1 | /* |
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2 | * @(#)bspstart.c 1.13 - 95/04/25 |
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3 | * |
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4 | */ |
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5 | |
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6 | /* bsp_start() |
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7 | * |
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8 | * This routine starts the application. It includes application, |
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9 | * board, and monitor specific initialization and configuration. |
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10 | * The generic CPU dependent initialization has been performed |
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11 | * before this routine is invoked. |
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12 | * |
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13 | * Called by RTEMS::RTEMS constructor in startup-ctor.cc |
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14 | * |
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15 | * INPUT: NONE |
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16 | * |
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17 | * OUTPUT: NONE |
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18 | * |
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19 | * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. |
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20 | * On-Line Applications Research Corporation (OAR). |
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21 | * All rights assigned to U.S. Government, 1994. |
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22 | * |
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23 | * This material may be reproduced by or for the U.S. Government pursuant |
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24 | * to the copyright license under the clause at DFARS 252.227-7013. This |
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25 | * notice must appear in all copies of this file and its derivatives. |
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26 | * |
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27 | * $Id$ |
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28 | */ |
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29 | |
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30 | #include <bsp.h> |
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31 | #include <libcsupport.h> |
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32 | |
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33 | #include <string.h> |
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34 | |
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35 | #ifdef STACK_CHECKER_ON |
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36 | #include <stackchk.h> |
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37 | #endif |
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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 | rtems_cpu_table Cpu_table; |
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43 | rtems_unsigned32 bsp_isr_level; |
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44 | |
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45 | #define WORKSPACE_SIZE (1024 * 1024) |
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46 | rtems_unsigned8 MY_WORK_SPACE[ WORKSPACE_SIZE ]; |
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47 | |
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48 | /* |
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49 | * Amount to increment itimer by each pass |
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50 | * It is a variable instead of a #define to allow the 'looptest' |
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51 | * script to bump it without recompiling rtems |
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52 | */ |
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53 | |
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54 | rtems_unsigned32 CPU_HPPA_CLICKS_PER_TICK; |
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55 | |
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56 | #if SIMHPPA_FAST_IDLE |
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57 | |
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58 | /* |
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59 | * Many of the tests are very slow on the simulator because they have |
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60 | * have 5 second delays hardwired in. |
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61 | * Try to speed those tests up by speeding up the clock when in idle |
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62 | */ |
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63 | |
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64 | rtems_extension |
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65 | fast_idle_switch_hook(rtems_tcb *current_task, |
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66 | rtems_tcb *heir_task) |
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67 | { |
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68 | static rtems_unsigned32 normal_clock = ~0; |
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69 | static rtems_unsigned32 fast_clock; |
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70 | |
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71 | /* init our params on first call */ |
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72 | if (normal_clock == ~0) |
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73 | { |
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74 | normal_clock = CPU_HPPA_CLICKS_PER_TICK; |
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75 | fast_clock = CPU_HPPA_CLICKS_PER_TICK / 0x100; |
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76 | if (fast_clock == 0) /* who? me? pathological? never! */ |
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77 | fast_clock++; |
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78 | } |
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79 | |
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80 | /* |
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81 | * Checking for 'name' field of 'IDLE' is not the best/safest, |
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82 | * but its the best we could think of at the moment. |
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83 | */ |
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84 | |
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85 | if (heir_task->name == rtems_build_name('I', 'D', 'L', 'E')) |
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86 | CPU_HPPA_CLICKS_PER_TICK = fast_clock; |
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87 | else if (current_task->name == rtems_build_name('I', 'D', 'L', 'E')) |
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88 | CPU_HPPA_CLICKS_PER_TICK = normal_clock; |
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89 | } |
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90 | |
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91 | #endif |
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92 | |
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93 | /* |
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94 | * Function: bsp_libc_init |
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95 | * Created: 94/12/6 |
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96 | * |
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97 | * Description: |
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98 | * Initialize whatever libc we are using |
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99 | * called from bsp_postdriver_hook |
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100 | * |
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101 | * |
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102 | * Parameters: |
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103 | * none |
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104 | * |
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105 | * Returns: |
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106 | * none. |
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107 | * |
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108 | * Side Effects: |
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109 | * |
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110 | * |
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111 | * Notes: |
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112 | * |
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113 | * Deficiencies/ToDo: |
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114 | * |
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115 | * |
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116 | */ |
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117 | |
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118 | void |
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119 | bsp_libc_init(void) |
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120 | { |
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121 | extern int end; |
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122 | rtems_unsigned32 heap_start; |
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123 | |
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124 | heap_start = (rtems_unsigned32) &end; |
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125 | if (heap_start & (CPU_ALIGNMENT-1)) |
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126 | heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1); |
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127 | |
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128 | RTEMS_Malloc_Initialize((void *) heap_start, 64 * 1024, 0); |
