1 /* $Id: fasttimer.c,v 1.9 2005/03/04 08:16:16 starvik Exp $
2 * linux/arch/cris/kernel/fasttimer.c
4 * Fast timers for ETRAX100/ETRAX100LX
5 * This may be useful in other OS than Linux so use 2 space indentation...
7 * $Log: fasttimer.c,v $
8 * Revision 1.9 2005/03/04 08:16:16 starvik
9 * Merge of Linux 2.6.11.
11 * Revision 1.8 2005/01/05 06:09:29 starvik
12 * cli()/sti() will be obsolete in 2.6.11.
14 * Revision 1.7 2005/01/03 13:35:46 starvik
15 * Removed obsolete stuff.
16 * Mark fast timer IRQ as not shared.
18 * Revision 1.6 2004/05/14 10:18:39 starvik
19 * Export fast_timer_list
21 * Revision 1.5 2004/05/14 07:58:01 starvik
22 * Merge of changes from 2.4
24 * Revision 1.4 2003/07/04 08:27:41 starvik
25 * Merge of Linux 2.5.74
27 * Revision 1.3 2002/12/12 08:26:32 starvik
28 * Don't use C-comments inside CVS comments
30 * Revision 1.2 2002/12/11 15:42:02 starvik
31 * Extracted v10 (ETRAX 100LX) specific stuff from arch/cris/kernel/
33 * Revision 1.1 2002/11/18 07:58:06 starvik
34 * Fast timers (from Linux 2.4)
36 * Revision 1.5 2002/10/15 06:21:39 starvik
37 * Added call to init_waitqueue_head
39 * Revision 1.4 2002/05/28 17:47:59 johana
40 * Added del_fast_timer()
42 * Revision 1.3 2002/05/28 16:16:07 johana
43 * Handle empty fast_timer_list
45 * Revision 1.2 2002/05/27 15:38:42 johana
46 * Made it compile without warnings on Linux 2.4.
47 * (includes, wait_queue, PROC_FS and snprintf)
49 * Revision 1.1 2002/05/27 15:32:25 johana
50 * arch/etrax100/kernel/fasttimer.c v1.8 from the elinux tree.
52 * Revision 1.8 2001/11/27 13:50:40 pkj
53 * Disable interrupts while stopping the timer and while modifying the
54 * list of active timers in timer1_handler() as it may be interrupted
55 * by other interrupts (e.g., the serial interrupt) which may add fast
58 * Revision 1.7 2001/11/22 11:50:32 pkj
59 * * Only store information about the last 16 timers.
60 * * proc_fasttimer_read() now uses an allocated buffer, since it
61 * requires more space than just a page even for only writing the
62 * last 16 timers. The buffer is only allocated on request, so
63 * unless /proc/fasttimer is read, it is never allocated.
64 * * Renamed fast_timer_started to fast_timers_started to match
65 * fast_timers_added and fast_timers_expired.
68 * Revision 1.6 2000/12/13 14:02:08 johana
69 * Removed volatile for fast_timer_list
71 * Revision 1.5 2000/12/13 13:55:35 johana
72 * Added DEBUG_LOG, added som cli() and cleanup
74 * Revision 1.4 2000/12/05 13:48:50 johana
75 * Added range check when writing proc file, modified timer int handling
77 * Revision 1.3 2000/11/23 10:10:20 johana
78 * More debug/logging possibilities.
79 * Moved GET_JIFFIES_USEC() to timex.h and time.c
81 * Revision 1.2 2000/11/01 13:41:04 johana
82 * Clean up and bugfixes.
83 * Created new do_gettimeofday_fast() that gets a timeval struct
84 * with time based on jiffies and *R_TIMER0_DATA, uses a table
85 * for fast conversion of timer value to microseconds.
86 * (Much faster the standard do_gettimeofday() and we don't really
87 * wan't to use the true time - we wan't the "uptime" so timers don't screw up
88 * when we change the time.
89 * TODO: Add efficient support for continuous timers as well.
91 * Revision 1.1 2000/10/26 15:49:16 johana
92 * Added fasttimer, highresolution timers.
