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 | * COPYRIGHT (c) 1989-1998. |
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8 | * On-Line Applications Research Corporation (OAR). |
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9 | * Copyright assigned to U.S. Government, 1994. |
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10 | * |
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11 | * The license and distribution terms for this file may be |
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12 | * found in the file LICENSE in this distribution or at |
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13 | * http://www.OARcorp.com/rtems/license.html. |
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14 | * |
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15 | * $Id$ |
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16 | */ |
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17 | |
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18 | #include <bsp.h> |
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19 | #include <rtems/libio.h> |
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20 | |
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21 | #include <libcsupport.h> |
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22 | |
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23 | #include <string.h> |
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24 | |
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25 | #ifndef lint |
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26 | static char _sccsid[] = "@(#)bspstart.c 09/11/96 1.15\n"; |
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27 | #endif |
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28 | |
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29 | /* |
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30 | * The original table from the application and our copy of it with |
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31 | * some changes. |
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32 | */ |
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33 | |
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34 | extern rtems_configuration_table Configuration; |
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35 | |
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36 | rtems_configuration_table BSP_Configuration; |
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37 | |
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38 | rtems_cpu_table Cpu_table; |
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39 | |
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40 | char *rtems_progname; |
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41 | |
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42 | /* Initialize whatever libc we are using |
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43 | * called from postdriver hook |
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44 | */ |
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45 | |
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46 | #define HEAP_BLOCK_SIZE (16 * 1024) |
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47 | |
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48 | rtems_unsigned32 heap_size = 0; |
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49 | rtems_unsigned32 heap_start; |
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50 | |
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51 | /* |
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52 | * Use the shared implementations of the following routines |
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53 | */ |
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54 | |
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55 | void bsp_postdriver_hook(void); |
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56 | void bsp_libc_init( void *, unsigned32, int ); |
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57 | |
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58 | /* |
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59 | * Function: bsp_pretasking_hook |
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60 | * Created: 95/03/10 |
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61 | * |
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62 | * Description: |
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63 | * BSP pretasking hook. Called just before drivers are initialized. |
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64 | * Used to setup libc and install any BSP extensions. |
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65 | * |
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66 | * NOTES: |
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67 | * Must not use libc (to do io) from here, since drivers are |
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68 | * not yet initialized. |
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69 | * |
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70 | */ |
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71 | |
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72 | void bsp_pretasking_hook(void) |
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73 | { |
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74 | /* allocate a maximum of 2 megabytes for the heap */ |
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75 | heap_size = 2 * 1024 * 1024; |
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76 | |
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77 | /* allocate all remaining memory to the heap */ |
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78 | do { |
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79 | heap_size -= HEAP_BLOCK_SIZE; |
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80 | heap_start = _sysalloc( heap_size ); |
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81 | } while ( !heap_start ); |
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82 | |
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83 | if (!heap_start) |
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84 | rtems_fatal_error_occurred( heap_size ); |
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85 | |
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86 | if (heap_start & (CPU_ALIGNMENT-1)) |
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87 | heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1); |
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88 | |
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89 | |
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90 | bsp_libc_init((void *) heap_start, heap_size, 0); |
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91 | |
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92 | |
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93 | #ifdef RTEMS_DEBUG |
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94 | rtems_debug_enable( RTEMS_DEBUG_ALL_MASK ); |
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95 | #endif |
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96 | } |
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97 | |
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98 | /* |
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99 | * bsp_start |
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100 | * |
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101 | * This routine does the bulk of the system initialization. |
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102 | */ |
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103 | |
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104 | int bsp_start( |
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105 | int argc, |
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106 | char **argv, |
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107 | char **environp |
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108 | ) |
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109 | { |
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110 | if ((argc > 0) && argv && argv[0]) |
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111 | rtems_progname = argv[0]; |
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112 | else |
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113 | rtems_progname = "RTEMS"; |
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114 | |
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115 | /* set the PIA0 register wait states */ |
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116 | *(volatile unsigned32 *)0x80000020 = 0x04080000; |
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117 | |
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118 | /* |
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119 | * Allocate the memory for the RTEMS Work Space. This can come from |
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120 | * a variety of places: hard coded address, malloc'ed from outside |
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121 | * RTEMS world (e.g. simulator or primitive memory manager), or (as |
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122 | * typically done by stock BSPs) by subtracting the required amount |
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123 | * of work space from the last physical address on the CPU board. |
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124 | */ |
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125 | |
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126 | /* |
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127 | * Need to "allocate" the memory for the RTEMS Workspace and |
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128 | * tell the RTEMS configuration where it is. This memory is |
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129 | * not malloc'ed. It is just "pulled from the air". |
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130 | */ |
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131 | |
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132 | BSP_Configuration.work_space_start = _sysalloc( BSP_Configuration.work_space_size + 512 ); |
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133 | if (!BSP_Configuration.work_space_start) |
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134 | rtems_fatal_error_occurred( BSP_Configuration.work_space_size ); |
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135 | |
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136 | BSP_Configuration.work_space_start = (void *) ((unsigned int)((char *)BSP_Configuration.work_space_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1)); |
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137 | |
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138 | /* |
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139 | * initialize the CPU table for this BSP |
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140 | */ |
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141 | |
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142 | Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */ |
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143 | Cpu_table.postdriver_hook = bsp_postdriver_hook; |
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144 | Cpu_table.interrupt_stack_size = 4096; |
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145 | |
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146 | _settrap( 109,&a29k_enable_sup); |
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147 | _settrap( 110,&a29k_disable_sup); |
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148 | _settrap( 111,&a29k_enable_all_sup); |
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149 | _settrap( 112,&a29k_disable_all_sup); |
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150 | _settrap( 106,&a29k_context_switch_sup); |
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151 | _settrap( 107,&a29k_context_restore_sup); |
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152 | _settrap( 108,&a29k_context_save_sup); |
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153 | _settrap( 105,&a29k_sigdfl_sup); |
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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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