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annotate packages/hal/common/current/src/hal_stub.c @ 105:5a0cc6c243a9 ecos-sw-2000-06-30

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Merge from eCos master repository on 2000-06-30-08:18:49-BST
author jlarmour
date Fri, 30 Jun 2000 16:27:35 +0000
parents 95f3e12a6327
children 7f461c3a372c
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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 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
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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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58
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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 //-----------------------------------------------------------------------------
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67 // Extra eCos data.
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68
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69 // Saved registers.
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70 HAL_SavedRegisters *_hal_registers;
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71 target_register_t registers[NUMREGS];
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72 target_register_t alt_registers[NUMREGS] ; // Thread or saved process state
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73 target_register_t * _registers = registers; // Pointer to current set of registers
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75 #ifndef CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT // this should go away
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76 // Interrupt control.
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77 static volatile __PFI __interruptible_control;
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78 #endif
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79
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80 //-----------------------------------------------------------------------------
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81 // Register access
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82
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83 // Return the currently-saved value corresponding to register REG of
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84 // the exception context.
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85 target_register_t
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86 get_register (regnames_t reg)
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87 {
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88 return _registers[reg];
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89 }
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90
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91 // Store VALUE in the register corresponding to WHICH in the exception
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92 // context.
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93 void
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94 put_register (regnames_t which, target_register_t value)
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95 {
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96 _registers[which] = value;
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97 }
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98
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99 //-----------------------------------------------------------------------------
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100 // Serial stuff
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101 #ifdef CYGPKG_CYGMON
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102 extern void ecos_bsp_console_putc(char);
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103 extern char ecos_bsp_console_getc(void);
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104 #endif
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105
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106 // Write C to the current serial port.
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107 void
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108 putDebugChar (int c)
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109 {
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110 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT
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111 __call_if_debug_procs_t __debug_procs = CYGACC_CALL_IF_DEBUG_PROCS();
103
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112 CYGACC_COMM_IF_PUTC(*__debug_procs)(CYGACC_COMM_IF_CH_DATA(*__debug_procs), c);
101
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113 #elif defined(CYGPKG_CYGMON)
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114 ecos_bsp_console_putc(c);
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115 #else
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116 HAL_STUB_PLATFORM_PUT_CHAR(c);
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117 #endif
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118 }
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119
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120 // Read one character from the current serial port.
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121 int
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122 getDebugChar (void)
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123 {
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124 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT
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125 __call_if_debug_procs_t __debug_procs = CYGACC_CALL_IF_DEBUG_PROCS();
103
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126 return CYGACC_COMM_IF_GETC(*__debug_procs)(CYGACC_COMM_IF_CH_DATA(*__debug_procs));
101
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127 #elif defined(CYGPKG_CYGMON)
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128 return ecos_bsp_console_getc();
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129 #else
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130 return HAL_STUB_PLATFORM_GET_CHAR();
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131 #endif
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132 }
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133
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134 // Set the baud rate for the current serial port.
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135 void
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136 __set_baud_rate (int baud)
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137 {
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138 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT
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139 __call_if_debug_procs_t __debug_procs = CYGACC_CALL_IF_DEBUG_PROCS();
103
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140 CYGACC_COMM_IF_CONTROL(*__debug_procs)(CYGACC_COMM_IF_CH_DATA(*__debug_procs), __COMMCTL_SETBAUD, baud);
101
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141 #elif defined(CYGPKG_CYGMON)
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142 // FIXME!
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143 #else
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144 HAL_STUB_PLATFORM_SET_BAUD_RATE(baud);
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145 #endif
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146 }
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147
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148 //-----------------------------------------------------------------------------
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149 // GDB interrupt (BREAK) support.
