1 | /* |
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2 | * Internal Error Handler |
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3 | * |
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4 | * COPYRIGHT (c) 1989-1997. |
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5 | * On-Line Applications Research Corporation (OAR). |
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6 | * Copyright assigned to U.S. Government, 1994. |
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7 | * |
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8 | * The license and distribution terms for this file may be |
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9 | * found in the file LICENSE in this distribution or at |
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10 | * http://www.OARcorp.com/rtems/license.html. |
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11 | * |
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12 | * $Id$ |
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13 | */ |
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14 | |
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15 | #include <rtems/system.h> |
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16 | #include <rtems/score/interr.h> |
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17 | #include <rtems/score/sysstate.h> |
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18 | #include <rtems/score/userext.h> |
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19 | |
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20 | /*PAGE |
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21 | * |
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22 | * _Internal_error_Occurred |
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23 | * |
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24 | * This routine will invoke the fatal error handler supplied by the user |
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25 | * followed by the the default one provided by the executive. The default |
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26 | * error handler assumes no hardware is present to help inform the user |
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27 | * of the problem. Halt stores the error code in a known register, |
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28 | * disables interrupts, and halts the CPU. If the CPU does not have a |
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29 | * halt instruction, it will loop to itself. |
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30 | * |
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31 | * Input parameters: |
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32 | * the_source - what subsystem the error originated in |
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33 | * is_internal - if the error was internally generated |
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34 | * the_error - fatal error status code |
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35 | * |
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36 | * Output parameters: |
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37 | * As much information as possible is stored in a CPU dependent fashion. |
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38 | * See the CPU dependent code for more information. |
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39 | * |
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40 | * NOTE: The the_error is not necessarily a directive status code. |
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41 | */ |
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42 | |
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43 | /* |
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44 | * Ugly hack.... _CPU_Fatal_halt() disonnects the bdm. Without this |
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45 | * change, the_error is only known only to the cpu :). |
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46 | * |
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47 | * From "bsp.h" which is not yet available in the arch tree during |
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48 | * this phase of install. jsg |
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49 | */ |
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50 | void outbyte(char); |
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51 | void bsp_cleanup( void ); |
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52 | |
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53 | #define RAW_PUTS(str) \ |
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54 | { register char *ptr = str; \ |
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55 | while (*ptr) outbyte(*ptr++); \ |
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56 | } |
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57 | |
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58 | #define RAW_PUTI(n) { \ |
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59 | register int i, j; \ |
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60 | \ |
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61 | RAW_PUTS("0x"); \ |
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62 | for (i=28;i>=0;i -= 4) { \ |
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63 | j = (n>>i) & 0xf; \ |
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64 | outbyte( (j>9 ? j-10+'a' : j+'0') ); \ |
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65 | } \ |
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66 | } |
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67 | |
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68 | void volatile _Internal_error_Occurred( |
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69 | Internal_errors_Source the_source, |
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70 | boolean is_internal, |
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71 | unsigned32 the_error |
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72 | ) |
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73 | { |
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74 | |
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75 | Internal_errors_What_happened.the_source = the_source; |
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76 | Internal_errors_What_happened.is_internal = is_internal; |
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77 | Internal_errors_What_happened.the_error = the_error; |
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78 | |
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79 | _User_extensions_Fatal( the_source, is_internal, the_error ); |
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80 | |
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81 | _System_state_Set( SYSTEM_STATE_FAILED ); |
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82 | |
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83 | /* try to print error message to outbyte */ |
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84 | RAW_PUTS("\r\nRTEMS: A fatal error has occured.\r\n"); |
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85 | RAW_PUTS("RTEMS: fatal error "); |
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86 | RAW_PUTI( the_error ); |
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87 | RAW_PUTS(".\r\n"); |
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88 | |
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89 | /* configure peripherals for a safe exit */ |
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90 | bsp_cleanup(); |
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91 | |
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92 | _CPU_Fatal_halt( the_error ); |
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93 | |
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94 | /* will not return from this routine */ |
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95 | } |
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