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annotate packages/hal/common/current/src/hal_if.c @ 1076:ff838098079a

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* src/hal_if.c (delay_us): The first test against CYGNUM_KERNEL_COUNTERS_RTC_PERIOD is now against the period divided by two. By the time we get to this test we know that usecs can never be > usec_per_period/2 so we can double the range of period values that we can handle without overflow and use the more efficient approximation. The second test is not changed since we cannot make the same assumptions about the elapsed count.
author nickg
date Wed, 25 Jun 2003 17:40:41 +0000
parents 965fc7fbe135
children 0e41ddaf36fe
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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 //####ECOSGPLCOPYRIGHTBEGIN####
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9 // -------------------------------------------
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10 // This file is part of eCos, the Embedded Configurable Operating System.
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11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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12 // Copyright (C) 2002 Gary Thomas
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13 // Copyright (C) 2003 Nick Garnett <nickg@calivar.com>
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14 // Copyright (C) 2003 Jonathan Larmour <jlarmour@eCosCentric.com>
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15 //
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16 // eCos is free software; you can redistribute it and/or modify it under
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17 // the terms of the GNU General Public License as published by the Free
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18 // Software Foundation; either version 2 or (at your option) any later version.
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19 //
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20 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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21 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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22 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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23 // for more details.
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24 //
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25 // You should have received a copy of the GNU General Public License along
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26 // with eCos; if not, write to the Free Software Foundation, Inc.,
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27 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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28 //
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29 // As a special exception, if other files instantiate templates or use macros
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30 // or inline functions from this file, or you compile this file and link it
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31 // with other works to produce a work based on this file, this file does not
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32 // by itself cause the resulting work to be covered by the GNU General Public
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33 // License. However the source code for this file must still be made available
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34 // in accordance with section (3) of the GNU General Public License.
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35 //
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36 // This exception does not invalidate any other reasons why a work based on
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37 // this file might be covered by the GNU General Public License.
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38 //
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39 // Alternative licenses for eCos may be arranged by contacting the copyright
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40 // holders.
208
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41 // -------------------------------------------
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42 //####ECOSGPLCOPYRIGHTEND####
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43 //=============================================================================
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44 //#####DESCRIPTIONBEGIN####
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45 //
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46 // Author(s): jskov
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47 // Contributors:jskov, woehler
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48 // Date: 2000-06-07
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49 //
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50 //####DESCRIPTIONEND####
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51 //
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52 //=============================================================================
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53
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54 #include <pkgconf/hal.h>
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55
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56 #ifdef CYGPKG_KERNEL
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57 # include <pkgconf/kernel.h>
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58 #endif
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59
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60 #include <cyg/infra/cyg_ass.h> // assertions
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61
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62 #include <cyg/hal/hal_arch.h> // set/restore GP
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63
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64 #include <cyg/hal/hal_io.h> // IO macros
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65 #include <cyg/hal/hal_if.h> // our interface
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66
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67 #include <cyg/hal/hal_diag.h> // Diag IO
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68 #include <cyg/hal/hal_misc.h> // User break
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70 #include <cyg/hal/hal_stub.h> // stub functionality
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71
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72 #include <cyg/hal/hal_intr.h> // hal_vsr_table and others
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73
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74 #ifdef CYGPKG_REDBOOT
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75 #include <pkgconf/redboot.h>
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76 #ifdef CYGSEM_REDBOOT_FLASH_CONFIG
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77 #include <redboot.h>
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78 #include <flash_config.h>
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79 #endif
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80 #ifdef CYGOPT_REDBOOT_FIS
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81 #include <fis.h>
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82 #endif
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83 #endif
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84
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85 //--------------------------------------------------------------------------
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86
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87 externC void patch_dbg_syscalls(void * vector);
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88 externC void init_thread_syscall(void * vector);
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89
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90 //--------------------------------------------------------------------------
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91 // Implementations and function wrappers for monitor services
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92
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93 // flash config state queries
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94 #ifdef CYGSEM_REDBOOT_FLASH_CONFIG
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95
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96 static __call_if_flash_cfg_op_fn_t flash_config_op;
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97
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98 static cyg_bool
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99 flash_config_op( int op, char * key, void *val, int type)
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100 {
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101 cyg_bool res = false;
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102
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103 CYGARC_HAL_SAVE_GP();
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104
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105 switch ( op ) {
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106 case CYGNUM_CALL_IF_FLASH_CFG_GET:
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107 res = flash_get_config( key, val, type );
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108 break;
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109 default:
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110 // nothing else supported yet - though it is expected that "set"
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111 // will fit the same set of arguments, potentially.
