smpimpl.h

Go to the documentation of this file.

/* SPDX-License-Identifier: BSD-2-Clause */
 
/*
 *  COPYRIGHT (c) 1989-2011.
 *  On-Line Applications Research Corporation (OAR).
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
 
#ifndef _RTEMS_SCORE_SMPIMPL_H
#define _RTEMS_SCORE_SMPIMPL_H
 
#include <rtems/score/smp.h>
#include <rtems/score/percpu.h>
#include <rtems/score/processormask.h>
#include <rtems/fatal.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
#define SMP_MESSAGE_SHUTDOWN 0x1UL
 
#define SMP_MESSAGE_PERFORM_JOBS 0x2UL
 
#define SMP_MESSAGE_FORCE_PROCESSING 0x4UL
 
typedef enum {
  SMP_FATAL_BOOT_PROCESSOR_NOT_ASSIGNED_TO_SCHEDULER,
  SMP_FATAL_MANDATORY_PROCESSOR_NOT_PRESENT,
  SMP_FATAL_MULTITASKING_START_ON_INVALID_PROCESSOR,
  SMP_FATAL_MULTITASKING_START_ON_UNASSIGNED_PROCESSOR,
  SMP_FATAL_SHUTDOWN,
  SMP_FATAL_SHUTDOWN_RESPONSE,
  SMP_FATAL_START_OF_MANDATORY_PROCESSOR_FAILED,
  SMP_FATAL_SCHEDULER_PIN_OR_UNPIN_NOT_SUPPORTED,
  SMP_FATAL_WRONG_CPU_STATE_TO_PERFORM_JOBS,
  SMP_FATAL_SCHEDULER_REQUIRES_EXACTLY_ONE_PROCESSOR,
  SMP_FATAL_MULTITASKING_START_ON_NOT_ONLINE_PROCESSOR
} SMP_Fatal_code;
 
static inline void _SMP_Fatal( SMP_Fatal_code code )
{
  _Terminate( RTEMS_FATAL_SOURCE_SMP, code );
}
 
#if defined( RTEMS_SMP )
  void _SMP_Handler_initialize( void );
#else
  #define _SMP_Handler_initialize() \
    do { } while ( 0 )
#endif
 
#if defined( RTEMS_SMP )
 
extern Processor_mask _SMP_Online_processors;
 
RTEMS_NO_RETURN void _SMP_Start_multitasking_on_secondary_processor(
  Per_CPU_Control *cpu_self
);
 
void _SMP_Process_message( Per_CPU_Control *cpu_self, long unsigned message );
 
void _SMP_Try_to_process_message(
  Per_CPU_Control *cpu_self,
  unsigned long    message
);
 
static inline void _SMP_Inter_processor_interrupt_handler(
  Per_CPU_Control *cpu_self
)
{
  unsigned long message;
 
  /*
   * In the common case the inter-processor interrupt is issued to carry out a
   * thread dispatch.
   */
  cpu_self->dispatch_necessary = true;
 
  message = _Atomic_Exchange_ulong(
    &cpu_self->message,
    0,
    ATOMIC_ORDER_ACQUIRE
  );
 
  if ( RTEMS_PREDICT_FALSE( message != 0 ) ) {
    _SMP_Process_message( cpu_self, message );
  }
}
 
bool _SMP_Should_start_processor( uint32_t cpu_index );
 
void _SMP_Send_message( Per_CPU_Control *cpu, unsigned long message );
 
typedef void ( *SMP_Action_handler )( void *arg );
 
void _SMP_Multicast_action(
  const Processor_mask *targets,
  SMP_Action_handler    handler,
  void                 *arg
);
 
void _SMP_Broadcast_action(
  SMP_Action_handler  handler,
  void               *arg
);
 
void _SMP_Othercast_action(
  SMP_Action_handler  handler,
  void               *arg
);
 
void _SMP_Unicast_action(
  uint32_t            cpu_index,
  SMP_Action_handler  handler,
  void               *arg
);
 
void _SMP_Synchronize( void );
 
#endif /* defined( RTEMS_SMP ) */
 
#if defined( RTEMS_SMP )
  void _SMP_Request_start_multitasking( void );
#else
  #define _SMP_Request_start_multitasking() \
    do { } while ( 0 )
#endif
 
#if defined( RTEMS_SMP )
  void _SMP_Request_shutdown( void );
#else
  #define _SMP_Request_shutdown() \
    do { } while ( 0 )
#endif
 
static inline const Processor_mask *_SMP_Get_online_processors( void )
{
#if defined(RTEMS_SMP)
  return &_SMP_Online_processors;
#else
  return &_Processor_mask_The_one_and_only;
#endif
}
 
static inline bool _SMP_Need_inter_processor_interrupts( void )
{
  /*
   * Use the configured processor maximum instead of the actual to allow
   * testing on uni-processor systems.
   */
  return _SMP_Processor_configured_maximum > 1;
}
 
#ifdef __cplusplus
}
#endif
 
#endif
/* end of include file */