Mercurial > ecos
annotate packages/hal/common/current/src/drv_api.c @ 1158:10a36d0fd6f3
* src/drv_api.c: Added definition of cyg_interrupt_post_dsr() for
use in those HALs that need it.
* include/hal_arbiter.h (hal_call_isr): Removed ifdef on
CYGFUN_HAL_COMMON_KERNEL_SUPPORT around test and call to
cyg_interrupt_post_dsr().
| author | nickg |
|---|---|
| date | Wed, 06 Aug 2003 17:32:30 +0000 |
| parents | d2c90368aeef |
| children | 74dbf4c3f2e1 |
| rev | line source |
|---|---|
| 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 Red Hat, 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 version. |
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16 // |
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17 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY |
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18 // WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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20 // for more details. |
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21 // |
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22 // You should have received a copy of the GNU General Public License along |
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23 // with eCos; if not, write to the Free Software Foundation, Inc., |
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24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
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25 // |
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26 // As a special exception, if other files instantiate templates or use macros |
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27 // or inline functions from this file, or you compile this file and link it |
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28 // with other works to produce a work based on this file, this file does not |
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29 // by itself cause the resulting work to be covered by the GNU General Public |
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30 // License. However the source code for this file must still be made available |
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31 // in accordance with section (3) of the GNU General Public License. |
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32 // |
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33 // This exception does not invalidate any other reasons why a work based on |
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34 // this file might be covered by the GNU General Public License. |
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35 // |
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36 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc. |
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37 // at http://sources.redhat.com/ecos/ecos-license/ |
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38 // ------------------------------------------- |
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39 //####ECOSGPLCOPYRIGHTEND#### |
| 2 | 40 //========================================================================== |
| 41 //#####DESCRIPTIONBEGIN#### | |
| 42 // | |
| 43 // Author(s): Nick Garnett | |
| 44 // Date: 1999-02-24 | |
| 45 // Purpose: Driver API for non-kernel configurations | |
| 46 // Description: These functions are used to support drivers when the kernel | |
| 47 // is not present. | |
| 48 // | |
| 49 // | |
| 50 // | |
| 51 //####DESCRIPTIONEND#### | |
| 52 // | |
| 53 //========================================================================== | |
| 54 | |
| 55 #include <pkgconf/system.h> | |
| 56 | |
| 57 #ifndef CYGPKG_KERNEL | |
| 58 | |
| 59 #include <cyg/infra/cyg_type.h> | |
| 60 #include <cyg/infra/cyg_trac.h> | |
| 61 #include <cyg/infra/cyg_ass.h> | |
| 62 | |
| 63 #include <pkgconf/hal.h> | |
| 64 #include <cyg/hal/drv_api.h> | |
| 65 | |
| 66 #include <cyg/hal/hal_arch.h> | |
| 67 #include <cyg/hal/hal_intr.h> | |
| 68 | |
| 69 //-------------------------------------------------------------------------- | |
| 70 // Statics | |
| 71 | |
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72 static volatile cyg_int32 isr_disable_counter = 1; // ISR disable counter |
| 2 | 73 |
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74 static CYG_INTERRUPT_STATE isr_disable_state; |
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75 |
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76 volatile cyg_int32 dsr_disable_counter // DSR disable counter |
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77 CYGBLD_ATTRIB_ASM_ALIAS( cyg_scheduler_sched_lock ); |
| 2 | 78 |
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79 static cyg_interrupt* volatile dsr_list; // List of pending DSRs |
| 2 | 80 |
| 81 #ifdef CYGIMP_HAL_COMMON_INTERRUPTS_CHAIN | |
| 82 | |
| 83 cyg_interrupt *chain_list[CYGNUM_HAL_ISR_COUNT]; | |
| 84 | |
| 85 #endif | |
| 86 | |
| 87 //-------------------------------------------------------------------------- | |
| 88 // DSR handling functions. | |
| 89 // post_dsr() places a DSR on the list of DSRs to be called. | |
| 90 // call_dsrs() calls the DSRs. | |
| 91 | |
| 92 static void post_dsr( cyg_interrupt *intr ) | |
| 93 { | |
| 94 CYG_INTERRUPT_STATE old_intr; | |
| 95 | |
| 96 CYG_REPORT_FUNCTION(); | |
| 97 | |
| 98 HAL_DISABLE_INTERRUPTS(old_intr); | |
| 99 | |
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100 if( intr->dsr_count++ == 0 ) |
| 2 | 101 { |
| 102 intr->next_dsr = dsr_list; | |
| 103 dsr_list = intr; | |
| 104 } | |
| 105 | |
| 106 HAL_RESTORE_INTERRUPTS(old_intr); | |
| 107 | |
| 108 CYG_REPORT_RETURN(); | |