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112 break;
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113 }
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114
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115 CYGARC_HAL_RESTORE_GP();
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116 return res;
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117 }
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118 #endif
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119
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120 #ifdef CYGOPT_REDBOOT_FIS
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121
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122 static __call_if_flash_fis_op_fn_t flash_fis_op;
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123
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124 static cyg_bool
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125 flash_fis_op( int op, char *name, void *val)
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126 {
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127 cyg_bool res = false;
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128 struct fis_image_desc *fis;
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129 int num;
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130
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131 CYGARC_HAL_SAVE_GP();
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132 fis = fis_lookup(name, &num);
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133 if(fis != NULL)
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134 {
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135 switch ( op ) {
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136 case CYGNUM_CALL_IF_FLASH_FIS_GET_FLASH_BASE:
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137 *(CYG_ADDRESS *)val = fis->flash_base;
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138 res = true;
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139 break;
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140 case CYGNUM_CALL_IF_FLASH_FIS_GET_SIZE:
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141 *(unsigned long *)val = fis->size;
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142 res = true;
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143 break;
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144 default:
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145 break;
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146 }
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147 }
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148 CYGARC_HAL_RESTORE_GP();
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149 return res;
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150 }
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151 #endif
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152
151
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153 //----------------------------
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154 // Delay uS
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155 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_DELAY_US
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156
156
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157 static __call_if_delay_us_t delay_us;
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158
105
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159 static void
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160 delay_us(cyg_int32 usecs)
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161 {
143
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162 CYGARC_HAL_SAVE_GP();
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163 #ifdef CYGPKG_KERNEL
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164 {
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165 cyg_int32 start, elapsed, elapsed_usec;
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166 cyg_int32 slice;
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167 cyg_int32 usec_per_period = CYGNUM_HAL_RTC_NUMERATOR/CYGNUM_HAL_RTC_DENOMINATOR/1000;
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168 cyg_int32 ticks_per_usec = CYGNUM_KERNEL_COUNTERS_RTC_PERIOD/usec_per_period;
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169
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170 do {
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171 // Spin in slices of 1/2 the RTC period. Allows interrupts
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172 // time to run without messing up the algorithm. If we
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173 // spun for 1 period (or more) of the RTC, there would also
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174 // be problems figuring out when the timer wrapped. We
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175 // may lose a tick or two for each cycle but it shouldn't
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176 // matter much.
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177
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178 // The tests against CYGNUM_KERNEL_COUNTERS_RTC_PERIOD
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179 // check for a value that would cause a 32 bit signed
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180 // multiply to overflow. But this also implies that just
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181 // multiplying by ticks_per_usec will yield a good
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182 // approximation. Otherwise we need to do the full
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183 // multiply+divide to get sufficient accuracy. Note that
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184 // this test is actually constant, so the compiler will
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185 // eliminate it and only compile the branch that is
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186 // selected.
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187
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188 if( usecs > usec_per_period/2 )
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189 slice = CYGNUM_KERNEL_COUNTERS_RTC_PERIOD/2;
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190 else if( CYGNUM_KERNEL_COUNTERS_RTC_PERIOD/2 >= 0x7FFFFFFF/usec_per_period )
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191 slice = usecs * ticks_per_usec;
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192 else
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193 {
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194 slice = usecs*CYGNUM_KERNEL_COUNTERS_RTC_PERIOD;
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195 slice /= usec_per_period;
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196 }
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197
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198 HAL_CLOCK_READ(&start);
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199 do {
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200 HAL_CLOCK_READ(&elapsed);
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201 elapsed = (elapsed - start); // counts up!
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202 if (elapsed < 0)
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203 elapsed += CYGNUM_KERNEL_COUNTERS_RTC_PERIOD;
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204 } while (elapsed < slice);
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205
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206 // Adjust by elapsed, not slice, since an interrupt may
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207 // have been stalling us for some time.
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208
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209 if( CYGNUM_KERNEL_COUNTERS_RTC_PERIOD >= 0x7FFFFFFF/usec_per_period )
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210 elapsed_usec = elapsed / ticks_per_usec;
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211 else
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212 {
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213 elapsed_usec = elapsed * usec_per_period;
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214 elapsed_usec = elapsed_usec / CYGNUM_KERNEL_COUNTERS_RTC_PERIOD;
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215 }
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216
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217 // It is possible for elapsed_usec to end up zero in some
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218 // circumstances and we could end up looping indefinitely.
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219 // Avoid that by ensuring that we always decrement usec by
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220 // at least 1 each time.
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221
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222 usecs -= elapsed_usec ? elapsed_usec : 1;
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223
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224 } while (usecs > 0);
143
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225 }
151
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226 #else // CYGPKG_KERNEL
136
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227 #ifdef HAL_DELAY_US
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228 // Use a HAL feature if defined
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229 HAL_DELAY_US(usecs);
136
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230 #else
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231 // If no accurate delay mechanism, just spin for a while. Having
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232 // an inaccurate delay is much better than no delay at all. The
143
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233 // count of 10 should mean the loop takes something resembling
136
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234 // 1us on most CPUs running between 30-100MHz [depends on how many
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235 // instructions this compiles to, how many dispatch units can be
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236 // used for the simple loop, actual CPU frequency, etc]
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237 while (usecs-- > 0) {
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238 int i;
143
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239 for (i = 0; i < 10; i++);
136
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240 }
151
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241 #endif // HAL_DELAY_US
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242 #endif // CYGPKG_KERNEL
143
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243 CYGARC_HAL_RESTORE_GP();
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244 }
151
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245 #endif // CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_DELAY_US
101
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246
151
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247 // Reset functions
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248 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_RESET
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249
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250 static __call_if_reset_t reset;
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251
101
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252 static void
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253 reset(void)
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254 {
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255 CYGARC_HAL_SAVE_GP();
101
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256 // With luck, the platform defines some magic that will cause a hardware
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257 // reset.
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258 #ifdef HAL_PLATFORM_RESET
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259 HAL_PLATFORM_RESET();
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260 #endif
101
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261
151
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262 #ifdef HAL_PLATFORM_RESET_ENTRY
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263 // If that's not the case (above is an empty statement) there may
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264 // be defined an address we can jump to - and effectively
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265 // reinitialize the system. Not quite as good as a reset, but it
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266 // is often enough.
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267 goto *HAL_PLATFORM_RESET_ENTRY;
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268
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269 #else
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270 #error " no RESET_ENTRY"
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271 #endif
1065
965fc7fbe135 * src/hal_if.c (hal_if_init): Remove kill_by_reset.
