Mercurial > ecos
annotate packages/hal/common/current/src/drv_api.c @ 2729:74dbf4c3f2e1 after-copyright-change-20090129
Update all copyright banners to reflect FSF ownership; fix and improve licence text.
| author | jlarmour |
|---|---|
| date | Thu, 29 Jan 2009 17:47:46 +0000 |
| parents | 10a36d0fd6f3 |
| children |
| rev | line source |
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| 2 | 1 //========================================================================== |
| 2 // | |
| 3 // drv_api.c | |
| 4 // | |
| 5 // Driver API for non-kernel configurations | |
| 6 // | |
| 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 Free Software Foundation, Inc. |
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12 // |
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13 // eCos is free software; you can redistribute it and/or modify it under |
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14 // the terms of the GNU General Public License as published by the Free |
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15 // Software Foundation; either version 2 or (at your option) any later |
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16 // version. |
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17 // |
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18 // eCos is distributed in the hope that it will be useful, but WITHOUT |
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19 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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20 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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21 // for more details. |
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22 // |
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23 // You should have received a copy of the GNU General Public License |
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24 // along with eCos; if not, write to the Free Software Foundation, Inc., |
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25 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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26 // |
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27 // As a special exception, if other files instantiate templates or use |
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28 // macros or inline functions from this file, or you compile this file |
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29 // and link it with other works to produce a work based on this file, |
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30 // this file does not by itself cause the resulting work to be covered by |
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31 // the GNU General Public License. However the source code for this file |
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32 // must still be made available in accordance with section (3) of the GNU |
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33 // General Public License v2. |
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34 // |
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35 // This exception does not invalidate any other reasons why a work based |
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36 // on this file might be covered by the GNU General Public License. |
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37 // ------------------------------------------- |
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38 // ####ECOSGPLCOPYRIGHTEND#### |
| 2 | 39 //========================================================================== |
| 40 //#####DESCRIPTIONBEGIN#### | |
| 41 // | |
| 42 // Author(s): Nick Garnett | |
| 43 // Date: 1999-02-24 | |
| 44 // Purpose: Driver API for non-kernel configurations | |
| 45 // Description: These functions are used to support drivers when the kernel | |
| 46 // is not present. | |
| 47 // | |
| 48 // | |
| 49 // | |
| 50 //####DESCRIPTIONEND#### | |
| 51 // | |
| 52 //========================================================================== | |
| 53 | |
| 54 #include <pkgconf/system.h> | |
| 55 | |
| 56 #ifndef CYGPKG_KERNEL | |
| 57 | |
| 58 #include <cyg/infra/cyg_type.h> | |
| 59 #include <cyg/infra/cyg_trac.h> | |
| 60 #include <cyg/infra/cyg_ass.h> | |
| 61 | |
| 62 #include <pkgconf/hal.h> | |
| 63 #include <cyg/hal/drv_api.h> | |
| 64 | |
| 65 #include <cyg/hal/hal_arch.h> | |
| 66 #include <cyg/hal/hal_intr.h> | |
| 67 | |
| 68 //-------------------------------------------------------------------------- | |
| 69 // Statics | |
| 70 | |
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71 static volatile cyg_int32 isr_disable_counter = 1; // ISR disable counter |
| 2 | 72 |
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73 static CYG_INTERRUPT_STATE isr_disable_state; |
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74 |
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75 volatile cyg_int32 dsr_disable_counter // DSR disable counter |
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76 CYGBLD_ATTRIB_ASM_ALIAS( cyg_scheduler_sched_lock ); |
| 2 | 77 |
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78 static cyg_interrupt* volatile dsr_list; // List of pending DSRs |
| 2 | 79 |
| 80 #ifdef CYGIMP_HAL_COMMON_INTERRUPTS_CHAIN | |
| 81 | |
| 82 cyg_interrupt *chain_list[CYGNUM_HAL_ISR_COUNT]; | |
| 83 | |
| 84 #endif | |
| 85 | |
| 86 //-------------------------------------------------------------------------- | |
| 87 // DSR handling functions. | |
| 88 // post_dsr() places a DSR on the list of DSRs to be called. | |
| 89 // call_dsrs() calls the DSRs. | |
| 90 | |
| 91 static void post_dsr( cyg_interrupt *intr ) | |
