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annotate packages/hal/common/current/src/hal_if.c @ 151:25e238959bae

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Merge from eCos master repository on 2001-02-12-23:44:24-GMT
author jlarmour
date Tue, 13 Feb 2001 01:23:16 +0000
parents 2e9a636d9de9
children b939e9cada46
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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
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63 //--------------------------------------------------------------------------
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64
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65 externC void patch_dbg_syscalls(void * vector);
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66 externC void init_thread_syscall(void * vector);
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67
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68 //--------------------------------------------------------------------------
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69 // Implementations and function wrappers for monitor services
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70
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71 //----------------------------
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72 // Delay uS
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73 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_DELAY_US
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75 static void
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76 delay_us(cyg_int32 usecs)
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77 {
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78 CYGARC_HAL_SAVE_GP();
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79 #ifdef CYGPKG_KERNEL
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80 {
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81 cyg_int32 start, elapsed;
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82 cyg_int32 usec_ticks, slice;
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83
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84 // How many ticks total we should wait for.
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85 usec_ticks = usecs*CYGNUM_KERNEL_COUNTERS_RTC_PERIOD;
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86 usec_ticks /= CYGNUM_HAL_RTC_NUMERATOR/CYGNUM_HAL_RTC_DENOMINATOR/1000;
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87
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88 do {
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89 // Spin in slices of 1/2 the RTC period. Allows interrupts
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90 // time to run without messing up the algorithm. If we spun
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91 // for 1 period (or more) of the RTC, there'd be also problems
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92 // figuring out when the timer wrapped. We may lose a tick or
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93 // two for each cycle but it shouldn't matter much.
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94 slice = usec_ticks % (CYGNUM_KERNEL_COUNTERS_RTC_PERIOD / 2);
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95
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96 HAL_CLOCK_READ(&start);
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97 do {
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98 HAL_CLOCK_READ(&elapsed);
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99 elapsed = (elapsed - start); // counts up!
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100 if (elapsed < 0)
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101 elapsed += CYGNUM_KERNEL_COUNTERS_RTC_PERIOD;
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102 } while (elapsed < slice);
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103
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104 // Adjust by elapsed, not slice, since an interrupt may have
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105 // been stalling us for some time.
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106 usec_ticks -= elapsed;
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107 } while (usec_ticks > 0);
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108 }
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109 #else // CYGPKG_KERNEL
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110 #ifdef HAL_DELAY_US
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111 // Use a HAL feature if defined
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112 HAL_DELAY_US(usecs);
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113 #else
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114 // If no accurate delay mechanism, just spin for a while. Having
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115 // an inaccurate delay is much better than no delay at all. The
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116 // count of 10 should mean the loop takes something resembling
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117 // 1us on most CPUs running between 30-100MHz [depends on how many
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118 // instructions this compiles to, how many dispatch units can be
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119 // used for the simple loop, actual CPU frequency, etc]
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120 while (usecs-- > 0) {
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121 int i;
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122 for (i = 0; i < 10; i++);
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123 }
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124 #endif // HAL_DELAY_US
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125 #endif // CYGPKG_KERNEL
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126 CYGARC_HAL_RESTORE_GP();
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127 }
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128 #endif // CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_DELAY_US
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129
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130 // Reset functions
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131 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_RESET
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132 static void
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133 reset(void)
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134 {
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135 CYGARC_HAL_SAVE_GP();
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136 // With luck, the platform defines some magic that will cause a hardware
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137 // reset.
151
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138 HAL_PLATFORM_RESET();
101
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139
151
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140 #ifdef HAL_PLATFORM_RESET_ENTRY
101
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141 // If that's not the case (above is an empty statement) there may
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142 // be defined an address we can jump to - and effectively
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143 // reinitialize the system. Not quite as good as a reset, but it
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144 // is often enough.
151
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145 goto *HAL_PLATFORM_RESET_ENTRY;
101
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146
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147 #else
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148 #error " no RESET_ENTRY"
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149 #endif
105
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150
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151 CYGARC_HAL_RESTORE_GP();
101
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152 }
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153
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154 // This is the system's default kill signal routine. Unless overridden
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155 // by the application, it will cause a board reset when GDB quits the
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156 // connection. (The user can avoid the reset by using the GDB 'detach'
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157 // command instead of 'kill' or 'quit').