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272 CYG_FAIL("Reset failed");
105
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273 CYGARC_HAL_RESTORE_GP();
101
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274 }
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275
151
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276 #endif
101
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277
151
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278 //------------------------------------
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279 // NOP service
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280 #if defined(CYGSEM_HAL_VIRTUAL_VECTOR_INIT_WHOLE_TABLE) || \
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281 defined(CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_COMMS)
101
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282 static int
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283 nop_service(void)
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284 {
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285 // This is the default service. It always returns false (0), and
151
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286 // _does not_ trigger any assertions. Clients must either cope
101
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287 // with the service failure or assert.
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288 return 0;
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289 }
151
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290 #endif
101
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291
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292 //----------------------------------
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293 // Comm controls
151
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294 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_COMMS
101
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295
112
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296 #ifdef CYGNUM_HAL_VIRTUAL_VECTOR_AUX_CHANNELS
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297 #define CYGNUM_HAL_VIRTUAL_VECTOR_NUM_CHANNELS \
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298 (CYGNUM_HAL_VIRTUAL_VECTOR_COMM_CHANNELS+CYGNUM_HAL_VIRTUAL_VECTOR_AUX_CHANNELS)
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299 #else
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300 #define CYGNUM_HAL_VIRTUAL_VECTOR_NUM_CHANNELS \
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301 CYGNUM_HAL_VIRTUAL_VECTOR_COMM_CHANNELS
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302 #endif
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303
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304 static hal_virtual_comm_table_t comm_channels[CYGNUM_HAL_VIRTUAL_VECTOR_NUM_CHANNELS+1];
103
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305
101
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306 static int
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307 set_debug_comm(int __comm_id)
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308 {
103
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309 static int __selected_id = CYGNUM_CALL_IF_SET_COMM_ID_EMPTY;
105
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310 hal_virtual_comm_table_t* __chan;
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311 int interrupt_state = 0;
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312 int res = 1, update = 0;
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313 CYGARC_HAL_SAVE_GP();
101
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314
103
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315 CYG_ASSERT(__comm_id >= CYGNUM_CALL_IF_SET_COMM_ID_MANGLER
112
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316 && __comm_id < CYGNUM_HAL_VIRTUAL_VECTOR_NUM_CHANNELS,
101
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317 "Invalid channel");
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318
103
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319 switch (__comm_id) {
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320 case CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT:
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321 if (__selected_id > 0)
105
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322 res = __selected_id-1;
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323 else if (__selected_id == 0)
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324 res = CYGNUM_CALL_IF_SET_COMM_ID_MANGLER;
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325 else
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326 res = __selected_id;
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327 break;
101
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328
103
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329 case CYGNUM_CALL_IF_SET_COMM_ID_EMPTY:
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330 CYGACC_CALL_IF_DEBUG_PROCS_SET(0);
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331 __selected_id = __comm_id;
105
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332 break;
103
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333
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334 case CYGNUM_CALL_IF_SET_COMM_ID_MANGLER:
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335 __comm_id = 0;
105
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336 update = 1;
103
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337 break;
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338
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339 default:
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340 __comm_id++; // skip mangler entry
105
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341 update = 1;
103
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342 break;
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343 }
105
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344
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345 if (update) {
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346 // Find the interrupt state of the channel.
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347 __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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348 if (__chan)
107
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349 interrupt_state = CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_IRQ_DISABLE);
105
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350
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351 __selected_id = __comm_id;
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352 CYGACC_CALL_IF_DEBUG_PROCS_SET(comm_channels[__comm_id]);
101
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353
105
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354 // Set interrupt state on the new channel.
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355 __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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356 if (interrupt_state)
107
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357 CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_IRQ_ENABLE);
105
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358 else
107
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359 CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_IRQ_DISABLE);
105
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360 }
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361
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362 CYGARC_HAL_RESTORE_GP();
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363 return res;
101
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364 }
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365
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366 static int
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367 set_console_comm(int __comm_id)
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368 {
103
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369 static int __selected_id = CYGNUM_CALL_IF_SET_COMM_ID_EMPTY;
105
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370 int res = 1, update = 0;
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371 CYGARC_HAL_SAVE_GP();
101
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372
103
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373 CYG_ASSERT(__comm_id >= CYGNUM_CALL_IF_SET_COMM_ID_MANGLER
112
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374 && __comm_id < CYGNUM_HAL_VIRTUAL_VECTOR_NUM_CHANNELS,
101
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375 "Invalid channel");
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376
103
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377 switch (__comm_id) {
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378 case CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT:
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379 if (__selected_id > 0)
105
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380 res = __selected_id-1;
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381 else if (__selected_id == 0)
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382 res = CYGNUM_CALL_IF_SET_COMM_ID_MANGLER;
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383 else
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384 res = __selected_id;
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385 break;
101
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386
103
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387 case CYGNUM_CALL_IF_SET_COMM_ID_EMPTY:
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388 CYGACC_CALL_IF_CONSOLE_PROCS_SET(0);
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389 __selected_id = __comm_id;
105
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390 break;
103
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391
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392 case CYGNUM_CALL_IF_SET_COMM_ID_MANGLER:
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393 __comm_id = 0;
105
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394 update = 1;
103
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395 break;
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396
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397 default:
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398 __comm_id++; // skip mangler entry
105
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399 update = 1;
103
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400 break;
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401 }
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402
105
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403 if (update) {
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404 __selected_id = __comm_id;
101
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405
105
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406 CYGACC_CALL_IF_CONSOLE_PROCS_SET(comm_channels[__comm_id]);
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407 }
101
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408
105
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409 CYGARC_HAL_RESTORE_GP();
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410 return res;
101
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411 }
151
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412 #endif
101
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413
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414 //----------------------------------
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415 // Cache functions
151
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416 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_CACHE
101
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417
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418 static void
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419 flush_icache(void *__p, int __nbytes)
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420 {
105
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421 CYGARC_HAL_SAVE_GP();
101
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422 #ifdef HAL_ICACHE_FLUSH
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423 HAL_ICACHE_FLUSH( __p , __nbytes );
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424 #elif defined(HAL_ICACHE_INVALIDATE)
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425 HAL_ICACHE_INVALIDATE();
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426 #endif
105
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427 CYGARC_HAL_RESTORE_GP();
101
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428 }
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429
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430 static void
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431 flush_dcache(void *__p, int __nbytes)
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432 {
105
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433 CYGARC_HAL_SAVE_GP();
101
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434 #ifdef HAL_DCACHE_FLUSH
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435 HAL_DCACHE_FLUSH( __p , __nbytes );
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436 #elif defined(HAL_DCACHE_INVALIDATE)
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437 HAL_DCACHE_INVALIDATE();
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438 #endif
105
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439 CYGARC_HAL_RESTORE_GP();
101
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440 }
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441 #endif
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442
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443 #if defined(CYGSEM_HAL_VIRTUAL_VECTOR_DIAG)
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444 //-----------------------------------------------------------------------------
151
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445 // GDB console output mangler (O-packetizer)
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446 // COMMS init function at end.
