1 | /** |
---|
2 | * @file |
---|
3 | * |
---|
4 | * @brief Inlined Routines in the Watchdog Handler |
---|
5 | * |
---|
6 | * This file contains the static inline implementation of all inlined |
---|
7 | * routines in the Watchdog Handler. |
---|
8 | */ |
---|
9 | |
---|
10 | /* |
---|
11 | * COPYRIGHT (c) 1989-2004. |
---|
12 | * On-Line Applications Research Corporation (OAR). |
---|
13 | * |
---|
14 | * The license and distribution terms for this file may be |
---|
15 | * found in the file LICENSE in this distribution or at |
---|
16 | * http://www.rtems.org/license/LICENSE. |
---|
17 | */ |
---|
18 | |
---|
19 | #ifndef _RTEMS_SCORE_WATCHDOGIMPL_H |
---|
20 | #define _RTEMS_SCORE_WATCHDOGIMPL_H |
---|
21 | |
---|
22 | #include <rtems/score/watchdog.h> |
---|
23 | #include <rtems/score/assert.h> |
---|
24 | #include <rtems/score/chainimpl.h> |
---|
25 | #include <rtems/score/isrlock.h> |
---|
26 | |
---|
27 | #ifdef __cplusplus |
---|
28 | extern "C" { |
---|
29 | #endif |
---|
30 | |
---|
31 | /** |
---|
32 | * @addtogroup ScoreWatchdog |
---|
33 | * @{ |
---|
34 | */ |
---|
35 | |
---|
36 | /** |
---|
37 | * @brief Watchdog initializer for static initialization. |
---|
38 | * |
---|
39 | * @see _Watchdog_Initialize(). |
---|
40 | */ |
---|
41 | #define WATCHDOG_INITIALIZER( routine, id, user_data ) \ |
---|
42 | { \ |
---|
43 | { NULL, NULL }, \ |
---|
44 | WATCHDOG_INACTIVE, \ |
---|
45 | 0, 0, 0, 0, \ |
---|
46 | ( routine ), ( id ), ( user_data ) \ |
---|
47 | } |
---|
48 | |
---|
49 | /** |
---|
50 | * @brief Iterator item to synchronize concurrent insert, remove and tickle |
---|
51 | * operations. |
---|
52 | */ |
---|
53 | typedef struct { |
---|
54 | /** |
---|
55 | * @brief A node for a Watchdog_Header::Iterators chain. |
---|
56 | */ |
---|
57 | Chain_Node Node; |
---|
58 | |
---|
59 | /** |
---|
60 | * @brief The current delta interval of the new watchdog to insert. |
---|
61 | */ |
---|
62 | Watchdog_Interval delta_interval; |
---|
63 | |
---|
64 | /** |
---|
65 | * @brief The current watchdog of the chain on the way to insert the new |
---|
66 | * watchdog. |
---|
67 | */ |
---|
68 | Chain_Node *current; |
---|
69 | } Watchdog_Iterator; |
---|
70 | |
---|
71 | /** |
---|
72 | * @brief Watchdog header. |
---|
73 | */ |
---|
74 | typedef struct { |
---|
75 | /** |
---|
76 | * @brief ISR lock to protect this watchdog chain. |
---|
77 | */ |
---|
78 | ISR_LOCK_MEMBER( Lock ) |
---|
79 | |
---|
80 | /** |
---|
81 | * @brief The chain of active or transient watchdogs. |
---|
82 | */ |
---|
83 | Chain_Control Watchdogs; |
---|
84 | |
---|
85 | /** |
---|
86 | * @brief Currently active iterators. |
---|
87 | * |
---|
88 | * The iterators are registered in _Watchdog_Insert() and updated in case the |
---|
89 | * watchdog chain changes. |
---|
90 | */ |
---|
91 | Chain_Control Iterators; |
---|
92 | } Watchdog_Header; |
---|
93 | |
---|
94 | /** |
---|
95 | * @brief Watchdog chain which is managed at ticks. |
---|
96 | * |
---|
97 | * This is the watchdog chain which is managed at ticks. |
---|
98 | */ |
---|
99 | SCORE_EXTERN Watchdog_Header _Watchdog_Ticks_header; |
---|
100 | |
---|
101 | /** |
---|
102 | * @brief Watchdog chain which is managed at second boundaries. |
---|
103 | * |
---|
104 | * This is the watchdog chain which is managed at second boundaries. |
---|
105 | */ |
---|
106 | SCORE_EXTERN Watchdog_Header _Watchdog_Seconds_header; |
---|
107 | |
---|
108 | RTEMS_INLINE_ROUTINE void _Watchdog_Acquire( |
---|
109 | Watchdog_Header *header, |
---|
