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1 | /* interrupt.h */ |
2 | #ifndef _LINUX_INTERRUPT_H |
3 | #define _LINUX_INTERRUPT_H |
4 | |
5 | #include <linux/kernel.h> |
6 | #include <linux/linkage.h> |
7 | #include <linux/bitops.h> |
8 | #include <linux/preempt.h> |
9 | #include <linux/cpumask.h> |
10 | #include <linux/irqreturn.h> |
11 | #include <linux/irqnr.h> |
12 | #include <linux/hardirq.h> |
13 | #include <linux/irqflags.h> |
14 | #include <linux/smp.h> |
15 | #include <linux/percpu.h> |
16 | #include <linux/hrtimer.h> |
17 | |
18 | #include <asm/atomic.h> |
19 | #include <asm/ptrace.h> |
20 | #include <asm/system.h> |
21 | |
22 | /* |
23 | * These correspond to the IORESOURCE_IRQ_* defines in |
24 | * linux/ioport.h to select the interrupt line behaviour. When |
25 | * requesting an interrupt without specifying a IRQF_TRIGGER, the |
26 | * setting should be assumed to be "as already configured", which |
27 | * may be as per machine or firmware initialisation. |
28 | */ |
29 | #define IRQF_TRIGGER_NONE 0x00000000 |
30 | #define IRQF_TRIGGER_RISING 0x00000001 |
31 | #define IRQF_TRIGGER_FALLING 0x00000002 |
32 | #define IRQF_TRIGGER_HIGH 0x00000004 |
33 | #define IRQF_TRIGGER_LOW 0x00000008 |
34 | #define IRQF_TRIGGER_MASK (IRQF_TRIGGER_HIGH | IRQF_TRIGGER_LOW | \ |
35 | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING) |
36 | #define IRQF_TRIGGER_PROBE 0x00000010 |
37 | |
38 | /* |
39 | * These flags used only by the kernel as part of the |
40 | * irq handling routines. |
41 | * |
42 | * IRQF_DISABLED - keep irqs disabled when calling the action handler |
43 | * IRQF_SAMPLE_RANDOM - irq is used to feed the random generator |
44 | * IRQF_SHARED - allow sharing the irq among several devices |
45 | * IRQF_PROBE_SHARED - set by callers when they expect sharing mismatches to occur |
46 | * IRQF_TIMER - Flag to mark this interrupt as timer interrupt |
47 | * IRQF_PERCPU - Interrupt is per cpu |
48 | * IRQF_NOBALANCING - Flag to exclude this interrupt from irq balancing |
49 | * IRQF_IRQPOLL - Interrupt is used for polling (only the interrupt that is |
50 | * registered first in an shared interrupt is considered for |
51 | * performance reasons) |
52 | * IRQF_ONESHOT - Interrupt is not reenabled after the hardirq handler finished. |
53 | * Used by threaded interrupts which need to keep the |
54 | * irq line disabled until the threaded handler has been run. |
55 | */ |
56 | #define IRQF_DISABLED 0x00000020 |
57 | #define IRQF_SAMPLE_RANDOM 0x00000040 |
58 | #define IRQF_SHARED 0x00000080 |
59 | #define IRQF_PROBE_SHARED 0x00000100 |
60 | #define IRQF_TIMER 0x00000200 |
61 | #define IRQF_PERCPU 0x00000400 |
62 | #define IRQF_NOBALANCING 0x00000800 |
63 | #define IRQF_IRQPOLL 0x00001000 |
64 | #define IRQF_ONESHOT 0x00002000 |
65 | |
66 | /* |
67 | * Bits used by threaded handlers: |
68 | * IRQTF_RUNTHREAD - signals that the interrupt handler thread should run |
69 | * IRQTF_DIED - handler thread died |
70 | * IRQTF_WARNED - warning "IRQ_WAKE_THREAD w/o thread_fn" has been printed |
71 | * IRQTF_AFFINITY - irq thread is requested to adjust affinity |
72 | */ |
73 | enum { |
74 | IRQTF_RUNTHREAD, |
75 | IRQTF_DIED, |
76 | IRQTF_WARNED, |
77 | IRQTF_AFFINITY, |
78 | }; |
79 | |
80 | typedef irqreturn_t (*irq_handler_t)(int, void *); |
