1 | /* |
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2 | * MCF5206eLITE startup code |
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3 | * |
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4 | * This file contains the entry point for the application. |
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5 | * The name of this entry point is compiler dependent. |
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6 | * It jumps to the BSP which is responsible for performing |
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7 | * all initialization. |
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8 | */ |
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9 | |
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10 | /* |
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11 | * Copyright (C) 2000 OKTET Ltd., St.-Petersburg, Russia |
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12 | * Author: Victor V. Vengerov <vvv@oktet.ru> |
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13 | * |
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14 | * Based on work: |
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15 | * Author: |
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16 | * David Fiddes, D.J@fiddes.surfaid.org |
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17 | * http://www.calm.hw.ac.uk/davidf/coldfire/ |
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18 | * |
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19 | * COPYRIGHT (c) 1989-1998. |
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20 | * On-Line Applications Research Corporation (OAR). |
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21 | * |
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22 | * The license and distribution terms for this file may be |
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23 | * found in the file LICENSE in this distribution or at |
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24 | * http://www.rtems.org/license/LICENSE. |
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25 | */ |
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26 | |
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27 | #include <rtems/asm.h> |
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28 | #include "bsp.h" |
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29 | |
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30 | BEGIN_CODE |
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31 | |
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32 | /* Initial stack situated in on-chip static memory */ |
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33 | #define INITIAL_STACK BSP_MEM_ADDR_SRAM+BSP_MEM_SIZE_SRAM-4 |
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34 | |
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35 | PUBLIC (INTERRUPT_VECTOR) |
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36 | SYM(INTERRUPT_VECTOR): |
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37 | .long INITIAL_STACK | 00: initial SSP |
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38 | .long start | 01: Initial PC |
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39 | .long _unexp_exception | 02: Access Error |
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40 | .long _unexp_exception | 03: Address Error |
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41 | .long _unexp_exception | 04: Illegal Instruction |
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42 | .long _reserved_int | 05: Reserved |
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43 | .long _reserved_int | 06: Reserved |
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44 | .long _reserved_int | 07: Reserved |
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45 | .long _unexp_exception | 08: Priveledge Violation |
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46 | .long _unexp_exception | 09: Trace |
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47 | .long _unexp_exception | 0A: Unimplemented A-Line |
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48 | .long _unexp_exception | 0B: Unimplemented F-Line |
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49 | .long _unexp_exception | 0C: Debug interrupt |
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50 | .long _reserved_int | 0D: Reserved |
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51 | .long _unexp_exception | 0E: Format error |
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52 | .long _unexp_exception | 0F: Uninitialized interrupt |
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53 | .long _reserved_int | 10: Reserved |
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54 | .long _reserved_int | 11: Reserved |
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55 | .long _reserved_int | 12: Reserved |
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56 | .long _reserved_int | 13: Reserved |
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57 | .long _reserved_int | 14: Reserved |
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58 | .long _reserved_int | 15: Reserved |
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59 | .long _reserved_int | 16: Reserved |
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60 | .long _reserved_int | 17: Reserved |
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61 | .long _spurious_int | 18: Spurious interrupt |
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62 | .long _avec1_int | 19: Autovector Level 1 |
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63 | .long _avec2_int | 1A: Autovector Level 2 |
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64 | .long _avec3_int | 1B: Autovector Level 3 |
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65 | .long _avec4_int | 1C: Autovector Level 4 |
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66 | .long _avec5_int | 1D: Autovector Level 5 |
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67 | .long _avec6_int | 1E: Autovector Level 6 |
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68 | .long _avec7_int | 1F: Autovector Level 7 |
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69 | .long _unexp_exception | 20: TRAP #0 |
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70 | .long _unexp_exception | 21: TRAP #1 |
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71 | .long _unexp_exception | 22: TRAP #2 |
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72 | .long _unexp_exception | 23: TRAP #3 |
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73 | .long _unexp_exception | 24: TRAP #4 |
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74 | .long _unexp_exception | 25: TRAP #5 |
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75 | .long _unexp_exception | 26: TRAP #6 |
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76 | .long _unexp_exception | 27: TRAP #7 |
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77 | .long _unexp_exception | 28: TRAP #8 |
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78 | .long _unexp_exception | 29: TRAP #9 |
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79 | .long _unexp_exception | 2A: TRAP #10 |
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80 | .long _unexp_exception | 2B: TRAP #11 |
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81 | .long _unexp_exception | 2C: TRAP #12 |
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82 | .long _unexp_exception | 2D: TRAP #13 |
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83 | .long _unexp_exception | 2E: TRAP #14 |
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84 | .long _unexp_exception | 2F: TRAP #15 |
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85 | .long _reserved_int | 30: Reserved |
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86 | .long _reserved_int | 31: Reserved |
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87 | .long _reserved_int | 32: Reserved |
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88 | .long _reserved_int | 33: Reserved |
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89 | .long _reserved_int | 34: Reserved |
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90 | .long _reserved_int | 35: Reserved |
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91 | .long _reserved_int | 36: Reserved |
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92 | .long _reserved_int | 37: Reserved |