110 | ISR_lock_Context *lock_context |
---|
111 | ) |
---|
112 | { |
---|
113 | _ISR_lock_ISR_disable_and_acquire( &header->Lock, lock_context ); |
---|
114 | } |
---|
115 | |
---|
116 | RTEMS_INLINE_ROUTINE void _Watchdog_Release( |
---|
117 | Watchdog_Header *header, |
---|
118 | ISR_lock_Context *lock_context |
---|
119 | ) |
---|
120 | { |
---|
121 | _ISR_lock_Release_and_ISR_enable( &header->Lock, lock_context ); |
---|
122 | } |
---|
123 | |
---|
124 | RTEMS_INLINE_ROUTINE void _Watchdog_Flash( |
---|
125 | Watchdog_Header *header, |
---|
126 | ISR_lock_Context *lock_context |
---|
127 | ) |
---|
128 | { |
---|
129 | _ISR_lock_Flash( &header->Lock, lock_context ); |
---|
130 | } |
---|
131 | |
---|
132 | /** |
---|
133 | * @brief Initialize the watchdog handler. |
---|
134 | * |
---|
135 | * This routine initializes the watchdog handler. The watchdog |
---|
136 | * synchronization flag is initialized and the watchdog chains are |
---|
137 | * initialized and emptied. |
---|
138 | */ |
---|
139 | void _Watchdog_Handler_initialization( void ); |
---|
140 | |
---|
141 | /** |
---|
142 | * @brief Triggers a watchdog tick. |
---|
143 | * |
---|
144 | * This routine executes TOD, watchdog and scheduler ticks. |
---|
145 | */ |
---|
146 | void _Watchdog_Tick( void ); |
---|
147 | |
---|
148 | /** |
---|
149 | * @brief Removes @a the_watchdog from the watchdog chain. |
---|
150 | * |
---|
151 | * This routine removes @a the_watchdog from the watchdog chain on which |
---|
152 | * it resides and returns the state @a the_watchdog timer was in. |
---|
153 | * |
---|
154 | * @param[in] header The watchdog chain. |
---|
155 | * @param[in] the_watchdog will be removed |
---|
156 | * @retval the state in which @a the_watchdog was in when removed |
---|
157 | */ |
---|
158 | Watchdog_States _Watchdog_Remove ( |
---|
159 | Watchdog_Header *header, |
---|
160 | Watchdog_Control *the_watchdog |
---|
161 | ); |
---|
162 | |
---|
163 | /** |
---|
164 | * @brief Adjusts the header watchdog chain in the backward direction for |
---|
165 | * units ticks. |
---|
166 | * |
---|
167 | * @param[in] header The watchdog chain. |
---|
168 | * @param[in] units The units of ticks to adjust. |
---|
169 | */ |
---|
170 | void _Watchdog_Adjust_backward( |
---|
171 | Watchdog_Header *header, |
---|
172 | Watchdog_Interval units |
---|
173 | ); |
---|
174 | |
---|
175 | /** |
---|
176 | * @brief Adjusts the watchdogs in backward direction in a locked context. |
---|
177 | * |
---|
178 | * The caller must be the owner of the watchdog lock and will be the owner |
---|
179 | * after the call. |
---|
180 | * |
---|
181 | * @param[in] header The watchdog header. |
---|
182 | * @param[in] units The units of ticks to adjust. |
---|
183 | * |
---|
184 | * @see _Watchdog_Adjust_forward(). |
---|
185 | */ |
---|
186 | void _Watchdog_Adjust_backward_locked( |
---|
187 | Watchdog_Header *header, |
---|
188 | Watchdog_Interval units |
---|
189 | ); |
---|
190 | |
---|
191 | /** |
---|
192 | * @brief Adjusts the header watchdog chain in the forward direction for units |
---|
193 | * ticks. |
---|
194 | * |
---|
195 | * This may lead to several _Watchdog_Tickle() invocations. |
---|
196 | * |
---|
197 | * @param[in] header The watchdog chain. |
---|
198 | * @param[in] units The units of ticks to adjust. |
---|
199 | */ |
---|
200 | void _Watchdog_Adjust_forward( |
---|
201 | Watchdog_Header *header, |
---|
202 | Watchdog_Interval units |
---|
203 | ); |
---|
204 | |
---|
205 | /** |
---|
206 | * @brief Adjusts the watchdogs in forward direction in a locked context. |