| 92 { | |
| 93 CYG_INTERRUPT_STATE old_intr; | |
| 94 | |
| 95 CYG_REPORT_FUNCTION(); | |
| 96 | |
| 97 HAL_DISABLE_INTERRUPTS(old_intr); | |
| 98 | |
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99 if( intr->dsr_count++ == 0 ) |
| 2 | 100 { |
| 101 intr->next_dsr = dsr_list; | |
| 102 dsr_list = intr; | |
| 103 } | |
| 104 | |
| 105 HAL_RESTORE_INTERRUPTS(old_intr); | |
| 106 | |
| 107 CYG_REPORT_RETURN(); | |
| 108 } | |
| 109 | |
| 110 static void call_dsrs(void) | |
| 111 { | |
| 112 CYG_REPORT_FUNCTION(); | |
| 113 | |
| 114 while( dsr_list != NULL ) | |
| 115 { | |
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116 cyg_interrupt *intr; |
| 2 | 117 cyg_int32 count; |
| 118 CYG_INTERRUPT_STATE old_intr; | |
| 119 | |
| 120 HAL_DISABLE_INTERRUPTS(old_intr); | |
| 121 | |
| 122 intr = dsr_list; | |
| 123 dsr_list = intr->next_dsr; | |
| 124 count = intr->dsr_count; | |
| 125 intr->dsr_count = 0; | |
| 126 | |
| 127 HAL_RESTORE_INTERRUPTS(old_intr); | |
| 128 | |
| 129 intr->dsr( intr->vector, count, (CYG_ADDRWORD)intr->data ); | |
| 130 } | |
| 131 | |
| 132 CYG_REPORT_RETURN(); | |
| 133 | |
| 134 } | |
| 135 | |
| 136 //-------------------------------------------------------------------------- | |
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137 // This is referenced from the HAL, although it does not actually get called. |
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138 |
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139 externC void |
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140 cyg_interrupt_call_pending_DSRs(void) |
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141 { |
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142 call_dsrs(); |
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143 } |
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144 |
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145 //-------------------------------------------------------------------------- |
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146 // This is called from springboard ISRs in some HALs. |
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147 |
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148 externC void |
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149 cyg_interrupt_post_dsr(CYG_ADDRWORD data) |
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150 { |
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151 cyg_interrupt * intr = (cyg_interrupt *)data; |
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152 post_dsr(intr); |
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153 } |
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154 |
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155 //-------------------------------------------------------------------------- |
| 2 | 156 // Interrupt end function called from HAL VSR to tidy up. This is where |
| 157 // DSRs will be called if necessary. | |
| 158 | |
| 159 externC void | |
| 160 interrupt_end( | |
| 161 cyg_uint32 isr_ret, | |
| 162 cyg_interrupt *intr, | |
| 163 HAL_SavedRegisters *regs | |
| 164 ) | |
| 165 { | |
| 166 CYG_REPORT_FUNCTION(); | |
| 167 | |
| 168 #ifndef CYGIMP_HAL_COMMON_INTERRUPTS_CHAIN | |
| 169 | |
| 170 // Only do this if we are in a non-chained configuration. | |
| 171 // If we are chained, then chain_isr will do the DSR | |
| 172 // posting. | |
| 173 | |
| 174 if( isr_ret & CYG_ISR_CALL_DSR && intr != NULL ) post_dsr(intr); | |
| 175 | |
| 176 #endif | |
| 177 | |
| 178 if( dsr_disable_counter == 0 ) call_dsrs(); | |
| 179 | |
| 180 CYG_REPORT_RETURN(); | |
| 181 } | |
| 182 | |
| 183 //-------------------------------------------------------------------------- | |
| 184 // ISR for handling chained interrupts. | |
| 185 | |
| 186 #ifdef CYGIMP_HAL_COMMON_INTERRUPTS_CHAIN | |
| 187 | |
| 188 cyg_uint32 chain_isr(cyg_vector_t vector, CYG_ADDRWORD data) | |
| 189 { | |
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190 cyg_interrupt *p = *(cyg_interrupt **)data; |
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191 register cyg_uint32 isr_ret = 0; |
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192 register cyg_uint32 isr_chain_ret = 0; |
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193 |
| 2 | 194 CYG_REPORT_FUNCTION(); |
| 195 | |
| 196 while( p != NULL ) | |
| 197 { | |
| 198 if( p->vector == vector ) | |
| 199 { | |
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200 isr_ret = p->isr(vector, p->data); |
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201 |
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202 isr_chain_ret |= isr_ret; |
| 2 | 203 |
| 204 if( isr_ret & CYG_ISR_CALL_DSR ) post_dsr(p); | |
| 205 | |
| 206 if( isr_ret & CYG_ISR_HANDLED ) break; | |
| 207 } | |
| 208 | |
| 209 p = p->next; | |
| 210 } | |
| 211 | |
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212 #ifdef HAL_DEFAULT_ISR |
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213 if( (isr_chain_ret & (CYG_ISR_CALL_DSR|CYG_ISR_HANDLED)) == 0 ) |
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214 { |
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215 // If we finished the loop for some reason other than that an |
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216 // ISR has handled the interrupt, call any default ISR to either |
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217 // report the spurious interrupt, or do some other HAL level processing |
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218 // such as GDB interrupt detection etc. |
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219 |
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220 HAL_DEFAULT_ISR( vector, 0 ); |