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158 static int
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159 kill_by_reset(int __irq_nr, void* __regs)
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160 {
105
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161 CYGARC_HAL_SAVE_GP();
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162
101
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163 reset();
105
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164
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165 CYGARC_HAL_RESTORE_GP();
101
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166 return 0;
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167 }
151
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168 #endif
101
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169
151
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170 //------------------------------------
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171 // NOP service
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172 #if defined(CYGSEM_HAL_VIRTUAL_VECTOR_INIT_WHOLE_TABLE) || \
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173 defined(CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_COMMS)
101
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174 static int
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175 nop_service(void)
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176 {
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177 // This is the default service. It always returns false (0), and
151
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178 // _does not_ trigger any assertions. Clients must either cope
101
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179 // with the service failure or assert.
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180 return 0;
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181 }
151
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182 #endif
101
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183
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184 //----------------------------------
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185 // Comm controls
151
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186 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_COMMS
101
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187
112
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188 #ifdef CYGNUM_HAL_VIRTUAL_VECTOR_AUX_CHANNELS
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189 #define CYGNUM_HAL_VIRTUAL_VECTOR_NUM_CHANNELS \
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190 (CYGNUM_HAL_VIRTUAL_VECTOR_COMM_CHANNELS+CYGNUM_HAL_VIRTUAL_VECTOR_AUX_CHANNELS)
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191 #else
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192 #define CYGNUM_HAL_VIRTUAL_VECTOR_NUM_CHANNELS \
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193 CYGNUM_HAL_VIRTUAL_VECTOR_COMM_CHANNELS
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194 #endif
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195
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196 static hal_virtual_comm_table_t comm_channels[CYGNUM_HAL_VIRTUAL_VECTOR_NUM_CHANNELS+1];
103
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197
101
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198 static int
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199 set_debug_comm(int __comm_id)
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200 {
103
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201 static int __selected_id = CYGNUM_CALL_IF_SET_COMM_ID_EMPTY;
105
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202 hal_virtual_comm_table_t* __chan;
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203 int interrupt_state = 0;
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204 int res = 1, update = 0;
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205 CYGARC_HAL_SAVE_GP();
101
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206
103
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207 CYG_ASSERT(__comm_id >= CYGNUM_CALL_IF_SET_COMM_ID_MANGLER
112
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208 && __comm_id < CYGNUM_HAL_VIRTUAL_VECTOR_NUM_CHANNELS,
101
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209 "Invalid channel");
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210
103
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211 switch (__comm_id) {
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212 case CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT:
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213 if (__selected_id > 0)
105
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214 res = __selected_id-1;
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215 else if (__selected_id == 0)
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216 res = CYGNUM_CALL_IF_SET_COMM_ID_MANGLER;
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217 else
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218 res = __selected_id;
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219 break;
101
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220
103
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221 case CYGNUM_CALL_IF_SET_COMM_ID_EMPTY:
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222 CYGACC_CALL_IF_DEBUG_PROCS_SET(0);
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223 __selected_id = __comm_id;
105
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224 break;
103
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225
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226 case CYGNUM_CALL_IF_SET_COMM_ID_MANGLER:
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227 __comm_id = 0;
105
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228 update = 1;
103
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229 break;
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230
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231 default:
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232 __comm_id++; // skip mangler entry
105
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233 update = 1;
103
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234 break;
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235 }
105
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236
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237 if (update) {
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238 // Find the interrupt state of the channel.
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239 __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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240 if (__chan)
107
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241 interrupt_state = CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_IRQ_DISABLE);
105
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242
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243 __selected_id = __comm_id;
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244 CYGACC_CALL_IF_DEBUG_PROCS_SET(comm_channels[__comm_id]);
101
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245
105
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246 // Set interrupt state on the new channel.
