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CRIS: Fasttimer: Remove obsolete ifdef
[net-next-2.6.git] / arch / cris / arch-v10 / kernel / fasttimer.c
CommitLineData
d8e5219f 1/*
1da177e4
LT		 2 * linux/arch/cris/kernel/fasttimer.c
3 *
4 * Fast timers for ETRAX100/ETRAX100LX
1da177e4 5 *
d8e5219f 6 * Copyright (C) 2000-2007 Axis Communications AB, Lund, Sweden
1da177e4
LT		 7 */
8
9#include <linux/errno.h>
10#include <linux/sched.h>
11#include <linux/kernel.h>
12#include <linux/param.h>
13#include <linux/string.h>
14#include <linux/mm.h>
15#include <linux/vmalloc.h>
16#include <linux/interrupt.h>
17#include <linux/time.h>
18#include <linux/delay.h>
19
20#include <asm/segment.h>
21#include <asm/io.h>
22#include <asm/irq.h>
23#include <asm/delay.h>
24#include <asm/rtc.h>
25
1da177e4 26
556dcee7 27#include <arch/svinto.h>
1da177e4
LT		 28#include <asm/fasttimer.h>
29#include <linux/proc_fs.h>
30
31
32#define DEBUG_LOG_INCLUDED
33#define FAST_TIMER_LOG
4200c35d 34/* #define FAST_TIMER_TEST */
1da177e4
LT		 35
36#define FAST_TIMER_SANITY_CHECKS
37
38#ifdef FAST_TIMER_SANITY_CHECKS
d8e5219f 39static int sanity_failed;
1da177e4
LT		 40#endif
41
42#define D1(x)
43#define D2(x)
44#define DP(x)
45
d8e5219f
JN		 46static unsigned int fast_timer_running;
47static unsigned int fast_timers_added;
48static unsigned int fast_timers_started;
49static unsigned int fast_timers_expired;
50static unsigned int fast_timers_deleted;
51static unsigned int fast_timer_is_init;
52static unsigned int fast_timer_ints;
1da177e4
LT		 53
54struct fast_timer *fast_timer_list = NULL;
55
56#ifdef DEBUG_LOG_INCLUDED
57#define DEBUG_LOG_MAX 128
58static const char * debug_log_string[DEBUG_LOG_MAX];
59static unsigned long debug_log_value[DEBUG_LOG_MAX];
d8e5219f
JN		 60static unsigned int debug_log_cnt;
61static unsigned int debug_log_cnt_wrapped;
1da177e4
LT		 62
63#define DEBUG_LOG(string, value) \
64{ \
65 unsigned long log_flags; \
7e920426 66 local_irq_save(log_flags); \
1da177e4
LT		 67 debug_log_string[debug_log_cnt] = (string); \
68 debug_log_value[debug_log_cnt] = (unsigned long)(value); \
69 if (++debug_log_cnt >= DEBUG_LOG_MAX) \
70 { \
71 debug_log_cnt = debug_log_cnt % DEBUG_LOG_MAX; \
72 debug_log_cnt_wrapped = 1; \
73 } \
7e920426 74 local_irq_restore(log_flags); \
1da177e4
LT		 75}
76#else
77#define DEBUG_LOG(string, value)
78#endif
79
80
81/* The frequencies for index = clkselx number in R_TIMER_CTRL */
82#define NUM_TIMER_FREQ 15
83#define MAX_USABLE_TIMER_FREQ 7
84#define MAX_DELAY_US 853333L
85const unsigned long timer_freq_100[NUM_TIMER_FREQ] =
86{
87 3, /* 0 3333 - 853333 us */
88 6, /* 1 1666 - 426666 us */
89 12, /* 2 833 - 213333 us */
90 24, /* 3 416 - 106666 us */
91 48, /* 4 208 - 53333 us */
92 96, /* 5 104 - 26666 us */
93 192, /* 6 52 - 13333 us */
94 384, /* 7 26 - 6666 us */
95 576,
96 1152,
97 2304,
98 4608,
99 9216,
100 18432,
101 62500,
102 /* 15 = cascade */
103};
104#define NUM_TIMER_STATS 16
105#ifdef FAST_TIMER_LOG
106struct fast_timer timer_added_log[NUM_TIMER_STATS];
107struct fast_timer timer_started_log[NUM_TIMER_STATS];
108struct fast_timer timer_expired_log[NUM_TIMER_STATS];
109#endif
110
111int timer_div_settings[NUM_TIMER_STATS];
112int timer_freq_settings[NUM_TIMER_STATS];
113int timer_delay_settings[NUM_TIMER_STATS];
114
115/* Not true gettimeofday, only checks the jiffies (uptime) + useconds */
