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annotate packages/hal/common/current/src/hal_stub.c @ 154:e2d866e32dac

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Merge from eCos master repository on 2001-02-26-23:18:05-GMT
author jlarmour
date Tue, 27 Feb 2001 01:21:45 +0000
parents 25e238959bae
children b939e9cada46
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1 //=============================================================================
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2 //
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3 // hal_stub.c
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4 //
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5 // Helper functions for stub, specific to eCos HAL
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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): jskov (based on powerpc/cogent hal_stub.c)
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35 // Contributors:jskov, dmoseley
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36 // Date: 1999-02-12
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37 // Purpose: Helper functions for stub, specific to eCos HAL
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38 // Description: Parts of the GDB stub requirements are provided by
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39 // the eCos HAL, rather than target and/or board specific
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40 // code.
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41 //
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42 //####DESCRIPTIONEND####
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43 //
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44 //=============================================================================
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45
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46 #include <pkgconf/hal.h>
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47 #ifdef CYGPKG_CYGMON
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48 #include <pkgconf/cygmon.h>
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49 #endif
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51 #ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
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52
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53 #include <cyg/hal/hal_stub.h> // Our header
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54
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55 #include <cyg/hal/hal_arch.h> // HAL_BREAKINST
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56 #include <cyg/hal/hal_cache.h> // HAL_xCACHE_x
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57 #include <cyg/hal/hal_intr.h> // interrupt disable/restore
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59 #include <cyg/hal/hal_if.h> // ROM calling interface
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60 #include <cyg/hal/hal_misc.h> // Helper functions
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61
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62 #ifdef CYGDBG_HAL_DEBUG_GDB_THREAD_SUPPORT
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63 #include <cyg/hal/dbg-threads-api.h> // dbg_currthread_id
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64 #endif
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65
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66 #ifdef USE_LONG_NAMES_FOR_ENUM_REGNAMES
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67 #ifndef PC
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68 #define PC REG_PC
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69 #endif
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70 #ifndef SP
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71 #define SP REG_SP
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72 #endif
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73 #endif
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74
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75 //-----------------------------------------------------------------------------
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76 // Extra eCos data.
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77
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78 // Saved registers.
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79 HAL_SavedRegisters *_hal_registers;
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80 target_register_t registers[NUMREGS];
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81 target_register_t alt_registers[NUMREGS] ; // Thread or saved process state
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82 target_register_t * _registers = registers; // Pointer to current set of registers
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83 target_register_t orig_registers[NUMREGS]; // Registers to get back to original state
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84
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85 #if defined(HAL_STUB_HW_WATCHPOINT) || defined(HAL_STUB_HW_BREAKPOINT)
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86 static int _hw_stop_reason; // Reason we were stopped by hw.
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87
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88 // strings indexed by hw stop reasons defined in hal_stub.h
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89 static const char * const _hw_stop_str[] = {
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90 "",
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91 "hbreak",
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92 "watch",
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93 "rwatch",
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94 "awatch"
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95 };
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96
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97 static void *_watch_data_addr; // The data address if stopped by watchpoint
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98 #endif
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99
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100 // Register validity checking
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101 #ifdef CYGHWR_REGISTER_VALIDITY_CHECKING
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102 int registers_valid[NUMREGS];
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103 int *_registers_valid = registers_valid;
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104 #endif
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105
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106 #ifndef CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT // this should go away
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107 // Interrupt control.
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108 static volatile __PFI __interruptible_control;
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109 #endif
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110
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111 //-----------------------------------------------------------------------------
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112 // Register access
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113
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114 // Return the currently-saved value corresponding to register REG of
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115 // the exception context.
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116 target_register_t
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117 get_register (regnames_t reg)
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118 {
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119 return _registers[reg];
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120 }
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121
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122 #ifdef CYGHWR_REGISTER_VALIDITY_CHECKING
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123 // Return the validity of register REG.
