1 | /* |
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2 | * @(#)bspstart.c 1.7 - 95/04/07 |
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3 | * |
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4 | */ |
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5 | |
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6 | /* bsp_start() |
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7 | * |
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8 | * This routine starts the application. It includes application, |
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9 | * board, and monitor specific initialization and configuration. |
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10 | * The generic CPU dependent initialization has been performed |
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11 | * before this routine is invoked. |
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12 | * |
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13 | * Called by RTEMS::RTEMS constructor in startup-ctor.cc |
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14 | * |
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15 | * INPUT: NONE |
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16 | * |
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17 | * OUTPUT: NONE |
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18 | * |
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19 | * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. |
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20 | * On-Line Applications Research Corporation (OAR). |
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21 | * All rights assigned to U.S. Government, 1994. |
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22 | * |
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23 | * This material may be reproduced by or for the U.S. Government pursuant |
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24 | * to the copyright license under the clause at DFARS 252.227-7013. This |
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25 | * notice must appear in all copies of this file and its derivatives. |
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26 | * |
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27 | * $Id$ |
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28 | */ |
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29 | |
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30 | #include <rtems.h> |
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31 | |
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32 | #include <stdio.h> |
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33 | #include <stdlib.h> |
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34 | #include <fcntl.h> |
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35 | #include <unistd.h> |
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36 | |
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37 | #include <bsp.h> |
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38 | #include <libcsupport.h> |
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39 | |
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40 | #ifdef STACK_CHECKER_ON |
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41 | #include <stackchk.h> |
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42 | #endif |
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43 | |
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44 | extern rtems_configuration_table Configuration; |
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45 | |
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46 | /* |
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47 | * A copy of the configuration table from the application |
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48 | * with some changes applied to it. |
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49 | */ |
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50 | |
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51 | rtems_configuration_table BSP_Configuration; |
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52 | rtems_multiprocessing_table BSP_Multiprocessing; |
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53 | rtems_cpu_table Cpu_table; |
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54 | rtems_unsigned32 bsp_isr_level; |
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55 | rtems_unsigned32 Heap_size; |
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56 | int rtems_argc; |
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57 | char **rtems_argv; |
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58 | char **rtems_envp; |
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59 | |
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60 | /* |
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61 | * May be overridden by RTEMS_WORKSPACE_SIZE and RTEMS_HEAPSPACE_SIZE |
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62 | * environment variables; see below. |
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63 | */ |
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64 | |
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65 | #define DEFAULT_WORKSPACE_SIZE (WORKSPACE_MB * (1024 * 1024)) |
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66 | #define DEFAULT_HEAPSPACE_SIZE (HEAPSPACE_MB * (1024 * 1024)) |
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67 | |
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68 | /* |
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69 | * Amount to increment itimer by each pass |
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70 | * It is a variable instead of a #define to allow the 'looptest' |
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71 | * script to bump it without recompiling rtems |
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72 | */ |
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73 | |
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74 | rtems_unsigned32 CPU_CLICKS_PER_TICK; |
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75 | |
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76 | /* |
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77 | * Function: bsp_libc_init |
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78 | * Created: 94/12/6 |
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79 | * |
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80 | * Description: |
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81 | * Initialize whatever libc we are using |
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82 | * called from bsp_postdriver_hook |
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83 | * |
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84 | * |
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85 | * Parameters: |
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86 | * none |
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87 | * |
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88 | * Returns: |
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89 | * none. |
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90 | * |
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91 | * Side Effects: |
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92 | * |
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93 | * |
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94 | * Notes: |
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95 | * |
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96 | * Deficiencies/ToDo: |
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97 | * |
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98 | * |
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99 | */ |
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100 | |
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101 | void |
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102 | bsp_libc_init(void) |
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103 | { |
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104 | void *heap_start; |
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105 | |
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106 | if (getenv("RTEMS_HEAPSPACE_SIZE")) |
