[a91dc98b] | 1 | /* |
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| 2 | * Copyright (c) 2013 embedded brains GmbH. All rights reserved. |
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| 3 | * |
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| 4 | * embedded brains GmbH |
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| 5 | * Dornierstr. 4 |
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| 6 | * 82178 Puchheim |
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| 7 | * Germany |
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| 8 | * <info@embedded-brains.de> |
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| 9 | * |
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| 10 | * The license and distribution terms for this file may be |
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| 11 | * found in the file LICENSE in this distribution or at |
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| 12 | * http://www.rtems.com/license/LICENSE. |
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| 13 | */ |
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| 14 | |
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| 15 | #ifndef LIBBSP_ARM_SHARED_ARM_GIC_H |
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| 16 | #define LIBBSP_ARM_SHARED_ARM_GIC_H |
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| 17 | |
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| 18 | #include <bsp/arm-gic-regs.h> |
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| 19 | |
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| 20 | #include <stdbool.h> |
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| 21 | |
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| 22 | #ifdef __cplusplus |
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| 23 | extern "C" { |
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| 24 | #endif /* __cplusplus */ |
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| 25 | |
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| 26 | #define GIC_ID_TO_ONE_BIT_REG_INDEX(id) ((id) >> 5) |
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| 27 | #define GIC_ID_TO_ONE_BIT_REG_BIT(id) (1U << ((id) & 0x1fU)) |
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| 28 | |
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| 29 | #define GIC_ID_TO_TWO_BITS_REG_INDEX(id) ((id) >> 4) |
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| 30 | #define GIC_ID_TO_TWO_BITS_REG_OFFSET(id) ((id) & 0xfU) |
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| 31 | |
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| 32 | static inline bool gic_id_is_enabled(volatile gic_dist *dist, uint32_t id) |
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| 33 | { |
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| 34 | uint32_t i = GIC_ID_TO_ONE_BIT_REG_INDEX(id); |
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| 35 | uint32_t bit = GIC_ID_TO_ONE_BIT_REG_BIT(id); |
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| 36 | |
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| 37 | return (dist->icdiser[i] & bit) != 0; |
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| 38 | } |
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| 39 | |
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| 40 | static inline void gic_id_enable(volatile gic_dist *dist, uint32_t id) |
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| 41 | { |
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| 42 | uint32_t i = GIC_ID_TO_ONE_BIT_REG_INDEX(id); |
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| 43 | uint32_t bit = GIC_ID_TO_ONE_BIT_REG_BIT(id); |
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| 44 | |
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| 45 | dist->icdiser[i] = bit; |
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| 46 | } |
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| 47 | |
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| 48 | static inline void gic_id_disable(volatile gic_dist *dist, uint32_t id) |
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| 49 | { |
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| 50 | uint32_t i = GIC_ID_TO_ONE_BIT_REG_INDEX(id); |
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| 51 | uint32_t bit = GIC_ID_TO_ONE_BIT_REG_BIT(id); |
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| 52 | |
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| 53 | dist->icdicer[i] = bit; |
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| 54 | } |
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| 55 | |
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| 56 | static inline bool gic_id_is_pending(volatile gic_dist *dist, uint32_t id) |
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| 57 | { |
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| 58 | uint32_t i = GIC_ID_TO_ONE_BIT_REG_INDEX(id); |
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| 59 | uint32_t bit = GIC_ID_TO_ONE_BIT_REG_BIT(id); |
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| 60 | |
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| 61 | return (dist->icdispr[i] & bit) != 0; |
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| 62 | } |
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| 63 | |
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| 64 | static inline void gic_id_set_pending(volatile gic_dist *dist, uint32_t id) |
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| 65 | { |
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| 66 | uint32_t i = GIC_ID_TO_ONE_BIT_REG_INDEX(id); |
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| 67 | uint32_t bit = GIC_ID_TO_ONE_BIT_REG_BIT(id); |
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| 68 | |
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| 69 | dist->icdispr[i] = bit; |
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| 70 | } |
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| 71 | |
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| 72 | static inline void gic_id_clear_pending(volatile gic_dist *dist, uint32_t id) |
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| 73 | { |
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| 74 | uint32_t i = GIC_ID_TO_ONE_BIT_REG_INDEX(id); |
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| 75 | uint32_t bit = GIC_ID_TO_ONE_BIT_REG_BIT(id); |
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| 76 | |
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| 77 | dist->icdicpr[i] = bit; |
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| 78 | } |
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| 79 | |
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| 80 | static inline bool gic_id_is_active(volatile gic_dist *dist, uint32_t id) |
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| 81 | { |
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| 82 | uint32_t i = GIC_ID_TO_ONE_BIT_REG_INDEX(id); |
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| 83 | uint32_t bit = GIC_ID_TO_ONE_BIT_REG_BIT(id); |
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| 84 | |
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| 85 | return (dist->icdabr[i] & bit) != 0; |
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| 86 | } |
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| 87 | |
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| 88 | static inline void gic_id_set_priority( |
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| 89 | volatile gic_dist *dist, |
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| 90 | uint32_t id, |
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| 91 | uint8_t priority |
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| 92 | ) |
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| 93 | { |
