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 | * http://www.rtems.com/license/LICENSE. |
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11 | */ |
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12 | #define __asm__ |
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13 | #include "irq.h" |
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14 | |
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15 | .extern edb7312_interrupt_dispatch |
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16 | |
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17 | /* |
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18 | * Function to obtain, execute an IT handler and acknowledge the IT |
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19 | */ |
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20 | |
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21 | .globl bsp_interrupt_dispatch |
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22 | bsp_interrupt_dispatch : |
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23 | /* |
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24 | * Look at interrupt status register to determine source. |
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25 | * From source, determine offset into expanded vector table |
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26 | * and load handler address into r0. |
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27 | */ |
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28 | |
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29 | ldr r1, =0x80000000 /* close to interrupt status/mask registers 1 */ |
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30 | ldr r2, =0x80001000 /* close to interrupt status/mask registers 2 */ |
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31 | ldr r3, =0x80002000 /* close to interrupt status/mask registers 3 */ |
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32 | |
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33 | stmdb sp!,{r4, r5, r6} |
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34 | |
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35 | /* |
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36 | * INTSR3 |
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37 | */ |
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38 | check_dai: |
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39 | ldr r4, [r3, #0x240] |
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40 | ldr r5, [r3, #0x280] |
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41 | and r6, r4, r5 /* only look at interrupts which are enabled */ |
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42 | tst r6, #0x0001 |
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43 | beq check_extfiq |
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44 | mov r0, #BSP_DAIINT |
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45 | b get_handler |
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46 | |
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47 | /* |
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48 | * INTSR1 |
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49 | */ |
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50 | check_extfiq: |
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51 | ldr r4, [r1, #0x240] |
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52 | ldr r5, [r1, #0x280] |
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53 | and r6, r4, r5 /* only look at interrupts which are enabled */ |
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54 | tst r6, #0x0001 |
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55 | beq check_bl |
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56 | mov r0, #BSP_EXTFIQ |
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57 | b get_handler |
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58 | |
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59 | check_bl: |
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60 | #if 0 |
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61 | MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES |
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62 | ldr r4, [r1, #0x240] |
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63 | ldr r5, [r1, #0x280] |
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64 | and r6, r4, r5 /* only look at interrupts which are enabled */ |
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65 | #endif |
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66 | tst r6, #0x0002 |
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67 | beq check_we |
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68 | mov r0, #BSP_BLINT |
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69 | b get_handler |
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70 | |
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71 | check_we: |
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72 | #if 0 |
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73 | MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES |
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74 | ldr r4, [r1, #0x240] |
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75 | ldr r5, [r1, #0x280] |
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76 | and r6, r4, r5 /* only look at interrupts which are enabled */ |
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77 | #endif |
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78 | tst r6, #0x0004 |
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79 | beq check_mc |
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80 | mov r0, #BSP_WEINT |
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81 | b get_handler |
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82 | |
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83 | check_mc: |
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84 | #if 0 |
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85 | MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES |
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86 | ldr r4, [r1, #0x240] |
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87 | ldr r5, [r1, #0x280] |
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88 | and r6, r4, r5 /* only look at interrupts which are enabled */ |
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89 | #endif |
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90 | tst r6, #0x0008 |
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91 | beq check_cs |
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92 | mov r0, #BSP_MCINT |
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93 | b get_handler |
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94 | |
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95 | check_cs: |
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96 | #if 0 |
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97 | MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES |
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98 | ldr r4, [r1, #0x240] |
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99 | ldr r5, [r1, #0x280] |
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100 | and r6, r4, r5 /* only look at interrupts which are enabled */ |
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101 | #endif |
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102 | tst r6, #0x0010 |
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103 | beq check_e1 |
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104 | mov r0, #BSP_CSINT |
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105 | b get_handler |
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106 | |
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107 | check_e1: |
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108 | #if 0 |
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109 | MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES |
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110 | ldr r4, [r1, #0x240] |
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111 | ldr r5, [r1, #0x280] |
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112 | and r6, r4, r5 /* only look at interrupts which are enabled */ |
