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annotate packages/hal/v85x/arch/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 eb9fd8c04db3
children 51b34619b677
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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 //####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, gthomas
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35 // Contributors: nickg, gthomas, jlarmour
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36 // Date: 2001-03-21
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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 #include <pkgconf/hal_v85x.h>
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47 #ifdef CYGPKG_KERNEL
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48 #include <pkgconf/kernel.h>
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49 #endif
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50
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51 #include <cyg/infra/cyg_type.h>
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52 #include <cyg/infra/cyg_trac.h> // tracing macros
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53 #include <cyg/infra/cyg_ass.h> // assertion macros
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54 #include <cyg/infra/diag.h>
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55
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56 #include <cyg/hal/hal_arch.h> // HAL header
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57 #include <cyg/hal/hal_intr.h> // HAL header
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58
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59 /*------------------------------------------------------------------------*/
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60 /* First level C exception handler. */
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61
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62 externC void __handle_exception (void);
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63
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64 externC HAL_SavedRegisters *_hal_registers;
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65 externC void* volatile __mem_fault_handler;
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66
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67 void
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68 exception_handler(HAL_SavedRegisters *regs)
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69 {
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70 #if defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)
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71 // diag_printf("Exception! Frame: %x\n", regs);
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72 // show_regs(regs);
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73 static int gdb_active;
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74 if (gdb_active == 0) {
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75 gdb_active = 1;
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76 _hal_registers = regs;
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77 __handle_exception();
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78 gdb_active = 0;
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79 }
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80
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81 #elif defined(CYGPKG_KERNEL_EXCEPTIONS)
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82
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83 // We should decode the vector and pass a more appropriate
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84 // value as the second argument. For now we simply pass a
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85 // pointer to the saved registers. We should also divert
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86 // breakpoint and other debug vectors into the debug stubs.
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87
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88 cyg_hal_deliver_exception( regs->vector, (CYG_ADDRWORD)regs );
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89
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90 #else
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91
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92 CYG_FAIL("Exception!!!");
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93
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94 #endif
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95
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96 return;
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97 }
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98
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99 /*------------------------------------------------------------------------*/
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100 /* C++ support - run initial constructors */
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101
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102 #ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG
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103 cyg_bool cyg_hal_stop_constructors;
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104 #endif
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105
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106 typedef void (*pfunc) (void);
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107 extern pfunc __CTOR_LIST__[];
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108 extern pfunc __CTOR_END__[];
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109
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110 void
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111 cyg_hal_invoke_constructors (void)
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112 {
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113
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114 #ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG
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115 static pfunc *p = &__CTOR_END__[-1];
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116
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117 cyg_hal_stop_constructors = 0;
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118 for (; p >= __CTOR_LIST__; p--) {
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119 (*p) ();
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120 if (cyg_hal_stop_constructors) {
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121 p--;
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122 break;
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123 }
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124 }
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125 #else
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126 pfunc *p;
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127
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128 for (p = &__CTOR_END__[-1]; p >= __CTOR_LIST__; p--) {
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129 (*p) ();
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130 }
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131 #endif
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132 }
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133
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134 /*------------------------------------------------------------------------*/
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135 /* default ISR */
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136
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137 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT
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138 externC cyg_uint32
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139 hal_arch_default_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data)
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140 {
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141 CYG_TRACE1(true, "Interrupt: %d", vector);
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142
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143 diag_printf("Spurious Interrupt!!! - vector: %d, data: %x\n", vector,
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144 data);
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145 CYG_FAIL("Spurious Interrupt!!!");
101
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146 return 0;
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147 }
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148 #else
96
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149 externC cyg_uint32
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150 hal_default_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data)
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151 {
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152 CYG_TRACE1(true, "Interrupt: %d", vector);
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153
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154 #ifndef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
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155 #ifdef CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT
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156 #ifdef CYGDBG_HAL_CTRLC_ISR
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157 // then see if it is an incoming character interrupt and break
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158 // into the stub ROM if the char is a ^C.
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159 if ( CYGDBG_HAL_CTRLC_ISR( vector, data ) )
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160 return 1; // interrupt handled
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161 #endif
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162 #endif
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163 #endif
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164
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165 diag_printf("Spurious Interrupt!!! - vector: %d, data: %x\n", vector,
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166 data);
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167 CYG_FAIL("Spurious Interrupt!!!");
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168 return 0;
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169 }
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170 #endif
96
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171
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172 /*------------------------------------------------------------------------*/
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173 /* Idle thread action */
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174
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175 void
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176 hal_idle_thread_action( cyg_uint32 count )
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177 {
156
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178 // power saving instruction
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179 asm("halt");
96
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180 }
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181
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182 /*-------------------------------------------------------------------------*/
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183 /* Misc functions */
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184
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185 cyg_uint32
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186 hal_lsbit_index(cyg_uint32 mask)
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187 {
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188 int i;
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189 for (i = 0; i < 32; i++) {
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190 if (mask & (1<<i)) return ((cyg_uint32)i);
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191 }
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192 return ((cyg_uint32)-1);
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193 }
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194
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195 cyg_uint32
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196 hal_msbit_index(cyg_uint32 mask)
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197 {
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198 int i;
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199 for (i = 32; i >= 0; i++) {
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200 if (mask & (1<<i)) return ((cyg_uint32)i);
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201 }
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202 return ((cyg_uint32)-1);
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203 }
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204
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205 void
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206 show_regs(HAL_SavedRegisters *regs)
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207 {
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208 int i;
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209 diag_printf("Regs\n");
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210 for (i = 0; i < 32; i++) {
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211 if ((i % 8) == 0) {
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212 diag_printf("R%2d: ", i);
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213 }
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214 diag_printf("0x%08x ", regs->d[i]);
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215 if ((i % 8) == 7) {
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216 diag_printf("\n");
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217 }
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218 }
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219 diag_printf("PC = %x, PSW = %x\n", regs->pc, regs->psw);
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220 }
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221
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222 /*------------------------------------------------------------------------*/
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223 // EOF hal_misc.c