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129 | |
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130 | /* |
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131 | * Set up for the libc handling. |
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132 | */ |
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133 | |
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134 | if (BSP_Configuration.ticks_per_timeslice > 0) |
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135 | libc_init(1); /* reentrant if possible */ |
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136 | else |
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137 | libc_init(0); /* non-reentrant */ |
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138 | |
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139 | /* |
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140 | * on MP systems, always use the print buffer |
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141 | * instead of the (broken) system calls |
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142 | */ |
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143 | |
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144 | if (BSP_Configuration.User_multiprocessing_table) |
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145 | use_print_buffer = 1; |
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146 | |
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147 | #ifdef SIMHPPA_ROM |
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148 | use_print_buffer = 1; |
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149 | #endif |
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150 | } |
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151 | |
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152 | |
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153 | /* |
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154 | * Function: bsp_pretasking_hook |
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155 | * Created: 95/03/10 |
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156 | * |
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157 | * Description: |
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158 | * BSP pretasking hook. Called just before drivers are initialized. |
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159 | * Used to setup libc and install any BSP extensions. |
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160 | * |
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161 | * Parameters: |
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162 | * none |
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163 | * |
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164 | * Returns: |
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165 | * nada |
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166 | * |
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167 | * Side Effects: |
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168 | * installs a few extensions |
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169 | * |
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170 | * Notes: |
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171 | * Must not use libc (to do io) from here, since drivers are |
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172 | * not yet initialized. |
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173 | * |
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174 | * Deficiencies/ToDo: |
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175 | * |
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176 | * |
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177 | */ |
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178 | |
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179 | void |
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180 | bsp_pretasking_hook(void) |
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181 | { |
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182 | bsp_libc_init(); |
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183 | |
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184 | #if SIMHPPA_FAST_IDLE |
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185 | /* |
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186 | * Install the fast idle task switch extension |
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187 | * |
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188 | * on MP systems, might now want to do this; it confuses at least |
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189 | * one test (mp06) |
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190 | */ |
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191 | |
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192 | #if 0 |
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193 | if (BSP_Configuration.User_multiprocessing_table == 0) |
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194 | #endif |
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195 | { |
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196 | rtems_extensions_table fast_idle_extension; |
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197 | rtems_id extension_id; |
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198 | rtems_status_code rc; |
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199 | |
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200 | memset(&fast_idle_extension, 0, sizeof(fast_idle_extension)); |
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201 | |
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202 | fast_idle_extension.task_switch = fast_idle_switch_hook; |
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203 | |
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204 | rc = rtems_extension_create(rtems_build_name('F', 'D', 'L', 'E'), |
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205 | &fast_idle_extension, &extension_id); |
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206 | if (rc != RTEMS_SUCCESSFUL) |
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207 | rtems_fatal_error_occurred(rc); |
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208 | } |
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209 | #endif |
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210 | |
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211 | |
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212 | #ifdef STACK_CHECKER_ON |
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213 | /* |
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214 | * Initialize the stack bounds checker |
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215 | * We can either turn it on here or from the app. |
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216 | */ |
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217 | |
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218 | Stack_check_Initialize(); |
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219 | #endif |
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220 | } |
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221 | |
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222 | /* |
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223 | * Function: bsp_start |
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224 | * Created: 94/12/6 |
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225 | * |
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226 | * Description: |
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227 | * called by crt0 as our "main" equivalent |
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228 | * |
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229 | * |
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230 | * |
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231 | * Parameters: |
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232 | * |
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233 | * |
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234 | * Returns: |
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235 | * |
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236 | * |
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237 | * Side Effects: |
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238 | * |
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239 | * |
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240 | * Notes: |
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241 | * |
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242 | * |
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243 | * Deficiencies/ToDo: |
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244 | * |
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245 | * |
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246 | */ |
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247 | |
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248 | |
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249 | void |
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250 | bsp_start(void) |
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251 | { |
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252 | /* |
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253 | * Set cpu_number to accurately reflect our cpu number |
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254 | */ |
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255 | |
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256 | #ifdef hppa7200 |
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257 | /* |
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258 | * Use DR0 if supported |
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259 | */ |
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260 | { |
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261 | int dr0; |
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262 | HPPA_ASM_MFCPU(DR0, dr0); |
