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annotate packages/hal/arm/arch/current/src/hal_misc.c @ 3292:7f8e529b4d82 default tip

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Fix FREESCALE_EDMA_NBYTES_MLOFFYES_MLOFF() so it works with negative offsets.
author vae
date Wed, 29 Apr 2015 23:31:48 +0000
parents 74dbf4c3f2e1
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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, 2008 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
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44 // Date: 1999-02-20
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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_arm.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 #ifdef CYGPKG_CYGMON
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59 #include <pkgconf/cygmon.h>
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60 #endif
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61
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62 #include <cyg/infra/diag.h>
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63 #include <cyg/infra/cyg_type.h>
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64 #include <cyg/infra/cyg_trac.h> // tracing macros
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65 #include <cyg/infra/cyg_ass.h> // assertion macros
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66
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67 #include <cyg/hal/hal_arch.h> // HAL header
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68 #include <cyg/hal/hal_intr.h> // HAL header
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69
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70 /*------------------------------------------------------------------------*/
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71 /* First level C exception handler. */
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72
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73 externC void __handle_exception (void);
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74
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75 externC HAL_SavedRegisters *_hal_registers;
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76 #ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
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77 externC void* volatile __mem_fault_handler;
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78 #endif
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79
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80
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81 #ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
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82 /* Force exception handling into the GDB stubs. This is done by taking over
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83 the exception vectors while executing in the stubs. This allows for the
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84 debugged program to handle exceptions itself, except while the GDB
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85 processing is underway. The only vector that can't be handled this way
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86 is the illegal instruction vector which is used for breakpoint/single-step
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87 and must be maintained by the stubs at all times.
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88 Note: the interrupt vectors are _not_ preempted as the stubs probably can't
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89 handle them properly.
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90 */
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91
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92 #define ARM_VECTORS 8
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93 extern unsigned long vectors[]; // exception vectors as defined by the stubs
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94
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95 #if !defined(CYGPKG_CYGMON)
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96 static unsigned long *hardware_vectors = (unsigned long *)0x20;
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97 static unsigned long hold_vectors[ARM_VECTORS];
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98 static int exception_level;
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99
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100 static void
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101 __take_over_debug_traps(void)
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102 {
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103 hold_vectors[CYGNUM_HAL_VECTOR_ABORT_PREFETCH] = hardware_vectors[CYGNUM_HAL_VECTOR_ABORT_PREFETCH];
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104 hardware_vectors[CYGNUM_HAL_VECTOR_ABORT_PREFETCH] = vectors[CYGNUM_HAL_VECTOR_ABORT_PREFETCH];
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105 hold_vectors[CYGNUM_HAL_VECTOR_ABORT_DATA] = hardware_vectors[CYGNUM_HAL_VECTOR_ABORT_DATA];
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106 hardware_vectors[CYGNUM_HAL_VECTOR_ABORT_DATA] = vectors[CYGNUM_HAL_VECTOR_ABORT_DATA];
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107 }
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108
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109 static void
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110 __restore_debug_traps(void)
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111 {
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112 hardware_vectors[CYGNUM_HAL_VECTOR_ABORT_PREFETCH] = hold_vectors[CYGNUM_HAL_VECTOR_ABORT_PREFETCH];
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113 hardware_vectors[CYGNUM_HAL_VECTOR_ABORT_DATA] = hold_vectors[CYGNUM_HAL_VECTOR_ABORT_DATA];
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114 }
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115 #endif // !CYGPKG_CYGMON
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116 #endif
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117
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118 void
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119 exception_handler(HAL_SavedRegisters *regs)
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120 {
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121 // Special case handler for code which has chosen to take care
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122 // of data exceptions (i.e. code which expects them to happen)
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123 // This is common in discovery code, e.g. checking for a particular
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124 // device which may generate an exception when probing if the
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125 // device is not present
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126 #ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
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127 if (__mem_fault_handler &&
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128 regs->vector == CYGNUM_HAL_EXCEPTION_DATA_ACCESS) {
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129 regs->pc = (unsigned long)__mem_fault_handler;
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130 return; // Caught an exception inside stubs
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131 }
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132 #endif
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133
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134 #if defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS) && !defined(CYGPKG_CYGMON)
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135 if (++exception_level == 1) __take_over_debug_traps();
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136
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137 _hal_registers = regs;
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138 __handle_exception();
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139
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140 if (--exception_level == 0) __restore_debug_traps();
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141
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142 #elif defined(CYGPKG_KERNEL_EXCEPTIONS)
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143
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144 // We should decode the vector and pass a more appropriate
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145 // value as the second argument. For now we simply pass a
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146 // pointer to the saved registers. We should also divert
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147 // breakpoint and other debug vectors into the debug stubs.
