1 | /* |
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2 | * Initialization Manager |
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3 | * |
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4 | * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. |
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5 | * On-Line Applications Research Corporation (OAR). |
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6 | * All rights assigned to U.S. Government, 1994. |
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7 | * |
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8 | * This material may be reproduced by or for the U.S. Government pursuant |
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9 | * to the copyright license under the clause at DFARS 252.227-7013. This |
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10 | * notice must appear in all copies of this file and its derivatives. |
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11 | * |
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12 | * $Id$ |
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13 | */ |
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14 | |
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15 | /* |
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16 | * INIT is defined so all of the data will be included in this |
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17 | * file. |
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18 | */ |
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19 | |
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20 | #define INIT |
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21 | |
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22 | #include <rtems/system.h> |
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23 | #include <rtems/config.h> |
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24 | #include <rtems/debug.h> |
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25 | #include <rtems/extension.h> |
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26 | #include <rtems/fatal.h> |
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27 | #include <rtems/init.h> |
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28 | #include <rtems/io.h> |
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29 | #include <rtems/sysstate.h> |
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30 | |
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31 | #include <rtems/core/copyrt.h> |
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32 | #include <rtems/core/heap.h> |
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33 | #include <rtems/core/interr.h> |
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34 | #include <rtems/core/intthrd.h> |
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35 | #include <rtems/core/isr.h> |
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36 | #include <rtems/core/mpci.h> |
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37 | #include <rtems/core/priority.h> |
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38 | #include <rtems/core/thread.h> |
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39 | #include <rtems/core/tod.h> |
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40 | #include <rtems/core/userext.h> |
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41 | #include <rtems/core/watchdog.h> |
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42 | #include <rtems/core/wkspace.h> |
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43 | |
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44 | #include <rtems/directives.h> |
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45 | #include <rtems/sptables.h> |
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46 | |
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47 | #include <rtems/rtems/rtemsapi.h> |
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48 | |
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49 | /*PAGE |
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50 | * |
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51 | * rtems_initialize_executive |
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52 | * |
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53 | * This directive initializes all the kernels data structures |
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54 | * to the states necessary for the kernel to begin execution. All |
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55 | * include files that contain global variable definitions should be |
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56 | * included in this file. The system threads and initialization threads |
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57 | * are created and started by this routine. This routine then |
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58 | * initiates multithreading. |
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59 | * |
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60 | * Input parameters: |
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61 | * configuration_table - pointer to the user's configuration table |
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62 | * cpu_table - pointer to the user's CPU configuration table |
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63 | * |
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64 | * Output parameters: NONE |
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65 | */ |
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66 | |
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67 | struct months { |
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68 | unsigned32 months[2][13]; |
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69 | }; |
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70 | |
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71 | void rtems_initialize_executive( |
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72 | rtems_configuration_table *configuration_table, |
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73 | rtems_cpu_table *cpu_table |
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74 | ) |
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75 | { |
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76 | rtems_interrupt_level bsp_level; |
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77 | |
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78 | bsp_level = rtems_initialize_executive_early(configuration_table, cpu_table); |
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79 | rtems_initialize_executive_late( bsp_level ); |
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80 | } |
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81 | |
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82 | rtems_interrupt_level rtems_initialize_executive_early( |
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83 | rtems_configuration_table *configuration_table, |
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84 | rtems_cpu_table *cpu_table |
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85 | ) |
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86 | { |
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87 | rtems_interrupt_level bsp_level; |
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88 | rtems_multiprocessing_table *multiprocessing_table; |
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89 | |
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90 | /* |
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91 | * Dispatching and interrupts are disabled until the end of the |
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92 | * initialization sequence. This prevents an inadvertent context |
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93 | * switch before the executive is initialized. |
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94 | */ |
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95 | |
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96 | _ISR_Disable( bsp_level ); |
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97 | |
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98 | if ( cpu_table == NULL ) |
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99 | _Internal_error_Occurred( |
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100 | INTERNAL_ERROR_CORE, |
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101 | TRUE, |
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102 | INTERNAL_ERROR_NO_CONFIGURATION_TABLE |
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103 | ); |
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104 | |
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105 | /* |
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106 | * Initialize the system state based on whether this is an MP system. |
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107 | */ |
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108 | |
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109 | multiprocessing_table = configuration_table->User_multiprocessing_table; |
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110 | |
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111 | _System_state_Handler_initialization( |
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112 | (multiprocessing_table) ? TRUE : FALSE |
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113 | ); |
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114 | |
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115 | /* |
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116 | * Provided just for user convenience. |
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117 | */ |
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118 | |
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119 | _Configuration_Table = configuration_table; |
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120 | _Configuration_MP_table = multiprocessing_table; |
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121 | |
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122 | /* |
