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 | */ |
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56 | |
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57 | #include <string.h> |
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58 | |
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59 | #include <bsp.h> |
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60 | #include <bsp/irq.h> |
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61 | #include <bsp/linker-symbols.h> |
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62 | #include <rtems/bspIo.h> |
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63 | #include <libcpu/cpuIdent.h> |
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64 | #include <libcpu/spr.h> |
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65 | #include <rtems/powerpc/powerpc.h> |
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66 | |
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67 | #include RTEMS_XPARAMETERS_H |
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68 | |
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69 | /* Symbols defined in linker command file */ |
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70 | LINKER_SYMBOL(virtex_exc_vector_base); |
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71 | |
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72 | /* |
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73 | * Driver configuration parameters |
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74 | */ |
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75 | uint32_t bsp_clicks_per_usec; |
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76 | uint32_t bsp_timer_average_overhead; /* Average overhead of timer in ticks */ |
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77 | uint32_t bsp_timer_least_valid; /* Least valid number from timer */ |
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78 | bool bsp_timer_internal_clock; /* TRUE, when timer runs with CPU clk */ |
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79 | |
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80 | /* |
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81 | * bsp_start |
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82 | * |
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83 | * This routine does the bulk of the system initialization. |
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84 | */ |
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85 | void bsp_start( void ) |
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86 | { |
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87 | /* |
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88 | * Get CPU identification dynamically. Note that the get_ppc_cpu_type() |
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89 | * function store the result in global variables |
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90 | * so that it can be used latter... |
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91 | */ |
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92 | get_ppc_cpu_type(); |
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93 | get_ppc_cpu_revision(); |
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94 | |
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95 | /* |
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96 | * initialize the device driver parameters |
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97 | */ |
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98 | |
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99 | /* timebase register ticks/microsecond */ |
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100 | bsp_clicks_per_usec = (250000000 / 1000000); |
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101 | bsp_timer_internal_clock = true; |
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102 | bsp_timer_average_overhead = 2; |
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103 | bsp_timer_least_valid = 3; |
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104 | |
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105 | /* |
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106 | * Initialize default raw exception handlers. |
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107 | */ |
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108 | ppc_exc_initialize_with_vector_base( |
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109 | PPC_INTERRUPT_DISABLE_MASK_DEFAULT, |
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110 | (uintptr_t) bsp_section_work_begin, |
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111 | rtems_configuration_get_interrupt_stack_size(), |
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112 | virtex_exc_vector_base |
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113 | ); |
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114 | __asm__ volatile ("mtevpr %0" : : "r" (virtex_exc_vector_base)); |
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115 | |
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116 | /* |
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117 | * Install our own set of exception vectors |
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118 | */ |
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119 | BSP_rtems_irq_mng_init(0); |
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120 | } |
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121 | |
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122 | void BSP_ask_for_reset(void) |
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123 | { |
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124 | printk("system stopped, press RESET"); |
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125 | while(1) {}; |
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126 | } |
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127 | |
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128 | void BSP_panic(char *s) |
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129 | { |
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130 | printk("%s PANIC %s\n",_RTEMS_version, s); |
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131 | BSP_ask_for_reset(); |
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132 | } |
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133 | |
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134 | void _BSP_Fatal_error(unsigned int v) |
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135 | { |
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136 | printk("%s PANIC ERROR %x\n",_RTEMS_version, v); |
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137 | BSP_ask_for_reset(); |
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138 | } |
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