1 | /** |
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2 | * @file |
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3 | * |
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4 | * @ingroup RTEMSBSPsPowerPCMPC55XX |
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5 | * |
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6 | * @brief Source file for MPC55XX interrupt support. |
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7 | */ |
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8 | |
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9 | /* |
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10 | * Copyright (c) 2008-2012 embedded brains GmbH. All rights reserved. |
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11 | * |
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12 | * The license and distribution terms for this file may be |
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13 | * found in the file LICENSE in this distribution or at |
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14 | * http://www.rtems.org/license/LICENSE. |
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15 | */ |
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16 | |
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17 | #include <mpc55xx/regs.h> |
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18 | |
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19 | #include <libcpu/powerpc-utility.h> |
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20 | |
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21 | #include <bsp/irq.h> |
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22 | #include <bsp/vectors.h> |
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23 | #include <bsp/irq-generic.h> |
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24 | |
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25 | #define RTEMS_STATUS_CHECKS_USE_PRINTK |
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26 | |
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27 | #include <rtems/status-checks.h> |
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28 | |
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29 | /** |
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30 | * @brief Returns the priority @a priority of IRQ @a vector from the INTC. |
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31 | */ |
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32 | rtems_status_code mpc55xx_intc_get_priority( rtems_vector_number vector, unsigned *priority) |
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33 | { |
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34 | if (MPC55XX_IRQ_IS_VALID( vector)) { |
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35 | *priority = INTC.PSR [vector].B.PRI; |
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36 | return RTEMS_SUCCESSFUL; |
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37 | } else { |
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38 | *priority = MPC55XX_INTC_INVALID_PRIORITY; |
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39 | return RTEMS_INVALID_NUMBER; |
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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 | * @brief Sets the priority of IRQ @a vector to @a priority at the INTC. |
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45 | */ |
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46 | rtems_status_code mpc55xx_intc_set_priority( rtems_vector_number vector, unsigned priority) |
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47 | { |
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48 | if (MPC55XX_IRQ_IS_VALID( vector) && MPC55XX_INTC_IS_VALID_PRIORITY( priority)) { |
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49 | INTC.PSR [vector].B.PRI = priority; |
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50 | if (INTC.PSR [vector].B.PRI == priority) { |
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51 | return RTEMS_SUCCESSFUL; |
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52 | } else { |
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53 | return RTEMS_IO_ERROR; |
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54 | } |
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55 | } else { |
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56 | return RTEMS_INVALID_NUMBER; |
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57 | } |
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58 | } |
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59 | |
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60 | /** |
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61 | * @brief Raises the software IRQ with number @a vector. |
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62 | */ |
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63 | rtems_status_code mpc55xx_intc_raise_software_irq( rtems_vector_number vector) |
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64 | { |
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65 | if (MPC55XX_IRQ_IS_SOFTWARE( vector)) { |
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66 | INTC.SSCIR [vector].B.SET = 1; |
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67 | return RTEMS_SUCCESSFUL; |
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68 | } else { |
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69 | return RTEMS_INVALID_NUMBER; |
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70 | } |
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71 | } |
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72 | |
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73 | /** |
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74 | * @brief Clears the software IRQ with number @a vector. |
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75 | */ |
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76 | rtems_status_code mpc55xx_intc_clear_software_irq( rtems_vector_number vector) |
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77 | { |
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78 | if (MPC55XX_IRQ_IS_SOFTWARE( vector)) { |
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79 | INTC.SSCIR [vector].B.CLR = 1; |
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80 | return RTEMS_SUCCESSFUL; |
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81 | } else { |
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82 | return RTEMS_INVALID_NUMBER; |
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83 | } |
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84 | } |
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85 | |
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86 | /** |
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87 | * @brief Installs interrupt handler and sets priority. |
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88 | */ |
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89 | rtems_status_code mpc55xx_interrupt_handler_install( |
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90 | rtems_vector_number vector, |
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91 | const char *info, |
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92 | rtems_option options, |
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93 | unsigned priority, |
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94 | rtems_interrupt_handler handler, |
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95 | void *arg |
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96 | ) |
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97 | { |
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98 | if (MPC55XX_IRQ_IS_VALID( vector) && MPC55XX_INTC_IS_VALID_PRIORITY( priority)) { |
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99 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
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100 | |
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101 | sc = rtems_interrupt_handler_install( vector, info, options, handler, arg); |
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102 | RTEMS_CHECK_SC( sc, "Install interrupt handler"); |
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103 | |
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104 | return mpc55xx_intc_set_priority( vector, priority); |
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105 | } else { |
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106 | return RTEMS_INVALID_NUMBER; |
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107 | } |
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108 | } |
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109 | |
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110 | void bsp_interrupt_dispatch(uintptr_t exception_number) |
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111 | { |
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112 | /* Acknowledge interrupt request */ |
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113 | rtems_vector_number vector = INTC.IACKR.B.INTVEC; |
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114 | |
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115 | /* Save machine state and enable external exceptions */ |
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116 | uint32_t msr = ppc_external_exceptions_enable(); |
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117 | |
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118 | /* Dispatch interrupt handlers */ |
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119 | bsp_interrupt_handler_dispatch( vector); |
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120 | |
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121 | /* Restore machine state */ |
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122 | ppc_external_exceptions_disable( msr); |
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123 | |
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124 | /* End of interrupt */ |
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125 | INTC.EOIR.R = 1; |
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126 | } |
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127 | |
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128 | void bsp_interrupt_facility_initialize(void) |
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129 | { |
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130 | rtems_vector_number vector; |
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131 | |
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132 | /* Initialize interrupt controller */ |
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133 | |
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134 | /* Disable all interrupts */ |
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135 | for (vector = MPC55XX_IRQ_MIN; vector <= MPC55XX_IRQ_MAX; ++vector) { |
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136 | INTC.PSR [vector].B.PRI = MPC55XX_INTC_DISABLED_PRIORITY; |
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137 | } |
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138 | |
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139 | /* Software vector mode */ |
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140 | INTC.MCR.B.VTES = 0; |
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141 | INTC.MCR.B.HVEN = 0; |
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142 | |
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143 | /* Set current priority to 0 */ |
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144 | INTC.CPR.B.PRI = 0; |
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145 | } |
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146 | |
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147 | rtems_status_code bsp_interrupt_get_attributes( |
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148 | rtems_vector_number vector, |
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149 | rtems_interrupt_attributes *attributes |
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150 | ) |
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151 | { |
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152 | return RTEMS_SUCCESSFUL; |
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153 | } |
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154 | |
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155 | rtems_status_code bsp_interrupt_is_pending( |
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156 | rtems_vector_number vector, |
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157 | bool *pending |
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158 | ) |
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159 | { |
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160 | bsp_interrupt_assert(bsp_interrupt_is_valid_vector(vector)); |
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161 | bsp_interrupt_assert(pending != NULL); |
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162 | *pending = false; |
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163 | return RTEMS_UNSATISFIED; |
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164 | } |
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165 | |
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166 | rtems_status_code bsp_interrupt_raise(rtems_vector_number vector) |
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167 | { |
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168 | bsp_interrupt_assert(bsp_interrupt_is_valid_vector(vector)); |
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169 | return RTEMS_UNSATISFIED; |
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170 | } |
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171 | |
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172 | rtems_status_code bsp_interrupt_clear(rtems_vector_number vector) |
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173 | { |
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174 | bsp_interrupt_assert(bsp_interrupt_is_valid_vector(vector)); |
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175 | return RTEMS_UNSATISFIED; |
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176 | } |
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177 | |
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178 | rtems_status_code bsp_interrupt_vector_is_enabled( |
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179 | rtems_vector_number vector, |
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180 | bool *enabled |
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181 | ) |
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182 | { |
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183 | bsp_interrupt_assert(bsp_interrupt_is_valid_vector(vector)); |
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184 | bsp_interrupt_assert(enabled != NULL); |
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185 | *enabled = false; |
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186 | return RTEMS_UNSATISFIED; |
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187 | } |
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188 | |
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189 | rtems_status_code bsp_interrupt_vector_enable( rtems_vector_number vector) |
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190 | { |
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191 | bsp_interrupt_assert(bsp_interrupt_is_valid_vector(vector)); |
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192 | mpc55xx_intc_set_priority( vector, MPC55XX_INTC_DEFAULT_PRIORITY); |
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193 | return RTEMS_SUCCESSFUL; |
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194 | } |
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195 | |
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196 | rtems_status_code bsp_interrupt_vector_disable( rtems_vector_number vector) |
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197 | { |
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198 | bsp_interrupt_assert(bsp_interrupt_is_valid_vector(vector)); |
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199 | mpc55xx_intc_set_priority( vector, MPC55XX_INTC_DISABLED_PRIORITY); |
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200 | return RTEMS_SUCCESSFUL; |
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201 | } |
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