1 | /* |
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2 | * raw_exception.c - This file contains implementation of C function to |
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3 | * Instantiate 60x ppc primary exception entries. |
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4 | * More detailed information can be found on motorola |
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5 | * site and more precisely in the following book : |
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6 | * |
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7 | * MPC750 |
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8 | * Risc Microporcessor User's Manual |
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9 | * Motorola REF : MPC750UM/AD 8/97 |
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10 | * |
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11 | * Copyright (C) 1999 Eric Valette (valette@crf.canon.fr) |
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12 | * Canon Centre Recherche France. |
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13 | * |
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14 | * Enhanced by Jay Kulpinski <jskulpin@eng01.gdds.com> |
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15 | * to support 603, 603e, 604, 604e exceptions |
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16 | * |
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17 | * The license and distribution terms for this file may be |
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18 | * found in found in the file LICENSE in this distribution or at |
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19 | * http://www.rtems.com/license/LICENSE. |
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20 | * |
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21 | * $Id$ |
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22 | */ |
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23 | #include <rtems/system.h> |
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24 | #include <rtems/score/powerpc.h> |
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25 | #include <rtems/bspIo.h> |
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26 | #include <libcpu/raw_exception.h> |
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27 | #include <libcpu/cpuIdent.h> |
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28 | |
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29 | #include <string.h> |
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30 | |
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31 | static rtems_raw_except_connect_data* raw_except_table; |
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32 | static rtems_raw_except_connect_data default_raw_except_entry; |
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33 | static rtems_raw_except_global_settings* local_settings; |
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34 | |
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35 | void * codemove(void *, const void *, unsigned int, unsigned long); |
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36 | |
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37 | void* mpc60x_get_vector_addr(rtems_vector vector) |
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38 | { |
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39 | extern rtems_cpu_table Cpu_table; |
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40 | |
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41 | if ( Cpu_table.exceptions_in_RAM ) |
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42 | return ((void*) (((unsigned) vector) << 8)); |
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43 | |
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44 | return ((void*) (((unsigned) vector) << 8) + 0xfff00000); |
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45 | } |
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46 | |
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47 | int mpc750_vector_is_valid(rtems_vector vector) |
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48 | |
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49 | { |
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50 | switch(vector) { |
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51 | case ASM_RESET_VECTOR: /* fall through */ |
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52 | case ASM_MACH_VECTOR: |
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53 | case ASM_PROT_VECTOR: |
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54 | case ASM_ISI_VECTOR: |
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55 | case ASM_EXT_VECTOR: |
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56 | case ASM_ALIGN_VECTOR: |
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57 | case ASM_PROG_VECTOR: |
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58 | case ASM_FLOAT_VECTOR: |
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59 | case ASM_DEC_VECTOR: |
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60 | case ASM_SYS_VECTOR: |
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61 | case ASM_TRACE_VECTOR: |
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62 | case ASM_ADDR_VECTOR: |
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63 | case ASM_SYSMGMT_VECTOR: |
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64 | case ASM_ITM_VECTOR: |
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65 | return 1; |
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66 | default: return 0; |
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67 | } |
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68 | } |
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69 | |
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70 | int mpc603_vector_is_valid(rtems_vector vector) |
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71 | { |
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72 | switch(vector) { |
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73 | case ASM_RESET_VECTOR: /* fall through */ |
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74 | case ASM_MACH_VECTOR: |
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75 | case ASM_PROT_VECTOR: |
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76 | case ASM_ISI_VECTOR: |
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77 | case ASM_EXT_VECTOR: |
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78 | case ASM_ALIGN_VECTOR: |
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79 | case ASM_PROG_VECTOR: |
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80 | case ASM_FLOAT_VECTOR: |
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81 | case ASM_DEC_VECTOR: |
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82 | case ASM_SYS_VECTOR: |
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83 | case ASM_TRACE_VECTOR: |
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84 | return 1; |
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85 | case ASM_PERFMON_VECTOR: |
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86 | return 0; |
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87 | case ASM_IMISS_VECTOR: /* fall through */ |
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88 | case ASM_DLMISS_VECTOR: |
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89 | case ASM_DSMISS_VECTOR: |
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90 | case ASM_ADDR_VECTOR: |
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91 | case ASM_SYSMGMT_VECTOR: |
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92 | return 1; |
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93 | case ASM_ITM_VECTOR: |
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94 | return 0; |
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95 | } |
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96 | return 0; |
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97 | } |