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221 } |
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222 #endif |
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223 |
| 2 | 224 CYG_REPORT_RETURN(); |
| 225 | |
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226 return isr_ret & CYG_ISR_CALL_DSR; |
| 2 | 227 } |
| 228 | |
| 229 #endif | |
| 230 | |
| 231 //-------------------------------------------------------------------------- | |
| 232 // ISR lock. This disables interrupts and keeps a count of the number | |
| 233 // times it has been called. | |
| 234 | |
| 235 externC void cyg_drv_isr_lock() | |
| 236 { | |
| 237 CYG_REPORT_FUNCTION(); | |
| 238 | |
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239 if( isr_disable_counter == 0 ) |
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240 HAL_DISABLE_INTERRUPTS(isr_disable_state); |
| 2 | 241 |
| 242 CYG_ASSERT( isr_disable_counter >= 0 , "Disable counter negative"); | |
| 243 | |
| 244 isr_disable_counter++; | |
| 245 | |
| 246 CYG_REPORT_RETURN(); | |
| 247 } | |
| 248 | |
| 249 //-------------------------------------------------------------------------- | |
| 250 // Unlock ISRs. This decrements the count and re-enables interrupts if it | |
| 251 // goes zero. | |
| 252 | |
| 253 externC void cyg_drv_isr_unlock() | |
| 254 { | |
| 255 CYG_REPORT_FUNCTION(); | |
| 256 | |
| 257 CYG_ASSERT( isr_disable_counter > 0 , "Disable counter not greater than zero"); | |
| 258 | |
| 259 isr_disable_counter--; | |
| 260 | |
| 261 if ( isr_disable_counter == 0 ) | |
| 262 { | |
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263 HAL_RESTORE_INTERRUPTS(isr_disable_state); |
| 2 | 264 } |
| 265 | |
| 266 CYG_REPORT_RETURN(); | |
| 267 } | |
| 268 | |
| 269 //-------------------------------------------------------------------------- | |
| 270 // Lock DSR lock. Simply increment the counter. | |
| 271 | |
| 272 externC void cyg_drv_dsr_lock() | |
| 273 { | |
| 274 CYG_REPORT_FUNCTION(); | |
| 275 | |
| 276 dsr_disable_counter++; | |
| 277 | |
| 278 CYG_REPORT_RETURN(); | |
| 279 } | |
| 280 | |
| 281 //-------------------------------------------------------------------------- | |
| 282 // Unlock DSR lock. If the counter is about to go zero, call any pending | |
| 283 // DSRs and then zero the counter. | |
| 284 | |
| 285 externC void cyg_drv_dsr_unlock() | |
| 286 { | |
| 287 CYG_REPORT_FUNCTION(); | |
| 288 | |
| 289 do | |
| 290 { | |
| 291 if( dsr_disable_counter == 1 ) | |
| 292 { | |
| 293 call_dsrs(); | |
| 294 } | |
| 295 | |
| 296 HAL_REORDER_BARRIER(); | |
| 297 | |
| 298 dsr_disable_counter = 0; | |
| 299 | |
| 300 HAL_REORDER_BARRIER(); | |
| 301 | |
| 302 // Check that no DSRs have been posted between calling | |
| 303 // call_dsrs() and zeroing dsr_disable_counter. If so, | |
| 304 // loop back and call them. | |
| 305 | |
| 306 if( dsr_list != NULL ) | |
| 307 { | |
| 308 dsr_disable_counter = 1; | |
| 309 continue; | |
| 310 } | |
| 311 | |
| 312 CYG_REPORT_RETURN(); | |
| 313 | |
| 314 return; | |
| 315 | |
| 316 } while(1); | |
| 317 | |
| 318 CYG_FAIL( "Should not be executed" ); | |
| 319 } | |
| 320 | |
| 321 //-------------------------------------------------------------------------- | |
| 322 // Initialize a mutex. | |
| 323 | |
| 324 externC void cyg_drv_mutex_init( cyg_drv_mutex_t *mutex ) | |
| 325 { | |
| 326 CYG_REPORT_FUNCTION(); | |
| 327 | |
| 328 mutex->lock = 0; | |
| 329 | |
| 330 CYG_REPORT_RETURN(); | |
| 331 } | |
| 332 | |
| 333 //-------------------------------------------------------------------------- | |
| 334 // Destroy a mutex. | |
| 335 | |
| 336 externC void cyg_drv_mutex_destroy( cyg_drv_mutex_t *mutex ) | |
| 337 { | |
| 338 CYG_REPORT_FUNCTION(); | |
| 339 | |
| 340 mutex->lock = -1; | |
| 341 | |
| 342 CYG_REPORT_RETURN(); | |
| 343 } | |
| 344 | |
| 345 //-------------------------------------------------------------------------- | |
| 346 // Lock a mutex. We check that we are not trying to lock a locked or | |
| 347 // destroyed mutex and if not, set it locked. | |
| 348 | |
| 349 externC cyg_bool_t cyg_drv_mutex_lock( cyg_drv_mutex_t *mutex ) | |
| 350 { | |
| 351 CYG_REPORT_FUNCTION(); | |
| 352 | |
| 353 CYG_ASSERT( mutex->lock == 0 , "Trying to lock locked mutex"); | |
| 354 | |
| 355 mutex->lock = 1; | |
| 356 | |
| 357 CYG_REPORT_RETURN(); | |
| 358 | |
| 359 return true; | |
| 360 } | |
| 361 | |
| 362 //-------------------------------------------------------------------------- | |
| 363 // Attempt to claim a mutex, and return if it cannot be. | |
| 364 | |
| 365 externC cyg_bool_t cyg_drv_mutex_trylock( cyg_drv_mutex_t *mutex ) | |
| 366 { | |
| 367 cyg_bool_t result = true; | |
| 368 | |
| 369 CYG_REPORT_FUNCTION(); | |
| 370 | |
| 371 if( mutex->lock == 1 ) result = false; | |
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373 mutex->lock = 1; |
| 2 | 374 |
| 375 CYG_REPORT_RETURN(); | |
| 376 | |
| 377 return result; | |
| 378 } | |
| 379 | |
| 380 //-------------------------------------------------------------------------- | |
| 381 // Unlock a mutex. We check that the mutex is actually locked before doing | |
| 382 // this. | |
| 383 | |
| 384 externC void cyg_drv_mutex_unlock( cyg_drv_mutex_t *mutex ) | |
| 385 { | |
| 386 CYG_REPORT_FUNCTION(); | |
| 387 | |
| 388 CYG_ASSERT( mutex->lock == 1 , "Trying to unlock unlocked mutex"); | |
| 389 | |
| 390 mutex->lock = 0; | |
| 391 | |
| 392 CYG_REPORT_RETURN(); | |
| 393 } | |
| 394 | |
| 395 //-------------------------------------------------------------------------- | |
| 396 // Release all threads waiting for the mutex. | |
| 397 // This is really for threads, so we do nothing here. | |
