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annotate packages/hal/common/current/src/hal_if.c @ 1200:0e41ddaf36fe

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Flesh out exported FIS functions - from Patrick Doyle
author gthomas
date Sun, 07 Sep 2003 11:48:56 +0000
parents ff838098079a
children c15fe26f81c7
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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.
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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;
0e41ddaf36fe Flesh out exported FIS functions - from Patrick Doyle
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143 break;
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144 case CYGNUM_CALL_IF_FLASH_FIS_GET_MEM_BASE:
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145 *(CYG_ADDRESS *)val = fis->mem_base;
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146 res = true;
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147 break;
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148 case CYGNUM_CALL_IF_FLASH_FIS_GET_ENTRY_POINT:
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149 *(CYG_ADDRESS *)val = fis->entry_point;
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150 res = true;
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151 break;
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152 case CYGNUM_CALL_IF_FLASH_FIS_GET_DATA_LENGTH:
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153 *(unsigned long *)val = fis->data_length;
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154 res = true;
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155 break;
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156 case CYGNUM_CALL_IF_FLASH_FIS_GET_DESC_CKSUM:
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157 *(unsigned long *)val = fis->desc_cksum;
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158 res = true;
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159 break;
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160 case CYGNUM_CALL_IF_FLASH_FIS_GET_FILE_CKSUM:
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161 *(unsigned long *)val = fis->file_cksum;
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162 res = true;
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163 break;
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164 default:
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165 break;
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166 }
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167 }
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168 CYGARC_HAL_RESTORE_GP();
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169 return res;
791
a2dfa8bf3c57 Export RedBoot FIS functions - from Knud Woehler <knud.woehler@microplex.de>
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170 }
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171 #endif
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172
151
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173 //----------------------------
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174 // Delay uS
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175 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_DELAY_US
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176
156
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177 static __call_if_delay_us_t delay_us;
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178
105
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179 static void
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180 delay_us(cyg_int32 usecs)
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181 {
143
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182 CYGARC_HAL_SAVE_GP();
105
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183 #ifdef CYGPKG_KERNEL
143
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184 {
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185 cyg_int32 start, elapsed, elapsed_usec;
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186 cyg_int32 slice;
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187 cyg_int32 usec_per_period = CYGNUM_HAL_RTC_NUMERATOR/CYGNUM_HAL_RTC_DENOMINATOR/1000;
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188 cyg_int32 ticks_per_usec = CYGNUM_KERNEL_COUNTERS_RTC_PERIOD/usec_per_period;
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189
143
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190 do {
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191 // Spin in slices of 1/2 the RTC period. Allows interrupts
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192 // time to run without messing up the algorithm. If we
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193 // spun for 1 period (or more) of the RTC, there would also
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194 // be problems figuring out when the timer wrapped. We
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195 // may lose a tick or two for each cycle but it shouldn't
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196 // matter much.
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197
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198 // The tests against CYGNUM_KERNEL_COUNTERS_RTC_PERIOD
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199 // check for a value that would cause a 32 bit signed
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200 // multiply to overflow. But this also implies that just
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201 // multiplying by ticks_per_usec will yield a good
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202 // approximation. Otherwise we need to do the full
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203 // multiply+divide to get sufficient accuracy. Note that
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204 // this test is actually constant, so the compiler will
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205 // eliminate it and only compile the branch that is
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206 // selected.
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207
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208 if( usecs > usec_per_period/2 )
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209 slice = CYGNUM_KERNEL_COUNTERS_RTC_PERIOD/2;
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210 else if( CYGNUM_KERNEL_COUNTERS_RTC_PERIOD/2 >= 0x7FFFFFFF/usec_per_period )
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211 slice = usecs * ticks_per_usec;
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212 else
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213 {
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214 slice = usecs*CYGNUM_KERNEL_COUNTERS_RTC_PERIOD;
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215 slice /= usec_per_period;
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216 }
105
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217
143
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218 HAL_CLOCK_READ(&start);
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219 do {
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220 HAL_CLOCK_READ(&elapsed);
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221 elapsed = (elapsed - start); // counts up!
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222 if (elapsed < 0)
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223 elapsed += CYGNUM_KERNEL_COUNTERS_RTC_PERIOD;
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224 } while (elapsed < slice);
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225
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226 // Adjust by elapsed, not slice, since an interrupt may
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227 // have been stalling us for some time.
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228
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229 if( CYGNUM_KERNEL_COUNTERS_RTC_PERIOD >= 0x7FFFFFFF/usec_per_period )
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230 elapsed_usec = elapsed / ticks_per_usec;
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231 else
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232 {
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233 elapsed_usec = elapsed * usec_per_period;
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234 elapsed_usec = elapsed_usec / CYGNUM_KERNEL_COUNTERS_RTC_PERIOD;
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235 }
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236
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237 // It is possible for elapsed_usec to end up zero in some
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238 // circumstances and we could end up looping indefinitely.
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239 // Avoid that by ensuring that we always decrement usec by
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240 // at least 1 each time.
