1 | /* |
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2 | * This set of routines starts the application. It includes application, |
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3 | * board, and monitor specific initialization and configuration. |
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4 | * The generic CPU dependent initialization has been performed |
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5 | * before any of these are invoked. |
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6 | * |
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7 | * COPYRIGHT (c) 1989-1999. |
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8 | * On-Line Applications Research Corporation (OAR). |
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9 | * |
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10 | * The license and distribution terms for this file may be |
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11 | * found in the file LICENSE in this distribution or at |
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12 | * http://www.rtems.com/license/LICENSE. |
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13 | * |
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14 | * Ported to ERC32 implementation of the SPARC by On-Line Applications |
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15 | * Research Corporation (OAR) under contract to the European Space |
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16 | * Agency (ESA). |
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17 | * |
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18 | * ERC32 modifications of respective RTEMS file: COPYRIGHT (c) 1995. |
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19 | * European Space Agency. |
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20 | * |
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21 | * $Id$ |
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22 | */ |
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23 | |
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24 | /* must be identical to STACK_SIZE in start.S */ |
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25 | #define STACK_SIZE 16 * 1024 |
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26 | |
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27 | #include <string.h> |
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28 | |
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29 | #include <bsp.h> |
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30 | #include <rtems/libio.h> |
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31 | #include <rtems/libcsupport.h> |
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32 | |
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33 | /* |
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34 | * The original table from the application and our copy of it with |
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35 | * some changes. |
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36 | */ |
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37 | |
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38 | extern rtems_configuration_table Configuration; |
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39 | rtems_configuration_table BSP_Configuration; |
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40 | |
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41 | rtems_cpu_table Cpu_table; |
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42 | |
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43 | /* |
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44 | * Tells us where to put the workspace in case remote debugger is present. |
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45 | */ |
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46 | |
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47 | extern rtems_unsigned32 rdb_start; |
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48 | |
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49 | /* |
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50 | * Amount to increment itimer by each pass |
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51 | * It is a variable instead of a #define to allow the 'looptest' |
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52 | * script to bump it without recompiling rtems |
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53 | * |
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54 | * NOTE: This is based on the PA-RISC simulator. I don't know if we |
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55 | * can actually pull this trick on the SPARC simulator. |
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56 | */ |
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57 | |
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58 | rtems_unsigned32 CPU_SPARC_CLICKS_PER_TICK; |
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59 | |
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60 | #if SIMSPARC_FAST_IDLE |
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61 | |
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62 | /* |
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63 | * Many of the tests are very slow on the simulator because they have |
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64 | * have 5 second delays hardwired in. |
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65 | * |
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66 | * Try to speed those tests up by speeding up the clock when in the idle task. |
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67 | * |
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68 | * NOTE: At the current setting, 5 second delays in the tests take |
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69 | * approximately 5 seconds of wall time. |
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70 | */ |
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71 | |
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72 | rtems_extension fast_idle_switch_hook( |
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73 | rtems_tcb *current_task, |
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74 | rtems_tcb *heir_task |
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75 | ) |
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76 | { |
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77 | static rtems_unsigned32 normal_clock = ~0; |
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78 | static rtems_unsigned32 fast_clock; |
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79 | |
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80 | /* init our params on first call */ |
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81 | if (normal_clock == ~0) |
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82 | { |
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83 | normal_clock = CPU_SPARC_CLICKS_PER_TICK; |
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84 | fast_clock = CPU_SPARC_CLICKS_PER_TICK / 0x08; |
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85 | if (fast_clock == 0) /* handle pathological case */ |
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86 | fast_clock++; |
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87 | } |
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88 | |
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89 | /* |
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90 | * Run the clock faster when idle is in place. |
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91 | */ |
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92 | |
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93 | if (heir_task == _Thread_Idle) |
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94 | CPU_SPARC_CLICKS_PER_TICK = fast_clock; |
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95 | else if (current_task == _Thread_Idle) |
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96 | CPU_SPARC_CLICKS_PER_TICK = normal_clock; |
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97 | } |
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98 | |
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99 | #endif |
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100 | |
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101 | /* |
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102 | * Use the shared implementations of the following routines |
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103 | */ |
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104 | |
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105 | void bsp_postdriver_hook(void); |
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106 | void bsp_libc_init( void *, unsigned32, int ); |
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107 | extern void bsp_spurious_initialize(); |
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108 | |
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109 | /* |
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110 | * bsp_pretasking_hook |
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111 | * |
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112 | * BSP pretasking hook. Called just before drivers are initialized. |
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113 | * Used to setup libc and install any BSP extensions. |
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114 | */ |
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115 | |
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116 | void bsp_pretasking_hook(void) |
