[a38d1fe4] | 1 | /** |
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| 2 | * @file |
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| 3 | * |
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| 4 | * @brief Processor Mask API |
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| 5 | * |
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| 6 | * @ingroup ScoreProcessorMask |
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| 7 | */ |
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| 8 | |
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| 9 | /* |
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| 10 | * Copyright (c) 2016 embedded brains GmbH. All rights reserved. |
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| 11 | * |
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| 12 | * embedded brains GmbH |
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| 13 | * Dornierstr. 4 |
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| 14 | * 82178 Puchheim |
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| 15 | * Germany |
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| 16 | * <rtems@embedded-brains.de> |
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| 17 | * |
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| 18 | * The license and distribution terms for this file may be |
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| 19 | * found in the file LICENSE in this distribution or at |
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| 20 | * http://www.rtems.org/license/LICENSE. |
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| 21 | */ |
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| 22 | |
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| 23 | #ifndef _RTEMS_SCORE_PROCESSORMASK_H |
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| 24 | #define _RTEMS_SCORE_PROCESSORMASK_H |
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| 25 | |
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| 26 | #include <rtems/score/cpu.h> |
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| 27 | |
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| 28 | #ifdef __cplusplus |
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| 29 | extern "C" { |
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| 30 | #endif /* __cplusplus */ |
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| 31 | |
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| 32 | /** |
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| 33 | * @defgroup ScoreProcessorMask Processor Mask |
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| 34 | * |
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| 35 | * @ingroup Score |
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| 36 | * |
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| 37 | * The processor mask provides a bit map large enough to provide one bit for |
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| 38 | * each processor in the system. It is a fixed size internal data type |
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| 39 | * provided for efficiency in addition to the API level cpu_set_t. |
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| 40 | * |
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| 41 | * @{ |
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| 42 | */ |
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| 43 | |
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| 44 | #define PROCESSOR_MASK_BITS_PER_FIELD 32 |
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| 45 | |
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| 46 | #define PROCESSOR_MASK_FIELD_COUNT \ |
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| 47 | ( ( CPU_MAXIMUM_PROCESSORS + PROCESSOR_MASK_BITS_PER_FIELD - 1 ) \ |
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| 48 | / PROCESSOR_MASK_BITS_PER_FIELD ) |
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| 49 | |
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| 50 | #define PROCESSOR_MASK_BIT( index ) \ |
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| 51 | (1UL << ( ( index ) % PROCESSOR_MASK_BITS_PER_FIELD ) ) |
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| 52 | |
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| 53 | #define PROCESSOR_MASK_FIELD( index ) \ |
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| 54 | ( ( index ) / PROCESSOR_MASK_BITS_PER_FIELD ) |
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| 55 | |
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| 56 | /** |
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| 57 | * @brief A bit map consisting of 32-bit integer fields which is large enough |
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| 58 | * to provide one bit for each processor in the system. |
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| 59 | * |
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| 60 | * Processor 0 corresponds to the bit 0 (least-significant) of the field 0 in |
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| 61 | * the array, and so on. |
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| 62 | */ |
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| 63 | typedef uint32_t Processor_mask[ PROCESSOR_MASK_FIELD_COUNT ]; |
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| 64 | |
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| 65 | RTEMS_INLINE_ROUTINE void _Processor_mask_Set( Processor_mask mask, uint32_t index ) |
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| 66 | { |
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| 67 | mask[ PROCESSOR_MASK_FIELD( index ) ] |= PROCESSOR_MASK_BIT( index ); |
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| 68 | } |
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| 69 | |
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| 70 | RTEMS_INLINE_ROUTINE void _Processor_mask_Clear( Processor_mask mask, uint32_t index ) |
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| 71 | { |
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| 72 | mask[ PROCESSOR_MASK_FIELD( index ) ] &= ~PROCESSOR_MASK_BIT( index ); |
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| 73 | } |
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| 74 | |
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| 75 | RTEMS_INLINE_ROUTINE bool _Processor_mask_Is_set( |
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| 76 | const Processor_mask mask, |
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| 77 | uint32_t index |
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| 78 | ) |
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| 79 | { |
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| 80 | return ( mask[ PROCESSOR_MASK_FIELD( index ) ] |
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| 81 | & PROCESSOR_MASK_BIT( index ) ) != 0; |
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| 82 | } |
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| 83 | |
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| 84 | /** @} */ |
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| 85 | |
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| 86 | #ifdef __cplusplus |
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| 87 | } |
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| 88 | #endif /* __cplusplus */ |
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| 89 | |
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| 90 | #endif /* _RTEMS_SCORE_PROCESSORMASK_H */ |
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