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annotate packages/hal/common/current/src/hal_misc.c @ 156:b939e9cada46

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Merge from eCos master repository on 2001-03-29-21:44:39-BST
author jlarmour
date Fri, 06 Apr 2001 17:20:13 +0000
parents 25e238959bae
children 920b9b754b53
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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, 2001 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 // Macro for finding PC in saved regs
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73 #ifndef CYGARC_HAL_GET_PC_REG
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74 #define CYGARC_HAL_GET_PC_REG(_regs_,_val_) ((_val_) = (_regs_)->pc)
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75 #endif
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76
115
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77 #if defined(CYGPKG_CYGMON)
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78 unsigned long cygmon_memsize = 0;
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79 #endif
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80
101
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81 //--------------------------------------------------------------------------
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82 // Functions to support the detection and execution of a user provoked
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83 // program break. These are usually called from interrupt routines.
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84
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85 cyg_bool
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86 cyg_hal_is_break(char *buf, int size)
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87 {
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88 while( size )
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89 if( buf[--size] == 0x03 ) return true;
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90
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91 return false;
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92 }
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93
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94 void
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95 cyg_hal_user_break( CYG_ADDRWORD *regs )
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96 {
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97 #if defined(CYGSEM_HAL_USE_ROM_MONITOR_GDB_stubs) \
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98 || defined(CYGSEM_HAL_USE_ROM_MONITOR_CygMon) \
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99 || defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)
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100
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101 CYG_ADDRWORD __ra;
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102 CYG_WORD32 __pc;
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103 HAL_SavedRegisters *sreg = (HAL_SavedRegisters *)regs;
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104
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105 CYGARC_HAL_GET_RETURN_ADDRESS(__ra);
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106
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107 if( regs == NULL ) __pc = __ra;
156
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108 else CYGARC_HAL_GET_PC_REG(sreg, __pc);
101
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109
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110 CYGACC_CALL_IF_INSTALL_BPT_FN((void *)__pc);
101
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111
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112 CYGARC_HAL_GET_RETURN_ADDRESS_BACKUP();
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113
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114 #else
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115
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116 HAL_BREAKPOINT(breakinst);
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117
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118 #endif
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119 }
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120
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121
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122 //--------------------------------------------------------------------------
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123 // The system default interrupt ISR. It calls the architecture default
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124 // ISR as well if necessary.
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125 externC cyg_uint32 hal_arch_default_isr(CYG_ADDRWORD vector,
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126 CYG_ADDRWORD data);
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127
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128 cyg_uint32
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129 hal_default_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data)
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130 {
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131 cyg_uint32 result;
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132
105
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133 #if (defined(CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT) \
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134 || defined(CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT)) && \
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135 (defined(CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT) || \
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136 defined(CYGHWR_HAL_GDB_PORT_VECTOR) && \
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137 defined(HAL_CTRLC_ISR))
101
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138
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139 #ifndef CYGIMP_HAL_COMMON_INTERRUPTS_CHAIN
105
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140 #if CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT
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141 int gdb_vector = -1;
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142 // This check only to avoid crash on older stubs in case of unhandled
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143 // interrupts. It is a bit messy, but required in a transition period.
138
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144 #ifndef CYGSEM_HAL_ROM_MONITOR
151
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145 if (CYGNUM_CALL_IF_TABLE_VERSION_CALL_HACK ==
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146 (CYGACC_CALL_IF_VERSION() & CYGNUM_CALL_IF_TABLE_VERSION_CALL_MASK))
138
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147 #endif
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148 {
151
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149 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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150 if (__chan)
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151 gdb_vector = CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_DBG_ISR_VECTOR);
105
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152 }
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153 if( vector == gdb_vector )
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154 #else
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155 // Old code using hardwired channels. This should go away eventually.
101
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156 if( vector == CYGHWR_HAL_GDB_PORT_VECTOR )
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157 #endif
151
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158 #endif
101
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159 {
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160 result = HAL_CTRLC_ISR( vector, data );
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161 if( 0 != result ) return result;
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162 }
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163 #endif
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164
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165 result = hal_arch_default_isr (vector, data);
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166 if( 0 != result) return result;
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167
105
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168 CYG_TRACE2(true, "Interrupt: %d, Data: 0x%08x", vector, data);
101
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169 CYG_FAIL("Spurious Interrupt!!!");
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170 return 0;
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171 }
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172
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173
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174 //--------------------------------------------------------------------------
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175 // End of hal_misc.c