| 398 | |
| 399 externC void cyg_drv_mutex_release( cyg_drv_mutex_t *mutex ) | |
| 400 { | |
| 401 CYG_REPORT_FUNCTION(); | |
| 402 | |
| 403 | |
| 404 | |
| 405 CYG_REPORT_RETURN(); | |
| 406 } | |
| 407 | |
| 408 | |
| 409 //-------------------------------------------------------------------------- | |
| 410 // Initialized a condition variable. | |
| 411 | |
| 412 externC void cyg_drv_cond_init( cyg_drv_cond_t *cond, cyg_drv_mutex_t *mutex ) | |
| 413 { | |
| 414 CYG_REPORT_FUNCTION(); | |
| 415 | |
| 416 cond->wait = 0; | |
| 417 cond->mutex = mutex; | |
| 418 | |
| 419 CYG_REPORT_RETURN(); | |
| 420 } | |
| 421 | |
| 422 | |
| 423 //-------------------------------------------------------------------------- | |
| 424 // Destroy a condition variable. | |
| 425 | |
| 426 externC void cyg_drv_cond_destroy( cyg_drv_cond_t *cond ) | |
| 427 { | |
| 428 CYG_REPORT_FUNCTION(); | |
| 429 | |
| 430 cond->wait = -1; | |
| 431 cond->mutex = NULL; | |
| 432 | |
| 433 CYG_REPORT_RETURN(); | |
| 434 } | |
| 435 | |
| 436 // ------------------------------------------------------------------------- | |
| 437 // Wait for a condition variable to be signalled. We simply busy wait | |
| 438 // polling the condition variable's wait member until a DSR sets it to | |
| 439 // 0. Note that the semantics of condition variables means that the | |
| 440 // wakeup only happens if there is a thread actually waiting on the CV | |
| 441 // when the signal is sent. | |
| 442 | |
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443 externC cyg_bool cyg_drv_cond_wait( cyg_drv_cond_t *cond ) |
| 2 | 444 { |
| 445 CYG_REPORT_FUNCTION(); | |
| 446 | |
| 447 CYG_ASSERT( cond->mutex != NULL, "Uninitialized condition variable"); | |
| 448 CYG_ASSERT( cond->mutex->lock, "Mutex not locked"); | |
| 449 | |
| 450 cyg_drv_dsr_lock(); | |
| 451 | |
| 452 cond->wait = 1; | |
| 453 | |
| 454 while( cond->wait == 1 ) | |
| 455 { | |
| 456 // While looping we call call_dsrs() to service any DSRs that | |
| 457 // get posted. One of these will make the call to cond_signal | |
| 458 // to break us out of this loop. If we do not have the DSR | |
| 459 // lock claimed, then a race condition could occur and keep us | |
| 460 // stuck here forever. | |
| 461 | |
| 462 call_dsrs(); | |
| 463 } | |
| 464 | |
| 465 cyg_drv_dsr_unlock(); | |
| 466 | |
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467 CYG_REPORT_RETURN(); |
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468 |
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469 return true; |
| 2 | 470 } |
| 471 | |
| 472 //-------------------------------------------------------------------------- | |
| 473 // Signal a condition variable. This sets the wait member to zero, which | |
| 474 // has no effect when there is no waiter, but will wake up any waiting | |
| 475 // thread. | |
| 476 | |
| 477 externC void cyg_drv_cond_signal( cyg_drv_cond_t *cond ) | |
| 478 { | |
| 479 CYG_REPORT_FUNCTION(); | |
| 480 | |
| 481 cond->wait = 0; | |
| 482 | |
| 483 CYG_REPORT_RETURN(); | |
| 484 } | |
| 485 | |
| 486 | |
| 487 //-------------------------------------------------------------------------- | |
| 488 // Broadcast to condition variable. This is exactly the same a signal since | |
| 489 // there can only be one waiter. | |
| 490 | |
| 491 externC void cyg_drv_cond_broadcast( cyg_drv_cond_t *cond ) | |
| 492 { | |
| 493 CYG_REPORT_FUNCTION(); | |
| 494 | |
| 495 cond->wait = 0; | |
| 496 | |
| 497 CYG_REPORT_RETURN(); | |
| 498 } | |
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499 |
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500 //-------------------------------------------------------------------------- |
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501 // Spinlock support. |
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502 // Since we can only support a single CPU in this version of the API, we only |
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503 // set and clear the lock variable to keep track of what's happening. |
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504 |
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505 void cyg_drv_spinlock_init( |
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506 cyg_drv_spinlock_t *lock, /* spinlock to initialize */ |
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507 cyg_bool_t locked /* init locked or unlocked */ |
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508 ) |
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509 { |
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510 CYG_REPORT_FUNCTION(); |
| 2 | 511 |
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512 lock->lock = locked; |
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513 |
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514 CYG_REPORT_RETURN(); |
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515 } |
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516 |
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517 void cyg_drv_spinlock_destroy( cyg_drv_spinlock_t *lock ) |
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518 { |
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519 CYG_REPORT_FUNCTION(); |
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520 |
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521 lock->lock = -1; |
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522 |
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523 CYG_REPORT_RETURN(); |
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524 } |
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525 |
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526 void cyg_drv_spinlock_spin( cyg_drv_spinlock_t *lock ) |