---|
207 | * |
---|
208 | * The caller must be the owner of the watchdog lock and will be the owner |
---|
209 | * after the call. This function may release and acquire the watchdog lock |
---|
210 | * internally. |
---|
211 | * |
---|
212 | * @param[in] header The watchdog header. |
---|
213 | * @param[in] units The units of ticks to adjust. |
---|
214 | * @param[in] lock_context The lock context. |
---|
215 | * |
---|
216 | * @see _Watchdog_Adjust_forward(). |
---|
217 | */ |
---|
218 | void _Watchdog_Adjust_forward_locked( |
---|
219 | Watchdog_Header *header, |
---|
220 | Watchdog_Interval units, |
---|
221 | ISR_lock_Context *lock_context |
---|
222 | ); |
---|
223 | |
---|
224 | /** |
---|
225 | * @brief Inserts @a the_watchdog into the @a header watchdog chain |
---|
226 | * for a time of @a units. |
---|
227 | * |
---|
228 | * This routine inserts @a the_watchdog into the @a header watchdog chain |
---|
229 | * for a time of @a units. |
---|
230 | * Update the delta interval counters. |
---|
231 | * |
---|
232 | * @param[in] header is @a the_watchdog list to insert @a the_watchdog on |
---|
233 | * @param[in] the_watchdog is the watchdog to insert |
---|
234 | */ |
---|
235 | void _Watchdog_Insert ( |
---|
236 | Watchdog_Header *header, |
---|
237 | Watchdog_Control *the_watchdog |
---|
238 | ); |
---|
239 | |
---|
240 | /** |
---|
241 | * @brief Inserts the watchdog in a locked context. |
---|
242 | * |
---|
243 | * The caller must be the owner of the watchdog lock and will be the owner |
---|
244 | * after the call. This function may release and acquire the watchdog lock |
---|
245 | * internally. |
---|
246 | * |
---|
247 | * @param[in] header The watchdog header. |
---|
248 | * @param[in] the_watchdog The watchdog. |
---|
249 | * @param[in] lock_context The lock context. |
---|
250 | * |
---|
251 | * @see _Watchdog_Insert(). |
---|
252 | */ |
---|
253 | void _Watchdog_Insert_locked( |
---|
254 | Watchdog_Header *header, |
---|
255 | Watchdog_Control *the_watchdog, |
---|
256 | ISR_lock_Context *lock_context |
---|
257 | ); |
---|
258 | |
---|
259 | /** |
---|
260 | * @brief This routine is invoked at appropriate intervals to update |
---|
261 | * the @a header watchdog chain. |
---|
262 | * |
---|
263 | * This routine is invoked at appropriate intervals to update |
---|
264 | * the @a header watchdog chain. |
---|
265 | * This routine decrements the delta counter in response to a tick. |
---|
266 | * |
---|
267 | * @param[in] header is the watchdog chain to tickle |
---|
268 | */ |
---|
269 | void _Watchdog_Tickle ( |
---|
270 | Watchdog_Header *header |
---|
271 | ); |
---|
272 | |
---|
273 | /** |
---|
274 | * @brief Pre-initializes a watchdog. |
---|
275 | * |
---|
276 | * This routine must be called before a watchdog is used in any way. The |
---|
277 | * exception are statically initialized watchdogs via WATCHDOG_INITIALIZER(). |
---|
278 | * |
---|
279 | * @param[in] the_watchdog The uninitialized watchdog. |
---|
280 | */ |
---|
281 | RTEMS_INLINE_ROUTINE void _Watchdog_Preinitialize( |
---|
282 | Watchdog_Control *the_watchdog |
---|
283 | ) |
---|
284 | { |
---|
285 | the_watchdog->state = WATCHDOG_INACTIVE; |
---|
286 | #if defined(RTEMS_DEBUG) |
---|
287 | the_watchdog->routine = NULL; |
---|
288 | the_watchdog->id = 0; |
---|
289 | the_watchdog->user_data = NULL; |
---|
290 | #endif |
---|
291 | } |
---|
292 | |
---|
293 | /** |
---|
294 | * This routine initializes the specified watchdog. The watchdog is |
---|