81 | |
82 | /** |
83 | * struct irqaction - per interrupt action descriptor |
84 | * @handler: interrupt handler function |
85 | * @flags: flags (see IRQF_* above) |
86 | * @name: name of the device |
87 | * @dev_id: cookie to identify the device |
88 | * @next: pointer to the next irqaction for shared interrupts |
89 | * @irq: interrupt number |
90 | * @dir: pointer to the proc/irq/NN/name entry |
91 | * @thread_fn: interupt handler function for threaded interrupts |
92 | * @thread: thread pointer for threaded interrupts |
93 | * @thread_flags: flags related to @thread |
94 | */ |
95 | struct irqaction { |
96 | irq_handler_t handler; |
97 | unsigned long flags; |
98 | const char *name; |
99 | void *dev_id; |
100 | struct irqaction *next; |
101 | int irq; |
102 | struct proc_dir_entry *dir; |
103 | irq_handler_t thread_fn; |
104 | struct task_struct *thread; |
105 | unsigned long thread_flags; |
106 | }; |
107 | |
108 | extern irqreturn_t no_action(int cpl, void *dev_id); |
109 | |
110 | #ifdef CONFIG_GENERIC_HARDIRQS |
111 | extern int __must_check |
112 | request_threaded_irq(unsigned int irq, irq_handler_t handler, |
113 | irq_handler_t thread_fn, |
114 | unsigned long flags, const char *name, void *dev); |
115 | |
116 | static inline int __must_check |
117 | request_irq(unsigned int irq, irq_handler_t handler, unsigned long flags, |
118 | const char *name, void *dev) |
119 | { |
120 | return request_threaded_irq(irq, handler, NULL, flags, name, dev); |
121 | } |
122 | |
123 | extern void exit_irq_thread(void); |
124 | #else |
125 | |
126 | extern int __must_check |
127 | request_irq(unsigned int irq, irq_handler_t handler, unsigned long flags, |
128 | const char *name, void *dev); |
129 | |
130 | /* |
131 | * Special function to avoid ifdeffery in kernel/irq/devres.c which |
132 | * gets magically built by GENERIC_HARDIRQS=n architectures (sparc, |
133 | * m68k). I really love these $@%#!* obvious Makefile references: |
134 | * ../../../kernel/irq/devres.o |
135 | */ |
136 | static inline int __must_check |
137 | request_threaded_irq(unsigned int irq, irq_handler_t handler, |
138 | irq_handler_t thread_fn, |
139 | unsigned long flags, const char *name, void *dev) |
140 | { |
141 | return request_irq(irq, handler, flags, name, dev); |
142 | } |
143 | |
144 | static inline void exit_irq_thread(void) { } |
145 | #endif |
146 | |
147 | extern void free_irq(unsigned int, void *); |
148 | |
149 | struct device; |
150 | |
151 | extern int __must_check |
152 | devm_request_threaded_irq(struct device *dev, unsigned int irq, |
153 | irq_handler_t handler, irq_handler_t thread_fn, |
154 | unsigned long irqflags, const char *devname, |
155 | void *dev_id); |
156 | |
157 | static inline int __must_check |
158 | devm_request_irq(struct device *dev, unsigned int irq, irq_handler_t handler, |
159 | unsigned long irqflags, const char *devname, void *dev_id) |
160 | { |
161 | return devm_request_threaded_irq(dev, irq, handler, NULL, irqflags, |
162 | devname, dev_id); |
163 | } |
164 | |
165 | extern void devm_free_irq(struct device *dev, unsigned int irq, void *dev_id); |
166 | |
167 | /* |
168 | * On lockdep we dont want to enable hardirqs in hardirq |
169 | * context. Use local_irq_enable_in_hardirq() to annotate |
