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 | * Author: Thomas Doerfler <td@imd.m.isar.de> |
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13 | * IMD Ingenieurbuero fuer Microcomputertechnik |
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14 | * |
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15 | * COPYRIGHT (c) 1998 by IMD |
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16 | * |
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17 | * Changes from IMD are covered by the original distributions terms. |
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18 | * This file has been derived from the papyrus BSP: |
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19 | * |
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20 | * Author: Andrew Bray <andy@i-cubed.co.uk> |
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21 | * |
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22 | * COPYRIGHT (c) 1995 by i-cubed ltd. |
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23 | * |
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24 | * To anyone who acknowledges that this file is provided "AS IS" |
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25 | * without any express or implied warranty: |
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26 | * permission to use, copy, modify, and distribute this file |
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27 | * for any purpose is hereby granted without fee, provided that |
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28 | * the above copyright notice and this notice appears in all |
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29 | * copies, and that the name of i-cubed limited not be used in |
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30 | * advertising or publicity pertaining to distribution of the |
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31 | * software without specific, written prior permission. |
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32 | * i-cubed limited makes no representations about the suitability |
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33 | * of this software for any purpose. |
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34 | * |
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35 | * Modifications for spooling console driver and control of memory layout |
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36 | * with linker command file by |
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37 | * Thomas Doerfler <td@imd.m.isar.de> |
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38 | * for these modifications: |
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39 | * COPYRIGHT (c) 1997 by IMD, Puchheim, Germany. |
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40 | * |
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41 | * To anyone who acknowledges that this file is provided "AS IS" |
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42 | * without any express or implied warranty: |
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43 | * permission to use, copy, modify, and distribute this file |
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44 | * for any purpose is hereby granted without fee, provided that |
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45 | * the above copyright notice and this notice appears in all |
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46 | * copies. IMD makes no representations about the suitability |
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47 | * of this software for any purpose. |
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48 | * |
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49 | * Derived from c/src/lib/libbsp/no_cpu/no_bsp/startup/bspstart.c: |
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50 | * |
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51 | * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. |
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52 | * On-Line Applications Research Corporation (OAR). |
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53 | * |
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54 | * Modifications for PPC405GP by Dennis Ehlin |
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55 | * Modifications for Virtex4 by Richard Claus <claus@slac.stanford.edu> |
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56 | */ |
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57 | |
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58 | #include <string.h> |
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59 | #include <fcntl.h> |
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60 | |
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61 | #include <bsp.h> |
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62 | #include <bsp/irq.h> |
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63 | #include <bsp/vectors.h> |
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64 | #include <rtems/bspIo.h> |
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65 | #include <rtems/libio.h> |
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66 | #include <rtems/libcsupport.h> |
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67 | #include <rtems/sptables.h> /* for RTEMS_VERSION */ |
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68 | #include <libcpu/cpuIdent.h> |
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69 | #include <libcpu/spr.h> |
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70 | |
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71 | #define DO_DOWN_ALIGN(x,a) ((x) & ~((a)-1)) |
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72 | |
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73 | #define DO_UP_ALIGN(x,a) DO_DOWN_ALIGN(((x) + (a) - 1 ),a) |
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74 | |
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75 | #define CPU_DOWN_ALIGN(x) DO_DOWN_ALIGN(x, CPU_ALIGNMENT) |
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76 | #define CPU_UP_ALIGN(x) DO_UP_ALIGN(x, CPU_ALIGNMENT) |
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77 | |
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78 | |
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79 | /* Expected by clock.c */ |
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80 | uint32_t bsp_clicks_per_usec; |
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81 | bool bsp_timer_internal_clock; /* true, when timer runs with CPU clk */ |
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82 | uint32_t bsp_timer_least_valid; |
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83 | uint32_t bsp_timer_average_overhead; |
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84 | |
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85 | |
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86 | /* Defined in linkcmds linker script */ |
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87 | LINKER_SYMBOL(RamBase); |
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88 | LINKER_SYMBOL(RamSize); |
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89 | LINKER_SYMBOL(__bsp_ram_start); |
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90 | LINKER_SYMBOL(__bsp_ram_end); |
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91 | LINKER_SYMBOL(__rtems_end); |
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92 | LINKER_SYMBOL(_stack); |
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93 | LINKER_SYMBOL(StackSize); |
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94 | LINKER_SYMBOL(__stack_base); |
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95 | LINKER_SYMBOL(WorkAreaBase); |
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96 | LINKER_SYMBOL(MsgAreaBase); |
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97 | LINKER_SYMBOL(MsgAreaSize); |
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98 | LINKER_SYMBOL(__phy_ram_end); |
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99 | |
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100 | |
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101 | /* |
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102 | * Provide weak aliases so that RTEMS distribution builds |
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103 | */ |
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104 | static void _noopfun(void) {} |
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105 | static void _bsp_start(void) |
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106 | { |
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107 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
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108 | uintptr_t intrStackStart = CPU_UP_ALIGN((uint32_t)__bsp_ram_start); |
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109 | uintptr_t intrStackSize = rtems_configuration_get_interrupt_stack_size(); |
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110 | |
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111 | /* |
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112 | * Initialize default raw exception handlers. |
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113 | * |
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114 | * This BSP does not assume anything about firmware possibly loaded in the |
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115 | * FPGA, so the external interrupt should not be enabled in order to avoid |
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116 | * spurious interrupts. |
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117 | */ |
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118 | sc = ppc_exc_initialize(PPC_INTERRUPT_DISABLE_MASK_DEFAULT & ~MSR_EE, |
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119 | intrStackStart, |
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120 | intrStackSize); |
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121 | if (sc != RTEMS_SUCCESSFUL) BSP_panic("Cannot initialize exceptions"); |
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122 | |
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123 | /* Install our own set of exception vectors */ |
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124 | BSP_rtems_irq_mngt_init(0); |
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125 | } |
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126 | |
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127 | |
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128 | void app_bsp_start(void) |
