1 | /* |
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2 | * vectors_init.c Exception hanlding initialisation (and generic handler). |
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3 | * |
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4 | * This include file describe the data structure and the functions implemented |
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5 | * by rtems to handle exceptions. |
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6 | * |
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7 | * |
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8 | * MPC5xx port sponsored by Defence Research and Development Canada - Suffield |
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9 | * Copyright (C) 2004, Real-Time Systems Inc. (querbach@realtime.bc.ca) |
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10 | * |
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11 | * Derived from libbsp/powerpc/mbx8xx/vectors/vectors_init.c: |
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12 | * |
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13 | * CopyRight (C) 1999 valette@crf.canon.fr |
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14 | * |
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15 | * The license and distribution terms for this file may be |
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16 | * found in the file LICENSE in this distribution or at |
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17 | * http://www.rtems.com/license/LICENSE. |
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18 | * |
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19 | * $Id$ |
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20 | */ |
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21 | #include <rtems/bspIo.h> |
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22 | #include <libcpu/vectors.h> |
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23 | #include <libcpu/raw_exception.h> |
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24 | |
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25 | extern rtems_exception_handler_t default_exception_handler; |
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26 | |
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27 | static rtems_raw_except_global_settings exception_config; |
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28 | static rtems_raw_except_connect_data exception_table[NUM_EXCEPTIONS]; |
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29 | rtems_exception_handler_t* exception_handler_table[NUM_EXCEPTIONS]; |
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30 | |
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31 | |
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32 | void C_default_exception_handler(CPU_Exception_frame* excPtr) |
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33 | { |
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34 | int recoverable = 0; |
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35 | |
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36 | printk("exception handler called for exception %d\n", excPtr->_EXC_number); |
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37 | printk("\t Next PC or Address of fault = %x\n", excPtr->EXC_SRR0); |
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38 | printk("\t Saved MSR = %x\n", excPtr->EXC_SRR1); |
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39 | printk("\t R0 = %x\n", excPtr->GPR0); |
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40 | printk("\t R1 = %x\n", excPtr->GPR1); |
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41 | printk("\t R2 = %x\n", excPtr->GPR2); |
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42 | printk("\t R3 = %x\n", excPtr->GPR3); |
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43 | printk("\t R4 = %x\n", excPtr->GPR4); |
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44 | printk("\t R5 = %x\n", excPtr->GPR5); |
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45 | printk("\t R6 = %x\n", excPtr->GPR6); |
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46 | printk("\t R7 = %x\n", excPtr->GPR7); |
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47 | printk("\t R8 = %x\n", excPtr->GPR8); |
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48 | printk("\t R9 = %x\n", excPtr->GPR9); |
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49 | printk("\t R10 = %x\n", excPtr->GPR10); |
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50 | printk("\t R11 = %x\n", excPtr->GPR11); |
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51 | printk("\t R12 = %x\n", excPtr->GPR12); |
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52 | printk("\t R13 = %x\n", excPtr->GPR13); |
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53 | printk("\t R14 = %x\n", excPtr->GPR14); |
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54 | printk("\t R15 = %x\n", excPtr->GPR15); |
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55 | printk("\t R16 = %x\n", excPtr->GPR16); |
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56 | printk("\t R17 = %x\n", excPtr->GPR17); |
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57 | printk("\t R18 = %x\n", excPtr->GPR18); |
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58 | printk("\t R19 = %x\n", excPtr->GPR19); |
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59 | printk("\t R20 = %x\n", excPtr->GPR20); |
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60 | printk("\t R21 = %x\n", excPtr->GPR21); |
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61 | printk("\t R22 = %x\n", excPtr->GPR22); |
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62 | printk("\t R23 = %x\n", excPtr->GPR23); |
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63 | printk("\t R24 = %x\n", excPtr->GPR24); |
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64 | printk("\t R25 = %x\n", excPtr->GPR25); |
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65 | printk("\t R26 = %x\n", excPtr->GPR26); |
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66 | printk("\t R27 = %x\n", excPtr->GPR27); |
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67 | printk("\t R28 = %x\n", excPtr->GPR28); |
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68 | printk("\t R29 = %x\n", excPtr->GPR29); |
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69 | printk("\t R30 = %x\n", excPtr->GPR30); |
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70 | printk("\t R31 = %x\n", excPtr->GPR31); |
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71 | printk("\t CR = %x\n", excPtr->EXC_CR); |
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72 | printk("\t CTR = %x\n", excPtr->EXC_CTR); |
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73 | printk("\t XER = %x\n", excPtr->EXC_XER); |
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74 | printk("\t LR = %x\n", excPtr->EXC_LR); |
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75 | printk("\t MSR = %x\n", excPtr->EXC_MSR); |
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76 | if (excPtr->_EXC_number == ASM_DEC_VECTOR) |
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77 | recoverable = 1; |
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78 | if (excPtr->_EXC_number == ASM_SYS_VECTOR) |
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79 | #ifdef TEST_RAW_EXCEPTION_CODE |
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80 | recoverable = 1; |
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81 | #else |
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82 | recoverable = 0; |
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83 | #endif |
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84 | if (!recoverable) { |
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85 | printk("unrecoverable exception!!! Push reset button\n"); |
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86 | while(1); |
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87 | } |
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88 | } |
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89 | |
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90 | void nop_except_enable(const rtems_raw_except_connect_data* ptr) |
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91 | { |
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92 | } |
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93 | |
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94 | int except_always_enabled(const rtems_raw_except_connect_data* ptr) |
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95 | { |
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96 | return 1; |
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97 | } |
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98 | |
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99 | void initialize_exceptions(void) |
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100 | { |
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101 | int i; |
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102 | |
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103 | /* |
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104 | * Initialize all entries of the exception table with a description of the |
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105 | * default exception handler. |
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106 | */ |
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107 | exception_config.exceptSize = NUM_EXCEPTIONS; |
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108 | exception_config.rawExceptHdlTbl = &exception_table[0]; |
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109 | exception_config.defaultRawEntry.exceptIndex = 0; |
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110 | exception_config.defaultRawEntry.hdl.vector = 0; |
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111 | exception_config.defaultRawEntry.hdl.raw_hdl = default_exception_handler; |
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112 | |
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113 | for (i = 0; i < exception_config.exceptSize; i++) { |
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114 | printk("installing exception number %d\n", i); |
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115 | exception_table[i].exceptIndex = i; |
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116 | exception_table[i].hdl = exception_config.defaultRawEntry.hdl; |
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117 | exception_table[i].hdl.vector = i; |
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118 | exception_table[i].on = nop_except_enable; |
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119 | exception_table[i].off = nop_except_enable; |
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120 | exception_table[i].isOn = except_always_enabled; |
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121 | } |
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122 | |
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123 | /* |
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124 | * Now pass the initialized exception table to the exceptions module which |
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125 | * will install the handler pointers in the exception handler table. |
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126 | */ |
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127 | if (!mpc5xx_init_exceptions(&exception_config)) { |
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128 | /* |
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129 | * At this stage we may not call CPU_Panic because it uses exceptions!!! |
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130 | */ |
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131 | printk("Exception handling initialization failed\n"); |
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132 | printk("System locked\n"); while(1); |
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133 | } |
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134 | else { |
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135 | printk("Exception handling initialization done\n"); |
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136 | } |
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137 | } |
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