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150
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151 #ifdef CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT
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152
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153 #ifndef CYGPKG_HAL_ARM
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155 #if (HAL_BREAKINST_SIZE == 1)
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156 typedef cyg_uint8 t_inst;
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157 #elif (HAL_BREAKINST_SIZE == 2)
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158 typedef cyg_uint16 t_inst;
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159 #elif (HAL_BREAKINST_SIZE == 4)
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160 typedef cyg_uint32 t_inst;
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161 #else
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162 #error "Don't know how to handle that size"
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163 #endif
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164
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165 typedef struct
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166 {
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167 t_inst *targetAddr;
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168 t_inst savedInstr;
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169 } instrBuffer;
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170
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171 static instrBuffer break_buffer;
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172
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173 volatile int cyg_hal_gdb_running_step = 0;
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174
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175 void
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176 cyg_hal_gdb_place_break (target_register_t pc)
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177 {
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178 cyg_hal_gdb_interrupt( pc ); // Let's hope this becomes a drop-through:
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179 }
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180
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181 void
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182 cyg_hal_gdb_interrupt (target_register_t pc)
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183 {
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184 CYGARC_HAL_SAVE_GP();
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185
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186 // Clear flag that we Continued instead of Stepping
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187 cyg_hal_gdb_running_step = 0;
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188 // and override existing break? So that a ^C takes effect...
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189 if (NULL != break_buffer.targetAddr)
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190 cyg_hal_gdb_remove_break( (target_register_t)break_buffer.targetAddr );
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191
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192 if (NULL == break_buffer.targetAddr) {
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193 break_buffer.targetAddr = (t_inst*) pc;
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194 break_buffer.savedInstr = *(t_inst*)pc;
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195 *(t_inst*)pc = (t_inst)HAL_BREAKINST;
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196
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197 __data_cache(CACHE_FLUSH);
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198 __instruction_cache(CACHE_FLUSH);
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199 }
101
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200
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201 CYGARC_HAL_RESTORE_GP();
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202 }
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203
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204 int
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205 cyg_hal_gdb_remove_break (target_register_t pc)
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206 {
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207 if ( cyg_hal_gdb_running_step )
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208 return 0;
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209
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210 if ((t_inst*)pc == break_buffer.targetAddr) {
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211 *(t_inst*)pc = break_buffer.savedInstr;
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212 break_buffer.targetAddr = NULL;
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213
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214 __data_cache(CACHE_FLUSH);
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215 __instruction_cache(CACHE_FLUSH);
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216 return 1;
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217 }
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218 return 0;
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219 }
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220
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221 int
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222 cyg_hal_gdb_break_is_set (void)
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223 {
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224 if (NULL != break_buffer.targetAddr) {
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225 return 1;
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226 }
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227 return 0;
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228 }
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229
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230 #endif // CYGPKG_HAL_ARM
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231
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232 #endif // CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT
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233
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234 // Use this function to disable serial interrupts whenever reply
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235 // characters are expected from GDB. The reason we want to control
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236 // whether the target can be interrupted or not is simply that GDB on
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237 // the host will be sending acknowledge characters/commands while the
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238 // stub is running - if serial interrupts were still active, the
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239 // characters would never reach the (polling) getDebugChar.
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240 static void
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241 interruptible(int state)
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242 {
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243 static int __interrupts_suspended = 0;
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244
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245 if (state) {
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246 __interrupts_suspended--;
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247 if (0 >= __interrupts_suspended) {
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248 __interrupts_suspended = 0;
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249 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT // this _check_ should go away
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250 {
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251 hal_virtual_comm_table_t* __chan;
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252 __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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253 CYGACC_COMM_IF_CONTROL(*__chan)(CYGACC_COMM_IF_CH_DATA(*__chan), __COMMCTL_IRQ_ENABLE);
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254 }
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255 #else
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256 if (__interruptible_control)
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257 __interruptible_control(1);
105
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258 #endif
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259 }
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260 } else {
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261 __interrupts_suspended++;
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262 if (1 == __interrupts_suspended)
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263 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT // this _check_ should go away
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264 {
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265 hal_virtual_comm_table_t* __chan;
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266 __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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267 CYGACC_COMM_IF_CONTROL(*__chan)(CYGACC_COMM_IF_CH_DATA(*__chan), __COMMCTL_IRQ_DISABLE);
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268 }
105
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269 #else
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270 if (__interruptible_control)
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271 __interruptible_control(0);
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272 #endif
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273 }
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274 }
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275
101
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276 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT
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277 //-----------------------------------------------------------------------------
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278 // GDB O-packetizer function.
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279
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280 // This gets called via the virtual vector debug comms entry and
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281 // handles O-packetization. The debug comms entries are used for the
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282 // actual device IO.