| 109 } | |
| 110 | |
| 111 static void call_dsrs(void) | |
| 112 { | |
| 113 CYG_REPORT_FUNCTION(); | |
| 114 | |
| 115 while( dsr_list != NULL ) | |
| 116 { | |
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117 cyg_interrupt *intr; |
| 2 | 118 cyg_int32 count; |
| 119 CYG_INTERRUPT_STATE old_intr; | |
| 120 | |
| 121 HAL_DISABLE_INTERRUPTS(old_intr); | |
| 122 | |
| 123 intr = dsr_list; | |
| 124 dsr_list = intr->next_dsr; | |
| 125 count = intr->dsr_count; | |
| 126 intr->dsr_count = 0; | |
| 127 | |
| 128 HAL_RESTORE_INTERRUPTS(old_intr); | |
| 129 | |
| 130 intr->dsr( intr->vector, count, (CYG_ADDRWORD)intr->data ); | |
| 131 } | |
| 132 | |
| 133 CYG_REPORT_RETURN(); | |
| 134 | |
| 135 } | |
| 136 | |
| 137 //-------------------------------------------------------------------------- | |
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138 // This is referenced from the HAL, although it does not actually get called. |
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139 |
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140 externC void |
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141 cyg_interrupt_call_pending_DSRs(void) |
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142 { |
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143 call_dsrs(); |
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144 } |
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145 |
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146 //-------------------------------------------------------------------------- |
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147 // This is called from springboard ISRs in some HALs. |
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148 |
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149 externC void |
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150 cyg_interrupt_post_dsr(CYG_ADDRWORD data) |
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151 { |
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152 cyg_interrupt * intr = (cyg_interrupt *)data; |
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153 post_dsr(intr); |
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154 } |
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155 |
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156 //-------------------------------------------------------------------------- |
| 2 | 157 // Interrupt end function called from HAL VSR to tidy up. This is where |
| 158 // DSRs will be called if necessary. | |
| 159 | |
| 160 externC void | |
| 161 interrupt_end( | |
| 162 cyg_uint32 isr_ret, | |
| 163 cyg_interrupt *intr, | |
| 164 HAL_SavedRegisters *regs | |
| 165 ) | |
| 166 { | |
| 167 CYG_REPORT_FUNCTION(); | |
| 168 | |
| 169 #ifndef CYGIMP_HAL_COMMON_INTERRUPTS_CHAIN | |
| 170 | |
| 171 // Only do this if we are in a non-chained configuration. | |
| 172 // If we are chained, then chain_isr will do the DSR | |
| 173 // posting. | |
| 174 | |
| 175 if( isr_ret & CYG_ISR_CALL_DSR && intr != NULL ) post_dsr(intr); | |
| 176 | |
| 177 #endif | |
| 178 | |
| 179 if( dsr_disable_counter == 0 ) call_dsrs(); | |
| 180 | |
| 181 CYG_REPORT_RETURN(); | |
| 182 } | |
| 183 | |
| 184 //-------------------------------------------------------------------------- | |
| 185 // ISR for handling chained interrupts. | |
| 186 | |
| 187 #ifdef CYGIMP_HAL_COMMON_INTERRUPTS_CHAIN | |
| 188 | |
| 189 cyg_uint32 chain_isr(cyg_vector_t vector, CYG_ADDRWORD data) | |
| 190 { | |
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191 cyg_interrupt *p = *(cyg_interrupt **)data; |
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192 register cyg_uint32 isr_ret = 0; |
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193 register cyg_uint32 isr_chain_ret = 0; |
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194 |
| 2 | 195 CYG_REPORT_FUNCTION(); |
| 196 | |
| 197 while( p != NULL ) | |
| 198 { | |
| 199 if( p->vector == vector ) | |
| 200 { | |
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201 isr_ret = p->isr(vector, p->data); |
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202 |
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203 isr_chain_ret |= isr_ret; |
| 2 | 204 |
| 205 if( isr_ret & CYG_ISR_CALL_DSR ) post_dsr(p); | |
| 206 | |
| 207 if( isr_ret & CYG_ISR_HANDLED ) break; | |
| 208 } | |
| 209 | |
| 210 p = p->next; | |
| 211 } | |
| 212 | |
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213 #ifdef HAL_DEFAULT_ISR |
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214 if( (isr_chain_ret & (CYG_ISR_CALL_DSR|CYG_ISR_HANDLED)) == 0 ) |
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215 { |
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216 // If we finished the loop for some reason other than that an |
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217 // ISR has handled the interrupt, call any default ISR to either |
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218 // report the spurious interrupt, or do some other HAL level processing |
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219 // such as GDB interrupt detection etc. |
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220 |
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221 HAL_DEFAULT_ISR( vector, 0 ); |
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222 } |
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223 #endif |
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224 |
| 2 | 225 CYG_REPORT_RETURN(); |
| 226 | |
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227 return isr_ret & CYG_ISR_CALL_DSR; |
| 2 | 228 } |
