1 /* $Id: fasttimer.c,v 1.1.1.1 2005/04/29 01:40:43 echo 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 1.1.1.1 2005/04/29 01:40:43 echo
9 * Project for BCMDT_3.0
11 * Revision 1.6 2004/05/14 10:18:39 starvik
12 * Export fast_timer_list
14 * Revision 1.5 2004/05/14 07:58:01 starvik
15 * Merge of changes from 2.4
17 * Revision 1.4 2003/07/04 08:27:41 starvik
18 * Merge of Linux 2.5.74
20 * Revision 1.3 2002/12/12 08:26:32 starvik
21 * Don't use C-comments inside CVS comments
23 * Revision 1.2 2002/12/11 15:42:02 starvik
24 * Extracted v10 (ETRAX 100LX) specific stuff from arch/cris/kernel/
26 * Revision 1.1 2002/11/18 07:58:06 starvik
27 * Fast timers (from Linux 2.4)
29 * Revision 1.5 2002/10/15 06:21:39 starvik
30 * Added call to init_waitqueue_head
32 * Revision 1.4 2002/05/28 17:47:59 johana
33 * Added del_fast_timer()
35 * Revision 1.3 2002/05/28 16:16:07 johana
36 * Handle empty fast_timer_list
38 * Revision 1.2 2002/05/27 15:38:42 johana
39 * Made it compile without warnings on Linux 2.4.
40 * (includes, wait_queue, PROC_FS and snprintf)
42 * Revision 1.1 2002/05/27 15:32:25 johana
43 * arch/etrax100/kernel/fasttimer.c v1.8 from the elinux tree.
45 * Revision 1.8 2001/11/27 13:50:40 pkj
46 * Disable interrupts while stopping the timer and while modifying the
47 * list of active timers in timer1_handler() as it may be interrupted
48 * by other interrupts (e.g., the serial interrupt) which may add fast
51 * Revision 1.7 2001/11/22 11:50:32 pkj
52 * * Only store information about the last 16 timers.
53 * * proc_fasttimer_read() now uses an allocated buffer, since it
54 * requires more space than just a page even for only writing the
55 * last 16 timers. The buffer is only allocated on request, so
56 * unless /proc/fasttimer is read, it is never allocated.
57 * * Renamed fast_timer_started to fast_timers_started to match
58 * fast_timers_added and fast_timers_expired.
61 * Revision 1.6 2000/12/13 14:02:08 johana
62 * Removed volatile for fast_timer_list
64 * Revision 1.5 2000/12/13 13:55:35 johana
65 * Added DEBUG_LOG, added som cli() and cleanup
67 * Revision 1.4 2000/12/05 13:48:50 johana
68 * Added range check when writing proc file, modified timer int handling
70 * Revision 1.3 2000/11/23 10:10:20 johana
71 * More debug/logging possibilities.
72 * Moved GET_JIFFIES_USEC() to timex.h and time.c
74 * Revision 1.2 2000/11/01 13:41:04 johana
75 * Clean up and bugfixes.
76 * Created new do_gettimeofday_fast() that gets a timeval struct
77 * with time based on jiffies and *R_TIMER0_DATA, uses a table
78 * for fast conversion of timer value to microseconds.
79 * (Much faster the standard do_gettimeofday() and we don't really
80 * wan't to use the true time - we wan't the "uptime" so timers don't screw up
81 * when we change the time.
82 * TODO: Add efficient support for continuous timers as well.
84 * Revision 1.1 2000/10/26 15:49:16 johana
85 * Added fasttimer, highresolution timers.