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247 __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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248 if (interrupt_state)
107
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249 CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_IRQ_ENABLE);
105
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250 else
107
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251 CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_IRQ_DISABLE);
105
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252 }
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253
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254 CYGARC_HAL_RESTORE_GP();
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255 return res;
101
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256 }
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257
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258 static int
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259 set_console_comm(int __comm_id)
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260 {
103
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261 static int __selected_id = CYGNUM_CALL_IF_SET_COMM_ID_EMPTY;
105
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262 int res = 1, update = 0;
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263 CYGARC_HAL_SAVE_GP();
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264
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265 CYG_ASSERT(__comm_id >= CYGNUM_CALL_IF_SET_COMM_ID_MANGLER
112
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266 && __comm_id < CYGNUM_HAL_VIRTUAL_VECTOR_NUM_CHANNELS,
101
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267 "Invalid channel");
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268
103
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269 switch (__comm_id) {
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270 case CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT:
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271 if (__selected_id > 0)
105
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272 res = __selected_id-1;
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273 else if (__selected_id == 0)
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274 res = CYGNUM_CALL_IF_SET_COMM_ID_MANGLER;
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275 else
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276 res = __selected_id;
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277 break;
101
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278
103
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279 case CYGNUM_CALL_IF_SET_COMM_ID_EMPTY:
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280 CYGACC_CALL_IF_CONSOLE_PROCS_SET(0);
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281 __selected_id = __comm_id;
105
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282 break;
103
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283
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284 case CYGNUM_CALL_IF_SET_COMM_ID_MANGLER:
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285 __comm_id = 0;
105
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286 update = 1;
103
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287 break;
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288
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289 default:
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290 __comm_id++; // skip mangler entry
105
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291 update = 1;
103
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292 break;
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293 }
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294
105
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295 if (update) {
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296 __selected_id = __comm_id;
101
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297
105
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298 CYGACC_CALL_IF_CONSOLE_PROCS_SET(comm_channels[__comm_id]);
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299 }
101
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300
105
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301 CYGARC_HAL_RESTORE_GP();
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302 return res;
101
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303 }
151
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304 #endif
101
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305
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306 //----------------------------------
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307 // Cache functions
151
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308 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_CACHE
101
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309
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310 static void
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311 flush_icache(void *__p, int __nbytes)
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312 {
105
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313 CYGARC_HAL_SAVE_GP();
101
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314 #ifdef HAL_ICACHE_FLUSH
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315 HAL_ICACHE_FLUSH( __p , __nbytes );
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316 #elif defined(HAL_ICACHE_INVALIDATE)
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317 HAL_ICACHE_INVALIDATE();
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318 #endif
105
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319 CYGARC_HAL_RESTORE_GP();
101
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320 }
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321
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322 static void
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323 flush_dcache(void *__p, int __nbytes)
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324 {
105
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325 CYGARC_HAL_SAVE_GP();
101
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326 #ifdef HAL_DCACHE_FLUSH
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327 HAL_DCACHE_FLUSH( __p , __nbytes );
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328 #elif defined(HAL_DCACHE_INVALIDATE)
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329 HAL_DCACHE_INVALIDATE();
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330 #endif
105
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331 CYGARC_HAL_RESTORE_GP();
101
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332 }
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333 #endif
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334
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335 #if defined(CYGSEM_HAL_VIRTUAL_VECTOR_DIAG)
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336 //-----------------------------------------------------------------------------
151
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337 // GDB console output mangler (O-packetizer)
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338 // COMMS init function at end.
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339
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340 // This gets called via the virtual vector console comms entry and
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341 // handles O-packetization. The debug comms entries are used for the
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342 // actual device IO.
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343 static cyg_uint8
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344 cyg_hal_diag_mangler_gdb_getc(void* __ch_data)
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345 {
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346 cyg_uint8 __ch;
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347 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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348 CYGARC_HAL_SAVE_GP();
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349
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350 __ch = CYGACC_COMM_IF_GETC(*__chan);
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351
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352 CYGARC_HAL_RESTORE_GP();
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353
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354 return __ch;
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355 }
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356
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357
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358 static void
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359 cyg_hal_diag_mangler_gdb_putc(void* __ch_data, cyg_uint8 c)
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360 {
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361 static char line[100];
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362 static int pos = 0;
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363 CYGARC_HAL_SAVE_GP();
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364
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365 // No need to send CRs
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366 if( c == '\r' ) return;
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367
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368 line[pos++] = c;
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369
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370 if( c == '\n' || pos == sizeof(line) )
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371 {
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372 CYG_INTERRUPT_STATE old;
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373 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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374
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375 // Disable interrupts. This prevents GDB trying to interrupt us
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376 // while we are in the middle of sending a packet. The serial
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377 // receive interrupt will be seen when we re-enable interrupts
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378 // later.
