[7e32b62] | 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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[c499856] | 17 | * http://www.rtems.org/license/LICENSE. |
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[7e32b62] | 18 | */ |
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| 19 | |
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| 20 | #include <bsp/vectors.h> |
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| 21 | |
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[0c3edbf] | 22 | #include <rtems/score/threaddispatch.h> |
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| 23 | |
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[7e32b62] | 24 | #ifndef __SPE__ |
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| 25 | #define GET_GPR(gpr) (gpr) |
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| 26 | #else |
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| 27 | #define GET_GPR(gpr) ((int) ((gpr) >> 32)) |
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| 28 | #endif |
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| 29 | |
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| 30 | /* T. Straumann: provide a stack trace |
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| 31 | * <strauman@slac.stanford.edu>, 6/26/2001 |
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| 32 | */ |
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| 33 | typedef struct LRFrameRec_ { |
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| 34 | struct LRFrameRec_ *frameLink; |
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| 35 | unsigned long *lr; |
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| 36 | } LRFrameRec, *LRFrame; |
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| 37 | |
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| 38 | #define STACK_CLAMP 50 /* in case we have a corrupted bottom */ |
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| 39 | |
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| 40 | static uint32_t ppc_exc_get_DAR_dflt(void) |
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| 41 | { |
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| 42 | if (ppc_cpu_is_60x()) |
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| 43 | return PPC_SPECIAL_PURPOSE_REGISTER(PPC_DAR); |
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| 44 | else |
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| 45 | switch (ppc_cpu_is_bookE()) { |
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| 46 | default: |
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| 47 | break; |
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| 48 | case PPC_BOOKE_STD: |
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| 49 | case PPC_BOOKE_E500: |
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[809b726a] | 50 | return PPC_SPECIAL_PURPOSE_REGISTER(BOOKE_DEAR); |
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[7e32b62] | 51 | case PPC_BOOKE_405: |
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[809b726a] | 52 | return PPC_SPECIAL_PURPOSE_REGISTER(PPC405_DEAR); |
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[7e32b62] | 53 | } |
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| 54 | return 0xdeadbeef; |
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| 55 | } |
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| 56 | |
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| 57 | uint32_t (*ppc_exc_get_DAR)(void) = ppc_exc_get_DAR_dflt; |
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| 58 | |
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| 59 | void BSP_printStackTrace(const BSP_Exception_frame *excPtr) |
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| 60 | { |
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| 61 | LRFrame f; |
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| 62 | int i; |
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| 63 | LRFrame sp; |
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| 64 | void *lr; |
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| 65 | |
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| 66 | printk("Stack Trace: \n "); |
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| 67 | if (excPtr) { |
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| 68 | printk("IP: 0x%08x, ", excPtr->EXC_SRR0); |
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| 69 | sp = (LRFrame) GET_GPR(excPtr->GPR1); |
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| 70 | lr = (void *) excPtr->EXC_LR; |
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| 71 | } else { |
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| 72 | /* there's no macro for this */ |
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| 73 | __asm__ __volatile__("mr %0, 1":"=r"(sp)); |
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| 74 | lr = (LRFrame) ppc_link_register(); |
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| 75 | } |
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| 76 | printk("LR: 0x%08x\n", lr); |
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| 77 | for (f = (LRFrame) sp, i = 0; f->frameLink && i < STACK_CLAMP; f = f->frameLink) { |
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| 78 | printk("--^ 0x%08x", (long) (f->frameLink->lr)); |
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| 79 | if (!(++i % 5)) |
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| 80 | printk("\n"); |
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| 81 | } |
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| 82 | if (i >= STACK_CLAMP) { |
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| 83 | printk("Too many stack frames (stack possibly corrupted), giving up...\n"); |
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| 84 | } else { |
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| 85 | if (i % 5) |
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| 86 | printk("\n"); |
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| 87 | } |
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| 88 | } |
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| 89 | |
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[c48cf0bd] | 90 | void _CPU_Exception_frame_print(const CPU_Exception_frame *excPtr) |
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[7e32b62] | 91 | { |