| 229 | |
| 230 #endif | |
| 231 | |
| 232 //-------------------------------------------------------------------------- | |
| 233 // ISR lock. This disables interrupts and keeps a count of the number | |
| 234 // times it has been called. | |
| 235 | |
| 236 externC void cyg_drv_isr_lock() | |
| 237 { | |
| 238 CYG_REPORT_FUNCTION(); | |
| 239 | |
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240 if( isr_disable_counter == 0 ) |
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241 HAL_DISABLE_INTERRUPTS(isr_disable_state); |
| 2 | 242 |
| 243 CYG_ASSERT( isr_disable_counter >= 0 , "Disable counter negative"); | |
| 244 | |
| 245 isr_disable_counter++; | |
| 246 | |
| 247 CYG_REPORT_RETURN(); | |
| 248 } | |
| 249 | |
| 250 //-------------------------------------------------------------------------- | |
| 251 // Unlock ISRs. This decrements the count and re-enables interrupts if it | |
| 252 // goes zero. | |
| 253 | |
| 254 externC void cyg_drv_isr_unlock() | |
| 255 { | |
| 256 CYG_REPORT_FUNCTION(); | |
| 257 | |
| 258 CYG_ASSERT( isr_disable_counter > 0 , "Disable counter not greater than zero"); | |
| 259 | |
| 260 isr_disable_counter--; | |
| 261 | |
| 262 if ( isr_disable_counter == 0 ) | |
| 263 { | |
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264 HAL_RESTORE_INTERRUPTS(isr_disable_state); |
| 2 | 265 } |
| 266 | |
| 267 CYG_REPORT_RETURN(); | |
| 268 } | |
| 269 | |
| 270 //-------------------------------------------------------------------------- | |
| 271 // Lock DSR lock. Simply increment the counter. | |
| 272 | |
| 273 externC void cyg_drv_dsr_lock() | |
| 274 { | |
| 275 CYG_REPORT_FUNCTION(); | |
| 276 | |
| 277 dsr_disable_counter++; | |
| 278 | |
| 279 CYG_REPORT_RETURN(); | |
| 280 } | |
| 281 | |
| 282 //-------------------------------------------------------------------------- | |
| 283 // Unlock DSR lock. If the counter is about to go zero, call any pending | |
| 284 // DSRs and then zero the counter. | |
| 285 | |
| 286 externC void cyg_drv_dsr_unlock() | |
| 287 { | |
| 288 CYG_REPORT_FUNCTION(); | |
| 289 | |
| 290 do | |
| 291 { | |
| 292 if( dsr_disable_counter == 1 ) | |
| 293 { | |
| 294 call_dsrs(); | |
| 295 } | |
| 296 | |
| 297 HAL_REORDER_BARRIER(); | |
| 298 | |
| 299 dsr_disable_counter = 0; | |
| 300 | |
| 301 HAL_REORDER_BARRIER(); | |
| 302 | |
| 303 // Check that no DSRs have been posted between calling | |
| 304 // call_dsrs() and zeroing dsr_disable_counter. If so, | |
| 305 // loop back and call them. | |
| 306 | |
| 307 if( dsr_list != NULL ) | |
| 308 { | |
| 309 dsr_disable_counter = 1; | |
| 310 continue; | |
| 311 } | |
| 312 | |
| 313 CYG_REPORT_RETURN(); | |
| 314 | |
| 315 return; | |
| 316 | |
| 317 } while(1); | |
| 318 | |
| 319 CYG_FAIL( "Should not be executed" ); | |
| 320 } | |
| 321 | |
| 322 //-------------------------------------------------------------------------- | |
| 323 // Initialize a mutex. | |
| 324 | |
| 325 externC void cyg_drv_mutex_init( cyg_drv_mutex_t *mutex ) | |
| 326 { | |
| 327 CYG_REPORT_FUNCTION(); | |
| 328 | |
| 329 mutex->lock = 0; | |
| 330 | |
| 331 CYG_REPORT_RETURN(); | |
| 332 } | |
| 333 | |
| 334 //-------------------------------------------------------------------------- | |
| 335 // Destroy a mutex. | |
| 336 | |
| 337 externC void cyg_drv_mutex_destroy( cyg_drv_mutex_t *mutex ) | |
| 338 { | |
| 339 CYG_REPORT_FUNCTION(); | |
| 340 | |
| 341 mutex->lock = -1; | |
| 342 | |
| 343 CYG_REPORT_RETURN(); | |
| 344 } | |
| 345 | |
| 346 //-------------------------------------------------------------------------- | |
| 347 // Lock a mutex. We check that we are not trying to lock a locked or | |
| 348 // destroyed mutex and if not, set it locked. | |
| 349 | |
| 350 externC cyg_bool_t cyg_drv_mutex_lock( cyg_drv_mutex_t *mutex ) | |
| 351 { | |
| 352 CYG_REPORT_FUNCTION(); | |
| 353 | |
| 354 CYG_ASSERT( mutex->lock == 0 , "Trying to lock locked mutex"); | |
| 355 | |
| 356 mutex->lock = 1; | |
| 357 | |
| 358 CYG_REPORT_RETURN(); | |
| 359 | |
| 360 return true; | |
| 361 } | |
| 362 | |
| 363 //-------------------------------------------------------------------------- | |
| 364 // Attempt to claim a mutex, and return if it cannot be. | |
| 365 | |
| 366 externC cyg_bool_t cyg_drv_mutex_trylock( cyg_drv_mutex_t *mutex ) | |
| 367 { | |
| 368 cyg_bool_t result = true; | |
| 369 | |
| 370 CYG_REPORT_FUNCTION(); | |
| 371 | |
| 372 if( mutex->lock == 1 ) result = false; | |
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373 |
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374 mutex->lock = 1; |
| 2 | 375 |
| 376 CYG_REPORT_RETURN(); | |
| 377 | |
| 378 return result; | |
| 379 } | |
| 380 | |
| 381 //-------------------------------------------------------------------------- | |
| 382 // Unlock a mutex. We check that the mutex is actually locked before doing | |
| 383 // this. | |
| 384 | |
| 385 externC void cyg_drv_mutex_unlock( cyg_drv_mutex_t *mutex ) | |
| 386 { | |
| 387 CYG_REPORT_FUNCTION(); | |
| 388 | |
| 389 CYG_ASSERT( mutex->lock == 1 , "Trying to unlock unlocked mutex"); | |
| 390 | |
| 391 mutex->lock = 0; | |
| 392 | |
| 393 CYG_REPORT_RETURN(); | |
| 394 } | |
| 395 | |
| 396 //-------------------------------------------------------------------------- | |
| 397 // Release all threads waiting for the mutex. | |
| 398 // This is really for threads, so we do nothing here. | |
| 399 | |
| 400 externC void cyg_drv_mutex_release( cyg_drv_mutex_t *mutex ) | |
| 401 { | |
| 402 CYG_REPORT_FUNCTION(); | |
| 403 | |
| 404 | |
| 405 | |
| 406 CYG_REPORT_RETURN(); | |
| 407 } | |
| 408 | |
| 409 | |
