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annotate packages/hal/common/current/src/hal_if.c @ 156:b939e9cada46

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Merge from eCos master repository on 2001-03-29-21:44:39-BST
author jlarmour
date Fri, 06 Apr 2001 17:20:13 +0000
parents 25e238959bae
children 511f4dc167f6
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1 //=============================================================================
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2 //
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3 // hal_if.c
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4 //
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5 // ROM/RAM interfacing functions
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6 //
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7 //=============================================================================
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8 //####COPYRIGHTBEGIN####
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9 //
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10 // -------------------------------------------
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11 // The contents of this file are subject to the Red Hat eCos Public License
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12 // Version 1.1 (the "License"); you may not use this file except in
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13 // compliance with the License. You may obtain a copy of the License at
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14 // http://www.redhat.com/
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15 //
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16 // Software distributed under the License is distributed on an "AS IS"
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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18 // License for the specific language governing rights and limitations under
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19 // the License.
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20 //
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21 // The Original Code is eCos - Embedded Configurable Operating System,
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22 // released September 30, 1998.
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23 //
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24 // The Initial Developer of the Original Code is Red Hat.
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25 // Portions created by Red Hat are
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26 // Copyright (C) 1998, 1999, 2000, 2001 Red Hat, Inc.
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27 // All Rights Reserved.
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28 // -------------------------------------------
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29 //
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30 //####COPYRIGHTEND####
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31 //=============================================================================
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32 //#####DESCRIPTIONBEGIN####
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33 //
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34 // Author(s): jskov
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35 // Contributors:jskov
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36 // Date: 2000-06-07
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37 //
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38 //####DESCRIPTIONEND####
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39 //
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40 //=============================================================================
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41
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42 #include <pkgconf/hal.h>
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43
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44 #ifdef CYGPKG_KERNEL
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45 # include <pkgconf/kernel.h>
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46 #endif
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47
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48 #include <cyg/infra/cyg_ass.h> // assertions
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49
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50 #include <cyg/hal/hal_arch.h> // set/restore GP
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51
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52 #include <cyg/hal/hal_io.h> // IO macros
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53 #include <cyg/hal/hal_if.h> // our interface
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54
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55 #include <cyg/hal/hal_diag.h> // Diag IO
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56 #include <cyg/hal/hal_misc.h> // User break
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57
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58 #include <cyg/hal/hal_stub.h> // stub functionality
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59
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60 #include <cyg/hal/hal_intr.h> // hal_vsr_table and others
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61
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62 #ifdef CYGPKG_REDBOOT
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63 #include <pkgconf/redboot.h>
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64 #ifdef CYGSEM_REDBOOT_FLASH_CONFIG
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65 #include <redboot.h>
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66 #include <flash_config.h>
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67 #endif
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68 #endif
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69
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70 //--------------------------------------------------------------------------
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71
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72 externC void patch_dbg_syscalls(void * vector);
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73 externC void init_thread_syscall(void * vector);
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74
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75 //--------------------------------------------------------------------------
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76 // Implementations and function wrappers for monitor services
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77
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78 // flash config state queries
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79 #ifdef CYGSEM_REDBOOT_FLASH_CONFIG
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80
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81 static __call_if_flash_cfg_op_fn_t flash_config_op;
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82
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83 static cyg_bool
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84 flash_config_op( int op, char * key, void *val, int type)
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85 {
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86 switch ( op ) {
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87 case CYGNUM_CALL_IF_FLASH_CFG_GET:
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88 return flash_get_config( key, val, type );
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89 default:
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90 // nothing else supported yet - though it is expected that "set"
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91 // will fit the same set of arguments, potentially.
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92 break;
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93 }
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94 return 0;
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95 }
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96 #endif
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97
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98 //----------------------------
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99 // Delay uS
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100 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_DELAY_US
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101
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102 static __call_if_delay_us_t delay_us;
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103
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104 static void
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105 delay_us(cyg_int32 usecs)
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106 {
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107 CYGARC_HAL_SAVE_GP();
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108 #ifdef CYGPKG_KERNEL
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109 {
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110 cyg_int32 start, elapsed;
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111 cyg_int32 usec_ticks, slice;
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112
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113 // How many ticks total we should wait for.
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114 usec_ticks = usecs*CYGNUM_KERNEL_COUNTERS_RTC_PERIOD;
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115 usec_ticks /= CYGNUM_HAL_RTC_NUMERATOR/CYGNUM_HAL_RTC_DENOMINATOR/1000;
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116
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117 do {
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118 // Spin in slices of 1/2 the RTC period. Allows interrupts
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119 // time to run without messing up the algorithm. If we spun
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120 // for 1 period (or more) of the RTC, there'd be also problems
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121 // figuring out when the timer wrapped. We may lose a tick or
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122 // two for each cycle but it shouldn't matter much.