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447
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448 // This gets called via the virtual vector console comms entry and
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449 // handles O-packetization. The debug comms entries are used for the
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450 // actual device IO.
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451 static cyg_uint8
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452 cyg_hal_diag_mangler_gdb_getc(void* __ch_data)
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453 {
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454 cyg_uint8 __ch;
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455 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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456 CYGARC_HAL_SAVE_GP();
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457
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458 __ch = CYGACC_COMM_IF_GETC(*__chan);
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459
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460 CYGARC_HAL_RESTORE_GP();
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461
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462 return __ch;
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463 }
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464
208
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465 static char __mangler_line[100];
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466 static int __mangler_pos = 0;
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467
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468 static void
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469 cyg_hal_diag_mangler_gdb_flush(void* __ch_data)
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470 {
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471 CYG_INTERRUPT_STATE old;
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472 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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473
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474 // Nothing to do if mangler buffer is empty.
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475 if (__mangler_pos == 0)
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476 return;
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477
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478 // Disable interrupts. This prevents GDB trying to interrupt us
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479 // while we are in the middle of sending a packet. The serial
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480 // receive interrupt will be seen when we re-enable interrupts
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481 // later.
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482 #if defined(CYG_HAL_STARTUP_ROM) \
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483 || !defined(CYG_HAL_GDB_ENTER_CRITICAL_IO_REGION)
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484 HAL_DISABLE_INTERRUPTS(old);
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485 #else
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486 CYG_HAL_GDB_ENTER_CRITICAL_IO_REGION(old);
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487 #endif
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488
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489 #if CYGNUM_HAL_DEBUG_GDB_PROTOCOL_RETRIES != 0
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490 // Only wait 500ms for data to arrive - avoid "stuck" connections
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491 CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_SET_TIMEOUT, CYGNUM_HAL_DEBUG_GDB_PROTOCOL_TIMEOUT);
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492 #endif
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493
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494 while(1)
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495 {
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496 static const char hex[] = "0123456789ABCDEF";
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497 cyg_uint8 csum = 0, c1;
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498 int i;
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499
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500 CYGACC_COMM_IF_PUTC(*__chan, '$');
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501 CYGACC_COMM_IF_PUTC(*__chan, 'O');
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502 csum += 'O';
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503 for( i = 0; i < __mangler_pos; i++ )
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504 {
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505 char ch = __mangler_line[i];
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506 char h = hex[(ch>>4)&0xF];
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507 char l = hex[ch&0xF];
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508 CYGACC_COMM_IF_PUTC(*__chan, h);
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509 CYGACC_COMM_IF_PUTC(*__chan, l);
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510 csum += h;
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511 csum += l;
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512 }
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513 CYGACC_COMM_IF_PUTC(*__chan, '#');
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514 CYGACC_COMM_IF_PUTC(*__chan, hex[(csum>>4)&0xF]);
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515 CYGACC_COMM_IF_PUTC(*__chan, hex[csum&0xF]);
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516
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517 nak:
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518 #if CYGNUM_HAL_DEBUG_GDB_PROTOCOL_RETRIES != 0
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519 if (CYGACC_COMM_IF_GETC_TIMEOUT(*__chan, &c1) == 0) {
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520 c1 = '-';
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521 if (tries && (--tries == 0)) c1 = '+';
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522 }
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523 #else
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524 c1 = CYGACC_COMM_IF_GETC(*__chan);
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525 #endif
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526
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527 if( c1 == '+' ) break;
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528
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529 if( cyg_hal_is_break( &c1 , 1 ) ) {
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530 // Caller's responsibility to react on this.