295 | * made inactive, the watchdog id and handler routine are set to the |
---|
296 | * specified values. |
---|
297 | */ |
---|
298 | |
---|
299 | RTEMS_INLINE_ROUTINE void _Watchdog_Initialize( |
---|
300 | Watchdog_Control *the_watchdog, |
---|
301 | Watchdog_Service_routine_entry routine, |
---|
302 | Objects_Id id, |
---|
303 | void *user_data |
---|
304 | ) |
---|
305 | { |
---|
306 | _Assert( the_watchdog->state == WATCHDOG_INACTIVE ); |
---|
307 | the_watchdog->routine = routine; |
---|
308 | the_watchdog->id = id; |
---|
309 | the_watchdog->user_data = user_data; |
---|
310 | } |
---|
311 | |
---|
312 | /** |
---|
313 | * This routine returns true if the watchdog timer is in the ACTIVE |
---|
314 | * state, and false otherwise. |
---|
315 | */ |
---|
316 | |
---|
317 | RTEMS_INLINE_ROUTINE bool _Watchdog_Is_active( |
---|
318 | Watchdog_Control *the_watchdog |
---|
319 | ) |
---|
320 | { |
---|
321 | |
---|
322 | return ( the_watchdog->state == WATCHDOG_ACTIVE ); |
---|
323 | |
---|
324 | } |
---|
325 | |
---|
326 | /** |
---|
327 | * This routine activates THE_WATCHDOG timer which is already |
---|
328 | * on a watchdog chain. |
---|
329 | */ |
---|
330 | |
---|
331 | RTEMS_INLINE_ROUTINE void _Watchdog_Activate( |
---|
332 | Watchdog_Control *the_watchdog |
---|
333 | ) |
---|
334 | { |
---|
335 | |
---|
336 | the_watchdog->state = WATCHDOG_ACTIVE; |
---|
337 | |
---|
338 | } |
---|
339 | |
---|
340 | /** |
---|
341 | * This routine is invoked at each clock tick to update the ticks |
---|
342 | * watchdog chain. |
---|
343 | */ |
---|
344 | |
---|
345 | RTEMS_INLINE_ROUTINE void _Watchdog_Tickle_ticks( void ) |
---|
346 | { |
---|
347 | |
---|
348 | _Watchdog_Tickle( &_Watchdog_Ticks_header ); |
---|
349 | |
---|
350 | } |
---|
351 | |
---|
352 | /** |
---|
353 | * This routine is invoked at each clock tick to update the seconds |
---|
354 | * watchdog chain. |
---|
355 | */ |
---|
356 | |
---|
357 | RTEMS_INLINE_ROUTINE void _Watchdog_Tickle_seconds( void ) |
---|
358 | { |
---|
359 | |
---|
360 | _Watchdog_Tickle( &_Watchdog_Seconds_header ); |
---|
361 | |
---|
362 | } |
---|
363 | |
---|
364 | /** |
---|
365 | * This routine inserts THE_WATCHDOG into the ticks watchdog chain |
---|
366 | * for a time of UNITS ticks. The INSERT_MODE indicates whether |
---|
367 | * THE_WATCHDOG is to be activated automatically or later, explicitly |
---|
368 | * by the caller. |
---|
369 | */ |
---|
370 | |
---|
371 | RTEMS_INLINE_ROUTINE void _Watchdog_Insert_ticks( |
---|
372 | Watchdog_Control *the_watchdog, |
---|
373 | Watchdog_Interval units |
---|
374 | ) |
---|
375 | { |
---|
376 | |
---|
377 | the_watchdog->initial = units; |
---|
378 | |
---|
379 | _Watchdog_Insert( &_Watchdog_Ticks_header, the_watchdog ); |
---|
380 | |
---|
381 | } |
---|
382 | |
---|
383 | /** |
---|
384 | * This routine inserts THE_WATCHDOG into the seconds watchdog chain |
---|
385 | * for a time of UNITS seconds. The INSERT_MODE indicates whether |
---|
386 | * THE_WATCHDOG is to be activated automatically or later, explicitly |
---|
387 | * by the caller. |
---|
388 | */ |
---|
389 | |
---|
390 | RTEMS_INLINE_ROUTINE void _Watchdog_Insert_seconds( |
---|
391 | Watchdog_Control *the_watchdog, |
---|
392 | Watchdog_Interval units |
---|
393 | ) |
---|
394 | { |
---|
395 | |
---|
396 | the_watchdog->initial = units; |
---|
397 | |
---|
398 | _Watchdog_Insert( &_Watchdog_Seconds_header, the_watchdog ); |
---|
399 | |
---|
400 | } |
---|
401 | |
---|
402 | RTEMS_INLINE_ROUTINE Watchdog_States _Watchdog_Remove_ticks( |
---|
403 | Watchdog_Control *the_watchdog |