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123 slice = usec_ticks % (CYGNUM_KERNEL_COUNTERS_RTC_PERIOD / 2);
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124
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125 HAL_CLOCK_READ(&start);
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126 do {
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127 HAL_CLOCK_READ(&elapsed);
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128 elapsed = (elapsed - start); // counts up!
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129 if (elapsed < 0)
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130 elapsed += CYGNUM_KERNEL_COUNTERS_RTC_PERIOD;
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131 } while (elapsed < slice);
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132
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133 // Adjust by elapsed, not slice, since an interrupt may have
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134 // been stalling us for some time.
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135 usec_ticks -= elapsed;
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136 } while (usec_ticks > 0);
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137 }
151
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138 #else // CYGPKG_KERNEL
136
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139 #ifdef HAL_DELAY_US
110
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140 // Use a HAL feature if defined
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141 HAL_DELAY_US(usecs);
136
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142 #else
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143 // If no accurate delay mechanism, just spin for a while. Having
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144 // an inaccurate delay is much better than no delay at all. The
143
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145 // count of 10 should mean the loop takes something resembling
136
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146 // 1us on most CPUs running between 30-100MHz [depends on how many
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147 // instructions this compiles to, how many dispatch units can be
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148 // used for the simple loop, actual CPU frequency, etc]
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149 while (usecs-- > 0) {
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150 int i;
143
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151 for (i = 0; i < 10; i++);
136
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152 }
151
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153 #endif // HAL_DELAY_US
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154 #endif // CYGPKG_KERNEL
143
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155 CYGARC_HAL_RESTORE_GP();
105
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156 }
151
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157 #endif // CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_DELAY_US
101
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158
151
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159 // Reset functions
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160 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_RESET
156
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161
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162 static __call_if_reset_t reset;
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163
101
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164 static void
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165 reset(void)
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166 {
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167 CYGARC_HAL_SAVE_GP();
101
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168 // With luck, the platform defines some magic that will cause a hardware
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169 // reset.
151
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170 HAL_PLATFORM_RESET();
101
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171
151
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172 #ifdef HAL_PLATFORM_RESET_ENTRY
101
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173 // If that's not the case (above is an empty statement) there may
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174 // be defined an address we can jump to - and effectively
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175 // reinitialize the system. Not quite as good as a reset, but it
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176 // is often enough.
151
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177 goto *HAL_PLATFORM_RESET_ENTRY;
101
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178
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179 #else
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180 #error " no RESET_ENTRY"
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181 #endif
105
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182
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183 CYGARC_HAL_RESTORE_GP();
101
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184 }
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185
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186 // This is the system's default kill signal routine. Unless overridden
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187 // by the application, it will cause a board reset when GDB quits the
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188 // connection. (The user can avoid the reset by using the GDB 'detach'
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189 // command instead of 'kill' or 'quit').
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190 static int
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191 kill_by_reset(int __irq_nr, void* __regs)
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192 {
105
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193 CYGARC_HAL_SAVE_GP();
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194
101
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195 reset();
105
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196
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197 CYGARC_HAL_RESTORE_GP();
101
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198 return 0;
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199 }
151
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200 #endif
101
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201
151
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202 //------------------------------------
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203 // NOP service
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204 #if defined(CYGSEM_HAL_VIRTUAL_VECTOR_INIT_WHOLE_TABLE) || \
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205 defined(CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_COMMS)
101
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206 static int
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207 nop_service(void)
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208 {
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209 // This is the default service. It always returns false (0), and
151
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210 // _does not_ trigger any assertions. Clients must either cope
101
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211 // with the service failure or assert.
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212 return 0;
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213 }
151
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214 #endif
101
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215
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216 //----------------------------------
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217 // Comm controls
151
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218 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_COMMS
101
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219
112
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220 #ifdef CYGNUM_HAL_VIRTUAL_VECTOR_AUX_CHANNELS
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221 #define CYGNUM_HAL_VIRTUAL_VECTOR_NUM_CHANNELS \
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222 (CYGNUM_HAL_VIRTUAL_VECTOR_COMM_CHANNELS+CYGNUM_HAL_VIRTUAL_VECTOR_AUX_CHANNELS)
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223 #else
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224 #define CYGNUM_HAL_VIRTUAL_VECTOR_NUM_CHANNELS \
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225 CYGNUM_HAL_VIRTUAL_VECTOR_COMM_CHANNELS
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226 #endif
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227
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228 static hal_virtual_comm_table_t comm_channels[CYGNUM_HAL_VIRTUAL_VECTOR_NUM_CHANNELS+1];
103
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229
101
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230 static int
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231 set_debug_comm(int __comm_id)
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232 {
103
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233 static int __selected_id = CYGNUM_CALL_IF_SET_COMM_ID_EMPTY;
105
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234 hal_virtual_comm_table_t* __chan;
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235 int interrupt_state = 0;
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236 int res = 1, update = 0;
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237 CYGARC_HAL_SAVE_GP();
101
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238
103
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239 CYG_ASSERT(__comm_id >= CYGNUM_CALL_IF_SET_COMM_ID_MANGLER
112
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240 && __comm_id < CYGNUM_HAL_VIRTUAL_VECTOR_NUM_CHANNELS,
101
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241 "Invalid channel");
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242
103
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243 switch (__comm_id) {
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244 case CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT:
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245 if (__selected_id > 0)
105
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246 res = __selected_id-1;
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247 else if (__selected_id == 0)
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248 res = CYGNUM_CALL_IF_SET_COMM_ID_MANGLER;
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249 else
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250 res = __selected_id;
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251 break;
101
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252
103
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253 case CYGNUM_CALL_IF_SET_COMM_ID_EMPTY:
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254 CYGACC_CALL_IF_DEBUG_PROCS_SET(0);
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255 __selected_id = __comm_id;
105
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256 break;
103
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257
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258 case CYGNUM_CALL_IF_SET_COMM_ID_MANGLER:
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259 __comm_id = 0;
105
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260 update = 1;
103
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261 break;
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262
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263 default:
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264 __comm_id++; // skip mangler entry
105
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265 update = 1;
103
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266 break;
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267 }
105
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268
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269 if (update) {
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270 // Find the interrupt state of the channel.