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379 #if defined(CYG_HAL_STARTUP_ROM) \
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380 || !defined(CYG_HAL_GDB_ENTER_CRITICAL_IO_REGION)
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381 HAL_DISABLE_INTERRUPTS(old);
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382 #else
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383 CYG_HAL_GDB_ENTER_CRITICAL_IO_REGION(old);
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384 #endif
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385
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386 while(1)
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387 {
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388 static const char hex[] = "0123456789ABCDEF";
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389 cyg_uint8 csum = 0, c1;
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390 int i;
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391
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392 CYGACC_COMM_IF_PUTC(*__chan, '$');
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393 CYGACC_COMM_IF_PUTC(*__chan, 'O');
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394 csum += 'O';
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395 for( i = 0; i < pos; i++ )
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396 {
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397 char ch = line[i];
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398 char h = hex[(ch>>4)&0xF];
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399 char l = hex[ch&0xF];
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400 CYGACC_COMM_IF_PUTC(*__chan, h);
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401 CYGACC_COMM_IF_PUTC(*__chan, l);
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402 csum += h;
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403 csum += l;
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404 }
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405 CYGACC_COMM_IF_PUTC(*__chan, '#');
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406 CYGACC_COMM_IF_PUTC(*__chan, hex[(csum>>4)&0xF]);
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407 CYGACC_COMM_IF_PUTC(*__chan, hex[csum&0xF]);
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408
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409 nak:
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410 c1 = CYGACC_COMM_IF_GETC(*__chan);
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411
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412 if( c1 == '+' ) break;
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413
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414 if( cyg_hal_is_break( &c1 , 1 ) ) {
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415 // Caller's responsibility to react on this.
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416 CYGACC_CALL_IF_CONSOLE_INTERRUPT_FLAG_SET(1);
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417 break;
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418 }
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419 if( c1 != '-' ) goto nak;
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420 }
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421
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422 pos = 0;
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423 // And re-enable interrupts
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424 #if defined(CYG_HAL_STARTUP_ROM) \
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425 || !defined(CYG_HAL_GDB_ENTER_CRITICAL_IO_REGION)
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426 HAL_RESTORE_INTERRUPTS(old);
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427 #else
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428 CYG_HAL_GDB_LEAVE_CRITICAL_IO_REGION(old);
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429 #endif
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430 }
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431
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432 CYGARC_HAL_RESTORE_GP();
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433 }
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434
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435 static void
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436 cyg_hal_diag_mangler_gdb_write(void* __ch_data,
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437 const cyg_uint8* __buf, cyg_uint32 __len)
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438 {
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439 CYGARC_HAL_SAVE_GP();
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440
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441 while(__len-- > 0)
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442 cyg_hal_diag_mangler_gdb_putc(__ch_data, *__buf++);
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443
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444 CYGARC_HAL_RESTORE_GP();
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445 }
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446
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447 static void
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448 cyg_hal_diag_mangler_gdb_read(void* __ch_data,
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449 cyg_uint8* __buf, cyg_uint32 __len)
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450 {
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451 CYGARC_HAL_SAVE_GP();
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452
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453 while(__len-- > 0)
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454 *__buf++ = cyg_hal_diag_mangler_gdb_getc(__ch_data);
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455
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456 CYGARC_HAL_RESTORE_GP();
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457 }
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458
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459 static int
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460 cyg_hal_diag_mangler_gdb_control(void *__ch_data,
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461 __comm_control_cmd_t __func, ...)
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462 {
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463 // Do nothing (yet).
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464 return 0;
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465 }
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466
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467 // This is the COMMS init function. It gets called both by the stubs
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468 // and diag init code to initialize the COMMS mangler channel table -
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469 // that's all. The callers have to decide whether to actually use this
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470 // channel.
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471 void
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472 cyg_hal_diag_mangler_gdb_init(void)
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473 {
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474 hal_virtual_comm_table_t* comm;
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475 int cur = CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT);
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476
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477 // Initialize mangler procs
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478 CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_MANGLER);
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479 comm = CYGACC_CALL_IF_CONSOLE_PROCS();
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480 CYGACC_COMM_IF_WRITE_SET(*comm, cyg_hal_diag_mangler_gdb_write);
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481 CYGACC_COMM_IF_READ_SET(*comm, cyg_hal_diag_mangler_gdb_read);
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482 CYGACC_COMM_IF_PUTC_SET(*comm, cyg_hal_diag_mangler_gdb_putc);
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483 CYGACC_COMM_IF_GETC_SET(*comm, cyg_hal_diag_mangler_gdb_getc);
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484 CYGACC_COMM_IF_CONTROL_SET(*comm, cyg_hal_diag_mangler_gdb_control);
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485
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486 // Restore the original console channel.