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123 | * Internally we view single processor systems as a very restricted |
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124 | * multiprocessor system. |
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125 | */ |
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126 | |
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127 | if ( multiprocessing_table == NULL ) |
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128 | multiprocessing_table = |
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129 | (void *)&_Initialization_Default_multiprocessing_table; |
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130 | |
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131 | if ( cpu_table == NULL ) |
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132 | _Internal_error_Occurred( |
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133 | INTERNAL_ERROR_CORE, |
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134 | TRUE, |
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135 | INTERNAL_ERROR_NO_CPU_TABLE |
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136 | ); |
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137 | |
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138 | _CPU_Initialize( cpu_table, _Thread_Dispatch ); |
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139 | |
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140 | /* |
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141 | * Do this as early as possible to insure no debugging output |
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142 | * is even attempted to be printed. |
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143 | */ |
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144 | |
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145 | _Debug_Manager_initialization(); |
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146 | |
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147 | _Thread_Dispatch_initialization(); |
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148 | |
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149 | _User_extensions_Handler_initialization( |
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150 | configuration_table->User_extension_table |
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151 | ); |
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152 | |
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153 | _Workspace_Handler_initialization( |
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154 | (void *)configuration_table->work_space_start, |
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155 | configuration_table->work_space_size |
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156 | ); |
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157 | |
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158 | _ISR_Handler_initialization(); |
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159 | |
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160 | _Objects_Handler_initialization( |
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161 | multiprocessing_table->node, |
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162 | multiprocessing_table->maximum_nodes, |
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163 | multiprocessing_table->maximum_global_objects |
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164 | ); |
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165 | |
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166 | _Priority_Handler_initialization(); |
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167 | |
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168 | _Watchdog_Handler_initialization(); |
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169 | |
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170 | _TOD_Handler_initialization( configuration_table->microseconds_per_tick ); |
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171 | |
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172 | _Thread_Handler_initialization( |
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173 | configuration_table->ticks_per_timeslice, |
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174 | configuration_table->maximum_extensions, |
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175 | multiprocessing_table->maximum_proxies |
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176 | ); |
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177 | |
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178 | _MPCI_Handler_initialization( |
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179 | multiprocessing_table->User_mpci_table |
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180 | ); |
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181 | |
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182 | _Internal_threads_Initialization(); |
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183 | |
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184 | /* MANAGERS */ |
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185 | |
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186 | _Extension_Manager_initialization( configuration_table->maximum_extensions ); |
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187 | |
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188 | _IO_Manager_initialization( |
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189 | configuration_table->Device_driver_table, |
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190 | configuration_table->number_of_device_drivers, |
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191 | configuration_table->maximum_devices |
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192 | ); |
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193 | |
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194 | _RTEMS_API_Initialize( configuration_table ); |
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195 | |
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196 | if ( cpu_table->pretasking_hook ) |
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197 | (*cpu_table->pretasking_hook)(); |
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198 | |
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199 | _Internal_threads_Start(); |
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200 | |
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201 | _System_state_Set( SYSTEM_STATE_BEFORE_MULTITASKING ); |
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202 | |
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203 | return bsp_level; |
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204 | } |
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205 | |
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206 | void rtems_initialize_executive_late( |
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207 | rtems_interrupt_level bsp_level |
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208 | ) |
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209 | { |
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210 | |
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211 | _System_state_Set( SYSTEM_STATE_BEGIN_MULTITASKING ); |
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212 | |
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213 | _Thread_Start_multitasking( |
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214 | _Internal_threads_System_initialization_thread, |
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215 | _Internal_threads_Idle_thread |
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216 | ); |
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217 | |
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218 | /* |
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219 | * Restore the interrupt level to what the BSP had. Technically, |
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220 | * this is unnecessary since the BSP should have all interrupts |
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221 | * disabled when rtems_initialize_executive is invoked. But this keeps |
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222 | * the ISR Disable/Enable calls paired. |
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223 | */ |
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224 | |
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225 | _ISR_Enable( bsp_level ); |
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226 | } |
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227 | |
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228 | /*PAGE |
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229 | * |
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230 | * rtems_shutdown_executive |
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231 | * |
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232 | * This kernel routine shutdowns the executive. It halts multitasking |
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233 | * and returns control to the application execution "thread" which |
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234 | * initialially invoked the rtems_initialize_executive directive. |
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235 | * |
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236 | * Input parameters: NONE |
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237 | * |
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238 | * Output parameters: NONE |
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239 | */ |
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240 | |
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241 | void rtems_shutdown_executive( |
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242 | unsigned32 result |
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243 | ) |
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244 | { |
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245 | _Thread_Stop_multitasking(); |
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246 | } |
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