---|
404 | ) |
---|
405 | { |
---|
406 | return _Watchdog_Remove( &_Watchdog_Ticks_header, the_watchdog ); |
---|
407 | } |
---|
408 | |
---|
409 | RTEMS_INLINE_ROUTINE Watchdog_States _Watchdog_Remove_seconds( |
---|
410 | Watchdog_Control *the_watchdog |
---|
411 | ) |
---|
412 | { |
---|
413 | return _Watchdog_Remove( &_Watchdog_Seconds_header, the_watchdog ); |
---|
414 | } |
---|
415 | |
---|
416 | /** |
---|
417 | * This routine resets THE_WATCHDOG timer to its state at INSERT |
---|
418 | * time. This routine is valid only on interval watchdog timers |
---|
419 | * and is used to make an interval watchdog timer fire "every" so |
---|
420 | * many ticks. |
---|
421 | */ |
---|
422 | |
---|
423 | RTEMS_INLINE_ROUTINE void _Watchdog_Reset_ticks( |
---|
424 | Watchdog_Control *the_watchdog |
---|
425 | ) |
---|
426 | { |
---|
427 | |
---|
428 | _Watchdog_Remove_ticks( the_watchdog ); |
---|
429 | |
---|
430 | _Watchdog_Insert( &_Watchdog_Ticks_header, the_watchdog ); |
---|
431 | |
---|
432 | } |
---|
433 | |
---|
434 | /** |
---|
435 | * This routine returns a pointer to the watchdog timer following |
---|
436 | * THE_WATCHDOG on the watchdog chain. |
---|
437 | */ |
---|
438 | |
---|
439 | RTEMS_INLINE_ROUTINE Watchdog_Control *_Watchdog_Next( |
---|
440 | Watchdog_Control *the_watchdog |
---|
441 | ) |
---|
442 | { |
---|
443 | |
---|
444 | return ( (Watchdog_Control *) the_watchdog->Node.next ); |
---|
445 | |
---|
446 | } |
---|
447 | |
---|
448 | /** |
---|
449 | * This routine returns a pointer to the watchdog timer preceding |
---|
450 | * THE_WATCHDOG on the watchdog chain. |
---|
451 | */ |
---|
452 | |
---|
453 | RTEMS_INLINE_ROUTINE Watchdog_Control *_Watchdog_Previous( |
---|
454 | Watchdog_Control *the_watchdog |
---|
455 | ) |
---|
456 | { |
---|
457 | |
---|
458 | return ( (Watchdog_Control *) the_watchdog->Node.previous ); |
---|
459 | |
---|
460 | } |
---|
461 | |
---|
462 | /** |
---|
463 | * This routine returns a pointer to the first watchdog timer |
---|
464 | * on the watchdog chain HEADER. |
---|
465 | */ |
---|
466 | |
---|
467 | RTEMS_INLINE_ROUTINE Watchdog_Control *_Watchdog_First( |
---|
468 | Watchdog_Header *header |
---|
469 | ) |
---|
470 | { |
---|
471 | |
---|
472 | return ( (Watchdog_Control *) _Chain_First( &header->Watchdogs ) ); |
---|
473 | |
---|
474 | } |
---|
475 | |
---|
476 | /** |
---|
477 | * This routine returns a pointer to the last watchdog timer |
---|
478 | * on the watchdog chain HEADER. |
---|
479 | */ |
---|
480 | |
---|
481 | RTEMS_INLINE_ROUTINE Watchdog_Control *_Watchdog_Last( |
---|
482 | Watchdog_Header *header |
---|
483 | ) |
---|
484 | { |
---|
485 | |
---|
486 | return ( (Watchdog_Control *) _Chain_Last( &header->Watchdogs ) ); |
---|
487 | |
---|
488 | } |
---|
489 | |
---|
490 | RTEMS_INLINE_ROUTINE bool _Watchdog_Is_empty( |
---|
491 | const Watchdog_Header *header |
---|
492 | ) |
---|
493 | { |
---|
494 | return _Chain_Is_empty( &header->Watchdogs ); |
---|
495 | } |
---|
496 | |
---|
497 | RTEMS_INLINE_ROUTINE void _Watchdog_Header_initialize( |
---|
498 | Watchdog_Header *header |
---|
499 | ) |
---|
500 | { |
---|
501 | _ISR_lock_Initialize( &header->Lock, "Watchdog" ); |
---|
502 | _Chain_Initialize_empty( &header->Watchdogs ); |
---|
503 | _Chain_Initialize_empty( &header->Iterators ); |
---|
504 | } |
---|
505 | |
---|
506 | /** @} */ |
---|
507 | |
---|
508 | #ifdef __cplusplus |
---|
509 | } |
---|
510 | #endif |
---|
511 | |
---|
512 | #endif |
---|
513 | /* end of include file */ |
---|