1 | /* |
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2 | * ERC32 Spurious Trap Handler |
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3 | * |
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4 | * This is just enough of a trap handler to let us know what |
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5 | * the likely source of the trap was. |
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6 | * |
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7 | * Developed as part of the port of RTEMS to the ERC32 implementation |
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8 | * of the SPARC by On-Line Applications Research Corporation (OAR) |
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9 | * under contract to the European Space Agency (ESA). |
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10 | * |
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11 | * COPYRIGHT (c) 1995. European Space Agency. |
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12 | * |
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13 | * This terms of the RTEMS license apply to this file. |
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14 | * |
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15 | * $Id$ |
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16 | */ |
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17 | |
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18 | #include <bsp.h> |
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19 | |
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20 | #include <string.h> |
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21 | |
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22 | static const char digits[16] = "0123456789abcdef"; |
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23 | |
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24 | /* Simple integer-to-string conversion */ |
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25 | |
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26 | void itos(unsigned32 u, char *s) |
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27 | { |
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28 | int i; |
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29 | |
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30 | for (i=0; i<8; i++) { |
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31 | s[i] = digits[(u >> (28 - (i*4))) & 0x0f]; |
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32 | } |
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33 | } |
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34 | |
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35 | /* |
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36 | * bsp_spurious_handler |
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37 | * |
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38 | * Print a message on the debug console and then die |
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39 | */ |
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40 | |
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41 | rtems_isr bsp_spurious_handler( |
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42 | rtems_vector_number trap, |
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43 | CPU_Interrupt_frame *isf |
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44 | ) |
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45 | { |
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46 | char line[ 80 ]; |
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47 | rtems_unsigned32 real_trap; |
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48 | |
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49 | real_trap = SPARC_REAL_TRAP_NUMBER(trap); |
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50 | |
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51 | strcpy(line, "Unexpected trap (0x ) at address 0x "); |
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52 | line[ 19 ] = digits[ real_trap >> 4 ]; |
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53 | line[ 20 ] = digits[ real_trap & 0xf ]; |
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54 | itos(isf->tpc, &line[36]); |
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55 | DEBUG_puts( line ); |
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56 | |
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57 | switch (real_trap) { |
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58 | |
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59 | /* |
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60 | * First the ones defined by the basic architecture |
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61 | */ |
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62 | |
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63 | case 0x00: |
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64 | DEBUG_puts( "reset" ); |
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65 | break; |
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66 | case 0x01: |
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67 | DEBUG_puts( "instruction access exception" ); |
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68 | break; |
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69 | case 0x02: |
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70 | DEBUG_puts( "illegal instruction" ); |
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71 | break; |
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72 | case 0x03: |
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73 | DEBUG_puts( "privileged instruction" ); |
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74 | break; |
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75 | case 0x04: |
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76 | DEBUG_puts( "fp disabled" ); |
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77 | break; |
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78 | case 0x07: |
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79 | DEBUG_puts( "memory address not aligned" ); |
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80 | break; |
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81 | case 0x08: |
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82 | DEBUG_puts( "fp exception" ); |
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83 | break; |
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84 | case 0x09: |
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85 | strcpy(line, "data access exception at 0x " ); |
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86 | itos(ERC32_MEC.First_Failing_Address, &line[27]); |
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87 | DEBUG_puts( line ); |
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88 | break; |
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89 | case 0x0A: |
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90 | DEBUG_puts( "tag overflow" ); |
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91 | break; |
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92 | |
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93 | /* |
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94 | * Then the ones defined by the ERC32 in particular |
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95 | */ |
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96 | |
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97 | case ERC32_TRAP_TYPE( ERC32_INTERRUPT_MASKED_ERRORS ): |
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98 | DEBUG_puts( "ERC32_INTERRUPT_MASKED_ERRORS" ); |
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99 | break; |
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100 | case ERC32_TRAP_TYPE( ERC32_INTERRUPT_EXTERNAL_1 ): |
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101 | DEBUG_puts( "ERC32_INTERRUPT_EXTERNAL_1" ); |