170 | * kernel code that has to do this nevertheless (pretty much |
171 | * the only valid case is for old/broken hardware that is |
172 | * insanely slow). |
173 | * |
174 | * NOTE: in theory this might break fragile code that relies |
175 | * on hardirq delivery - in practice we dont seem to have such |
176 | * places left. So the only effect should be slightly increased |
177 | * irqs-off latencies. |
178 | */ |
179 | #ifdef CONFIG_LOCKDEP |
180 | # define local_irq_enable_in_hardirq() do { } while (0) |
181 | #else |
182 | # define local_irq_enable_in_hardirq() local_irq_enable() |
183 | #endif |
184 | |
185 | extern void disable_irq_nosync(unsigned int irq); |
186 | extern void disable_irq(unsigned int irq); |
187 | extern void enable_irq(unsigned int irq); |
188 | |
189 | /* The following three functions are for the core kernel use only. */ |
190 | #ifdef CONFIG_GENERIC_HARDIRQS |
191 | extern void suspend_device_irqs(void); |
192 | extern void resume_device_irqs(void); |
193 | #ifdef CONFIG_PM_SLEEP |
194 | extern int check_wakeup_irqs(void); |
195 | #else |
196 | static inline int check_wakeup_irqs(void) { return 0; } |
197 | #endif |
198 | #else |
199 | static inline void suspend_device_irqs(void) { }; |
200 | static inline void resume_device_irqs(void) { }; |
201 | static inline int check_wakeup_irqs(void) { return 0; } |
202 | #endif |
203 | |
204 | #if defined(CONFIG_SMP) && defined(CONFIG_GENERIC_HARDIRQS) |
205 | |
206 | extern cpumask_var_t irq_default_affinity; |
207 | |
208 | extern int irq_set_affinity(unsigned int irq, const struct cpumask *cpumask); |
209 | extern int irq_can_set_affinity(unsigned int irq); |
210 | extern int irq_select_affinity(unsigned int irq); |
211 | |
212 | #else /* CONFIG_SMP */ |
213 | |
214 | static inline int irq_set_affinity(unsigned int irq, const struct cpumask *m) |
215 | { |
216 | return -EINVAL; |
217 | } |
218 | |
219 | static inline int irq_can_set_affinity(unsigned int irq) |
220 | { |
221 | return 0; |
222 | } |
223 | |
224 | static inline int irq_select_affinity(unsigned int irq) { return 0; } |
225 | |
226 | #endif /* CONFIG_SMP && CONFIG_GENERIC_HARDIRQS */ |
227 | |
228 | #ifdef CONFIG_GENERIC_HARDIRQS |
229 | /* |
230 | * Special lockdep variants of irq disabling/enabling. |
231 | * These should be used for locking constructs that |
232 | * know that a particular irq context which is disabled, |
233 | * and which is the only irq-context user of a lock, |
234 | * that it's safe to take the lock in the irq-disabled |
235 | * section without disabling hardirqs. |
236 | * |
237 | * On !CONFIG_LOCKDEP they are equivalent to the normal |
238 | * irq disable/enable methods. |
239 | */ |
240 | static inline void disable_irq_nosync_lockdep(unsigned int irq) |
241 | { |
242 | disable_irq_nosync(irq); |
243 | #ifdef CONFIG_LOCKDEP |
244 | local_irq_disable(); |
245 | #endif |
246 | } |
247 | |
248 | static inline void disable_irq_nosync_lockdep_irqsave(unsigned int irq, unsigned long *flags) |
249 | { |
250 | disable_irq_nosync(irq); |
251 | #ifdef CONFIG_LOCKDEP |
252 | local_irq_save(*flags); |
253 | #endif |
254 | } |
255 | |
256 | static inline void disable_irq_lockdep(unsigned int irq) |
257 | { |
258 | disable_irq(irq); |
259 | #ifdef CONFIG_LOCKDEP |
