1 | /* |
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2 | * COPYRIGHT (c) 1998 by Radstone Technology |
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3 | * |
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4 | * |
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5 | * THIS FILE IS PROVIDED TO YOU, THE USER, "AS IS", WITHOUT WARRANTY OF ANY |
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6 | * KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE |
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7 | * IMPLIED WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK |
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8 | * AS TO THE QUALITY AND PERFORMANCE OF ALL CODE IN THIS FILE IS WITH YOU. |
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9 | * |
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10 | * You are hereby granted permission to use, copy, modify, and distribute |
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11 | * this file, provided that this notice, plus the above copyright notice |
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12 | * and disclaimer, appears in all copies. Radstone Technology will provide |
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13 | * no support for this code. |
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14 | * |
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15 | */ |
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16 | /* bspstart.c |
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17 | * |
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18 | * This set of routines starts the application. It includes application, |
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19 | * board, and monitor specific initialization and configuration. |
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20 | * The generic CPU dependent initialization has been performed |
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21 | * before any of these are invoked. |
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22 | * |
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23 | * COPYRIGHT (c) 1989-1997. |
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24 | * On-Line Applications Research Corporation (OAR). |
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25 | * Copyright assigned to U.S. Government, 1994. |
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26 | * |
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27 | * The license and distribution terms for this file may in |
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28 | * the file LICENSE in this distribution or at |
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29 | * http://www.OARcorp.com/rtems/license.html. |
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30 | * |
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31 | * $Id: |
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32 | */ |
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33 | |
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34 | #include <string.h> |
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35 | |
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36 | #include <bsp.h> |
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37 | #include <rtems/libio.h> |
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38 | #include <rtems/libcsupport.h> |
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39 | #include <pci.h> |
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40 | |
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41 | unsigned char ucSystemType; |
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42 | unsigned char ucBoardRevMaj; |
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43 | unsigned char ucBoardRevMin; |
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44 | unsigned long ulMemorySize; |
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45 | unsigned long ulCpuBusClock; |
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46 | |
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47 | /* |
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48 | * The bus speed is expressed in MHz |
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49 | */ |
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50 | static unsigned long ulBusSpeed[] = { |
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51 | 56250000, |
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52 | 60000000, |
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53 | 64300000, |
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54 | 66666667, |
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55 | 75000000, |
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56 | 83333333, |
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57 | 100000000, |
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58 | 66666667 |
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59 | }; |
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60 | |
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61 | /* |
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62 | * The original table from the application and our copy of it with |
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63 | * some changes. |
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64 | */ |
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65 | |
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66 | extern rtems_configuration_table Configuration; |
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67 | rtems_configuration_table BSP_Configuration; |
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68 | |
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69 | rtems_cpu_table Cpu_table; |
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70 | rtems_unsigned32 bsp_isr_level; |
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71 | |
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72 | static int stdin_fd, stdout_fd, stderr_fd; |
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73 | |
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74 | /* |
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75 | * End of RTEMs image imported from linker |
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76 | */ |
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77 | extern int end; |
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78 | |
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79 | /* |
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80 | * Use the shared implementations of the following routines |
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81 | */ |
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82 | |
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83 | void bsp_postdriver_hook(void); |
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84 | void bsp_libc_init( void *, unsigned32, int ); |
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85 | |
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86 | /* |
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87 | * bsp_pretasking_hook |
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88 | * |
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89 | * BSP pretasking hook. Called just before drivers are initialized. |
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90 | * Used to setup libc and install any BSP extensions. |
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91 | */ |
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92 | |
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93 | void bsp_pretasking_hook(void) |
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94 | { |
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95 | rtems_unsigned32 heap_start; |
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96 | rtems_unsigned32 heap_size; |
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97 | |