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241
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242 usecs -= elapsed_usec ? elapsed_usec : 1;
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243
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244 } while (usecs > 0);
143
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245 }
151
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diff changeset
246 #else // CYGPKG_KERNEL
136
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247 #ifdef HAL_DELAY_US
110
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248 // Use a HAL feature if defined
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249 HAL_DELAY_US(usecs);
136
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diff changeset
250 #else
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251 // If no accurate delay mechanism, just spin for a while. Having
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252 // an inaccurate delay is much better than no delay at all. The
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253 // count of 10 should mean the loop takes something resembling
136
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254 // 1us on most CPUs running between 30-100MHz [depends on how many
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255 // instructions this compiles to, how many dispatch units can be
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256 // used for the simple loop, actual CPU frequency, etc]
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diff changeset
257 while (usecs-- > 0) {
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diff changeset
258 int i;
143
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259 for (i = 0; i < 10; i++);
136
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260 }
151
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261 #endif // HAL_DELAY_US
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262 #endif // CYGPKG_KERNEL
143
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263 CYGARC_HAL_RESTORE_GP();
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264 }
151
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diff changeset
265 #endif // CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_DELAY_US
101
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266
151
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267 // Reset functions
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268 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_RESET
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269
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270 static __call_if_reset_t reset;
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271
101
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272 static void
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273 reset(void)
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274 {
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275 CYGARC_HAL_SAVE_GP();
101
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276 // With luck, the platform defines some magic that will cause a hardware
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277 // reset.
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diff changeset
278 #ifdef HAL_PLATFORM_RESET
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diff changeset
279 HAL_PLATFORM_RESET();
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280 #endif
101
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281
151
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282 #ifdef HAL_PLATFORM_RESET_ENTRY
101
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283 // If that's not the case (above is an empty statement) there may
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284 // be defined an address we can jump to - and effectively
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285 // reinitialize the system. Not quite as good as a reset, but it
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286 // is often enough.
151
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287 goto *HAL_PLATFORM_RESET_ENTRY;
101
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288
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289 #else
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290 #error " no RESET_ENTRY"
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291 #endif
1065
965fc7fbe135 * src/hal_if.c (hal_if_init): Remove kill_by_reset.
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292 CYG_FAIL("Reset failed");
105
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293 CYGARC_HAL_RESTORE_GP();
101
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294 }
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295
151
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296 #endif
101
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297
151
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298 //------------------------------------
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299 // NOP service
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300 #if defined(CYGSEM_HAL_VIRTUAL_VECTOR_INIT_WHOLE_TABLE) || \
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301 defined(CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_COMMS)
101
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302 static int
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303 nop_service(void)
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304 {
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305 // This is the default service. It always returns false (0), and
151
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306 // _does not_ trigger any assertions. Clients must either cope
101
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307 // with the service failure or assert.
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308 return 0;
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309 }
151
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310 #endif
101
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311
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312 //----------------------------------
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313 // Comm controls
151
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314 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_COMMS
101
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315
112
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316 #ifdef CYGNUM_HAL_VIRTUAL_VECTOR_AUX_CHANNELS
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317 #define CYGNUM_HAL_VIRTUAL_VECTOR_NUM_CHANNELS \
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318 (CYGNUM_HAL_VIRTUAL_VECTOR_COMM_CHANNELS+CYGNUM_HAL_VIRTUAL_VECTOR_AUX_CHANNELS)
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319 #else
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320 #define CYGNUM_HAL_VIRTUAL_VECTOR_NUM_CHANNELS \
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321 CYGNUM_HAL_VIRTUAL_VECTOR_COMM_CHANNELS
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322 #endif
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323
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324 static hal_virtual_comm_table_t comm_channels[CYGNUM_HAL_VIRTUAL_VECTOR_NUM_CHANNELS+1];
103
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325
101
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326 static int
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327 set_debug_comm(int __comm_id)
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328 {
103
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329 static int __selected_id = CYGNUM_CALL_IF_SET_COMM_ID_EMPTY;
105
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330 hal_virtual_comm_table_t* __chan;
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331 int interrupt_state = 0;
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332 int res = 1, update = 0;
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333 CYGARC_HAL_SAVE_GP();
101
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334
103
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335 CYG_ASSERT(__comm_id >= CYGNUM_CALL_IF_SET_COMM_ID_MANGLER
112
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336 && __comm_id < CYGNUM_HAL_VIRTUAL_VECTOR_NUM_CHANNELS,
101
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337 "Invalid channel");
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338
103
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339 switch (__comm_id) {
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340 case CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT:
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341 if (__selected_id > 0)
105
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342 res = __selected_id-1;
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343 else if (__selected_id == 0)
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344 res = CYGNUM_CALL_IF_SET_COMM_ID_MANGLER;
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345 else
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346 res = __selected_id;
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347 break;
101
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348
103
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349 case CYGNUM_CALL_IF_SET_COMM_ID_EMPTY:
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350 CYGACC_CALL_IF_DEBUG_PROCS_SET(0);
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351 __selected_id = __comm_id;
105
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352 break;
103
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353
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354 case CYGNUM_CALL_IF_SET_COMM_ID_MANGLER:
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355 __comm_id = 0;
105
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356 update = 1;
103
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357 break;
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358
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359 default:
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360 __comm_id++; // skip mangler entry
105
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361 update = 1;
103
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362 break;
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363 }
105
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364
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365 if (update) {
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366 // Find the interrupt state of the channel.
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367 __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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368 if (__chan)
107
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369 interrupt_state = CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_IRQ_DISABLE);
105
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370
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371 __selected_id = __comm_id;
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372 CYGACC_CALL_IF_DEBUG_PROCS_SET(comm_channels[__comm_id]);
101
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373
105
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374 // Set interrupt state on the new channel.
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375 __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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376 if (interrupt_state)
107
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377 CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_IRQ_ENABLE);
105
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378 else
107
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379 CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_IRQ_DISABLE);
105
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380 }
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381
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382 CYGARC_HAL_RESTORE_GP();
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383 return res;
101
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384 }
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385
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386 static int
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387 set_console_comm(int __comm_id)
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388 {
103
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389 static int __selected_id = CYGNUM_CALL_IF_SET_COMM_ID_EMPTY;
105
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390 int res = 1, update = 0;
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391 CYGARC_HAL_SAVE_GP();
101
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392
103
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393 CYG_ASSERT(__comm_id >= CYGNUM_CALL_IF_SET_COMM_ID_MANGLER
112
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394 && __comm_id < CYGNUM_HAL_VIRTUAL_VECTOR_NUM_CHANNELS,
101
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395 "Invalid channel");
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396
103
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397 switch (__comm_id) {
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398 case CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT:
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399 if (__selected_id > 0)
105
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400 res = __selected_id-1;
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401 else if (__selected_id == 0)
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402 res = CYGNUM_CALL_IF_SET_COMM_ID_MANGLER;
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403 else
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404 res = __selected_id;
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405 break;
101
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406
103
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407 case CYGNUM_CALL_IF_SET_COMM_ID_EMPTY:
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408 CYGACC_CALL_IF_CONSOLE_PROCS_SET(0);
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409 __selected_id = __comm_id;
105
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410 break;
103
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411
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412 case CYGNUM_CALL_IF_SET_COMM_ID_MANGLER:
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413 __comm_id = 0;
105
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414 update = 1;
103
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415 break;
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416
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diff changeset
417 default:
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418 __comm_id++; // skip mangler entry
105
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419 update = 1;
103
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420 break;
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421 }
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422
105
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423 if (update) {
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424 __selected_id = __comm_id;
101
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425
105
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426 CYGACC_CALL_IF_CONSOLE_PROCS_SET(comm_channels[__comm_id]);
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427 }
101
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428
105
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429 CYGARC_HAL_RESTORE_GP();
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430 return res;
101
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431 }
151
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432 #endif
101
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433
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434 //----------------------------------
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435 // Cache functions
151
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436 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_CACHE
101
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437
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438 static void
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439 flush_icache(void *__p, int __nbytes)
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440 {
105
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441 CYGARC_HAL_SAVE_GP();
101
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442 #ifdef HAL_ICACHE_FLUSH
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443 HAL_ICACHE_FLUSH( __p , __nbytes );
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444 #elif defined(HAL_ICACHE_INVALIDATE)
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445 HAL_ICACHE_INVALIDATE();
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446 #endif
105
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447 CYGARC_HAL_RESTORE_GP();
101
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448 }
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449
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450 static void
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451 flush_dcache(void *__p, int __nbytes)
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452 {
105
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453 CYGARC_HAL_SAVE_GP();
101
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454 #ifdef HAL_DCACHE_FLUSH
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455 HAL_DCACHE_FLUSH( __p , __nbytes );
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456 #elif defined(HAL_DCACHE_INVALIDATE)
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457 HAL_DCACHE_INVALIDATE();
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458 #endif
105
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459 CYGARC_HAL_RESTORE_GP();
101
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460 }
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461 #endif
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462
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463 #if defined(CYGSEM_HAL_VIRTUAL_VECTOR_DIAG)
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464 //-----------------------------------------------------------------------------
151
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465 // GDB console output mangler (O-packetizer)
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466 // COMMS init function at end.
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467
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468 // This gets called via the virtual vector console comms entry and
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469 // handles O-packetization. The debug comms entries are used for the
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470 // actual device IO.
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471 static cyg_uint8
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472 cyg_hal_diag_mangler_gdb_getc(void* __ch_data)
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473 {
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474 cyg_uint8 __ch;
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475 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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476 CYGARC_HAL_SAVE_GP();
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477
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478 __ch = CYGACC_COMM_IF_GETC(*__chan);
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479
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480 CYGARC_HAL_RESTORE_GP();
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481
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482 return __ch;
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483 }
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484
208
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485 static char __mangler_line[100];
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486 static int __mangler_pos = 0;
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487
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488 static void
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489 cyg_hal_diag_mangler_gdb_flush(void* __ch_data)
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490 {
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491 CYG_INTERRUPT_STATE old;
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492 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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493
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494 // Nothing to do if mangler buffer is empty.
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495 if (__mangler_pos == 0)
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496 return;
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497
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498 // Disable interrupts. This prevents GDB trying to interrupt us
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499 // while we are in the middle of sending a packet. The serial
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500 // receive interrupt will be seen when we re-enable interrupts
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501 // later.
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502 #if defined(CYG_HAL_STARTUP_ROM) \
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503 || !defined(CYG_HAL_GDB_ENTER_CRITICAL_IO_REGION)
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504 HAL_DISABLE_INTERRUPTS(old);
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505 #else
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506 CYG_HAL_GDB_ENTER_CRITICAL_IO_REGION(old);
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507 #endif
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508
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509 #if CYGNUM_HAL_DEBUG_GDB_PROTOCOL_RETRIES != 0
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510 // Only wait 500ms for data to arrive - avoid "stuck" connections
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511 CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_SET_TIMEOUT, CYGNUM_HAL_DEBUG_GDB_PROTOCOL_TIMEOUT);
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512 #endif
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513
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diff changeset
514 while(1)
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515 {
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516 static const char hex[] = "0123456789ABCDEF";
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517 cyg_uint8 csum = 0, c1;
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diff changeset
518 int i;
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519
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520 CYGACC_COMM_IF_PUTC(*__chan, '$');
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521 CYGACC_COMM_IF_PUTC(*__chan, 'O');
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522 csum += 'O';
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523 for( i = 0; i < __mangler_pos; i++ )
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524 {
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525 char ch = __mangler_line[i];
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526 char h = hex[(ch>>4)&0xF];
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527 char l = hex[ch&0xF];
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528 CYGACC_COMM_IF_PUTC(*__chan, h);
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529 CYGACC_COMM_IF_PUTC(*__chan, l);
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530 csum += h;
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531 csum += l;
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532 }
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533 CYGACC_COMM_IF_PUTC(*__chan, '#');
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534 CYGACC_COMM_IF_PUTC(*__chan, hex[(csum>>4)&0xF]);
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535 CYGACC_COMM_IF_PUTC(*__chan, hex[csum&0xF]);
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536
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537 nak:
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538 #if CYGNUM_HAL_DEBUG_GDB_PROTOCOL_RETRIES != 0
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539 if (CYGACC_COMM_IF_GETC_TIMEOUT(*__chan, &c1) == 0) {
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540 c1 = '-';
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541 if (tries && (--tries == 0)) c1 = '+';
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542 }
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diff changeset
543 #else
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544 c1 = CYGACC_COMM_IF_GETC(*__chan);
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diff changeset
545 #endif
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diff changeset
546
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547 if( c1 == '+' ) break;
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548
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549 if( cyg_hal_is_break( &c1 , 1 ) ) {
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550 // Caller's responsibility to react on this.
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551 CYGACC_CALL_IF_CONSOLE_INTERRUPT_FLAG_SET(1);
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diff changeset
552 break;
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diff changeset
553 }
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554 if( c1 != '-' ) goto nak;
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555 }
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556
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557 __mangler_pos = 0;
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558 // And re-enable interrupts
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559 #if defined(CYG_HAL_STARTUP_ROM) \
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560 || !defined(CYG_HAL_GDB_ENTER_CRITICAL_IO_REGION)
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561 HAL_RESTORE_INTERRUPTS(old);
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562 #else
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563 CYG_HAL_GDB_LEAVE_CRITICAL_IO_REGION(old);
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564 #endif
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565 }
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566
151
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567 static void
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568 cyg_hal_diag_mangler_gdb_putc(void* __ch_data, cyg_uint8 c)
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569 {
191
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570 #if CYGNUM_HAL_DEBUG_GDB_PROTOCOL_RETRIES != 0
179
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571 int tries = CYGNUM_HAL_DEBUG_GDB_PROTOCOL_RETRIES;
191
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572 #endif
151
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573
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574 // No need to send CRs
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575 if( c == '\r' ) return;
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576
161
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577 CYGARC_HAL_SAVE_GP();
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578
208
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579 __mangler_line[__mangler_pos++] = c;
179
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580
208
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581 if( c == '\n' || __mangler_pos == sizeof(__mangler_line) )
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582 cyg_hal_diag_mangler_gdb_flush(__ch_data);
151
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583
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584 CYGARC_HAL_RESTORE_GP();
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585 }
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586
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587 static void
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588 cyg_hal_diag_mangler_gdb_write(void* __ch_data,
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589 const cyg_uint8* __buf, cyg_uint32 __len)
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590 {
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591 CYGARC_HAL_SAVE_GP();
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592
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593 while(__len-- > 0)
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594 cyg_hal_diag_mangler_gdb_putc(__ch_data, *__buf++);
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595
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596 CYGARC_HAL_RESTORE_GP();
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597 }
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598
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599 static void
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600 cyg_hal_diag_mangler_gdb_read(void* __ch_data,
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601 cyg_uint8* __buf, cyg_uint32 __len)
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602 {
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603 CYGARC_HAL_SAVE_GP();
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604
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605 while(__len-- > 0)
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606 *__buf++ = cyg_hal_diag_mangler_gdb_getc(__ch_data);
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607
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608 CYGARC_HAL_RESTORE_GP();
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609 }
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610
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611 static int
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612 cyg_hal_diag_mangler_gdb_control(void *__ch_data,
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613 __comm_control_cmd_t __func, ...)
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614 {
208
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615 CYGARC_HAL_SAVE_GP();
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616
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617 if (__func == __COMMCTL_FLUSH_OUTPUT)
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618 cyg_hal_diag_mangler_gdb_flush(__ch_data);
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619
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620 CYGARC_HAL_RESTORE_GP();
151
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621 return 0;
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622 }
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623
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624 // This is the COMMS init function. It gets called both by the stubs
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625 // and diag init code to initialize the COMMS mangler channel table -
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626 // that's all. The callers have to decide whether to actually use this
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627 // channel.
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628 void
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629 cyg_hal_diag_mangler_gdb_init(void)
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630 {
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631 hal_virtual_comm_table_t* comm;
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632 int cur = CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT);
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633
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634 // Initialize mangler procs
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635 CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_MANGLER);
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636 comm = CYGACC_CALL_IF_CONSOLE_PROCS();
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637 CYGACC_COMM_IF_WRITE_SET(*comm, cyg_hal_diag_mangler_gdb_write);
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638 CYGACC_COMM_IF_READ_SET(*comm, cyg_hal_diag_mangler_gdb_read);
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639 CYGACC_COMM_IF_PUTC_SET(*comm, cyg_hal_diag_mangler_gdb_putc);
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640 CYGACC_COMM_IF_GETC_SET(*comm, cyg_hal_diag_mangler_gdb_getc);
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641 CYGACC_COMM_IF_CONTROL_SET(*comm, cyg_hal_diag_mangler_gdb_control);
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642
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643 // Restore the original console channel.
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644 CYGACC_CALL_IF_SET_CONSOLE_COMM(cur);
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645 }
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646
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647 //-----------------------------------------------------------------------------
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648 // Null console output mangler
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649 // COMMS init function at end.
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650
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651 // This gets called via the virtual vector console comms entry and
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652 // just forwards IO to the debug comms entries.
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653 // This differs from setting the console channel to the same as the
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654 // debug channel in that console output will go to the debug channel
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655 // even if the debug channel is changed.
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656 static cyg_uint8
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657 cyg_hal_diag_mangler_null_getc(void* __ch_data)
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658 {
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659 cyg_uint8 __ch;
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660 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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661 CYGARC_HAL_SAVE_GP();
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662
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663 __ch = CYGACC_COMM_IF_GETC(*__chan);
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664
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665 CYGARC_HAL_RESTORE_GP();
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666
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667 return __ch;
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668 }
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669
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670
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671 static void
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672 cyg_hal_diag_mangler_null_putc(void* __ch_data, cyg_uint8 c)
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673 {
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674 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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675
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676 CYGARC_HAL_SAVE_GP();
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677
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678 CYGACC_COMM_IF_PUTC(*__chan, c);
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679
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680 CYGARC_HAL_RESTORE_GP();
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681 }
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682
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683 static void
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684 cyg_hal_diag_mangler_null_write(void* __ch_data,
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685 const cyg_uint8* __buf, cyg_uint32 __len)
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686 {
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687 CYGARC_HAL_SAVE_GP();
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688
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689 while(__len-- > 0)
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690 cyg_hal_diag_mangler_null_putc(__ch_data, *__buf++);
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691
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692 CYGARC_HAL_RESTORE_GP();
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693 }
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694
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695 static void
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696 cyg_hal_diag_mangler_null_read(void* __ch_data,
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diff changeset
697 cyg_uint8* __buf, cyg_uint32 __len)
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698 {
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diff changeset
699 CYGARC_HAL_SAVE_GP();
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diff changeset
700
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diff changeset
701 while(__len-- > 0)
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diff changeset
702 *__buf++ = cyg_hal_diag_mangler_null_getc(__ch_data);
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703
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diff changeset
704 CYGARC_HAL_RESTORE_GP();
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diff changeset
705 }
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diff changeset
706
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diff changeset
707 static int
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diff changeset
708 cyg_hal_diag_mangler_null_control(void *__ch_data,
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diff changeset
709 __comm_control_cmd_t __func, ...)
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diff changeset
710 {
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diff changeset
711 // Do nothing (yet).
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diff changeset
712 return 0;
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diff changeset
713 }
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diff changeset
714
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diff changeset
715 // This is the COMMS init function. It gets called both by the stubs
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diff changeset
716 // and diag init code to initialize the COMMS mangler channel table -
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diff changeset
717 // that's all. The callers have to decide whether to actually use this
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diff changeset
718 // channel.
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diff changeset
719 void
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diff changeset
720 cyg_hal_diag_mangler_null_init(void)
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721 {
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diff changeset
722 hal_virtual_comm_table_t* comm;
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diff changeset
723 int cur = CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT);
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724
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725 // Initialize mangler procs
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726 CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_MANGLER);
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727 comm = CYGACC_CALL_IF_CONSOLE_PROCS();
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728 CYGACC_COMM_IF_WRITE_SET(*comm, cyg_hal_diag_mangler_null_write);
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729 CYGACC_COMM_IF_READ_SET(*comm, cyg_hal_diag_mangler_null_read);
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diff changeset
730 CYGACC_COMM_IF_PUTC_SET(*comm, cyg_hal_diag_mangler_null_putc);
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diff changeset
731 CYGACC_COMM_IF_GETC_SET(*comm, cyg_hal_diag_mangler_null_getc);
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diff changeset
732 CYGACC_COMM_IF_CONTROL_SET(*comm, cyg_hal_diag_mangler_null_control);
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diff changeset
733
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734 // Restore the original console channel.
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diff changeset
735 CYGACC_CALL_IF_SET_CONSOLE_COMM(cur);
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diff changeset
736 }
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737
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diff changeset
738 //-----------------------------------------------------------------------------
101
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739 // Console IO functions that adhere to the virtual vector table semantics in
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diff changeset
740 // order to ensure proper debug agent mangling when required.
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741 //
115
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diff changeset
742 externC void cyg_hal_plf_comms_init(void);
151
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743
105
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744 void
101
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745 hal_if_diag_init(void)
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746 {
156
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747 // This function may be called from various places and the code
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748 // should only run once.
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749 static cyg_uint8 called = 0;
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750 if (called) return;
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751 called = 1;
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752
151
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diff changeset
753 #ifndef CYGSEM_HAL_VIRTUAL_VECTOR_INHERIT_CONSOLE
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754
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diff changeset
755 #if defined(CYGDBG_HAL_DIAG_TO_DEBUG_CHAN)
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756 // Use the mangler channel, which in turn uses the debug channel.
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757 CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_MANGLER);
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758
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759 // Initialize the mangler channel.
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diff changeset
760 #if defined(CYGSEM_HAL_DIAG_MANGLER_GDB)
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761 cyg_hal_diag_mangler_gdb_init();
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diff changeset
762 #elif defined(CYGSEM_HAL_DIAG_MANGLER_None)
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763 cyg_hal_diag_mangler_null_init();
103
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764 #endif
101
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765
151
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766 #else // CYGDBG_HAL_DIAG_TO_DEBUG_CHAN
103
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767
151
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768 // Use an actual (raw) IO channel
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769 CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL);
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770
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771 #endif // CYGDBG_HAL_DIAG_TO_DEBUG_CHAN
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772
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773 #endif // CYGSEM_HAL_VIRTUAL_VECTOR_INHERIT_CONSOLE
101
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774 }
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775
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776 void
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777 hal_if_diag_write_char(char c)
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778 {
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779 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_CONSOLE_PROCS();
179
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diff changeset
780
101
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781 if (__chan)
107
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782 CYGACC_COMM_IF_PUTC(*__chan, c);
101
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783 else {
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784 __chan = CYGACC_CALL_IF_DEBUG_PROCS();
151
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785
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786 // FIXME: What should be done if assertions are not enabled?
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diff changeset
787 // This is a bad bad situation - we have no means for diag
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788 // output; we want to hit a breakpoint to alert the developer
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diff changeset
789 // or something like that.
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790 CYG_ASSERT(__chan, "No valid channel set");
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791
107
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diff changeset
792 CYGACC_COMM_IF_PUTC(*__chan, c);
101
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793 }
105
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diff changeset
794
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795 // Check interrupt flag
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796 if (CYGACC_CALL_IF_CONSOLE_INTERRUPT_FLAG()) {
136
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diff changeset
797 CYGACC_CALL_IF_CONSOLE_INTERRUPT_FLAG_SET(0);
105
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diff changeset
798 cyg_hal_user_break(0);
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799 }
101
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800 }
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diff changeset
801
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diff changeset
802 void
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803 hal_if_diag_read_char(char *c)
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804 {
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805 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_CONSOLE_PROCS();
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806
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807 if (__chan)
107
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808 *c = CYGACC_COMM_IF_GETC(*__chan);
101
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809 else {
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810 __chan = CYGACC_CALL_IF_DEBUG_PROCS();
151
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811
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812 // FIXME: What should be done if assertions are not enabled?
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813 // This is a bad bad situation - we have no means for diag
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diff changeset
814 // output; we want to hit a breakpoint to alert the developer
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diff changeset
815 // or something like that.
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816 CYG_ASSERT(__chan, "No valid channel set");
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817
107
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diff changeset
818 *c = CYGACC_COMM_IF_GETC(*__chan);
101
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819 }
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820 }
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821 #endif // CYGSEM_HAL_VIRTUAL_VECTOR_DIAG
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822
105
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823 //=============================================================================
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824 // CtrlC support
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diff changeset
825 //=============================================================================
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diff changeset
826
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827 #if defined(CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT) \
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828 || defined(CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT)
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829
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830 struct Hal_SavedRegisters *hal_saved_interrupt_state;
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831
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diff changeset
832 void
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833 hal_ctrlc_isr_init(void)
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834 {
110
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835 // A ROM monitor never enables the interrupt itself. This is left
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836 // to the (RAM) application.
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837 #ifndef CYGSEM_HAL_ROM_MONITOR
105
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838 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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839
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840 #if 1 // Prevents crash on older stubs
151
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841 int v_m;
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842 // Allow only ctrl-c interrupt enabling when version in table is
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843 // below legal max and above the necessary service, and _not_
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844 // the value we set it to below.
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845 v_m = CYGACC_CALL_IF_VERSION() & CYGNUM_CALL_IF_TABLE_VERSION_CALL_MASK;
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846 if (v_m >= CYGNUM_CALL_IF_TABLE_VERSION_CALL_MAX
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847 || v_m < CYGNUM_CALL_IF_SET_DEBUG_COMM
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848 || v_m == CYGNUM_CALL_IF_TABLE_VERSION_CALL_HACK)
105
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849 return;
110
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850
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851 // Now trash that value - otherwise downloading an image with
151
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852 // builtin stubs on a board with older stubs (which will cause the
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853 // version to be set to VERSION_CALL) may cause all subsequent
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854 // runs to (wrongly) fall through to the below code. If there is
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855 // a new stub on the board, it will reinitialize the version field
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856 // on reset. Yes, this is a gross hack!
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857 CYGACC_CALL_IF_VERSION_SET(CYGNUM_CALL_IF_TABLE_VERSION_CALL_HACK);
105
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858 #endif
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859
151
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860 // We can only enable interrupts on a valid debug channel.
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861 if (__chan)
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862 CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_IRQ_ENABLE);
110
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863 #endif
105
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864 }
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865
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866 cyg_uint32
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867 hal_ctrlc_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data)
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868 {
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869 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();
151
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870 int isr_ret = 0, ctrlc = 0;
105
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871
151
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872 if (__chan) {
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873 isr_ret = CYGACC_COMM_IF_DBG_ISR(*__chan, &ctrlc, vector, data);
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874 if (ctrlc)
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875 cyg_hal_user_break( (CYG_ADDRWORD *)hal_saved_interrupt_state );
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876 }
105
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877 return isr_ret;
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878 }
119
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879
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880 cyg_bool
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diff changeset
881 hal_ctrlc_check(CYG_ADDRWORD vector, CYG_ADDRWORD data)
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882 {
151
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883 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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884 int gdb_vector = vector-1;
119
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885 int isr_ret, ctrlc = 0;
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886
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887 // This check only to avoid crash on older stubs in case of unhandled
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888 // interrupts. It is a bit messy, but required in a transition period.
151
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889 if (__chan &&
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890 (CYGNUM_CALL_IF_TABLE_VERSION_CALL_HACK ==
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891 (CYGACC_CALL_IF_VERSION() & CYGNUM_CALL_IF_TABLE_VERSION_CALL_MASK))){
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892 gdb_vector = CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_DBG_ISR_VECTOR);
119
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893 }
145
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894 if (vector == gdb_vector) {
151
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895 isr_ret = CYGACC_COMM_IF_DBG_ISR(*__chan, &ctrlc, vector, data);
159
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896 if (ctrlc) {
119
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897 cyg_hal_user_break( (CYG_ADDRWORD *)hal_saved_interrupt_state );
159
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898 return true;
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899 }
119
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900 }
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901 return false;
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902 }
105
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903 #endif // CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT || CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT
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904
101
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905 //--------------------------------------------------------------------------
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906 // Init function. It should be called from the platform initialization code.
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907 // For monitor configurations it will initialize the calling interface table,
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908 // for client configurations it will patch the existing table as per
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909 // configuration.
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910 void
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911 hal_if_init(void)
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912 {
156
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913 //**********************************************************************
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914 //
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915 // Note that if your RAM application is configured to initialize
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916 // the whole table _or_ the communication channels, you _cannot_
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917 // step through this function with the debugger. If your channel
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918 // configurations are set to the default, you should be able to
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919 // simply step over this function though (or use 'finish' once you
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920 // have entered this function if that GDB command works).
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921 //
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922 // If you really do need to debug this code, the best approach is
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923 // to have a working RedBoot / GDB stub in ROM and then change the
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924 // hal_virtual_vector_table to reside at some other address in the
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925 // RAM configuration than that used by the ROM monitor. Then
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926 // you'll be able to use the ROM monitor to debug the below code
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927 // and check that it does the right thing.
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928 //
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929 // Note that if you have a ROM monitor in ROM/flash which does
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930 // support virtual vectors, you should be able to disable the
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931 // option CYGSEM_HAL_VIRTUAL_VECTOR_INIT_WHOLE_TABLE. On some
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932 // targets (which predate the introduction of virtual vectors)
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933 // that option is enabled per default and needs to be explicitly
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934 // disabled when you have an updated ROM monitor.
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935 //
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936 //**********************************************************************
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937
151
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938 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_INIT_WHOLE_TABLE
101
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939 {
151
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940 int i;
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941
101
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942 // Initialize tables with the NOP service.
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943 // This should only be done for service routine entries - data
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944 // pointers should be NULLed.
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945 for (i = 0; i < CYGNUM_CALL_IF_TABLE_SIZE; i++)
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946 hal_virtual_vector_table[i] = (CYG_ADDRWORD) &nop_service;
151
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diff changeset
947
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948 // Version number
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949 CYGACC_CALL_IF_VERSION_SET(CYGNUM_CALL_IF_TABLE_VERSION_CALL
156
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950 |((CYG_ADDRWORD)CYGNUM_CALL_IF_TABLE_VERSION_COMM<<CYGNUM_CALL_IF_TABLE_VERSION_COMM_shift));
151
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951 }
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952 #endif
101
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953
151
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954 // Miscellaneous services with wrappers in this file.
