1 | /* |
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2 | * This routine 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 this routine is invoked. |
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6 | * |
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7 | * Called by RTEMS::RTEMS constructor in startup-ctor.cc |
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8 | * |
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9 | * COPYRIGHT (c) 1989-1999. |
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10 | * On-Line Applications Research Corporation (OAR). |
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11 | * |
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12 | * The license and distribution terms for this file may be |
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13 | * found in the file LICENSE in this distribution or at |
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14 | * http://www.rtems.com/license/LICENSE. |
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15 | * |
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16 | * $Id$ |
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17 | */ |
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18 | |
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19 | #include <stdio.h> |
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20 | #include <stdlib.h> |
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21 | #include <unistd.h> |
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22 | |
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23 | #include <bsp.h> |
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24 | #include <rtems/libcsupport.h> |
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25 | #include <rtems/libio.h> |
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26 | |
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27 | uint32_t Heap_size; |
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28 | int rtems_argc; |
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29 | char **rtems_argv; |
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30 | |
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31 | /* |
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32 | * May be overridden by RTEMS_WORKSPACE_SIZE and RTEMS_HEAPSPACE_SIZE |
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33 | * environment variables; see below. |
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34 | */ |
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35 | |
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36 | #define DEFAULT_WORKSPACE_SIZE (WORKSPACE_MB * (1024 * 1024)) |
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37 | #define DEFAULT_HEAPSPACE_SIZE (HEAPSPACE_MB * (1024 * 1024)) |
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38 | |
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39 | /* |
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40 | * Amount to increment itimer by each pass |
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41 | * It is a variable instead of a #define to allow the 'looptest' |
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42 | * script to bump it without recompiling rtems |
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43 | */ |
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44 | |
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45 | uint32_t CPU_CLICKS_PER_TICK; |
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46 | |
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47 | /* |
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48 | * Use the shared implementations of the following routines |
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49 | */ |
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50 | |
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51 | void bsp_postdriver_hook(void); |
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52 | void bsp_libc_init( void *, uint32_t, int ); |
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53 | |
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54 | /* |
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55 | * Function: bsp_pretasking_hook |
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56 | * Created: 95/03/10 |
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57 | * |
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58 | * Description: |
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59 | * BSP pretasking hook. Called just before drivers are initialized. |
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60 | * Used to setup libc and install any BSP extensions. |
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61 | * |
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62 | * NOTES: |
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63 | * Must not use libc (to do io) from here, since drivers are |
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64 | * not yet initialized. |
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65 | */ |
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66 | |
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67 | void bsp_pretasking_hook(void) |
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68 | { |
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69 | void *heap_start; |
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70 | |
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71 | if (getenv("RTEMS_HEAPSPACE_SIZE")) |
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72 | Heap_size = strtol(getenv("RTEMS_HEAPSPACE_SIZE"), 0, 0); |
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73 | else |
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74 | Heap_size = DEFAULT_HEAPSPACE_SIZE; |
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75 | |
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76 | heap_start = 0; |
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77 | |
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78 | bsp_libc_init((void *)heap_start, Heap_size, 1024 * 1024); |
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79 | |
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80 | #ifdef RTEMS_DEBUG |
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81 | rtems_debug_enable( RTEMS_DEBUG_ALL_MASK ); |
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82 | #endif |
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83 | |
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84 | /* |
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85 | * Dump malloc stats on exit... |
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86 | */ |
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87 | #if defined(RTEMS_DEBUG) |
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88 | atexit(malloc_dump); |
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89 | #endif |
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90 | } |
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91 | |
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92 | /* |
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93 | * DO NOT Use the shared bsp_postdriver_hook() implementation |
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94 | */ |
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95 | |
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96 | void bsp_postdriver_hook(void) |
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97 | { |
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98 | return; |
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99 | } |
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100 | |
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101 | /* |
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102 | * bsp_start |
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103 | * |
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104 | * This routine does the bulk of the system initialization. |
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105 | */ |
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106 | |
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107 | void bsp_start(void) |
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108 | { |
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109 | uintptr_t workspace_ptr; |
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110 | |
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111 | cpu_number = 0; |
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112 | |
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113 | #if defined(RTEMS_MULTIPROCESSING) |
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114 | /* |
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115 | * If the node number is -1 then the application better provide |
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116 | * it through environment variables RTEMS_NODE. |
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117 | * Ditto for RTEMS_MAXIMUM_NODES |
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118 | */ |
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119 | if (Configuration.User_multiprocessing_table) { |
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120 | char *p; |
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121 | |
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122 | if (Configuration.User_multiprocessing_table->node == -1) { |
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123 | p = getenv("RTEMS_NODE"); |
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124 | Configuration.User_multiprocessing_table->node = p ? atoi(p) : 1; |
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125 | } |
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126 | |
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127 | /* If needed provide maximum_nodes also */ |
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128 | if (Configuration.User_multiprocessing_table->maximum_nodes == -1) { |
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129 | p = getenv("RTEMS_MAXIMUM_NODES"); |
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130 | Configuration.User_multiprocessing_table->maximum_nodes = p ? atoi(p) : 1; |
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131 | } |
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132 | } |
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133 | |
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134 | /* |
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135 | * Set cpu_number to accurately reflect our cpu number |
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136 | */ |
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137 | if (Configuration.User_multiprocessing_table) |
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138 | cpu_number = Configuration.User_multiprocessing_table->node - 1; |
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139 | #endif |
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140 | |
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141 | if (getenv("RTEMS_WORKSPACE_SIZE")) |
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142 | rtems_configuration_get_work_space_size() = |
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143 | strtol(getenv("RTEMS_WORKSPACE_SIZE"), 0, 0); |
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144 | else |
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145 | rtems_configuration_get_work_space_size() = DEFAULT_WORKSPACE_SIZE; |
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146 | |
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147 | /* |
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148 | * Allocate workspace memory, ensuring it is properly aligned |
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149 | */ |
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150 | |
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151 | workspace_ptr = |
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152 | (uintptr_t) sbrk(rtems_configuration_get_work_space_size() + CPU_ALIGNMENT); |
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153 | workspace_ptr += CPU_ALIGNMENT - 1; |
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154 | workspace_ptr &= ~(CPU_ALIGNMENT - 1); |
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155 | |
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156 | Configuration.work_space_start = (void *) workspace_ptr; |
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157 | |
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158 | CPU_CLICKS_PER_TICK = 1; |
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159 | |
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160 | } |
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