path: root/cpukit/include/rtems/score/smp.h

/**
 * @file
 *
 * @ingroup RTEMSScoreSMP
 *
 * @brief This header file provides interfaces of the
 *   @ref RTEMSScoreSMP which are used by the implementation and the
 *   @ref RTEMSImplApplConfig.
 */

/*
 *  COPYRIGHT (c) 1989-2011.
 *  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.
 */

#ifndef _RTEMS_SCORE_SMP_H
#define _RTEMS_SCORE_SMP_H

#include <rtems/score/cpu.h>

#ifdef __cplusplus
extern "C" {
#endif

/**
 * @defgroup RTEMSScoreSMP SMP Support
 *
 * @ingroup RTEMSScore
 *
 * @brief This group contains the implementation to support SMP systems.
 *
 * @{
 */

/**
 * @brief The configured processor maximum.
 *
 * In SMP configurations, this constant is defined by the application
 * configuration via <rtems/confdefs.h>, otherwise it is a compile-time
 * constant with the value one.
 */
#if defined(RTEMS_SMP)
  extern const uint32_t _SMP_Processor_configured_maximum;
#else
  #define _SMP_Processor_configured_maximum 1
#endif

#if defined( RTEMS_SMP )
  extern uint32_t _SMP_Processor_maximum;

  static inline uint32_t _SMP_Get_processor_maximum( void )
  {
    return _SMP_Processor_maximum;
  }
#else
  #define _SMP_Get_processor_maximum() UINT32_C(1)
#endif

#if defined( RTEMS_SMP )
  static inline uint32_t _SMP_Get_current_processor( void )
  {
    return _CPU_SMP_Get_current_processor();
  }
#else
  #define _SMP_Get_current_processor() UINT32_C(0)
#endif

/** @} */

#ifdef __cplusplus
}
#endif

#endif
/* end of include file */