1 | /* bsp_start() |
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2 | * |
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3 | * This routine starts the application. It includes application, |
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4 | * board, and monitor specific initialization and configuration. |
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5 | * The generic CPU dependent initialization has been performed |
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6 | * before this routine is invoked. |
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7 | * |
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8 | * INPUT: NONE |
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9 | * |
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10 | * OUTPUT: NONE |
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11 | * |
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12 | * Authors: Ralf Corsepius (corsepiu@faw.uni-ulm.de) and |
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13 | * Bernd Becker (becker@faw.uni-ulm.de) |
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14 | * |
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15 | * COPYRIGHT (c) 1997-1998, FAW Ulm, Germany |
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16 | * |
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17 | * This program is distributed in the hope that it will be useful, |
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18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
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20 | * |
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21 | * |
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22 | * COPYRIGHT (c) 1998. |
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23 | * On-Line Applications Research Corporation (OAR). |
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24 | * Copyright assigned to U.S. Government, 1994. |
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25 | * |
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26 | * The license and distribution terms for this file may be |
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27 | * found in the file LICENSE in this distribution or at |
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28 | * http://www.OARcorp.com/rtems/license.html. |
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29 | * |
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30 | * $Id$ |
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31 | */ |
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32 | |
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33 | #include <bsp.h> |
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34 | #include <rtems/libio.h> |
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35 | |
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36 | #include <libcsupport.h> |
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37 | |
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38 | #include <string.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 | /* |
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45 | * The original table from the application and our copy of it with |
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46 | * some changes. |
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47 | */ |
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48 | |
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49 | extern rtems_configuration_table Configuration; |
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50 | |
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51 | rtems_configuration_table BSP_Configuration; |
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52 | |
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53 | rtems_cpu_table Cpu_table; |
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54 | |
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55 | char *rtems_progname; |
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56 | |
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57 | /* Initialize whatever libc we are using |
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58 | * called from postdriver hook |
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59 | */ |
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60 | |
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61 | |
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62 | void bsp_libc_init() |
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63 | { |
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64 | /* |
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65 | * The last parameter to RTEMS_Malloc_Initialize is the "chunk" |
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66 | * size which a multiple of will be requested on each sbrk() |
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67 | * call by malloc(). A value of 0 indicates that sbrk() should |
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68 | * not be called to extend the heap. |
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69 | */ |
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70 | |
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71 | RTEMS_Malloc_Initialize(&HeapStart, sizeof(unsigned32) * (&HeapEnd - &HeapStart), 0); |
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72 | |
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73 | /* |
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74 | * Init the RTEMS libio facility to provide UNIX-like system |
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75 | * calls for use by newlib (ie: provide __rtems_open, __rtems_close, etc) |
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76 | * Uses malloc() to get area for the iops, so must be after malloc init |
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77 | */ |
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78 | |
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79 | rtems_libio_init(); |
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80 | |
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81 | /* |
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82 | * Set up for the libc handling. |
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83 | */ |
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84 | |
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85 | if (BSP_Configuration.ticks_per_timeslice > 0) |
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86 | libc_init(1); /* reentrant if possible */ |
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87 | else |
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88 | libc_init(0); /* non-reentrant */ |
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89 | } |
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90 | |
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91 | /* |
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92 | * Function: bsp_pretasking_hook |
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93 | * |
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94 | * Description: |
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95 | * BSP pretasking hook. Called just before drivers are initialized. |
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96 | * Used to setup libc and install any BSP extensions. |
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97 | * |
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98 | * NOTES: |
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99 | * Must not use libc (to do io) from here, since drivers are |
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100 | * not yet initialized. |
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101 | * |
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102 | */ |
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103 | |
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104 | void |
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105 | bsp_pretasking_hook(void) |
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106 | { |
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107 | bsp_libc_init(); |