| 410 //-------------------------------------------------------------------------- | |
| 411 // Initialized a condition variable. | |
| 412 | |
| 413 externC void cyg_drv_cond_init( cyg_drv_cond_t *cond, cyg_drv_mutex_t *mutex ) | |
| 414 { | |
| 415 CYG_REPORT_FUNCTION(); | |
| 416 | |
| 417 cond->wait = 0; | |
| 418 cond->mutex = mutex; | |
| 419 | |
| 420 CYG_REPORT_RETURN(); | |
| 421 } | |
| 422 | |
| 423 | |
| 424 //-------------------------------------------------------------------------- | |
| 425 // Destroy a condition variable. | |
| 426 | |
| 427 externC void cyg_drv_cond_destroy( cyg_drv_cond_t *cond ) | |
| 428 { | |
| 429 CYG_REPORT_FUNCTION(); | |
| 430 | |
| 431 cond->wait = -1; | |
| 432 cond->mutex = NULL; | |
| 433 | |
| 434 CYG_REPORT_RETURN(); | |
| 435 } | |
| 436 | |
| 437 // ------------------------------------------------------------------------- | |
| 438 // Wait for a condition variable to be signalled. We simply busy wait | |
| 439 // polling the condition variable's wait member until a DSR sets it to | |
| 440 // 0. Note that the semantics of condition variables means that the | |
| 441 // wakeup only happens if there is a thread actually waiting on the CV | |
| 442 // when the signal is sent. | |
| 443 | |
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444 externC cyg_bool cyg_drv_cond_wait( cyg_drv_cond_t *cond ) |
| 2 | 445 { |
| 446 CYG_REPORT_FUNCTION(); | |
| 447 | |
| 448 CYG_ASSERT( cond->mutex != NULL, "Uninitialized condition variable"); | |
| 449 CYG_ASSERT( cond->mutex->lock, "Mutex not locked"); | |
| 450 | |
| 451 cyg_drv_dsr_lock(); | |
| 452 | |
| 453 cond->wait = 1; | |
| 454 | |
| 455 while( cond->wait == 1 ) | |
| 456 { | |
| 457 // While looping we call call_dsrs() to service any DSRs that | |
| 458 // get posted. One of these will make the call to cond_signal | |
| 459 // to break us out of this loop. If we do not have the DSR | |
| 460 // lock claimed, then a race condition could occur and keep us | |
| 461 // stuck here forever. | |
| 462 | |
| 463 call_dsrs(); | |
| 464 } | |
| 465 | |
| 466 cyg_drv_dsr_unlock(); | |
| 467 | |
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468 CYG_REPORT_RETURN(); |
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469 |
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470 return true; |
| 2 | 471 } |
| 472 | |
| 473 //-------------------------------------------------------------------------- | |
| 474 // Signal a condition variable. This sets the wait member to zero, which | |
| 475 // has no effect when there is no waiter, but will wake up any waiting | |
| 476 // thread. | |
| 477 | |
| 478 externC void cyg_drv_cond_signal( cyg_drv_cond_t *cond ) | |
| 479 { | |
| 480 CYG_REPORT_FUNCTION(); | |
| 481 | |
| 482 cond->wait = 0; | |
| 483 | |
| 484 CYG_REPORT_RETURN(); | |
| 485 } | |
| 486 | |
| 487 | |
| 488 //-------------------------------------------------------------------------- | |
| 489 // Broadcast to condition variable. This is exactly the same a signal since | |
| 490 // there can only be one waiter. | |
| 491 | |
| 492 externC void cyg_drv_cond_broadcast( cyg_drv_cond_t *cond ) | |
| 493 { | |
| 494 CYG_REPORT_FUNCTION(); | |
| 495 | |
| 496 cond->wait = 0; | |
| 497 | |
| 498 CYG_REPORT_RETURN(); | |
| 499 } | |
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500 |
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501 //-------------------------------------------------------------------------- |
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502 // Spinlock support. |
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503 // Since we can only support a single CPU in this version of the API, we only |
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504 // set and clear the lock variable to keep track of what's happening. |
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505 |
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506 void cyg_drv_spinlock_init( |
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507 cyg_drv_spinlock_t *lock, /* spinlock to initialize */ |
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508 cyg_bool_t locked /* init locked or unlocked */ |
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509 ) |
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510 { |
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511 CYG_REPORT_FUNCTION(); |
| 2 | 512 |
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513 lock->lock = locked; |
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514 |
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515 CYG_REPORT_RETURN(); |
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516 } |
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517 |
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518 void cyg_drv_spinlock_destroy( cyg_drv_spinlock_t *lock ) |
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519 { |
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520 CYG_REPORT_FUNCTION(); |
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521 |
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522 lock->lock = -1; |
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523 |
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524 CYG_REPORT_RETURN(); |
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525 } |
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526 |
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527 void cyg_drv_spinlock_spin( cyg_drv_spinlock_t *lock ) |
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528 { |
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529 CYG_REPORT_FUNCTION(); |
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530 |