87 * Copyright (C) 2000,2001 2002 Axis Communications AB, Lund, Sweden
90 #include <linux/errno.h>
91 #include <linux/sched.h>
92 #include <linux/kernel.h>
93 #include <linux/param.h>
94 #include <linux/string.h>
96 #include <linux/vmalloc.h>
97 #include <linux/interrupt.h>
98 #include <linux/time.h>
99 #include <linux/delay.h>
101 #include <asm/segment.h>
104 #include <asm/delay.h>
107 #include <linux/config.h>
108 #include <linux/version.h>
110 #include <asm/arch/svinto.h>
111 #include <asm/fasttimer.h>
112 #include <linux/proc_fs.h>
115 #define DEBUG_LOG_INCLUDED
116 #define FAST_TIMER_LOG
117 //#define FAST_TIMER_TEST
119 #define FAST_TIMER_SANITY_CHECKS
121 #ifdef FAST_TIMER_SANITY_CHECKS
122 #define SANITYCHECK(x) x
123 static int sanity_failed = 0;
125 #define SANITYCHECK(x)
132 #define __INLINE__ inline
134 static int fast_timer_running = 0;
135 static int fast_timers_added = 0;
136 static int fast_timers_started = 0;
137 static int fast_timers_expired = 0;
138 static int fast_timers_deleted = 0;
139 static int fast_timer_is_init = 0;
140 static int fast_timer_ints = 0;
142 struct fast_timer *fast_timer_list = NULL;
144 #ifdef DEBUG_LOG_INCLUDED
145 #define DEBUG_LOG_MAX 128
146 static const char * debug_log_string[DEBUG_LOG_MAX];
147 static unsigned long debug_log_value[DEBUG_LOG_MAX];
148 static int debug_log_cnt = 0;
149 static int debug_log_cnt_wrapped = 0;
151 #define DEBUG_LOG(string, value) \
153 unsigned long log_flags; \
154 save_flags(log_flags); \
156 debug_log_string[debug_log_cnt] = (string); \
157 debug_log_value[debug_log_cnt] = (unsigned long)(value); \
158 if (++debug_log_cnt >= DEBUG_LOG_MAX) \
160 debug_log_cnt = debug_log_cnt % DEBUG_LOG_MAX; \
161 debug_log_cnt_wrapped = 1; \
163 restore_flags(log_flags); \
166 #define DEBUG_LOG(string, value)
170 /* The frequencies for index = clkselx number in R_TIMER_CTRL */
171 #define NUM_TIMER_FREQ 15
172 #define MAX_USABLE_TIMER_FREQ 7
173 #define MAX_DELAY_US 853333L
174 const unsigned long timer_freq_100[NUM_TIMER_FREQ] =
176 3, /* 0 3333 - 853333 us */
177 6, /* 1 1666 - 426666 us */
178 12, /* 2 833 - 213333 us */
179 24, /* 3 416 - 106666 us */
180 48, /* 4 208 - 53333 us */
181 96, /* 5 104 - 26666 us */
182 192, /* 6 52 - 13333 us */
183 384, /* 7 26 - 6666 us */
193 #define NUM_TIMER_STATS 16
194 #ifdef FAST_TIMER_LOG
195 struct fast_timer timer_added_log[NUM_TIMER_STATS];
196 struct fast_timer timer_started_log[NUM_TIMER_STATS];
197 struct fast_timer timer_expired_log[NUM_TIMER_STATS];
200 int timer_div_settings[NUM_TIMER_STATS];
201 int timer_freq_settings[NUM_TIMER_STATS];
202 int timer_delay_settings[NUM_TIMER_STATS];
204 /* Not true gettimeofday, only checks the jiffies (uptime) + useconds */
205 void __INLINE__ do_gettimeofday_fast(struct timeval *tv)
207 unsigned long sec = jiffies;
208 unsigned long usec = GET_JIFFIES_USEC();
210 usec += (sec % HZ) * (1000000 / HZ);
222 int __INLINE__ timeval_cmp(struct timeval *t0, struct timeval *t1)
224 if (t0->tv_sec < t1->tv_sec)
228 else if (t0->tv_sec > t1->tv_sec)
232 if (t0->tv_usec < t1->tv_usec)
236 else if (t0->tv_usec > t1->tv_usec)
243 void __INLINE__ start_timer1(unsigned long delay_us)
245 int freq_index = 0; /* This is the lowest resolution */
246 unsigned long upper_limit = MAX_DELAY_US;
249 /* Start/Restart the timer to the new shorter value */
250 /* t = 1/freq = 1/19200 = 53us
251 * T=div*t, div = T/t = delay_us*freq/1000000
253 #if 1 /* Adaptive timer settings */
254 while (delay_us < upper_limit && freq_index < MAX_USABLE_TIMER_FREQ)
257 upper_limit >>= 1; /* Divide by 2 using shift */
266 div = delay_us * timer_freq_100[freq_index]/10000;
269 /* Maybe increase timer freq? */
274 div = 0; /* This means 256, the max the timer takes */
275 /* If a longer timeout than the timer can handle is used,
276 * then we must restart it when it goes off.