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271 __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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272 if (__chan)
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273 interrupt_state = CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_IRQ_DISABLE);
105
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274
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275 __selected_id = __comm_id;
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276 CYGACC_CALL_IF_DEBUG_PROCS_SET(comm_channels[__comm_id]);
101
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277
105
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278 // Set interrupt state on the new channel.
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279 __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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280 if (interrupt_state)
107
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281 CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_IRQ_ENABLE);
105
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282 else
107
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283 CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_IRQ_DISABLE);
105
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284 }
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285
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286 CYGARC_HAL_RESTORE_GP();
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287 return res;
101
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288 }
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289
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290 static int
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291 set_console_comm(int __comm_id)
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292 {
103
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293 static int __selected_id = CYGNUM_CALL_IF_SET_COMM_ID_EMPTY;
105
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294 int res = 1, update = 0;
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295 CYGARC_HAL_SAVE_GP();
101
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296
103
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297 CYG_ASSERT(__comm_id >= CYGNUM_CALL_IF_SET_COMM_ID_MANGLER
112
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298 && __comm_id < CYGNUM_HAL_VIRTUAL_VECTOR_NUM_CHANNELS,
101
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299 "Invalid channel");
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300
103
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301 switch (__comm_id) {
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302 case CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT:
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303 if (__selected_id > 0)
105
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304 res = __selected_id-1;
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305 else if (__selected_id == 0)
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306 res = CYGNUM_CALL_IF_SET_COMM_ID_MANGLER;
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307 else
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308 res = __selected_id;
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309 break;
101
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310
103
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311 case CYGNUM_CALL_IF_SET_COMM_ID_EMPTY:
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312 CYGACC_CALL_IF_CONSOLE_PROCS_SET(0);
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313 __selected_id = __comm_id;
105
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314 break;
103
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315
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316 case CYGNUM_CALL_IF_SET_COMM_ID_MANGLER:
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317 __comm_id = 0;
105
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318 update = 1;
103
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319 break;
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320
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321 default:
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322 __comm_id++; // skip mangler entry
105
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323 update = 1;
103
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324 break;
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325 }
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326
105
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327 if (update) {
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328 __selected_id = __comm_id;
101
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329
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330 CYGACC_CALL_IF_CONSOLE_PROCS_SET(comm_channels[__comm_id]);
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331 }
101
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332
105
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333 CYGARC_HAL_RESTORE_GP();
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334 return res;
101
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335 }
151
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336 #endif
101
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337
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338 //----------------------------------
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339 // Cache functions
151
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340 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_CACHE
101
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341
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342 static void
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343 flush_icache(void *__p, int __nbytes)
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344 {
105
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345 CYGARC_HAL_SAVE_GP();
101
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346 #ifdef HAL_ICACHE_FLUSH
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347 HAL_ICACHE_FLUSH( __p , __nbytes );
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348 #elif defined(HAL_ICACHE_INVALIDATE)
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349 HAL_ICACHE_INVALIDATE();
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350 #endif
105
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351 CYGARC_HAL_RESTORE_GP();
101
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352 }
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353
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354 static void
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355 flush_dcache(void *__p, int __nbytes)
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356 {
105
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357 CYGARC_HAL_SAVE_GP();
101
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358 #ifdef HAL_DCACHE_FLUSH
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359 HAL_DCACHE_FLUSH( __p , __nbytes );
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360 #elif defined(HAL_DCACHE_INVALIDATE)
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361 HAL_DCACHE_INVALIDATE();
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362 #endif
105
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363 CYGARC_HAL_RESTORE_GP();
101
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364 }
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365 #endif
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366
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367 #if defined(CYGSEM_HAL_VIRTUAL_VECTOR_DIAG)
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368 //-----------------------------------------------------------------------------
151
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369 // GDB console output mangler (O-packetizer)
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370 // COMMS init function at end.
