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/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup RTEMSScoreSMP
*
* @brief This source file contains the implementation of
* _SMP_Broadcast_action(), _SMP_Multicast_action(), _SMP_Othercast_action(),
* and _SMP_Synchronize().
*/
/*
* Copyright (C) 2019 embedded brains GmbH
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/score/smpimpl.h>
#include <rtems/score/assert.h>
typedef struct {
Per_CPU_Job_context Context;
Per_CPU_Job Jobs[ CPU_MAXIMUM_PROCESSORS ];
} SMP_Multicast_jobs;
static void _SMP_Issue_action_jobs(
const Processor_mask *targets,
SMP_Multicast_jobs *jobs,
uint32_t cpu_max
)
{
uint32_t cpu_index;
for ( cpu_index = 0; cpu_index < cpu_max; ++cpu_index ) {
if ( _Processor_mask_Is_set( targets, cpu_index ) ) {
Per_CPU_Job *job;
Per_CPU_Control *cpu;
job = &jobs->Jobs[ cpu_index ];
job->context = &jobs->Context;
cpu = _Per_CPU_Get_by_index( cpu_index );
_Per_CPU_Add_job( cpu, job );
_SMP_Send_message( cpu_index, SMP_MESSAGE_PERFORM_JOBS );
}
}
}
static void _SMP_Wait_for_action_jobs(
const Processor_mask *targets,
const SMP_Multicast_jobs *jobs,
uint32_t cpu_max
)
{
uint32_t cpu_index;
for ( cpu_index = 0; cpu_index < cpu_max; ++cpu_index ) {
if ( _Processor_mask_Is_set( targets, cpu_index ) ) {
const Per_CPU_Control *cpu;
const Per_CPU_Job *job;
cpu = _Per_CPU_Get_by_index( cpu_index );
job = &jobs->Jobs[ cpu_index ];
_Per_CPU_Wait_for_job( cpu, job );
}
}
}
void _SMP_Multicast_action(
const Processor_mask *targets,
SMP_Action_handler handler,
void *arg
)
{
SMP_Multicast_jobs jobs;
uint32_t cpu_max;
cpu_max = _SMP_Get_processor_maximum();
_Assert( cpu_max <= RTEMS_ARRAY_SIZE( jobs.Jobs ) );
jobs.Context.handler = handler;
jobs.Context.arg = arg;
_SMP_Issue_action_jobs( targets, &jobs, cpu_max );
_SMP_Wait_for_action_jobs( targets, &jobs, cpu_max );
}
void _SMP_Broadcast_action(
SMP_Action_handler handler,
void *arg
)
{
_SMP_Multicast_action( _SMP_Get_online_processors(), handler, arg );
}
void _SMP_Othercast_action(
SMP_Action_handler handler,
void *arg
)
{
Processor_mask targets;
_Processor_mask_Assign( &targets, _SMP_Get_online_processors() );
_Processor_mask_Clear( &targets, _SMP_Get_current_processor() );
_SMP_Multicast_action( &targets, handler, arg );
}
static void _SMP_Do_nothing_action( void *arg )
{
/* Do nothing */
}
void _SMP_Synchronize( void )
{
_SMP_Othercast_action( _SMP_Do_nothing_action, NULL );
}
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