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283
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284 static cyg_uint8
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285 cyg_hal_gdb_diag_getc(void* __ch_data)
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286 {
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287 cyg_uint8 __ch;
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288 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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289 CYGARC_HAL_SAVE_GP();
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290
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291 __ch = CYGACC_COMM_IF_GETC(*__chan)(CYGACC_COMM_IF_CH_DATA(*__chan));
101
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292
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293 CYGARC_HAL_RESTORE_GP();
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294
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295 return __ch;
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296 }
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297
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298
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299 static void
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300 cyg_hal_gdb_diag_putc(void* __ch_data, cyg_uint8 c)
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301 {
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302 static char line[100];
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303 static int pos = 0;
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304 CYGARC_HAL_SAVE_GP();
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305
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306 // No need to send CRs
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307 if( c == '\r' ) return;
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308
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309 line[pos++] = c;
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310
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311 if( c == '\n' || pos == sizeof(line) )
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312 {
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313 CYG_INTERRUPT_STATE old;
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314 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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315
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316 // Disable interrupts. This prevents GDB trying to interrupt us
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317 // while we are in the middle of sending a packet. The serial
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318 // receive interrupt will be seen when we re-enable interrupts
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319 // later.
105
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320 #ifdef CYG_HAL_STARTUP_ROM
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321 HAL_DISABLE_INTERRUPTS(old);
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322 #else
101
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323 CYG_HAL_GDB_ENTER_CRITICAL_IO_REGION(old);
105
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324 #endif
101
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325
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326 while(1)
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327 {
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328 static const char hex[] = "0123456789ABCDEF";
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329 cyg_uint8 csum = 0, c1;
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330 int i;
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331
103
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332 CYGACC_COMM_IF_PUTC(*__chan)(CYGACC_COMM_IF_CH_DATA(*__chan), '$');
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333 CYGACC_COMM_IF_PUTC(*__chan)(CYGACC_COMM_IF_CH_DATA(*__chan), 'O');
101
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334 csum += 'O';
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335 for( i = 0; i < pos; i++ )
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336 {
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337 char ch = line[i];
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338 char h = hex[(ch>>4)&0xF];
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339 char l = hex[ch&0xF];
103
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340 CYGACC_COMM_IF_PUTC(*__chan)(CYGACC_COMM_IF_CH_DATA(*__chan), h);
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341 CYGACC_COMM_IF_PUTC(*__chan)(CYGACC_COMM_IF_CH_DATA(*__chan), l);
101
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342 csum += h;
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343 csum += l;
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344 }
103
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345 CYGACC_COMM_IF_PUTC(*__chan)(CYGACC_COMM_IF_CH_DATA(*__chan), '#');
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346 CYGACC_COMM_IF_PUTC(*__chan)(CYGACC_COMM_IF_CH_DATA(*__chan), hex[(csum>>4)&0xF]);
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347 CYGACC_COMM_IF_PUTC(*__chan)(CYGACC_COMM_IF_CH_DATA(*__chan), hex[csum&0xF]);
101
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348
103
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349 c1 = CYGACC_COMM_IF_GETC(*__chan)(CYGACC_COMM_IF_CH_DATA(*__chan));
101
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350 if( c1 == '+' ) break;
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351
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352 if( cyg_hal_is_break( &c1 , 1 ) ) {
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353 // Caller's responsibility to react on this.
