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annotate packages/hal/common/current/src/hal_misc.c @ 101:c37d3a9e1b28 ecos-sw-2000-06-16

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Merge from eCos master repository on 2000-06-16-07:47:03-BST
author jlarmour
date Fri, 16 Jun 2000 16:43:59 +0000
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children 5a0cc6c243a9
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101
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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 // Common 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 Red Hat eCos Public License
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12 // Version 1.1 (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://www.redhat.com/
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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 Configurable Operating System,
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22 // released September 30, 1998.
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23 //
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24 // The Initial Developer of the Original Code is Red Hat.
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25 // Portions created by Red Hat are
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26 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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27 // All Rights Reserved.
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28 // -------------------------------------------
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29 //
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30 //####COPYRIGHTEND####
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31 //==========================================================================
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32 //#####DESCRIPTIONBEGIN####
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33 //
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34 // Author(s): nickg
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35 // Contributors: nickg, jskov
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36 // Date: 2000-06-08
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37 // Purpose: HAL miscellaneous functions
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38 // Description: This file contains miscellaneous functions provided by the
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39 // HAL.
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40 //
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41 //####DESCRIPTIONEND####
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42 //
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43 //========================================================================*/
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44
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45 #include <pkgconf/hal.h>
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46
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47 #include <cyg/hal/hal_arch.h>
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48 #include <cyg/hal/hal_if.h>
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49
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50 #include <cyg/hal/hal_intr.h>
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51 #include <cyg/hal/hal_misc.h> // our header
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52
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53 #include <cyg/infra/cyg_type.h> // Base types
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54 #include <cyg/infra/cyg_trac.h> // tracing macros
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55 #include <cyg/infra/cyg_ass.h> // assertion macros
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56
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57 //--------------------------------------------------------------------------
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58
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59 //--------------------------------------------------------------------------
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60 // Macro for finding return address.
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61 #ifndef CYGARC_HAL_GET_RETURN_ADDRESS
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62
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63 #define CYGARC_HAL_GET_RETURN_ADDRESS(_x_) \
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64 (_x_) = (CYG_ADDRWORD)&&__backup_return_address
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65
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66 #define CYGARC_HAL_GET_RETURN_ADDRESS_BACKUP() \
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67 __backup_return_address:
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68
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69 #endif
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70
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71 //--------------------------------------------------------------------------
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72 // Functions to support the detection and execution of a user provoked
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73 // program break. These are usually called from interrupt routines.
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74
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75 cyg_bool
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76 cyg_hal_is_break(char *buf, int size)
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77 {
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78 while( size )
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79 if( buf[--size] == 0x03 ) return true;
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80
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81 return false;
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82 }
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83
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84 void
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85 cyg_hal_user_break( CYG_ADDRWORD *regs )
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86 {
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87 #if defined(CYGSEM_HAL_USE_ROM_MONITOR_GDB_stubs) \
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88 || defined(CYGSEM_HAL_USE_ROM_MONITOR_CygMon) \
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89 || defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)
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90
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91 CYG_ADDRWORD __ra;
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92 CYG_WORD32 __pc;
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93 HAL_SavedRegisters *sreg = (HAL_SavedRegisters *)regs;
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94
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95 CYGARC_HAL_GET_RETURN_ADDRESS(__ra);
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96
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97 if( regs == NULL ) __pc = __ra;
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98 else __pc = sreg->pc;
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99
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100 CYGACC_CALL_IF_INSTALL_BPT_FN()((void *)__pc);
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101
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102 CYGARC_HAL_GET_RETURN_ADDRESS_BACKUP();
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103
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104 #else
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105
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106 HAL_BREAKPOINT(breakinst);
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107
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108 #endif
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109 }
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110
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111
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112 //--------------------------------------------------------------------------
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113 // The system default interrupt ISR. It calls the architecture default
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114 // ISR as well if necessary.
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115 externC cyg_uint32 hal_arch_default_isr(CYG_ADDRWORD vector,
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116 CYG_ADDRWORD data);
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117
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118 cyg_uint32
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119 hal_default_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data)
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120 {
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121 cyg_uint32 result;
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122
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123 #if (defined(CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT) \
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124 || defined(CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT)) && \
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125 defined(CYGHWR_HAL_GDB_PORT_VECTOR) && \
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126 defined(HAL_CTRLC_ISR)
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127
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128 #ifndef CYGIMP_HAL_COMMON_INTERRUPTS_CHAIN
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129 if( vector == CYGHWR_HAL_GDB_PORT_VECTOR )
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130 #endif
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131 {
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132 result = HAL_CTRLC_ISR( vector, data );
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133 if( 0 != result ) return result;
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134 }
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135 #endif
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136
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137 result = hal_arch_default_isr (vector, data);
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138 if( 0 != result) return result;
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139
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140 CYG_TRACE1(true, "Interrupt: %d", vector);
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141 CYG_FAIL("Spurious Interrupt!!!");
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142 return 0;
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143 }
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144
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145
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146 //--------------------------------------------------------------------------
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147 // End of hal_misc.c