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124 int
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125 get_register_valid (regnames_t reg)
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126 {
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127 return _registers_valid[reg];
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128 }
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129 #endif
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130
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131 // Store VALUE in the register corresponding to WHICH in the exception
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132 // context.
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133 void
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134 put_register (regnames_t which, target_register_t value)
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135 {
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136 _registers[which] = value;
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137 }
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138
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139 //-----------------------------------------------------------------------------
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140 // Serial stuff
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141 #ifdef CYGPKG_CYGMON
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142 extern void ecos_bsp_console_putc(char);
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143 extern char ecos_bsp_console_getc(void);
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144 #endif
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146 // Write C to the current serial port.
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147 void
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148 putDebugChar (int c)
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149 {
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150 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT
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151 __call_if_debug_procs_t __debug_procs = CYGACC_CALL_IF_DEBUG_PROCS();
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152 CYGACC_COMM_IF_PUTC(*__debug_procs, c);
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153 #elif defined(CYGPKG_CYGMON)
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154 ecos_bsp_console_putc(c);
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155 #else
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156 HAL_STUB_PLATFORM_PUT_CHAR(c);
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157 #endif
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158 }
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159
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160 // Read one character from the current serial port.
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161 int
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162 getDebugChar (void)
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163 {
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164 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT
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165 __call_if_debug_procs_t __debug_procs = CYGACC_CALL_IF_DEBUG_PROCS();
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166 return CYGACC_COMM_IF_GETC(*__debug_procs);
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167 #elif defined(CYGPKG_CYGMON)
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168 return ecos_bsp_console_getc();
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169 #else
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170 return HAL_STUB_PLATFORM_GET_CHAR();
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171 #endif
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172 }
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173
138
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174 // Flush output channel
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175 void
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176 hal_flush_output(void)
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177 {
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178 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT
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179 __call_if_debug_procs_t __debug_procs = CYGACC_CALL_IF_DEBUG_PROCS();
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180 CYGACC_COMM_IF_CONTROL(*__debug_procs, __COMMCTL_FLUSH_OUTPUT);
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181 #endif
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182 }
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183
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184
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185 // Set the baud rate for the current serial port.
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186 void
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187 __set_baud_rate (int baud)
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188 {
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189 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT
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190 __call_if_debug_procs_t __debug_procs = CYGACC_CALL_IF_DEBUG_PROCS();
107
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191 CYGACC_COMM_IF_CONTROL(*__debug_procs, __COMMCTL_SETBAUD, baud);
101
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192 #elif defined(CYGPKG_CYGMON)
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193 // FIXME!
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194 #else
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195 HAL_STUB_PLATFORM_SET_BAUD_RATE(baud);
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196 #endif
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197 }
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198
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199 //-----------------------------------------------------------------------------
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200 // GDB interrupt (BREAK) support.
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201
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202 #ifdef CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT
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203
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204 #ifndef CYGPKG_HAL_ARM
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205
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206 #if (HAL_BREAKINST_SIZE == 1)
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207 typedef cyg_uint8 t_inst;
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208 #elif (HAL_BREAKINST_SIZE == 2)
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209 typedef cyg_uint16 t_inst;
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210 #elif (HAL_BREAKINST_SIZE == 4)
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211 typedef cyg_uint32 t_inst;
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212 #else
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213 #error "Don't know how to handle that size"
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214 #endif
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215
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216 typedef struct
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217 {
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218 t_inst *targetAddr;
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219 t_inst savedInstr;
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220 } instrBuffer;
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221
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222 static instrBuffer break_buffer;
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223
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224 volatile int cyg_hal_gdb_running_step = 0;
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225
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226 void
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227 cyg_hal_gdb_place_break (target_register_t pc)
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228 {
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229 cyg_hal_gdb_interrupt( pc ); // Let's hope this becomes a drop-through:
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230 }
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231
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232 void
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233 cyg_hal_gdb_interrupt (target_register_t pc)
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234 {
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235 CYGARC_HAL_SAVE_GP();
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236
50
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237 // Clear flag that we Continued instead of Stepping
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238 cyg_hal_gdb_running_step = 0;
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239 // and override existing break? So that a ^C takes effect...
