[8430205] | 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 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() |
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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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