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93 | .long _reserved_int | 38: Reserved |
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94 | .long _reserved_int | 39: Reserved |
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95 | .long _reserved_int | 3A: Reserved |
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96 | .long _reserved_int | 3B: Reserved |
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97 | .long _reserved_int | 3C: Reserved |
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98 | .long _reserved_int | 3D: Reserved |
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99 | .long _reserved_int | 3E: Reserved |
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100 | .long _reserved_int | 3F: Reserved |
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101 | |
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102 | .long _unexp_int | 40-FF: User defined interrupts |
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103 | .long _unexp_int |
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104 | .long _unexp_int |
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105 | .long _unexp_int |
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106 | .long _unexp_int |
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107 | .long _unexp_int |
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108 | .long _unexp_int |
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109 | .long _unexp_int |
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110 | .long _unexp_int |
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111 | .long _unexp_int |
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112 | .long _unexp_int |
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113 | .long _unexp_int |
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114 | .long _unexp_int |
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115 | .long _unexp_int |
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116 | .long _unexp_int |
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117 | .long _unexp_int |
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118 | |
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119 | .long _unexp_int | 50: |
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120 | .long _unexp_int |
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121 | .long _unexp_int |
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122 | .long _unexp_int |
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123 | .long _unexp_int |
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124 | .long _unexp_int |
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125 | .long _unexp_int |
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126 | .long _unexp_int |
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127 | .long _unexp_int |
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128 | .long _unexp_int |
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129 | .long _unexp_int |
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130 | .long _unexp_int |
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131 | .long _unexp_int |
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132 | .long _unexp_int |
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133 | .long _unexp_int |
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134 | .long _unexp_int |
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135 | |
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136 | .long _unexp_int | 60: |
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137 | .long _unexp_int |
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138 | .long _unexp_int |
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139 | .long _unexp_int |
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140 | .long _unexp_int |
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141 | .long _unexp_int |
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142 | .long _unexp_int |
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143 | .long _unexp_int |
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144 | .long _unexp_int |
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145 | .long _unexp_int |
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146 | .long _unexp_int |
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147 | .long _unexp_int |
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148 | .long _unexp_int |
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149 | .long _unexp_int |
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150 | .long _unexp_int |
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151 | .long _unexp_int |
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152 | |
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153 | .long _unexp_int | 70: |
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154 | .long _unexp_int |
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155 | .long _unexp_int |
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156 | .long _unexp_int |
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157 | .long _unexp_int |
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158 | .long _unexp_int |
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159 | .long _unexp_int |
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160 | .long _unexp_int |
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161 | .long _unexp_int |
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162 | .long _unexp_int |
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163 | .long _unexp_int |
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164 | .long _unexp_int |
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165 | .long _unexp_int |
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166 | .long _unexp_int |
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167 | .long _unexp_int |
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168 | .long _unexp_int |
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169 | |
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170 | .long _unexp_int | 80: |
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171 | .long _unexp_int |
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172 | .long _unexp_int |
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173 | .long _unexp_int |
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174 | .long _unexp_int |
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175 | .long _unexp_int |
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176 | .long _unexp_int |
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177 | .long _unexp_int |
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178 | .long _unexp_int |
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179 | .long _unexp_int |
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180 | .long _unexp_int |
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181 | .long _unexp_int |
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182 | .long _unexp_int |
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183 | .long _unexp_int |
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184 | .long _unexp_int |
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185 | .long _unexp_int |
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186 | |
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187 | .long _unexp_int | 90: |
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188 | .long _unexp_int |
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189 | .long _unexp_int |
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190 | .long _unexp_int |
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191 | .long _unexp_int |
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192 | .long _unexp_int |
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193 | .long _unexp_int |
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194 | .long _unexp_int |
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195 | .long _unexp_int |
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196 | .long _unexp_int |
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197 | .long _unexp_int |
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198 | .long _unexp_int |
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199 | .long _unexp_int |
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200 | .long _unexp_int |