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108 | |
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109 | #ifdef STACK_CHECKER_ON |
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110 | /* |
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111 | * Initialize the stack bounds checker |
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112 | * We can either turn it on here or from the app. |
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113 | */ |
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114 | |
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115 | Stack_check_Initialize(); |
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116 | #endif |
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117 | |
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118 | #ifdef RTEMS_DEBUG |
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119 | rtems_debug_enable( RTEMS_DEBUG_ALL_MASK ); |
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120 | #endif |
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121 | } |
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122 | |
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123 | /* |
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124 | * Use the shared bsp_postdriver_hook() implementation |
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125 | */ |
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126 | |
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127 | void bsp_postdriver_hook(void); |
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128 | |
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129 | |
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130 | void bsp_start(void) |
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131 | { |
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132 | /* |
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133 | For real boards you need to setup the hardware |
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134 | and need to copy the vector table from rom to ram. |
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135 | |
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136 | Depending on the board this can ether be done from inside the rom |
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137 | startup code, rtems startup code or here. |
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138 | */ |
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139 | |
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140 | /* |
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141 | * Allocate the memory for the RTEMS Work Space. This can come from |
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142 | * a variety of places: hard coded address, malloc'ed from outside |
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143 | * RTEMS world (e.g. simulator or primitive memory manager), or (as |
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144 | * typically done by stock BSPs) by subtracting the required amount |
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145 | * of work space from the last physical address on the CPU board. |
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146 | */ |
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147 | |
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148 | /* |
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149 | * Copy the Configuration Table .. so we can change it |
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150 | */ |
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151 | |
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152 | BSP_Configuration = Configuration; |
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153 | |
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154 | /* |
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155 | * Need to "allocate" the memory for the RTEMS Workspace and |
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156 | * tell the RTEMS configuration where it is. This memory is |
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157 | * not malloc'ed. It is just "pulled from the air". |
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158 | */ |
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159 | |
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160 | BSP_Configuration.work_space_start = (void *) &WorkSpaceStart ; |
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161 | BSP_Configuration.work_space_size = |
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162 | (unsigned32) &WorkSpaceEnd - |
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163 | (unsigned32) &WorkSpaceStart ; |
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164 | |
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165 | /* |
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166 | * initialize the CPU table for this BSP |
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167 | */ |
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168 | |
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169 | #if ( CPU_ALLOCATE_INTERRUPT_STACK == FALSE ) |
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170 | _CPU_Interrupt_stack_low = &CPU_Interrupt_stack_low ; |
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171 | _CPU_Interrupt_stack_high = &CPU_Interrupt_stack_high ; |
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172 | |
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173 | /* This isn't used anywhere */ |
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174 | Cpu_table.interrupt_stack_size = |
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175 | (unsigned32) (&CPU_Interrupt_stack_high) - |
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176 | (unsigned32) (&CPU_Interrupt_stack_low) ; |
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177 | #endif |
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178 | |
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179 | |
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180 | Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */ |
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181 | |
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182 | Cpu_table.predriver_hook = NULL; |
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183 | |
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184 | Cpu_table.postdriver_hook = bsp_postdriver_hook; |
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185 | |
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186 | Cpu_table.idle_task = NULL; /* do not override system IDLE task */ |
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187 | |
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188 | Cpu_table.do_zero_of_workspace = TRUE; |
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189 | |
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190 | #if ( CPU_ALLOCATE_INTERRUPT_STACK == TRUE ) |
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191 | Cpu_table.interrupt_stack_size = 4096; |
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192 | #endif |
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193 | |
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194 | Cpu_table.extra_mpci_receive_server_stack = 0; |
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195 | |
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196 | /* |
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197 | * Don't forget the other CPU Table entries. |
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198 | */ |
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199 | |
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200 | /* |
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201 | * Tell libio how many fd's we want and allow it to tweak config |
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202 | */ |
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203 | |
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204 | rtems_libio_config(&BSP_Configuration, BSP_LIBIO_MAX_FDS); |
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205 | } |
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