2f1f53bd 116inline void do_gettimeofday_fast(struct fasttime_t *tv)
1da177e4 117{
d8e5219f
JN		 118 tv->tv_jiff = jiffies;
119 tv->tv_usec = GET_JIFFIES_USEC();
1da177e4
LT		 120}
121
2f1f53bd 122inline int fasttime_cmp(struct fasttime_t *t0, struct fasttime_t *t1)
1da177e4 123{
d8e5219f
JN		 124 /* Compare jiffies. Takes care of wrapping */
125 if (time_before(t0->tv_jiff, t1->tv_jiff))
126 return -1;
127 else if (time_after(t0->tv_jiff, t1->tv_jiff))
128 return 1;
129
130 /* Compare us */
131 if (t0->tv_usec < t1->tv_usec)
132 return -1;
133 else if (t0->tv_usec > t1->tv_usec)
134 return 1;
135 return 0;
1da177e4
LT		 136}
137
2f1f53bd 138inline void start_timer1(unsigned long delay_us)
1da177e4
LT		 139{
140 int freq_index = 0; /* This is the lowest resolution */
141 unsigned long upper_limit = MAX_DELAY_US;
142
143 unsigned long div;
144 /* Start/Restart the timer to the new shorter value */
145 /* t = 1/freq = 1/19200 = 53us
146 * T=div*t, div = T/t = delay_us*freq/1000000
147 */
148#if 1 /* Adaptive timer settings */
149 while (delay_us < upper_limit && freq_index < MAX_USABLE_TIMER_FREQ)
150 {
151 freq_index++;
152 upper_limit >>= 1; /* Divide by 2 using shift */
153 }
154 if (freq_index > 0)
155 {
156 freq_index--;
157 }
158#else
159 freq_index = 6;
160#endif
161 div = delay_us * timer_freq_100[freq_index]/10000;
162 if (div < 2)
163 {
164 /* Maybe increase timer freq? */
165 div = 2;
166 }
167 if (div > 255)
168 {
169 div = 0; /* This means 256, the max the timer takes */
170 /* If a longer timeout than the timer can handle is used,
171 * then we must restart it when it goes off.
172 */
173 }
174
175 timer_div_settings[fast_timers_started % NUM_TIMER_STATS] = div;
176 timer_freq_settings[fast_timers_started % NUM_TIMER_STATS] = freq_index;
177 timer_delay_settings[fast_timers_started % NUM_TIMER_STATS] = delay_us;
178
d8e5219f 179 D1(printk(KERN_DEBUG "start_timer1 : %d us freq: %i div: %i\n",
1da177e4
LT		 180 delay_us, freq_index, div));
181 /* Clear timer1 irq */
182 *R_IRQ_MASK0_CLR = IO_STATE(R_IRQ_MASK0_CLR, timer1, clr);
183
184 /* Set timer values */
185 *R_TIMER_CTRL = r_timer_ctrl_shadow =
186 (r_timer_ctrl_shadow &
187 ~IO_MASK(R_TIMER_CTRL, timerdiv1) &
188 ~IO_MASK(R_TIMER_CTRL, tm1) &
189 ~IO_MASK(R_TIMER_CTRL, clksel1)) |
190 IO_FIELD(R_TIMER_CTRL, timerdiv1, div) |
191 IO_STATE(R_TIMER_CTRL, tm1, stop_ld) |
192 IO_FIELD(R_TIMER_CTRL, clksel1, freq_index ); /* 6=c19k2Hz */
193
194 /* Ack interrupt */
195 *R_TIMER_CTRL = r_timer_ctrl_shadow |
196 IO_STATE(R_TIMER_CTRL, i1, clr);
197
198 /* Start timer */
199 *R_TIMER_CTRL = r_timer_ctrl_shadow =
200 (r_timer_ctrl_shadow & ~IO_MASK(R_TIMER_CTRL, tm1)) |
201 IO_STATE(R_TIMER_CTRL, tm1, run);
202
203 /* Enable timer1 irq */
204 *R_IRQ_MASK0_SET = IO_STATE(R_IRQ_MASK0_SET, timer1, set);
205 fast_timers_started++;
206 fast_timer_running = 1;
207}
208
209/* In version 1.4 this function takes 27 - 50 us */
210void start_one_shot_timer(struct fast_timer *t,
211 fast_timer_function_type *function,
212 unsigned long data,
213 unsigned long delay_us,
214 const char *name)
215{
216 unsigned long flags;
217 struct fast_timer *tmp;
218
219 D1(printk("sft %s %d us\n", name, delay_us));
220
7e920426 221 local_irq_save(flags);
1da177e4
LT		 222
223 do_gettimeofday_fast(&t->tv_set);
224 tmp = fast_timer_list;
225