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371
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372 // This gets called via the virtual vector console comms entry and
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373 // handles O-packetization. The debug comms entries are used for the
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374 // actual device IO.
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375 static cyg_uint8
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376 cyg_hal_diag_mangler_gdb_getc(void* __ch_data)
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377 {
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378 cyg_uint8 __ch;
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379 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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380 CYGARC_HAL_SAVE_GP();
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381
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382 __ch = CYGACC_COMM_IF_GETC(*__chan);
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383
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384 CYGARC_HAL_RESTORE_GP();
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385
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386 return __ch;
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387 }
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388
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389
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390 static void
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391 cyg_hal_diag_mangler_gdb_putc(void* __ch_data, cyg_uint8 c)
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392 {
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393 static char line[100];
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394 static int pos = 0;
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395 CYGARC_HAL_SAVE_GP();
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396
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397 // No need to send CRs
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398 if( c == '\r' ) return;
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399
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400 line[pos++] = c;
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401
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402 if( c == '\n' || pos == sizeof(line) )
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403 {
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404 CYG_INTERRUPT_STATE old;
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405 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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406
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407 // Disable interrupts. This prevents GDB trying to interrupt us
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408 // while we are in the middle of sending a packet. The serial
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409 // receive interrupt will be seen when we re-enable interrupts
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410 // later.
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411 #if defined(CYG_HAL_STARTUP_ROM) \
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412 || !defined(CYG_HAL_GDB_ENTER_CRITICAL_IO_REGION)
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413 HAL_DISABLE_INTERRUPTS(old);
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414 #else
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415 CYG_HAL_GDB_ENTER_CRITICAL_IO_REGION(old);
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416 #endif
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diff changeset
417
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418 while(1)
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419 {
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420 static const char hex[] = "0123456789ABCDEF";
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421 cyg_uint8 csum = 0, c1;
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422 int i;
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423
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424 CYGACC_COMM_IF_PUTC(*__chan, '$');
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425 CYGACC_COMM_IF_PUTC(*__chan, 'O');
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426 csum += 'O';
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427 for( i = 0; i < pos; i++ )
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428 {
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429 char ch = line[i];
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430 char h = hex[(ch>>4)&0xF];
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431 char l = hex[ch&0xF];
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432 CYGACC_COMM_IF_PUTC(*__chan, h);
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433 CYGACC_COMM_IF_PUTC(*__chan, l);
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434 csum += h;
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435 csum += l;
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436 }
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437 CYGACC_COMM_IF_PUTC(*__chan, '#');
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438 CYGACC_COMM_IF_PUTC(*__chan, hex[(csum>>4)&0xF]);
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439 CYGACC_COMM_IF_PUTC(*__chan, hex[csum&0xF]);
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440
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441 nak:
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442 c1 = CYGACC_COMM_IF_GETC(*__chan);
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443
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444 if( c1 == '+' ) break;
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445
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446 if( cyg_hal_is_break( &c1 , 1 ) ) {
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447 // Caller's responsibility to react on this.
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448 CYGACC_CALL_IF_CONSOLE_INTERRUPT_FLAG_SET(1);
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449 break;
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450 }
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451 if( c1 != '-' ) goto nak;
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452 }
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453
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454 pos = 0;
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455 // And re-enable interrupts
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456 #if defined(CYG_HAL_STARTUP_ROM) \
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457 || !defined(CYG_HAL_GDB_ENTER_CRITICAL_IO_REGION)
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458 HAL_RESTORE_INTERRUPTS(old);
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459 #else
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460 CYG_HAL_GDB_LEAVE_CRITICAL_IO_REGION(old);
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461 #endif
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462 }
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463
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464 CYGARC_HAL_RESTORE_GP();
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465 }
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466
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467 static void
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468 cyg_hal_diag_mangler_gdb_write(void* __ch_data,
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469 const cyg_uint8* __buf, cyg_uint32 __len)
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470 {
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471 CYGARC_HAL_SAVE_GP();
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472
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473 while(__len-- > 0)
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474 cyg_hal_diag_mangler_gdb_putc(__ch_data, *__buf++);
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475
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476 CYGARC_HAL_RESTORE_GP();
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477 }
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478
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479 static void
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480 cyg_hal_diag_mangler_gdb_read(void* __ch_data,
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481 cyg_uint8* __buf, cyg_uint32 __len)
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482 {
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483 CYGARC_HAL_SAVE_GP();
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484
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485 while(__len-- > 0)
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486 *__buf++ = cyg_hal_diag_mangler_gdb_getc(__ch_data);
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487
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488 CYGARC_HAL_RESTORE_GP();
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489 }
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490
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491 static int
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492 cyg_hal_diag_mangler_gdb_control(void *__ch_data,
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493 __comm_control_cmd_t __func, ...)
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494 {
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495 // Do nothing (yet).
