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/**
* @file
*
* @brief Processor Mask API
*
* @ingroup ScoreProcessorMask
*/
/*
* Copyright (c) 2016 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Dornierstr. 4
* 82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* 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_PROCESSORMASK_H
#define _RTEMS_SCORE_PROCESSORMASK_H
#include <rtems/score/cpu.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/**
* @defgroup ScoreProcessorMask Processor Mask
*
* @ingroup Score
*
* The processor mask provides a bit map large enough to provide one bit for
* each processor in the system. It is a fixed size internal data type
* provided for efficiency in addition to the API level cpu_set_t.
*
* @{
*/
#define PROCESSOR_MASK_BITS_PER_FIELD 32
#define PROCESSOR_MASK_FIELD_COUNT \
( ( CPU_MAXIMUM_PROCESSORS + PROCESSOR_MASK_BITS_PER_FIELD - 1 ) \
/ PROCESSOR_MASK_BITS_PER_FIELD )
#define PROCESSOR_MASK_BIT( index ) \
(1UL << ( ( index ) % PROCESSOR_MASK_BITS_PER_FIELD ) )
#define PROCESSOR_MASK_FIELD( index ) \
( ( index ) / PROCESSOR_MASK_BITS_PER_FIELD )
/**
* @brief A bit map consisting of 32-bit integer fields which is large enough
* to provide one bit for each processor in the system.
*
* Processor 0 corresponds to the bit 0 (least-significant) of the field 0 in
* the array, and so on.
*/
typedef uint32_t Processor_mask[ PROCESSOR_MASK_FIELD_COUNT ];
RTEMS_INLINE_ROUTINE void _Processor_mask_Set( Processor_mask mask, uint32_t index )
{
mask[ PROCESSOR_MASK_FIELD( index ) ] |= PROCESSOR_MASK_BIT( index );
}
RTEMS_INLINE_ROUTINE void _Processor_mask_Clear( Processor_mask mask, uint32_t index )
{
mask[ PROCESSOR_MASK_FIELD( index ) ] &= ~PROCESSOR_MASK_BIT( index );
}
RTEMS_INLINE_ROUTINE bool _Processor_mask_Is_set(
const Processor_mask mask,
uint32_t index
)
{
return ( mask[ PROCESSOR_MASK_FIELD( index ) ]
& PROCESSOR_MASK_BIT( index ) ) != 0;
}
/** @} */
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* _RTEMS_SCORE_PROCESSORMASK_H */
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