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527 { |
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528 CYG_REPORT_FUNCTION(); |
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529 |
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530 CYG_ASSERT( lock->lock == 0 , "Trying to lock locked spinlock"); |
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531 |
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532 lock->lock = 1; |
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533 |
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534 CYG_REPORT_RETURN(); |
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535 } |
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536 |
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537 void cyg_drv_spinlock_clear( cyg_drv_spinlock_t *lock ) |
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538 { |
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539 CYG_REPORT_FUNCTION(); |
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540 |
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541 CYG_ASSERT( lock->lock == 1 , "Trying to clear cleared spinlock"); |
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542 |
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543 lock->lock = 0; |
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544 |
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545 CYG_REPORT_RETURN(); |
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546 } |
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547 |
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548 cyg_bool_t cyg_drv_spinlock_try( cyg_drv_spinlock_t *lock ) |
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549 { |
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550 cyg_bool_t result = true; |
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551 |
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552 CYG_REPORT_FUNCTION(); |
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553 |
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554 if( lock->lock == 1 ) result = false; |
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555 |
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556 lock->lock = 1; |
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557 |
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558 CYG_REPORT_RETURN(); |
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559 |
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560 return result; |
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561 } |
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562 |
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563 cyg_bool_t cyg_drv_spinlock_test( cyg_drv_spinlock_t *lock ) |
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564 { |
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565 cyg_bool_t result = true; |
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566 |
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567 CYG_REPORT_FUNCTION(); |
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568 |
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569 if( lock->lock == 1 ) result = false; |
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570 |
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571 CYG_REPORT_RETURN(); |
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572 |
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573 return result; |
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574 } |
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575 |
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576 void cyg_drv_spinlock_spin_intsave( cyg_drv_spinlock_t *lock, |
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577 cyg_addrword_t *istate ) |
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578 { |
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579 CYG_REPORT_FUNCTION(); |
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580 |
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581 HAL_DISABLE_INTERRUPTS( *istate ); |
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582 |
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583 lock->lock = 1; |
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584 |
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585 CYG_REPORT_RETURN(); |
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586 } |
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587 |
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588 |
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589 void cyg_drv_spinlock_clear_intsave( cyg_drv_spinlock_t *lock, |
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590 cyg_addrword_t istate ) |
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591 { |
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592 CYG_REPORT_FUNCTION(); |
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593 |
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594 lock->lock = 0; |
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595 |
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596 HAL_RESTORE_INTERRUPTS( istate ); |
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597 |
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598 CYG_REPORT_RETURN(); |
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599 } |
| 2 | 600 |
| 601 //-------------------------------------------------------------------------- | |
| 602 // Create an interrupt object. | |
| 603 | |
| 604 externC void cyg_drv_interrupt_create( | |
| 605 cyg_vector_t vector, | |
| 606 cyg_priority_t priority, | |
| 607 cyg_addrword_t data, | |
