source: rtems/cpukit/score/include/rtems/score/processormask.h @ a38d1fe4

5
Last change on this file since a38d1fe4 was a38d1fe4, checked in by Sebastian Huber <sebastian.huber@…>, on Feb 17, 2016 at 2:25:10 PM

score: Add Processor_mask, etc.

  • Property mode set to 100644
File size: 2.1 KB
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1/**
2 * @file
3 *
4 * @brief Processor Mask API
5 *
6 * @ingroup ScoreProcessorMask
7 */
8
9/*
10 * Copyright (c) 2016 embedded brains GmbH.  All rights reserved.
11 *
12 *  embedded brains GmbH
13 *  Dornierstr. 4
14 *  82178 Puchheim
15 *  Germany
16 *  <rtems@embedded-brains.de>
17 *
18 * The license and distribution terms for this file may be
19 * found in the file LICENSE in this distribution or at
20 * http://www.rtems.org/license/LICENSE.
21 */
22
23#ifndef _RTEMS_SCORE_PROCESSORMASK_H
24#define _RTEMS_SCORE_PROCESSORMASK_H
25
26#include <rtems/score/cpu.h>
27
28#ifdef __cplusplus
29extern "C" {
30#endif /* __cplusplus */
31
32/**
33 * @defgroup ScoreProcessorMask Processor Mask
34 *
35 * @ingroup Score
36 *
37 * The processor mask provides a bit map large enough to provide one bit for
38 * each processor in the system.  It is a fixed size internal data type
39 * provided for efficiency in addition to the API level cpu_set_t.
40 *
41 * @{
42 */
43
44#define PROCESSOR_MASK_BITS_PER_FIELD 32
45
46#define PROCESSOR_MASK_FIELD_COUNT \
47  ( ( CPU_MAXIMUM_PROCESSORS + PROCESSOR_MASK_BITS_PER_FIELD - 1 ) \
48    / PROCESSOR_MASK_BITS_PER_FIELD )
49
50#define PROCESSOR_MASK_BIT( index ) \
51  (1UL << ( ( index ) % PROCESSOR_MASK_BITS_PER_FIELD ) )
52
53#define PROCESSOR_MASK_FIELD( index ) \
54  ( ( index ) / PROCESSOR_MASK_BITS_PER_FIELD )
55
56/**
57 * @brief A bit map consisting of 32-bit integer fields which is large enough
58 * to provide one bit for each processor in the system.
59 *
60 * Processor 0 corresponds to the bit 0 (least-significant) of the field 0 in
61 * the array, and so on.
62 */
63typedef uint32_t Processor_mask[ PROCESSOR_MASK_FIELD_COUNT ];
64
65RTEMS_INLINE_ROUTINE void _Processor_mask_Set( Processor_mask mask, uint32_t index )
66{
67  mask[ PROCESSOR_MASK_FIELD( index ) ] |= PROCESSOR_MASK_BIT( index );
68}
69
70RTEMS_INLINE_ROUTINE void _Processor_mask_Clear( Processor_mask mask, uint32_t index )
71{
72  mask[ PROCESSOR_MASK_FIELD( index ) ] &= ~PROCESSOR_MASK_BIT( index );
73}
74
75RTEMS_INLINE_ROUTINE bool _Processor_mask_Is_set(
76  const Processor_mask mask,
77  uint32_t index
78)
79{
80  return ( mask[ PROCESSOR_MASK_FIELD( index ) ]
81    & PROCESSOR_MASK_BIT( index ) ) != 0;
82}
83
84/** @} */
85
86#ifdef __cplusplus
87}
88#endif /* __cplusplus */
89
90#endif /* _RTEMS_SCORE_PROCESSORMASK_H */
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