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496 return 0;
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497 }
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498
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499 // This is the COMMS init function. It gets called both by the stubs
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500 // and diag init code to initialize the COMMS mangler channel table -
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501 // that's all. The callers have to decide whether to actually use this
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502 // channel.
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503 void
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504 cyg_hal_diag_mangler_gdb_init(void)
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505 {
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506 hal_virtual_comm_table_t* comm;
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507 int cur = CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT);
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508
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509 // Initialize mangler procs
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510 CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_MANGLER);
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511 comm = CYGACC_CALL_IF_CONSOLE_PROCS();
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512 CYGACC_COMM_IF_WRITE_SET(*comm, cyg_hal_diag_mangler_gdb_write);
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513 CYGACC_COMM_IF_READ_SET(*comm, cyg_hal_diag_mangler_gdb_read);
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514 CYGACC_COMM_IF_PUTC_SET(*comm, cyg_hal_diag_mangler_gdb_putc);
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515 CYGACC_COMM_IF_GETC_SET(*comm, cyg_hal_diag_mangler_gdb_getc);
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516 CYGACC_COMM_IF_CONTROL_SET(*comm, cyg_hal_diag_mangler_gdb_control);
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517
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518 // Restore the original console channel.
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519 CYGACC_CALL_IF_SET_CONSOLE_COMM(cur);
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520 }
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521
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522 //-----------------------------------------------------------------------------
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523 // Null console output mangler
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524 // COMMS init function at end.
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525
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526 // This gets called via the virtual vector console comms entry and
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527 // just forwards IO to the debug comms entries.
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528 // This differs from setting the console channel to the same as the
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529 // debug channel in that console output will go to the debug channel
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530 // even if the debug channel is changed.
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531 static cyg_uint8
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532 cyg_hal_diag_mangler_null_getc(void* __ch_data)
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533 {
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534 cyg_uint8 __ch;
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535 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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536 CYGARC_HAL_SAVE_GP();
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diff changeset
537
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diff changeset
538 __ch = CYGACC_COMM_IF_GETC(*__chan);
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539
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540 CYGARC_HAL_RESTORE_GP();
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541
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542 return __ch;
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543 }
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544
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545
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546 static void
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547 cyg_hal_diag_mangler_null_putc(void* __ch_data, cyg_uint8 c)
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548 {
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549 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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550
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551 CYGARC_HAL_SAVE_GP();
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552
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553 CYGACC_COMM_IF_PUTC(*__chan, c);
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554
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555 CYGARC_HAL_RESTORE_GP();
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556 }
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557
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558 static void
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559 cyg_hal_diag_mangler_null_write(void* __ch_data,
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560 const cyg_uint8* __buf, cyg_uint32 __len)
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561 {
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562 CYGARC_HAL_SAVE_GP();
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563
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564 while(__len-- > 0)
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565 cyg_hal_diag_mangler_null_putc(__ch_data, *__buf++);
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566
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567 CYGARC_HAL_RESTORE_GP();
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568 }
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569
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570 static void
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571 cyg_hal_diag_mangler_null_read(void* __ch_data,
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572 cyg_uint8* __buf, cyg_uint32 __len)
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573 {
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574 CYGARC_HAL_SAVE_GP();
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575
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576 while(__len-- > 0)
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577 *__buf++ = cyg_hal_diag_mangler_null_getc(__ch_data);
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578
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579 CYGARC_HAL_RESTORE_GP();
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580 }
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581
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582 static int
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583 cyg_hal_diag_mangler_null_control(void *__ch_data,
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584 __comm_control_cmd_t __func, ...)
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585 {
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586 // Do nothing (yet).
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587 return 0;
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588 }
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589
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590 // This is the COMMS init function. It gets called both by the stubs
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591 // and diag init code to initialize the COMMS mangler channel table -
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592 // that's all. The callers have to decide whether to actually use this
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593 // channel.
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594 void
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595 cyg_hal_diag_mangler_null_init(void)
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596 {
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597 hal_virtual_comm_table_t* comm;
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598 int cur = CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT);
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599
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600 // Initialize mangler procs
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601 CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_MANGLER);
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602 comm = CYGACC_CALL_IF_CONSOLE_PROCS();
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603 CYGACC_COMM_IF_WRITE_SET(*comm, cyg_hal_diag_mangler_null_write);
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604 CYGACC_COMM_IF_READ_SET(*comm, cyg_hal_diag_mangler_null_read);
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605 CYGACC_COMM_IF_PUTC_SET(*comm, cyg_hal_diag_mangler_null_putc);
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606 CYGACC_COMM_IF_GETC_SET(*comm, cyg_hal_diag_mangler_null_getc);
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607 CYGACC_COMM_IF_CONTROL_SET(*comm, cyg_hal_diag_mangler_null_control);
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608
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609 // Restore the original console channel.
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610 CYGACC_CALL_IF_SET_CONSOLE_COMM(cur);
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611 }
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612
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613 //-----------------------------------------------------------------------------
101
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614 // Console IO functions that adhere to the virtual vector table semantics in
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615 // order to ensure proper debug agent mangling when required.