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240 if (NULL != break_buffer.targetAddr)
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241 cyg_hal_gdb_remove_break( (target_register_t)break_buffer.targetAddr );
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242
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243 if (NULL == break_buffer.targetAddr) {
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244 break_buffer.targetAddr = (t_inst*) pc;
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245 break_buffer.savedInstr = *(t_inst*)pc;
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246 *(t_inst*)pc = (t_inst)HAL_BREAKINST;
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247
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248 __data_cache(CACHE_FLUSH);
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249 __instruction_cache(CACHE_FLUSH);
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250 }
101
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251
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252 CYGARC_HAL_RESTORE_GP();
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253 }
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254
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255 int
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256 cyg_hal_gdb_remove_break (target_register_t pc)
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257 {
48
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258 if ( cyg_hal_gdb_running_step )
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259 return 0;
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260
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261 if ((t_inst*)pc == break_buffer.targetAddr) {
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262 *(t_inst*)pc = break_buffer.savedInstr;
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263 break_buffer.targetAddr = NULL;
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264
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265 __data_cache(CACHE_FLUSH);
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266 __instruction_cache(CACHE_FLUSH);
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267 return 1;
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268 }
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269 return 0;
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270 }
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271
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272 int
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273 cyg_hal_gdb_break_is_set (void)
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274 {
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275 if (NULL != break_buffer.targetAddr) {
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276 return 1;
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277 }
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278 return 0;
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279 }
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280
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281 #endif // CYGPKG_HAL_ARM
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282
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283 #endif // CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT
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284
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285 // Use this function to disable serial interrupts whenever reply
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286 // characters are expected from GDB. The reason we want to control
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287 // whether the target can be interrupted or not is simply that GDB on
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288 // the host will be sending acknowledge characters/commands while the
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289 // stub is running - if serial interrupts were still active, the
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290 // characters would never reach the (polling) getDebugChar.
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291 static void
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292 interruptible(int state)
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293 {
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294 static int __interrupts_suspended = 0;
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295
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296 if (state) {
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297 __interrupts_suspended--;
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298 if (0 >= __interrupts_suspended) {
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299 __interrupts_suspended = 0;
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300 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT // this _check_ should go away
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301 {
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302 hal_virtual_comm_table_t* __chan;
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303 __chan = CYGACC_CALL_IF_DEBUG_PROCS();
107
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304 CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_IRQ_ENABLE);
105
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305 }
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306 #else
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307 if (__interruptible_control)
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308 __interruptible_control(1);
105
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309 #endif
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310 }
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311 } else {
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312 __interrupts_suspended++;
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313 if (1 == __interrupts_suspended)
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314 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT // this _check_ should go away
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315 {
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316 hal_virtual_comm_table_t* __chan;
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317 __chan = CYGACC_CALL_IF_DEBUG_PROCS();
107
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318 CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_IRQ_DISABLE);
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319 }
105
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320 #else
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321 if (__interruptible_control)
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322 __interruptible_control(0);
105
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323 #endif
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324 }
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325 }
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326
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327 //-----------------------------------------------------------------------------
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328 // eCos stub entry and exit magic.
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329
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330 #ifdef CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT
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331 int cyg_hal_gdb_break;
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332 #endif
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333
154
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334 // Called at stub *kill*
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335 static void
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336 handle_exception_exit( void )
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337 {
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338 int i;
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339
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340 for (i = 0; i < (sizeof(registers)/sizeof(registers[0])); i++)
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341 registers[i] = orig_registers[i];
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342 }
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343
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344 // Called at stub *entry*
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345 static void
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346 handle_exception_cleanup( void )
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347 {
154
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348 static int orig_registers_set = 0;
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349
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350 interruptible(0);
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351
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352 // Expand the HAL_SavedRegisters structure into the GDB register
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353 // array format.