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531 CYG_ASSERT( lock->lock == 0 , "Trying to lock locked spinlock"); |
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532 |
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533 lock->lock = 1; |
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534 |
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535 CYG_REPORT_RETURN(); |
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536 } |
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537 |
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538 void cyg_drv_spinlock_clear( cyg_drv_spinlock_t *lock ) |
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539 { |
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540 CYG_REPORT_FUNCTION(); |
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541 |
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542 CYG_ASSERT( lock->lock == 1 , "Trying to clear cleared spinlock"); |
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543 |
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544 lock->lock = 0; |
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545 |
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546 CYG_REPORT_RETURN(); |
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547 } |
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548 |
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549 cyg_bool_t cyg_drv_spinlock_try( cyg_drv_spinlock_t *lock ) |
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550 { |
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551 cyg_bool_t result = true; |
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552 |
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553 CYG_REPORT_FUNCTION(); |
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554 |
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555 if( lock->lock == 1 ) result = false; |
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556 |
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557 lock->lock = 1; |
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558 |
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559 CYG_REPORT_RETURN(); |
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560 |
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561 return result; |
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562 } |
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563 |
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564 cyg_bool_t cyg_drv_spinlock_test( cyg_drv_spinlock_t *lock ) |
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565 { |
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566 cyg_bool_t result = true; |
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567 |
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568 CYG_REPORT_FUNCTION(); |
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569 |
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570 if( lock->lock == 1 ) result = false; |
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571 |
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572 CYG_REPORT_RETURN(); |
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573 |
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574 return result; |
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575 } |
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576 |
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577 void cyg_drv_spinlock_spin_intsave( cyg_drv_spinlock_t *lock, |
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578 cyg_addrword_t *istate ) |
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579 { |
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580 CYG_REPORT_FUNCTION(); |
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581 |
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582 HAL_DISABLE_INTERRUPTS( *istate ); |
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583 |
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584 lock->lock = 1; |
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585 |
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586 CYG_REPORT_RETURN(); |
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587 } |
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588 |
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589 |
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590 void cyg_drv_spinlock_clear_intsave( cyg_drv_spinlock_t *lock, |
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591 cyg_addrword_t istate ) |
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592 { |
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593 CYG_REPORT_FUNCTION(); |
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594 |
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595 lock->lock = 0; |
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596 |
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597 HAL_RESTORE_INTERRUPTS( istate ); |
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598 |
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599 CYG_REPORT_RETURN(); |
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600 } |
| 2 | 601 |
| 602 //-------------------------------------------------------------------------- | |
| 603 // Create an interrupt object. | |
| 604 | |
| 605 externC void cyg_drv_interrupt_create( | |
| 606 cyg_vector_t vector, | |
| 607 cyg_priority_t priority, | |
| 608 cyg_addrword_t data, | |
| 609 cyg_ISR_t *isr, | |
| 610 cyg_DSR_t *dsr, | |
| 611 cyg_handle_t *handle, | |
| 612 cyg_interrupt *intr | |
| 613 ) | |
| 614 { | |
| 615 CYG_REPORT_FUNCTION(); | |