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616 //
115
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617 externC void cyg_hal_plf_comms_init(void);
151
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618
105
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619 void
101
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620 hal_if_diag_init(void)
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621 {
156
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622 // This function may be called from various places and the code
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623 // should only run once.
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624 static cyg_uint8 called = 0;
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625 if (called) return;
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626 called = 1;
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627
151
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628 #ifndef CYGSEM_HAL_VIRTUAL_VECTOR_INHERIT_CONSOLE
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629
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630 #if defined(CYGDBG_HAL_DIAG_TO_DEBUG_CHAN)
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631 // Use the mangler channel, which in turn uses the debug channel.
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632 CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_MANGLER);
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633
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634 // Initialize the mangler channel.
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635 #if defined(CYGSEM_HAL_DIAG_MANGLER_GDB)
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636 cyg_hal_diag_mangler_gdb_init();
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637 #elif defined(CYGSEM_HAL_DIAG_MANGLER_None)
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638 cyg_hal_diag_mangler_null_init();
103
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639 #endif
101
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640
151
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641 #else // CYGDBG_HAL_DIAG_TO_DEBUG_CHAN
103
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642
151
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643 // Use an actual (raw) IO channel
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644 CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL);
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645
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646 #endif // CYGDBG_HAL_DIAG_TO_DEBUG_CHAN
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647
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648 #endif // CYGSEM_HAL_VIRTUAL_VECTOR_INHERIT_CONSOLE
101
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649 }
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650
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651 void
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652 hal_if_diag_write_char(char c)
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653 {
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654 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_CONSOLE_PROCS();
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655
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656 if (__chan)
107
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657 CYGACC_COMM_IF_PUTC(*__chan, c);
101
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658 else {
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659 __chan = CYGACC_CALL_IF_DEBUG_PROCS();
151
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660
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661 // FIXME: What should be done if assertions are not enabled?
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662 // This is a bad bad situation - we have no means for diag
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663 // output; we want to hit a breakpoint to alert the developer
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664 // or something like that.
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665 CYG_ASSERT(__chan, "No valid channel set");
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666
107
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667 CYGACC_COMM_IF_PUTC(*__chan, c);
101
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668 }
105
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diff changeset
669
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670 // Check interrupt flag
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671 if (CYGACC_CALL_IF_CONSOLE_INTERRUPT_FLAG()) {
136
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672 CYGACC_CALL_IF_CONSOLE_INTERRUPT_FLAG_SET(0);
105
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673 cyg_hal_user_break(0);
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674 }
101
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675 }
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676
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677 void
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678 hal_if_diag_read_char(char *c)
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679 {
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680 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_CONSOLE_PROCS();
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681
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682 if (__chan)
107
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683 *c = CYGACC_COMM_IF_GETC(*__chan);
101
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684 else {
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685 __chan = CYGACC_CALL_IF_DEBUG_PROCS();
151
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686
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687 // FIXME: What should be done if assertions are not enabled?
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688 // This is a bad bad situation - we have no means for diag
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689 // output; we want to hit a breakpoint to alert the developer
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690 // or something like that.
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691 CYG_ASSERT(__chan, "No valid channel set");
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692
107
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693 *c = CYGACC_COMM_IF_GETC(*__chan);
101
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694 }
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695 }
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696 #endif // CYGSEM_HAL_VIRTUAL_VECTOR_DIAG
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697
105
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698 //=============================================================================
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699 // CtrlC support
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700 //=============================================================================
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701
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702 #if defined(CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT) \
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703 || defined(CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT)
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704
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705 struct Hal_SavedRegisters *hal_saved_interrupt_state;
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diff changeset
706
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diff changeset
707 void
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708 hal_ctrlc_isr_init(void)
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709 {
110
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710 // A ROM monitor never enables the interrupt itself. This is left
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711 // to the (RAM) application.
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712 #ifndef CYGSEM_HAL_ROM_MONITOR
105
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713 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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714
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715 #if 1 // Prevents crash on older stubs
151
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716 int v_m;
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717 // Allow only ctrl-c interrupt enabling when version in table is
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718 // below legal max and above the necessary service, and _not_
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719 // the value we set it to below.
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720 v_m = CYGACC_CALL_IF_VERSION() & CYGNUM_CALL_IF_TABLE_VERSION_CALL_MASK;
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721 if (v_m >= CYGNUM_CALL_IF_TABLE_VERSION_CALL_MAX
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722 || v_m < CYGNUM_CALL_IF_SET_DEBUG_COMM
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723 || v_m == CYGNUM_CALL_IF_TABLE_VERSION_CALL_HACK)
105
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724 return;
110
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725
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726 // Now trash that value - otherwise downloading an image with
151
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727 // builtin stubs on a board with older stubs (which will cause the
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728 // version to be set to VERSION_CALL) may cause all subsequent
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729 // runs to (wrongly) fall through to the below code. If there is
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730 // a new stub on the board, it will reinitialize the version field
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731 // on reset. Yes, this is a gross hack!
