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annotate packages/hal/common/current/src/hal_misc.c @ 2729:74dbf4c3f2e1 after-copyright-change-20090129

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Update all copyright banners to reflect FSF ownership; fix and improve licence text.
author jlarmour
date Thu, 29 Jan 2009 17:47:46 +0000
parents 22d7a1b27981
children
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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 // ####ECOSGPLCOPYRIGHTBEGIN####
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9 // -------------------------------------------
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10 // This file is part of eCos, the Embedded Configurable Operating System.
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11 // Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
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12 //
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13 // eCos is free software; you can redistribute it and/or modify it under
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14 // the terms of the GNU General Public License as published by the Free
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15 // Software Foundation; either version 2 or (at your option) any later
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16 // version.
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17 //
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18 // eCos is distributed in the hope that it will be useful, but WITHOUT
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19 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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20 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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21 // for more details.
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22 //
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23 // You should have received a copy of the GNU General Public License
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24 // along with eCos; if not, write to the Free Software Foundation, Inc.,
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25 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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26 //
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27 // As a special exception, if other files instantiate templates or use
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28 // macros or inline functions from this file, or you compile this file
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29 // and link it with other works to produce a work based on this file,
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30 // this file does not by itself cause the resulting work to be covered by
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31 // the GNU General Public License. However the source code for this file
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32 // must still be made available in accordance with section (3) of the GNU
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33 // General Public License v2.
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34 //
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35 // This exception does not invalidate any other reasons why a work based
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36 // on this file might be covered by the GNU General Public License.
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37 // -------------------------------------------
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38 // ####ECOSGPLCOPYRIGHTEND####
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39 //==========================================================================
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40 //#####DESCRIPTIONBEGIN####
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41 //
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42 // Author(s): nickg
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43 // Contributors: nickg, jskov
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44 // Date: 2000-06-08
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45 // Purpose: HAL miscellaneous functions
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46 // Description: This file contains miscellaneous functions provided by the
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47 // HAL.
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48 //
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49 //####DESCRIPTIONEND####
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50 //
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51 //========================================================================*/
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52
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53 #include <pkgconf/hal.h>
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54
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55 #include <cyg/hal/hal_arch.h>
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56 #include <cyg/hal/hal_if.h>
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57
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58 #include <cyg/hal/hal_intr.h>
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59 #include <cyg/hal/hal_misc.h> // our header
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60
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61 #include <cyg/infra/cyg_type.h> // Base types
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62 #include <cyg/infra/cyg_trac.h> // tracing macros
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63 #include <cyg/infra/cyg_ass.h> // assertion macros
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64
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65 //--------------------------------------------------------------------------
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66
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67 //--------------------------------------------------------------------------
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68 // Macro for finding return address.
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69 #ifndef CYGARC_HAL_GET_RETURN_ADDRESS
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70
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71 #define CYGARC_HAL_GET_RETURN_ADDRESS(_x_, _dummy_) \
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72 CYG_MACRO_START \
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73 (_dummy_) = 1; \
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74 (_x_) = (CYG_ADDRWORD)&&__backup_return_address; \
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75 CYG_MACRO_END
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76
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77 #define CYGARC_HAL_GET_RETURN_ADDRESS_BACKUP(_dummy_) \
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78 CYG_MACRO_START \
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79 __backup_return_address: \
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80 if ((_dummy_)-- > 0) \
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81 goto __backup_return_address; \
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82 CYG_MACRO_END
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83 #endif
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84
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85 //--------------------------------------------------------------------------
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86 // Macro for finding PC in saved regs
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87 #ifndef CYGARC_HAL_GET_PC_REG
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88 #define CYGARC_HAL_GET_PC_REG(_regs_,_val_) ((_val_) = (_regs_)->pc)
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89 #endif
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90
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91 //--------------------------------------------------------------------------
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92 // Macro for matching interrupt vector to GDB comm channel.
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93 #ifndef CYGHWR_HAL_GDB_PORT_VECTORS_MATCH
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94 #define CYGHWR_HAL_GDB_PORT_VECTORS_MATCH(_v_,_gv_) ((_v_)==(_gv_))
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95 #endif
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96
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97 #if defined(CYGPKG_CYGMON)
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98 unsigned long cygmon_memsize = 0;
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99 #endif
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100
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101 //--------------------------------------------------------------------------
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102 // Functions to support the detection and execution of a user provoked
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103 // program break. These are usually called from interrupt routines.