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354 HAL_GET_GDB_REGISTERS(&registers[0], _hal_registers);
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355 _registers = &registers[0];
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356
154
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357 if (!orig_registers_set) {
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358 int i;
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359 for (i = 0; i < (sizeof(registers)/sizeof(registers[0])); i++)
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360 orig_registers[i] = registers[i];
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361 orig_registers_set = 1;
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362 }
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363
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364 #ifdef HAL_STUB_PLATFORM_STUBS_FIXUP
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365 // Some architectures may need to fix the PC in case of a partial
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366 // or fully executed trap instruction. GDB only takes correct action
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367 // when the PC is pointing to the breakpoint instruction it set.
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368 //
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369 // Most architectures would leave PC pointing at the trap
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370 // instruction itself though, and so do not need to do anything
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371 // special.
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372 HAL_STUB_PLATFORM_STUBS_FIXUP();
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373 #endif
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374
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375 #ifdef CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT
48
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376 // If we continued instead of stepping, when there was a break set
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377 // ie. we were stepping within a critical region, clear the break, and
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378 // that flag. If we stopped for some other reason, this has no effect.
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379 if ( cyg_hal_gdb_running_step ) {
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380 cyg_hal_gdb_running_step = 0;
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381 cyg_hal_gdb_remove_break(get_register (PC));
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382 }
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383
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384 // FIXME: (there may be a better way to do this)
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385 // If we hit a breakpoint set by the gdb interrupt stub, make it
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386 // seem like an interrupt rather than having hit a breakpoint.
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387 cyg_hal_gdb_break = cyg_hal_gdb_remove_break(get_register (PC));
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388 #endif
136
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389
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390 #if defined(HAL_STUB_HW_WATCHPOINT) || defined(HAL_STUB_HW_BREAKPOINT)
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391 // For HW watchpoint/breakpoint support, we need to know if we
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392 // stopped because of watchpoint or hw break. We do that here
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393 // before GDB has a chance to remove the watchpoints and save
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394 // the information for later use in building response packets.
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395 _hw_stop_reason = HAL_STUB_IS_STOPPED_BY_HARDWARE(_watch_data_addr);
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396 #endif
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397 }
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398
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399 // Called at stub *exit*
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400 static void
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401 handle_exception_init( void )
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402 {
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403 // Compact register array again.
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404 HAL_SET_GDB_REGISTERS(_hal_registers, &registers[0]);
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405
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406 interruptible(1);
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407 }
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408
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409
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410 //-----------------------------------------------------------------------------
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411 // Initialization.
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412
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413 // Signal handler.
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414 int
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415 cyg_hal_process_signal (int signal)
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416 {
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417 // We don't care about the signal (atm).
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418 return 0;
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419 }
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420
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421 // Install the standard set of trap handlers for the stub.
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422 void
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423 __install_traps (void)
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424 {
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425 // Set signal handling vector so we can treat 'C<signum>' as 'c'.
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426 __process_signal_vec = &cyg_hal_process_signal;
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427 // Set exit vector to reset vector. This will allow automatic reset on
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428 // some platforms.
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429 __process_exit_vec = &handle_exception_exit;
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430
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431 __cleanup_vec = &handle_exception_cleanup;
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432 __init_vec = &handle_exception_init;
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433
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434 #ifndef CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT // this should go away
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435 #ifdef CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT
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436 // Control of GDB interrupts.
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437 __interruptible_control = HAL_STUB_PLATFORM_INTERRUPTIBLE;
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438 #endif
105
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439 #endif
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440
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441 // Nothing further to do, handle_exception will be called when an
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442 // exception occurs.
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443 }
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444
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445 // Initialize the hardware.