280 timer_div_settings[fast_timers_started % NUM_TIMER_STATS] = div;
281 timer_freq_settings[fast_timers_started % NUM_TIMER_STATS] = freq_index;
282 timer_delay_settings[fast_timers_started % NUM_TIMER_STATS] = delay_us;
284 D1(printk("start_timer1 : %d us freq: %i div: %i\n",
285 delay_us, freq_index, div));
286 /* Clear timer1 irq */
287 *R_IRQ_MASK0_CLR = IO_STATE(R_IRQ_MASK0_CLR, timer1, clr);
289 /* Set timer values */
290 *R_TIMER_CTRL = r_timer_ctrl_shadow =
291 (r_timer_ctrl_shadow &
292 ~IO_MASK(R_TIMER_CTRL, timerdiv1) &
293 ~IO_MASK(R_TIMER_CTRL, tm1) &
294 ~IO_MASK(R_TIMER_CTRL, clksel1)) |
295 IO_FIELD(R_TIMER_CTRL, timerdiv1, div) |
296 IO_STATE(R_TIMER_CTRL, tm1, stop_ld) |
297 IO_FIELD(R_TIMER_CTRL, clksel1, freq_index ); /* 6=c19k2Hz */
300 *R_TIMER_CTRL = r_timer_ctrl_shadow |
301 IO_STATE(R_TIMER_CTRL, i1, clr);
304 *R_TIMER_CTRL = r_timer_ctrl_shadow =
305 (r_timer_ctrl_shadow & ~IO_MASK(R_TIMER_CTRL, tm1)) |
306 IO_STATE(R_TIMER_CTRL, tm1, run);
308 /* Enable timer1 irq */
309 *R_IRQ_MASK0_SET = IO_STATE(R_IRQ_MASK0_SET, timer1, set);
310 fast_timers_started++;
311 fast_timer_running = 1;
314 /* In version 1.4 this function takes 27 - 50 us */
315 void start_one_shot_timer(struct fast_timer *t,
316 fast_timer_function_type *function,
318 unsigned long delay_us,
322 struct fast_timer *tmp;
324 D1(printk("sft %s %d us\n", name, delay_us));
329 do_gettimeofday_fast(&t->tv_set);
330 tmp = fast_timer_list;
332 SANITYCHECK({ /* Check so this is not in the list already... */
338 "timer name: %s data: 0x%08lX already in list!\n", name, data);
347 tmp = fast_timer_list;
350 t->delay_us = delay_us;
351 t->function = function;
355 t->tv_expires.tv_usec = t->tv_set.tv_usec + delay_us % 1000000;
356 t->tv_expires.tv_sec = t->tv_set.tv_sec + delay_us / 1000000;
357 if (t->tv_expires.tv_usec > 1000000)
359 t->tv_expires.tv_usec -= 1000000;
360 t->tv_expires.tv_sec++;
362 #ifdef FAST_TIMER_LOG
363 timer_added_log[fast_timers_added % NUM_TIMER_STATS] = *t;
367 /* Check if this should timeout before anything else */
368 if (tmp == NULL || timeval_cmp(&t->tv_expires, &tmp->tv_expires) < 0)
370 /* Put first in list and modify the timer value */
372 t->next = fast_timer_list;
375 fast_timer_list->prev = t;
378 #ifdef FAST_TIMER_LOG
379 timer_started_log[fast_timers_started % NUM_TIMER_STATS] = *t;
381 start_timer1(delay_us);
383 /* Put in correct place in list */
385 timeval_cmp(&t->tv_expires, &tmp->next->tv_expires) > 0)
389 /* Insert t after tmp */