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113 | #endif |
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114 | tst r6, #0x0020 |
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115 | beq check_e2 |
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116 | mov r0, #BSP_EINT1 |
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117 | b get_handler |
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118 | |
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119 | check_e2: |
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120 | #if 0 |
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121 | MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES |
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122 | ldr r4, [r1, #0x240] |
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123 | ldr r5, [r1, #0x280] |
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124 | and r6, r4, r5 /* only look at interrupts which are enabled */ |
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125 | #endif |
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126 | tst r6, #0x0040 |
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127 | beq check_e3 |
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128 | mov r0, #BSP_EINT2 |
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129 | b get_handler |
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130 | |
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131 | check_e3: |
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132 | #if 0 |
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133 | MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES |
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134 | ldr r4, [r1, #0x240] |
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135 | ldr r5, [r1, #0x280] |
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136 | and r6, r4, r5 /* only look at interrupts which are enabled */ |
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137 | #endif |
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138 | tst r6, #0x0080 |
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139 | beq check_tc1 |
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140 | mov r0, #BSP_EINT3 |
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141 | b get_handler |
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142 | |
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143 | check_tc1: |
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144 | #if 0 |
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145 | MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES |
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146 | ldr r4, [r1, #0x240] |
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147 | ldr r5, [r1, #0x280] |
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148 | and r6, r4, r5 /* only look at interrupts which are enabled */ |
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149 | #endif |
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150 | tst r6, #0x0100 |
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151 | beq check_tc2 |
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152 | mov r0, #BSP_TC1OI |
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153 | b get_handler |
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154 | |
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155 | check_tc2: |
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156 | #if 0 |
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157 | MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES |
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158 | ldr r4, [r1, #0x240] |
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159 | ldr r5, [r1, #0x280] |
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160 | and r6, r4, r5 /* only look at interrupts which are enabled */ |
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161 | #endif |
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162 | tst r6, #0x0200 |
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163 | beq check_rtc |
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164 | mov r0, #BSP_TC2OI |
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165 | b get_handler |
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166 | |
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167 | check_rtc: |
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168 | #if 0 |
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169 | MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES |
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170 | ldr r4, [r1, #0x240] |
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171 | ldr r5, [r1, #0x280] |
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172 | and r6, r4, r5 /* only look at interrupts which are enabled */ |
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173 | #endif |
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174 | tst r6, #0x0400 |
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175 | beq check_tick |
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176 | mov r0, #BSP_RTCMI |
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177 | b get_handler |
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178 | |
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179 | check_tick: |
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180 | #if 0 |
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181 | MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES |
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182 | ldr r4, [r1, #0x240] |
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183 | ldr r5, [r1, #0x280] |
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184 | and r6, r4, r5 /* only look at interrupts which are enabled */ |
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185 | #endif |
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186 | tst r6, #0x0800 |
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187 | beq check_utx1 |
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188 | mov r0, #BSP_TINT |
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189 | b get_handler |
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190 | |
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191 | check_utx1: |
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192 | #if 0 |
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193 | MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES |
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194 | ldr r4, [r1, #0x240] |
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195 | ldr r5, [r1, #0x280] |
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196 | and r6, r4, r5 /* only look at interrupts which are enabled */ |
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197 | #endif |
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198 | tst r6, #0x1000 |
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199 | beq check_urx1 |
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200 | mov r0, #BSP_UTXINT1 |
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201 | b get_handler |
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202 | |
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203 | check_urx1: |
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204 | #if 0 |
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205 | MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES |
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206 | ldr r4, [r1, #0x240] |
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207 | ldr r5, [r1, #0x280] |
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208 | and r6, r4, r5 /* only look at interrupts which are enabled */ |
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209 | #endif |
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210 | tst r6, #0x2000 |
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211 | beq check_ums |
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212 | mov r0, #BSP_URXINT1 |
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213 | b get_handler |
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214 | |
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215 | check_ums: |
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216 | #if 0 |