94 * Copyright (C) 2000,2001 2002 Axis Communications AB, Lund, Sweden
97 #include <linux/errno.h>
98 #include <linux/sched.h>
99 #include <linux/kernel.h>
100 #include <linux/param.h>
101 #include <linux/string.h>
102 #include <linux/mm.h>
103 #include <linux/vmalloc.h>
104 #include <linux/interrupt.h>
105 #include <linux/time.h>
106 #include <linux/delay.h>
108 #include <asm/segment.h>
111 #include <asm/delay.h>
114 #include <linux/config.h>
115 #include <linux/version.h>
117 #include <asm/arch/svinto.h>
118 #include <asm/fasttimer.h>
119 #include <linux/proc_fs.h>
122 #define DEBUG_LOG_INCLUDED
123 #define FAST_TIMER_LOG
124 //#define FAST_TIMER_TEST
126 #define FAST_TIMER_SANITY_CHECKS
128 #ifdef FAST_TIMER_SANITY_CHECKS
129 #define SANITYCHECK(x) x
130 static int sanity_failed = 0;
132 #define SANITYCHECK(x)
139 #define __INLINE__ inline
141 static int fast_timer_running = 0;
142 static int fast_timers_added = 0;
143 static int fast_timers_started = 0;
144 static int fast_timers_expired = 0;
145 static int fast_timers_deleted = 0;
146 static int fast_timer_is_init = 0;
147 static int fast_timer_ints = 0;
149 struct fast_timer *fast_timer_list = NULL;
151 #ifdef DEBUG_LOG_INCLUDED
152 #define DEBUG_LOG_MAX 128
153 static const char * debug_log_string[DEBUG_LOG_MAX];
154 static unsigned long debug_log_value[DEBUG_LOG_MAX];
155 static int debug_log_cnt = 0;
156 static int debug_log_cnt_wrapped = 0;
158 #define DEBUG_LOG(string, value) \
160 unsigned long log_flags; \
161 local_irq_save(log_flags); \
162 debug_log_string[debug_log_cnt] = (string); \
163 debug_log_value[debug_log_cnt] = (unsigned long)(value); \
164 if (++debug_log_cnt >= DEBUG_LOG_MAX) \
166 debug_log_cnt = debug_log_cnt % DEBUG_LOG_MAX; \
167 debug_log_cnt_wrapped = 1; \
169 local_irq_restore(log_flags); \
172 #define DEBUG_LOG(string, value)
176 /* The frequencies for index = clkselx number in R_TIMER_CTRL */
177 #define NUM_TIMER_FREQ 15
178 #define MAX_USABLE_TIMER_FREQ 7
179 #define MAX_DELAY_US 853333L
180 const unsigned long timer_freq_100[NUM_TIMER_FREQ] =
182 3, /* 0 3333 - 853333 us */
183 6, /* 1 1666 - 426666 us */
184 12, /* 2 833 - 213333 us */
185 24, /* 3 416 - 106666 us */
186 48, /* 4 208 - 53333 us */
187 96, /* 5 104 - 26666 us */
188 192, /* 6 52 - 13333 us */
189 384, /* 7 26 - 6666 us */
199 #define NUM_TIMER_STATS 16
200 #ifdef FAST_TIMER_LOG
201 struct fast_timer timer_added_log[NUM_TIMER_STATS];
202 struct fast_timer timer_started_log[NUM_TIMER_STATS];
203 struct fast_timer timer_expired_log[NUM_TIMER_STATS];
206 int timer_div_settings[NUM_TIMER_STATS];
207 int timer_freq_settings[NUM_TIMER_STATS];
208 int timer_delay_settings[NUM_TIMER_STATS];
210 /* Not true gettimeofday, only checks the jiffies (uptime) + useconds */
211 void __INLINE__ do_gettimeofday_fast(struct timeval *tv)
213 unsigned long sec = jiffies;
214 unsigned long usec = GET_JIFFIES_USEC();
216 usec += (sec % HZ) * (1000000 / HZ);
228 int __INLINE__ timeval_cmp(struct timeval *t0, struct timeval *t1)
230 if (t0->tv_sec < t1->tv_sec)
234 else if (t0->tv_sec > t1->tv_sec)
238 if (t0->tv_usec < t1->tv_usec)
242 else if (t0->tv_usec > t1->tv_usec)
249 void __INLINE__ start_timer1(unsigned long delay_us)
251 int freq_index = 0; /* This is the lowest resolution */
252 unsigned long upper_limit = MAX_DELAY_US;
255 /* Start/Restart the timer to the new shorter value */
256 /* t = 1/freq = 1/19200 = 53us
257 * T=div*t, div = T/t = delay_us*freq/1000000
259 #if 1 /* Adaptive timer settings */
260 while (delay_us < upper_limit && freq_index < MAX_USABLE_TIMER_FREQ)
263 upper_limit >>= 1; /* Divide by 2 using shift */
272 div = delay_us * timer_freq_100[freq_index]/10000;
275 /* Maybe increase timer freq? */
280 div = 0; /* This means 256, the max the timer takes */
281 /* If a longer timeout than the timer can handle is used,
282 * then we must restart it when it goes off.
