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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [exec/] [score/] [src/] [mpci.c] - Rev 619
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/* * Multiprocessing Communications Interface (MPCI) Handler * * * 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: mpci.c,v 1.2 2001-09-27 11:59:34 chris Exp $ */ #include <rtems/system.h> #include <rtems/score/cpu.h> #include <rtems/score/interr.h> #if defined(RTEMS_MULTIPROCESSING) #include <rtems/score/mpci.h> #include <rtems/score/mppkt.h> #endif #include <rtems/score/states.h> #include <rtems/score/thread.h> #include <rtems/score/threadq.h> #include <rtems/score/tqdata.h> #include <rtems/score/watchdog.h> #include <rtems/score/sysstate.h> #include <rtems/score/coresem.h> /*PAGE * * _MPCI_Handler_initialization * * This subprogram performs the initialization necessary for this handler. */ void _MPCI_Handler_initialization( MPCI_Control *users_mpci_table, unsigned32 timeout_status ) { CORE_semaphore_Attributes attributes; if ( _System_state_Is_multiprocessing && !users_mpci_table ) _Internal_error_Occurred( INTERNAL_ERROR_CORE, TRUE, INTERNAL_ERROR_NO_MPCI ); _MPCI_table = users_mpci_table; if ( !_System_state_Is_multiprocessing ) return; /* * Register the MP Process Packet routine. */ _MPCI_Register_packet_processor( MP_PACKET_MPCI_INTERNAL, _MPCI_Internal_packets_Process_packet ); /* * Create the counting semaphore used by the MPCI Receive Server. */ attributes.discipline = CORE_SEMAPHORE_DISCIPLINES_FIFO; _CORE_semaphore_Initialize( &_MPCI_Semaphore, OBJECTS_NO_CLASS, /* free floating semaphore */ &attributes, /* the_semaphore_attributes */ 0, /* initial_value */ NULL /* proxy_extract_callout */ ); _Thread_queue_Initialize( &_MPCI_Remote_blocked_threads, OBJECTS_NO_CLASS, THREAD_QUEUE_DISCIPLINE_FIFO, STATES_WAITING_FOR_RPC_REPLY, NULL, timeout_status ); } /*PAGE * * _MPCI_Create_server * * This subprogram creates the MPCI receive server. */ char *_MPCI_Internal_name = "MPCI"; void _MPCI_Create_server( void ) { if ( !_System_state_Is_multiprocessing ) return; /* * Initialize the MPCI Receive Server */ _MPCI_Receive_server_tcb = _Thread_Internal_allocate(); _Thread_Initialize( &_Thread_Internal_information, _MPCI_Receive_server_tcb, NULL, /* allocate the stack */ MPCI_RECEIVE_SERVER_STACK_SIZE, CPU_ALL_TASKS_ARE_FP, PRIORITY_MINIMUM, FALSE, /* no preempt */ THREAD_CPU_BUDGET_ALGORITHM_NONE, NULL, /* no budget algorithm callout */ 0, /* all interrupts enabled */ _MPCI_Internal_name ); _Thread_Start( _MPCI_Receive_server_tcb, THREAD_START_NUMERIC, (void *) _MPCI_Receive_server, NULL, 0 ); } /*PAGE * * _MPCI_Initialization * * This subprogram initializes the MPCI driver by * invoking the user provided MPCI initialization callout. */ void _MPCI_Initialization ( void ) { (*_MPCI_table->initialization)(); } /*PAGE * * _MPCI_Register_packet_processor * * This routine registers the MPCI packet processor for the * designated object class. */ void _MPCI_Register_packet_processor( MP_packet_Classes the_class, MPCI_Packet_processor the_packet_processor ) { _MPCI_Packet_processors[ the_class ] = the_packet_processor; } /*PAGE * * _MPCI_Get_packet * * This subprogram obtains a packet by invoking the user provided * MPCI get packet callout. */ MP_packet_Prefix *_MPCI_Get_packet ( void ) { MP_packet_Prefix *the_packet; (*_MPCI_table->get_packet)( &the_packet ); if ( the_packet == NULL ) _Internal_error_Occurred( INTERNAL_ERROR_CORE, TRUE, INTERNAL_ERROR_OUT_OF_PACKETS ); /* * Put in a default timeout that will be used for * all packets that do not otherwise have a timeout. */ the_packet->timeout = MPCI_DEFAULT_TIMEOUT; return the_packet; } /*PAGE * * _MPCI_Return_packet * * This subprogram returns a packet by invoking the user provided * MPCI return packet callout. */ void _MPCI_Return_packet ( MP_packet_Prefix *the_packet ) { (*_MPCI_table->return_packet)( the_packet ); } /*PAGE * * _MPCI_Send_process_packet * * This subprogram sends a process packet by invoking the user provided * MPCI send callout. */ void _MPCI_Send_process_packet ( unsigned32 destination, MP_packet_Prefix *the_packet ) { the_packet->source_tid = _Thread_Executing->Object.id; the_packet->to_convert = ( the_packet->to_convert - sizeof(MP_packet_Prefix) ) / sizeof(unsigned32); (*_MPCI_table->send_packet)( destination, the_packet ); } /*PAGE * * _MPCI_Send_request_packet * * This subprogram sends a request packet by invoking the user provided * MPCI send callout. */ unsigned32 _MPCI_Send_request_packet ( unsigned32 destination, MP_packet_Prefix *the_packet, States_Control extra_state ) { the_packet->source_tid = _Thread_Executing->Object.id; the_packet->source_priority = _Thread_Executing->current_priority; the_packet->to_convert = ( the_packet->to_convert - sizeof(MP_packet_Prefix) ) / sizeof(unsigned32); _Thread_Executing->Wait.id = the_packet->id; _Thread_Executing->Wait.queue = &_MPCI_Remote_blocked_threads; _Thread_Disable_dispatch(); (*_MPCI_table->send_packet)( destination, the_packet ); _Thread_queue_Enter_critical_section( &_MPCI_Remote_blocked_threads ); /* * See if we need a default timeout */ if (the_packet->timeout == MPCI_DEFAULT_TIMEOUT) the_packet->timeout = _MPCI_table->default_timeout; _Thread_queue_Enqueue( &_MPCI_Remote_blocked_threads, the_packet->timeout ); _Thread_Executing->current_state = _States_Set( extra_state, _Thread_Executing->current_state ); _Thread_Enable_dispatch(); return _Thread_Executing->Wait.return_code; } /*PAGE * * _MPCI_Send_response_packet * * This subprogram sends a response packet by invoking the user provided * MPCI send callout. */ void _MPCI_Send_response_packet ( unsigned32 destination, MP_packet_Prefix *the_packet ) { the_packet->source_tid = _Thread_Executing->Object.id; (*_MPCI_table->send_packet)( destination, the_packet ); } /*PAGE * * _MPCI_Receive_packet * * This subprogram receives a packet by invoking the user provided * MPCI receive callout. */ MP_packet_Prefix *_MPCI_Receive_packet ( void ) { MP_packet_Prefix *the_packet; (*_MPCI_table->receive_packet)( &the_packet ); return the_packet; } /*PAGE * * _MPCI_Process_response * * This subprogram obtains a packet by invoking the user provided * MPCI get packet callout. */ Thread_Control *_MPCI_Process_response ( MP_packet_Prefix *the_packet ) { Thread_Control *the_thread; Objects_Locations location; the_thread = _Thread_Get( the_packet->id, &location ); switch ( location ) { case OBJECTS_ERROR: case OBJECTS_REMOTE: the_thread = NULL; /* IMPOSSIBLE */ break; case OBJECTS_LOCAL: _Thread_queue_Extract( &_MPCI_Remote_blocked_threads, the_thread ); the_thread->Wait.return_code = the_packet->return_code; _Thread_Unnest_dispatch(); break; } return