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| 92 | const Thread_Control *executing = _Thread_Executing; |
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| 93 | bool synch = (int) excPtr->_EXC_number >= 0; |
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| 94 | unsigned n = excPtr->_EXC_number & 0x7fff; |
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| 95 | |
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| 96 | printk("exception vector %d (0x%x)\n", n, n); |
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| 97 | printk(" next PC or address of fault = 0x%08x\n", excPtr->EXC_SRR0); |
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| 98 | printk(" saved MSR = 0x%08x\n", excPtr->EXC_SRR1); |
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| 99 | |
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| 100 | /* Try to find out more about the context where this happened */ |
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| 101 | printk( |
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| 102 | " context = %s, ISR nest level = %u\n", |
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| 103 | _ISR_Nest_level == 0 ? "task" : "interrupt", |
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| 104 | _ISR_Nest_level |
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| 105 | ); |
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| 106 | printk( |
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| 107 | " thread dispatch disable level = %u\n", |
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| 108 | _Thread_Dispatch_disable_level |
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| 109 | ); |
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| 110 | |
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| 111 | /* Dump registers */ |
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| 112 | |
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| 113 | printk(" R0 = 0x%08x", GET_GPR(excPtr->GPR0)); |
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| 114 | if (synch) { |
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| 115 | printk(" R1 = 0x%08x", GET_GPR(excPtr->GPR1)); |
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| 116 | printk(" R2 = 0x%08x", GET_GPR(excPtr->GPR2)); |
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| 117 | } else { |
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| 118 | printk(" "); |
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| 119 | printk(" "); |
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| 120 | } |
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| 121 | printk(" R3 = 0x%08x\n", GET_GPR(excPtr->GPR3)); |
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| 122 | printk(" R4 = 0x%08x", GET_GPR(excPtr->GPR4)); |
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| 123 | printk(" R5 = 0x%08x", GET_GPR(excPtr->GPR5)); |
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| 124 | printk(" R6 = 0x%08x", GET_GPR(excPtr->GPR6)); |
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| 125 | printk(" R7 = 0x%08x\n", GET_GPR(excPtr->GPR7)); |
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| 126 | printk(" R8 = 0x%08x", GET_GPR(excPtr->GPR8)); |
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| 127 | printk(" R9 = 0x%08x", GET_GPR(excPtr->GPR9)); |
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| 128 | printk(" R10 = 0x%08x", GET_GPR(excPtr->GPR10)); |
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| 129 | printk(" R11 = 0x%08x\n", GET_GPR(excPtr->GPR11)); |
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| 130 | printk(" R12 = 0x%08x", GET_GPR(excPtr->GPR12)); |
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| 131 | if (synch) { |
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| 132 | printk(" R13 = 0x%08x", GET_GPR(excPtr->GPR13)); |
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| 133 | printk(" R14 = 0x%08x", GET_GPR(excPtr->GPR14)); |
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| 134 | printk(" R15 = 0x%08x\n", GET_GPR(excPtr->GPR15)); |
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| 135 | printk(" R16 = 0x%08x", GET_GPR(excPtr->GPR16)); |
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| 136 | printk(" R17 = 0x%08x", GET_GPR(excPtr->GPR17)); |
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| 137 | printk(" R18 = 0x%08x", GET_GPR(excPtr->GPR18)); |
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| 138 | printk(" R19 = 0x%08x\n", GET_GPR(excPtr->GPR19)); |
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| 139 | printk(" R20 = 0x%08x", GET_GPR(excPtr->GPR20)); |
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| 140 | printk(" R21 = 0x%08x", GET_GPR(excPtr->GPR21)); |
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| 141 | printk(" R22 = 0x%08x", GET_GPR(excPtr->GPR22)); |
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| 142 | printk(" R23 = 0x%08x\n", GET_GPR(excPtr->GPR23)); |
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| 143 | printk(" R24 = 0x%08x", GET_GPR(excPtr->GPR24)); |
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| 144 | printk(" R25 = 0x%08x", GET_GPR(excPtr->GPR25)); |
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| 145 | printk(" R26 = 0x%08x", GET_GPR(excPtr->GPR26)); |
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| 146 | printk(" R27 = 0x%08x\n", GET_GPR(excPtr->GPR27)); |
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| 147 | printk(" R28 = 0x%08x", GET_GPR(excPtr->GPR28)); |
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| 148 | printk(" R29 = 0x%08x", GET_GPR(excPtr->GPR29)); |
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| 149 | printk(" R30 = 0x%08x", GET_GPR(excPtr->GPR30)); |
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| 150 | printk(" R31 = 0x%08x\n", GET_GPR(excPtr->GPR31)); |
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| 151 | } else { |
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| 152 | printk("\n"); |
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| 153 | } |
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| 154 | printk(" CR = 0x%08x\n", excPtr->EXC_CR); |
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| 155 | printk(" CTR = 0x%08x\n", excPtr->EXC_CTR); |
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| 156 | printk(" XER = 0x%08x\n", excPtr->EXC_XER); |
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| 157 | printk(" LR = 0x%08x\n", excPtr->EXC_LR); |