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102 | break; |
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103 | case ERC32_TRAP_TYPE( ERC32_INTERRUPT_EXTERNAL_2 ): |
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104 | DEBUG_puts( "ERC32_INTERRUPT_EXTERNAL_2" ); |
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105 | break; |
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106 | case ERC32_TRAP_TYPE( ERC32_INTERRUPT_UART_A_RX_TX ): |
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107 | DEBUG_puts( "ERC32_INTERRUPT_UART_A_RX_TX" ); |
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108 | break; |
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109 | case ERC32_TRAP_TYPE( ERC32_INTERRUPT_UART_B_RX_TX ): |
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110 | DEBUG_puts( "ERC32_INTERRUPT_UART_A_RX_TX" ); |
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111 | break; |
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112 | case ERC32_TRAP_TYPE( ERC32_INTERRUPT_CORRECTABLE_MEMORY_ERROR ): |
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113 | DEBUG_puts( "ERC32_INTERRUPT_CORRECTABLE_MEMORY_ERROR" ); |
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114 | break; |
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115 | case ERC32_TRAP_TYPE( ERC32_INTERRUPT_UART_ERROR ): |
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116 | DEBUG_puts( "ERC32_INTERRUPT_UART_ERROR" ); |
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117 | break; |
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118 | case ERC32_TRAP_TYPE( ERC32_INTERRUPT_DMA_ACCESS_ERROR ): |
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119 | DEBUG_puts( "ERC32_INTERRUPT_DMA_ACCESS_ERROR" ); |
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120 | break; |
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121 | case ERC32_TRAP_TYPE( ERC32_INTERRUPT_DMA_TIMEOUT ): |
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122 | DEBUG_puts( "ERC32_INTERRUPT_DMA_TIMEOUT" ); |
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123 | break; |
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124 | case ERC32_TRAP_TYPE( ERC32_INTERRUPT_EXTERNAL_3 ): |
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125 | DEBUG_puts( "ERC32_INTERRUPT_EXTERNAL_3" ); |
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126 | break; |
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127 | case ERC32_TRAP_TYPE( ERC32_INTERRUPT_EXTERNAL_4 ): |
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128 | DEBUG_puts( "ERC32_INTERRUPT_EXTERNAL_4" ); |
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129 | break; |
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130 | case ERC32_TRAP_TYPE( ERC32_INTERRUPT_GENERAL_PURPOSE_TIMER ): |
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131 | DEBUG_puts( "ERC32_INTERRUPT_GENERAL_PURPOSE_TIMER" ); |
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132 | break; |
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133 | case ERC32_TRAP_TYPE( ERC32_INTERRUPT_REAL_TIME_CLOCK ): |
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134 | DEBUG_puts( "ERC32_INTERRUPT_REAL_TIME_CLOCK" ); |
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135 | break; |
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136 | case ERC32_TRAP_TYPE( ERC32_INTERRUPT_EXTERNAL_5 ): |
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137 | DEBUG_puts( "ERC32_INTERRUPT_EXTERNAL_5" ); |
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138 | break; |
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139 | case ERC32_TRAP_TYPE( ERC32_INTERRUPT_WATCHDOG_TIMEOUT ): |
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140 | DEBUG_puts( "ERC32_INTERRUPT_WATCHDOG_TIMEOUT" ); |
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141 | break; |
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142 | |
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143 | default: |
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144 | break; |
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145 | } |
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146 | |
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147 | /* |
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148 | * What else can we do but stop ... |
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149 | */ |
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150 | |
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151 | asm volatile( "ta 0x0" ); |
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152 | } |
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153 | |
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154 | /* |
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155 | * bsp_spurious_initialize |
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156 | * |
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157 | * Install the spurious handler for most traps. Note that set_vector() |
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158 | * will unmask the corresponding asynchronous interrupt, so the initial |
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159 | * interrupt mask is restored after the handlers are installed. |
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160 | */ |
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161 | |
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162 | void bsp_spurious_initialize() |
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163 | { |
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164 | rtems_unsigned32 trap; |
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165 | unsigned32 level = 15; |
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166 | unsigned32 mask; |
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167 | |
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168 | sparc_disable_interrupts(level); |
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169 | mask = ERC32_MEC.Interrupt_Mask; |
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170 | |
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171 | for ( trap=0 ; trap<256 ; trap++ ) { |
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172 | |
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173 | /* |
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174 | * Skip window overflow, underflow, and flush as well as software |
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175 | * trap 0 which we will use as a shutdown. Also avoid trap 0x70 - 0x7f |
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176 | * which cannot happen and where some of the space is used to pass |
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177 | * paramaters to the program. |
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178 | */ |
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179 | |
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180 | if (( trap == 5 || trap == 6 || trap == 0x83 ) || |
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181 | (( trap >= 0x70 ) && ( trap <= 0x80 ))) |
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182 | continue; |
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183 | |
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184 | set_vector( bsp_spurious_handler, SPARC_SYNCHRONOUS_TRAP( trap ), 1 ); |
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185 | } |
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186 | |
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187 | ERC32_MEC.Interrupt_Mask = mask; |
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188 | sparc_enable_interrupts(level); |
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189 | |
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190 | } |
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