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531 CYGACC_CALL_IF_CONSOLE_INTERRUPT_FLAG_SET(1);
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532 break;
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533 }
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534 if( c1 != '-' ) goto nak;
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535 }
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536
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537 __mangler_pos = 0;
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538 // And re-enable interrupts
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539 #if defined(CYG_HAL_STARTUP_ROM) \
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540 || !defined(CYG_HAL_GDB_ENTER_CRITICAL_IO_REGION)
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541 HAL_RESTORE_INTERRUPTS(old);
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542 #else
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543 CYG_HAL_GDB_LEAVE_CRITICAL_IO_REGION(old);
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544 #endif
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545 }
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546
151
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547 static void
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548 cyg_hal_diag_mangler_gdb_putc(void* __ch_data, cyg_uint8 c)
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549 {
191
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550 #if CYGNUM_HAL_DEBUG_GDB_PROTOCOL_RETRIES != 0
179
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551 int tries = CYGNUM_HAL_DEBUG_GDB_PROTOCOL_RETRIES;
191
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552 #endif
151
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553
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554 // No need to send CRs
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555 if( c == '\r' ) return;
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556
161
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557 CYGARC_HAL_SAVE_GP();
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558
208
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559 __mangler_line[__mangler_pos++] = c;
179
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560
208
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561 if( c == '\n' || __mangler_pos == sizeof(__mangler_line) )
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562 cyg_hal_diag_mangler_gdb_flush(__ch_data);
151
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563
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564 CYGARC_HAL_RESTORE_GP();
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565 }
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566
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567 static void
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568 cyg_hal_diag_mangler_gdb_write(void* __ch_data,
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569 const cyg_uint8* __buf, cyg_uint32 __len)
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570 {
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571 CYGARC_HAL_SAVE_GP();
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572
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573 while(__len-- > 0)
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574 cyg_hal_diag_mangler_gdb_putc(__ch_data, *__buf++);
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575
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576 CYGARC_HAL_RESTORE_GP();
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577 }
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578
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579 static void
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580 cyg_hal_diag_mangler_gdb_read(void* __ch_data,
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581 cyg_uint8* __buf, cyg_uint32 __len)
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582 {
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583 CYGARC_HAL_SAVE_GP();
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584
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585 while(__len-- > 0)
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586 *__buf++ = cyg_hal_diag_mangler_gdb_getc(__ch_data);
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587
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588 CYGARC_HAL_RESTORE_GP();
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589 }
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590
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591 static int
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592 cyg_hal_diag_mangler_gdb_control(void *__ch_data,
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593 __comm_control_cmd_t __func, ...)
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594 {
208
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595 CYGARC_HAL_SAVE_GP();
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596
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597 if (__func == __COMMCTL_FLUSH_OUTPUT)
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598 cyg_hal_diag_mangler_gdb_flush(__ch_data);
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599
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600 CYGARC_HAL_RESTORE_GP();
151
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601 return 0;
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602 }
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603
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604 // This is the COMMS init function. It gets called both by the stubs
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605 // and diag init code to initialize the COMMS mangler channel table -
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606 // that's all. The callers have to decide whether to actually use this
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607 // channel.
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608 void
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609 cyg_hal_diag_mangler_gdb_init(void)
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610 {
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611 hal_virtual_comm_table_t* comm;
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612 int cur = CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT);
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613
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614 // Initialize mangler procs
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615 CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_MANGLER);
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616 comm = CYGACC_CALL_IF_CONSOLE_PROCS();
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617 CYGACC_COMM_IF_WRITE_SET(*comm, cyg_hal_diag_mangler_gdb_write);
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618 CYGACC_COMM_IF_READ_SET(*comm, cyg_hal_diag_mangler_gdb_read);
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619 CYGACC_COMM_IF_PUTC_SET(*comm, cyg_hal_diag_mangler_gdb_putc);
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620 CYGACC_COMM_IF_GETC_SET(*comm, cyg_hal_diag_mangler_gdb_getc);
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621 CYGACC_COMM_IF_CONTROL_SET(*comm, cyg_hal_diag_mangler_gdb_control);
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622
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623 // Restore the original console channel.
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624 CYGACC_CALL_IF_SET_CONSOLE_COMM(cur);
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625 }
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626
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627 //-----------------------------------------------------------------------------
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628 // Null console output mangler
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629 // COMMS init function at end.
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630
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631 // This gets called via the virtual vector console comms entry and
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632 // just forwards IO to the debug comms entries.
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633 // This differs from setting the console channel to the same as the
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634 // debug channel in that console output will go to the debug channel
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635 // even if the debug channel is changed.
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636 static cyg_uint8
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637 cyg_hal_diag_mangler_null_getc(void* __ch_data)
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638 {
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639 cyg_uint8 __ch;
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640 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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641 CYGARC_HAL_SAVE_GP();
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642
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643 __ch = CYGACC_COMM_IF_GETC(*__chan);
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644
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645 CYGARC_HAL_RESTORE_GP();
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646
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647 return __ch;
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648 }
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649
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650
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651 static void
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652 cyg_hal_diag_mangler_null_putc(void* __ch_data, cyg_uint8 c)
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653 {
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654 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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655
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656 CYGARC_HAL_SAVE_GP();
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657
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658 CYGACC_COMM_IF_PUTC(*__chan, c);
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659
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660 CYGARC_HAL_RESTORE_GP();
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661 }
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662
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663 static void
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664 cyg_hal_diag_mangler_null_write(void* __ch_data,
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665 const cyg_uint8* __buf, cyg_uint32 __len)
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666 {
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667 CYGARC_HAL_SAVE_GP();
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668
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669 while(__len-- > 0)
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670 cyg_hal_diag_mangler_null_putc(__ch_data, *__buf++);
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671
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672 CYGARC_HAL_RESTORE_GP();
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673 }
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674
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675 static void
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676 cyg_hal_diag_mangler_null_read(void* __ch_data,
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677 cyg_uint8* __buf, cyg_uint32 __len)
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678 {
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679 CYGARC_HAL_SAVE_GP();
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680
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681 while(__len-- > 0)
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682 *__buf++ = cyg_hal_diag_mangler_null_getc(__ch_data);
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683
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684 CYGARC_HAL_RESTORE_GP();
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685 }
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686
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diff changeset
687 static int
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diff changeset
688 cyg_hal_diag_mangler_null_control(void *__ch_data,
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diff changeset
689 __comm_control_cmd_t __func, ...)