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487 CYGACC_CALL_IF_SET_CONSOLE_COMM(cur);
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488 }
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489
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490 //-----------------------------------------------------------------------------
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491 // Null console output mangler
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492 // COMMS init function at end.
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493
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494 // This gets called via the virtual vector console comms entry and
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495 // just forwards IO to the debug comms entries.
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496 // This differs from setting the console channel to the same as the
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497 // debug channel in that console output will go to the debug channel
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498 // even if the debug channel is changed.
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499 static cyg_uint8
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500 cyg_hal_diag_mangler_null_getc(void* __ch_data)
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501 {
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502 cyg_uint8 __ch;
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503 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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504 CYGARC_HAL_SAVE_GP();
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505
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506 __ch = CYGACC_COMM_IF_GETC(*__chan);
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507
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508 CYGARC_HAL_RESTORE_GP();
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509
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510 return __ch;
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511 }
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diff changeset
512
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513
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514 static void
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515 cyg_hal_diag_mangler_null_putc(void* __ch_data, cyg_uint8 c)
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516 {
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517 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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diff changeset
518
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519 CYGARC_HAL_SAVE_GP();
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520
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521 CYGACC_COMM_IF_PUTC(*__chan, c);
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522
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523 CYGARC_HAL_RESTORE_GP();
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524 }
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525
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526 static void
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527 cyg_hal_diag_mangler_null_write(void* __ch_data,
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528 const cyg_uint8* __buf, cyg_uint32 __len)
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529 {
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530 CYGARC_HAL_SAVE_GP();
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531
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532 while(__len-- > 0)
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533 cyg_hal_diag_mangler_null_putc(__ch_data, *__buf++);
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534
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535 CYGARC_HAL_RESTORE_GP();
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536 }
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diff changeset
537
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538 static void
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539 cyg_hal_diag_mangler_null_read(void* __ch_data,
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540 cyg_uint8* __buf, cyg_uint32 __len)
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541 {
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542 CYGARC_HAL_SAVE_GP();
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543
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544 while(__len-- > 0)
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545 *__buf++ = cyg_hal_diag_mangler_null_getc(__ch_data);
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546
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547 CYGARC_HAL_RESTORE_GP();
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548 }
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549
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550 static int
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551 cyg_hal_diag_mangler_null_control(void *__ch_data,
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552 __comm_control_cmd_t __func, ...)
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553 {
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554 // Do nothing (yet).
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555 return 0;
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556 }
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557
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558 // This is the COMMS init function. It gets called both by the stubs
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559 // and diag init code to initialize the COMMS mangler channel table -
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560 // that's all. The callers have to decide whether to actually use this
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561 // channel.
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562 void
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563 cyg_hal_diag_mangler_null_init(void)
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564 {
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565 hal_virtual_comm_table_t* comm;
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566 int cur = CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT);
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567
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568 // Initialize mangler procs
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569 CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_MANGLER);
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570 comm = CYGACC_CALL_IF_CONSOLE_PROCS();
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571 CYGACC_COMM_IF_WRITE_SET(*comm, cyg_hal_diag_mangler_null_write);
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572 CYGACC_COMM_IF_READ_SET(*comm, cyg_hal_diag_mangler_null_read);
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573 CYGACC_COMM_IF_PUTC_SET(*comm, cyg_hal_diag_mangler_null_putc);
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574 CYGACC_COMM_IF_GETC_SET(*comm, cyg_hal_diag_mangler_null_getc);
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575 CYGACC_COMM_IF_CONTROL_SET(*comm, cyg_hal_diag_mangler_null_control);
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576
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577 // Restore the original console channel.
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578 CYGACC_CALL_IF_SET_CONSOLE_COMM(cur);
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579 }
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580
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581 //-----------------------------------------------------------------------------
101
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582 // Console IO functions that adhere to the virtual vector table semantics in
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583 // order to ensure proper debug agent mangling when required.
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584 //
115
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585 externC void cyg_hal_plf_comms_init(void);
151
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586
105
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587 void
101
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588 hal_if_diag_init(void)
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589 {
151
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590 #ifndef CYGSEM_HAL_VIRTUAL_VECTOR_INHERIT_CONSOLE
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591
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592 #if defined(CYGDBG_HAL_DIAG_TO_DEBUG_CHAN)
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593 // Use the mangler channel, which in turn uses the debug channel.