286 timer_div_settings[fast_timers_started % NUM_TIMER_STATS] = div;
287 timer_freq_settings[fast_timers_started % NUM_TIMER_STATS] = freq_index;
288 timer_delay_settings[fast_timers_started % NUM_TIMER_STATS] = delay_us;
290 D1(printk("start_timer1 : %d us freq: %i div: %i\n",
291 delay_us, freq_index, div));
292 /* Clear timer1 irq */
293 *R_IRQ_MASK0_CLR = IO_STATE(R_IRQ_MASK0_CLR, timer1, clr);
295 /* Set timer values */
296 *R_TIMER_CTRL = r_timer_ctrl_shadow =
297 (r_timer_ctrl_shadow &
298 ~IO_MASK(R_TIMER_CTRL, timerdiv1) &
299 ~IO_MASK(R_TIMER_CTRL, tm1) &
300 ~IO_MASK(R_TIMER_CTRL, clksel1)) |
301 IO_FIELD(R_TIMER_CTRL, timerdiv1, div) |
302 IO_STATE(R_TIMER_CTRL, tm1, stop_ld) |
303 IO_FIELD(R_TIMER_CTRL, clksel1, freq_index ); /* 6=c19k2Hz */
306 *R_TIMER_CTRL = r_timer_ctrl_shadow |
307 IO_STATE(R_TIMER_CTRL, i1, clr);
310 *R_TIMER_CTRL = r_timer_ctrl_shadow =
311 (r_timer_ctrl_shadow & ~IO_MASK(R_TIMER_CTRL, tm1)) |
312 IO_STATE(R_TIMER_CTRL, tm1, run);
314 /* Enable timer1 irq */
315 *R_IRQ_MASK0_SET = IO_STATE(R_IRQ_MASK0_SET, timer1, set);
316 fast_timers_started++;
317 fast_timer_running = 1;
320 /* In version 1.4 this function takes 27 - 50 us */
321 void start_one_shot_timer(struct fast_timer *t,
322 fast_timer_function_type *function,
324 unsigned long delay_us,
328 struct fast_timer *tmp;
330 D1(printk("sft %s %d us\n", name, delay_us));
332 local_irq_save(flags);
334 do_gettimeofday_fast(&t->tv_set);
335 tmp = fast_timer_list;
337 SANITYCHECK({ /* Check so this is not in the list already... */
343 "timer name: %s data: 0x%08lX already in list!\n", name, data);
352 tmp = fast_timer_list;
355 t->delay_us = delay_us;
356 t->function = function;
360 t->tv_expires.tv_usec = t->tv_set.tv_usec + delay_us % 1000000;
361 t->tv_expires.tv_sec = t->tv_set.tv_sec + delay_us / 1000000;
362 if (t->tv_expires.tv_usec > 1000000)
364 t->tv_expires.tv_usec -= 1000000;
365 t->tv_expires.tv_sec++;
367 #ifdef FAST_TIMER_LOG
368 timer_added_log[fast_timers_added % NUM_TIMER_STATS] = *t;
372 /* Check if this should timeout before anything else */
373 if (tmp == NULL || timeval_cmp(&t->tv_expires, &tmp->tv_expires) < 0)
375 /* Put first in list and modify the timer value */
377 t->next = fast_timer_list;
380 fast_timer_list->prev = t;
383 #ifdef FAST_TIMER_LOG
384 timer_started_log[fast_timers_started % NUM_TIMER_STATS] = *t;
386 start_timer1(delay_us);
388 /* Put in correct place in list */
390 timeval_cmp(&t->tv_expires, &tmp->next->tv_expires) > 0)