260 | local_irq_disable(); |
261 | #endif |
262 | } |
263 | |
264 | static inline void enable_irq_lockdep(unsigned int irq) |
265 | { |
266 | #ifdef CONFIG_LOCKDEP |
267 | local_irq_enable(); |
268 | #endif |
269 | enable_irq(irq); |
270 | } |
271 | |
272 | static inline void enable_irq_lockdep_irqrestore(unsigned int irq, unsigned long *flags) |
273 | { |
274 | #ifdef CONFIG_LOCKDEP |
275 | local_irq_restore(*flags); |
276 | #endif |
277 | enable_irq(irq); |
278 | } |
279 | |
280 | /* IRQ wakeup (PM) control: */ |
281 | extern int set_irq_wake(unsigned int irq, unsigned int on); |
282 | |
283 | static inline int enable_irq_wake(unsigned int irq) |
284 | { |
285 | return set_irq_wake(irq, 1); |
286 | } |
287 | |
288 | static inline int disable_irq_wake(unsigned int irq) |
289 | { |
290 | return set_irq_wake(irq, 0); |
291 | } |
292 | |
293 | #else /* !CONFIG_GENERIC_HARDIRQS */ |
294 | /* |
295 | * NOTE: non-genirq architectures, if they want to support the lock |
296 | * validator need to define the methods below in their asm/irq.h |
297 | * files, under an #ifdef CONFIG_LOCKDEP section. |
298 | */ |
299 | #ifndef CONFIG_LOCKDEP |
300 | # define disable_irq_nosync_lockdep(irq) disable_irq_nosync(irq) |
301 | # define disable_irq_nosync_lockdep_irqsave(irq, flags) \ |
302 | disable_irq_nosync(irq) |
303 | # define disable_irq_lockdep(irq) disable_irq(irq) |
304 | # define enable_irq_lockdep(irq) enable_irq(irq) |
305 | # define enable_irq_lockdep_irqrestore(irq, flags) \ |
306 | enable_irq(irq) |
307 | # endif |
308 | |
309 | static inline int enable_irq_wake(unsigned int irq) |
310 | { |
311 | return 0; |
312 | } |
313 | |
314 | static inline int disable_irq_wake(unsigned int irq) |
315 | { |
316 | return 0; |
317 | } |
318 | #endif /* CONFIG_GENERIC_HARDIRQS */ |
319 | |
320 | #ifndef __ARCH_SET_SOFTIRQ_PENDING |
321 | #define set_softirq_pending(x) (local_softirq_pending() = (x)) |
322 | #define or_softirq_pending(x) (local_softirq_pending() |= (x)) |
323 | #endif |
324 | |
325 | /* Some architectures might implement lazy enabling/disabling of |
326 | * interrupts. In some cases, such as stop_machine, we might want |
327 | * to ensure that after a local_irq_disable(), interrupts have |
328 | * really been disabled in hardware. Such architectures need to |
329 | * implement the following hook. |
330 | */ |
331 | #ifndef hard_irq_disable |
332 | #define hard_irq_disable() do { } while(0) |
333 | #endif |
334 | |
335 | /* PLEASE, avoid to allocate new softirqs, if you need not _really_ high |
336 | frequency threaded job scheduling. For almost all the purposes |
337 | tasklets are more than enough. F.e. all serial device BHs et |
338 | al. should be converted to tasklets, not to softirqs. |
339 | */ |
340 | |
341 | enum |
342 | { |
343 | HI_SOFTIRQ=0, |
344 | TIMER_SOFTIRQ, |
345 | NET_TX_SOFTIRQ, |
346 | NET_RX_SOFTIRQ, |
347 | BLOCK_SOFTIRQ, |
348 | BLOCK_IOPOLL_SOFTIRQ, |
349 | TASKLET_SOFTIRQ, |
350 | SCHED_SOFTIRQ, |
351 | HRTIMER_SOFTIRQ, |
352 | RCU_SOFTIRQ, /* Preferable RCU should always be the last softirq */ |
353 | |
354 | NR_SOFTIRQS |
355 | }; |
356 | |
357 | /* map softirq index to softirq name. update 'softirq_to_name' in |
358 | * kernel/softirq.c when adding a new softirq. |
359 | */ |
360 | extern char *softirq_to_name[NR_SOFTIRQS]; |