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690 {
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diff changeset
691 // Do nothing (yet).
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diff changeset
692 return 0;
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diff changeset
693 }
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694
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diff changeset
695 // This is the COMMS init function. It gets called both by the stubs
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diff changeset
696 // and diag init code to initialize the COMMS mangler channel table -
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diff changeset
697 // that's all. The callers have to decide whether to actually use this
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diff changeset
698 // channel.
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diff changeset
699 void
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diff changeset
700 cyg_hal_diag_mangler_null_init(void)
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701 {
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diff changeset
702 hal_virtual_comm_table_t* comm;
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diff changeset
703 int cur = CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT);
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704
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diff changeset
705 // Initialize mangler procs
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diff changeset
706 CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_MANGLER);
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707 comm = CYGACC_CALL_IF_CONSOLE_PROCS();
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708 CYGACC_COMM_IF_WRITE_SET(*comm, cyg_hal_diag_mangler_null_write);
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709 CYGACC_COMM_IF_READ_SET(*comm, cyg_hal_diag_mangler_null_read);
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710 CYGACC_COMM_IF_PUTC_SET(*comm, cyg_hal_diag_mangler_null_putc);
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diff changeset
711 CYGACC_COMM_IF_GETC_SET(*comm, cyg_hal_diag_mangler_null_getc);
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diff changeset
712 CYGACC_COMM_IF_CONTROL_SET(*comm, cyg_hal_diag_mangler_null_control);
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diff changeset
713
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diff changeset
714 // Restore the original console channel.
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diff changeset
715 CYGACC_CALL_IF_SET_CONSOLE_COMM(cur);
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716 }
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717
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diff changeset
718 //-----------------------------------------------------------------------------
101
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719 // Console IO functions that adhere to the virtual vector table semantics in
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720 // order to ensure proper debug agent mangling when required.
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721 //
115
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diff changeset
722 externC void cyg_hal_plf_comms_init(void);
151
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723
105
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diff changeset
724 void
101
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725 hal_if_diag_init(void)
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726 {
156
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727 // This function may be called from various places and the code
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728 // should only run once.
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729 static cyg_uint8 called = 0;
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730 if (called) return;
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731 called = 1;
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732
151
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diff changeset
733 #ifndef CYGSEM_HAL_VIRTUAL_VECTOR_INHERIT_CONSOLE
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734
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diff changeset
735 #if defined(CYGDBG_HAL_DIAG_TO_DEBUG_CHAN)
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736 // Use the mangler channel, which in turn uses the debug channel.
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737 CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_MANGLER);
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738
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739 // Initialize the mangler channel.
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740 #if defined(CYGSEM_HAL_DIAG_MANGLER_GDB)
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741 cyg_hal_diag_mangler_gdb_init();
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742 #elif defined(CYGSEM_HAL_DIAG_MANGLER_None)
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743 cyg_hal_diag_mangler_null_init();
103
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744 #endif
101
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745
151
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746 #else // CYGDBG_HAL_DIAG_TO_DEBUG_CHAN
103
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747
151
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748 // Use an actual (raw) IO channel
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749 CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL);
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750
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751 #endif // CYGDBG_HAL_DIAG_TO_DEBUG_CHAN
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752
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753 #endif // CYGSEM_HAL_VIRTUAL_VECTOR_INHERIT_CONSOLE
101
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754 }
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755
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756 void
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757 hal_if_diag_write_char(char c)
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758 {
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759 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_CONSOLE_PROCS();
179
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760
101
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761 if (__chan)
107
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762 CYGACC_COMM_IF_PUTC(*__chan, c);
101
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763 else {
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764 __chan = CYGACC_CALL_IF_DEBUG_PROCS();
151
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765
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766 // FIXME: What should be done if assertions are not enabled?
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767 // This is a bad bad situation - we have no means for diag
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768 // output; we want to hit a breakpoint to alert the developer
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769 // or something like that.
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770 CYG_ASSERT(__chan, "No valid channel set");
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771
107
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772 CYGACC_COMM_IF_PUTC(*__chan, c);
101
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773 }
105
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774
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775 // Check interrupt flag
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776 if (CYGACC_CALL_IF_CONSOLE_INTERRUPT_FLAG()) {
136
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777 CYGACC_CALL_IF_CONSOLE_INTERRUPT_FLAG_SET(0);
105
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778 cyg_hal_user_break(0);
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779 }
101
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780 }
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781
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782 void
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783 hal_if_diag_read_char(char *c)
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784 {
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785 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_CONSOLE_PROCS();
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786
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787 if (__chan)
107
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788 *c = CYGACC_COMM_IF_GETC(*__chan);
101
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789 else {
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790 __chan = CYGACC_CALL_IF_DEBUG_PROCS();
151
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791
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792 // FIXME: What should be done if assertions are not enabled?
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793 // This is a bad bad situation - we have no means for diag
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794 // output; we want to hit a breakpoint to alert the developer
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795 // or something like that.
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796 CYG_ASSERT(__chan, "No valid channel set");
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797
107
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798 *c = CYGACC_COMM_IF_GETC(*__chan);
101
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799 }
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800 }
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801 #endif // CYGSEM_HAL_VIRTUAL_VECTOR_DIAG
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802
105
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803 //=============================================================================
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804 // CtrlC support
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805 //=============================================================================
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806
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807 #if defined(CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT) \
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808 || defined(CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT)
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809
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810 struct Hal_SavedRegisters *hal_saved_interrupt_state;
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diff changeset
811
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812 void
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813 hal_ctrlc_isr_init(void)
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814 {
110
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815 // A ROM monitor never enables the interrupt itself. This is left
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diff changeset
816 // to the (RAM) application.