| 616 | |
| 617 intr->vector = vector; | |
| 618 intr->priority = priority; | |
| 619 intr->isr = isr; | |
| 620 intr->dsr = dsr; | |
| 621 intr->data = data; | |
| 622 intr->next_dsr = NULL; | |
| 623 intr->dsr_count = 0; | |
| 624 | |
| 625 #ifdef CYGIMP_HAL_COMMON_INTERRUPTS_CHAIN | |
| 626 | |
| 627 intr->next = NULL; | |
| 628 | |
| 629 #endif | |
| 630 | |
| 631 *handle = (cyg_handle_t)intr; | |
| 632 | |
| 633 CYG_REPORT_RETURN(); | |
| 634 } | |
| 635 | |
| 636 //-------------------------------------------------------------------------- | |
| 637 // Delete an interrupt object. This merely ensures that it is detached from | |
| 638 // the vector. | |
| 639 | |
| 640 externC void cyg_drv_interrupt_delete( cyg_handle_t interrupt ) | |
| 641 { | |
| 642 CYG_REPORT_FUNCTION(); | |
| 643 | |
| 644 cyg_drv_interrupt_detach( interrupt ); | |
| 645 | |
| 646 CYG_REPORT_RETURN(); | |
| 647 } | |
| 648 | |
| 649 //-------------------------------------------------------------------------- | |
| 650 // | |
| 651 | |
| 652 externC void cyg_drv_interrupt_attach( cyg_handle_t interrupt ) | |
| 653 { | |
| 654 cyg_interrupt *intr = (cyg_interrupt *)interrupt; | |
| 655 | |
| 656 CYG_REPORT_FUNCTION(); | |
| 657 | |
| 658 CYG_ASSERT( intr->vector >= CYGNUM_HAL_ISR_MIN, "Invalid vector"); | |
| 659 CYG_ASSERT( intr->vector <= CYGNUM_HAL_ISR_MAX, "Invalid vector"); | |
| 660 | |
| 661 HAL_INTERRUPT_SET_LEVEL( intr->vector, intr->priority ); | |
| 662 | |
| 663 #ifdef CYGIMP_HAL_COMMON_INTERRUPTS_CHAIN | |
| 664 | |
| 665 CYG_ASSERT( intr->next == NULL , "cyg_interrupt already on a list"); | |
| 666 | |
|
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667 { |
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668 cyg_uint32 index; |
| 2 | 669 |
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670 HAL_TRANSLATE_VECTOR( intr->vector, index ); |
| 2 | 671 |
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672 if( chain_list[index] == NULL ) |
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673 { |
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674 // First Interrupt on this chain, just assign it and |
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675 // register the chain_isr with the HAL. |
| 2 | 676 |
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677 chain_list[index] = intr; |
| 2 | 678 |
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679 HAL_INTERRUPT_ATTACH( intr->vector, chain_isr, |
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680 &chain_list[index], NULL ); |
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681 } |
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682 else |
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683 { |
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684 // There are already interrupts chained, add this one into |
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685 // the chain in priority order. |
| 2 | 686 |
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687 cyg_interrupt **p = &chain_list[index]; |
| 2 | 688 |
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689 while( *p != NULL ) |
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690 { |
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691 cyg_interrupt *n = *p; |
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692 |
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693 if( n->priority < intr->priority ) break; |
| 2 | 694 |
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695 p = &n->next; |
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696 } |
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697 intr->next = *p; |
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698 *p = intr; |
| 2 | 699 } |
| 700 } | |
| 701 | |
| 702 #else | |
| 703 | |
| 704 HAL_INTERRUPT_ATTACH( intr->vector, intr->isr, intr->data, intr ); | |
| 705 | |
| 706 #endif | |
| 707 | |
| 708 CYG_REPORT_RETURN(); | |
| 709 } | |
| 710 | |
| 711 | |
| 712 //-------------------------------------------------------------------------- | |
| 713 // Detach an interrupt from its vector. | |
| 714 | |
| 715 externC void cyg_drv_interrupt_detach( cyg_handle_t interrupt ) | |
| 716 { | |
| 717 cyg_interrupt *intr = (cyg_interrupt *)interrupt; | |
| 718 | |
| 719 CYG_REPORT_FUNCTION(); | |
| 720 | |
| 721 CYG_ASSERT( intr->vector >= CYGNUM_HAL_ISR_MIN, "Invalid vector"); | |
| 722 CYG_ASSERT( intr->vector <= CYGNUM_HAL_ISR_MAX, "Invalid vector"); | |
| 723 | |
| 724 #ifdef CYGIMP_HAL_COMMON_INTERRUPTS_CHAIN | |
| 725 | |
| 726 // Remove the interrupt object from the vector chain. | |
| 727 | |
|
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728 { |
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729 cyg_uint32 index; |
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730 cyg_interrupt **p; |
| 2 | 731 |
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732 HAL_TRANSLATE_VECTOR( intr->vector, index ); |
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733 |
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734 p = &chain_list[index]; |
| 2 | 735 |
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736 while( *p != NULL ) |
| 2 | 737 { |
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738 cyg_interrupt *n = *p; |
| 2 | 739 |
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740 if( n == intr ) |
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741 { |
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742 *p = intr->next; |
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743 break; |
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744 } |