361 | |
362 | /* softirq mask and active fields moved to irq_cpustat_t in |
363 | * asm/hardirq.h to get better cache usage. KAO |
364 | */ |
365 | |
366 | struct softirq_action |
367 | { |
368 | void (*action)(struct softirq_action *); |
369 | }; |
370 | |
371 | asmlinkage void do_softirq(void); |
372 | asmlinkage void __do_softirq(void); |
373 | extern void open_softirq(int nr, void (*action)(struct softirq_action *)); |
374 | extern void softirq_init(void); |
375 | #define __raise_softirq_irqoff(nr) do { or_softirq_pending(1UL << (nr)); } while (0) |
376 | extern void raise_softirq_irqoff(unsigned int nr); |
377 | extern void raise_softirq(unsigned int nr); |
378 | extern void wakeup_softirqd(void); |
379 | |
380 | /* This is the worklist that queues up per-cpu softirq work. |
381 | * |
382 | * send_remote_sendirq() adds work to these lists, and |
383 | * the softirq handler itself dequeues from them. The queues |
384 | * are protected by disabling local cpu interrupts and they must |
385 | * only be accessed by the local cpu that they are for. |
386 | */ |
387 | DECLARE_PER_CPU(struct list_head [NR_SOFTIRQS], softirq_work_list); |
388 | |
389 | /* Try to send a softirq to a remote cpu. If this cannot be done, the |
390 | * work will be queued to the local cpu. |
391 | */ |
392 | extern void send_remote_softirq(struct call_single_data *cp, int cpu, int softirq); |
393 | |
394 | /* Like send_remote_softirq(), but the caller must disable local cpu interrupts |
395 | * and compute the current cpu, passed in as 'this_cpu'. |
396 | */ |
397 | extern void __send_remote_softirq(struct call_single_data *cp, int cpu, |
398 | int this_cpu, int softirq); |
399 | |
400 | /* Tasklets --- multithreaded analogue of BHs. |
401 | |
402 | Main feature differing them of generic softirqs: tasklet |
403 | is running only on one CPU simultaneously. |
404 | |
405 | Main feature differing them of BHs: different tasklets |
406 | may be run simultaneously on different CPUs. |
407 | |
408 | Properties: |
409 | * If tasklet_schedule() is called, then tasklet is guaranteed |
410 | to be executed on some cpu at least once after this. |
411 | * If the tasklet is already scheduled, but its excecution is still not |
412 | started, it will be executed only once. |
413 | * If this tasklet is already running on another CPU (or schedule is called |
414 | from tasklet itself), it is rescheduled for later. |
415 | * Tasklet is strictly serialized wrt itself, but not |
416 | wrt another tasklets. If client needs some intertask synchronization, |
417 | he makes it with spinlocks. |
418 | */ |
419 | |
420 | struct tasklet_struct |
421 | { |
422 | struct tasklet_struct *next; |
423 | unsigned long state; |
424 | atomic_t count; |
425 | void (*func)(unsigned long); |
426 | unsigned long data; |
427 | }; |
428 | |
429 | #define DECLARE_TASKLET(name, func, data) \ |
430 | struct tasklet_struct name = { NULL, 0, ATOMIC_INIT(0), func, data } |
431 | |
432 | #define DECLARE_TASKLET_DISABLED(name, func, data) \ |
433 | struct tasklet_struct name = { NULL, 0, ATOMIC_INIT(1), func, data } |
434 | |
435 | |
436 | enum |
437 | { |
438 | TASKLET_STATE_SCHED, /* Tasklet is scheduled for execution */ |
439 | TASKLET_STATE_RUN /* Tasklet is running (SMP only) */ |