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diff changeset
817 #ifndef CYGSEM_HAL_ROM_MONITOR
105
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818 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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819
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820 #if 1 // Prevents crash on older stubs
151
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diff changeset
821 int v_m;
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diff changeset
822 // Allow only ctrl-c interrupt enabling when version in table is
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diff changeset
823 // below legal max and above the necessary service, and _not_
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diff changeset
824 // the value we set it to below.
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diff changeset
825 v_m = CYGACC_CALL_IF_VERSION() & CYGNUM_CALL_IF_TABLE_VERSION_CALL_MASK;
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826 if (v_m >= CYGNUM_CALL_IF_TABLE_VERSION_CALL_MAX
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827 || v_m < CYGNUM_CALL_IF_SET_DEBUG_COMM
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828 || v_m == CYGNUM_CALL_IF_TABLE_VERSION_CALL_HACK)
105
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diff changeset
829 return;
110
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diff changeset
830
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diff changeset
831 // Now trash that value - otherwise downloading an image with
151
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diff changeset
832 // builtin stubs on a board with older stubs (which will cause the
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diff changeset
833 // version to be set to VERSION_CALL) may cause all subsequent
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diff changeset
834 // runs to (wrongly) fall through to the below code. If there is
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835 // a new stub on the board, it will reinitialize the version field
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836 // on reset. Yes, this is a gross hack!
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diff changeset
837 CYGACC_CALL_IF_VERSION_SET(CYGNUM_CALL_IF_TABLE_VERSION_CALL_HACK);
105
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838 #endif
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839
151
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diff changeset
840 // We can only enable interrupts on a valid debug channel.
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841 if (__chan)
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842 CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_IRQ_ENABLE);
110
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843 #endif
105
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844 }
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845
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846 cyg_uint32
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847 hal_ctrlc_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data)
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848 {
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849 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();
151
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850 int isr_ret = 0, ctrlc = 0;
105
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851
151
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852 if (__chan) {
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853 isr_ret = CYGACC_COMM_IF_DBG_ISR(*__chan, &ctrlc, vector, data);
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854 if (ctrlc)
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855 cyg_hal_user_break( (CYG_ADDRWORD *)hal_saved_interrupt_state );
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856 }
105
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857 return isr_ret;
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858 }
119
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859
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860 cyg_bool
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diff changeset
861 hal_ctrlc_check(CYG_ADDRWORD vector, CYG_ADDRWORD data)
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862 {
151
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diff changeset
863 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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864 int gdb_vector = vector-1;
119
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diff changeset
865 int isr_ret, ctrlc = 0;
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866
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diff changeset
867 // This check only to avoid crash on older stubs in case of unhandled
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868 // interrupts. It is a bit messy, but required in a transition period.
151
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869 if (__chan &&
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870 (CYGNUM_CALL_IF_TABLE_VERSION_CALL_HACK ==
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871 (CYGACC_CALL_IF_VERSION() & CYGNUM_CALL_IF_TABLE_VERSION_CALL_MASK))){
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872 gdb_vector = CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_DBG_ISR_VECTOR);
119
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873 }
145
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874 if (vector == gdb_vector) {
151
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diff changeset
875 isr_ret = CYGACC_COMM_IF_DBG_ISR(*__chan, &ctrlc, vector, data);
159
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876 if (ctrlc) {
119
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877 cyg_hal_user_break( (CYG_ADDRWORD *)hal_saved_interrupt_state );
159
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878 return true;
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879 }
119
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880 }
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881 return false;
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882 }
105
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883 #endif // CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT || CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT
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884
101
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885 //--------------------------------------------------------------------------
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886 // Init function. It should be called from the platform initialization code.
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diff changeset
887 // For monitor configurations it will initialize the calling interface table,
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diff changeset
888 // for client configurations it will patch the existing table as per
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parents:
diff changeset
889 // configuration.
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diff changeset
890 void
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891 hal_if_init(void)
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892 {
156
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893 //**********************************************************************
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894 //
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diff changeset
895 // Note that if your RAM application is configured to initialize
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896 // the whole table _or_ the communication channels, you _cannot_
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diff changeset
897 // step through this function with the debugger. If your channel
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898 // configurations are set to the default, you should be able to
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diff changeset
899 // simply step over this function though (or use 'finish' once you
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diff changeset
900 // have entered this function if that GDB command works).
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901 //
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902 // If you really do need to debug this code, the best approach is
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903 // to have a working RedBoot / GDB stub in ROM and then change the
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904 // hal_virtual_vector_table to reside at some other address in the
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diff changeset
905 // RAM configuration than that used by the ROM monitor. Then
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906 // you'll be able to use the ROM monitor to debug the below code
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907 // and check that it does the right thing.
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908 //
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diff changeset
909 // Note that if you have a ROM monitor in ROM/flash which does
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diff changeset
910 // support virtual vectors, you should be able to disable the
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diff changeset
911 // option CYGSEM_HAL_VIRTUAL_VECTOR_INIT_WHOLE_TABLE. On some
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diff changeset
912 // targets (which predate the introduction of virtual vectors)
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diff changeset
913 // that option is enabled per default and needs to be explicitly
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diff changeset
914 // disabled when you have an updated ROM monitor.
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915 //
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diff changeset
916 //**********************************************************************
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917
151
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918 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_INIT_WHOLE_TABLE
101
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919 {
151
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920 int i;
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diff changeset
921
101
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922 // Initialize tables with the NOP service.
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923 // This should only be done for service routine entries - data
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924 // pointers should be NULLed.