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745 |
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746 p = &n->next; |
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747 } |
| 2 | 748 |
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749 // If this was the last one, detach the vector. |
| 2 | 750 |
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751 if( chain_list[index] == NULL ) |
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752 HAL_INTERRUPT_DETACH( intr->vector, chain_isr ); |
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753 } |
| 2 | 754 |
| 755 #else | |
| 756 | |
| 757 HAL_INTERRUPT_DETACH( intr->vector, intr->isr ); | |
| 758 | |
| 759 #endif | |
| 760 | |
| 761 CYG_REPORT_RETURN(); | |
| 762 } | |
| 763 | |
| 764 | |
| 765 //-------------------------------------------------------------------------- | |
| 766 // Mask delivery of an interrupt at the interrupt controller. | |
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767 // (Interrupt safe) |
| 2 | 768 |
| 769 externC void cyg_drv_interrupt_mask( cyg_vector_t vector ) | |
| 770 { | |
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771 CYG_INTERRUPT_STATE old_ints; |
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772 |
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773 CYG_REPORT_FUNCTION(); |
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774 CYG_REPORT_FUNCARG1("vector=%d", vector); |
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775 |
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776 CYG_ASSERT( vector >= CYGNUM_HAL_ISR_MIN, "Invalid vector"); |
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777 CYG_ASSERT( vector <= CYGNUM_HAL_ISR_MAX, "Invalid vector"); |
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778 |
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779 HAL_DISABLE_INTERRUPTS(old_ints); |
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780 HAL_INTERRUPT_MASK( vector ); |
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781 HAL_RESTORE_INTERRUPTS(old_ints); |
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782 |
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783 CYG_REPORT_RETURN(); |
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784 } |
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785 |
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786 //-------------------------------------------------------------------------- |
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787 // Mask delivery of an interrupt at the interrupt controller. |
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788 // (Not interrupt safe) |
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789 |
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790 externC void cyg_drv_interrupt_mask_intunsafe( cyg_vector_t vector ) |
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791 { |
| 2 | 792 CYG_REPORT_FUNCTION(); |
| 793 CYG_REPORT_FUNCARG1("vector=%d", vector); | |
| 794 | |
| 795 CYG_ASSERT( vector >= CYGNUM_HAL_ISR_MIN, "Invalid vector"); | |
| 796 CYG_ASSERT( vector <= CYGNUM_HAL_ISR_MAX, "Invalid vector"); | |
| 797 | |
| 798 HAL_INTERRUPT_MASK( vector ); | |
| 799 | |
| 800 CYG_REPORT_RETURN(); | |
| 801 } | |
| 802 | |
| 803 //-------------------------------------------------------------------------- | |
| 804 // Unmask delivery of an interrupt at the interrupt controller. | |
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805 // (Interrupt safe) |
| 2 | 806 |
| 807 externC void cyg_drv_interrupt_unmask( cyg_vector_t vector ) | |
| 808 { | |
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809 CYG_INTERRUPT_STATE old_ints; |
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810 |
| 2 | 811 CYG_REPORT_FUNCTION(); |
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812 CYG_REPORT_FUNCARG1("vector=%d", vector); |
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813 |
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814 CYG_ASSERT( vector >= CYGNUM_HAL_ISR_MIN, "Invalid vector"); |
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815 CYG_ASSERT( vector <= CYGNUM_HAL_ISR_MAX, "Invalid vector"); |
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816 |
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817 HAL_DISABLE_INTERRUPTS(old_ints); |
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818 HAL_INTERRUPT_UNMASK( vector ); |
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819 HAL_RESTORE_INTERRUPTS(old_ints); |
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820 |
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821 CYG_REPORT_RETURN(); |
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822 } |
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823 |
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824 //-------------------------------------------------------------------------- |
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825 // Unmask delivery of an interrupt at the interrupt controller. |
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826 // (Not interrupt safe) |
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827 |
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828 externC void cyg_drv_interrupt_unmask_intunsafe( cyg_vector_t vector ) |
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829 { |
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830 CYG_REPORT_FUNCTION(); |
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831 CYG_REPORT_FUNCARG1("vector=%d", vector); |
| 2 | 832 |
| 833 CYG_ASSERT( vector >= CYGNUM_HAL_ISR_MIN, "Invalid vector"); | |