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148
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149 cyg_hal_deliver_exception( regs->vector, (CYG_ADDRWORD)regs );
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150
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151 #else
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152
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153 CYG_FAIL("Exception!!!");
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154
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155 #endif
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156
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157 return;
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158 }
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159
152
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160 void hal_spurious_IRQ(HAL_SavedRegisters *regs) CYGBLD_ATTRIB_WEAK;
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161 void
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162 hal_spurious_IRQ(HAL_SavedRegisters *regs)
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163 {
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164 #if defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)
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165 exception_handler(regs);
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166 #else
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167 CYG_FAIL("Spurious interrupt!!");
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168 #endif
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169 }
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170
2
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171 /*------------------------------------------------------------------------*/
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172 /* C++ support - run initial constructors */
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173
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174 #ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG
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175 cyg_bool cyg_hal_stop_constructors;
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176 #endif
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177
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178 typedef void (*pfunc) (void);
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179
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180 // EABI uses different symbols, and constructors are in opposite order.
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181 #ifdef CYGBLD_HAL_ARM_EABI
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182 extern pfunc __init_array_start__[];
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183 extern pfunc __init_array_end__[];
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184 #define CONSTRUCTORS_START (__init_array_start__[0])
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185 #define CONSTRUCTORS_END (__init_array_end__)
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186 #define NEXT_CONSTRUCTOR(c) ((c)++)
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187 #else
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188 extern pfunc __CTOR_LIST__[];
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189 extern pfunc __CTOR_END__[];
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190 #define CONSTRUCTORS_START (__CTOR_END__[-1])
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191 #define CONSTRUCTORS_END (&__CTOR_LIST__[-1])
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192 #define NEXT_CONSTRUCTOR(c) ((c)--)
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193 #endif
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194
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195 void
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196 cyg_hal_invoke_constructors (void)
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197 {
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198 #ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG
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199 static pfunc *p = &CONSTRUCTORS_START;
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200
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201 cyg_hal_stop_constructors = 0;
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202 for (; p != CONSTRUCTORS_END; NEXT_CONSTRUCTOR(p)) {
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203 (*p)();
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204 if (cyg_hal_stop_constructors) {
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205 NEXT_CONSTRUCTOR(p);
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206 break;
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207 }
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208 }
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209 #else
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210 pfunc *p;
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211
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212 for (p = &CONSTRUCTORS_START; p != CONSTRUCTORS_END; NEXT_CONSTRUCTOR(p))
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213 (*p)();
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214 #endif
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215 }
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216
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217 /*------------------------------------------------------------------------*/
110
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218 /* Architecture default ISR */
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219
103
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220 externC cyg_uint32
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221 hal_arch_default_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data)
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222 {
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223 CYG_TRACE1(true, "Interrupt: %d", vector);
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224
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225 CYG_FAIL("Spurious Interrupt!!!");
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226 return 0;
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227 }
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228
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229 /*-------------------------------------------------------------------------*/
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230 /* Misc functions */
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231
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232 #ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
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233 /* This function will generate a breakpoint exception. It is used at the
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234 beginning of a program to sync up with a debugger and can be used
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235 otherwise as a quick means to stop program execution and "break" into
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236 the debugger. */
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237
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238 void
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239 breakpoint(void)
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240 {
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241 HAL_BREAKPOINT(_breakinst);
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242 }
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243
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244
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245 /* This function returns the opcode for a 'trap' instruction. */
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246
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247 unsigned long
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248 __break_opcode (void)
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249 {
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250 return HAL_BREAKINST;
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251 }
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252 #endif
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253
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254 int