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925 for (i = 0; i < CYGNUM_CALL_IF_TABLE_SIZE; i++)
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926 hal_virtual_vector_table[i] = (CYG_ADDRWORD) &nop_service;
151
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927
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928 // Version number
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929 CYGACC_CALL_IF_VERSION_SET(CYGNUM_CALL_IF_TABLE_VERSION_CALL
156
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930 |((CYG_ADDRWORD)CYGNUM_CALL_IF_TABLE_VERSION_COMM<<CYGNUM_CALL_IF_TABLE_VERSION_COMM_shift));
151
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931 }
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932 #endif
101
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933
151
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934 // Miscellaneous services with wrappers in this file.
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935 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_RESET
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936 CYGACC_CALL_IF_RESET_SET(reset);
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937 #endif
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938 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_DELAY_US
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939 CYGACC_CALL_IF_DELAY_US_SET(delay_us);
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940 #endif
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941
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942 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_CACHE
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943 // Cache functions
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944 CYGACC_CALL_IF_FLUSH_ICACHE_SET(flush_icache);
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945 CYGACC_CALL_IF_FLUSH_DCACHE_SET(flush_dcache);
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946 #endif
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947
156
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948 #ifdef CYGSEM_REDBOOT_FLASH_CONFIG
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949 CYGACC_CALL_IF_FLASH_CFG_OP_SET(flash_config_op);
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950 #endif
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951
791
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952 #ifdef CYGOPT_REDBOOT_FIS
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953 CYGACC_CALL_IF_FLASH_FIS_OP_SET(flash_fis_op);
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954 #endif
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955
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956 // Data entries not currently supported in eCos
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957 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_DATA
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958 CYGACC_CALL_IF_DBG_DATA_SET(0);
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959 #endif
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960
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961 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_VERSION
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962 CYGACC_CALL_IF_MONITOR_VERSION_SET(0);
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963 #endif
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964
151
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965 // Comm controls
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966 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_COMMS
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967 {
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968 int i, j;
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969
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970 // Clear out tables with safe dummy function.
112
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971 for (j = 0; j < CYGNUM_HAL_VIRTUAL_VECTOR_NUM_CHANNELS+1; j++)
101
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972 for (i = 0; i < CYGNUM_COMM_IF_TABLE_SIZE; i++)
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973 comm_channels[j][i] = (CYG_ADDRWORD) &nop_service;
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974
151
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975 // Set accessor functions
101
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976 CYGACC_CALL_IF_SET_DEBUG_COMM_SET(set_debug_comm);
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977 CYGACC_CALL_IF_SET_CONSOLE_COMM_SET(set_console_comm);
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978
151
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979 // Initialize console/debug procs. Note that these _must_
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980 // be set to empty before the comms init call.
105
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981 set_debug_comm(CYGNUM_CALL_IF_SET_COMM_ID_EMPTY);
103
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982 set_console_comm(CYGNUM_CALL_IF_SET_COMM_ID_EMPTY);
101
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983
151
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984 // Initialize channels. This used to be done in
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985 // hal_diag_init() and the stub initHardware() functions, but
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986 // it makes more sense to have here.
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987 cyg_hal_plf_comms_init();
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988
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989 // Always set the debug channel. If stubs are included, it is
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990 // necessary. If no stubs are included it does not hurt and is
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991 // likely to be required by the hal_if_diag_init code anyway
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992 // as it may rely on it if using a mangler.
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993 set_debug_comm(CYGNUM_HAL_VIRTUAL_VECTOR_DEBUG_CHANNEL);
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994 // Set console channel to a safe default. hal_if_diag_init
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995 // will override with console channel or mangler if necessary.
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996 set_console_comm(CYGNUM_HAL_VIRTUAL_VECTOR_DEBUG_CHANNEL);
101
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997 }
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998
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999 // Reset console interrupt flag.
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1000 CYGACC_CALL_IF_CONSOLE_INTERRUPT_FLAG_SET(0);
151
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1001 #endif
105
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1002
101
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1003 // Set up services provided by clients
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1004 #if defined(CYGFUN_HAL_COMMON_KERNEL_SUPPORT) && \
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1005 ( defined(CYGSEM_HAL_USE_ROM_MONITOR_GDB_stubs) \
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1006 || defined(CYGSEM_HAL_USE_ROM_MONITOR_CygMon))
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1007
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1008 patch_dbg_syscalls( (void *)(hal_virtual_vector_table) );
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1009 #endif
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1010
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1011 // Init client services
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1012 #if !defined(CYGPKG_KERNEL) && defined(CYGDBG_HAL_DEBUG_GDB_THREAD_SUPPORT)
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1013 // Only include this code if we do not have a kernel. Otherwise
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1014 // the kernel supplies the functionality for the app we are linked
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1015 // with.
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1016
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1017 // Prepare for application installation of thread info function in
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1018 // vector table.
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1019 init_thread_syscall( (void *)&hal_virtual_vector_table[CYGNUM_CALL_IF_DBG_SYSCALL] );
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1020 #endif
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1021
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1022 // Finally, install async breakpoint handler if it is configured in.
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1023 // FIXME: this should probably check for STUBS instead (but code is
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1024 // conditional on BREAK for now)
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1025 #if defined(CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT)
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1026 // Install async breakpoint handler into vector table.
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1027 CYGACC_CALL_IF_INSTALL_BPT_FN_SET(&cyg_hal_gdb_interrupt);
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1028 #endif
156
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1029
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1030 #if 0 != CYGINT_HAL_PLF_IF_INIT
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1031 // Call platform specific initializations - should only be used
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1032 // to augment what has already been set up, etc.
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1033 plf_if_init();
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1034 #endif
101
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1035 }
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1036