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201 | .long _unexp_int |
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202 | .long _unexp_int |
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203 | |
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204 | .long _unexp_int | A0: |
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205 | .long _unexp_int |
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206 | .long _unexp_int |
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207 | .long _unexp_int |
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208 | .long _unexp_int |
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209 | .long _unexp_int |
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210 | .long _unexp_int |
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211 | .long _unexp_int |
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212 | .long _unexp_int |
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213 | .long _unexp_int |
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214 | .long _unexp_int |
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215 | .long _unexp_int |
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216 | .long _unexp_int |
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217 | .long _unexp_int |
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218 | .long _unexp_int |
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219 | .long _unexp_int |
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220 | |
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221 | .long _unexp_int | B0: |
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222 | .long _unexp_int |
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223 | .long _unexp_int |
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224 | .long _unexp_int |
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225 | .long _unexp_int |
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226 | .long _unexp_int |
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227 | .long _unexp_int |
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228 | .long _unexp_int |
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229 | .long _unexp_int |
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230 | .long _unexp_int |
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231 | .long _unexp_int |
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232 | .long _unexp_int |
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233 | .long _unexp_int |
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234 | .long _unexp_int |
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235 | .long _unexp_int |
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236 | .long _unexp_int |
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237 | |
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238 | .long _unexp_int | C0: |
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239 | .long _unexp_int |
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240 | .long _unexp_int |
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241 | .long _unexp_int |
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242 | .long _unexp_int |
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243 | .long _unexp_int |
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244 | .long _unexp_int |
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245 | .long _unexp_int |
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246 | .long _unexp_int |
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247 | .long _unexp_int |
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248 | .long _unexp_int |
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249 | .long _unexp_int |
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250 | .long _unexp_int |
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251 | .long _unexp_int |
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252 | .long _unexp_int |
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253 | .long _unexp_int |
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254 | |
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255 | .long _unexp_int | D0: |
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256 | .long _unexp_int |
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257 | .long _unexp_int |
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258 | .long _unexp_int |
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259 | .long _unexp_int |
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260 | .long _unexp_int |
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261 | .long _unexp_int |
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262 | .long _unexp_int |
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263 | .long _unexp_int |
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264 | .long _unexp_int |
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265 | .long _unexp_int |
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266 | .long _unexp_int |
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267 | .long _unexp_int |
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268 | .long _unexp_int |
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269 | .long _unexp_int |
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270 | .long _unexp_int |
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271 | |
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272 | .long _unexp_int | E0: |
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273 | .long _unexp_int |
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274 | .long _unexp_int |
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275 | .long _unexp_int |
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276 | .long _unexp_int |
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277 | .long _unexp_int |
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278 | .long _unexp_int |
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279 | .long _unexp_int |
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280 | .long _unexp_int |
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281 | .long _unexp_int |
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282 | .long _unexp_int |
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283 | .long _unexp_int |
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284 | .long _unexp_int |
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285 | .long _unexp_int |
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286 | .long _unexp_int |
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287 | .long _unexp_int |
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288 | |
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289 | .long _unexp_int | F0: |
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290 | .long _unexp_int |
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291 | .long _unexp_int |
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292 | .long _unexp_int |
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293 | .long _unexp_int |
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294 | .long _unexp_int |
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295 | .long _unexp_int |
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296 | .long _unexp_int |
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297 | .long _unexp_int |
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298 | .long _unexp_int |
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299 | .long _unexp_int |
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300 | .long _unexp_int |
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301 | .long _unexp_int |
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302 | .long _unexp_int |
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303 | .long _unexp_int |
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304 | .long _unexp_int |
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305 | |
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306 | PUBLIC(start) |
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307 | SYM(start): |
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308 | move.w #0x2700,sr | First turn off all interrupts! |
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309 | |
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310 | move.l #(BSP_MEM_ADDR_SRAM + MCF5206E_RAMBAR_V),d0 |