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955 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_RESET
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956 CYGACC_CALL_IF_RESET_SET(reset);
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957 #endif
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958 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_DELAY_US
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959 CYGACC_CALL_IF_DELAY_US_SET(delay_us);
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960 #endif
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961
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962 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_CACHE
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963 // Cache functions
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964 CYGACC_CALL_IF_FLUSH_ICACHE_SET(flush_icache);
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965 CYGACC_CALL_IF_FLUSH_DCACHE_SET(flush_dcache);
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966 #endif
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967
156
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968 #ifdef CYGSEM_REDBOOT_FLASH_CONFIG
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969 CYGACC_CALL_IF_FLASH_CFG_OP_SET(flash_config_op);
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970 #endif
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971
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972 #ifdef CYGOPT_REDBOOT_FIS
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973 CYGACC_CALL_IF_FLASH_FIS_OP_SET(flash_fis_op);
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974 #endif
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975
151
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976 // Data entries not currently supported in eCos
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977 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_DATA
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978 CYGACC_CALL_IF_DBG_DATA_SET(0);
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979 #endif
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980
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981 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_VERSION
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982 CYGACC_CALL_IF_MONITOR_VERSION_SET(0);
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983 #endif
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984
151
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985 // Comm controls
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986 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_COMMS
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987 {
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988 int i, j;
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989
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990 // Clear out tables with safe dummy function.
112
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991 for (j = 0; j < CYGNUM_HAL_VIRTUAL_VECTOR_NUM_CHANNELS+1; j++)
101
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992 for (i = 0; i < CYGNUM_COMM_IF_TABLE_SIZE; i++)
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993 comm_channels[j][i] = (CYG_ADDRWORD) &nop_service;
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994
151
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995 // Set accessor functions
101
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996 CYGACC_CALL_IF_SET_DEBUG_COMM_SET(set_debug_comm);
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997 CYGACC_CALL_IF_SET_CONSOLE_COMM_SET(set_console_comm);
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998
151
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999 // Initialize console/debug procs. Note that these _must_
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1000 // be set to empty before the comms init call.
105
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1001 set_debug_comm(CYGNUM_CALL_IF_SET_COMM_ID_EMPTY);
103
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1002 set_console_comm(CYGNUM_CALL_IF_SET_COMM_ID_EMPTY);
101
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1003
151
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1004 // Initialize channels. This used to be done in
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1005 // hal_diag_init() and the stub initHardware() functions, but
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1006 // it makes more sense to have here.
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1007 cyg_hal_plf_comms_init();
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1008
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1009 // Always set the debug channel. If stubs are included, it is
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1010 // necessary. If no stubs are included it does not hurt and is
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1011 // likely to be required by the hal_if_diag_init code anyway
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1012 // as it may rely on it if using a mangler.
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1013 set_debug_comm(CYGNUM_HAL_VIRTUAL_VECTOR_DEBUG_CHANNEL);
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1014 // Set console channel to a safe default. hal_if_diag_init
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1015 // will override with console channel or mangler if necessary.
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1016 set_console_comm(CYGNUM_HAL_VIRTUAL_VECTOR_DEBUG_CHANNEL);
101
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1017 }
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1018
105
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1019 // Reset console interrupt flag.
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1020 CYGACC_CALL_IF_CONSOLE_INTERRUPT_FLAG_SET(0);
151
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1021 #endif
105
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1022
101
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1023 // Set up services provided by clients
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1024 #if defined(CYGFUN_HAL_COMMON_KERNEL_SUPPORT) && \
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1025 ( defined(CYGSEM_HAL_USE_ROM_MONITOR_GDB_stubs) \
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1026 || defined(CYGSEM_HAL_USE_ROM_MONITOR_CygMon))
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1027
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1028 patch_dbg_syscalls( (void *)(hal_virtual_vector_table) );
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1029 #endif
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1030
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1031 // Init client services
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1032 #if !defined(CYGPKG_KERNEL) && defined(CYGDBG_HAL_DEBUG_GDB_THREAD_SUPPORT)
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1033 // Only include this code if we do not have a kernel. Otherwise
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1034 // the kernel supplies the functionality for the app we are linked
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1035 // with.
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1036
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1037 // Prepare for application installation of thread info function in
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1038 // vector table.
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1039 init_thread_syscall( (void *)&hal_virtual_vector_table[CYGNUM_CALL_IF_DBG_SYSCALL] );
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1040 #endif
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1041
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1042 // Finally, install async breakpoint handler if it is configured in.
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1043 // FIXME: this should probably check for STUBS instead (but code is
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1044 // conditional on BREAK for now)
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1045 #if defined(CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT)
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1046 // Install async breakpoint handler into vector table.
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1047 CYGACC_CALL_IF_INSTALL_BPT_FN_SET(&cyg_hal_gdb_interrupt);
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1048 #endif
156
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1049
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1050 #if 0 != CYGINT_HAL_PLF_IF_INIT
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1051 // Call platform specific initializations - should only be used
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1052 // to augment what has already been set up, etc.
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1053 plf_if_init();
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1054 #endif
101
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1055 }
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1056