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98 | heap_start = (rtems_unsigned32) &end; |
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99 | if (heap_start & (CPU_ALIGNMENT-1)) |
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100 | heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1); |
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101 | |
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102 | heap_size = BSP_Configuration.work_space_start - (void *)&end; |
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103 | heap_size &= 0xfffffff0; /* keep it as a multiple of 16 bytes */ |
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104 | |
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105 | bsp_libc_init((void *) heap_start, heap_size, 0); |
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106 | |
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107 | /* |
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108 | * Initialise RTC hooks based on system type |
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109 | */ |
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110 | InitializeRTC(); |
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111 | |
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112 | /* |
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113 | * Initialise NvRAM hooks based on system type |
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114 | */ |
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115 | InitializeNvRAM(); |
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116 | |
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117 | /* |
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118 | * Initialise the PCI bus(ses) |
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119 | */ |
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120 | InitializePCI(); |
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121 | |
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122 | /* |
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123 | * Initialize the Universe PCI-VME bridge |
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124 | */ |
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125 | InitializeUniverse(); |
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126 | |
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127 | |
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128 | #ifdef RTEMS_DEBUG |
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129 | rtems_debug_enable( RTEMS_DEBUG_ALL_MASK ); |
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130 | #endif |
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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 | * bsp_std_close |
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136 | * |
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137 | * Simple routine to close all standard IO streams. |
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138 | */ |
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139 | |
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140 | void bsp_std_close( void ) |
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141 | { |
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142 | close(stdin_fd); |
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143 | close(stdout_fd); |
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144 | close(stderr_fd); |
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145 | } |
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146 | |
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147 | |
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148 | /* |
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149 | * bsp_predriver_hook |
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150 | * |
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151 | * Before drivers are setup. |
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152 | */ |
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153 | void bsp_predriver_hook(void) |
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154 | { |
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155 | /* bsp_spurious_initialize; ??*/ |
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156 | initialize_external_exception_vector(); |
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157 | } |
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158 | |
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159 | /* |
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160 | * bsp_start |
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161 | * |
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162 | * This routine does the bulk of the system initialization. |
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163 | */ |
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164 | |
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165 | void bsp_start( void ) |
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166 | { |
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167 | unsigned char *work_space_start; |
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168 | unsigned char ucBoardRev, ucMothMemType, ucEquipPres1, ucEquipPres2; |
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169 | unsigned16 usPVR=0; |
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170 | unsigned8 ucTempl, ucTemph; |
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171 | unsigned8 ucBanksPresent; |
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172 | unsigned8 ucSimmPresent; |
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173 | unsigned32 ulCurBank, ulTopBank; |
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174 | |
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175 | /* |
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176 | * Determine system type |
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177 | */ |
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178 | inport_byte(&((PPLANARREGISTERS)0)->MotherboardMemoryType, ucMothMemType); |
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179 | inport_byte(&((PPLANARREGISTERS)0)->SimmPresent, ucSimmPresent); |
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180 | |
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181 | inport_byte(&((PPLANARREGISTERS)0)->EquipmentPresent1, ucEquipPres1); |
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182 | inport_byte(&((PPLANARREGISTERS)0)->EquipmentPresent2, ucEquipPres2); |
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183 | ucSystemType=((ucMothMemType&0x03)<<1) | ((ucEquipPres1&0x80)>>7); |
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184 | ucSystemType^=7; |
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185 | |
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186 | /* |
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187 | * Determine board revision for use by rev. specific code |
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188 | */ |
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189 | inport_byte(&((PPLANARREGISTERS)0)->BoardRevision, ucBoardRev); |
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190 | ucBoardRevMaj=ucBoardRev>>5; |
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191 | ucBoardRevMin=ucBoardRev&0x1f; |
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192 | |
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193 | /* |
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194 | * Determine the memory size by reading the end address for top |
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195 | * assigned bank in the memory controller |
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196 | */ |
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197 | (void)PCIConfigRead8(0,0,0,0xa0, &ucBanksPresent); |