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263 | cpu_number = (dr0 >> 4) & 0x7; |
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264 | } |
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265 | #else |
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266 | if (Configuration.User_multiprocessing_table) |
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267 | cpu_number = Configuration.User_multiprocessing_table->node - 1; |
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268 | else |
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269 | cpu_number = 0; |
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270 | #endif |
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271 | |
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272 | /* |
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273 | * Copy the table |
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274 | */ |
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275 | |
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276 | BSP_Configuration = Configuration; |
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277 | |
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278 | BSP_Configuration.work_space_start = (void *)MY_WORK_SPACE; |
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279 | if (BSP_Configuration.work_space_size) |
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280 | BSP_Configuration.work_space_size = WORKSPACE_SIZE; |
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281 | |
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282 | /* |
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283 | * Set up our hooks |
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284 | * Make sure libc_init is done before drivers init'd so that |
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285 | * they can use atexit() |
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286 | */ |
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287 | |
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288 | Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */ |
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289 | |
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290 | Cpu_table.predriver_hook = NULL; |
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291 | |
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292 | Cpu_table.postdriver_hook = NULL; |
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293 | |
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294 | Cpu_table.idle_task = NULL; /* do not override system IDLE task */ |
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295 | |
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296 | /* |
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297 | * Don't zero out the workspace. The simulator did it for us. |
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298 | */ |
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299 | |
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300 | Cpu_table.do_zero_of_workspace = FALSE; |
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301 | |
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302 | Cpu_table.interrupt_stack_size = (12 * 1024); |
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303 | |
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304 | Cpu_table.extra_system_initialization_stack = 0; |
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305 | |
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306 | /* |
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307 | * Set this artificially low for the simulator |
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308 | */ |
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309 | |
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310 | Cpu_table.itimer_clicks_per_microsecond = 1; |
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311 | |
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312 | /* |
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313 | * Determine the external interrupt processing order |
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314 | * the external interrupt handler walks thru this table, in |
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315 | * order checking for posted interrupts. |
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316 | */ |
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317 | |
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318 | Cpu_table.external_interrupts = 0; |
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319 | |
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320 | Cpu_table.external_interrupt[ Cpu_table.external_interrupts ] = |
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321 | HPPA_INTERRUPT_EXTERNAL_INTERVAL_TIMER - HPPA_INTERRUPT_EXTERNAL_BASE; |
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322 | Cpu_table.external_interrupts++; |
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323 | |
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324 | if ( Configuration.User_multiprocessing_table ) { |
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325 | Cpu_table.external_interrupt[ Cpu_table.external_interrupts ] = |
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326 | HPPA_INTERRUPT_EXTERNAL_10 - HPPA_INTERRUPT_EXTERNAL_BASE; |
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327 | Cpu_table.external_interrupts++; |
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328 | } |
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329 | |
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330 | /* |
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331 | * Add 1 region for RTEMS Malloc |
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332 | */ |
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333 | |
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334 | BSP_Configuration.maximum_regions++; |
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335 | |
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336 | #ifdef RTEMS_NEWLIB |
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337 | /* |
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338 | * Add 1 extension for newlib libc |
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339 | */ |
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340 | |
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341 | BSP_Configuration.maximum_extensions++; |
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342 | #endif |
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343 | |
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344 | #ifdef STACK_CHECKER_ON |
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345 | /* |
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346 | * Add 1 extension for stack checker |
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347 | */ |
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348 | |
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349 | BSP_Configuration.maximum_extensions++; |
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350 | #endif |
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351 | |
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352 | #if SIMHPPA_FAST_IDLE |
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353 | /* |
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354 | * Add 1 extension for fast idle |
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355 | */ |
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356 | |
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357 | BSP_Configuration.maximum_extensions++; |
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358 | #endif |
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359 | |
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360 | /* |
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361 | * Add 1 extension for MPCI_fatal |
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362 | */ |
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363 | |
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364 | if (BSP_Configuration.User_multiprocessing_table) |
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365 | BSP_Configuration.maximum_extensions++; |
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366 | |
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367 | /* |
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368 | * Set the "clicks per tick" for the simulator |
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369 | * used by libcpu/hppa/clock/clock.c to schedule interrupts |
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370 | * |
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371 | * Set it only if 0 to allow for simulator setting it via script |
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372 | * on test startup. |
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373 | */ |
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374 | |
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375 | if (CPU_HPPA_CLICKS_PER_TICK == 0) |
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376 | CPU_HPPA_CLICKS_PER_TICK = 0x4000; |
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377 | |
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378 | /* |
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379 | * Start most of RTEMS |
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380 | * main() will start the rest |
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381 | */ |
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382 | |
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383 | bsp_isr_level = rtems_initialize_executive_early( |
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384 | &BSP_Configuration, |
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385 | &Cpu_table |
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386 | ); |
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387 | } |
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