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) 1989-1998. |
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13 | * On-Line Applications Research Corporation (OAR). |
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14 | * Copyright assigned to U.S. Government, 1994. |
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15 | * |
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16 | * The license and distribution terms for this file may be |
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17 | * found in the file LICENSE in this distribution or at |
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18 | * http://www.OARcorp.com/rtems/license.html. |
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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 <bsp.h> |
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24 | #include <rtems/libio.h> |
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25 | |
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26 | #include <libcsupport.h> |
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27 | |
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28 | #include <string.h> |
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29 | |
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30 | #ifndef lint |
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31 | static char _sccsid[] = "@(#)bspstart.c 09/11/96 1.15\n"; |
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32 | #endif |
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33 | |
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34 | /* |
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35 | * The original table from the application and our copy of it with |
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36 | * some changes. |
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37 | */ |
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38 | |
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39 | extern rtems_configuration_table Configuration; |
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40 | |
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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 | char *rtems_progname; |
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46 | |
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47 | /* Initialize whatever libc we are using |
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48 | * called from postdriver hook |
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49 | */ |
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50 | |
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51 | #define HEAP_BLOCK_SIZE (16 * 1024) |
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52 | |
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53 | rtems_unsigned32 heap_size = 0; |
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54 | rtems_unsigned32 heap_start; |
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55 | |
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56 | void bsp_libc_init() |
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57 | { |
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58 | heap_size = 2 * 1024 * 1024; /* allocate a maximum of 2 megabytes for the heap */ |
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59 | |
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60 | /* allocate all remaining memory to the heap */ |
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61 | do { |
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62 | heap_size -= HEAP_BLOCK_SIZE; |
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63 | heap_start = _sysalloc( heap_size ); |
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64 | } while ( !heap_start ); |
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65 | |
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66 | if (!heap_start) |
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67 | rtems_fatal_error_occurred( heap_size ); |
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68 | |
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69 | if (heap_start & (CPU_ALIGNMENT-1)) |
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70 | heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1); |
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71 | |
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72 | /* |
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73 | * The last parameter to RTEMS_Malloc_Initialize is the "chunk" |
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74 | * size which a multiple of will be requested on each sbrk() |
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75 | * call by malloc(). A value of 0 indicates that sbrk() should |
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76 | * not be called to extend the heap. |
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77 | */ |
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78 | |
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79 | RTEMS_Malloc_Initialize((void *) heap_start, heap_size, 0); |
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80 | |
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81 | /* |
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82 | * Init the RTEMS libio facility to provide UNIX-like system |
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83 | * calls for use by newlib (ie: provide __rtems_open, __rtems_close, etc) |
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84 | * Uses malloc() to get area for the iops, so must be after malloc init |
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85 | */ |
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86 | |
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87 | rtems_libio_init(); |
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88 | |
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89 | /* |
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90 | * Set up for the libc handling. |
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91 | */ |
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92 | |
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93 | if (BSP_Configuration.ticks_per_timeslice > 0) |
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94 | libc_init(1); /* reentrant if possible */ |
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95 | else |
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96 | libc_init(0); /* non-reentrant */ |
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97 | |
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98 | } |
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99 | |
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100 | /* |
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101 | * Function: bsp_pretasking_hook |
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102 | * Created: 95/03/10 |
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103 | * |
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104 | * Description: |
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105 | * BSP pretasking hook. Called just before drivers are initialized. |
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106 | * Used to setup libc and install any BSP extensions. |
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107 | * |
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108 | * NOTES: |
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109 | * Must not use libc (to do io) from here, since drivers are |
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110 | * not yet initialized. |
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111 | * |
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112 | */ |
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113 | |
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114 | void |
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115 | bsp_pretasking_hook(void) |
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116 | { |
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117 | bsp_libc_init(); |
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118 | |
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119 | #ifdef RTEMS_DEBUG |
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120 | rtems_debug_enable( RTEMS_DEBUG_ALL_MASK ); |
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121 | #endif |
