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annotate packages/hal/common/current/src/hal_misc.c @ 130:eb9fd8c04db3 ecos-sw-2000-10-23

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Merge from eCos master repository on 2000-10-23-17:01:37-BST
author jlarmour
date Mon, 23 Oct 2000 17:10:57 +0000
parents 6ed91473a1cd
children 289bf90c6a9b
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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
115
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71 #if defined(CYGPKG_CYGMON)
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72 unsigned long cygmon_memsize = 0;
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73 #endif
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74
101
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75 //--------------------------------------------------------------------------
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76 // Functions to support the detection and execution of a user provoked
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77 // program break. These are usually called from interrupt routines.
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78
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79 cyg_bool
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80 cyg_hal_is_break(char *buf, int size)
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81 {
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82 while( size )
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83 if( buf[--size] == 0x03 ) return true;
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84
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85 return false;
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86 }
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87
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88 void
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89 cyg_hal_user_break( CYG_ADDRWORD *regs )
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90 {
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91 #if defined(CYGSEM_HAL_USE_ROM_MONITOR_GDB_stubs) \
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92 || defined(CYGSEM_HAL_USE_ROM_MONITOR_CygMon) \
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93 || defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)
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94
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95 CYG_ADDRWORD __ra;
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96 CYG_WORD32 __pc;
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97 HAL_SavedRegisters *sreg = (HAL_SavedRegisters *)regs;
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98
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99 CYGARC_HAL_GET_RETURN_ADDRESS(__ra);
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100
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101 if( regs == NULL ) __pc = __ra;
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102 else __pc = sreg->pc;
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103
107
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104 CYGACC_CALL_IF_INSTALL_BPT_FN((void *)__pc);
101
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105
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106 CYGARC_HAL_GET_RETURN_ADDRESS_BACKUP();
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107
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108 #else
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109
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110 HAL_BREAKPOINT(breakinst);
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111
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112 #endif
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113 }
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114
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115
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116 //--------------------------------------------------------------------------
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117 // The system default interrupt ISR. It calls the architecture default
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118 // ISR as well if necessary.
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119 externC cyg_uint32 hal_arch_default_isr(CYG_ADDRWORD vector,
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120 CYG_ADDRWORD data);
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121
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122 cyg_uint32
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123 hal_default_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data)
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124 {
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125 cyg_uint32 result;
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126
105
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127 #if (defined(CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT) \
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128 || defined(CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT)) && \
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129 (defined(CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT) || \
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130 defined(CYGHWR_HAL_GDB_PORT_VECTOR) && \
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131 defined(HAL_CTRLC_ISR))
101
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132
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133 #ifndef CYGIMP_HAL_COMMON_INTERRUPTS_CHAIN
105
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134 #if CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT
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135 int gdb_vector = -1;
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136 // This check only to avoid crash on older stubs in case of unhandled
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137 // interrupts. It is a bit messy, but required in a transition period.
112
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138 if (CYGNUM_CALL_IF_TABLE_VERSION+1 == CYGACC_CALL_IF_VERSION()) {
105
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139 hal_virtual_comm_table_t* comm = CYGACC_CALL_IF_DEBUG_PROCS();
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140 gdb_vector = CYGACC_COMM_IF_CONTROL(*comm, __COMMCTL_DBG_ISR_VECTOR);
105
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141 }
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142 if( vector == gdb_vector )
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143 #else
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144 // Old code using hardwired channels. This should go away eventually.
101
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145 if( vector == CYGHWR_HAL_GDB_PORT_VECTOR )
105
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146 #endif
101
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147 #endif
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148 {
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149 result = HAL_CTRLC_ISR( vector, data );
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150 if( 0 != result ) return result;
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151 }
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152 #endif
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153
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154 result = hal_arch_default_isr (vector, data);
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155 if( 0 != result) return result;
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156
105
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157 CYG_TRACE2(true, "Interrupt: %d, Data: 0x%08x", vector, data);
101
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158 CYG_FAIL("Spurious Interrupt!!!");
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159 return 0;
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160 }
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161
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162
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163 //--------------------------------------------------------------------------
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164 // End of hal_misc.c