440 | }; |
441 | |
442 | #ifdef CONFIG_SMP |
443 | static inline int tasklet_trylock(struct tasklet_struct *t) |
444 | { |
445 | return !test_and_set_bit(TASKLET_STATE_RUN, &(t)->state); |
446 | } |
447 | |
448 | static inline void tasklet_unlock(struct tasklet_struct *t) |
449 | { |
450 | smp_mb__before_clear_bit(); |
451 | clear_bit(TASKLET_STATE_RUN, &(t)->state); |
452 | } |
453 | |
454 | static inline void tasklet_unlock_wait(struct tasklet_struct *t) |
455 | { |
456 | while (test_bit(TASKLET_STATE_RUN, &(t)->state)) { barrier(); } |
457 | } |
458 | #else |
459 | #define tasklet_trylock(t) 1 |
460 | #define tasklet_unlock_wait(t) do { } while (0) |
461 | #define tasklet_unlock(t) do { } while (0) |
462 | #endif |
463 | |
464 | extern void __tasklet_schedule(struct tasklet_struct *t); |
465 | |
466 | static inline void tasklet_schedule(struct tasklet_struct *t) |
467 | { |
468 | if (!test_and_set_bit(TASKLET_STATE_SCHED, &t->state)) |
469 | __tasklet_schedule(t); |
470 | } |
471 | |
472 | extern void __tasklet_hi_schedule(struct tasklet_struct *t); |
473 | |
474 | static inline void tasklet_hi_schedule(struct tasklet_struct *t) |
475 | { |
476 | if (!test_and_set_bit(TASKLET_STATE_SCHED, &t->state)) |
477 | __tasklet_hi_schedule(t); |
478 | } |
479 | |
480 | extern void __tasklet_hi_schedule_first(struct tasklet_struct *t); |
481 | |
482 | /* |
483 | * This version avoids touching any other tasklets. Needed for kmemcheck |
484 | * in order not to take any page faults while enqueueing this tasklet; |
485 | * consider VERY carefully whether you really need this or |
486 | * tasklet_hi_schedule()... |
487 | */ |
488 | static inline void tasklet_hi_schedule_first(struct tasklet_struct *t) |
489 | { |
490 | if (!test_and_set_bit(TASKLET_STATE_SCHED, &t->state)) |
491 | __tasklet_hi_schedule_first(t); |
492 | } |
493 | |
494 | |
495 | static inline void tasklet_disable_nosync(struct tasklet_struct *t) |
496 | { |
497 | atomic_inc(&t->count); |
498 | smp_mb__after_atomic_inc(); |
499 | } |
500 | |
501 | static inline void tasklet_disable(struct tasklet_struct *t) |
502 | { |
503 | tasklet_disable_nosync(t); |
504 | tasklet_unlock_wait(t); |
505 | smp_mb(); |
506 | } |
507 | |
508 | static inline void tasklet_enable(struct tasklet_struct *t) |
509 | { |
510 | smp_mb__before_atomic_dec(); |
511 | atomic_dec(&t->count); |
512 | } |
513 | |
514 | static inline void tasklet_hi_enable(struct tasklet_struct *t) |
515 | { |
516 | smp_mb__before_atomic_dec(); |
517 | atomic_dec(&t->count); |
518 | } |
519 | |
520 | extern void tasklet_kill(struct tasklet_struct *t); |
521 | extern void tasklet_kill_immediate(struct tasklet_struct *t, unsigned int cpu); |
522 | extern void tasklet_init(struct tasklet_struct *t, |
523 | void (*func)(unsigned long), unsigned long data); |
524 | |
525 | struct tasklet_hrtimer { |
526 | struct hrtimer timer; |
527 | struct tasklet_struct tasklet; |
528 | enum hrtimer_restart (*function)(struct hrtimer *); |
529 | }; |
530 | |
531 | extern void |
532 | tasklet_hrtimer_init(struct tasklet_hrtimer *ttimer, |
533 | enum hrtimer_restart (*function)(struct hrtimer *), |
534 | clockid_t which_clock, enum hrtimer_mode mode); |
535 | |
536 | static inline |
537 | int tasklet_hrtimer_start(struct tasklet_hrtimer *ttimer, ktime_t time, |