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117 | { |
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118 | extern int end; |
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119 | rtems_unsigned32 heap_start; |
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120 | rtems_unsigned32 heap_size; |
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121 | |
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122 | heap_start = (rtems_unsigned32) &end; |
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123 | if (heap_start & (CPU_ALIGNMENT-1)) |
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124 | heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1); |
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125 | |
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126 | heap_size = BSP_Configuration.work_space_start - (void *)&end - STACK_SIZE; |
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127 | heap_size &= 0xfffffff0; /* keep it as a multiple of 16 bytes */ |
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128 | |
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129 | bsp_libc_init((void *) heap_start, heap_size, 0); |
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130 | |
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131 | |
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132 | #if SIMSPARC_FAST_IDLE |
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133 | /* |
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134 | * Install the fast idle task switch extension |
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135 | * |
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136 | * On MP systems, might not want to do this; it confuses at least |
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137 | * one test (mp06) on the PA-RISC simulator |
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138 | */ |
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139 | |
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140 | #if 0 |
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141 | if (BSP_Configuration.User_multiprocessing_table == 0) |
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142 | #endif |
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143 | { |
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144 | rtems_extensions_table fast_idle_extension; |
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145 | rtems_id extension_id; |
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146 | rtems_status_code rc; |
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147 | |
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148 | memset(&fast_idle_extension, 0, sizeof(fast_idle_extension)); |
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149 | |
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150 | fast_idle_extension.thread_switch = fast_idle_switch_hook; |
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151 | |
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152 | rc = rtems_extension_create( |
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153 | rtems_build_name('F', 'D', 'L', 'E'), |
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154 | &fast_idle_extension, |
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155 | &extension_id |
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156 | ); |
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157 | if (rc != RTEMS_SUCCESSFUL) |
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158 | rtems_fatal_error_occurred(rc); |
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159 | } |
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160 | #endif |
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161 | |
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162 | #ifdef RTEMS_DEBUG |
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163 | rtems_debug_enable( RTEMS_DEBUG_ALL_MASK ); |
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164 | #endif |
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165 | |
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166 | bsp_spurious_initialize(); |
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167 | } |
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168 | |
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169 | /* |
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170 | * bsp_start |
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171 | * |
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172 | * This routine does the bulk of the system initialization. |
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173 | */ |
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174 | |
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175 | void bsp_start( void ) |
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176 | { |
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177 | unsigned char *work_space_start; |
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178 | |
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179 | /* |
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180 | * Set up our hooks |
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181 | * Make sure libc_init is done before drivers initialized so that |
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182 | * they can use atexit() |
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183 | */ |
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184 | |
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185 | Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */ |
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186 | Cpu_table.postdriver_hook = bsp_postdriver_hook; |
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187 | |
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188 | /* |
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189 | * SIS does zero out memory BUT only when IT begins execution. Thus |
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190 | * if we want to have a clean slate in the workspace each time we |
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191 | * begin execution of OUR application, then we must zero the workspace. |
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192 | */ |
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193 | Cpu_table.do_zero_of_workspace = TRUE; |
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194 | |
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195 | /* |
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196 | * This should be enough interrupt stack. |
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197 | */ |
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198 | |
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199 | Cpu_table.interrupt_stack_size = CONFIGURE_INTERRUPT_STACK_MEMORY; |
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200 | |
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201 | work_space_start = (unsigned char *)rdb_start; |
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202 | work_space_start -= BSP_Configuration.work_space_size; |
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203 | |
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204 | if ( work_space_start <= (unsigned char *)&end ) { |
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205 | DEBUG_puts( "bspstart: Not enough RAM!!!\n" ); |
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206 | BSP_fatal_return(); |
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207 | } |
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208 | |
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209 | BSP_Configuration.work_space_start = work_space_start; |
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210 | |
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211 | #if SIMSPARC_FAST_IDLE |
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212 | /* |
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213 | * Add 1 extension for fast idle |
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214 | */ |
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215 | |
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216 | BSP_Configuration.maximum_extensions++; |
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217 | #endif |
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218 | |
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219 | /* |
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220 | * Add 1 extension for MPCI_fatal |
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221 | */ |
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222 | |
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223 | if (BSP_Configuration.User_multiprocessing_table) |
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224 | BSP_Configuration.maximum_extensions++; |
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225 | |
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226 | /* |
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227 | * Set the "clicks per tick" for the simulator |
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228 | * used by XXX/clock/clock.c to schedule interrupts |
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229 | */ |
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230 | |
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231 | CPU_SPARC_CLICKS_PER_TICK = BSP_Configuration.microseconds_per_tick; |
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232 | } |
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