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311 | movec d0,rambar0 | ...so we have a stack |
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312 | |
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313 | move.l #(INITIAL_STACK),sp | Set up stack again (may be we are |
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314 | | going here from monitor or with |
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315 | | BDM interface assistance) |
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316 | |
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317 | /* |
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318 | * Remainder of the startup code is handled by C code |
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319 | */ |
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320 | jmp SYM(Init5206e) | Start C code (which never returns) |
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321 | |
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322 | /*************************************************************************** |
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323 | Function : CopyDataClearBSSAndStart |
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324 | |
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325 | Description : Copy DATA segment, clear BSS segment, initialize heap, |
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326 | initialise real stack, start C program. Assume that DATA and BSS sizes |
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327 | are multiples of 4. |
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328 | ***************************************************************************/ |
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329 | PUBLIC (CopyDataClearBSSAndStart) |
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330 | SYM(CopyDataClearBSSAndStart): |
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331 | lea copy_start,a0 | Get start of DATA in RAM |
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332 | lea SYM(etext),a2 | Get start of DATA in ROM |
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333 | cmpl a0,a2 | Are they the same? |
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334 | beq.s NOCOPY | Yes, no copy necessary |
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335 | lea copy_end,a1 | Get end of DATA in RAM |
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336 | bra.s COPYLOOPTEST | Branch into copy loop |
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337 | COPYLOOP: |
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338 | movel a2@+,a0@+ | Copy word from ROM to RAM |
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339 | COPYLOOPTEST: |
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340 | cmpl a1,a0 | Done? |
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341 | bcs.s COPYLOOP | No, skip |
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342 | NOCOPY: |
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343 | |
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344 | lea clear_start,a0 | Get start of BSS |
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345 | lea clear_end,a1 | Get end of BSS |
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346 | clrl d0 | Value to set |
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347 | bra.s ZEROLOOPTEST | Branch into clear loop |
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348 | ZEROLOOP: |
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349 | movel d0,a0@+ | Clear a word |
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350 | ZEROLOOPTEST: |
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351 | cmpl a1,a0 | Done? |
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352 | bcs.s ZEROLOOP | No, skip |
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353 | move 4(a7),d0 |
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354 | |
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355 | /* |
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356 | * Right : Now we're ready to boot RTEMS |
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357 | */ |
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358 | move.l #_ISR_Stack_area_end,sp | Use configuration defined stack |
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359 | clrl d0 | Pass in null to all boot_card() params |
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360 | movel d0,a7@- | command line |
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361 | jsr SYM(boot_card) | Call C boot_card function to startup RTEMS |
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362 | |
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363 | # Wait forever |
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364 | _stop: |
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365 | nop |
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366 | stop #0x2700 |
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367 | jmp _stop |
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368 | |
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369 | # The following labelled nops is a placeholders for breakpoints |
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370 | _unexp_exception: |
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371 | nop |
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372 | jmp _stop |
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373 | |
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374 | _unexp_int: |
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375 | nop |
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376 | jmp _stop |
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377 | |
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378 | _reserved_int: |
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379 | nop |
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380 | jmp _stop |
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381 | |
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382 | _spurious_int: |
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383 | nop |
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384 | jmp _stop |
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385 | |
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386 | _avec1_int: |
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387 | nop |
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388 | jmp _unexp_int |
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389 | |
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390 | _avec2_int: |
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391 | nop |
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392 | jmp _unexp_int |
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393 | |
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394 | _avec3_int: |
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395 | nop |
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396 | jmp _unexp_int |
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397 | |
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398 | _avec4_int: |
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399 | nop |
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400 | jmp _unexp_int |
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401 | |
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402 | _avec5_int: |
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403 | nop |
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404 | jmp _unexp_int |
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405 | |
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406 | _avec6_int: |
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407 | nop |
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408 | jmp _unexp_int |
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409 | |
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410 | _avec7_int: |
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411 | nop |
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412 | jmp _unexp_int |
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413 | |
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414 | END_CODE |
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415 | |
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416 | END |
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