rtems/score/smp.h

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup RTEMSScoreSMP
0007  *
0008  * @brief This header file provides interfaces of the
0009  *   @ref RTEMSScoreSMP which are used by the implementation and the
0010  *   @ref RTEMSImplApplConfig.
0011  */
0012
0013 /*
0014  *  COPYRIGHT (c) 1989-2011.
0015  *  On-Line Applications Research Corporation (OAR).
0016  *
0017  * Redistribution and use in source and binary forms, with or without
0018  * modification, are permitted provided that the following conditions
0019  * are met:
0020  * 1. Redistributions of source code must retain the above copyright
0021  *    notice, this list of conditions and the following disclaimer.
0022  * 2. Redistributions in binary form must reproduce the above copyright
0023  *    notice, this list of conditions and the following disclaimer in the
0024  *    documentation and/or other materials provided with the distribution.
0025  *
0026  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0027  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0028  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0029  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0030  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0031  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0032  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0033  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0034  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0035  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0036  * POSSIBILITY OF SUCH DAMAGE.
0037  */
0038
0039 #ifndef _RTEMS_SCORE_SMP_H
0040 #define _RTEMS_SCORE_SMP_H
0041
0042 #include <rtems/score/cpu.h>
0043
0044 #ifdef __cplusplus
0045 extern "C" {
0046 #endif
0047
0048 /**
0049  * @defgroup RTEMSScoreSMP SMP Support
0050  *
0051  * @ingroup RTEMSScore
0052  *
0053  * @brief This group contains the implementation to support SMP systems.
0054  *
0055  * @{
0056  */
0057
0058 /**
0059  * @brief The configured processor maximum.
0060  *
0061  * In SMP configurations, this constant is defined by the application
0062  * configuration via <rtems/confdefs.h>, otherwise it is a compile-time
0063  * constant with the value one.
0064  */
0065 #if defined(RTEMS_SMP)
0066   extern const uint32_t _SMP_Processor_configured_maximum;
0067 #else
0068   #define _SMP_Processor_configured_maximum 1
0069 #endif
0070
0071 #if defined( RTEMS_SMP )
0072   extern uint32_t _SMP_Processor_maximum;
0073
0074   static inline uint32_t _SMP_Get_processor_maximum( void )
0075   {
0076     return _SMP_Processor_maximum;
0077   }
0078 #else
0079   #define _SMP_Get_processor_maximum() UINT32_C(1)
0080 #endif
0081
0082 #if defined( RTEMS_SMP )
0083   static inline uint32_t _SMP_Get_current_processor( void )
0084   {
0085     return _CPU_SMP_Get_current_processor();
0086   }
0087 #else
0088   #define _SMP_Get_current_processor() UINT32_C(0)
0089 #endif
0090
0091 /** @} */
0092
0093 #ifdef __cplusplus
0094 }
0095 #endif
0096
0097 #endif
0098 /* end of include file */