1 | /** |
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2 | * @file |
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3 | * |
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4 | * @ingroup ppc_exc |
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5 | * |
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6 | * @brief PowerPC Exceptions implementation. |
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7 | */ |
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8 | |
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9 | /* |
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10 | * Copyright (C) 1999 Eric Valette (valette@crf.canon.fr) |
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11 | * Canon Centre Recherche France. |
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12 | * |
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13 | * Derived from file "libcpu/powerpc/new-exceptions/bspsupport/vectors_init.c". |
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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.org/license/LICENSE. |
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18 | */ |
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19 | |
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20 | #include <bsp/vectors.h> |
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21 | |
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22 | #include <rtems/score/threaddispatch.h> |
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23 | |
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24 | #include <inttypes.h> |
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25 | |
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26 | #ifndef __SPE__ |
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27 | #define GET_GPR(gpr) (gpr) |
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28 | #else |
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29 | #define GET_GPR(gpr) ((uint32_t) ((gpr) >> 32)) |
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30 | #endif |
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31 | |
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32 | /* T. Straumann: provide a stack trace |
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33 | * <strauman@slac.stanford.edu>, 6/26/2001 |
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34 | */ |
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35 | typedef struct LRFrameRec_ { |
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36 | struct LRFrameRec_ *frameLink; |
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37 | unsigned long *lr; |
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38 | } LRFrameRec, *LRFrame; |
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39 | |
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40 | #define STACK_CLAMP 50 /* in case we have a corrupted bottom */ |
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41 | |
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42 | static uint32_t ppc_exc_get_DAR_dflt(void) |
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43 | { |
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44 | if (ppc_cpu_is_60x()) |
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45 | return PPC_SPECIAL_PURPOSE_REGISTER(PPC_DAR); |
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46 | else |
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47 | switch (ppc_cpu_is_bookE()) { |
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48 | default: |
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49 | break; |
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50 | case PPC_BOOKE_STD: |
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51 | case PPC_BOOKE_E500: |
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52 | return PPC_SPECIAL_PURPOSE_REGISTER(BOOKE_DEAR); |
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53 | case PPC_BOOKE_405: |
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54 | return PPC_SPECIAL_PURPOSE_REGISTER(PPC405_DEAR); |
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55 | } |
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56 | return 0xdeadbeef; |
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57 | } |
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58 | |
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59 | uint32_t (*ppc_exc_get_DAR)(void) = ppc_exc_get_DAR_dflt; |
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60 | |
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61 | void BSP_printStackTrace(const BSP_Exception_frame *excPtr) |
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62 | { |
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63 | LRFrame f; |
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64 | int i; |
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65 | LRFrame sp; |
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66 | void *lr; |
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67 | |
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68 | printk("Stack Trace: \n "); |
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69 | if (excPtr) { |
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70 | printk("IP: 0x%08" PRIxPTR ", ", excPtr->EXC_SRR0); |
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71 | sp = (LRFrame) GET_GPR(excPtr->GPR1); |
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72 | lr = (void *) excPtr->EXC_LR; |
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73 | } else { |
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74 | /* there's no macro for this */ |
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75 | __asm__ __volatile__("mr %0, 1":"=r"(sp)); |
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76 | lr = (LRFrame) ppc_link_register(); |
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77 | } |
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78 | printk("LR: 0x%08" PRIxPTR "\n", (uintptr_t) lr); |
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79 | for (f = (LRFrame) sp, i = 0; f->frameLink && i < STACK_CLAMP; f = f->frameLink) { |
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80 | printk("--^ 0x%08" PRIxPTR "", (uintptr_t) (f->frameLink->lr)); |
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81 | if (!(++i % 5)) |
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82 | printk("\n"); |
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83 | } |
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84 | if (i >= STACK_CLAMP) { |
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85 | printk("Too many stack frames (stack possibly corrupted), giving up...\n"); |
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86 | } else { |
