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) != 0 ? |
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131 | GIC_EDGE_TRIGGERED : GIC_LEVEL_SENSITIVE; |
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132 | } |
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133 | |
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134 | static inline void gic_id_set_trigger_mode( |
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135 | volatile gic_dist *dist, |
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136 | uint32_t id, |
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137 | gic_trigger_mode mode |
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138 | ) |
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139 | { |
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140 | uint32_t i = GIC_ID_TO_TWO_BITS_REG_INDEX(id); |
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141 | uint32_t o = GIC_ID_TO_TWO_BITS_REG_OFFSET(id) + 1; |
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142 | uint32_t bit = mode << o; |
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143 | uint32_t mask = 1U << o; |
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144 | uint32_t icdicfr = dist->icdicfr[i]; |
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145 | |
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146 | icdicfr &= ~mask; |
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147 | icdicfr |= bit; |
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148 | |
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149 | dist->icdicfr[i] = icdicfr; |
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150 | } |
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151 | |
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152 | typedef enum { |
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153 | GIC_N_TO_N, |
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154 | GIC_1_TO_N |
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155 | } gic_handling_model; |
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156 | |
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157 | static inline gic_handling_model gic_id_get_handling_model( |
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158 | volatile gic_dist *dist, |
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159 | uint32_t id |
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160 | ) |
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161 | { |
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162 | uint32_t i = GIC_ID_TO_TWO_BITS_REG_INDEX(id); |
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163 | uint32_t o = GIC_ID_TO_TWO_BITS_REG_OFFSET(id); |
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164 | uint32_t bit = 1U << o; |
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165 | |
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166 | return (dist->icdicfr[i] & bit) != 0 ? GIC_1_TO_N : GIC_N_TO_N; |
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167 | } |
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168 | |
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169 | static inline void gic_id_set_handling_model( |
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170 | volatile gic_dist *dist, |
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171 | uint32_t id, |
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172 | gic_handling_model model |
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173 | ) |
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174 | { |
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175 | uint32_t i = GIC_ID_TO_TWO_BITS_REG_INDEX(id); |
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176 | uint32_t o = GIC_ID_TO_TWO_BITS_REG_OFFSET(id); |
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177 | uint32_t bit = model << o; |
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178 | uint32_t mask = 1U << o; |
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179 | uint32_t icdicfr = dist->icdicfr[i]; |
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180 | |
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181 | icdicfr &= ~mask; |
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182 | icdicfr |= bit; |
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183 | |
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184 | dist->icdicfr[i] = icdicfr; |
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185 | } |
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186 | |
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187 | #ifdef __cplusplus |
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188 | } |
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189 | #endif /* __cplusplus */ |
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190 | |
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191 | #endif /* LIBBSP_ARM_SHARED_ARM_GIC_H */ |
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