394 /* Insert t after tmp */
404 D2(printk("start_one_shot_timer: %d us done\n", delay_us));
406 local_irq_restore(flags);
407 } /* start_one_shot_timer */
409 static inline int fast_timer_pending (const struct fast_timer * t)
411 return (t->next != NULL) || (t->prev != NULL) || (t == fast_timer_list);
414 static inline int detach_fast_timer (struct fast_timer *t)
416 struct fast_timer *next, *prev;
417 if (!fast_timer_pending(t))
426 fast_timer_list = next;
427 fast_timers_deleted++;
431 int del_fast_timer(struct fast_timer * t)
436 local_irq_save(flags);
437 ret = detach_fast_timer(t);
438 t->next = t->prev = NULL;
439 local_irq_restore(flags);
441 } /* del_fast_timer */
444 /* Interrupt routines or functions called in interrupt context */
446 /* Timer 1 interrupt handler */
449 timer1_handler(int irq, void *dev_id, struct pt_regs *regs)
451 struct fast_timer *t;
454 local_irq_save(flags);
456 /* Clear timer1 irq */
457 *R_IRQ_MASK0_CLR = IO_STATE(R_IRQ_MASK0_CLR, timer1, clr);
459 /* First stop timer, then ack interrupt */
461 *R_TIMER_CTRL = r_timer_ctrl_shadow =
462 (r_timer_ctrl_shadow & ~IO_MASK(R_TIMER_CTRL, tm1)) |
463 IO_STATE(R_TIMER_CTRL, tm1, stop_ld);
466 *R_TIMER_CTRL = r_timer_ctrl_shadow | IO_STATE(R_TIMER_CTRL, i1, clr);
468 fast_timer_running = 0;
471 local_irq_restore(flags);
478 /* Has it really expired? */
479 do_gettimeofday_fast(&tv);
480 D1(printk("t: %is %06ius\n", tv.tv_sec, tv.tv_usec));
482 if (timeval_cmp(&t->tv_expires, &tv) <= 0)
484 /* Yes it has expired */
485 #ifdef FAST_TIMER_LOG
486 timer_expired_log[fast_timers_expired % NUM_TIMER_STATS] = *t;
488 fast_timers_expired++;
490 /* Remove this timer before call, since it may reuse the timer */
491 local_irq_save(flags);
494 t->prev->next = t->next;
498 fast_timer_list = t->next;
502 t->next->prev = t->prev;
506 local_irq_restore(flags);
508 if (t->function != NULL)
510 t->function(t->data);
514 DEBUG_LOG("!timer1 %i function==NULL!\n", fast_timer_ints);
519 /* Timer is to early, let's set it again using the normal routines */
523 local_irq_save(flags);
524 if ((t = fast_timer_list) != NULL)
526 /* Start next timer.. */
530 do_gettimeofday_fast(&tv);
531 us = ((t->tv_expires.tv_sec - tv.tv_sec) * 1000000 +
532 t->tv_expires.tv_usec - tv.tv_usec);
535 if (!fast_timer_running)
537 #ifdef FAST_TIMER_LOG
538 timer_started_log[fast_timers_started % NUM_TIMER_STATS] = *t;
542 local_irq_restore(flags);
547 /* Timer already expired, let's handle it better late than never.