| 608 cyg_ISR_t *isr, | |
| 609 cyg_DSR_t *dsr, | |
| 610 cyg_handle_t *handle, | |
| 611 cyg_interrupt *intr | |
| 612 ) | |
| 613 { | |
| 614 CYG_REPORT_FUNCTION(); | |
| 615 | |
| 616 intr->vector = vector; | |
| 617 intr->priority = priority; | |
| 618 intr->isr = isr; | |
| 619 intr->dsr = dsr; | |
| 620 intr->data = data; | |
| 621 intr->next_dsr = NULL; | |
| 622 intr->dsr_count = 0; | |
| 623 | |
| 624 #ifdef CYGIMP_HAL_COMMON_INTERRUPTS_CHAIN | |
| 625 | |
| 626 intr->next = NULL; | |
| 627 | |
| 628 #endif | |
| 629 | |
| 630 *handle = (cyg_handle_t)intr; | |
| 631 | |
| 632 CYG_REPORT_RETURN(); | |
| 633 } | |
| 634 | |
| 635 //-------------------------------------------------------------------------- | |
| 636 // Delete an interrupt object. This merely ensures that it is detached from | |
| 637 // the vector. | |
| 638 | |
| 639 externC void cyg_drv_interrupt_delete( cyg_handle_t interrupt ) | |
| 640 { | |
| 641 CYG_REPORT_FUNCTION(); | |
| 642 | |
| 643 cyg_drv_interrupt_detach( interrupt ); | |
| 644 | |
| 645 CYG_REPORT_RETURN(); | |
| 646 } | |
| 647 | |
| 648 //-------------------------------------------------------------------------- | |
| 649 // | |
| 650 | |
| 651 externC void cyg_drv_interrupt_attach( cyg_handle_t interrupt ) | |
| 652 { | |
| 653 cyg_interrupt *intr = (cyg_interrupt *)interrupt; | |
| 654 | |
| 655 CYG_REPORT_FUNCTION(); | |
| 656 | |
| 657 CYG_ASSERT( intr->vector >= CYGNUM_HAL_ISR_MIN, "Invalid vector"); | |
| 658 CYG_ASSERT( intr->vector <= CYGNUM_HAL_ISR_MAX, "Invalid vector"); | |
| 659 | |
| 660 HAL_INTERRUPT_SET_LEVEL( intr->vector, intr->priority ); | |
| 661 | |
| 662 #ifdef CYGIMP_HAL_COMMON_INTERRUPTS_CHAIN | |
| 663 | |
| 664 CYG_ASSERT( intr->next == NULL , "cyg_interrupt already on a list"); | |
| 665 | |
|
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666 { |
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667 cyg_uint32 index; |
| 2 | 668 |
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669 HAL_TRANSLATE_VECTOR( intr->vector, index ); |
| 2 | 670 |
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671 if( chain_list[index] == NULL ) |
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672 { |
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673 // First Interrupt on this chain, just assign it and |
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674 // register the chain_isr with the HAL. |
| 2 | 675 |
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676 chain_list[index] = intr; |
| 2 | 677 |
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678 HAL_INTERRUPT_ATTACH( intr->vector, chain_isr, |
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679 &chain_list[index], NULL ); |
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680 } |
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681 else |
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682 { |
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683 // There are already interrupts chained, add this one into |
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684 // the chain in priority order. |
| 2 | 685 |
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686 cyg_interrupt **p = &chain_list[index]; |
| 2 | 687 |
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688 while( *p != NULL ) |
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689 { |
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690 cyg_interrupt *n = *p; |
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691 |
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692 if( n->priority < intr->priority ) break; |
| 2 | 693 |
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694 p = &n->next; |
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695 } |
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696 intr->next = *p; |
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697 *p = intr; |
| 2 | 698 } |
| 699 } | |
| 700 | |
| 701 #else | |
| 702 | |
| 703 HAL_INTERRUPT_ATTACH( intr->vector, intr->isr, intr->data, intr ); | |
| 704 | |
| 705 #endif | |
| 706 | |
| 707 CYG_REPORT_RETURN(); | |
| 708 } | |
| 709 | |
| 710 | |
| 711 //-------------------------------------------------------------------------- | |
| 712 // Detach an interrupt from its vector. | |
| 713 | |
| 714 externC void cyg_drv_interrupt_detach( cyg_handle_t interrupt ) | |
| 715 { | |
| 716 cyg_interrupt *intr = (cyg_interrupt *)interrupt; | |
| 717 | |
| 718 CYG_REPORT_FUNCTION(); | |
| 719 | |
| 720 CYG_ASSERT( intr->vector >= CYGNUM_HAL_ISR_MIN, "Invalid vector"); | |
| 721 CYG_ASSERT( intr->vector <= CYGNUM_HAL_ISR_MAX, "Invalid vector"); | |
| 722 | |
| 723 #ifdef CYGIMP_HAL_COMMON_INTERRUPTS_CHAIN | |
| 724 | |
| 725 // Remove the interrupt object from the vector chain. | |
| 726 | |
|
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727 { |
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728 cyg_uint32 index; |
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729 cyg_interrupt **p; |
| 2 | 730 |
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731 HAL_TRANSLATE_VECTOR( intr->vector, index ); |
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732 |
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733 p = &chain_list[index]; |
| 2 | 734 |
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735 while( *p != NULL ) |
| 2 | 736 { |
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737 cyg_interrupt *n = *p; |
| 2 | 738 |
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739 if( n == intr ) |
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740 { |
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741 *p = intr->next; |