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446 void
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447 initHardware (void)
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448 {
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449 static int initialized = 0;
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450
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451 if (initialized)
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452 return;
103
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453 initialized = 1;
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454
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455 // Get serial port initialized.
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456 HAL_STUB_PLATFORM_INIT_SERIAL();
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457
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458 #ifdef HAL_STUB_PLATFORM_INIT
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459 // If the platform defines any initialization code, call it here.
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460 HAL_STUB_PLATFORM_INIT();
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461 #endif
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462
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463 #ifndef CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT // this should go away
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464 #ifdef CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT
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465 // Get interrupt handler initialized.
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466 HAL_STUB_PLATFORM_INIT_BREAK_IRQ();
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467 #endif
110
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468 #endif // !CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT
2
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469 }
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470
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471 // Reset the board.
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472 void
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473 __reset (void)
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474 {
101
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diff changeset
475 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT
107
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476 __call_if_reset_t __rom_reset = CYGACC_CALL_IF_RESET_GET();
101
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diff changeset
477 if (__rom_reset)
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diff changeset
478 __rom_reset();
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diff changeset
479 #else
151
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diff changeset
480 HAL_PLATFORM_RESET();
76
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481 #endif
2
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482 }
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483
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484 //-----------------------------------------------------------------------------
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485 // Breakpoint support.
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486
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487 #ifndef CYGPKG_HAL_ARM
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488 // This function will generate a breakpoint exception. It is used at
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489 // the beginning of a program to sync up with a debugger and can be
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490 // used otherwise as a quick means to stop program execution and
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491 // "break" into the debugger.
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492 void
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493 breakpoint()
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494 {
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495 HAL_BREAKPOINT(_breakinst);
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diff changeset
496 }
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497
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498 // This function returns the opcode for a 'trap' instruction.
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499 unsigned long
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500 __break_opcode ()
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501 {
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502 return HAL_BREAKINST;
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diff changeset
503 }
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504 #endif
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505
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506 //-----------------------------------------------------------------------------
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507 // Write the 'T' packet in BUFFER. SIGVAL is the signal the program received.
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508 void
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509 __build_t_packet (int sigval, char *buf)
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510 {
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511 target_register_t addr;
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512 char *ptr = buf;
143
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513 target_register_t extend_val = 0;
2
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514
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515 *ptr++ = 'T';
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516 *ptr++ = __tohex (sigval >> 4);
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517 *ptr++ = __tohex (sigval);
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518
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519 #ifdef CYGDBG_HAL_DEBUG_GDB_THREAD_SUPPORT
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520 // Include thread ID if thread manipulation is required.
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521 {
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diff changeset
522 int id;
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523
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524 *ptr++ = 't';
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525 *ptr++ = 'h';
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526 *ptr++ = 'r';
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527 *ptr++ = 'e';
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528 *ptr++ = 'a';
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529 *ptr++ = 'd';
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530 *ptr++ = ':';
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531
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532 #if (CYG_BYTEORDER == CYG_MSBFIRST)
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533 id = dbg_currthread_id ();
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diff changeset
534 #else
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535 // FIXME: Temporary workaround for PR 18903. Thread ID must be
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536 // big-endian in the T packet.
