1 | /* |
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2 | * Cirrus EP7312 Intererrupt handler |
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3 | * |
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4 | * Copyright (c) 2002 by Jay Monkman <jtm@smoothsmoothie.com> |
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5 | * |
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6 | * Copyright (c) 2002 by Charlie Steader <charlies@poliac.com> |
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7 | * |
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8 | * The license and distribution terms for this file may be |
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9 | * found in the file LICENSE in this distribution or at |
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10 | * |
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11 | * http://www.rtems.com/license/LICENSE. |
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12 | * |
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13 | * |
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14 | * $Id$ |
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15 | */ |
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16 | #include <bsp.h> |
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17 | #include <irq.h> |
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18 | #include <rtems/score/thread.h> |
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19 | #include <rtems/score/apiext.h> |
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20 | #include <ep7312.h> |
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21 | |
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22 | /* |
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23 | * This function check that the value given for the irq line |
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24 | * is valid. |
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25 | */ |
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26 | |
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27 | static int isValidInterrupt(int irq) |
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28 | { |
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29 | if ( (irq < 0) || (irq > BSP_MAX_INT)) |
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30 | return 0; |
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31 | return 1; |
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32 | } |
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33 | |
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34 | /* |
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35 | * -------------------- RTEMS Single Irq Handler Mngt Routines ---------------- |
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36 | */ |
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37 | |
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38 | int BSP_install_rtems_irq_handler (const rtems_irq_connect_data* irq) |
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39 | { |
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40 | rtems_irq_hdl *HdlTable; |
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41 | rtems_interrupt_level level; |
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42 | |
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43 | if (!isValidInterrupt(irq->name)) { |
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44 | return 0; |
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45 | } |
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46 | /* |
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47 | * Check if default handler is actually connected. If not issue an error. |
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48 | */ |
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49 | HdlTable = (rtems_irq_hdl *) VECTOR_TABLE; |
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50 | if (*(HdlTable + irq->name) != default_int_handler) { |
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51 | return 0; |
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52 | } |
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53 | |
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54 | _CPU_ISR_Disable(level); |
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55 | |
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56 | /* |
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57 | * store the new handler |
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58 | */ |
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59 | *(HdlTable + irq->name) = irq->hdl; |
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60 | |
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61 | /* |
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62 | * unmask interrupt |
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63 | */ |
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64 | if(irq->name >= BSP_EXTFIQ && irq->name <= BSP_SSEOTI) |
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65 | { |
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66 | /* interrupt managed by INTMR1 and INTSR1 */ |
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67 | *EP7312_INTMR1 |= (1 << irq->name); |
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68 | } |
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69 | else if(irq->name >= BSP_KBDINT && irq->name <= BSP_SS2TX) |
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70 | { |
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71 | /* interrupt managed by INTMR2 and INTSR2 */ |
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72 | *EP7312_INTMR2 |= (1 << (irq->name - 16)); |
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73 | } |
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74 | else if(irq->name >= BSP_UTXINT2 && irq->name <= BSP_URXINT2) |
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75 | { |
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76 | /* interrupt managed by INTMR2 and INTSR2 */ |
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77 | *EP7312_INTMR2 |= (1 << (irq->name - 7)); |
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78 | } |
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79 | else if(irq->name == BSP_DAIINT) |
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80 | { |
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81 | /* interrupt managed by INTMR3 and INTSR3 */ |
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82 | *EP7312_INTMR3 |= (1 << (irq->name - 21)); |
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83 | } |
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84 | |
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85 | /* |
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86 | * Enable interrupt on device |
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87 | */ |
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88 | if(irq->on) |
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89 | { |
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90 | irq->on(irq); |
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91 | } |
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92 | |
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93 | _CPU_ISR_Enable(level); |
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94 | |
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95 | return 1; |
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96 | } |
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97 | |
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98 | int BSP_remove_rtems_irq_handler (const rtems_irq_connect_data* irq) |
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99 | { |
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100 | rtems_irq_hdl *HdlTable; |
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101 | rtems_interrupt_level level; |
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102 | |
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103 | if (!isValidInterrupt(irq->name)) { |
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104 | return 0; |
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105 | } |
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106 | /* |
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107 | * Check if the handler is actually connected. If not issue an error. |
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108 | */ |
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109 | HdlTable = (rtems_irq_hdl *) VECTOR_TABLE; |
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110 | if (*(HdlTable + irq->name) != irq->hdl) { |
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111 | return 0; |
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112 | } |
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113 | _CPU_ISR_Disable(level); |
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114 | |
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115 | /* |
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116 | * mask interrupt |
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117 | */ |
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118 | if(irq->name >= BSP_EXTFIQ && irq->name <= BSP_SSEOTI) |
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119 | { |
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120 | /* interrupt managed by INTMR1 and INTSR1 */ |
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121 | *EP7312_INTMR1 &= ~(1 << irq->name); |
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122 | } |
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123 | else if(irq->name >= BSP_KBDINT && irq->name <= BSP_SS2TX) |
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124 | { |
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125 | /* interrupt managed by INTMR2 and INTSR2 */ |
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126 | *EP7312_INTMR2 &= ~(1 << (irq->name - 16)); |
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127 | } |
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128 | else if(irq->name >= BSP_UTXINT2 && irq->name <= BSP_URXINT2) |
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129 | { |
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130 | /* interrupt managed by INTMR2 and INTSR2 */ |
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131 | *EP7312_INTMR2 &= ~(1 << (irq->name - 7)); |
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132 | } |
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133 | else if(irq->name == BSP_DAIINT) |
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134 | { |
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135 | /* interrupt managed by INTMR3 and INTSR3 */ |
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136 | *EP7312_INTMR3 &= ~(1 << (irq->name - 21)); |
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137 | } |
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138 | |
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139 | /* |
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140 | * Disable interrupt on device |
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141 | */ |
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142 | if(irq->off) |
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143 | irq->off(irq); |
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144 | |
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145 | /* |
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146 | * restore the default irq value |
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147 | */ |
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148 | *(HdlTable + irq->name) = default_int_handler; |
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149 | |
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150 | _CPU_ISR_Enable(level); |
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151 | |
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152 | return 1; |
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153 | } |
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154 | |
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155 | |
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