| 834 CYG_ASSERT( vector <= CYGNUM_HAL_ISR_MAX, "Invalid vector"); | |
| 835 | |
| 836 HAL_INTERRUPT_UNMASK( vector ); | |
| 837 | |
| 838 CYG_REPORT_RETURN(); | |
| 839 } | |
| 840 | |
| 841 //-------------------------------------------------------------------------- | |
| 842 // Acknowledge an interrupt at the controller to allow another interrupt | |
| 843 // to be delivered. | |
| 844 | |
| 845 externC void cyg_drv_interrupt_acknowledge( cyg_vector_t vector ) | |
| 846 { | |
| 847 // CYG_REPORT_FUNCTION(); | |
| 848 | |
| 849 CYG_ASSERT( vector >= CYGNUM_HAL_ISR_MIN, "Invalid vector"); | |
| 850 CYG_ASSERT( vector <= CYGNUM_HAL_ISR_MAX, "Invalid vector"); | |
| 851 | |
| 852 HAL_INTERRUPT_ACKNOWLEDGE( vector ); | |
| 853 | |
| 854 // CYG_REPORT_RETURN(); | |
| 855 } | |
| 856 | |
| 857 //-------------------------------------------------------------------------- | |
| 858 // Configure interrupt detection parameters. | |
| 859 | |
| 860 externC void cyg_drv_interrupt_configure( | |
| 861 cyg_vector_t vector, | |
| 862 cyg_bool_t level, | |
| 863 cyg_bool_t up | |
| 864 ) | |
| 865 { | |
| 866 CYG_REPORT_FUNCTION(); | |
| 867 CYG_REPORT_FUNCARG3("vector = %d, level = %d, up = %d", vector, level, | |
| 868 up); | |
| 869 | |
| 870 CYG_ASSERT( vector >= CYGNUM_HAL_ISR_MIN, "Invalid vector"); | |
| 871 CYG_ASSERT( vector <= CYGNUM_HAL_ISR_MAX, "Invalid vector"); | |
| 872 | |
| 873 HAL_INTERRUPT_CONFIGURE( vector, level, up ); | |
| 874 | |
| 875 CYG_REPORT_RETURN(); | |
| 876 } | |
| 877 | |
| 878 //-------------------------------------------------------------------------- | |
| 879 // Configure interrupt priority level. | |
| 880 | |
| 881 externC void cyg_drv_interrupt_level( cyg_vector_t vector, cyg_priority_t level ) | |
| 882 { | |
| 883 CYG_REPORT_FUNCTION(); | |
| 884 CYG_REPORT_FUNCARG2("vector = %d, level = %d", vector, level); | |
| 885 | |
| 886 CYG_ASSERT( vector >= CYGNUM_HAL_ISR_MIN, "Invalid vector"); | |
| 887 CYG_ASSERT( vector <= CYGNUM_HAL_ISR_MAX, "Invalid vector"); | |
| 888 | |
| 889 HAL_INTERRUPT_SET_LEVEL( vector, level ); | |
| 890 | |
| 891 CYG_REPORT_RETURN(); | |
| 892 } | |
| 893 | |
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894 // ------------------------------------------------------------------------- |
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895 // CPU interrupt routing |
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896 |
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897 externC void cyg_drv_interrupt_set_cpu( cyg_vector_t vector, cyg_cpu_t cpu ) |
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898 { |
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899 CYG_REPORT_FUNCTION(); |
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900 CYG_REPORT_FUNCARG2("vector = %d, cpu = %d", vector, cpu); |
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901 |
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902 CYG_ASSERT( vector >= CYGNUM_HAL_ISR_MIN, "Invalid vector"); |
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903 CYG_ASSERT( vector <= CYGNUM_HAL_ISR_MAX, "Invalid vector"); |
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904 |
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905 #ifdef CYGPKG_HAL_SMP_SUPPORT |
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906 HAL_INTERRUPT_SET_CPU( vector, cpu ); |
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907 #endif |
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908 |
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909 CYG_REPORT_RETURN(); |
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910 } |
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911 |
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912 externC cyg_cpu_t cyg_drv_interrupt_get_cpu( cyg_vector_t vector ) |
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913 { |
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914 cyg_cpu_t cpu = 0; |
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915 |
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916 CYG_REPORT_FUNCTION(); |
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917 CYG_REPORT_FUNCARG1("vector = %d", vector); |
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918 |
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919 CYG_ASSERT( vector >= CYGNUM_HAL_ISR_MIN, "Invalid vector"); |
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920 CYG_ASSERT( vector <= CYGNUM_HAL_ISR_MAX, "Invalid vector"); |
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921 |
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922 #ifdef CYGPKG_HAL_SMP_SUPPORT |
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923 HAL_INTERRUPT_GET_CPU( vector, cpu ); |
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924 #endif |
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925 |
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926 CYG_REPORT_RETURN(); |
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927 |
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928 return cpu; |
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929 } |
| 2 | 930 |
| 931 // ------------------------------------------------------------------------- | |
| 932 // Exception delivery function called from the HAL as a result of a | |
| 933 // hardware exception being raised. | |
| 934 | |
| 935 externC void cyg_hal_deliver_exception( CYG_WORD code, CYG_ADDRWORD data ) | |
| 936 { | |
| 937 CYG_FAIL(" !!! Exception !!! "); | |
| 938 } | |
| 939 | |
| 940 | |
| 941 #endif | |
| 942 | |
| 943 //-------------------------------------------------------------------------- | |
| 944 // EOF drv_api.c |