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537 {
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538 unsigned char* bep = (unsigned char*)&id;
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diff changeset
539 int be_id;
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540
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diff changeset
541 be_id = dbg_currthread_id ();
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542 *bep++ = (be_id >> 24) & 0xff ;
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543 *bep++ = (be_id >> 16) & 0xff ;
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544 *bep++ = (be_id >> 8) & 0xff ;
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545 *bep++ = (be_id & 0xff) ;
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546 }
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547 #endif
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548 ptr = __mem2hex((char *)&id, ptr, sizeof(id), 0);
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549 *ptr++ = ';';
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550 }
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551 #endif
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552
136
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553 #ifdef HAL_STUB_HW_WATCHPOINT
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554 switch(_hw_stop_reason) {
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555 case HAL_STUB_HW_STOP_WATCH:
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556 case HAL_STUB_HW_STOP_RWATCH:
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diff changeset
557 case HAL_STUB_HW_STOP_AWATCH:
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diff changeset
558 strcpy(ptr, _hw_stop_str[_hw_stop_reason]);
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559 ptr += strlen(_hw_stop_str[_hw_stop_reason]);
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560 *ptr++ = ':';
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diff changeset
561 // Send address MSB first
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diff changeset
562 ptr += __intToHex(ptr, (target_register_t)_watch_data_addr,
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diff changeset
563 sizeof(_watch_data_addr) * 8);
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564 *ptr++ = ';';
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diff changeset
565 break;
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diff changeset
566 default:
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diff changeset
567 break;
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568 }
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569 #endif
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570
2
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571 *ptr++ = __tohex (PC >> 4);
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572 *ptr++ = __tohex (PC);
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573 *ptr++ = ':';
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574 addr = get_register (PC);
112
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575 if (sizeof(addr) < REGSIZE(PC))
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576 {
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577 // GDB is expecting REGSIZE(PC) number of bytes.
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diff changeset
578 // We only have sizeof(addr) number. Let's fill
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diff changeset
579 // the appropriate number of bytes intelligently.
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580 #ifdef CYGARC_SIGN_EXTEND_REGISTERS
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diff changeset
581 {
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diff changeset
582 unsigned long bits_in_addr = (sizeof(addr) << 3); // ie Size in bytes * 8
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583 target_register_t sign_bit_mask = (1 << (bits_in_addr - 1));
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584 if ((addr & sign_bit_mask) == sign_bit_mask)
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585 extend_val = ~0;
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586 }
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diff changeset
587 #endif
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588 }
143
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589 #if (CYG_BYTEORDER == CYG_MSBFIRST)
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590 ptr = __mem2hex((char *)&extend_val, ptr, REGSIZE(PC) - sizeof(addr), 0);
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591 #endif
121
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diff changeset
592 ptr = __mem2hex((char *)&addr, ptr, sizeof(addr), 0);
143
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593 #if (CYG_BYTEORDER == CYG_LSBFIRST)
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diff changeset
594 ptr = __mem2hex((char *)&extend_val, ptr, REGSIZE(PC) - sizeof(addr), 0);
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595 #endif
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596 *ptr++ = ';';
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597
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598 *ptr++ = __tohex (SP >> 4);
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599 *ptr++ = __tohex (SP);
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600 *ptr++ = ':';
112
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diff changeset
601 addr = (target_register_t) get_register (SP);
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602 if (sizeof(addr) < REGSIZE(SP))
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diff changeset
603 {
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604 // GDB is expecting REGSIZE(SP) number of bytes.
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diff changeset
605 // We only have sizeof(addr) number. Let's fill
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diff changeset
606 // the appropriate number of bytes intelligently.
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diff changeset
607 target_register_t extend_val = 0;
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diff changeset
608 #ifdef CYGARC_SIGN_EXTEND_REGISTERS
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diff changeset
609 {
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diff changeset
610 unsigned long bits_in_addr = (sizeof(addr) << 3); // ie Size in bytes * 8
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diff changeset
611 target_register_t sign_bit_mask = (1 << (bits_in_addr - 1));
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diff changeset
612 if ((addr & sign_bit_mask) == sign_bit_mask)
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diff changeset
613 extend_val = ~0;
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614 }
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diff changeset
615 #endif
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diff changeset
616 ptr = __mem2hex((char *)&extend_val, ptr, REGSIZE(SP) - sizeof(addr), 0);
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617 }
121
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diff changeset
618 ptr = __mem2hex((char *)&addr, ptr, sizeof(addr), 0);
2
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619 *ptr++ = ';';
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620
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621 *ptr++ = 0;
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622 }
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diff changeset
623
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624
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625 //-----------------------------------------------------------------------------
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diff changeset
626 // Cache functions.