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98 | |
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99 | int mpc604_vector_is_valid(rtems_vector vector) |
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100 | { |
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101 | switch(vector) { |
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102 | case ASM_RESET_VECTOR: /* fall through */ |
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103 | case ASM_MACH_VECTOR: |
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104 | case ASM_PROT_VECTOR: |
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105 | case ASM_ISI_VECTOR: |
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106 | case ASM_EXT_VECTOR: |
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107 | case ASM_ALIGN_VECTOR: |
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108 | case ASM_PROG_VECTOR: |
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109 | case ASM_FLOAT_VECTOR: |
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110 | case ASM_DEC_VECTOR: |
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111 | case ASM_SYS_VECTOR: |
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112 | case ASM_TRACE_VECTOR: |
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113 | case ASM_PERFMON_VECTOR: |
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114 | return 1; |
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115 | case ASM_IMISS_VECTOR: /* fall through */ |
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116 | case ASM_DLMISS_VECTOR: |
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117 | case ASM_DSMISS_VECTOR: |
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118 | return 0; |
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119 | case ASM_ADDR_VECTOR: /* fall through */ |
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120 | case ASM_SYSMGMT_VECTOR: |
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121 | return 1; |
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122 | case ASM_ITM_VECTOR: |
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123 | return 0; |
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124 | } |
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125 | return 0; |
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126 | } |
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127 | |
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128 | int mpc60x_vector_is_valid(rtems_vector vector) |
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129 | { |
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130 | switch (current_ppc_cpu) { |
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131 | case PPC_7400: |
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132 | case PPC_750: |
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133 | if (!mpc750_vector_is_valid(vector)) { |
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134 | return 0; |
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135 | } |
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136 | break; |
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137 | case PPC_604: |
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138 | case PPC_604e: |
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139 | case PPC_604r: |
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140 | case PPC_7455: /* Kate Feng */ |
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141 | if (!mpc604_vector_is_valid(vector)) { |
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142 | return 0; |
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143 | } |
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144 | break; |
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145 | case PPC_603: |
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146 | case PPC_603e: |
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147 | case PPC_603ev: |
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148 | case PPC_8260: |
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149 | /* case PPC_8240: -- same value as 8260 */ |
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150 | case PPC_8245: |
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151 | if (!mpc603_vector_is_valid(vector)) { |
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152 | return 0; |
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153 | } |
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154 | break; |
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155 | default: |
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156 | printk("Please complete " |
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157 | "libcpu/powerpc/mpc6xx/exceptions/raw_exception.c\n" |
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158 | "current_ppc_cpu = %x\n", current_ppc_cpu); |
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159 | return 0; |
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160 | } |
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161 | return 1; |
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162 | } |
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163 | |
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164 | int mpc60x_set_exception (const rtems_raw_except_connect_data* except) |
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165 | { |
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166 | unsigned int level; |
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167 | |
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168 | if (!mpc60x_vector_is_valid(except->exceptIndex)) { |
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169 | printk("mpc60x_set_exception: vector %d is not valid\n", |
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170 | except->exceptIndex); |
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171 | return 0; |
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172 | } |
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173 | /* |
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174 | * Check if default handler is actually connected. If not issue an error. |
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175 | * You must first get the current handler via mpc60x_get_current_exception |
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176 | * and then disconnect it using mpc60x_delete_exception. |
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177 | * RATIONALE : to always have the same transition by forcing the user |
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178 | * to get the previous handler before accepting to disconnect. |
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179 | */ |
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180 | |
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181 | if (memcmp(mpc60x_get_vector_addr(except->exceptIndex), |
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182 | (void*)default_raw_except_entry.hdl.raw_hdl, |
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183 | default_raw_except_entry.hdl.raw_hdl_size)) { |
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184 | printk("mpc60x_set_exception: raw vector not installed\n"); |
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185 | return 0; |
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186 | } |
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187 | |
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188 | _CPU_ISR_Disable(level); |
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189 | |
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190 | raw_except_table [except->exceptIndex] = *except; |
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191 | codemove((void*)mpc60x_get_vector_addr(except->exceptIndex), |
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192 | except->hdl.raw_hdl, |
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193 | except->hdl.raw_hdl_size, |
