score/src/smpmulticastaction.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup RTEMSScoreSMP
0007  *
0008  * @brief This source file contains the implementation of
0009  *   _SMP_Multicast_action().
0010  */
0011
0012 /*
0013  * Copyright (C) 2019 embedded brains GmbH & Co. KG
0014  *
0015  * Redistribution and use in source and binary forms, with or without
0016  * modification, are permitted provided that the following conditions
0017  * are met:
0018  * 1. Redistributions of source code must retain the above copyright
0019  *    notice, this list of conditions and the following disclaimer.
0020  * 2. Redistributions in binary form must reproduce the above copyright
0021  *    notice, this list of conditions and the following disclaimer in the
0022  *    documentation and/or other materials provided with the distribution.
0023  *
0024  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0025  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0026  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0027  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0028  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0029  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0030  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0031  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0032  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0033  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0034  * POSSIBILITY OF SUCH DAMAGE.
0035  */
0036
0037 #ifdef HAVE_CONFIG_H
0038 #include "config.h"
0039 #endif
0040
0041 #include <rtems/score/smpimpl.h>
0042 #include <rtems/score/assert.h>
0043
0044 typedef struct {
0045   Per_CPU_Job_context Context;
0046   Per_CPU_Job         Jobs[ CPU_MAXIMUM_PROCESSORS ];
0047 } SMP_Multicast_jobs;
0048
0049 static void _SMP_Issue_action_jobs(
0050   const Processor_mask *targets,
0051   SMP_Multicast_jobs   *jobs,
0052   uint32_t              cpu_max
0053 )
0054 {
0055   uint32_t cpu_index;
0056
0057   for ( cpu_index = 0; cpu_index < cpu_max; ++cpu_index ) {
0058     if ( _Processor_mask_Is_set( targets, cpu_index ) ) {
0059       Per_CPU_Job     *job;
0060       Per_CPU_Control *cpu;
0061
0062       job = &jobs->Jobs[ cpu_index ];
0063       job->context = &jobs->Context;
0064       cpu = _Per_CPU_Get_by_index( cpu_index );
0065
0066       _Per_CPU_Submit_job( cpu, job );
0067     }
0068   }
0069 }
0070
0071 static void _SMP_Wait_for_action_jobs(
0072   const Processor_mask     *targets,
0073   const SMP_Multicast_jobs *jobs,
0074   uint32_t                  cpu_max
0075 )
0076 {
0077   uint32_t cpu_index;
0078
0079   for ( cpu_index = 0; cpu_index < cpu_max; ++cpu_index ) {
0080     if ( _Processor_mask_Is_set( targets, cpu_index ) ) {
0081       const Per_CPU_Control *cpu;
0082       const Per_CPU_Job     *job;
0083
0084       cpu = _Per_CPU_Get_by_index( cpu_index );
0085       job = &jobs->Jobs[ cpu_index ];
0086       _Per_CPU_Wait_for_job( cpu, job );
0087     }
0088   }
0089 }
0090
0091 void _SMP_Multicast_action(
0092   const Processor_mask *targets,
0093   SMP_Action_handler    handler,
0094   void                 *arg
0095 )
0096 {
0097   SMP_Multicast_jobs jobs;
0098   uint32_t           cpu_max;
0099
0100   cpu_max = _SMP_Get_processor_maximum();
0101   _Assert( cpu_max <= RTEMS_ARRAY_SIZE( jobs.Jobs ) );
0102
0103   jobs.Context.handler = handler;
0104   jobs.Context.arg = arg;
0105
0106   _SMP_Issue_action_jobs( targets, &jobs, cpu_max );
0107   _SMP_Wait_for_action_jobs( targets, &jobs, cpu_max );
0108 }