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diff changeset
627
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diff changeset
628 // Perform the specified operation on the instruction cache.
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629 // Returns 1 if the cache is enabled, 0 otherwise.
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jlarmour
parents:
diff changeset
630 int
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
631 __instruction_cache (cache_control_t request)
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
632 {
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
633 int state = 1;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
634
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
635 switch (request) {
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
636 case CACHE_ENABLE:
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
637 HAL_ICACHE_ENABLE();
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
638 break;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
639 case CACHE_DISABLE:
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
640 HAL_ICACHE_DISABLE();
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
641 state = 0;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
642 break;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
643 case CACHE_FLUSH:
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
644 HAL_ICACHE_SYNC();
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
645 break;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
646 case CACHE_NOOP:
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
647 /* fall through */
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
648 default:
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
649 break;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
650 }
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
651
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
652 #ifdef HAL_ICACHE_IS_ENABLED
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
653 HAL_ICACHE_IS_ENABLED(state);
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
654 #endif
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
655
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
656 return state;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
657 }
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
658
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
659 // Perform the specified operation on the data cache.
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
660 // Returns 1 if the cache is enabled, 0 otherwise.
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
661 int
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
662 __data_cache (cache_control_t request)
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
663 {
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
664 int state = 1;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
665
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
666 switch (request) {
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
667 case CACHE_ENABLE:
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
668 HAL_DCACHE_ENABLE();
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
669 break;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
670 case CACHE_DISABLE:
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
671 HAL_DCACHE_DISABLE();
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
672 state = 0;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
673 break;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
674 case CACHE_FLUSH:
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
675 HAL_DCACHE_SYNC();
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
676 break;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
677 case CACHE_NOOP:
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
678 /* fall through */
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
679 default:
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
680 break;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
681 }
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
682 #ifdef HAL_DCACHE_IS_ENABLED
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
683 HAL_DCACHE_IS_ENABLED(state);
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
684 #endif
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
685
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
686 return state;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
687 }
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
688
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
689 //-----------------------------------------------------------------------------
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
690 // Memory accessor functions.
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
691
130
eb9fd8c04db3 Merge from eCos master repository on 2000-10-23-17:01:37-BST
jlarmour
parents: 121
diff changeset
692 // The __mem_fault_handler pointer is volatile since it is only
eb9fd8c04db3 Merge from eCos master repository on 2000-10-23-17:01:37-BST
jlarmour
parents: 121
diff changeset
693 // set/cleared by the function below - which does not rely on any
eb9fd8c04db3 Merge from eCos master repository on 2000-10-23-17:01:37-BST
jlarmour
parents: 121
diff changeset
694 // other functions, so the compiler may decide to not bother updating
eb9fd8c04db3 Merge from eCos master repository on 2000-10-23-17:01:37-BST
jlarmour
parents: 121
diff changeset
695 // the pointer at all. If any of the memory accesses cause an
eb9fd8c04db3 Merge from eCos master repository on 2000-10-23-17:01:37-BST
jlarmour
parents: 121
diff changeset
696 // exception, the pointer must be set to ensure the exception handler
eb9fd8c04db3 Merge from eCos master repository on 2000-10-23-17:01:37-BST
jlarmour
parents: 121
diff changeset
697 // can make use of it.