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129 | __attribute__(( weak, alias("_bsp_start") )); |
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130 | |
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131 | void app_bsp_pretasking_hook(void) |
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132 | __attribute__(( weak, alias("_noopfun") )); |
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133 | |
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134 | void app_bsp_predriver_hook(void) |
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135 | __attribute__(( weak, alias("_noopfun") )); |
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136 | |
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137 | |
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138 | static char* bspMsgBuffer = (char*)MsgAreaBase; |
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139 | |
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140 | static void __bsp_outchar_to_memory(char c) |
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141 | { |
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142 | static char* msgBuffer = (char*)MsgAreaBase; |
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143 | *msgBuffer++ = c; |
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144 | if (msgBuffer >= &bspMsgBuffer[(int)MsgAreaSize]) msgBuffer = bspMsgBuffer; |
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145 | *msgBuffer = 0x00; /* Overwrite next location to show EOM */ |
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146 | } |
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147 | |
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148 | |
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149 | void BSP_ask_for_reset(void) |
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150 | { |
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151 | printk("\nSystem stopped, issue RESET"); |
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152 | for(;;); |
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153 | } |
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154 | |
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155 | |
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156 | void BSP_panic(char *s) |
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157 | { |
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158 | printk("\n%s PANIC %s\n", _RTEMS_version, s); |
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159 | BSP_ask_for_reset(); |
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160 | } |
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161 | |
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162 | |
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163 | void _BSP_Fatal_error(unsigned int v) |
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164 | { |
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165 | printk("\n%s FATAL ERROR %x\n", _RTEMS_version, v); |
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166 | BSP_ask_for_reset(); |
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167 | } |
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168 | |
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169 | |
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170 | /*===================================================================*/ |
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171 | |
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172 | /* |
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173 | * BSP start routine. Called by boot_card(). |
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174 | * |
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175 | * This routine does the bulk of the system initialization. |
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176 | */ |
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177 | void bsp_start(void) |
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178 | { |
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179 | uintptr_t intrStackStart; |
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180 | uintptr_t intrStackSize; |
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181 | ppc_cpu_id_t myCpu; |
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182 | ppc_cpu_revision_t myCpuRevision; |
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183 | |
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184 | /* Set the character output function; The application may override this */ |
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185 | BSP_output_char = __bsp_outchar_to_memory; |
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186 | |
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187 | printk("\nWelcome to RTEMS %s\n", _RTEMS_version ); |
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188 | |
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189 | /* |
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190 | * Get CPU identification dynamically. Note that the get_ppc_cpu_type() |
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191 | * function stores the result in global variables so that it can be used later... |
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192 | */ |
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193 | myCpu = get_ppc_cpu_type(); |
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194 | myCpuRevision = get_ppc_cpu_revision(); |
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195 | printk("CPU: 0x%04x, Revision: 0x%04x = %d, Name: %s\n", |
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196 | myCpu, myCpuRevision, myCpuRevision, get_ppc_cpu_type_name(myCpu)); |
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197 | |
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198 | /* |
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199 | * Initialize the device driver parameters |
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200 | */ |
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201 | |
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202 | /* Timebase register ticks/microsecond; The application may override these */ |
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203 | bsp_clicks_per_usec = 350; |
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204 | bsp_timer_internal_clock = true; |
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205 | bsp_timer_average_overhead = 2; |
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206 | bsp_timer_least_valid = 3; |
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207 | |
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208 | /* |
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209 | * Initialize the interrupt related settings. |
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210 | */ |
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211 | intrStackStart = CPU_UP_ALIGN((uint32_t)__bsp_ram_start); |
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212 | intrStackSize = rtems_configuration_get_interrupt_stack_size(); |
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213 | printk(" Base/Start End Size\n" |
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214 | "RAM: 0x%08x 0x%x\n" |
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215 | "RTEMS: 0x%08x\n" |
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216 | "Interrupt Stack: 0x%08x 0x%x\n" |
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217 | "Stack: 0x%08x 0x%08x 0x%x\n" |
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218 | "Workspace: 0x%08x 0x%08x\n" |
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219 | "MsgArea: 0x%08x 0x%x\n" |
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220 | "Physical RAM 0x%08x\n", |
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221 | (uint32_t)RamBase, (uint32_t)RamSize, |
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222 | (uint32_t)__rtems_end, |
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223 | intrStackStart, intrStackSize, |
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224 | (uint32_t)__stack_base, (uint32_t)_stack, (uint32_t)StackSize, |
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225 | (uint32_t)WorkAreaBase, (uint32_t)__bsp_ram_end, |
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226 | (uint32_t)MsgAreaBase, (uint32_t)MsgAreaSize, |
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227 | (uint32_t)__phy_ram_end); |
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228 | |
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229 | /* Continue with application-specific initialization */ |
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230 | app_bsp_start(); |
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231 | } |
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232 | |
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233 | |
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234 | /* |
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235 | * BSP pretasking hook. Called just before drivers are initialized. |
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236 | * Used to setup libc and install any BSP extensions. |
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237 | * |
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238 | * Must not use libc (to do io) from here, since drivers are not yet |
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239 | * initialized. |
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240 | */ |
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241 | |
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242 | void bsp_pretasking_hook(void) |
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243 | { |
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244 | app_bsp_pretasking_hook(); |
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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 | * BSP predriver hook. Called by boot_card() just before drivers are |
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250 | * initialized. Clear out any stale interrupts here. |
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251 | */ |
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252 | void bsp_predriver_hook(void) |
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253 | { |
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254 | app_bsp_predriver_hook(); |
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255 | } |
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