the_thread; } /*PAGE * * _MPCI_Receive_server * */ Thread _MPCI_Receive_server( unsigned32 ignored ) { MP_packet_Prefix *the_packet; MPCI_Packet_processor the_function; Thread_Control *executing; executing = _Thread_Executing; for ( ; ; ) { executing->receive_packet = NULL; _Thread_Disable_dispatch(); _CORE_semaphore_Seize( &_MPCI_Semaphore, 0, TRUE, WATCHDOG_NO_TIMEOUT ); _Thread_Enable_dispatch(); for ( ; ; ) { the_packet = _MPCI_Receive_packet(); if ( !the_packet ) break; executing->receive_packet = the_packet; if ( !_Mp_packet_Is_valid_packet_class ( the_packet->the_class ) ) break; the_function = _MPCI_Packet_processors[ the_packet->the_class ]; if ( !the_function ) _Internal_error_Occurred( INTERNAL_ERROR_CORE, TRUE, INTERNAL_ERROR_BAD_PACKET ); (*the_function)( the_packet ); } } } /*PAGE * * _MPCI_Announce * */ void _MPCI_Announce ( void ) { _Thread_Disable_dispatch(); (void) _CORE_semaphore_Surrender( &_MPCI_Semaphore, 0, 0 ); _Thread_Enable_dispatch(); } /*PAGE * * _MPCI_Internal_packets_Send_process_packet * */ void _MPCI_Internal_packets_Send_process_packet ( MPCI_Internal_Remote_operations operation ) { MPCI_Internal_packet *the_packet; switch ( operation ) { case MPCI_PACKETS_SYSTEM_VERIFY: the_packet = _MPCI_Internal_packets_Get_packet(); the_packet->Prefix.the_class = MP_PACKET_MPCI_INTERNAL; the_packet->Prefix.length = sizeof ( MPCI_Internal_packet ); the_packet->Prefix.to_convert = sizeof ( MPCI_Internal_packet ); the_packet->operation = operation; the_packet->maximum_nodes = _Objects_Maximum_nodes; the_packet->maximum_global_objects = _Objects_MP_Maximum_global_objects; _MPCI_Send_process_packet( MPCI_ALL_NODES, &the_packet->Prefix ); break; } } /*PAGE * * _MPCI_Internal_packets_Send_request_packet * * This subprogram is not needed since there are no request * packets to be sent by this manager. * */ /*PAGE * * _MPCI_Internal_packets_Send_response_packet * * This subprogram is not needed since there are no response * packets to be sent by this manager. * */ /*PAGE * * * _MPCI_Internal_packets_Process_packet * */ void _MPCI_Internal_packets_Process_packet ( MP_packet_Prefix *the_packet_prefix ) { MPCI_Internal_packet *the_packet; unsigned32 maximum_nodes; unsigned32 maximum_global_objects; the_packet = (MPCI_Internal_packet *) the_packet_prefix; switch ( the_packet->operation ) { case MPCI_PACKETS_SYSTEM_VERIFY: maximum_nodes = the_packet->maximum_nodes; maximum_global_objects = the_packet->maximum_global_objects; if ( maximum_nodes != _Objects_Maximum_nodes || maximum_global_objects != _Objects_MP_Maximum_global_objects ) { _MPCI_Return_packet( the_packet_prefix ); _Internal_error_Occurred( INTERNAL_ERROR_CORE, TRUE, INTERNAL_ERROR_INCONSISTENT_MP_INFORMATION ); } _MPCI_Return_packet( the_packet_prefix ); break; } } /*PAGE * * _MPCI_Internal_packets_Send_object_was_deleted * * This subprogram is not needed since there are no objects * deleted by this manager. * */ /*PAGE * * _MPCI_Internal_packets_Send_extract_proxy * * This subprogram is not needed since there are no objects * deleted by this manager. * */ /*PAGE * * _MPCI_Internal_packets_Get_packet * */ MPCI_Internal_packet *_MPCI_Internal_packets_Get_packet ( void ) { return ( (MPCI_Internal_packet *) _MPCI_Get_packet() ); } /* end of file */
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