eb9fd8c04db3 Merge from eCos master repository on 2000-10-23-17:01:37-BST
jlarmour
parents: 121
diff changeset
698
eb9fd8c04db3 Merge from eCos master repository on 2000-10-23-17:01:37-BST
jlarmour
parents: 121
diff changeset
699 void* volatile __mem_fault_handler = (void *)0;
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
700
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
701 /* These are the "arguments" to __do_read_mem and __do_write_mem,
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
702 which are passed as globals to avoid squeezing them thru
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
703 __set_mem_fault_trap. */
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
704
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
705 static volatile target_register_t memCount;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
706
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
707 static void
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
708 __do_copy_mem (unsigned char* src, unsigned char* dst)
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
709 {
34
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
710 unsigned long *long_dst;
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
711 unsigned long *long_src;
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
712 unsigned short *short_dst;
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
713 unsigned short *short_src;
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
714
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
715 __mem_fault = 1; /* Defaults to 'fail'. Is cleared */
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
716 /* when the copy loop completes. */
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
717 __mem_fault_handler = &&err;
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
718
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
719 // See if it's safe to do multi-byte, aligned operations
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
720 while (memCount) {
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
721 if ((memCount >= sizeof(long)) &&
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
722 (((target_register_t)dst & (sizeof(long)-1)) == 0) &&
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
723 (((target_register_t)src & (sizeof(long)-1)) == 0)) {
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
724
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
725 long_dst = (unsigned long *)dst;
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
726 long_src = (unsigned long *)src;
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
727
34
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
728 *long_dst++ = *long_src++;
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
729 memCount -= sizeof(long);
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
730
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
731 dst = (unsigned char *)long_dst;
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
732 src = (unsigned char *)long_src;
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
733 } else if ((memCount >= sizeof(short)) &&
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
734 (((target_register_t)dst & (sizeof(short)-1)) == 0) &&
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
735 (((target_register_t)src & (sizeof(short)-1)) == 0)) {
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
736
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
737 short_dst = (unsigned short *)dst;
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
738 short_src = (unsigned short *)src;
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
739
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
740 *short_dst++ = *short_src++;
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
741 memCount -= sizeof(short);
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
742
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
743 dst = (unsigned char *)short_dst;
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
744 src = (unsigned char *)short_src;
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
745 } else {
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
746 *dst++ = *src++;
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
747 memCount--;
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
748 }
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
749 }
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
750
34
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
751 __mem_fault = 0;
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
752
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
753 err:
34
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
754 __mem_fault_handler = (void *)0;
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
755 }
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
756
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
757 /*
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
758 * __read_mem_safe:
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
759 * Get contents of target memory, abort on error.
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
760 */
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
761
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
762 int
34
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
763 __read_mem_safe (void *dst, void *src, int count)
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
764 {
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
765 memCount = count;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
766 __do_copy_mem((unsigned char*) src, (unsigned char*) dst);
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
767 return count - memCount; // return number of bytes successfully read
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
768 }
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
769
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
770 /*
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
771 * __write_mem_safe:
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
772 * Set contents of target memory, abort on error.
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
773 */
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
774
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
775 int
34
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
776 __write_mem_safe (void *src, void *dst, int count)
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
777 {
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
778 memCount = count;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
779 __do_copy_mem((unsigned char*) src, (unsigned char*) dst);
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
780 return count - memCount; // return number of bytes successfully written
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
781 }
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
782
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
783 //-----------------------------------------------------------------------------
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
784 // Target extras?!
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
785 int
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
786 __process_target_query(char * pkt, char * out, int maxOut)
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
787 { return 0 ; }
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
788 int
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
789 __process_target_set(char * pkt, char * out, int maxout)
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
790 { return 0 ; }
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
791 int
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
792 __process_target_packet(char * pkt, char * out, int maxout)
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
793 { return 0 ; }
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
794
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
795 // GDB string output, making sure interrupts are disabled.
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
796 // This function gets used by some diag output functions.
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
797 void
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
798 hal_output_gdb_string(target_register_t str, int string_len)
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
799 {
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
800 unsigned long __state;
8
ece80412419a Merge from eCos master repository on 1999-05-21-22:05:54-BST
jlarmour
parents: 6
diff changeset
801 HAL_DISABLE_INTERRUPTS(__state);
2
443894e2e912 Block commit of eCos version 1.2.1
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parents:
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802 __output_gdb_string(str, string_len);
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803 HAL_RESTORE_INTERRUPTS(__state);
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804 }
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805
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806 #endif // CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS