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 | * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. |
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13 | * On-Line Applications Research Corporation (OAR). |
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14 | * All rights assigned to U.S. Government, 1994. |
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15 | * |
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16 | * This material may be reproduced by or for the U.S. Government pursuant |
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17 | * to the copyright license under the clause at DFARS 252.227-7013. This |
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18 | * notice must appear in all copies of this file and its derivatives. |
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19 | * |
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20 | * $Id$ |
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21 | */ |
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22 | |
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23 | #include <rtems.h> |
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24 | #include <bsp.h> |
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25 | #include <shm.h> |
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26 | #include <libcsupport.h> |
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27 | |
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28 | /* |
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29 | * The original table from the application and our copy of it with |
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30 | * some changes. |
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31 | */ |
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32 | |
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33 | extern rtems_configuration_table Configuration; |
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34 | |
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35 | rtems_configuration_table BSP_Configuration; |
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36 | |
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37 | rtems_cpu_table Cpu_table; |
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38 | |
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39 | /* Initialize whatever libc we are using |
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40 | * called from postdriver hook |
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41 | */ |
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42 | |
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43 | void bsp_libc_init() |
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44 | { |
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45 | extern int end; |
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46 | rtems_unsigned32 heap_start; |
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47 | |
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48 | heap_start = (rtems_unsigned32) &end; |
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49 | if (heap_start & (CPU_ALIGNMENT-1)) |
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50 | heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1); |
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51 | |
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52 | /* |
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53 | * The last parameter to RTEMS_Malloc_Initialize is the "chunk" |
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54 | * size which a multiple of will be requested on each sbrk() |
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55 | * call by malloc(). A value of 0 indicates that sbrk() should |
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56 | * not be called to extend the heap. |
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57 | */ |
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58 | |
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59 | RTEMS_Malloc_Initialize((void *) heap_start, 64 * 1024, 0); |
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60 | |
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61 | /* |
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62 | * Set up for the libc handling. |
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63 | */ |
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64 | |
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65 | if (BSP_Configuration.ticks_per_timeslice > 0) |
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66 | libc_init(1); /* reentrant if possible */ |
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67 | else |
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68 | libc_init(0); /* non-reentrant */ |
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69 | |
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70 | /* |
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71 | * Initialize the stack bounds checker |
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72 | */ |
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73 | |
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74 | #ifdef STACK_CHECKER_ON |
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75 | Stack_check_Initialize(); |
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76 | #endif |
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77 | } |
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78 | |
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79 | int bsp_start( |
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80 | int argc, |
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81 | char **argv, |
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82 | char **environp |
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83 | ) |
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84 | { |
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85 | /* |
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86 | * Allocate the memory for the RTEMS Work Space. This can come from |
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87 | * a variety of places: hard coded address, malloc'ed from outside |
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88 | * RTEMS world (e.g. simulator or primitive memory manager), or (as |
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89 | * typically done by stock BSPs) by subtracting the required amount |
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90 | * of work space from the last physical address on the CPU board. |
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91 | */ |
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92 | |
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93 | /* |
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94 | * Copy the Configuration Table .. so we can change it |
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95 | */ |
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96 | |
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97 | BSP_Configuration = Configuration; |
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98 | |
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99 | /* |
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100 | * Add 1 region for the RTEMS Malloc |
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101 | */ |
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102 | |
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103 | BSP_Configuration.maximum_regions++; |
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104 | |
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105 | /* |
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106 | * Add 1 extension for newlib libc |
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107 | */ |
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108 | |
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109 | #ifdef RTEMS_NEWLIB |
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110 | BSP_Configuration.maximum_extensions++; |
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111 | #endif |
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112 | |
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113 | /* |
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114 | * Add 1 extension for newlib libc |
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115 | */ |
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116 | |
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117 | #ifdef RTEMS_NEWLIB |
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118 | BSP_Configuration.maximum_extensions++; |
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119 | #endif |
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120 | |
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121 | /* |
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122 | * Need to "allocate" the memory for the RTEMS Workspace and |
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123 | * tell the RTEMS configuration where it is. This memory is |
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124 | * not malloc'ed. It is just "pulled from the air". |
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125 | */ |
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126 | |
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127 | BSP_Configuration.work_space_start = (void *) 0; |
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128 | |
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129 | /* |
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130 | * initialize the CPU table for this BSP |
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131 | */ |
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132 | |
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133 | /* |
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134 | * we do not use the pretasking_hook |
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135 | */ |
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136 | |
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137 | Cpu_table.pretasking_hook = NULL; |
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138 | |
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139 | Cpu_table.predriver_hook = bsp_libc_init; /* RTEMS resources available */ |
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140 | |
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141 | Cpu_table.postdriver_hook = NULL; |
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142 | |
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143 | Cpu_table.idle_task = NULL; /* do not override system IDLE task */ |
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144 | |
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145 | Cpu_table.do_zero_of_workspace = TRUE; |
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146 | |
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147 | Cpu_table.interrupt_stack_size = 4096; |
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148 | |
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149 | Cpu_table.extra_system_initialization_stack = 0; |
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150 | |
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151 | /* |
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152 | * Don't forget the other CPU Table entries. |
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153 | */ |
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154 | |
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155 | /* |
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156 | * Start RTEMS |
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157 | */ |
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158 | |
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159 | rtems_initialize_executive( &BSP_Configuration, &Cpu_table ); |
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160 | |
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161 | bsp_cleanup(); |
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162 | |
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163 | return 0; |
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164 | } |
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