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/**
* @file
*
* @ingroup ScoreCpuset
*
* @brief Routines to Control a CPU Set.
*/
/*
* COPYRIGHT (c) 2014.
* 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.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef __RTEMS_HAVE_SYS_CPUSET_H__
#include <sys/cpuset.h>
#include <rtems/sysinit.h>
#include <rtems/score/cpusetimpl.h>
#include <rtems/score/assert.h>
#include <rtems/score/percpu.h>
static CPU_set_Control cpuset_default;
/*
* _CPU_set_Handler_initialization
*/
static void _CPU_set_Handler_initialization()
{
uint32_t cpu_count;
uint32_t cpu_index;
/* We do not support a cpu count over CPU_SETSIZE */
cpu_count = _SMP_Get_processor_count();
/* This should never happen */
_Assert( cpu_count <= CPU_SETSIZE );
/* Initialize the affinity to be the set of all available CPU's */
cpuset_default.set = &cpuset_default.preallocated;
cpuset_default.setsize = sizeof( *cpuset_default.set );
CPU_ZERO_S( cpuset_default.setsize, &cpuset_default.preallocated );
for ( cpu_index=0; cpu_index<cpu_count; cpu_index++ )
CPU_SET_S( (int) cpu_index, cpuset_default.setsize, cpuset_default.set );
}
RTEMS_SYSINIT_ITEM(
_CPU_set_Handler_initialization,
RTEMS_SYSINIT_CPU_SET,
RTEMS_SYSINIT_ORDER_MIDDLE
);
/**
* _CPU_set_Is_valid
*
* This routine validates a cpuset size corresponds to
* the system correct size, that at least one
* valid cpu is set and that no invalid cpus are set.
*/
bool _CPU_set_Is_valid( const cpu_set_t *cpuset, size_t setsize )
{
cpu_set_t temp;
if ( !cpuset )
return false;
if ( setsize != cpuset_default.setsize )
return false;
/* Validate at least 1 valid cpu is set in cpuset */
CPU_AND_S( cpuset_default.setsize, &temp, cpuset, cpuset_default.set );
if ( CPU_COUNT_S( setsize, &temp ) == 0 )
return false;
/* Validate that no invalid cpu's are set in cpuset */
if ( !CPU_EQUAL_S( setsize, &temp, cpuset ) )
return false;
return true;
}
/**
* _CPU_set_Default
*
* This routine returns the default cpuset.
*/
const CPU_set_Control *_CPU_set_Default()
{
return &cpuset_default;
}
#endif
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