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732 CYGACC_CALL_IF_VERSION_SET(CYGNUM_CALL_IF_TABLE_VERSION_CALL_HACK);
105
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733 #endif
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734
151
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735 // We can only enable interrupts on a valid debug channel.
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736 if (__chan)
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737 CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_IRQ_ENABLE);
110
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738 #endif
105
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739 }
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740
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741 cyg_uint32
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742 hal_ctrlc_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data)
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743 {
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744 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();
151
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745 int isr_ret = 0, ctrlc = 0;
105
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746
151
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747 if (__chan) {
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748 isr_ret = CYGACC_COMM_IF_DBG_ISR(*__chan, &ctrlc, vector, data);
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749 if (ctrlc)
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750 cyg_hal_user_break( (CYG_ADDRWORD *)hal_saved_interrupt_state );
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751 }
105
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752 return isr_ret;
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753 }
119
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754
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755 cyg_bool
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756 hal_ctrlc_check(CYG_ADDRWORD vector, CYG_ADDRWORD data)
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757 {
151
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758 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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759 int gdb_vector = vector-1;
119
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diff changeset
760 int isr_ret, ctrlc = 0;
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761
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762 // This check only to avoid crash on older stubs in case of unhandled
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763 // interrupts. It is a bit messy, but required in a transition period.
151
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764 if (__chan &&
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765 (CYGNUM_CALL_IF_TABLE_VERSION_CALL_HACK ==
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766 (CYGACC_CALL_IF_VERSION() & CYGNUM_CALL_IF_TABLE_VERSION_CALL_MASK))){
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767 gdb_vector = CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_DBG_ISR_VECTOR);
119
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768 }
145
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769 if (vector == gdb_vector) {
151
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770 isr_ret = CYGACC_COMM_IF_DBG_ISR(*__chan, &ctrlc, vector, data);
119
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771 if (ctrlc)
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772 cyg_hal_user_break( (CYG_ADDRWORD *)hal_saved_interrupt_state );
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773 return true;
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774 }
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775 return false;
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776 }
105
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777 #endif // CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT || CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT
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778
101
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779 //--------------------------------------------------------------------------
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780 // Init function. It should be called from the platform initialization code.
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781 // For monitor configurations it will initialize the calling interface table,
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782 // for client configurations it will patch the existing table as per
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783 // configuration.
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784 void
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785 hal_if_init(void)
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786 {
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787 //**********************************************************************
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788 //
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789 // Note that if your RAM application is configured to initialize
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790 // the whole table _or_ the communication channels, you _cannot_
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791 // step through this function with the debugger. If your channel
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792 // configurations are set to the default, you should be able to
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793 // simply step over this function though (or use 'finish' once you
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794 // have entered this function if that GDB command works).
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795 //
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796 // If you really do need to debug this code, the best approach is
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797 // to have a working RedBoot / GDB stub in ROM and then change the
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798 // hal_virtual_vector_table to reside at some other address in the
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799 // RAM configuration than that used by the ROM monitor. Then
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800 // you'll be able to use the ROM monitor to debug the below code
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801 // and check that it does the right thing.
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802 //
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803 // Note that if you have a ROM monitor in ROM/flash which does
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804 // support virtual vectors, you should be able to disable the
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805 // option CYGSEM_HAL_VIRTUAL_VECTOR_INIT_WHOLE_TABLE. On some
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806 // targets (which predate the introduction of virtual vectors)
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807 // that option is enabled per default and needs to be explicitly
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808 // disabled when you have an updated ROM monitor.
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809 //
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810 //**********************************************************************
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811
151
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812 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_INIT_WHOLE_TABLE
101
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813 {
151
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814 int i;
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815
101
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816 // Initialize tables with the NOP service.
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817 // This should only be done for service routine entries - data
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818 // pointers should be NULLed.
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819 for (i = 0; i < CYGNUM_CALL_IF_TABLE_SIZE; i++)
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820 hal_virtual_vector_table[i] = (CYG_ADDRWORD) &nop_service;
151
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821
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822 // Version number
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823 CYGACC_CALL_IF_VERSION_SET(CYGNUM_CALL_IF_TABLE_VERSION_CALL
156
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824 |((CYG_ADDRWORD)CYGNUM_CALL_IF_TABLE_VERSION_COMM<<CYGNUM_CALL_IF_TABLE_VERSION_COMM_shift));
151
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825 }
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826 #endif
101
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827
151
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828 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_ICTRL
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829 // ICTRL and EXC tables - I assume these to be the equivalents of
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830 // ISR and VSR tables.
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831 CYGACC_CALL_IF_ICTRL_TABLE_SET(hal_interrupt_handlers);
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832 CYGACC_CALL_IF_EXC_TABLE_SET(hal_vsr_table);
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833 #endif
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834
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835 // Miscellaneous services with wrappers in this file.
