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1 //============================================================================= |
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2 // |
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3 // hal_misc.c |
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4 // |
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5 // HAL miscellaneous functions |
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6 // |
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7 //============================================================================= |
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8 //####COPYRIGHTBEGIN#### |
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9 // |
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10 // ------------------------------------------- |
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11 // The contents of this file are subject to the Cygnus eCos Public License |
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12 // Version 1.0 (the "License"); you may not use this file except in |
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13 // compliance with the License. You may obtain a copy of the License at |
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14 // http://sourceware.cygnus.com/ecos |
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15 // |
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16 // Software distributed under the License is distributed on an "AS IS" |
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the |
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18 // License for the specific language governing rights and limitations under |
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19 // the License. |
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20 // |
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21 // The Original Code is eCos - Embedded Cygnus Operating System, released |
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22 // September 30, 1998. |
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23 // |
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24 // The Initial Developer of the Original Code is Cygnus. Portions created |
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25 // by Cygnus are Copyright (C) 1998 Cygnus Solutions. All Rights Reserved. |
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26 // ------------------------------------------- |
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27 // |
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28 //####COPYRIGHTEND#### |
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29 //============================================================================= |
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30 //#####DESCRIPTIONBEGIN#### |
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31 // |
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32 // Author(s): nickg |
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33 // Contributors: nickg |
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34 // Date: 1997-11-12 |
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35 // Purpose: HAL miscellaneous functions |
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36 // Description: This file contains miscellaneous functions provided by the |
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37 // HAL. |
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38 // |
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39 //####DESCRIPTIONEND#### |
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40 // |
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41 //============================================================================= |
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42 |
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43 #include <pkgconf/hal.h> |
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44 |
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45 #include <cyg/infra/cyg_type.h> |
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46 #include <cyg/infra/cyg_trac.h> // tracing macros |
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47 #include <cyg/infra/cyg_ass.h> // assertion macros |
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48 |
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49 #include <cyg/hal/hal_arch.h> // HAL header |
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50 |
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51 //--------------------------------------------------------------------------- |
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52 |
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53 void cyg_hal_invoke_constructors (void) |
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54 { |
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55 static int initialized = 0; |
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56 |
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57 if (! initialized) |
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58 { |
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59 typedef void (*pfunc) (void); |
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60 extern pfunc __CTOR_LIST__[]; |
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61 extern pfunc __CTOR_END__[]; |
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62 pfunc *p; |
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63 |
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64 initialized = 1; |
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65 |
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66 for (p = &__CTOR_END__[0]-1; p >= __CTOR_LIST__; p--){ |
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67 (*p) (); |
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68 } |
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69 } |
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70 } |
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71 |
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72 // Override any __eabi the compiler might generate. We don't want |
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73 // constructors to be called twice. |
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74 void __eabi (void) {} |
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75 |
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76 //--------------------------------------------------------------------------- |
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77 // First level C exception handler. |
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78 |
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79 externC void __handle_exception (void); |
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80 |
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81 externC HAL_SavedRegisters *_hal_registers; |
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82 |
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83 void exception_handler(HAL_SavedRegisters *regs) |
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84 { |
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85 #ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS |
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86 |
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87 // Set the pointer to the registers of the current exception |
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88 // context. At entry the GDB stub will expand the |
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89 // HAL_SavedRegisters structure into a (bigger) register array. |
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90 _hal_registers = regs; |
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91 |
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92 __handle_exception(); |
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93 |
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94 #elif defined(CYGFUN_HAL_COMMON_KERNEL_SUPPORT) && defined(CYGPKG_HAL_EXCEPTIONS) |
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95 |
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96 // We should decode the vector and pass a more appropriate |
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97 // value as the second argument. For now we simply pass a |
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98 // pointer to the saved registers. We should also divert |
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99 // breakpoint and other debug vectors into the debug stubs. |
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100 |
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101 deliver_exception( regs->vector>>8, (CYG_ADDRWORD)regs ); |
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102 |
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103 #else |
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104 |
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105 CYG_FAIL("Exception!!!"); |
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106 |
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107 #endif |
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108 |
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109 return; |
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110 } |
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111 |
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112 //--------------------------------------------------------------------------- |
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113 // Default ISR |
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114 |
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115 externC cyg_uint32 hal_default_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data) |
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116 { |
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117 CYG_TRACE1(true, "Interrupt: %d", vector); |
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118 CYG_FAIL("Spurious Interrupt!!!"); |
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119 return 0; |
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120 } |
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121 |
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122 //--------------------------------------------------------------------------- |
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123 // Idle thread action |
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124 |
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125 void hal_idle_thread_action( cyg_uint32 count ) |
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126 { |
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127 } |
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128 |
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129 //--------------------------------------------------------------------------- |
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130 // End of hal_misc.c |