4200c35d
JN		 226#ifdef FAST_TIMER_SANITY_CHECKS
227 /* Check so this is not in the list already... */
228 while (tmp != NULL) {
229 if (tmp == t) {
230 printk(KERN_WARNING "timer name: %s data: "
231 "0x%08lX already in list!\n", name, data);
232 sanity_failed++;
233 goto done;
234 } else
235 tmp = tmp->next;
236 }
237 tmp = fast_timer_list;
238#endif
1da177e4
LT		 239
240 t->delay_us = delay_us;
241 t->function = function;
242 t->data = data;
243 t->name = name;
244
245 t->tv_expires.tv_usec = t->tv_set.tv_usec + delay_us % 1000000;
d8e5219f 246 t->tv_expires.tv_jiff = t->tv_set.tv_jiff + delay_us / 1000000 / HZ;
1da177e4
LT		 247 if (t->tv_expires.tv_usec > 1000000)
248 {
249 t->tv_expires.tv_usec -= 1000000;
d8e5219f 250 t->tv_expires.tv_jiff += HZ;
1da177e4
LT		 251 }
252#ifdef FAST_TIMER_LOG
253 timer_added_log[fast_timers_added % NUM_TIMER_STATS] = *t;
254#endif
255 fast_timers_added++;
256
257 /* Check if this should timeout before anything else */
2f1f53bd 258 if (tmp == NULL || fasttime_cmp(&t->tv_expires, &tmp->tv_expires) < 0)
1da177e4
LT		 259 {
260 /* Put first in list and modify the timer value */
261 t->prev = NULL;
262 t->next = fast_timer_list;
263 if (fast_timer_list)
264 {
265 fast_timer_list->prev = t;
266 }
267 fast_timer_list = t;
268#ifdef FAST_TIMER_LOG
269 timer_started_log[fast_timers_started % NUM_TIMER_STATS] = *t;
270#endif
271 start_timer1(delay_us);
272 } else {
273 /* Put in correct place in list */
2f1f53bd
JN		 274 while (tmp->next && fasttime_cmp(&t->tv_expires,
275 &tmp->next->tv_expires) > 0)
1da177e4
LT		 276 {
277 tmp = tmp->next;
278 }
279 /* Insert t after tmp */
280 t->prev = tmp;
281 t->next = tmp->next;
282 if (tmp->next)
283 {
284 tmp->next->prev = t;
285 }
286 tmp->next = t;
287 }
288
289 D2(printk("start_one_shot_timer: %d us done\n", delay_us));
290
d8e5219f 291done:
7e920426 292 local_irq_restore(flags);
1da177e4
LT		 293} /* start_one_shot_timer */
294
295static inline int fast_timer_pending (const struct fast_timer * t)
296{
297 return (t->next != NULL) || (t->prev != NULL) || (t == fast_timer_list);
298}
299
300static inline int detach_fast_timer (struct fast_timer *t)
301{
302 struct fast_timer *next, *prev;
303 if (!fast_timer_pending(t))
304 return 0;
305 next = t->next;
306 prev = t->prev;
307 if (next)
308 next->prev = prev;
309 if (prev)
310 prev->next = next;
311 else
312 fast_timer_list = next;
313 fast_timers_deleted++;
314 return 1;
315}
316
317int del_fast_timer(struct fast_timer * t)
318{
319 unsigned long flags;
320 int ret;
321
7e920426 322 local_irq_save(flags);
1da177e4
LT		 323 ret = detach_fast_timer(t);
324 t->next = t->prev = NULL;
7e920426 325 local_irq_restore(flags);
1da177e4
LT		 326 return ret;
327} /* del_fast_timer */
328
329
330/* Interrupt routines or functions called in interrupt context */
331
332/* Timer 1 interrupt handler */
333
334static irqreturn_t
d8e5219f 335timer1_handler(int irq, void *dev_id)
1da177e4
LT		 336{
337 struct fast_timer *t;
338 unsigned long flags;
339
d8e5219f
JN		 340 /* We keep interrupts disabled not only when we modify the
341 * fast timer list, but any time we hold a reference to a
342 * timer in the list, since del_fast_timer may be called
343 * from (another) interrupt context. Thus, the only time
344 * when interrupts are enabled is when calling the timer
345 * callback function.
346 */
7e920426 347 local_irq_save(flags);
1da177e4
LT		 348
349 /* Clear timer1 irq */
350 *R_IRQ_MASK0_CLR = IO_STATE(R_IRQ_MASK0_CLR, timer1, clr);
351
352 /* First stop timer, then ack interrupt */
353 /* Stop timer */
354 *R_TIMER_CTRL = r_timer_ctrl_shadow =
355 (r_timer_ctrl_shadow & ~IO_MASK(R_TIMER_CTRL, tm1)) |
356 IO_STATE(R_TIMER_CTRL, tm1, stop_ld);
357
358 /* Ack interrupt */
359 *R_TIMER_CTRL = r_timer_ctrl_shadow | IO_STATE(R_TIMER_CTRL, i1, clr);
360
361 fast_timer_running = 0;
362 fast_timer_ints++;
363
1da177e4
LT		 364 t = fast_timer_list;
365 while (t)
366 {
d8e5219f
JN		 367 struct fasttime_t tv;
368 fast_timer_function_type *f;
369 unsigned long d;
1da177e4
LT		 370
371 /* Has it really expired? */
372 do_gettimeofday_fast(&tv);
d8e5219f
JN		 373 D1(printk(KERN_DEBUG "t: %is %06ius\n",
374 tv.tv_jiff, tv.tv_usec));
1da177e4 375
2f1f53bd 376 if (fasttime_cmp(&t->tv_expires, &tv) <= 0)
1da177e4
LT		 377 {
378 /* Yes it has expired */
379#ifdef FAST_TIMER_LOG
380 timer_expired_log[fast_timers_expired % NUM_TIMER_STATS] = *t;
381#endif
382 fast_timers_expired++;
383
384 /* Remove this timer before call, since it may reuse the timer */
1da177e4
LT		 385 if (t->prev)
386 {
387 t->prev->next = t->next;
388 }
389 else
390 {
391 fast_timer_list = t->next;
392 }
393 if (t->next)
394 {
395 t->next->prev = t->prev;
396 }
397 t->prev = NULL;
398 t->next = NULL;
1da177e4 399
d8e5219f
JN		 400 /* Save function callback data before enabling
401 * interrupts, since the timer may be removed and
402 * we don't know how it was allocated
403 * (e.g. ->function and ->data may become overwritten
404 * after deletion if the timer was stack-allocated).
405 */
406 f = t->function;
407 d = t->data;
408
409 if (f != NULL) {
410 /* Run callback with interrupts enabled. */
411 local_irq_restore(flags);
412 f(d);
413 local_irq_save(flags);
414 } else
1da177e4 415 DEBUG_LOG("!timer1 %i function==NULL!\n", fast_timer_ints);
1da177e4
LT		 416 }
417 else
418 {
419 /* Timer is to early, let's set it again using the normal routines */
420 D1(printk(".\n"));
421 }
422
1da177e4
LT		 423 if ((t = fast_timer_list) != NULL)
424 {
425 /* Start next timer.. */
d8e5219f
JN		 426 long us = 0;
427 struct fasttime_t tv;
1da177e4
LT		 428
429 do_gettimeofday_fast(&tv);
d8e5219f
JN		 430
431 /* time_after_eq takes care of wrapping */
432 if (time_after_eq(t->tv_expires.tv_jiff, tv.tv_jiff))
433 us = ((t->tv_expires.tv_jiff - tv.tv_jiff) *
434 1000000 / HZ + t->tv_expires.tv_usec -
435 tv.tv_usec);
436
1da177e4
LT		 437 if (us > 0)
438 {
439 if (!fast_timer_running)
440 {
441#ifdef FAST_TIMER_LOG
442 timer_started_log[fast_timers_started % NUM_TIMER_STATS] = *t;
443#endif
444 start_timer1(us);
445 }
1da177e4
LT		 446 break;
447 }
448 else
449 {
450 /* Timer already expired, let's handle it better late than never.
451 * The normal loop handles it
452 */
453 D1(printk("e! %d\n", us));
454 }
455 }
1da177e4
LT		 456 }
457
d8e5219f
JN		 458 local_irq_restore(flags);
459
1da177e4
LT		 460 if (!t)
461 {
462 D1(printk("t1 stop!\n"));
463 }
464
465 return IRQ_HANDLED;
466}
467
468static void wake_up_func(unsigned long data)
469{
d77eab8c 470 wait_queue_head_t *sleep_wait_p = (wait_queue_head_t *)data;
1da177e4
LT		 471 wake_up(sleep_wait_p);
472}
473
474
475/* Useful API */
476
477void schedule_usleep(unsigned long us)
478{
479 struct fast_timer t;
1da177e4
LT		 480 wait_queue_head_t sleep_wait;
481 init_waitqueue_head(&sleep_wait);
1da177e4
LT		 482
483 D1(printk("schedule_usleep(%d)\n", us));
1da177e4
LT		 484 start_one_shot_timer(&t, wake_up_func, (unsigned long)&sleep_wait, us,
485 "usleep");
d8e5219f
JN		 486 /* Uninterruptible sleep on the fast timer. (The condition is somewhat
487 * redundant since the timer is what wakes us up.) */
488 wait_event(sleep_wait, !fast_timer_pending(&t));
489
1da177e4 490 D1(printk("done schedule_usleep(%d)\n", us));
1da177e4
LT		 491}
492
493#ifdef CONFIG_PROC_FS
494static int proc_fasttimer_read(char *buf, char **start, off_t offset, int len
495 ,int *eof, void *data_unused);
496static struct proc_dir_entry *fasttimer_proc_entry;
497#endif /* CONFIG_PROC_FS */
498
499#ifdef CONFIG_PROC_FS
500
501/* This value is very much based on testing */
502#define BIG_BUF_SIZE (500 + NUM_TIMER_STATS * 300)
503
504static int proc_fasttimer_read(char *buf, char **start, off_t offset, int len
505 ,int *eof, void *data_unused)
506{
507 unsigned long flags;
508 int i = 0;
509 int num_to_show;
d8e5219f 510 struct fasttime_t tv;
1da177e4
LT		 511 struct fast_timer *t, *nextt;
512 static char *bigbuf = NULL;
513 static unsigned long used;
514
515 if (!bigbuf && !(bigbuf = vmalloc(BIG_BUF_SIZE)))
516 {
517 used = 0;
d8e5219f
JN		 518 if (buf)
519 buf[0] = '\0';
1da177e4
LT		 520 return 0;
521 }
522
523 if (!offset || !used)
524 {
525 do_gettimeofday_fast(&tv);
526
527 used = 0;
528 used += sprintf(bigbuf + used, "Fast timers added: %i\n",
529 fast_timers_added);
530 used += sprintf(bigbuf + used, "Fast timers started: %i\n",
531 fast_timers_started);
532 used += sprintf(bigbuf + used, "Fast timer interrupts: %i\n",
533 fast_timer_ints);
534 used += sprintf(bigbuf + used, "Fast timers expired: %i\n",
535 fast_timers_expired);
536 used += sprintf(bigbuf + used, "Fast timers deleted: %i\n",
537 fast_timers_deleted);
538 used += sprintf(bigbuf + used, "Fast timer running: %s\n",
539 fast_timer_running ? "yes" : "no");
540 used += sprintf(bigbuf + used, "Current time: %lu.%06lu\n",
d8e5219f 541 (unsigned long)tv.tv_jiff,
1da177e4
LT		 542 (unsigned long)tv.tv_usec);
543#ifdef FAST_TIMER_SANITY_CHECKS
544 used += sprintf(bigbuf + used, "Sanity failed: %i\n",
545 sanity_failed);
546#endif
547 used += sprintf(bigbuf + used, "\n");
548
549#ifdef DEBUG_LOG_INCLUDED
550 {
551 int end_i = debug_log_cnt;
552 i = 0;
553
554 if (debug_log_cnt_wrapped)
555 {
556 i = debug_log_cnt;
557 }
558
559 while ((i != end_i || (debug_log_cnt_wrapped && !used)) &&
560 used+100 < BIG_BUF_SIZE)
561 {
562 used += sprintf(bigbuf + used, debug_log_string[i],
563 debug_log_value[i]);
564 i = (i+1) % DEBUG_LOG_MAX;
565 }
566 }
567 used += sprintf(bigbuf + used, "\n");
568#endif
569
570 num_to_show = (fast_timers_started < NUM_TIMER_STATS ? fast_timers_started:
571 NUM_TIMER_STATS);
572 used += sprintf(bigbuf + used, "Timers started: %i\n", fast_timers_started);
573 for (i = 0; i < num_to_show && (used+100 < BIG_BUF_SIZE) ; i++)
574 {
575 int cur = (fast_timers_started - i - 1) % NUM_TIMER_STATS;
576
577#if 1 //ndef FAST_TIMER_LOG
578 used += sprintf(bigbuf + used, "div: %i freq: %i delay: %i"
579 "\n",
580 timer_div_settings[cur],
581 timer_freq_settings[cur],
582 timer_delay_settings[cur]
583 );
584#endif
585#ifdef FAST_TIMER_LOG
586 t = &timer_started_log[cur];
587 used += sprintf(bigbuf + used, "%-14s s: %6lu.%06lu e: %6lu.%06lu "
588 "d: %6li us data: 0x%08lX"
589 "\n",
590 t->name,
d8e5219f 591 (unsigned long)t->tv_set.tv_jiff,
1da177e4 592 (unsigned long)t->tv_set.tv_usec,
d8e5219f 593 (unsigned long)t->tv_expires.tv_jiff,
1da177e4
LT		 594 (unsigned long)t->tv_expires.tv_usec,
595 t->delay_us,
596 t->data
597 );
598#endif
599 }
600 used += sprintf(bigbuf + used, "\n");
601
602#ifdef FAST_TIMER_LOG
603 num_to_show = (fast_timers_added < NUM_TIMER_STATS ? fast_timers_added:
604 NUM_TIMER_STATS);
605 used += sprintf(bigbuf + used, "Timers added: %i\n", fast_timers_added);
606 for (i = 0; i < num_to_show && (used+100 < BIG_BUF_SIZE); i++)
607 {
608 t = &timer_added_log[(fast_timers_added - i - 1) % NUM_TIMER_STATS];
609 used += sprintf(bigbuf + used, "%-14s s: %6lu.%06lu e: %6lu.%06lu "
610 "d: %6li us data: 0x%08lX"
611 "\n",
612 t->name,
d8e5219f 613 (unsigned long)t->tv_set.tv_jiff,
1da177e4 614 (unsigned long)t->tv_set.tv_usec,
d8e5219f 615 (unsigned long)t->tv_expires.tv_jiff,
1da177e4
LT		 616 (unsigned long)t->tv_expires.tv_usec,
617 t->delay_us,
618 t->data
619 );
620 }
621 used += sprintf(bigbuf + used, "\n");
622
623 num_to_show = (fast_timers_expired < NUM_TIMER_STATS ? fast_timers_expired:
624 NUM_TIMER_STATS);
625 used += sprintf(bigbuf + used, "Timers expired: %i\n", fast_timers_expired);
626 for (i = 0; i < num_to_show && (used+100 < BIG_BUF_SIZE); i++)
627 {
628 t = &timer_expired_log[(fast_timers_expired - i - 1) % NUM_TIMER_STATS];
629 used += sprintf(bigbuf + used, "%-14s s: %6lu.%06lu e: %6lu.%06lu "
630 "d: %6li us data: 0x%08lX"
631 "\n",
632 t->name,
d8e5219f 633 (unsigned long)t->tv_set.tv_jiff,
1da177e4 634 (unsigned long)t->tv_set.tv_usec,
d8e5219f 635 (unsigned long)t->tv_expires.tv_jiff,
1da177e4
LT		 636 (unsigned long)t->tv_expires.tv_usec,
637 t->delay_us,
638 t->data
639 );
640 }
641 used += sprintf(bigbuf + used, "\n");
642#endif
643
644 used += sprintf(bigbuf + used, "Active timers:\n");
7e920426 645 local_irq_save(flags);
1da177e4
LT		 646 t = fast_timer_list;
647 while (t != NULL && (used+100 < BIG_BUF_SIZE))
648 {
649 nextt = t->next;
7e920426 650 local_irq_restore(flags);
1da177e4