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354 CYGACC_CALL_IF_CONSOLE_INTERRUPT_FLAG_SET(1);
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355 break;
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356 }
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357 }
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358
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359 pos = 0;
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360 // And re-enable interrupts
105
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361 #ifdef CYG_HAL_STARTUP_ROM
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362 HAL_RESTORE_INTERRUPTS(old);
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363 #else
101
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364 CYG_HAL_GDB_LEAVE_CRITICAL_IO_REGION(old);
105
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365 #endif
101
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366 }
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367
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368 CYGARC_HAL_RESTORE_GP();
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369 }
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370
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371 static void
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372 cyg_hal_gdb_diag_write(void* __ch_data, const cyg_uint8* __buf,
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373 cyg_uint32 __len)
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374 {
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375 CYGARC_HAL_SAVE_GP();
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376
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377 while(__len-- > 0)
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378 cyg_hal_gdb_diag_putc(__ch_data, *__buf++);
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379
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380 CYGARC_HAL_RESTORE_GP();
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381 }
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382
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383 static void
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384 cyg_hal_gdb_diag_read(void* __ch_data, cyg_uint8* __buf, cyg_uint32 __len)
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385 {
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386 CYGARC_HAL_SAVE_GP();
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387
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388 while(__len-- > 0)
103
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389 *__buf++ = cyg_hal_gdb_diag_getc(__ch_data);
101
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390
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391 CYGARC_HAL_RESTORE_GP();
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392 }
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393
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394 static int
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395 cyg_hal_gdb_diag_control(void *__ch_data, __comm_control_cmd_t __func, ...)
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396 {
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397 // Do nothing (yet).
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398 return 0;
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399 }
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400 #endif
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401
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402
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403 //-----------------------------------------------------------------------------
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404 // eCos stub entry and exit magic.
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405
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406 #ifdef CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT
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407 int cyg_hal_gdb_break;
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408 #endif
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409
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410 // Called at stub *entry*
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411 static void
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412 handle_exception_cleanup( void )
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413 {
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414 interruptible(0);
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415
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416 // Expand the HAL_SavedRegisters structure into the GDB register
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417 // array format.
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418 HAL_GET_GDB_REGISTERS(&registers[0], _hal_registers);
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419 _registers = &registers[0];
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420
8
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421 #ifdef HAL_STUB_PLATFORM_STUBS_FIXUP
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422 // Some architectures may need to fix the PC in case of a partial
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423 // or fully executed trap instruction. GDB only takes correct action
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424 // when the PC is pointing to the breakpoint instruction it set.
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425 //
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426 // Most architectures would leave PC pointing at the trap
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427 // instruction itself though, and so do not need to do anything
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428 // special.
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429 HAL_STUB_PLATFORM_STUBS_FIXUP();
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430 #endif
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431
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432 #ifdef CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT
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433 // If we continued instead of stepping, when there was a break set
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434 // ie. we were stepping within a critical region, clear the break, and
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435 // that flag. If we stopped for some other reason, this has no effect.
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436 if ( cyg_hal_gdb_running_step ) {
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437 cyg_hal_gdb_running_step = 0;
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438 cyg_hal_gdb_remove_break(get_register (PC));
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439 }
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440
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441 // FIXME: (there may be a better way to do this)
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442 // If we hit a breakpoint set by the gdb interrupt stub, make it
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443 // seem like an interrupt rather than having hit a breakpoint.
101
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444 cyg_hal_gdb_break = cyg_hal_gdb_remove_break(get_register (PC));
2
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445 #endif
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446 }
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447
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448 // Called at stub *exit*
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449 static void
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450 handle_exception_init( void )
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451 {
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diff changeset
452 // Compact register array again.
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453 HAL_SET_GDB_REGISTERS(_hal_registers, &registers[0]);
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454
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455 interruptible(1);
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456 }
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457
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458
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459 //-----------------------------------------------------------------------------
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460 // Initialization.
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461
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462 // Signal handler.
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463 int
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464 cyg_hal_process_signal (int signal)
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465 {
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466 // We don't care about the signal (atm).
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467 return 0;
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468 }
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469
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diff changeset
470 // Install the standard set of trap handlers for the stub.
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471 void
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472 __install_traps (void)
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473 {
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474 // Set signal handling vector so we can treat 'C<signum>' as 'c'.
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475 __process_signal_vec = &cyg_hal_process_signal;
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476 // Set exit vector to reset vector. This will allow automatic reset on
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477 // some platforms.
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478 __process_exit_vec = &__reset;
2
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479
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480 __cleanup_vec = &handle_exception_cleanup;
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481 __init_vec = &handle_exception_init;
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482
105
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483 #ifndef CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT // this should go away
2
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484 #ifdef CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT
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485 // Control of GDB interrupts.
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486 __interruptible_control = HAL_STUB_PLATFORM_INTERRUPTIBLE;
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487 #endif
105
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488 #endif
2
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489
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490 // Nothing further to do, handle_exception will be called when an
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491 // exception occurs.
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492 }
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493
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494 // Initialize the hardware.
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495 void
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496 initHardware (void)
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497 {
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498 static int initialized = 0;
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499
103
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500 if (initialized)
101
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501 return;
103
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502 initialized = 1;
2
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503
76
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504 #if !defined(CYGPKG_CYGMON)
101
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505 // Get serial port initialized.
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506 HAL_STUB_PLATFORM_INIT_SERIAL();
2
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507
101
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508 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT
103
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509 {
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diff changeset
510 hal_virtual_comm_table_t* comm;
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diff changeset
511 int cur = CYGACC_CALL_IF_SET_CONSOLE_COMM()(CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT);
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512
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513 // Initialize mangler procs
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514 CYGACC_CALL_IF_SET_CONSOLE_COMM()(CYGNUM_CALL_IF_SET_COMM_ID_MANGLER);
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515 comm = CYGACC_CALL_IF_CONSOLE_PROCS();
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516 CYGACC_COMM_IF_WRITE_SET(*comm, cyg_hal_gdb_diag_write);
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517 CYGACC_COMM_IF_READ_SET(*comm, cyg_hal_gdb_diag_read);
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518 CYGACC_COMM_IF_PUTC_SET(*comm, cyg_hal_gdb_diag_putc);
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519 CYGACC_COMM_IF_GETC_SET(*comm, cyg_hal_gdb_diag_getc);
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diff changeset
520 CYGACC_COMM_IF_CONTROL_SET(*comm, cyg_hal_gdb_diag_control);
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521
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522 // Now either restore the previous console channel, or let the
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523 // mangler stay in its place. The latter happens if the
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524 // console channel was previously unspecified, or if the
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525 // previous channel matches the used for GDB communication.
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526 if (CYGNUM_CALL_IF_SET_COMM_ID_EMPTY != cur
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527 && CYGNUM_HAL_VIRTUAL_VECTOR_DEBUG_CHANNEL != cur)
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528 CYGACC_CALL_IF_SET_CONSOLE_COMM()(cur);
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529
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530 // Set the debug channel.
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diff changeset
531 CYGACC_CALL_IF_SET_DEBUG_COMM()(CYGNUM_HAL_VIRTUAL_VECTOR_DEBUG_CHANNEL);
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532 }
105
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533
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534 #ifdef HAL_STUB_PLATFORM_INIT
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diff changeset
535 // If the platform defines any initialization code, call it here.
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536 HAL_STUB_PLATFORM_INIT();
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diff changeset
537 #endif
101
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diff changeset
538 #endif
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diff changeset
539
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540 #ifndef CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT
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541 #ifdef CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT
101
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diff changeset
542 // Get interrupt handler initialized.
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543 HAL_STUB_PLATFORM_INIT_BREAK_IRQ();
2
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544 #endif
101
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545 #endif // CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT
76
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546 #endif // CYGPKG_CYGMON
101
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547
2
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548 }
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549
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550 // Reset the board.
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551 void
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552 __reset (void)
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553 {
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diff changeset
554 #if !defined(CYGPKG_CYGMON)
101
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555 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT
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556 __call_if_reset_t __rom_reset = CYGACC_CALL_IF_RESET();
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diff changeset
557 if (__rom_reset)
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558 __rom_reset();
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diff changeset
559 #else
2
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560 HAL_STUB_PLATFORM_RESET();
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561 #endif
101
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562 #endif
2
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563 }
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564
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565 //-----------------------------------------------------------------------------
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566 // Breakpoint support.
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567
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568 #ifndef CYGPKG_HAL_ARM
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569 // This function will generate a breakpoint exception. It is used at
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570 // the beginning of a program to sync up with a debugger and can be
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571 // used otherwise as a quick means to stop program execution and
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572 // "break" into the debugger.
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573 void
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574 breakpoint()
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575 {
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576 HAL_BREAKPOINT(_breakinst);
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577 }
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578
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579 // This function returns the opcode for a 'trap' instruction.