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| 94 | dist->icdipr[id] = priority; |
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| 95 | } |
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| 96 | |
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| 97 | static inline uint8_t gic_id_get_priority(volatile gic_dist *dist, uint32_t id) |
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| 98 | { |
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| 99 | return dist->icdipr[id]; |
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| 100 | } |
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| 101 | |
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| 102 | static inline void gic_id_set_targets( |
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| 103 | volatile gic_dist *dist, |
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| 104 | uint32_t id, |
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| 105 | uint8_t targets |
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| 106 | ) |
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| 107 | { |
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| 108 | dist->icdiptr[id] = targets; |
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| 109 | } |
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| 110 | |
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| 111 | static inline uint8_t gic_id_get_targets(volatile gic_dist *dist, uint32_t id) |
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| 112 | { |
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| 113 | return dist->icdiptr[id]; |
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| 114 | } |
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| 115 | |
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| 116 | typedef enum { |
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| 117 | GIC_LEVEL_SENSITIVE, |
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| 118 | GIC_EDGE_TRIGGERED |
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| 119 | } gic_trigger_mode; |
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| 120 | |
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| 121 | static inline gic_trigger_mode gic_id_get_trigger_mode( |
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| 122 | volatile gic_dist *dist, |
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| 123 | uint32_t id |
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| 124 | ) |
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| 125 | { |
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| 126 | uint32_t i = GIC_ID_TO_TWO_BITS_REG_INDEX(id); |
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| 127 | uint32_t o = GIC_ID_TO_TWO_BITS_REG_OFFSET(id) + 1; |
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| 128 | uint32_t bit = 1U << o; |
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| 129 | |
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| 130 | return dist->icdicfr[i] & bit; |
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| 131 | } |
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| 132 | |
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| 133 | static inline void gic_id_set_trigger_mode( |
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| 134 | volatile gic_dist *dist, |
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| 135 | uint32_t id, |
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| 136 | gic_trigger_mode mode |
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| 137 | ) |
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| 138 | { |
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| 139 | uint32_t i = GIC_ID_TO_TWO_BITS_REG_INDEX(id); |
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| 140 | uint32_t o = GIC_ID_TO_TWO_BITS_REG_OFFSET(id) + 1; |
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| 141 | uint32_t bit = mode << o; |
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| 142 | uint32_t mask = 1U << o; |
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| 143 | uint32_t icdicfr = dist->icdicfr[i]; |
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| 144 | |
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| 145 | icdicfr &= ~mask; |
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| 146 | icdicfr |= bit; |
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| 147 | |
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| 148 | dist->icdicfr[i] = icdicfr; |
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| 149 | } |
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| 150 | |
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| 151 | typedef enum { |
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| 152 | GIC_N_TO_N, |
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| 153 | GIC_1_TO_N |
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| 154 | } gic_handling_model; |
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| 155 | |
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| 156 | static inline gic_handling_model gic_id_get_handling_model( |
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| 157 | volatile gic_dist *dist, |
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| 158 | uint32_t id |
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| 159 | ) |
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| 160 | { |
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| 161 | uint32_t i = GIC_ID_TO_TWO_BITS_REG_INDEX(id); |
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| 162 | uint32_t o = GIC_ID_TO_TWO_BITS_REG_OFFSET(id); |
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| 163 | uint32_t bit = 1U << o; |
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| 164 | |
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| 165 | return dist->icdicfr[i] & bit; |
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| 166 | } |
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| 167 | |
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| 168 | static inline void gic_id_set_handling_model( |
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| 169 | volatile gic_dist *dist, |
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| 170 | uint32_t id, |
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| 171 | gic_handling_model model |
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| 172 | ) |
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| 173 | { |
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| 174 | uint32_t i = GIC_ID_TO_TWO_BITS_REG_INDEX(id); |
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| 175 | uint32_t o = GIC_ID_TO_TWO_BITS_REG_OFFSET(id); |
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| 176 | uint32_t bit = model << o; |
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| 177 | uint32_t mask = 1U << o; |
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| 178 | uint32_t icdicfr = dist->icdicfr[i]; |
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| 179 | |
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| 180 | icdicfr &= ~mask; |
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| 181 | icdicfr |= bit; |
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| 182 | |
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| 183 | dist->icdicfr[i] = icdicfr; |
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| 184 | } |
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| 185 | |
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| 186 | #ifdef __cplusplus |
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| 187 | } |
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| 188 | #endif /* __cplusplus */ |
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| 189 | |
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| 190 | #endif /* LIBBSP_ARM_SHARED_ARM_GIC_H */ |
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