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104
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105 cyg_bool
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106 cyg_hal_is_break(char *buf, int size)
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107 {
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108 while( size )
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109 if( buf[--size] == 0x03 ) return true;
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110
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111 return false;
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112 }
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113
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114 // Keep this variable global, to prevent the compiler removing it (and
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115 // the goto-reference) due to being local to the function where it is
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116 // used. Yes, it's ugly.
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117 int _cyg_hal_compiler_dummy;
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118
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119 void
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120 cyg_hal_user_break( CYG_ADDRWORD *regs )
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121 {
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122 #if defined(CYGSEM_HAL_USE_ROM_MONITOR_GDB_stubs) \
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123 || defined(CYGSEM_HAL_USE_ROM_MONITOR_CygMon) \
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124 || defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)
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125
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126 CYG_ADDRWORD __ra;
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127 CYG_WORD32 __pc;
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128 HAL_SavedRegisters *sreg = (HAL_SavedRegisters *)regs;
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129
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130 CYGARC_HAL_GET_RETURN_ADDRESS(__ra, _cyg_hal_compiler_dummy);
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131
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132 if( regs == NULL ) __pc = __ra;
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133 else CYGARC_HAL_GET_PC_REG(sreg, __pc);
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135 CYGACC_CALL_IF_INSTALL_BPT_FN((void *)__pc);
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137 CYGARC_HAL_GET_RETURN_ADDRESS_BACKUP(_cyg_hal_compiler_dummy);
101
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138
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139 #else
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140
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141 HAL_BREAKPOINT(breakinst);
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142
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143 #endif
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144 }
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145
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146
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147 //--------------------------------------------------------------------------
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148 // The system default interrupt ISR. It calls the architecture default
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149 // ISR as well if necessary.
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150 externC cyg_uint32 hal_arch_default_isr(CYG_ADDRWORD vector,
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151 CYG_ADDRWORD data);
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152
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153 cyg_uint32
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154 hal_default_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data)
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155 {
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156 cyg_uint32 result;
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157
105
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158 #if (defined(CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT) \
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159 || defined(CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT)) && \
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160 (defined(CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT) || \
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161 defined(CYGHWR_HAL_GDB_PORT_VECTOR) && \
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162 defined(HAL_CTRLC_ISR))
101
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163
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164 #ifndef CYGIMP_HAL_COMMON_INTERRUPTS_CHAIN
105
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165 #if CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT
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166 int gdb_vector = -1;
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167 // This check only to avoid crash on older stubs in case of unhandled
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168 // interrupts. It is a bit messy, but required in a transition period.
138
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169 #ifndef CYGSEM_HAL_ROM_MONITOR
151
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170 if (CYGNUM_CALL_IF_TABLE_VERSION_CALL_HACK ==
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171 (CYGACC_CALL_IF_VERSION() & CYGNUM_CALL_IF_TABLE_VERSION_CALL_MASK))
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172 #endif
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173 {
151
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174 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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175 if (__chan)
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176 gdb_vector = CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_DBG_ISR_VECTOR);
105
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177 }
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178 if( CYGHWR_HAL_GDB_PORT_VECTORS_MATCH(vector, gdb_vector) )
105
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179 #else
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180 // Old code using hardwired channels. This should go away eventually.
101
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181 if( vector == CYGHWR_HAL_GDB_PORT_VECTOR )
105
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182 #endif
151
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183 #endif
101
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184 {
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185 result = HAL_CTRLC_ISR( vector, data );
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186 if( 0 != result ) return result;
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187 }
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188 #endif
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189
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190 result = hal_arch_default_isr (vector, data);
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191 if( 0 != result) return result;
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192
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193 CYG_TRACE2(true, "Interrupt: %d, Data: 0x%08x", vector, data);
101
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194 CYG_FAIL("Spurious Interrupt!!!");
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195 return 0;
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196 }
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197
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198
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199 //--------------------------------------------------------------------------
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200 // End of hal_misc.c