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580 unsigned long
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581 __break_opcode ()
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582 {
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583 return HAL_BREAKINST;
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584 }
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585 #endif
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586
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587 // FIXME: Add support for multiple breakpoints (libstub/bplist-dynamic.c)
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588 int __set_breakpoint (target_register_t addr) { return 0; }
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589 int __remove_breakpoint (target_register_t addr) { return 0; }
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590
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591 //-----------------------------------------------------------------------------
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592 // Write the 'T' packet in BUFFER. SIGVAL is the signal the program received.
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diff changeset
593 void
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594 __build_t_packet (int sigval, char *buf)
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595 {
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596 target_register_t addr;
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597 char *ptr = buf;
6
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598 target_register_t sp;
2
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599
6
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600 sp = (target_register_t) get_register (SP);
2
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601
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602 *ptr++ = 'T';
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603 *ptr++ = __tohex (sigval >> 4);
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604 *ptr++ = __tohex (sigval);
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605
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606 #ifdef CYGDBG_HAL_DEBUG_GDB_THREAD_SUPPORT
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607 // Include thread ID if thread manipulation is required.
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parents:
diff changeset
608 {
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
609 int id;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
610
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
611 *ptr++ = 't';
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
612 *ptr++ = 'h';
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
613 *ptr++ = 'r';
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
614 *ptr++ = 'e';
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
615 *ptr++ = 'a';
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
616 *ptr++ = 'd';
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
617 *ptr++ = ':';
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
618
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
619 #if (CYG_BYTEORDER == CYG_MSBFIRST)
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
620 id = dbg_currthread_id ();
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
621 #else
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
622 // FIXME: Temporary workaround for PR 18903. Thread ID must be
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
623 // big-endian in the T packet.
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
624 {
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
625 unsigned char* bep = (unsigned char*)&id;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
626 int be_id;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
627
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
628 be_id = dbg_currthread_id ();
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
629 *bep++ = (be_id >> 24) & 0xff ;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
630 *bep++ = (be_id >> 16) & 0xff ;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
631 *bep++ = (be_id >> 8) & 0xff ;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
632 *bep++ = (be_id & 0xff) ;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
633 }
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
634 #endif
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
635 ptr = __mem2hex((char *)&id, ptr, sizeof(id), 0);
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
636 *ptr++ = ';';
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
637 }
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
638 #endif
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
639
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
640 *ptr++ = __tohex (PC >> 4);
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
641 *ptr++ = __tohex (PC);
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
642 *ptr++ = ':';
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
643 addr = get_register (PC);
34
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
644 ptr = __mem2hex((char *)&addr, ptr, REGSIZE(PC), 0);
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
645 *ptr++ = ';';
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
646
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
647 *ptr++ = __tohex (SP >> 4);
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
648 *ptr++ = __tohex (SP);
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
649 *ptr++ = ':';
34
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
650 ptr = __mem2hex((char *)&sp, ptr, REGSIZE(SP), 0);
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
651 *ptr++ = ';';
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
652
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
653 *ptr++ = 0;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
654 }
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
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 // Cache functions.
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
659
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
660 // Perform the specified operation on the instruction cache.
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
661 // Returns 1 if the cache is enabled, 0 otherwise.
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
662 int
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
663 __instruction_cache (cache_control_t request)
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
664 {
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
665 int state = 1;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
666
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
667 switch (request) {
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
668 case CACHE_ENABLE:
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
669 HAL_ICACHE_ENABLE();
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
670 break;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
671 case CACHE_DISABLE:
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
672 HAL_ICACHE_DISABLE();
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
673 state = 0;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
674 break;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
675 case CACHE_FLUSH:
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
676 HAL_ICACHE_SYNC();
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
677 break;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
678 case CACHE_NOOP:
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
679 /* fall through */
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
680 default:
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
681 break;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
682 }
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
683
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
684 #ifdef HAL_ICACHE_IS_ENABLED
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
685 HAL_ICACHE_IS_ENABLED(state);
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
686 #endif
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 return state;
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
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
691 // Perform the specified operation on the data cache.
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
692 // Returns 1 if the cache is enabled, 0 otherwise.
