:
break;
}
}
/*
* _Partition_MP_Send_request_packet
*
*/
static rtems_status_code _Partition_MP_Send_request_packet (
Objects_Id partition_id,
void *buffer,
Partition_MP_Remote_operations operation
)
{
Partition_MP_Packet *the_packet;
Status_Control status;
if ( !_Partition_MP_Is_remote( partition_id ) ) {
return RTEMS_INVALID_ID;
}
switch ( operation ) {
case PARTITION_MP_GET_BUFFER_REQUEST:
case PARTITION_MP_RETURN_BUFFER_REQUEST:
the_packet = _Partition_MP_Get_packet();
_Partition_MP_Initialize_packet( the_packet, partition_id, operation );
the_packet->buffer = buffer;
status = _MPCI_Send_request_packet(
_Objects_Get_node( partition_id ),
&the_packet->Prefix,
STATES_READY /* Not used */
);
return _Status_Get( status );
case PARTITION_MP_ANNOUNCE_CREATE:
case PARTITION_MP_ANNOUNCE_DELETE:
case PARTITION_MP_EXTRACT_PROXY:
case PARTITION_MP_GET_BUFFER_RESPONSE:
case PARTITION_MP_RETURN_BUFFER_RESPONSE:
break;
}
/*
* The following line is included to satisfy compilers which
* produce warnings when a function does not end with a return.
*/
return RTEMS_SUCCESSFUL;
}
rtems_status_code _Partition_MP_Get_buffer(
rtems_id id,
void **buffer
)
{
_Thread_Get_executing()->Wait.return_argument = buffer;
return _Partition_MP_Send_request_packet(
id,
buffer,
PARTITION_MP_GET_BUFFER_REQUEST
);
}
rtems_status_code _Partition_MP_Return_buffer(
rtems_id id,
void *buffer
)
{
return _Partition_MP_Send_request_packet(
id,
buffer,
PARTITION_MP_RETURN_BUFFER_REQUEST
);
}
/*
* _Partition_MP_Send_response_packet
*
*/
static void _Partition_MP_Send_response_packet (
Partition_MP_Remote_operations operation,
Objects_Id partition_id,
Thread_Control *the_thread
)
{
Partition_MP_Packet *the_packet;
switch ( operation ) {
case PARTITION_MP_GET_BUFFER_RESPONSE:
case PARTITION_MP_RETURN_BUFFER_RESPONSE:
the_packet = ( Partition_MP_Packet *) the_thread->receive_packet;
/*
* The packet being returned already contains the class, length, and
* to_convert fields, therefore they are not set in this routine.
*/
the_packet->operation = operation;
the_packet->Prefix.id = the_packet->Prefix.source_tid;
_MPCI_Send_response_packet(
_Objects_Get_node( the_packet->Prefix.source_tid ),
&the_packet->Prefix
);
break;
case PARTITION_MP_ANNOUNCE_CREATE:
case PARTITION_MP_ANNOUNCE_DELETE:
case PARTITION_MP_EXTRACT_PROXY:
case PARTITION_MP_GET_BUFFER_REQUEST:
case PARTITION_MP_RETURN_BUFFER_REQUEST:
break;
}
}
static void _Partition_MP_Process_packet(
rtems_packet_prefix *the_packet_prefix
)
{
Partition_MP_Packet *the_packet;
Thread_Control *the_thread;
the_packet = (Partition_MP_Packet *) the_packet_prefix;
switch ( the_packet->operation ) {
case PARTITION_MP_ANNOUNCE_CREATE:
_Objects_MP_Allocate_and_open(
&_Partition_Information,
the_packet->name,
the_packet->Prefix.id,
true
);
_MPCI_Return_packet( the_packet_prefix );
break;
case PARTITION_MP_ANNOUNCE_DELETE:
_Objects_MP_Close( &_Partition_Information, the_packet->Prefix.id );
_MPCI_Return_packet( the_packet_prefix );
break;
case PARTITION_MP_EXTRACT_PROXY:
the_thread = _Thread_MP_Find_proxy( the_packet->proxy_id );
if ( the_thread != NULL ) {
_Thread_queue_Extract( the_thread );
}
_MPCI_Return_packet( the_packet_prefix );
break;
case PARTITION_MP_GET_BUFFER_REQUEST:
the_packet->Prefix.return_code = rtems_partition_get_buffer(
the_packet->Prefix.id,
&the_packet->buffer
);
_Partition_MP_Send_response_packet(
PARTITION_MP_GET_BUFFER_RESPONSE,
the_packet->Prefix.id,
_Thread_Executing
);
break;
case PARTITION_MP_GET_BUFFER_RESPONSE:
the_thread = _MPCI_Process_response( the_packet_prefix );
*(void **)the_thread->Wait.return_argument = the_packet->buffer;
_MPCI_Return_packet( the_packet_prefix );
break;
case PARTITION_MP_RETURN_BUFFER_REQUEST:
the_packet->Prefix.return_code = rtems_partition_return_buffer(
the_packet->Prefix.id,
the_packet->buffer
);
_Partition_MP_Send_response_packet(
PARTITION_MP_RETURN_BUFFER_RESPONSE,
the_packet->Prefix.id,
_Thread_Executing
);
break;
case PARTITION_MP_RETURN_BUFFER_RESPONSE:
the_thread = _MPCI_Process_response( the_packet_prefix );
_MPCI_Return_packet( the_packet_prefix );
break;
}
}
/*
* _Partition_MP_Send_object_was_deleted
*
* This routine is not needed by the Partition since a partition
* cannot be deleted when buffers are in use.
*
*/
/*
* _Partition_MP_Send_extract_proxy
*
*/
void _Partition_MP_Send_extract_proxy (
Thread_Control *the_thread,
Objects_Id id
)
{
_Partition_MP_Send_process_packet(
PARTITION_MP_EXTRACT_PROXY,
id,
(rtems_name) 0,
the_thread->Object.id
);
}
static void _Partition_MP_Initialize( void )
{
_MPCI_Register_packet_processor(
MP_PACKET_PARTITION,
_Partition_MP_Process_packet
);
}
RTEMS_SYSINIT_ITEM(
_Partition_MP_Initialize,
RTEMS_SYSINIT_CLASSIC_PARTITION_MP,
RTEMS_SYSINIT_ORDER_MIDDLE
);
