1 | /* |
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2 | * vectors.h Exception frame related contant and API. |
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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.h: |
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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.org/license/LICENSE. |
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18 | */ |
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19 | #ifndef _LIBCPU_VECTORS_H |
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20 | #define _LIBCPU_VECTORS_H |
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21 | |
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22 | |
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23 | /* |
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24 | * Size of hardware vector table. |
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25 | */ |
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26 | #define NUM_EXCEPTIONS 0x20 |
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27 | |
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28 | /* |
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29 | * The callee (high level exception code written in C) |
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30 | * will store the Link Registers (return address) at entry r1 + 4 !!!. |
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31 | * So let room for it!!!. |
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32 | */ |
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33 | #define LINK_REGISTER_CALLEE_UPDATE_ROOM 4 |
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34 | #define SRR0_FRAME_OFFSET 8 |
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35 | #define SRR1_FRAME_OFFSET 12 |
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36 | #define EXCEPTION_NUMBER_OFFSET 16 |
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37 | #define EXC_CR_OFFSET 20 |
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38 | #define EXC_CTR_OFFSET 24 |
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39 | #define EXC_XER_OFFSET 28 |
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40 | #define EXC_LR_OFFSET 32 |
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41 | #define GPR0_OFFSET 36 |
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42 | #define GPR1_OFFSET 40 |
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43 | #define GPR2_OFFSET 44 |
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44 | #define GPR3_OFFSET 48 |
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45 | #define GPR4_OFFSET 52 |
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46 | #define GPR5_OFFSET 56 |
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47 | #define GPR6_OFFSET 60 |
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48 | #define GPR7_OFFSET 64 |
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49 | #define GPR8_OFFSET 68 |
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50 | #define GPR9_OFFSET 72 |
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51 | #define GPR10_OFFSET 76 |
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52 | #define GPR11_OFFSET 80 |
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53 | #define GPR12_OFFSET 84 |
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54 | #define GPR13_OFFSET 88 |
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55 | #define GPR14_OFFSET 92 |
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56 | #define GPR15_OFFSET 96 |
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57 | #define GPR16_OFFSET 100 |
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58 | #define GPR17_OFFSET 104 |
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59 | #define GPR18_OFFSET 108 |
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60 | #define GPR19_OFFSET 112 |
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61 | #define GPR20_OFFSET 116 |
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62 | #define GPR21_OFFSET 120 |
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63 | #define GPR22_OFFSET 124 |
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64 | #define GPR23_OFFSET 128 |
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65 | #define GPR24_OFFSET 132 |
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66 | #define GPR25_OFFSET 136 |
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67 | #define GPR26_OFFSET 140 |
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68 | #define GPR27_OFFSET 144 |
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69 | #define GPR28_OFFSET 148 |
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70 | #define GPR29_OFFSET 152 |
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71 | #define GPR30_OFFSET 156 |
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72 | #define GPR31_OFFSET 160 |
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73 | /* |
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74 | * maintain the EABI requested 8 bytes aligment |
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75 | * As SVR4 ABI requires 16, make it 16 (as some |
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76 | * exception may need more registers to be processed...) |
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77 | */ |
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78 | #define EXCEPTION_FRAME_END 176 |
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79 | |
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80 | #ifndef ASM |
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81 | |
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82 | #include <rtems.h> |
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83 | |
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84 | /* |
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85 | * default raw exception handlers |
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86 | */ |
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87 | |
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88 | extern void default_exception_vector_code_prolog(void); |
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89 | extern int default_exception_vector_code_prolog_size; |
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90 | extern void initialize_exceptions(void); |
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91 | |
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92 | typedef void rtems_exception_handler_t (CPU_Exception_frame* excPtr); |
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93 | /*DEBUG typedef rtems_exception_handler_t cpuExcHandlerType; */ |
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94 | |
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95 | /* |
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96 | * Exception handler table. |
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97 | * |
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98 | * This table contains pointers to assembly-language exception handlers. |
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99 | * The common exception prologue in vectors.S looks up an entry in this |
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100 | * table and jumps to it. No return address is saved, so the handlers in |
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101 | * this table must return directly to the interrupted code. |
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102 | * |
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103 | * On entry to an exception handler, R1 points to a new exception stack |
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104 | * frame in which R3, R4, and LR have been saved. R4 holds the exception |
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105 | * number. |
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106 | */ |
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107 | extern rtems_exception_handler_t* exception_handler_table[NUM_EXCEPTIONS]; |
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108 | |
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109 | /* for compatability -- XXX remove */ |
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110 | typedef rtems_exception_handler_t *cpuExcHandlerType; |
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111 | extern cpuExcHandlerType *globalExceptHdl; |
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112 | |
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113 | #endif /* ASM */ |
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114 | |
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115 | #endif /* _LIBCPU_VECTORS_H */ |
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