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742 break; |
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743 } |
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744 |
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745 p = &n->next; |
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746 } |
| 2 | 747 |
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748 // If this was the last one, detach the vector. |
| 2 | 749 |
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750 if( chain_list[index] == NULL ) |
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751 HAL_INTERRUPT_DETACH( intr->vector, chain_isr ); |
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752 } |
| 2 | 753 |
| 754 #else | |
| 755 | |
| 756 HAL_INTERRUPT_DETACH( intr->vector, intr->isr ); | |
| 757 | |
| 758 #endif | |
| 759 | |
| 760 CYG_REPORT_RETURN(); | |
| 761 } | |
| 762 | |
| 763 | |
| 764 //-------------------------------------------------------------------------- | |
| 765 // Mask delivery of an interrupt at the interrupt controller. | |
|
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766 // (Interrupt safe) |
| 2 | 767 |
| 768 externC void cyg_drv_interrupt_mask( cyg_vector_t vector ) | |
| 769 { | |
|
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770 CYG_INTERRUPT_STATE old_ints; |
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771 |
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772 CYG_REPORT_FUNCTION(); |
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773 CYG_REPORT_FUNCARG1("vector=%d", vector); |
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774 |
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775 CYG_ASSERT( vector >= CYGNUM_HAL_ISR_MIN, "Invalid vector"); |
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776 CYG_ASSERT( vector <= CYGNUM_HAL_ISR_MAX, "Invalid vector"); |
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777 |
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778 HAL_DISABLE_INTERRUPTS(old_ints); |
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779 HAL_INTERRUPT_MASK( vector ); |
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780 HAL_RESTORE_INTERRUPTS(old_ints); |
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781 |
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782 CYG_REPORT_RETURN(); |
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783 } |
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784 |
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785 //-------------------------------------------------------------------------- |
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786 // Mask delivery of an interrupt at the interrupt controller. |
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787 // (Not interrupt safe) |
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788 |
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789 externC void cyg_drv_interrupt_mask_intunsafe( cyg_vector_t vector ) |
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790 { |
| 2 | 791 CYG_REPORT_FUNCTION(); |
| 792 CYG_REPORT_FUNCARG1("vector=%d", vector); | |
| 793 | |
| 794 CYG_ASSERT( vector >= CYGNUM_HAL_ISR_MIN, "Invalid vector"); | |
| 795 CYG_ASSERT( vector <= CYGNUM_HAL_ISR_MAX, "Invalid vector"); | |
| 796 | |
| 797 HAL_INTERRUPT_MASK( vector ); | |
| 798 | |
| 799 CYG_REPORT_RETURN(); | |
| 800 } | |
| 801 | |
| 802 //-------------------------------------------------------------------------- | |
| 803 // Unmask delivery of an interrupt at the interrupt controller. | |
|
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804 // (Interrupt safe) |
| 2 | 805 |
| 806 externC void cyg_drv_interrupt_unmask( cyg_vector_t vector ) | |
| 807 { | |
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808 CYG_INTERRUPT_STATE old_ints; |
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809 |
| 2 | 810 CYG_REPORT_FUNCTION(); |
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811 CYG_REPORT_FUNCARG1("vector=%d", vector); |
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812 |
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813 CYG_ASSERT( vector >= CYGNUM_HAL_ISR_MIN, "Invalid vector"); |
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814 CYG_ASSERT( vector <= CYGNUM_HAL_ISR_MAX, "Invalid vector"); |
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815 |
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816 HAL_DISABLE_INTERRUPTS(old_ints); |
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817 HAL_INTERRUPT_UNMASK( vector ); |
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818 HAL_RESTORE_INTERRUPTS(old_ints); |
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819 |
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820 CYG_REPORT_RETURN(); |
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821 } |
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822 |
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823 //-------------------------------------------------------------------------- |
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824 // Unmask delivery of an interrupt at the interrupt controller. |
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825 // (Not interrupt safe) |
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826 |
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827 externC void cyg_drv_interrupt_unmask_intunsafe( cyg_vector_t vector ) |
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828 { |
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829 CYG_REPORT_FUNCTION(); |
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830 CYG_REPORT_FUNCARG1("vector=%d", vector); |
| 2 | 831 |
| 832 CYG_ASSERT( vector >= CYGNUM_HAL_ISR_MIN, "Invalid vector"); | |