538 | const enum hrtimer_mode mode) |
539 | { |
540 | return hrtimer_start(&ttimer->timer, time, mode); |
541 | } |
542 | |
543 | static inline |
544 | void tasklet_hrtimer_cancel(struct tasklet_hrtimer *ttimer) |
545 | { |
546 | hrtimer_cancel(&ttimer->timer); |
547 | tasklet_kill(&ttimer->tasklet); |
548 | } |
549 | |
550 | /* |
551 | * Autoprobing for irqs: |
552 | * |
553 | * probe_irq_on() and probe_irq_off() provide robust primitives |
554 | * for accurate IRQ probing during kernel initialization. They are |
555 | * reasonably simple to use, are not "fooled" by spurious interrupts, |
556 | * and, unlike other attempts at IRQ probing, they do not get hung on |
557 | * stuck interrupts (such as unused PS2 mouse interfaces on ASUS boards). |
558 | * |
559 | * For reasonably foolproof probing, use them as follows: |
560 | * |
561 | * 1. clear and/or mask the device's internal interrupt. |
562 | * 2. sti(); |
563 | * 3. irqs = probe_irq_on(); // "take over" all unassigned idle IRQs |
564 | * 4. enable the device and cause it to trigger an interrupt. |
565 | * 5. wait for the device to interrupt, using non-intrusive polling or a delay. |
566 | * 6. irq = probe_irq_off(irqs); // get IRQ number, 0=none, negative=multiple |
567 | * 7. service the device to clear its pending interrupt. |
568 | * 8. loop again if paranoia is required. |
569 | * |
570 | * probe_irq_on() returns a mask of allocated irq's. |
571 | * |
572 | * probe_irq_off() takes the mask as a parameter, |
573 | * and returns the irq number which occurred, |
574 | * or zero if none occurred, or a negative irq number |
575 | * if more than one irq occurred. |
576 | */ |
577 | |
578 | #if defined(CONFIG_GENERIC_HARDIRQS) && !defined(CONFIG_GENERIC_IRQ_PROBE) |
579 | static inline unsigned long probe_irq_on(void) |
580 | { |
581 | return 0; |
582 | } |
583 | static inline int probe_irq_off(unsigned long val) |
584 | { |
585 | return 0; |
586 | } |
587 | static inline unsigned int probe_irq_mask(unsigned long val) |
588 | { |
589 | return 0; |
590 | } |
591 | #else |
592 | extern unsigned long probe_irq_on(void); /* returns 0 on failure */ |
593 | extern int probe_irq_off(unsigned long); /* returns 0 or negative on failure */ |
594 | extern unsigned int probe_irq_mask(unsigned long); /* returns mask of ISA interrupts */ |
595 | #endif |
596 | |
597 | #ifdef CONFIG_PROC_FS |
598 | /* Initialize /proc/irq/ */ |
599 | extern void init_irq_proc(void); |
600 | #else |
601 | static inline void init_irq_proc(void) |
602 | { |
603 | } |
604 | #endif |
605 | |
606 | #if defined(CONFIG_GENERIC_HARDIRQS) && defined(CONFIG_DEBUG_SHIRQ) |
607 | extern void debug_poll_all_shared_irqs(void); |
608 | #else |
609 | static inline void debug_poll_all_shared_irqs(void) { } |
610 | #endif |
611 | |
612 | struct seq_file; |
613 | int show_interrupts(struct seq_file *p, void *v); |
614 | |
615 | struct irq_desc; |
616 | |
617 | extern int early_irq_init(void); |
618 | extern int arch_probe_nr_irqs(void); |
619 | extern int arch_early_irq_init(void); |
620 | extern int arch_init_chip_data(struct irq_desc *desc, int node); |
621 | |
622 | #endif |
623 |
Branches:
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javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9