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198 | for(ulCurBank=0;ulCurBank<8;ulCurBank++) |
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199 | { |
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200 | if((ucBanksPresent>>ulCurBank)&0x01) |
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201 | { |
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202 | ulTopBank=ulCurBank; |
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203 | } |
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204 | } |
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205 | |
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206 | (void)PCIConfigRead8(0,0,0,0x90+ulTopBank, &ucTempl); |
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207 | (void)PCIConfigRead8(0,0,0,0x98+ulTopBank, &ucTemph); |
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208 | ulMemorySize=(ucTempl+(ucTemph<<8)+1)<<20; |
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209 | #if PPCN_60X_USE_DINK |
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210 | ulMemorySize=0x01fe0000; |
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211 | #endif |
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212 | |
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213 | /* |
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214 | * Determine processor bus clock |
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215 | */ |
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216 | asm volatile ("mfpvr %0" : "=r" ((usPVR)) : "0" ((usPVR))); |
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217 | |
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218 | /* |
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219 | * Determine processor internal clock |
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220 | */ |
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221 | if(ucSystemType==SYS_TYPE_PPC4) |
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222 | { |
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223 | if(((ucBoardRevMaj==1) && (ucBoardRevMin==0)) || |
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224 | ((ucSimmPresent&0x40)==0)) |
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225 | { |
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226 | /* |
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227 | * Rev. 1A is always 66MHz |
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228 | */ |
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229 | ulCpuBusClock=66666667; |
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230 | } |
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231 | else |
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232 | { |
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233 | ulCpuBusClock=83333333; |
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234 | } |
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235 | } |
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236 | else if((((usPVR>>16)==MPC603e) && (ucSystemType!=SYS_TYPE_PPC1)) || |
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237 | ((usPVR>>16)==MPC603ev) || |
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238 | ((usPVR>>16)==MPC604e)) |
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239 | { |
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240 | ulCpuBusClock=ulBusSpeed[(ucEquipPres2&0x1c)>>2]; |
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241 | } |
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242 | else |
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243 | { |
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244 | if(((ucSystemType>SYS_TYPE_PPC1) || (ucBoardRevMaj>=5)) && |
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245 | (ucEquipPres1&0x08)) |
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246 | { |
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247 | /* |
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248 | * 66 MHz bus clock for 005 if indicated |
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249 | */ |
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250 | ulCpuBusClock=66666667; |
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251 | } |
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252 | else |
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253 | { |
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254 | /* |
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255 | * 33 MHz bus clock for 004 always |
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256 | */ |
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257 | ulCpuBusClock=33333333; |
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258 | } |
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259 | } |
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260 | |
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261 | |
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262 | /* |
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263 | * Allocate the memory for the RTEMS Work Space. This can come from |
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264 | * a variety of places: hard coded address, malloc'ed from outside |
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265 | * RTEMS world (e.g. simulator or primitive memory manager), or (as |
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266 | * typically done by stock BSPs) by subtracting the required amount |
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267 | * of work space from the last physical address on the CPU board. |
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268 | */ |
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269 | |
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270 | work_space_start = |
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271 | (unsigned char *)ulMemorySize - BSP_Configuration.work_space_size; |
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272 | |
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273 | if ( work_space_start <= (unsigned char *)&end ) { |
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274 | DEBUG_puts( "bspstart: Not enough RAM!!!\n" ); |
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275 | bsp_cleanup(); |
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276 | } |
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277 | |
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278 | BSP_Configuration.work_space_start = work_space_start; |
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279 | |
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280 | /* |
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281 | * initialize the CPU table for this BSP |
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282 | */ |
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283 | |
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284 | Cpu_table.exceptions_in_RAM = TRUE; |
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285 | Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */ |
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286 | Cpu_table.predriver_hook = bsp_predriver_hook; |
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287 | Cpu_table.postdriver_hook = bsp_postdriver_hook; |
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288 | Cpu_table.do_zero_of_workspace = TRUE; |
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289 | Cpu_table.interrupt_stack_size = CONFIGURE_INTERRUPT_STACK_MEMORY; |
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290 | Cpu_table.clicks_per_usec = ulCpuBusClock/4000000; |
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291 | |
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292 | |
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293 | } |
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294 | |
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