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594 CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_MANGLER);
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595
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596 // Initialize the mangler channel.
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597 #if defined(CYGSEM_HAL_DIAG_MANGLER_GDB)
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598 cyg_hal_diag_mangler_gdb_init();
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599 #elif defined(CYGSEM_HAL_DIAG_MANGLER_None)
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600 cyg_hal_diag_mangler_null_init();
103
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601 #endif
101
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602
151
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603 #else // CYGDBG_HAL_DIAG_TO_DEBUG_CHAN
103
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604
151
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605 // Use an actual (raw) IO channel
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606 CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL);
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607
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608 #endif // CYGDBG_HAL_DIAG_TO_DEBUG_CHAN
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609
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610 #endif // CYGSEM_HAL_VIRTUAL_VECTOR_INHERIT_CONSOLE
101
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611 }
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612
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613 void
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614 hal_if_diag_write_char(char c)
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615 {
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616 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_CONSOLE_PROCS();
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617
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618 if (__chan)
107
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619 CYGACC_COMM_IF_PUTC(*__chan, c);
101
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620 else {
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621 __chan = CYGACC_CALL_IF_DEBUG_PROCS();
151
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622
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623 // FIXME: What should be done if assertions are not enabled?
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624 // This is a bad bad situation - we have no means for diag
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625 // output; we want to hit a breakpoint to alert the developer
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626 // or something like that.
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627 CYG_ASSERT(__chan, "No valid channel set");
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628
107
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629 CYGACC_COMM_IF_PUTC(*__chan, c);
101
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630 }
105
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631
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632 // Check interrupt flag
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633 if (CYGACC_CALL_IF_CONSOLE_INTERRUPT_FLAG()) {
136
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634 CYGACC_CALL_IF_CONSOLE_INTERRUPT_FLAG_SET(0);
105
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635 cyg_hal_user_break(0);
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636 }
101
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637 }
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638
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639 void
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640 hal_if_diag_read_char(char *c)
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641 {
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642 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_CONSOLE_PROCS();
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643
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644 if (__chan)
107
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645 *c = CYGACC_COMM_IF_GETC(*__chan);
101
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646 else {
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647 __chan = CYGACC_CALL_IF_DEBUG_PROCS();
151
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648
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649 // FIXME: What should be done if assertions are not enabled?
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650 // This is a bad bad situation - we have no means for diag
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651 // output; we want to hit a breakpoint to alert the developer
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652 // or something like that.
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653 CYG_ASSERT(__chan, "No valid channel set");
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654
107
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655 *c = CYGACC_COMM_IF_GETC(*__chan);
101
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656 }
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657 }
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658 #endif // CYGSEM_HAL_VIRTUAL_VECTOR_DIAG
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659
105
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660 //=============================================================================
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661 // CtrlC support
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662 //=============================================================================
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663
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664 #if defined(CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT) \
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665 || defined(CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT)
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666
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667 struct Hal_SavedRegisters *hal_saved_interrupt_state;
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668
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669 void
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670 hal_ctrlc_isr_init(void)
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671 {
110
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672 // A ROM monitor never enables the interrupt itself. This is left
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673 // to the (RAM) application.
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674 #ifndef CYGSEM_HAL_ROM_MONITOR
105
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675 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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676
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677 #if 1 // Prevents crash on older stubs
151
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678 int v_m;
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679 // Allow only ctrl-c interrupt enabling when version in table is
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680 // below legal max and above the necessary service, and _not_
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681 // the value we set it to below.
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682 v_m = CYGACC_CALL_IF_VERSION() & CYGNUM_CALL_IF_TABLE_VERSION_CALL_MASK;
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683 if (v_m >= CYGNUM_CALL_IF_TABLE_VERSION_CALL_MAX
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684 || v_m < CYGNUM_CALL_IF_SET_DEBUG_COMM
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685 || v_m == CYGNUM_CALL_IF_TABLE_VERSION_CALL_HACK)
105
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686 return;
110
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687
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688 // Now trash that value - otherwise downloading an image with
151
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689 // builtin stubs on a board with older stubs (which will cause the
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690 // version to be set to VERSION_CALL) may cause all subsequent
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diff changeset
691 // runs to (wrongly) fall through to the below code. If there is
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diff changeset
692 // a new stub on the board, it will reinitialize the version field
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diff changeset
693 // on reset. Yes, this is a gross hack!
