1 | /** |
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2 | * @file |
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3 | * |
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4 | * @ingroup ScoreCPU |
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5 | * |
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6 | * @brief ARM exception support implementation. |
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7 | */ |
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8 | |
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9 | /* |
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10 | * COPYRIGHT (c) 2000 Canon Research Centre France SA. |
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11 | * Emmanuel Raguet, mailto:raguet@crf.canon.fr |
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12 | * |
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13 | * Copyright (c) 2002 Advent Networks, Inc |
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14 | * Jay Monkman <jmonkman@adventnetworks.com> |
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15 | * |
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16 | * Copyright (c) 2007 Ray xu <rayx.cn@gmail.com> |
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17 | * |
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18 | * The license and distribution terms for this file may be |
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19 | * found in the file LICENSE in this distribution or at |
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20 | * http://www.rtems.com/license/LICENSE. |
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21 | * |
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22 | * Moved from file 'cpukit/score/cpu/arm/cpu.c'. |
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23 | * |
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24 | * $Id$ |
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25 | */ |
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26 | |
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27 | #ifdef HAVE_CONFIG_H |
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28 | #include "config.h" |
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29 | #endif |
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30 | |
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31 | #include <rtems/system.h> |
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32 | #include <rtems.h> |
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33 | #include <rtems/bspIo.h> |
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34 | #include <rtems/score/isr.h> |
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35 | #include <rtems/score/wkspace.h> |
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36 | #include <rtems/score/thread.h> |
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37 | #include <rtems/score/cpu.h> |
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38 | |
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39 | static void _defaultExcHandler (CPU_Exception_frame *ctx) |
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40 | { |
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41 | printk("\n\r"); |
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42 | printk("----------------------------------------------------------\n\r"); |
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43 | #if 1 |
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44 | printk("Exception 0x%x caught at PC 0x%x by thread %d\n", |
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45 | ctx->register_ip, ctx->register_lr - 4, |
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46 | _Thread_Executing->Object.id); |
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47 | #endif |
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48 | printk("----------------------------------------------------------\n\r"); |
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49 | printk("Processor execution context at time of the fault was :\n\r"); |
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50 | printk("----------------------------------------------------------\n\r"); |
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51 | #if 0 |
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52 | printk(" r0 = %8x r1 = %8x r2 = %8x r3 = %8x\n\r", |
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53 | ctx->register_r0, ctx->register_r1, |
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54 | ctx->register_r2, ctx->register_r3); |
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55 | printk(" r4 = %8x r5 = %8x r6 = %8x r7 = %8x\n\r", |
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56 | ctx->register_r4, ctx->register_r5, |
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57 | ctx->register_r6, ctx->register_r7); |
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58 | printk(" r8 = %8x r9 = %8x r10 = %8x\n\r", |
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59 | ctx->register_r8, ctx->register_r9, ctx->register_r10); |
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60 | printk(" fp = %8x ip = %8x sp = %8x pc = %8x\n\r", |
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61 | ctx->register_fp, ctx->register_ip, |
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62 | ctx->register_sp, ctx->register_lr - 4); |
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63 | printk("----------------------------------------------------------\n\r"); |
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64 | #endif |
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65 | if (_ISR_Nest_level > 0) { |
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66 | /* |
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67 | * In this case we shall not delete the task interrupted as |
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68 | * it has nothing to do with the fault. We cannot return either |
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69 | * because the eip points to the faulty instruction so... |
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70 | */ |
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71 | printk("Exception while executing ISR!!!. System locked\n\r"); |
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72 | while(1); |
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73 | } |
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74 | else { |
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75 | printk("*********** FAULTY THREAD WILL BE DELETED **************\n\r"); |
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76 | rtems_task_delete(_Thread_Executing->Object.id); |
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77 | } |
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78 | } |
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79 | |
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80 | typedef void (*cpuExcHandlerType) (CPU_Exception_frame*); |
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81 | |
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82 | cpuExcHandlerType _currentExcHandler = _defaultExcHandler; |
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83 | |
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84 | extern void _Exception_Handler_Undef_Swi(void); |
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85 | extern void _Exception_Handler_Abort(void); |
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86 | extern void _exc_data_abort(void); |
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87 | |
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88 | |
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89 | |
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90 | /* FIXME: put comments here */ |
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91 | void rtems_exception_init_mngt(void) |
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92 | { |
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93 | ISR_Level level; |
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94 | |
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95 | _CPU_ISR_Disable(level); |
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96 | _CPU_ISR_install_vector(ARM_EXCEPTION_UNDEF, |
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97 | _Exception_Handler_Undef_Swi, |
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98 | NULL); |
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99 | |
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100 | _CPU_ISR_install_vector(ARM_EXCEPTION_SWI, |
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101 | _Exception_Handler_Undef_Swi, |
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102 | NULL); |
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103 | |
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104 | _CPU_ISR_install_vector(ARM_EXCEPTION_PREF_ABORT, |
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105 | _Exception_Handler_Abort, |
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106 | NULL); |
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107 | |
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108 | _CPU_ISR_install_vector(ARM_EXCEPTION_DATA_ABORT, |
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109 | _exc_data_abort, |
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110 | NULL); |
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111 | |
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112 | _CPU_ISR_install_vector(ARM_EXCEPTION_FIQ, |
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113 | _Exception_Handler_Abort, |
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114 | NULL); |
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115 | |
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116 | _CPU_ISR_install_vector(ARM_EXCEPTION_IRQ, |
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117 | _Exception_Handler_Abort, |
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118 | NULL); |
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119 | |
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120 | _CPU_ISR_Enable(level); |
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121 | } |
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