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
693 int
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
694 __data_cache (cache_control_t request)
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
695 {
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
696 int state = 1;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
697
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
698 switch (request) {
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
699 case CACHE_ENABLE:
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
700 HAL_DCACHE_ENABLE();
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
701 break;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
702 case CACHE_DISABLE:
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
703 HAL_DCACHE_DISABLE();
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
704 state = 0;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
705 break;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
706 case CACHE_FLUSH:
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
707 HAL_DCACHE_SYNC();
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
708 break;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
709 case CACHE_NOOP:
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
710 /* fall through */
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
711 default:
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
712 break;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
713 }
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
714 #ifdef HAL_DCACHE_IS_ENABLED
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
715 HAL_DCACHE_IS_ENABLED(state);
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
716 #endif
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
717
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
718 return state;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
719 }
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
720
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
721 //-----------------------------------------------------------------------------
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
722 // Memory accessor functions.
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
723
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
724 void *__mem_fault_handler = (void *)0;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
725
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
726 /* 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
727 which are passed as globals to avoid squeezing them thru
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
728 __set_mem_fault_trap. */
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
729
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
730 static volatile target_register_t memCount;
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
731
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
732 static void
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
733 __do_copy_mem (unsigned char* src, unsigned char* dst)
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
734 {
34
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
735 unsigned long *long_dst;
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
736 unsigned long *long_src;
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
737 unsigned short *short_dst;
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
738 unsigned short *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 __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
741 /* when the copy loop completes. */
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
742 __mem_fault_handler = &&err;
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
743
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
744 // 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
745 while (memCount) {
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
746 if ((memCount >= sizeof(long)) &&
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
747 (((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
748 (((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
749
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
750 long_dst = (unsigned long *)dst;
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
751 long_src = (unsigned long *)src;
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
752
34
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
753 *long_dst++ = *long_src++;
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
754 memCount -= sizeof(long);
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
755
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
756 dst = (unsigned char *)long_dst;
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
757 src = (unsigned char *)long_src;
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
758 } else if ((memCount >= sizeof(short)) &&
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
759 (((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
760 (((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
761
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
762 short_dst = (unsigned short *)dst;
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
763 short_src = (unsigned short *)src;
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
764
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
765 *short_dst++ = *short_src++;
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
766 memCount -= sizeof(short);
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
767
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
768 dst = (unsigned char *)short_dst;
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
769 src = (unsigned char *)short_src;
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
770 } else {
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
771 *dst++ = *src++;
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
772 memCount--;
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
773 }
2
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
34
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
776 __mem_fault = 0;
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 err:
34
29bc183297e1 Merge from eCos master repository on 1999-09-02-16:26:10-BST
jlarmour
parents: 30
diff changeset
779 __mem_fault_handler = (void *)0;
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents:
diff changeset
780 }
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 * __read_mem_safe:
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784 * Get contents of target memory, abort on error.
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785 */
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786
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787 int
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788 __read_mem_safe (void *dst, void *src, int count)
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789 {
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790 memCount = count;
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791 __do_copy_mem((unsigned char*) src, (unsigned char*) dst);
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792 return count - memCount; // return number of bytes successfully read
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793 }
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794
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795 /*
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796 * __write_mem_safe:
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797 * Set contents of target memory, abort on error.
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798 */
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799
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800 int
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801 __write_mem_safe (void *src, void *dst, int count)
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802 {
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803 memCount = count;
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804 __do_copy_mem((unsigned char*) src, (unsigned char*) dst);
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805 return count - memCount; // return number of bytes successfully written
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806 }
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807
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808 //-----------------------------------------------------------------------------
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809 // Target extras?!
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810 int
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811 __process_target_query(char * pkt, char * out, int maxOut)
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812 { return 0 ; }
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813 int
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814 __process_target_set(char * pkt, char * out, int maxout)
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815 { return 0 ; }
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816 int
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817 __process_target_packet(char * pkt, char * out, int maxout)
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818 { return 0 ; }
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819
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820 // GDB string output, making sure interrupts are disabled.
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821 // This function gets used by some diag output functions.
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822 void
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823 hal_output_gdb_string(target_register_t str, int string_len)
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824 {
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825 unsigned long __state;
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826 HAL_DISABLE_INTERRUPTS(__state);
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827 __output_gdb_string(str, string_len);
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828 HAL_RESTORE_INTERRUPTS(__state);
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829 }
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830
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831 #endif // CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS