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annotate packages/hal/common/current/src/hal_if.c @ 103:95f3e12a6327 ecos-sw-2000-06-23

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Merge from eCos master repository on 2000-06-23-16:41:10-BST
author jlarmour
date Fri, 23 Jun 2000 17:06:31 +0000
parents c37d3a9e1b28
children 5a0cc6c243a9
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1 //=============================================================================
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2 //
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3 // hal_if.c
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4 //
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5 // ROM/RAM interfacing functions
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6 //
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7 //=============================================================================
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8 //####COPYRIGHTBEGIN####
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9 //
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10 // -------------------------------------------
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11 // The contents of this file are subject to the Red Hat eCos Public License
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12 // Version 1.1 (the "License"); you may not use this file except in
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13 // compliance with the License. You may obtain a copy of the License at
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14 // http://www.redhat.com/
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15 //
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16 // Software distributed under the License is distributed on an "AS IS"
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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18 // License for the specific language governing rights and limitations under
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19 // the License.
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20 //
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21 // The Original Code is eCos - Embedded Configurable Operating System,
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22 // released September 30, 1998.
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23 //
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24 // The Initial Developer of the Original Code is Red Hat.
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25 // Portions created by Red Hat are
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26 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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27 // All Rights Reserved.
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28 // -------------------------------------------
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29 //
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30 //####COPYRIGHTEND####
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31 //=============================================================================
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32 //#####DESCRIPTIONBEGIN####
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33 //
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34 // Author(s): jskov
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35 // Contributors:jskov
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36 // Date: 2000-06-07
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37 //
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38 //####DESCRIPTIONEND####
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39 //
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40 //=============================================================================
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41
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42 #include <pkgconf/hal.h>
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43
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44 #include <cyg/infra/cyg_ass.h> // assertions
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45
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46 #include <cyg/hal/hal_arch.h> // set/restore GP
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47
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48 #include <cyg/hal/hal_io.h> // IO macros
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49 #include <cyg/hal/hal_if.h> // our interface
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50
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51 #include <cyg/hal/hal_diag.h> // Diag IO
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52
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53 #include <cyg/hal/hal_stub.h> // stub functionality
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54 #include <cyg/hal/plf_stub.h> // reset entry - FIXME, should be moved
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55
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56
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57 //--------------------------------------------------------------------------
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58
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59 externC void patch_dbg_syscalls(void * vector);
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60 externC void init_thread_syscall(void * vector);
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61
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62 externC CYG_ADDRWORD hal_interrupt_handlers[];
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63 externC CYG_ADDRWORD hal_vsr_table[];
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64
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65 //--------------------------------------------------------------------------
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66 // Implementations and function wrappers for monitor services
103
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67 #ifdef CYGPRI_HAL_IMPLEMENTS_IF_SERVICES
101
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68
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69 static void
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70 reset(void)
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71 {
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72 // With luck, the platform defines some magic that will cause a hardware
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73 // reset.
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74 HAL_STUB_PLATFORM_RESET();
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75
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76 #ifdef HAL_STUB_PLATFORM_RESET_ENTRY
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77 // If that's not the case (above is an empty statement) there may
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78 // be defined an address we can jump to - and effectively
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79 // reinitialize the system. Not quite as good as a reset, but it
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80 // is often enough.
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81 goto *HAL_STUB_PLATFORM_RESET_ENTRY;
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82
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83 #else
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84 #error " no RESET_ENTRY"
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85 #endif
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86 }
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87
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88 // This is the system's default kill signal routine. Unless overridden
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89 // by the application, it will cause a board reset when GDB quits the
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90 // connection. (The user can avoid the reset by using the GDB 'detach'
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91 // command instead of 'kill' or 'quit').
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92 static int
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93 kill_by_reset(int __irq_nr, void* __regs)
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94 {
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95 reset();
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96 return 0;
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97 }
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98
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99 static int
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100 nop_service(void)
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101 {
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102 // This is the default service. It always returns false (0), and
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103 // _does_ not trigger any assertions. Clients must either cope
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104 // with the service failure or assert.