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diff changeset
694 CYGACC_CALL_IF_VERSION_SET(CYGNUM_CALL_IF_TABLE_VERSION_CALL_HACK);
105
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diff changeset
695 #endif
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diff changeset
696
151
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diff changeset
697 // We can only enable interrupts on a valid debug channel.
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698 if (__chan)
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diff changeset
699 CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_IRQ_ENABLE);
110
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diff changeset
700 #endif
105
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diff changeset
701 }
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diff changeset
702
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diff changeset
703 cyg_uint32
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diff changeset
704 hal_ctrlc_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data)
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705 {
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diff changeset
706 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();
151
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diff changeset
707 int isr_ret = 0, ctrlc = 0;
105
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708
151
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diff changeset
709 if (__chan) {
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diff changeset
710 isr_ret = CYGACC_COMM_IF_DBG_ISR(*__chan, &ctrlc, vector, data);
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diff changeset
711 if (ctrlc)
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712 cyg_hal_user_break( (CYG_ADDRWORD *)hal_saved_interrupt_state );
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713 }
105
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diff changeset
714 return isr_ret;
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diff changeset
715 }
119
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diff changeset
716
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diff changeset
717 cyg_bool
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diff changeset
718 hal_ctrlc_check(CYG_ADDRWORD vector, CYG_ADDRWORD data)
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diff changeset
719 {
151
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diff changeset
720 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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diff changeset
721 int gdb_vector = vector-1;
119
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diff changeset
722 int isr_ret, ctrlc = 0;
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723
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diff changeset
724 // This check only to avoid crash on older stubs in case of unhandled
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725 // interrupts. It is a bit messy, but required in a transition period.
151
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diff changeset
726 if (__chan &&
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diff changeset
727 (CYGNUM_CALL_IF_TABLE_VERSION_CALL_HACK ==
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728 (CYGACC_CALL_IF_VERSION() & CYGNUM_CALL_IF_TABLE_VERSION_CALL_MASK))){
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diff changeset
729 gdb_vector = CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_DBG_ISR_VECTOR);
119
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730 }
145
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diff changeset
731 if (vector == gdb_vector) {
151
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diff changeset
732 isr_ret = CYGACC_COMM_IF_DBG_ISR(*__chan, &ctrlc, vector, data);
119
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diff changeset
733 if (ctrlc)
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diff changeset
734 cyg_hal_user_break( (CYG_ADDRWORD *)hal_saved_interrupt_state );
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735 return true;
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diff changeset
736 }
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737 return false;
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738 }
105
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diff changeset
739 #endif // CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT || CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT
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740
101
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741 //--------------------------------------------------------------------------
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742 // Init function. It should be called from the platform initialization code.
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743 // For monitor configurations it will initialize the calling interface table,
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744 // for client configurations it will patch the existing table as per
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diff changeset
745 // configuration.
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diff changeset
746 void
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747 hal_if_init(void)
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748 {
151
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diff changeset
749 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_INIT_WHOLE_TABLE
101
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750 {
151
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751 int i;
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752
101
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753 // Initialize tables with the NOP service.
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754 // This should only be done for service routine entries - data
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755 // pointers should be NULLed.
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756 for (i = 0; i < CYGNUM_CALL_IF_TABLE_SIZE; i++)
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757 hal_virtual_vector_table[i] = (CYG_ADDRWORD) &nop_service;
151
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758
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759 // Version number
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760 CYGACC_CALL_IF_VERSION_SET(CYGNUM_CALL_IF_TABLE_VERSION_CALL
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761 |(CYGNUM_CALL_IF_TABLE_VERSION_COMM<<CYGNUM_CALL_IF_TABLE_VERSION_COMM_shift));
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762 }
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763 #endif
101
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764
151
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765 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_ICTRL
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766 // ICTRL and EXC tables - I assume these to be the equivalents of
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767 // ISR and VSR tables.
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768 CYGACC_CALL_IF_ICTRL_TABLE_SET(hal_interrupt_handlers);
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769 CYGACC_CALL_IF_EXC_TABLE_SET(hal_vsr_table);
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770 #endif
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771
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772 // Miscellaneous services with wrappers in this file.