548 * The normal loop handles it
550 D1(printk("e! %d\n", us));
553 local_irq_restore(flags);
558 D1(printk("t1 stop!\n"));
564 static void wake_up_func(unsigned long data)
566 #ifdef DECLARE_WAITQUEUE
567 wait_queue_head_t *sleep_wait_p = (wait_queue_head_t*)data;
569 struct wait_queue **sleep_wait_p = (struct wait_queue **)data;
571 wake_up(sleep_wait_p);
577 void schedule_usleep(unsigned long us)
580 #ifdef DECLARE_WAITQUEUE
581 wait_queue_head_t sleep_wait;
582 init_waitqueue_head(&sleep_wait);
584 DECLARE_WAITQUEUE(wait, current);
586 struct wait_queue *sleep_wait = NULL;
587 struct wait_queue wait = { current, NULL };
590 D1(printk("schedule_usleep(%d)\n", us));
591 add_wait_queue(&sleep_wait, &wait);
592 set_current_state(TASK_INTERRUPTIBLE);
593 start_one_shot_timer(&t, wake_up_func, (unsigned long)&sleep_wait, us,
596 set_current_state(TASK_RUNNING);
597 remove_wait_queue(&sleep_wait, &wait);
598 D1(printk("done schedule_usleep(%d)\n", us));
599 #ifdef DECLARE_WAITQUEUE
604 #ifdef CONFIG_PROC_FS
605 static int proc_fasttimer_read(char *buf, char **start, off_t offset, int len
606 ,int *eof, void *data_unused);
607 static struct proc_dir_entry *fasttimer_proc_entry;
608 #endif /* CONFIG_PROC_FS */
610 #ifdef CONFIG_PROC_FS
612 /* This value is very much based on testing */
613 #define BIG_BUF_SIZE (500 + NUM_TIMER_STATS * 300)
615 static int proc_fasttimer_read(char *buf, char **start, off_t offset, int len
616 ,int *eof, void *data_unused)
622 struct fast_timer *t, *nextt;
623 static char *bigbuf = NULL;
624 static unsigned long used;
626 if (!bigbuf && !(bigbuf = vmalloc(BIG_BUF_SIZE)))
633 if (!offset || !used)
635 do_gettimeofday_fast(&tv);
638 used += sprintf(bigbuf + used, "Fast timers added: %i\n",
640 used += sprintf(bigbuf + used, "Fast timers started: %i\n",
641 fast_timers_started);
642 used += sprintf(bigbuf + used, "Fast timer interrupts: %i\n",
644 used += sprintf(bigbuf + used, "Fast timers expired: %i\n",
645 fast_timers_expired);
646 used += sprintf(bigbuf + used, "Fast timers deleted: %i\n",
647 fast_timers_deleted);
648 used += sprintf(bigbuf + used, "Fast timer running: %s\n",
649 fast_timer_running ? "yes" : "no");
650 used += sprintf(bigbuf + used, "Current time: %lu.%06lu\n",
651 (unsigned long)tv.tv_sec,
652 (unsigned long)tv.tv_usec);
653 #ifdef FAST_TIMER_SANITY_CHECKS
654 used += sprintf(bigbuf + used, "Sanity failed: %i\n",
657 used += sprintf(bigbuf + used, "\n");
659 #ifdef DEBUG_LOG_INCLUDED
661 int end_i = debug_log_cnt;
664 if (debug_log_cnt_wrapped)
669 while ((i != end_i || (debug_log_cnt_wrapped && !used)) &&
670 used+100 < BIG_BUF_SIZE)
672 used += sprintf(bigbuf + used, debug_log_string[i],
674 i = (i+1) % DEBUG_LOG_MAX;
677 used += sprintf(bigbuf + used, "\n");
680 num_to_show = (fast_timers_started < NUM_TIMER_STATS ? fast_timers_started:
682 used += sprintf(bigbuf + used, "Timers started: %i\n", fast_timers_started);
683 for (i = 0; i < num_to_show && (used+100 < BIG_BUF_SIZE) ; i++)
685 int cur = (fast_timers_started - i - 1) % NUM_TIMER_STATS;
687 #if 1 //ndef FAST_TIMER_LOG
