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 "cpu.h" |
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26 | #include "libcsupport.h" |
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27 | |
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28 | unsigned char *duart_base; |
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29 | extern struct duart_regs duart_info; |
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30 | |
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31 | #define DELAY 5000 |
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32 | |
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33 | void led_putnum(); |
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34 | |
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35 | /* |
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36 | * The original table from the application and our copy of it with |
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37 | * some changes. |
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38 | */ |
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39 | |
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40 | extern rtems_configuration_table Configuration; |
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41 | rtems_configuration_table BSP_Configuration; |
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42 | |
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43 | rtems_cpu_table Cpu_table; |
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44 | |
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45 | /* Initialize whatever libc we are using |
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46 | * called from postdriver hook |
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47 | */ |
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48 | |
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49 | void bsp_libc_init() |
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50 | { |
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51 | extern int end; |
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52 | rtems_unsigned32 heap_start; |
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53 | |
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54 | heap_start = (rtems_unsigned32) &end; |
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55 | if (heap_start & (CPU_ALIGNMENT-1)) |
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56 | heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1); |
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57 | |
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58 | /* Create 64 KByte memory region for RTEMS executive */ |
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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 | |
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80 | int bsp_start( |
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81 | int argc, |
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82 | char **argv, |
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83 | char **environp |
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84 | ) |
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85 | { |
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86 | m68k_isr *monitors_vector_table; |
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87 | int index; |
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88 | |
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89 | duart_base = (unsigned char *)DUART_ADDR; |
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90 | |
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91 | /* |
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92 | * Set the VBR here to the monitor's default. |
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93 | */ |
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94 | |
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95 | monitors_vector_table = (m68k_isr *)0; /* This is where |
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96 | you set vector base |
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97 | register = 0 */ |
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98 | m68k_set_vbr( monitors_vector_table ); |
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99 | |
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100 | /* The vector interrupt table for the 680x0 is in appendix B-2 |
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101 | of the M68000 Family Programmer's reference table */ |
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102 | for ( index=2 ; index<=255 ; index++ ) |
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103 | M68Kvec[ index ] = monitors_vector_table[ 32 ]; |
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104 | |
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105 | |
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106 | M68Kvec[ 2 ] = monitors_vector_table[ 2 ]; /* bus error vector */ |
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107 | M68Kvec[ 4 ] = monitors_vector_table[ 4 ]; /* breakpoints vector */ |
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108 | M68Kvec[ 9 ] = monitors_vector_table[ 9 ]; /* trace vector */ |
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109 | |
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110 | /* |
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111 | * Set the VBR here if you do not want to use the monitor's vector table. |
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112 | */ |
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113 | |
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114 | m68k_set_vbr( &M68Kvec ); |
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115 | |
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116 | m68k_enable_caching(); |
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117 | |
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118 | /* |
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119 | * we only use a hook to get the C library initialized. |
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120 | */ |
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121 | |
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122 | Cpu_table.pretasking_hook = NULL; |
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123 | |
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124 | Cpu_table.predriver_hook = bsp_libc_init; /* RTEMS resources available */ |
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125 | |
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126 | Cpu_table.postdriver_hook = NULL; |
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127 | |
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128 | Cpu_table.idle_task = NULL; /* do not override system IDLE task */ |
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129 | |
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130 | Cpu_table.do_zero_of_workspace = TRUE; |
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131 | |
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132 | Cpu_table.interrupt_vector_table = (m68k_isr *) &M68Kvec; |
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133 | |
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134 | Cpu_table.interrupt_stack_size = 4096; |
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135 | |
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136 | Cpu_table.extra_system_initialization_stack = 0; |
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137 | |
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138 | /* |
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139 | * Copy the table |
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140 | */ |
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141 | |
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142 | BSP_Configuration = Configuration; |
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143 | |
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144 | BSP_Configuration.work_space_start = (void *) |
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145 | (RAM_END - BSP_Configuration.work_space_size); |
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146 | |
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147 | /* |
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148 | * Add 1 region for the RTEMS Malloc |
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149 | */ |
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150 | |
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151 | BSP_Configuration.maximum_regions++; |
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152 | |
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153 | /* |
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154 | * Add 1 extension for newlib libc |
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155 | */ |
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156 | |
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157 | #ifdef RTEMS_NEWLIB |
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158 | BSP_Configuration.maximum_extensions++; |
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159 | #endif |
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160 | |
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161 | /* |
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162 | * Add another extension if using the stack checker |
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163 | */ |
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164 | |
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165 | #ifdef STACK_CHECKER_ON |
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166 | BSP_Configuration.maximum_extensions++; |
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167 | #endif |
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168 | |
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169 | /* led_putnum('e'); * for debugging purposes only */ |
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170 | rtems_initialize_executive( &BSP_Configuration, &Cpu_table );/* does not return */ |
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171 | |
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172 | /* Clock_exit is done as an atexit() function */ |
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173 | |
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174 | return 0; |
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175 | } |
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