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107 | Heap_size = strtol(getenv("RTEMS_HEAPSPACE_SIZE"), 0, 0); |
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108 | else |
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109 | Heap_size = DEFAULT_HEAPSPACE_SIZE; |
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110 | |
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111 | heap_start = 0; |
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112 | |
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113 | RTEMS_Malloc_Initialize((void *)heap_start, Heap_size, 1024 * 1024); |
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114 | |
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115 | libc_init(1); |
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116 | } |
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117 | |
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118 | |
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119 | /* |
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120 | * Function: bsp_pretasking_hook |
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121 | * Created: 95/03/10 |
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122 | * |
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123 | * Description: |
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124 | * BSP pretasking hook. Called just before drivers are initialized. |
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125 | * Used to setup libc and install any BSP extensions. |
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126 | * |
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127 | * Parameters: |
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128 | * none |
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129 | * |
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130 | * Returns: |
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131 | * nada |
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132 | * |
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133 | * Side Effects: |
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134 | * installs a few extensions |
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135 | * |
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136 | * Notes: |
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137 | * Must not use libc (to do io) from here, since drivers are |
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138 | * not yet initialized. |
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139 | * |
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140 | * Deficiencies/ToDo: |
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141 | * |
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142 | * |
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143 | */ |
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144 | |
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145 | void |
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146 | bsp_pretasking_hook(void) |
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147 | { |
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148 | bsp_libc_init(); |
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149 | |
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150 | #ifdef STACK_CHECKER_ON |
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151 | /* |
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152 | * Initialize the stack bounds checker |
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153 | * We can either turn it on here or from the app. |
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154 | */ |
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155 | |
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156 | Stack_check_Initialize(); |
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157 | #endif |
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158 | |
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159 | #ifdef RTEMS_DEBUG |
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160 | rtems_debug_enable( RTEMS_DEBUG_ALL_MASK ); |
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161 | #endif |
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162 | } |
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163 | |
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164 | /* |
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165 | * Function: bsp_start |
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166 | * Created: 94/12/6 |
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167 | * |
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168 | * Description: |
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169 | * called by crt0 as our "main" equivalent |
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170 | * |
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171 | * |
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172 | * |
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173 | * Parameters: |
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174 | * |
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175 | * |
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176 | * Returns: |
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177 | * |
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178 | * |
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179 | * Side Effects: |
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180 | * |
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181 | * |
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182 | * Notes: |
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183 | * |
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184 | * |
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185 | * Deficiencies/ToDo: |
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186 | * |
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187 | * |
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188 | */ |
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189 | |
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190 | void |
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191 | bsp_start(void) |
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192 | { |
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193 | unsigned32 workspace_ptr; |
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194 | |
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195 | /* |
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196 | * Copy the table |
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197 | */ |
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198 | |
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199 | BSP_Configuration = Configuration; |
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200 | |
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201 | /* |
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202 | * If the node number is -1 then the application better provide |
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203 | * it through environment variables RTEMS_NODE. |
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204 | * Ditto for RTEMS_MAXIMUM_NODES |
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205 | */ |
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206 | |
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207 | if (BSP_Configuration.User_multiprocessing_table) { |
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208 | char *p; |
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209 | |
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210 | /* make a copy for possible editing */ |
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211 | BSP_Multiprocessing = *BSP_Configuration.User_multiprocessing_table; |
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212 | BSP_Configuration.User_multiprocessing_table = &BSP_Multiprocessing; |
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213 | |
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214 | if (BSP_Multiprocessing.node == -1) |
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215 | { |
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216 | p = getenv("RTEMS_NODE"); |
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217 | BSP_Multiprocessing.node = p ? atoi(p) : 1; |
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218 | } |