688 used += sprintf(bigbuf + used, "div: %i freq: %i delay: %i"
690 timer_div_settings[cur],
691 timer_freq_settings[cur],
692 timer_delay_settings[cur]
695 #ifdef FAST_TIMER_LOG
696 t = &timer_started_log[cur];
697 used += sprintf(bigbuf + used, "%-14s s: %6lu.%06lu e: %6lu.%06lu "
698 "d: %6li us data: 0x%08lX"
701 (unsigned long)t->tv_set.tv_sec,
702 (unsigned long)t->tv_set.tv_usec,
703 (unsigned long)t->tv_expires.tv_sec,
704 (unsigned long)t->tv_expires.tv_usec,
710 used += sprintf(bigbuf + used, "\n");
712 #ifdef FAST_TIMER_LOG
713 num_to_show = (fast_timers_added < NUM_TIMER_STATS ? fast_timers_added:
715 used += sprintf(bigbuf + used, "Timers added: %i\n", fast_timers_added);
716 for (i = 0; i < num_to_show && (used+100 < BIG_BUF_SIZE); i++)
718 t = &timer_added_log[(fast_timers_added - i - 1) % NUM_TIMER_STATS];
719 used += sprintf(bigbuf + used, "%-14s s: %6lu.%06lu e: %6lu.%06lu "
720 "d: %6li us data: 0x%08lX"
723 (unsigned long)t->tv_set.tv_sec,
724 (unsigned long)t->tv_set.tv_usec,
725 (unsigned long)t->tv_expires.tv_sec,
726 (unsigned long)t->tv_expires.tv_usec,
731 used += sprintf(bigbuf + used, "\n");
733 num_to_show = (fast_timers_expired < NUM_TIMER_STATS ? fast_timers_expired:
735 used += sprintf(bigbuf + used, "Timers expired: %i\n", fast_timers_expired);
736 for (i = 0; i < num_to_show && (used+100 < BIG_BUF_SIZE); i++)
738 t = &timer_expired_log[(fast_timers_expired - i - 1) % NUM_TIMER_STATS];
739 used += sprintf(bigbuf + used, "%-14s s: %6lu.%06lu e: %6lu.%06lu "
740 "d: %6li us data: 0x%08lX"
743 (unsigned long)t->tv_set.tv_sec,
744 (unsigned long)t->tv_set.tv_usec,
745 (unsigned long)t->tv_expires.tv_sec,
746 (unsigned long)t->tv_expires.tv_usec,
751 used += sprintf(bigbuf + used, "\n");
754 used += sprintf(bigbuf + used, "Active timers:\n");
755 local_irq_save(flags);
757 while (t != NULL && (used+100 < BIG_BUF_SIZE))
760 local_irq_restore(flags);
761 used += sprintf(bigbuf + used, "%-14s s: %6lu.%06lu e: %6lu.%06lu "
762 "d: %6li us data: 0x%08lX"
763 /* " func: 0x%08lX" */
766 (unsigned long)t->tv_set.tv_sec,
767 (unsigned long)t->tv_set.tv_usec,
768 (unsigned long)t->tv_expires.tv_sec,
769 (unsigned long)t->tv_expires.tv_usec,
775 if (t->next != nextt)
777 printk(KERN_WARNING "timer removed!\n");
781 local_irq_restore(flags);
784 if (used - offset < len)
789 memcpy(buf, bigbuf + offset, len);
797 #ifdef FAST_TIMER_TEST
798 static volatile unsigned long i = 0;
799 static volatile int num_test_timeout = 0;
800 static struct fast_timer tr[10];
801 static int exp_num[10];
803 static struct timeval tv_exp[100];
805 static void test_timeout(unsigned long data)
807 do_gettimeofday_fast(&tv_exp[data]);
808 exp_num[data] = num_test_timeout;
813 static void test_timeout1(unsigned long data)
815 do_gettimeofday_fast(&tv_exp[data]);
816 exp_num[data] = num_test_timeout;
819 start_one_shot_timer(&tr[i], test_timeout1, i, 1000, "timeout1");
826 static char buf0[2000];
827 static char buf1[2000];
828 static char buf2[2000];
829 static char buf3[2000];
830 static char buf4[2000];
833 static char buf5[6000];