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217 | MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES |
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218 | ldr r4, [r1, #0x240] |
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219 | ldr r5, [r1, #0x280] |
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220 | and r6, r4, r5 /* only look at interrupts which are enabled */ |
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221 | #endif |
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222 | tst r6, #0x4000 |
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223 | beq check_sse |
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224 | mov r0, #BSP_UMSINT |
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225 | b get_handler |
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226 | |
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227 | check_sse: |
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228 | #if 0 |
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229 | MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES |
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230 | ldr r4, [r1, #0x240] |
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231 | ldr r5, [r1, #0x280] |
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232 | and r6, r4, r5 /* only look at interrupts which are enabled */ |
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233 | #endif |
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234 | tst r6, #0x8000 |
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235 | beq check_kbd |
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236 | mov r0, #BSP_SSEOTI |
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237 | b get_handler |
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238 | |
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239 | /* |
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240 | * INTSR2 |
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241 | */ |
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242 | check_kbd: |
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243 | ldr r4, [r2, #0x240] |
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244 | ldr r5, [r2, #0x280] |
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245 | and r6, r4, r5 /* only look at interrupts which are enabled */ |
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246 | tst r6, #0x0001 |
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247 | beq check_ss2rx |
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248 | mov r0, #BSP_KBDINT |
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249 | b get_handler |
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250 | |
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251 | check_ss2rx: |
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252 | #if 0 |
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253 | MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES |
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254 | ldr r4, [r2, #0x240] |
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255 | ldr r5, [r2, #0x280] |
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256 | and r6, r4, r5 /* only look at interrupts which are enabled */ |
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257 | #endif |
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258 | tst r6, #0x0002 |
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259 | beq check_ss2tx |
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260 | mov r0, #BSP_SS2RX |
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261 | b get_handler |
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262 | |
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263 | check_ss2tx: |
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264 | #if 0 |
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265 | MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES |
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266 | ldr r4, [r2, #0x240] |
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267 | ldr r5, [r2, #0x280] |
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268 | and r6, r4, r5 /* only look at interrupts which are enabled */ |
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269 | #endif |
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270 | tst r6, #0x0004 |
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271 | beq check_utx2 |
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272 | mov r0, #BSP_SS2TX |
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273 | b get_handler |
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274 | |
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275 | check_utx2: |
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276 | #if 0 |
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277 | MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES |
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278 | ldr r4, [r2, #0x240] |
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279 | ldr r5, [r2, #0x280] |
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280 | and r6, r4, r5 /* only look at interrupts which are enabled */ |
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281 | #endif |
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282 | tst r6, #0x1000 |
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283 | beq check_urx2 |
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284 | mov r0, #BSP_UTXINT2 |
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285 | b get_handler |
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286 | |
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287 | check_urx2: |
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288 | #if 0 |
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289 | MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES |
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290 | ldr r4, [r2, #0x240] |
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291 | ldr r5, [r2, #0x280] |
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292 | and r6, r4, r5 /* only look at interrupts which are enabled */ |
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293 | #endif |
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294 | tst r6, #0x2000 |
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295 | beq IRQ_NoInterrupt |
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296 | mov r0, #BSP_URXINT2 |
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297 | b get_handler |
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298 | |
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299 | get_handler: |
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300 | |
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301 | ldmia sp!,{r4, r5, r6} |
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302 | |
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303 | /* |
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304 | * re-enable interrupts at processor level as the current |
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305 | * interrupt source is now masked via VEGA logic |
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306 | */ |
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307 | /* |
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308 | mrs r1, cpsr |
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309 | and r1, r1, #0xFFFFFF3F |
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310 | msr cpsr, r1 |
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311 | */ |
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312 | |
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313 | stmdb sp!,{lr} |
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314 | bl edb7312_interrupt_dispatch |
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315 | ldmia sp!,{lr} |
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316 | |
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317 | IRQ_NoInterrupt: |
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318 | /* return to the "main" interrupt handler */ |
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319 | mov pc, lr |
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