| 833 CYG_ASSERT( vector <= CYGNUM_HAL_ISR_MAX, "Invalid vector"); | |
| 834 | |
| 835 HAL_INTERRUPT_UNMASK( vector ); | |
| 836 | |
| 837 CYG_REPORT_RETURN(); | |
| 838 } | |
| 839 | |
| 840 //-------------------------------------------------------------------------- | |
| 841 // Acknowledge an interrupt at the controller to allow another interrupt | |
| 842 // to be delivered. | |
| 843 | |
| 844 externC void cyg_drv_interrupt_acknowledge( cyg_vector_t vector ) | |
| 845 { | |
| 846 // CYG_REPORT_FUNCTION(); | |
| 847 | |
| 848 CYG_ASSERT( vector >= CYGNUM_HAL_ISR_MIN, "Invalid vector"); | |
| 849 CYG_ASSERT( vector <= CYGNUM_HAL_ISR_MAX, "Invalid vector"); | |
| 850 | |
| 851 HAL_INTERRUPT_ACKNOWLEDGE( vector ); | |
| 852 | |
| 853 // CYG_REPORT_RETURN(); | |
| 854 } | |
| 855 | |
| 856 //-------------------------------------------------------------------------- | |
| 857 // Configure interrupt detection parameters. | |
| 858 | |
| 859 externC void cyg_drv_interrupt_configure( | |
| 860 cyg_vector_t vector, | |
| 861 cyg_bool_t level, | |
| 862 cyg_bool_t up | |
| 863 ) | |
| 864 { | |
| 865 CYG_REPORT_FUNCTION(); | |
| 866 CYG_REPORT_FUNCARG3("vector = %d, level = %d, up = %d", vector, level, | |
| 867 up); | |
| 868 | |
| 869 CYG_ASSERT( vector >= CYGNUM_HAL_ISR_MIN, "Invalid vector"); | |
| 870 CYG_ASSERT( vector <= CYGNUM_HAL_ISR_MAX, "Invalid vector"); | |
| 871 | |
| 872 HAL_INTERRUPT_CONFIGURE( vector, level, up ); | |
| 873 | |
| 874 CYG_REPORT_RETURN(); | |
| 875 } | |
| 876 | |
| 877 //-------------------------------------------------------------------------- | |
| 878 // Configure interrupt priority level. | |
| 879 | |
| 880 externC void cyg_drv_interrupt_level( cyg_vector_t vector, cyg_priority_t level ) | |
| 881 { | |
| 882 CYG_REPORT_FUNCTION(); | |
| 883 CYG_REPORT_FUNCARG2("vector = %d, level = %d", vector, level); | |
| 884 | |
| 885 CYG_ASSERT( vector >= CYGNUM_HAL_ISR_MIN, "Invalid vector"); | |
| 886 CYG_ASSERT( vector <= CYGNUM_HAL_ISR_MAX, "Invalid vector"); | |
| 887 | |
| 888 HAL_INTERRUPT_SET_LEVEL( vector, level ); | |
| 889 | |
| 890 CYG_REPORT_RETURN(); | |
| 891 } | |
| 892 | |
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893 // ------------------------------------------------------------------------- |
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894 // CPU interrupt routing |
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895 |
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896 externC void cyg_drv_interrupt_set_cpu( cyg_vector_t vector, cyg_cpu_t cpu ) |
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897 { |
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898 CYG_REPORT_FUNCTION(); |
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899 CYG_REPORT_FUNCARG2("vector = %d, cpu = %d", vector, cpu); |
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900 |
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901 CYG_ASSERT( vector >= CYGNUM_HAL_ISR_MIN, "Invalid vector"); |
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902 CYG_ASSERT( vector <= CYGNUM_HAL_ISR_MAX, "Invalid vector"); |
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903 |
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904 #ifdef CYGPKG_HAL_SMP_SUPPORT |
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905 HAL_INTERRUPT_SET_CPU( vector, cpu ); |
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906 #endif |
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907 |
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908 CYG_REPORT_RETURN(); |
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909 } |
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910 |
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911 externC cyg_cpu_t cyg_drv_interrupt_get_cpu( cyg_vector_t vector ) |
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912 { |
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913 cyg_cpu_t cpu = 0; |
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914 |
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915 CYG_REPORT_FUNCTION(); |
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916 CYG_REPORT_FUNCARG1("vector = %d", vector); |
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917 |
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918 CYG_ASSERT( vector >= CYGNUM_HAL_ISR_MIN, "Invalid vector"); |
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919 CYG_ASSERT( vector <= CYGNUM_HAL_ISR_MAX, "Invalid vector"); |
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920 |
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921 #ifdef CYGPKG_HAL_SMP_SUPPORT |
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922 HAL_INTERRUPT_GET_CPU( vector, cpu ); |
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923 #endif |
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924 |
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925 CYG_REPORT_RETURN(); |
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926 |
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927 return cpu; |
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928 } |
| 2 | 929 |
| 930 // ------------------------------------------------------------------------- | |
| 931 // Exception delivery function called from the HAL as a result of a | |
| 932 // hardware exception being raised. | |
| 933 | |
| 934 externC void cyg_hal_deliver_exception( CYG_WORD code, CYG_ADDRWORD data ) | |
| 935 { | |
| 936 CYG_FAIL(" !!! Exception !!! "); | |
| 937 } | |
| 938 | |
| 939 | |
| 940 #endif | |
| 941 | |
| 942 //-------------------------------------------------------------------------- | |
| 943 // EOF drv_api.c |