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836 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_RESET
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837 CYGACC_CALL_IF_RESET_SET(reset);
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838 CYGACC_CALL_IF_KILL_VECTOR_SET(kill_by_reset);
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839 #endif
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840 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_DELAY_US
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841 CYGACC_CALL_IF_DELAY_US_SET(delay_us);
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842 #endif
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843
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844 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_CACHE
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845 // Cache functions
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846 CYGACC_CALL_IF_FLUSH_ICACHE_SET(flush_icache);
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847 CYGACC_CALL_IF_FLUSH_DCACHE_SET(flush_dcache);
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848 #endif
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849
156
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850 #ifdef CYGSEM_REDBOOT_FLASH_CONFIG
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851 CYGACC_CALL_IF_FLASH_CFG_OP_SET(flash_config_op);
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852 #endif
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853
151
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854 // Data entries not currently supported in eCos
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855 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_DATA
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856 CYGACC_CALL_IF_CPU_DATA_SET(0);
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857 CYGACC_CALL_IF_BOARD_DATA_SET(0);
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858 CYGACC_CALL_IF_DBG_DATA_SET(0);
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859 #endif
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860
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861 // Comm controls
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862 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_COMMS
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863 {
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864 int i, j;
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865
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866 // Clear out tables with safe dummy function.
112
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867 for (j = 0; j < CYGNUM_HAL_VIRTUAL_VECTOR_NUM_CHANNELS+1; j++)
101
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868 for (i = 0; i < CYGNUM_COMM_IF_TABLE_SIZE; i++)
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869 comm_channels[j][i] = (CYG_ADDRWORD) &nop_service;
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870
151
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871 // Set accessor functions
101
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872 CYGACC_CALL_IF_SET_DEBUG_COMM_SET(set_debug_comm);
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873 CYGACC_CALL_IF_SET_CONSOLE_COMM_SET(set_console_comm);
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874
151
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875 // Initialize console/debug procs. Note that these _must_
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876 // be set to empty before the comms init call.
105
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877 set_debug_comm(CYGNUM_CALL_IF_SET_COMM_ID_EMPTY);
103
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878 set_console_comm(CYGNUM_CALL_IF_SET_COMM_ID_EMPTY);
101
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879
151
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880 // Initialize channels. This used to be done in
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881 // hal_diag_init() and the stub initHardware() functions, but
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882 // it makes more sense to have here.
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883 cyg_hal_plf_comms_init();
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884
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885 // Always set the debug channel. If stubs are included, it is
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886 // necessary. If no stubs are included it does not hurt and is
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887 // likely to be required by the hal_if_diag_init code anyway
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888 // as it may rely on it if using a mangler.
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889 set_debug_comm(CYGNUM_HAL_VIRTUAL_VECTOR_DEBUG_CHANNEL);
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890 // Set console channel to a safe default. hal_if_diag_init
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891 // will override with console channel or mangler if necessary.
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892 set_console_comm(CYGNUM_HAL_VIRTUAL_VECTOR_DEBUG_CHANNEL);
101
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893 }
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894
105
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895 // Reset console interrupt flag.
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896 CYGACC_CALL_IF_CONSOLE_INTERRUPT_FLAG_SET(0);
151
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897 #endif
105
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898
101
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899 // Set up services provided by clients
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900 #if defined(CYGFUN_HAL_COMMON_KERNEL_SUPPORT) && \
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901 ( defined(CYGSEM_HAL_USE_ROM_MONITOR_GDB_stubs) \
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902 || defined(CYGSEM_HAL_USE_ROM_MONITOR_CygMon))
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903
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904 patch_dbg_syscalls( (void *)(hal_virtual_vector_table) );
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905 #endif
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906
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907 // Init client services
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908 #if !defined(CYGPKG_KERNEL) && defined(CYGDBG_HAL_DEBUG_GDB_THREAD_SUPPORT)
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909 // Only include this code if we do not have a kernel. Otherwise
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910 // the kernel supplies the functionality for the app we are linked
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911 // with.
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912
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913 // Prepare for application installation of thread info function in
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914 // vector table.
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915 init_thread_syscall( (void *)&hal_virtual_vector_table[CYGNUM_CALL_IF_DBG_SYSCALL] );
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916 #endif
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917
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918 // Finally, install async breakpoint handler if it is configured in.
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919 // FIXME: this should probably check for STUBS instead (but code is
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920 // conditional on BREAK for now)
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921 #if defined(CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT)
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922 // Install async breakpoint handler into vector table.
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923 CYGACC_CALL_IF_INSTALL_BPT_FN_SET(&cyg_hal_gdb_interrupt);
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924 #endif
156
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925
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926 #if 0 != CYGINT_HAL_PLF_IF_INIT
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927 // Call platform specific initializations - should only be used
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928 // to augment what has already been set up, etc.
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929 plf_if_init();
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930 #endif
101
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931 }