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105 return 0;
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106 }
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107
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108 //----------------------------------
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109 // Comm controls
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110
103
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111 static hal_virtual_comm_table_t comm_channels[CYGNUM_HAL_VIRTUAL_VECTOR_COMM_CHANNELS+1];
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112
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113
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114
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115 static int
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116 set_debug_comm(int __comm_id)
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117 {
103
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118 static int __selected_id = CYGNUM_CALL_IF_SET_COMM_ID_EMPTY;
101
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119
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120 CYG_ASSERT(__comm_id >= CYGNUM_CALL_IF_SET_COMM_ID_MANGLER
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121 && __comm_id < CYGNUM_HAL_VIRTUAL_VECTOR_COMM_CHANNELS,
101
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122 "Invalid channel");
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123
103
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124 switch (__comm_id) {
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125 case CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT:
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126 if (__selected_id > 0)
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127 return __selected_id-1;
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128 if (__selected_id == 0)
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129 return CYGNUM_CALL_IF_SET_COMM_ID_MANGLER;
101
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130 return __selected_id;
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131
103
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132 case CYGNUM_CALL_IF_SET_COMM_ID_EMPTY:
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133 CYGACC_CALL_IF_DEBUG_PROCS_SET(0);
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134 __selected_id = __comm_id;
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135 return 1;
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136
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137 case CYGNUM_CALL_IF_SET_COMM_ID_MANGLER:
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138 __comm_id = 0;
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139 break;
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140
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141 default:
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142 __comm_id++; // skip mangler entry
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143 break;
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144 }
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145
101
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146 __selected_id = __comm_id;
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147
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148 CYGACC_CALL_IF_DEBUG_PROCS_SET(comm_channels[__comm_id]);
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149
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150 return 1;
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151 }
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152
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153 static int
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154 set_console_comm(int __comm_id)
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155 {
103
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156 static int __selected_id = CYGNUM_CALL_IF_SET_COMM_ID_EMPTY;
101
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157
103
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158 CYG_ASSERT(__comm_id >= CYGNUM_CALL_IF_SET_COMM_ID_MANGLER
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159 && __comm_id < CYGNUM_HAL_VIRTUAL_VECTOR_COMM_CHANNELS,
101
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160 "Invalid channel");
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161
103
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162 switch (__comm_id) {
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163 case CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT:
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164 if (__selected_id > 0)
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165 return __selected_id-1;
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166 if (__selected_id == 0)
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167 return CYGNUM_CALL_IF_SET_COMM_ID_MANGLER;
101
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168 return __selected_id;
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169
103
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170 case CYGNUM_CALL_IF_SET_COMM_ID_EMPTY:
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171 CYGACC_CALL_IF_CONSOLE_PROCS_SET(0);
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172 __selected_id = __comm_id;
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173 return 1;
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174
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175 case CYGNUM_CALL_IF_SET_COMM_ID_MANGLER:
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176 __comm_id = 0;
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177 break;
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178
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179 default:
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180 __comm_id++; // skip mangler entry
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181 break;
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182 }
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183
101
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184 __selected_id = __comm_id;
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185
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186 CYGACC_CALL_IF_CONSOLE_PROCS_SET(comm_channels[__comm_id]);
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187
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188 return 1;
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189 }
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190
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191 //----------------------------------
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192 // Cache functions
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193
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194 static void
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195 flush_icache(void *__p, int __nbytes)
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196 {
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197 #ifdef HAL_ICACHE_FLUSH
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198 HAL_ICACHE_FLUSH( __p , __nbytes );
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199 #elif defined(HAL_ICACHE_INVALIDATE)
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200 HAL_ICACHE_INVALIDATE();
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201 #endif
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202 }
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203
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204 static void
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205 flush_dcache(void *__p, int __nbytes)
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206 {
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207 #ifdef HAL_DCACHE_FLUSH
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208 HAL_DCACHE_FLUSH( __p , __nbytes );
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209 #elif defined(HAL_DCACHE_INVALIDATE)
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210 HAL_DCACHE_INVALIDATE();
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211 #endif
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212 }
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213
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214 #endif
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215
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216 #if defined(CYGSEM_HAL_VIRTUAL_VECTOR_DIAG)
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217 //-----------------------------------------------------------------------------
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218 // Console IO functions that adhere to the virtual vector table semantics in
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219 // order to ensure proper debug agent mangling when required.
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220 //
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221 // The platform HAL must specify the channel used, and provide raw IO
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222 // routines for that channel. The platform HAL also has the necessary
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223 // information to determine if the channel is already initialized by
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224 // a debug agent (either builtin or in ROM).
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225 void
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226 hal_if_diag_init(void)
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227 {
103
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228 #ifndef CYGSEM_HAL_VIRTUAL_VECTOR_DIAG
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229 cyg_hal_plf_comms_init();
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230 #endif
101
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231
103
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232 // Set console channel. This should only be done when the console channel
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233 // differs from the debug channel to prevent removing the debug agent's
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234 // mangler procs.
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235 if (CYGACC_CALL_IF_SET_DEBUG_COMM()(CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT)
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236 != CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL)
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237
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238 CYGACC_CALL_IF_SET_CONSOLE_COMM()(CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL);
101
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239 }
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240
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241 void
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242 hal_if_diag_write_char(char c)
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243 {
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244 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_CONSOLE_PROCS();
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245
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246 if (__chan)
103
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247 CYGACC_COMM_IF_PUTC(*__chan)(CYGACC_COMM_IF_CH_DATA(*__chan), c);
101
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248 else {
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249 __chan = CYGACC_CALL_IF_DEBUG_PROCS();
103
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250 CYGACC_COMM_IF_PUTC(*__chan)(CYGACC_COMM_IF_CH_DATA(*__chan), c);
101
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251 }
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252 }
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253
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254 void
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255 hal_if_diag_read_char(char *c)
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256 {
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257 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_CONSOLE_PROCS();
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258
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259 if (__chan)
103
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260 *c = CYGACC_COMM_IF_GETC(*__chan)(CYGACC_COMM_IF_CH_DATA(*__chan));
101
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261 else {
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262 __chan = CYGACC_CALL_IF_DEBUG_PROCS();
103
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263 *c = CYGACC_COMM_IF_GETC(*__chan)(CYGACC_COMM_IF_CH_DATA(*__chan));
101
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264 }
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265 }
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266 #endif // CYGSEM_HAL_VIRTUAL_VECTOR_DIAG
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267
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268 //--------------------------------------------------------------------------
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269 // Init function. It should be called from the platform initialization code.
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270 // For monitor configurations it will initialize the calling interface table,
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271 // for client configurations it will patch the existing table as per
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272 // configuration.
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273 void
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274 hal_if_init(void)
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275 {
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276 // Set up services provided by monitors
103
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277 #ifdef CYGPRI_HAL_IMPLEMENTS_IF_SERVICES
101
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278 {
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279 int i, j;
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280 // Initialize tables with the NOP service.
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281 // This should only be done for service routine entries - data
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282 // pointers should be NULLed.
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283 for (i = 0; i < CYGNUM_CALL_IF_TABLE_SIZE; i++)
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284 hal_virtual_vector_table[i] = (CYG_ADDRWORD) &nop_service;
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285
103
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286 for (j = 0; j < CYGNUM_HAL_VIRTUAL_VECTOR_COMM_CHANNELS+1; j++)
101
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287 for (i = 0; i < CYGNUM_COMM_IF_TABLE_SIZE; i++)
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288 comm_channels[j][i] = (CYG_ADDRWORD) &nop_service;
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289
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290
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291 // Fill in supported services.
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292
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293 // Version number
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294 CYGACC_CALL_IF_VERSION_SET(CYGNUM_CALL_IF_TABLE_VERSION);
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295
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296 // ICTRL and EXC tables - I assume these to be the equivalents of
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297 // ISR and VSR tables.
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298 CYGACC_CALL_IF_ICTRL_TABLE_SET(hal_interrupt_handlers);
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299 CYGACC_CALL_IF_EXC_TABLE_SET(hal_vsr_table);
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300
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301 // Reset and kill vector
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302 CYGACC_CALL_IF_RESET_SET(reset);
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303 CYGACC_CALL_IF_KILL_VECTOR_SET(kill_by_reset);
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304
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305 // Comm controls
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306 CYGACC_CALL_IF_SET_DEBUG_COMM_SET(set_debug_comm);
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307 CYGACC_CALL_IF_SET_CONSOLE_COMM_SET(set_console_comm);
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308
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309 // Cache functions
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310 CYGACC_CALL_IF_FLUSH_ICACHE_SET(flush_icache);
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311 CYGACC_CALL_IF_FLUSH_DCACHE_SET(flush_dcache);
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312
103
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313 // Clear console procs entry. If platform has been configured
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314 // to use a separate console port, it will be set up later
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315 // (hal_diag_init). Alternatively (if this is a stub) it will
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316 // be initialized with the output mangler (O-packetizer for
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317 // GDB) which uses the debug comms.
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318 set_console_comm(CYGNUM_CALL_IF_SET_COMM_ID_EMPTY);
101
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319
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320 // Data entries not currently supported in eCos
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321 CYGACC_CALL_IF_CPU_DATA_SET(0);
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322 CYGACC_CALL_IF_BOARD_DATA_SET(0);
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323 CYGACC_CALL_IF_DBG_DATA_SET(0);
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324 }
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325 #endif
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326
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327 // Set up services provided by clients
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328 #if defined(CYGFUN_HAL_COMMON_KERNEL_SUPPORT) && \
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329 ( defined(CYGSEM_HAL_USE_ROM_MONITOR_GDB_stubs) \
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330 || defined(CYGSEM_HAL_USE_ROM_MONITOR_CygMon))
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331
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332 patch_dbg_syscalls( (void *)(hal_virtual_vector_table) );
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333 #endif
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334
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335 // Init client services
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336 #if !defined(CYGPKG_KERNEL) && defined(CYGDBG_HAL_DEBUG_GDB_THREAD_SUPPORT)
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337 // Only include this code if we do not have a kernel. Otherwise
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338 // the kernel supplies the functionality for the app we are linked
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339 // with.
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340
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341 // Prepare for application installation of thread info function in
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342 // vector table.
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343 init_thread_syscall( (void *)&hal_virtual_vector_table[CYGNUM_CALL_IF_DBG_SYSCALL] );
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344 #endif
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345
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346 // Finally, install async breakpoint handler if it is configured in.
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347 // FIXME: this should probably check for STUBS instead (but code is
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348 // conditional on BREAK for now)
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349 #if defined(CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT)
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350 // Install async breakpoint handler into vector table.
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351 CYGACC_CALL_IF_INSTALL_BPT_FN_SET(&cyg_hal_gdb_interrupt);
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352 #endif
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353 }