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annotate packages/hal/v85x/arch/current/src/hal_misc.c @ 210:d2c90368aeef

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Merge from eCos master repository on 2002-05-23-21:39:14-BST
author jlarmour
date Thu, 23 May 2002 22:59:51 +0000
parents e0c0827131d1
children e0a4e3b20d73
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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 //####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 Red Hat, 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 version.
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16 //
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17 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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18 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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20 // for more details.
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21 //
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22 // You should have received a copy of the GNU General Public License along
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23 // with eCos; if not, write to the Free Software Foundation, Inc.,
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24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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25 //
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26 // As a special exception, if other files instantiate templates or use macros
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27 // or inline functions from this file, or you compile this file and link it
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28 // with other works to produce a work based on this file, this file does not
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29 // by itself cause the resulting work to be covered by the GNU General Public
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30 // License. However the source code for this file must still be made available
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31 // in accordance with section (3) of the GNU General Public License.
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32 //
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33 // This exception does not invalidate any other reasons why a work based on
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34 // this file might be covered by the GNU General Public License.
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35 //
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36 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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37 // at http://sources.redhat.com/ecos/ecos-license/
208
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38 // -------------------------------------------
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39 //####ECOSGPLCOPYRIGHTEND####
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40 //==========================================================================
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41 //#####DESCRIPTIONBEGIN####
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42 //
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43 // Author(s): nickg, gthomas
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44 // Contributors: nickg, gthomas, jlarmour
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45 // Date: 2001-03-21
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46 // Purpose: HAL miscellaneous functions
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47 // Description: This file contains miscellaneous functions provided by the
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48 // HAL.
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49 //
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50 //####DESCRIPTIONEND####
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51 //
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52 //=========================================================================*/
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53
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54 #include <pkgconf/hal.h>
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55 #include <pkgconf/hal_v85x.h>
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56 #ifdef CYGPKG_KERNEL
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57 #include <pkgconf/kernel.h>
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58 #endif
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59
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60 #include <cyg/infra/cyg_type.h>
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61 #include <cyg/infra/cyg_trac.h> // tracing macros
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62 #include <cyg/infra/cyg_ass.h> // assertion macros
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63 #include <cyg/infra/diag.h>
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64
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65 #include <cyg/hal/hal_arch.h> // HAL header
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66 #include <cyg/hal/hal_intr.h> // HAL header
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67
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68 /*------------------------------------------------------------------------*/
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69 /* First level C exception handler. */
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70
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71 externC void __handle_exception (void);
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72
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73 externC HAL_SavedRegisters *_hal_registers;
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74 externC void* volatile __mem_fault_handler;
96
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75
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76 void
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77 exception_handler(HAL_SavedRegisters *regs)
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78 {
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79 #if defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)
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80 // diag_printf("Exception! Frame: %x\n", regs);
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81 // show_regs(regs);
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82 static int gdb_active;
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83 if (gdb_active == 0) {
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84 gdb_active = 1;
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85 _hal_registers = regs;
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86 __handle_exception();
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87 gdb_active = 0;
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88 }
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89
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90 #elif defined(CYGPKG_KERNEL_EXCEPTIONS)
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91
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92 // We should decode the vector and pass a more appropriate
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93 // value as the second argument. For now we simply pass a
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94 // pointer to the saved registers. We should also divert
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95 // breakpoint and other debug vectors into the debug stubs.
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96
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97 cyg_hal_deliver_exception( regs->vector, (CYG_ADDRWORD)regs );
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98
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99 #else
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100
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101 CYG_FAIL("Exception!!!");
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102
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103 #endif
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104
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105 return;
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106 }
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107
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108 /*------------------------------------------------------------------------*/
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109 /* C++ support - run initial constructors */
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110
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111 #ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG
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112 cyg_bool cyg_hal_stop_constructors;
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113 #endif
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114
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115 typedef void (*pfunc) (void);
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116 extern pfunc __CTOR_LIST__[];
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117 extern pfunc __CTOR_END__[];
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118
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119 void
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120 cyg_hal_invoke_constructors (void)
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121 {
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122
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123 #ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG
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124 static pfunc *p = &__CTOR_END__[-1];
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125
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126 cyg_hal_stop_constructors = 0;
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127 for (; p >= __CTOR_LIST__; p--) {
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128 (*p) ();
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129 if (cyg_hal_stop_constructors) {
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130 p--;
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131 break;
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132 }
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133 }
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134 #else
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135 pfunc *p;
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136
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137 for (p = &__CTOR_END__[-1]; p >= __CTOR_LIST__; p--) {
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138 (*p) ();
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139 }
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140 #endif
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141 }
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142
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143 /*------------------------------------------------------------------------*/
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144 /* default ISR */
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145
101
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146 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT
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147 externC cyg_uint32
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148 hal_arch_default_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data)
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149 {
156
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150 CYG_TRACE1(true, "Interrupt: %d", vector);
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151
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152 diag_printf("Spurious Interrupt!!! - vector: %d, data: %x\n", vector,
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153 data);
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154 CYG_FAIL("Spurious Interrupt!!!");
101
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155 return 0;
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156 }
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157 #else
96
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158 externC cyg_uint32
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159 hal_default_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data)
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160 {
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161 CYG_TRACE1(true, "Interrupt: %d", vector);
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162
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163 #ifndef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
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164 #ifdef CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT
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165 #ifdef CYGDBG_HAL_CTRLC_ISR
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166 // then see if it is an incoming character interrupt and break
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167 // into the stub ROM if the char is a ^C.
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168 if ( CYGDBG_HAL_CTRLC_ISR( vector, data ) )
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169 return 1; // interrupt handled
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170 #endif
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171 #endif
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172 #endif
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173
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174 diag_printf("Spurious Interrupt!!! - vector: %d, data: %x\n", vector,
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175 data);
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176 CYG_FAIL("Spurious Interrupt!!!");
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177 return 0;
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178 }
101
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179 #endif
96
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180
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181 /*------------------------------------------------------------------------*/
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182 /* Idle thread action */
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183
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184 void
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185 hal_idle_thread_action( cyg_uint32 count )
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186 {
156
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187 // power saving instruction
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188 asm("halt");
96
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189 }
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190
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191 /*-------------------------------------------------------------------------*/
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192 /* Misc functions */
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193
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194 cyg_uint32
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195 hal_lsbit_index(cyg_uint32 mask)
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196 {
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197 int i;
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198 for (i = 0; i < 32; i++) {
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199 if (mask & (1<<i)) return ((cyg_uint32)i);
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200 }
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201 return ((cyg_uint32)-1);
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202 }
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203
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204 cyg_uint32
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205 hal_msbit_index(cyg_uint32 mask)
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206 {
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207 int i;
197
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208 for (i = 31; i >= 0; i--) {
96
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209 if (mask & (1<<i)) return ((cyg_uint32)i);
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210 }
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211 return ((cyg_uint32)-1);
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212 }
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213
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214 void
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215 show_regs(HAL_SavedRegisters *regs)
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216 {
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217 int i;
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218 diag_printf("Regs\n");
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219 for (i = 0; i < 32; i++) {
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220 if ((i % 8) == 0) {
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221 diag_printf("R%2d: ", i);
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222 }
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223 diag_printf("0x%08x ", regs->d[i]);
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224 if ((i % 8) == 7) {
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225 diag_printf("\n");
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226 }
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227 }
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228 diag_printf("PC = %x, PSW = %x\n", regs->pc, regs->psw);
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229 }
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230
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231 /*------------------------------------------------------------------------*/
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232 // EOF hal_misc.c