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219 | |
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220 | /* If needed provide maximum_nodes also */ |
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221 | if (BSP_Multiprocessing.maximum_nodes == -1) |
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222 | { |
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223 | p = getenv("RTEMS_MAXIMUM_NODES"); |
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224 | BSP_Multiprocessing.maximum_nodes = p ? atoi(p) : 1; |
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225 | } |
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226 | } |
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227 | |
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228 | /* |
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229 | * Set cpu_number to accurately reflect our cpu number |
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230 | */ |
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231 | |
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232 | if (BSP_Configuration.User_multiprocessing_table) |
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233 | cpu_number = BSP_Configuration.User_multiprocessing_table->node - 1; |
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234 | else |
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235 | cpu_number = 0; |
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236 | |
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237 | if (getenv("RTEMS_WORKSPACE_SIZE")) |
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238 | BSP_Configuration.work_space_size = |
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239 | strtol(getenv("RTEMS_WORKSPACE_SIZE"), 0, 0); |
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240 | else |
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241 | BSP_Configuration.work_space_size = DEFAULT_WORKSPACE_SIZE; |
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242 | |
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243 | /* |
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244 | * Allocate workspace memory, ensuring it is properly aligned |
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245 | */ |
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246 | |
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247 | workspace_ptr = |
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248 | (unsigned32) sbrk(BSP_Configuration.work_space_size + CPU_ALIGNMENT); |
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249 | workspace_ptr += CPU_ALIGNMENT - 1; |
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250 | workspace_ptr &= ~(CPU_ALIGNMENT - 1); |
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251 | |
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252 | BSP_Configuration.work_space_start = (void *) workspace_ptr; |
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253 | |
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254 | /* |
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255 | * Set up our hooks |
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256 | * Make sure libc_init is done before drivers init'd so that |
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257 | * they can use atexit() |
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258 | */ |
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259 | |
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260 | Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */ |
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261 | |
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262 | Cpu_table.predriver_hook = NULL; |
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263 | |
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264 | Cpu_table.postdriver_hook = NULL; |
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265 | |
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266 | Cpu_table.idle_task = NULL; /* do not override system IDLE task */ |
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267 | |
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268 | /* |
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269 | * Don't zero out the workspace since it is in the BSS under UNIX. |
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270 | */ |
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271 | |
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272 | Cpu_table.do_zero_of_workspace = FALSE; |
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273 | |
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274 | /* |
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275 | * XXX; interrupt stack not currently used, so this doesn't matter |
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276 | */ |
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277 | |
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278 | Cpu_table.interrupt_stack_size = (12 * 1024); |
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279 | |
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280 | Cpu_table.extra_system_initialization_stack = 0; |
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281 | |
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282 | /* |
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283 | * Add 1 region for RTEMS Malloc |
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284 | */ |
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285 | |
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286 | BSP_Configuration.maximum_regions++; |
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287 | |
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288 | #ifdef RTEMS_NEWLIB |
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289 | /* |
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290 | * Add 1 extension for newlib libc |
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291 | */ |
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292 | |
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293 | BSP_Configuration.maximum_extensions++; |
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294 | #endif |
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295 | |
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296 | #ifdef STACK_CHECKER_ON |
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297 | /* |
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298 | * Add 1 extension for stack checker |
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299 | */ |
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300 | |
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301 | BSP_Configuration.maximum_extensions++; |
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302 | #endif |
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303 | |
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304 | /* |
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305 | * Add 1 extension for MPCI_fatal |
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306 | */ |
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307 | |
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308 | if (BSP_Configuration.User_multiprocessing_table) |
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309 | BSP_Configuration.maximum_extensions++; |
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310 | |
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311 | CPU_CLICKS_PER_TICK = 1; |
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312 | |
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313 | /* |
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314 | * Start most of RTEMS |
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315 | * main() will start the rest |
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316 | */ |
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317 | |
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318 | bsp_isr_level = rtems_initialize_executive_early( |
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319 | &BSP_Configuration, |
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320 | &Cpu_table |
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321 | ); |
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322 | } |
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