LT		 651 used += sprintf(bigbuf + used, "%-14s s: %6lu.%06lu e: %6lu.%06lu "
652 "d: %6li us data: 0x%08lX"
653/* " func: 0x%08lX" */
654 "\n",
655 t->name,
d8e5219f 656 (unsigned long)t->tv_set.tv_jiff,
1da177e4 657 (unsigned long)t->tv_set.tv_usec,
d8e5219f 658 (unsigned long)t->tv_expires.tv_jiff,
1da177e4
LT		 659 (unsigned long)t->tv_expires.tv_usec,
660 t->delay_us,
661 t->data
662/* , t->function */
663 );
d8e5219f 664 local_irq_save(flags);
1da177e4
LT		 665 if (t->next != nextt)
666 {
667 printk(KERN_WARNING "timer removed!\n");
668 }
669 t = nextt;
670 }
7e920426 671 local_irq_restore(flags);
1da177e4
LT		 672 }
673
674 if (used - offset < len)
675 {
676 len = used - offset;
677 }
678
679 memcpy(buf, bigbuf + offset, len);
680 *start = buf;
681 *eof = 1;
682
683 return len;
684}
685#endif /* PROC_FS */
686
687#ifdef FAST_TIMER_TEST
688static volatile unsigned long i = 0;
689static volatile int num_test_timeout = 0;
690static struct fast_timer tr[10];
691static int exp_num[10];
692
d8e5219f 693static struct fasttime_t tv_exp[100];
1da177e4
LT		 694
695static void test_timeout(unsigned long data)
696{
697 do_gettimeofday_fast(&tv_exp[data]);
698 exp_num[data] = num_test_timeout;
699
700 num_test_timeout++;
701}
702
703static void test_timeout1(unsigned long data)
704{
705 do_gettimeofday_fast(&tv_exp[data]);
706 exp_num[data] = num_test_timeout;
707 if (data < 7)
708 {
709 start_one_shot_timer(&tr[i], test_timeout1, i, 1000, "timeout1");
710 i++;
711 }
712 num_test_timeout++;
713}
714
715DP(
716static char buf0[2000];
717static char buf1[2000];
718static char buf2[2000];
719static char buf3[2000];
720static char buf4[2000];
721);
722
723static char buf5[6000];
724static int j_u[1000];
725
726static void fast_timer_test(void)
727{
728 int prev_num;
729 int j;
730
d8e5219f 731 struct fasttime_t tv, tv0, tv1, tv2;
1da177e4
LT		 732
733 printk("fast_timer_test() start\n");
734 do_gettimeofday_fast(&tv);
735
736 for (j = 0; j < 1000; j++)
737 {
738 j_u[j] = GET_JIFFIES_USEC();
739 }
740 for (j = 0; j < 100; j++)
741 {
742 do_gettimeofday_fast(&tv_exp[j]);
743 }
d8e5219f
JN		 744 printk(KERN_DEBUG "fast_timer_test() %is %06i\n",
745 tv.tv_jiff, tv.tv_usec);
1da177e4
LT		 746
747 for (j = 0; j < 1000; j++)
748 {
749 printk("%i %i %i %i %i\n",j_u[j], j_u[j+1], j_u[j+2], j_u[j+3], j_u[j+4]);
750 j += 4;
751 }
752 for (j = 0; j < 100; j++)
753 {
d8e5219f
JN		 754 printk(KERN_DEBUG "%i.%i %i.%i %i.%i %i.%i %i.%i\n",
755 tv_exp[j].tv_jiff, tv_exp[j].tv_usec,
756 tv_exp[j+1].tv_jiff, tv_exp[j+1].tv_usec,
757 tv_exp[j+2].tv_jiff, tv_exp[j+2].tv_usec,
758 tv_exp[j+3].tv_jiff, tv_exp[j+3].tv_usec,
759 tv_exp[j+4].tv_jiff, tv_exp[j+4].tv_usec);
1da177e4
LT		 760 j += 4;
761 }
762 do_gettimeofday_fast(&tv0);
763 start_one_shot_timer(&tr[i], test_timeout, i, 50000, "test0");
764 DP(proc_fasttimer_read(buf0, NULL, 0, 0, 0));
765 i++;
766 start_one_shot_timer(&tr[i], test_timeout, i, 70000, "test1");
767 DP(proc_fasttimer_read(buf1, NULL, 0, 0, 0));
768 i++;
769 start_one_shot_timer(&tr[i], test_timeout, i, 40000, "test2");