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122 | } |
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123 | |
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124 | |
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125 | /* |
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126 | * Use the shared bsp_postdriver_hook() implementation |
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127 | */ |
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128 | |
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129 | void bsp_postdriver_hook(void); |
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130 | |
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131 | int bsp_start( |
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132 | int argc, |
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133 | char **argv, |
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134 | char **environp |
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135 | ) |
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136 | { |
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137 | if ((argc > 0) && argv && argv[0]) |
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138 | rtems_progname = argv[0]; |
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139 | else |
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140 | rtems_progname = "RTEMS"; |
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141 | |
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142 | /* set the PIA0 register wait states */ |
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143 | *(volatile unsigned32 *)0x80000020 = 0x04080000; |
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144 | |
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145 | /* |
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146 | * Allocate the memory for the RTEMS Work Space. This can come from |
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147 | * a variety of places: hard coded address, malloc'ed from outside |
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148 | * RTEMS world (e.g. simulator or primitive memory manager), or (as |
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149 | * typically done by stock BSPs) by subtracting the required amount |
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150 | * of work space from the last physical address on the CPU board. |
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151 | */ |
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152 | |
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153 | /* |
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154 | * Copy the Configuration Table .. so we can change it |
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155 | */ |
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156 | |
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157 | BSP_Configuration = Configuration; |
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158 | |
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159 | /* |
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160 | * Tell libio how many fd's we want and allow it to tweak config |
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161 | */ |
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162 | |
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163 | rtems_libio_config(&BSP_Configuration, BSP_LIBIO_MAX_FDS); |
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164 | |
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165 | /* |
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166 | * Need to "allocate" the memory for the RTEMS Workspace and |
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167 | * tell the RTEMS configuration where it is. This memory is |
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168 | * not malloc'ed. It is just "pulled from the air". |
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169 | */ |
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170 | |
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171 | BSP_Configuration.work_space_start = _sysalloc( BSP_Configuration.work_space_size + 512 ); |
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172 | if (!BSP_Configuration.work_space_start) |
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173 | rtems_fatal_error_occurred( BSP_Configuration.work_space_size ); |
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174 | |
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175 | BSP_Configuration.work_space_start = (void *) ((unsigned int)((char *)BSP_Configuration.work_space_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1)); |
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176 | |
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177 | /* |
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178 | * initialize the CPU table for this BSP |
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179 | */ |
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180 | |
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181 | /* |
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182 | * we do not use the pretasking_hook |
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183 | */ |
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184 | |
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185 | Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */ |
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186 | |
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187 | Cpu_table.predriver_hook = NULL; |
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188 | |
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189 | Cpu_table.postdriver_hook = bsp_postdriver_hook; |
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190 | |
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191 | Cpu_table.idle_task = NULL; /* do not override system IDLE task */ |
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192 | |
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193 | Cpu_table.do_zero_of_workspace = TRUE; |
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194 | |
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195 | Cpu_table.interrupt_stack_size = 4096; |
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196 | |
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197 | Cpu_table.extra_system_initialization_stack = 0; |
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198 | |
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199 | /* |
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200 | * Don't forget the other CPU Table entries. |
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201 | */ |
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202 | |
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203 | _settrap( 109,&a29k_enable_sup); |
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204 | _settrap( 110,&a29k_disable_sup); |
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205 | _settrap( 111,&a29k_enable_all_sup); |
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206 | _settrap( 112,&a29k_disable_all_sup); |
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207 | _settrap( 106,&a29k_context_switch_sup); |
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208 | _settrap( 107,&a29k_context_restore_sup); |
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209 | _settrap( 108,&a29k_context_save_sup); |
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210 | _settrap( 105,&a29k_sigdfl_sup); |
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211 | |
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212 | /* |
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213 | * Start RTEMS |
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214 | */ |
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215 | |
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216 | rtems_initialize_executive( &BSP_Configuration, &Cpu_table ); |
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217 | |
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218 | bsp_cleanup(); |
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219 | |
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220 | return 0; |
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221 | } |
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