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| 158 | |
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| 159 | /* Would be great to print DAR but unfortunately, |
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| 160 | * that is not portable across different CPUs. |
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| 161 | * AFAIK on classic PPC DAR is SPR 19, on the |
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[809b726a] | 162 | * 405 we have DEAR = SPR 0x3d5 and bookE says |
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[7e32b62] | 163 | * DEAR = SPR 61 :-( |
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| 164 | */ |
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| 165 | if (ppc_exc_get_DAR != NULL) { |
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[809b726a] | 166 | char* reg = ppc_cpu_is_60x() ? " DAR" : "DEAR"; |
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| 167 | printk(" %s = 0x%08x\n", reg, ppc_exc_get_DAR()); |
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| 168 | } |
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| 169 | if (ppc_cpu_is_bookE()) { |
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| 170 | unsigned esr, mcsr; |
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| 171 | if (ppc_cpu_is_bookE() == PPC_BOOKE_405) { |
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| 172 | esr = PPC_SPECIAL_PURPOSE_REGISTER(PPC405_ESR); |
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| 173 | mcsr = PPC_SPECIAL_PURPOSE_REGISTER(PPC405_MCSR); |
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| 174 | } else { |
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| 175 | esr = PPC_SPECIAL_PURPOSE_REGISTER(BOOKE_ESR); |
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| 176 | mcsr = PPC_SPECIAL_PURPOSE_REGISTER(BOOKE_MCSR); |
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| 177 | } |
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| 178 | printk(" ESR = 0x%08x\n", esr); |
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| 179 | printk(" MCSR = 0x%08x\n", mcsr); |
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[7e32b62] | 180 | } |
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| 181 | |
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[3e2647a7] | 182 | #ifdef PPC_MULTILIB_ALTIVEC |
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| 183 | { |
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| 184 | unsigned char *v = (unsigned char *) &excPtr->V0; |
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| 185 | int i; |
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| 186 | int j; |
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| 187 | |
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| 188 | printk(" VSCR = 0x%08x\n", excPtr->VSCR); |
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| 189 | printk("VRSAVE = 0x%08x\n", excPtr->VRSAVE); |
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| 190 | |
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| 191 | for (i = 0; i < 32; ++i) { |
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| 192 | printk(" V%02i = 0x", i); |
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| 193 | |
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| 194 | for (j = 0; j < 16; ++j) { |
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| 195 | printk("%02x", v[j]); |
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| 196 | } |
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| 197 | |
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| 198 | printk("\n"); |
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| 199 | |
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| 200 | v += 16; |
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| 201 | } |
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| 202 | } |
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| 203 | #endif |
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| 204 | |
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| 205 | #ifdef PPC_MULTILIB_FPU |
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| 206 | { |
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| 207 | unsigned long long *f = (unsigned long long *) &excPtr->F0; |
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| 208 | int i; |
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| 209 | |
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| 210 | printk("FPSCR = 0x%08llx\n", excPtr->FPSCR); |
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| 211 | |
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| 212 | for (i = 0; i < 32; ++i) { |
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| 213 | printk(" F%02i = 0x%016llx\n", i, f[i]); |
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| 214 | } |
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| 215 | } |
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| 216 | #endif |
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| 217 | |
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[7e32b62] | 218 | if (executing != NULL) { |
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| 219 | const char *name = (const char *) &executing->Object.name; |
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| 220 | |
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| 221 | printk( |
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| 222 | " executing thread ID = 0x%08x, name = %c%c%c%c\n", |
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| 223 | executing->Object.id, |
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| 224 | name [0], |
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| 225 | name [1], |
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| 226 | name [2], |
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| 227 | name [3] |
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| 228 | ); |
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| 229 | } else { |
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| 230 | printk(" executing thread pointer is NULL"); |
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| 231 | } |
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| 232 | |
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| 233 | BSP_printStackTrace(excPtr); |
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| 234 | } |
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