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194 | PPC_CACHE_ALIGNMENT); |
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195 | except->on(except); |
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196 | |
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197 | _CPU_ISR_Enable(level); |
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198 | return 1; |
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199 | } |
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200 | |
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201 | int mpc60x_get_current_exception (rtems_raw_except_connect_data* except) |
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202 | { |
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203 | if (!mpc60x_vector_is_valid(except->exceptIndex)){ |
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204 | return 0; |
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205 | } |
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206 | |
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207 | *except = raw_except_table [except->exceptIndex]; |
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208 | |
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209 | return 1; |
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210 | } |
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211 | |
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212 | int mpc60x_delete_exception (const rtems_raw_except_connect_data* except) |
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213 | { |
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214 | unsigned int level; |
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215 | |
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216 | if (!mpc60x_vector_is_valid(except->exceptIndex)){ |
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217 | return 0; |
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218 | } |
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219 | /* |
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220 | * Check if handler passed is actually connected. If not issue an error. |
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221 | * You must first get the current handler via mpc60x_get_current_exception |
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222 | * and then disconnect it using mpc60x_delete_exception. |
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223 | * RATIONALE : to always have the same transition by forcing the user |
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224 | * to get the previous handler before accepting to disconnect. |
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225 | */ |
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226 | if (memcmp(mpc60x_get_vector_addr(except->exceptIndex), |
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227 | (void*)except->hdl.raw_hdl, |
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228 | except->hdl.raw_hdl_size)) { |
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229 | return 0; |
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230 | } |
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231 | _CPU_ISR_Disable(level); |
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232 | |
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233 | except->off(except); |
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234 | codemove((void*)mpc60x_get_vector_addr(except->exceptIndex), |
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235 | default_raw_except_entry.hdl.raw_hdl, |
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236 | default_raw_except_entry.hdl.raw_hdl_size, |
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237 | PPC_CACHE_ALIGNMENT); |
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238 | |
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239 | |
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240 | raw_except_table[except->exceptIndex] = default_raw_except_entry; |
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241 | raw_except_table[except->exceptIndex].exceptIndex = except->exceptIndex; |
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242 | |
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243 | _CPU_ISR_Enable(level); |
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244 | |
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245 | return 1; |
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246 | } |
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247 | |
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248 | /* |
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249 | * Exception global init. |
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250 | */ |
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251 | int mpc60x_init_exceptions (rtems_raw_except_global_settings* config) |
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252 | { |
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253 | unsigned i; |
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254 | unsigned int level; |
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255 | |
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256 | /* |
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257 | * store various accelerators |
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258 | */ |
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259 | raw_except_table = config->rawExceptHdlTbl; |
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260 | local_settings = config; |
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261 | default_raw_except_entry = config->defaultRawEntry; |
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262 | |
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263 | _CPU_ISR_Disable(level); |
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264 | |
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265 | for (i=0; i <= LAST_VALID_EXC; i++) { |
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266 | if (!mpc60x_vector_is_valid(i)){ |
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267 | continue; |
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268 | } |
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269 | codemove((void*)mpc60x_get_vector_addr(i), |
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270 | raw_except_table[i].hdl.raw_hdl, |
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271 | raw_except_table[i].hdl.raw_hdl_size, |
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272 | PPC_CACHE_ALIGNMENT); |
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273 | if (raw_except_table[i].hdl.raw_hdl != default_raw_except_entry.hdl.raw_hdl) { |
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274 | raw_except_table[i].on(&raw_except_table[i]); |
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275 | } |
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276 | else { |
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277 | raw_except_table[i].off(&raw_except_table[i]); |
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278 | } |
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279 | } |
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280 | _CPU_ISR_Enable(level); |
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281 | |
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282 | return 1; |
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283 | } |
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284 | |
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285 | int mpc60x_get_exception_config (rtems_raw_except_global_settings** config) |
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286 | { |
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287 | *config = local_settings; |
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288 | return 1; |
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289 | } |
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