834 static int j_u[1000];
836 static void fast_timer_test(void)
841 struct timeval tv, tv0, tv1, tv2;
843 printk("fast_timer_test() start\n");
844 do_gettimeofday_fast(&tv);
846 for (j = 0; j < 1000; j++)
848 j_u[j] = GET_JIFFIES_USEC();
850 for (j = 0; j < 100; j++)
852 do_gettimeofday_fast(&tv_exp[j]);
854 printk("fast_timer_test() %is %06i\n", tv.tv_sec, tv.tv_usec);
856 for (j = 0; j < 1000; j++)
858 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]);
861 for (j = 0; j < 100; j++)
863 printk("%i.%i %i.%i %i.%i %i.%i %i.%i\n",
864 tv_exp[j].tv_sec,tv_exp[j].tv_usec,
865 tv_exp[j+1].tv_sec,tv_exp[j+1].tv_usec,
866 tv_exp[j+2].tv_sec,tv_exp[j+2].tv_usec,
867 tv_exp[j+3].tv_sec,tv_exp[j+3].tv_usec,
868 tv_exp[j+4].tv_sec,tv_exp[j+4].tv_usec);
871 do_gettimeofday_fast(&tv0);
872 start_one_shot_timer(&tr[i], test_timeout, i, 50000, "test0");
873 DP(proc_fasttimer_read(buf0, NULL, 0, 0, 0));
875 start_one_shot_timer(&tr[i], test_timeout, i, 70000, "test1");
876 DP(proc_fasttimer_read(buf1, NULL, 0, 0, 0));
878 start_one_shot_timer(&tr[i], test_timeout, i, 40000, "test2");
879 DP(proc_fasttimer_read(buf2, NULL, 0, 0, 0));
881 start_one_shot_timer(&tr[i], test_timeout, i, 60000, "test3");
882 DP(proc_fasttimer_read(buf3, NULL, 0, 0, 0));
884 start_one_shot_timer(&tr[i], test_timeout1, i, 55000, "test4xx");
885 DP(proc_fasttimer_read(buf4, NULL, 0, 0, 0));
887 do_gettimeofday_fast(&tv1);
889 proc_fasttimer_read(buf5, NULL, 0, 0, 0);
891 prev_num = num_test_timeout;
892 while (num_test_timeout < i)
894 if (num_test_timeout != prev_num)
896 prev_num = num_test_timeout;
899 do_gettimeofday_fast(&tv2);
900 printk("Timers started %is %06i\n", tv0.tv_sec, tv0.tv_usec);
901 printk("Timers started at %is %06i\n", tv1.tv_sec, tv1.tv_usec);
902 printk("Timers done %is %06i\n", tv2.tv_sec, tv2.tv_usec);
903 DP(printk("buf0:\n");
917 printk("timers set:\n");
920 struct fast_timer *t = &tr[j];
921 printk("%-10s set: %6is %06ius exp: %6is %06ius "
922 "data: 0x%08X func: 0x%08X\n",
926 t->tv_expires.tv_sec,
927 t->tv_expires.tv_usec,
932 printk(" del: %6ius did exp: %6is %06ius as #%i error: %6li\n",
937 (tv_exp[j].tv_sec - t->tv_expires.tv_sec)*1000000 + tv_exp[j].tv_usec - t->tv_expires.tv_usec);
939 proc_fasttimer_read(buf5, NULL, 0, 0, 0);
940 printk("buf5 after all done:\n");
942 printk("fast_timer_test() done\n");
947 void fast_timer_init(void)
949 /* For some reason, request_irq() hangs when called froom time_init() */
950 if (!fast_timer_is_init)
952 #if 0 && defined(FAST_TIMER_TEST)
956 printk(KERN_INFO "fast_timer_init()\n");
958 #if 0 && defined(FAST_TIMER_TEST)
959 for (i = 0; i <= TIMER0_DIV; i++)
961 /* We must be careful not to get overflow... */
962 printk("%3i %6u\n", i, timer0_value_us[i]);
965 #ifdef CONFIG_PROC_FS
966 if ((fasttimer_proc_entry = create_proc_entry( "fasttimer", 0, 0 )))
967 fasttimer_proc_entry->read_proc = proc_fasttimer_read;
969 if(request_irq(TIMER1_IRQ_NBR, timer1_handler, 0,
970 "fast timer int", NULL))
972 printk("err: timer1 irq\n");
974 fast_timer_is_init = 1;
975 #ifdef FAST_TIMER_TEST