770 DP(proc_fasttimer_read(buf2, NULL, 0, 0, 0));
771 i++;
772 start_one_shot_timer(&tr[i], test_timeout, i, 60000, "test3");
773 DP(proc_fasttimer_read(buf3, NULL, 0, 0, 0));
774 i++;
775 start_one_shot_timer(&tr[i], test_timeout1, i, 55000, "test4xx");
776 DP(proc_fasttimer_read(buf4, NULL, 0, 0, 0));
777 i++;
778 do_gettimeofday_fast(&tv1);
779
780 proc_fasttimer_read(buf5, NULL, 0, 0, 0);
781
782 prev_num = num_test_timeout;
783 while (num_test_timeout < i)
784 {
785 if (num_test_timeout != prev_num)
786 {
787 prev_num = num_test_timeout;
788 }
789 }
790 do_gettimeofday_fast(&tv2);
d8e5219f
JN		 791 printk(KERN_DEBUG "Timers started %is %06i\n",
792 tv0.tv_jiff, tv0.tv_usec);
793 printk(KERN_DEBUG "Timers started at %is %06i\n",
794 tv1.tv_jiff, tv1.tv_usec);
795 printk(KERN_DEBUG "Timers done %is %06i\n",
796 tv2.tv_jiff, tv2.tv_usec);
1da177e4
LT		 797 DP(printk("buf0:\n");
798 printk(buf0);
799 printk("buf1:\n");
800 printk(buf1);
801 printk("buf2:\n");
802 printk(buf2);
803 printk("buf3:\n");
804 printk(buf3);
805 printk("buf4:\n");
806 printk(buf4);
807 );
808 printk("buf5:\n");
809 printk(buf5);
810
811 printk("timers set:\n");
812 for(j = 0; j<i; j++)
813 {
814 struct fast_timer *t = &tr[j];
815 printk("%-10s set: %6is %06ius exp: %6is %06ius "
816 "data: 0x%08X func: 0x%08X\n",
817 t->name,
d8e5219f 818 t->tv_set.tv_jiff,
1da177e4 819 t->tv_set.tv_usec,
d8e5219f 820 t->tv_expires.tv_jiff,
1da177e4
LT		 821 t->tv_expires.tv_usec,
822 t->data,
823 t->function
824 );
825
826 printk(" del: %6ius did exp: %6is %06ius as #%i error: %6li\n",
827 t->delay_us,
d8e5219f 828 tv_exp[j].tv_jiff,
1da177e4
LT		 829 tv_exp[j].tv_usec,
830 exp_num[j],
d8e5219f
JN		 831 (tv_exp[j].tv_jiff - t->tv_expires.tv_jiff) *
832 1000000 + tv_exp[j].tv_usec -
833 t->tv_expires.tv_usec);
1da177e4
LT		 834 }
835 proc_fasttimer_read(buf5, NULL, 0, 0, 0);
836 printk("buf5 after all done:\n");
837 printk(buf5);
838 printk("fast_timer_test() done\n");
839}
840#endif
841
842
d8e5219f 843int fast_timer_init(void)
1da177e4
LT		 844{
845 /* For some reason, request_irq() hangs when called froom time_init() */
846 if (!fast_timer_is_init)
847 {
848#if 0 && defined(FAST_TIMER_TEST)
849 int i;
850#endif
851
852 printk(KERN_INFO "fast_timer_init()\n");
853
854#if 0 && defined(FAST_TIMER_TEST)
855 for (i = 0; i <= TIMER0_DIV; i++)
856 {
857 /* We must be careful not to get overflow... */
858 printk("%3i %6u\n", i, timer0_value_us[i]);
859 }
860#endif
861#ifdef CONFIG_PROC_FS
862 if ((fasttimer_proc_entry = create_proc_entry( "fasttimer", 0, 0 )))
863 fasttimer_proc_entry->read_proc = proc_fasttimer_read;
864#endif /* PROC_FS */
7e920426 865 if(request_irq(TIMER1_IRQ_NBR, timer1_handler, 0,
1da177e4
LT		 866 "fast timer int", NULL))
867 {
868 printk("err: timer1 irq\n");
869 }
870 fast_timer_is_init = 1;
871#ifdef FAST_TIMER_TEST
872 printk("do test\n");
873 fast_timer_test();
874#endif
875 }
d8e5219f 876 return 0;
1da177e4 877}
d8e5219f 878__initcall(fast_timer_init);
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