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87 | if (i % 5) |
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88 | printk("\n"); |
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89 | } |
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90 | } |
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91 | |
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92 | void _CPU_Exception_frame_print(const CPU_Exception_frame *excPtr) |
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93 | { |
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94 | const Thread_Control *executing = _Thread_Executing; |
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95 | bool synch = (int) excPtr->_EXC_number >= 0; |
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96 | unsigned n = excPtr->_EXC_number & 0x7fff; |
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97 | |
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98 | printk("exception vector %d (0x%x)\n", n, n); |
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99 | printk(" next PC or address of fault = 0x%08" PRIxPTR "\n", excPtr->EXC_SRR0); |
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100 | printk(" saved MSR = 0x%08" PRIxPTR "\n", excPtr->EXC_SRR1); |
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101 | |
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102 | /* Try to find out more about the context where this happened */ |
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103 | printk( |
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104 | " context = %s, ISR nest level = %" PRIu32 "\n", |
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105 | _ISR_Nest_level == 0 ? "task" : "interrupt", |
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106 | _ISR_Nest_level |
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107 | ); |
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108 | printk( |
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109 | " thread dispatch disable level = %" PRIu32 "\n", |
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110 | _Thread_Dispatch_disable_level |
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111 | ); |
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112 | |
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113 | /* Dump registers */ |
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114 | |
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115 | printk(" R0 = 0x%08" PRIxPTR "", GET_GPR(excPtr->GPR0)); |
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116 | if (synch) { |
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117 | printk(" R1 = 0x%08" PRIxPTR "", GET_GPR(excPtr->GPR1)); |
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118 | printk(" R2 = 0x%08" PRIxPTR "", GET_GPR(excPtr->GPR2)); |
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119 | } else { |
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120 | printk(" "); |
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121 | printk(" "); |
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122 | } |
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123 | printk(" R3 = 0x%08" PRIxPTR "\n", GET_GPR(excPtr->GPR3)); |
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124 | printk(" R4 = 0x%08" PRIxPTR "", GET_GPR(excPtr->GPR4)); |
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125 | printk(" R5 = 0x%08" PRIxPTR "", GET_GPR(excPtr->GPR5)); |
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126 | printk(" R6 = 0x%08" PRIxPTR "", GET_GPR(excPtr->GPR6)); |
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127 | printk(" R7 = 0x%08" PRIxPTR "\n", GET_GPR(excPtr->GPR7)); |
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128 | printk(" R8 = 0x%08" PRIxPTR "", GET_GPR(excPtr->GPR8)); |
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129 | printk(" R9 = 0x%08" PRIxPTR "", GET_GPR(excPtr->GPR9)); |
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130 | printk(" R10 = 0x%08" PRIxPTR "", GET_GPR(excPtr->GPR10)); |
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131 | printk(" R11 = 0x%08" PRIxPTR "\n", GET_GPR(excPtr->GPR11)); |
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132 | printk(" R12 = 0x%08" PRIxPTR "", GET_GPR(excPtr->GPR12)); |
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133 | if (synch) { |
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134 | printk(" R13 = 0x%08" PRIxPTR "", GET_GPR(excPtr->GPR13)); |
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135 | printk(" R14 = 0x%08" PRIxPTR "", GET_GPR(excPtr->GPR14)); |
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136 | printk(" R15 = 0x%08" PRIxPTR "\n", GET_GPR(excPtr->GPR15)); |
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137 | printk(" R16 = 0x%08" PRIxPTR "", GET_GPR(excPtr->GPR16)); |
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138 | printk(" R17 = 0x%08" PRIxPTR "", GET_GPR(excPtr->GPR17)); |
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139 | printk(" R18 = 0x%08" PRIxPTR "", GET_GPR(excPtr->GPR18)); |
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140 | printk(" R19 = 0x%08" PRIxPTR "\n", GET_GPR(excPtr->GPR19)); |
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141 | printk(" R20 = 0x%08" PRIxPTR "", GET_GPR(excPtr->GPR20)); |
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142 | printk(" R21 = 0x%08" PRIxPTR "", GET_GPR(excPtr->GPR21)); |
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143 | printk(" R22 = 0x%08" PRIxPTR "", GET_GPR(excPtr->GPR22)); |
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144 | printk(" R23 = 0x%08" PRIxPTR "\n", GET_GPR(excPtr->GPR23)); |
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145 | printk(" R24 = 0x%08" PRIxPTR "", GET_GPR(excPtr->GPR24)); |
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146 | printk(" R25 = 0x%08" PRIxPTR "", GET_GPR(excPtr->GPR25)); |
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147 | printk(" R26 = 0x%08" PRIxPTR "", GET_GPR(excPtr->GPR26)); |
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148 | printk(" R27 = 0x%08" PRIxPTR "\n", GET_GPR(excPtr->GPR27)); |
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149 | printk(" R28 = 0x%08" PRIxPTR "", GET_GPR(excPtr->GPR28)); |
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150 | printk(" R29 = 0x%08" PRIxPTR "", GET_GPR(excPtr->GPR29)); |
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151 | printk(" R30 = 0x%08" PRIxPTR "", GET_GPR(excPtr->GPR30)); |
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152 | printk(" R31 = 0x%08" PRIxPTR "\n", GET_GPR(excPtr->GPR31)); |
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153 | } else { |
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154 | printk("\n"); |
