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annotate packages/hal/v85x/arch/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 e0a4e3b20d73
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 // 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 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, gthomas
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43 // Contributors: nickg, gthomas, jlarmour
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44 // Date: 2001-03-21
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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 #include <pkgconf/hal_v85x.h>
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55 #ifdef CYGPKG_KERNEL
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56 #include <pkgconf/kernel.h>
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57 #endif
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58
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59 #include <cyg/infra/cyg_type.h>
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60 #include <cyg/infra/cyg_trac.h> // tracing macros
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61 #include <cyg/infra/cyg_ass.h> // assertion macros
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62 #include <cyg/infra/diag.h>
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63
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64 #include <cyg/hal/hal_arch.h> // HAL header
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65 #include <cyg/hal/hal_intr.h> // HAL header
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66
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67 /*------------------------------------------------------------------------*/
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68 /* First level C exception handler. */
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69
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70 externC void __handle_exception (void);
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71
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72 externC HAL_SavedRegisters *_hal_registers;
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73
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74 void
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75 exception_handler(HAL_SavedRegisters *regs)
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76 {
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77 #if defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)
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78 // diag_printf("Exception! Frame: %x\n", regs);
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79 // show_regs(regs);
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80 static int gdb_active;
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81 if (gdb_active == 0) {
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82 gdb_active = 1;
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83 _hal_registers = regs;
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84 __handle_exception();
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85 gdb_active = 0;
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86 }
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87
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88 #elif defined(CYGPKG_KERNEL_EXCEPTIONS)
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89
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90 // We should decode the vector and pass a more appropriate
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91 // value as the second argument. For now we simply pass a
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92 // pointer to the saved registers. We should also divert
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93 // breakpoint and other debug vectors into the debug stubs.
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94
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95 cyg_hal_deliver_exception( regs->vector, (CYG_ADDRWORD)regs );
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96
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97 #else
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98
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99 CYG_FAIL("Exception!!!");
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100
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101 #endif
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102
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103 return;
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104 }
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105
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106 /*------------------------------------------------------------------------*/
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107 /* C++ support - run initial constructors */
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108
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109 #ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG
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110 cyg_bool cyg_hal_stop_constructors;
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111 #endif
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112
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113 typedef void (*pfunc) (void);
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114 extern pfunc __CTOR_LIST__[];
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115 extern pfunc __CTOR_END__[];
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116
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117 void
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118 cyg_hal_invoke_constructors (void)
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119 {
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120
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121 #ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG
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122 static pfunc *p = &__CTOR_END__[-1];
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123
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124 cyg_hal_stop_constructors = 0;
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125 for (; p >= __CTOR_LIST__; p--) {
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126 (*p) ();
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127 if (cyg_hal_stop_constructors) {
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128 p--;
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129 break;
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130 }
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131 }
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132 #else
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133 pfunc *p;
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134
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135 for (p = &__CTOR_END__[-1]; p >= __CTOR_LIST__; p--) {
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136 (*p) ();
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137 }
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138 #endif
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139 }
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140
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141 /*------------------------------------------------------------------------*/
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142 /* default ISR */
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143
101
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144 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT
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145 externC cyg_uint32
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146 hal_arch_default_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data)
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147 {
156
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148 CYG_TRACE1(true, "Interrupt: %d", vector);
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149
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150 diag_printf("Spurious Interrupt!!! - vector: %d, data: %x\n", vector,
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151 data);
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152 CYG_FAIL("Spurious Interrupt!!!");
101
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153 return 0;
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154 }
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155 #else
96
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156 externC cyg_uint32
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157 hal_default_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data)
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158 {
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159 CYG_TRACE1(true, "Interrupt: %d", vector);
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160
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161 #ifndef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
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162 #ifdef CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT
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163 #ifdef CYGDBG_HAL_CTRLC_ISR
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164 // then see if it is an incoming character interrupt and break
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165 // into the stub ROM if the char is a ^C.
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166 if ( CYGDBG_HAL_CTRLC_ISR( vector, data ) )
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167 return 1; // interrupt handled
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168 #endif
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169 #endif
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170 #endif
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171
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172 diag_printf("Spurious Interrupt!!! - vector: %d, data: %x\n", vector,
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173 data);
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174 CYG_FAIL("Spurious Interrupt!!!");
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175 return 0;
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176 }
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177 #endif
96
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178
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179 /*------------------------------------------------------------------------*/
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180 /* Idle thread action */
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181
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182 void
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183 hal_idle_thread_action( cyg_uint32 count )
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184 {
156
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185 // power saving instruction
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186 asm("halt");
96
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187 }
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188
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189 /*-------------------------------------------------------------------------*/
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190 /* Misc functions */
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191
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192 cyg_uint32
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193 hal_lsbit_index(cyg_uint32 mask)
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194 {
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195 int i;
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196 for (i = 0; i < 32; i++) {
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197 if (mask & (1<<i)) return ((cyg_uint32)i);
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198 }
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199 return ((cyg_uint32)-1);
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200 }
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201
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202 cyg_uint32
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203 hal_msbit_index(cyg_uint32 mask)
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204 {
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205 int i;
197
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206 for (i = 31; i >= 0; i--) {
96
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207 if (mask & (1<<i)) return ((cyg_uint32)i);
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208 }
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209 return ((cyg_uint32)-1);
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210 }
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211
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212 void
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213 show_regs(HAL_SavedRegisters *regs)
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214 {
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215 int i;
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216 diag_printf("Regs\n");
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217 for (i = 0; i < 32; i++) {
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218 if ((i % 8) == 0) {
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219 diag_printf("R%2d: ", i);
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220 }
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221 diag_printf("0x%08x ", regs->d[i]);
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222 if ((i % 8) == 7) {
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223 diag_printf("\n");
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224 }
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225 }
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226 diag_printf("PC = %x, PSW = %x\n", regs->pc, regs->psw);
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227 }
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228
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229 /*------------------------------------------------------------------------*/
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230 // EOF hal_misc.c