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773 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_RESET
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774 CYGACC_CALL_IF_RESET_SET(reset);
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775 CYGACC_CALL_IF_KILL_VECTOR_SET(kill_by_reset);
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776 #endif
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777 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_DELAY_US
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778 CYGACC_CALL_IF_DELAY_US_SET(delay_us);
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779 #endif
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780
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781 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_CACHE
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782 // Cache functions
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783 CYGACC_CALL_IF_FLUSH_ICACHE_SET(flush_icache);
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784 CYGACC_CALL_IF_FLUSH_DCACHE_SET(flush_dcache);
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785 #endif
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786
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787 // Data entries not currently supported in eCos
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788 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_DATA
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789 CYGACC_CALL_IF_CPU_DATA_SET(0);
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790 CYGACC_CALL_IF_BOARD_DATA_SET(0);
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diff changeset
791 CYGACC_CALL_IF_DBG_DATA_SET(0);
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diff changeset
792 #endif
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793
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794 // Comm controls
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diff changeset
795 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_COMMS
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796 {
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diff changeset
797 int i, j;
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798
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799 // Clear out tables with safe dummy function.
112
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diff changeset
800 for (j = 0; j < CYGNUM_HAL_VIRTUAL_VECTOR_NUM_CHANNELS+1; j++)
101
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801 for (i = 0; i < CYGNUM_COMM_IF_TABLE_SIZE; i++)
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802 comm_channels[j][i] = (CYG_ADDRWORD) &nop_service;
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803
151
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804 // Set accessor functions
101
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805 CYGACC_CALL_IF_SET_DEBUG_COMM_SET(set_debug_comm);
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806 CYGACC_CALL_IF_SET_CONSOLE_COMM_SET(set_console_comm);
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807
151
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808 // Initialize console/debug procs. Note that these _must_
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809 // be set to empty before the comms init call.
105
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810 set_debug_comm(CYGNUM_CALL_IF_SET_COMM_ID_EMPTY);
103
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diff changeset
811 set_console_comm(CYGNUM_CALL_IF_SET_COMM_ID_EMPTY);
101
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812
151
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813 // Initialize channels. This used to be done in
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814 // hal_diag_init() and the stub initHardware() functions, but
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815 // it makes more sense to have here.
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816 cyg_hal_plf_comms_init();
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diff changeset
817
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diff changeset
818 // Always set the debug channel. If stubs are included, it is
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819 // necessary. If no stubs are included it does not hurt and is
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820 // likely to be required by the hal_if_diag_init code anyway
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diff changeset
821 // as it may rely on it if using a mangler.
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822 set_debug_comm(CYGNUM_HAL_VIRTUAL_VECTOR_DEBUG_CHANNEL);
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823 // Set console channel to a safe default. hal_if_diag_init
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824 // will override with console channel or mangler if necessary.
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825 set_console_comm(CYGNUM_HAL_VIRTUAL_VECTOR_DEBUG_CHANNEL);
101
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826 }
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827
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828 // Reset console interrupt flag.
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829 CYGACC_CALL_IF_CONSOLE_INTERRUPT_FLAG_SET(0);
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830 #endif
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831
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832 // Set up services provided by clients
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833 #if defined(CYGFUN_HAL_COMMON_KERNEL_SUPPORT) && \
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834 ( defined(CYGSEM_HAL_USE_ROM_MONITOR_GDB_stubs) \
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835 || defined(CYGSEM_HAL_USE_ROM_MONITOR_CygMon))
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836
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837 patch_dbg_syscalls( (void *)(hal_virtual_vector_table) );
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838 #endif
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839
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840 // Init client services
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841 #if !defined(CYGPKG_KERNEL) && defined(CYGDBG_HAL_DEBUG_GDB_THREAD_SUPPORT)
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842 // Only include this code if we do not have a kernel. Otherwise
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843 // the kernel supplies the functionality for the app we are linked
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844 // with.
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845
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846 // Prepare for application installation of thread info function in
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847 // vector table.
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848 init_thread_syscall( (void *)&hal_virtual_vector_table[CYGNUM_CALL_IF_DBG_SYSCALL] );
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849 #endif
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850
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851 // Finally, install async breakpoint handler if it is configured in.
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852 // FIXME: this should probably check for STUBS instead (but code is
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853 // conditional on BREAK for now)
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854 #if defined(CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT)
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855 // Install async breakpoint handler into vector table.
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856 CYGACC_CALL_IF_INSTALL_BPT_FN_SET(&cyg_hal_gdb_interrupt);
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857 #endif
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858 }