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155 | } |
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156 | printk(" CR = 0x%08" PRIx32 "\n", excPtr->EXC_CR); |
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157 | printk(" CTR = 0x%08" PRIxPTR "\n", excPtr->EXC_CTR); |
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158 | printk(" XER = 0x%08" PRIx32 "\n", excPtr->EXC_XER); |
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159 | printk(" LR = 0x%08" PRIxPTR "\n", excPtr->EXC_LR); |
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160 | |
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161 | /* Would be great to print DAR but unfortunately, |
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162 | * that is not portable across different CPUs. |
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163 | * AFAIK on classic PPC DAR is SPR 19, on the |
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164 | * 405 we have DEAR = SPR 0x3d5 and bookE says |
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165 | * DEAR = SPR 61 :-( |
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166 | */ |
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167 | if (ppc_exc_get_DAR != NULL) { |
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168 | char* reg = ppc_cpu_is_60x() ? " DAR" : "DEAR"; |
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169 | printk(" %s = 0x%08" PRIx32 "\n", reg, ppc_exc_get_DAR()); |
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170 | } |
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171 | if (ppc_cpu_is_bookE()) { |
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172 | unsigned esr, mcsr; |
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173 | if (ppc_cpu_is_bookE() == PPC_BOOKE_405) { |
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174 | esr = PPC_SPECIAL_PURPOSE_REGISTER(PPC405_ESR); |
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175 | mcsr = PPC_SPECIAL_PURPOSE_REGISTER(PPC405_MCSR); |
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176 | } else { |
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177 | esr = PPC_SPECIAL_PURPOSE_REGISTER(BOOKE_ESR); |
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178 | mcsr = PPC_SPECIAL_PURPOSE_REGISTER(BOOKE_MCSR); |
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179 | } |
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180 | printk(" ESR = 0x%08x\n", esr); |
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181 | printk(" MCSR = 0x%08x\n", mcsr); |
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182 | } |
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183 | |
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184 | #ifdef PPC_MULTILIB_ALTIVEC |
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185 | { |
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186 | unsigned char *v = (unsigned char *) &excPtr->V0; |
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187 | int i; |
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188 | int j; |
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189 | |
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190 | printk(" VSCR = 0x%08" PRIx32 "\n", excPtr->VSCR); |
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191 | printk("VRSAVE = 0x%08" PRIx32 "\n", excPtr->VRSAVE); |
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192 | |
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193 | for (i = 0; i < 32; ++i) { |
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194 | printk(" V%02i = 0x", i); |
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195 | |
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196 | for (j = 0; j < 16; ++j) { |
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197 | printk("%02x", v[j]); |
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198 | } |
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199 | |
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200 | printk("\n"); |
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201 | |
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202 | v += 16; |
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203 | } |
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204 | } |
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205 | #endif |
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206 | |
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207 | #ifdef PPC_MULTILIB_FPU |
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208 | { |
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209 | uint64_t *f = (uint64_t *) &excPtr->F0; |
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210 | int i; |
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211 | |
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212 | printk("FPSCR = 0x%08" PRIu64 "\n", excPtr->FPSCR); |
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213 | |
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214 | for (i = 0; i < 32; ++i) { |
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215 | printk(" F%02i = 0x%016" PRIu64 "\n", i, f[i]); |
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216 | } |
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217 | } |
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218 | #endif |
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219 | |
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220 | if (executing != NULL) { |
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221 | const char *name = (const char *) &executing->Object.name; |
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222 | |
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223 | printk( |
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224 | " executing thread ID = 0x%08" PRIx32 ", name = %c%c%c%c\n", |
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225 | executing->Object.id, |
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226 | name [0], |
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227 | name [1], |
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228 | name [2], |
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229 | name [3] |
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230 | ); |
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231 | } else { |
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232 | printk(" executing thread pointer is NULL"); |
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233 | } |
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234 | |
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235 | BSP_printStackTrace(excPtr); |
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236 | } |
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