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255 hal_lsbindex(int mask)
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256 {
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257 int i;
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258 for (i = 0; i < 32; i++) {
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259 if (mask & (1<<i)) return (i);
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260 }
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261 return (-1);
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262 }
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263
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264 int
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265 hal_msbindex(int mask)
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266 {
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267 int i;
194
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268 for (i = 31; i >= 0; i--) {
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269 if (mask & (1<<i)) return (i);
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270 }
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271 return (-1);
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272 }
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273
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274 #ifdef CYGHWR_HAL_ARM_DUMP_EXCEPTIONS
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275 void
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276 dump_frame(unsigned char *frame)
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277 {
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278 HAL_SavedRegisters *rp = (HAL_SavedRegisters *)frame;
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279 int i;
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280 diag_dump_buf(frame, 128);
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281 diag_printf("Registers:\n");
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282 for (i = 0; i <= 10; i++) {
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283 if ((i == 0) || (i == 6)) diag_printf("R%d: ", i);
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284 diag_printf("%08X ", rp->d[i]);
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285 if ((i == 5) || (i == 10)) diag_printf("\n");
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286 }
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287 diag_printf("FP: %08X, SP: %08X, LR: %08X, PC: %08X, PSR: %08X\n",
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288 rp->fp, rp->sp, rp->lr, rp->pc, rp->cpsr);
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289 }
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290 #endif
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291
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292 #if 0
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293 void
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294 show_frame_in(HAL_SavedRegisters *frame)
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295 {
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296 int old;
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297 HAL_DISABLE_INTERRUPTS(old);
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298 diag_printf("[IN] IRQ Frame:\n");
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299 dump_frame((unsigned char *)frame);
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300 HAL_RESTORE_INTERRUPTS(old);
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301 }
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302
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303 void
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304 show_frame_out(HAL_SavedRegisters *frame)
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305 {
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306 int old;
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307 HAL_DISABLE_INTERRUPTS(old);
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308 diag_printf("[OUT] IRQ Frame:\n");
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309 dump_frame((unsigned char *)frame);
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310 HAL_RESTORE_INTERRUPTS(old);
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311 }
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312 #endif
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313
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314 #ifdef CYGHWR_HAL_ARM_DUMP_EXCEPTIONS
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315 // Debug routines
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316 void cyg_hal_report_undefined_instruction(HAL_SavedRegisters *frame)
2
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317 {
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318 int old;
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319 HAL_DISABLE_INTERRUPTS(old);
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320 diag_printf("[UNDEFINED INSTRUCTION] Frame:\n");
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321 dump_frame((unsigned char *)frame);
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322 HAL_RESTORE_INTERRUPTS(old);
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323 }
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324
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325 void cyg_hal_report_software_interrupt(HAL_SavedRegisters *frame)
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326 {
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327 int old;
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328 HAL_DISABLE_INTERRUPTS(old);
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329 diag_printf("[SOFTWARE INTERRUPT] Frame:\n");
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330 dump_frame((unsigned char *)frame);
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331 HAL_RESTORE_INTERRUPTS(old);
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332 }
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333
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334 void cyg_hal_report_abort_prefetch(HAL_SavedRegisters *frame)
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335 {
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336 int old;
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337 HAL_DISABLE_INTERRUPTS(old);
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338 diag_printf("[ABORT PREFETCH] Frame:\n");
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339 dump_frame((unsigned char *)frame);
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340 HAL_RESTORE_INTERRUPTS(old);
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341 }
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342
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343 void cyg_hal_report_abort_data(HAL_SavedRegisters *frame)
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344 {
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345 int old;
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346 HAL_DISABLE_INTERRUPTS(old);
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347 diag_printf("[ABORT DATA] Frame:\n");
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348 dump_frame((unsigned char *)frame);
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349 HAL_RESTORE_INTERRUPTS(old);
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350 }
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351
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352 void cyg_hal_report_exception_handler_returned(HAL_SavedRegisters *frame)
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353 {
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354 int old;
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355 HAL_DISABLE_INTERRUPTS(old);
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356 diag_printf("Exception handler returned!\n");
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357 dump_frame((unsigned char *)frame);
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358 HAL_RESTORE_INTERRUPTS(old);
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359 }
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360 #endif
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361
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362 /*------------------------------------------------------------------------*/
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363 // EOF hal_misc.c