399 D2(printk("start_one_shot_timer: %d us done\n", delay_us));
401 restore_flags(flags);
402 } /* start_one_shot_timer */
404 static inline int fast_timer_pending (const struct fast_timer * t)
406 return (t->next != NULL) || (t->prev != NULL) || (t == fast_timer_list);
409 static inline int detach_fast_timer (struct fast_timer *t)
411 struct fast_timer *next, *prev;
412 if (!fast_timer_pending(t))
421 fast_timer_list = next;
422 fast_timers_deleted++;
426 int del_fast_timer(struct fast_timer * t)
433 ret = detach_fast_timer(t);
434 t->next = t->prev = NULL;
435 restore_flags(flags);
437 } /* del_fast_timer */
440 /* Interrupt routines or functions called in interrupt context */
442 /* Timer 1 interrupt handler */
445 timer1_handler(int irq, void *dev_id, struct pt_regs *regs)
447 struct fast_timer *t;
453 /* Clear timer1 irq */
454 *R_IRQ_MASK0_CLR = IO_STATE(R_IRQ_MASK0_CLR, timer1, clr);
456 /* First stop timer, then ack interrupt */
458 *R_TIMER_CTRL = r_timer_ctrl_shadow =
459 (r_timer_ctrl_shadow & ~IO_MASK(R_TIMER_CTRL, tm1)) |
460 IO_STATE(R_TIMER_CTRL, tm1, stop_ld);
463 *R_TIMER_CTRL = r_timer_ctrl_shadow | IO_STATE(R_TIMER_CTRL, i1, clr);
465 fast_timer_running = 0;
468 restore_flags(flags);
475 /* Has it really expired? */
476 do_gettimeofday_fast(&tv);
477 D1(printk("t: %is %06ius\n", tv.tv_sec, tv.tv_usec));
479 if (timeval_cmp(&t->tv_expires, &tv) <= 0)
481 /* Yes it has expired */
482 #ifdef FAST_TIMER_LOG
483 timer_expired_log[fast_timers_expired % NUM_TIMER_STATS] = *t;
485 fast_timers_expired++;
487 /* Remove this timer before call, since it may reuse the timer */
492 t->prev->next = t->next;
496 fast_timer_list = t->next;
500 t->next->prev = t->prev;
504 restore_flags(flags);
506 if (t->function != NULL)
508 t->function(t->data);
512 DEBUG_LOG("!timer1 %i function==NULL!\n", fast_timer_ints);
517 /* Timer is to early, let's set it again using the normal routines */
523 if ((t = fast_timer_list) != NULL)
525 /* Start next timer.. */
529 do_gettimeofday_fast(&tv);
530 us = ((t->tv_expires.tv_sec - tv.tv_sec) * 1000000 +
531 t->tv_expires.tv_usec - tv.tv_usec);
534 if (!fast_timer_running)
536 #ifdef FAST_TIMER_LOG
537 timer_started_log[fast_timers_started % NUM_TIMER_STATS] = *t;
541 restore_flags(flags);
546 /* Timer already expired, let's handle it better late than never.
547 * The normal loop handles it
549 D1(printk("e! %d\n", us));
552 restore_flags(flags);
557 D1(printk("t1 stop!\n"));
563 static void wake_up_func(unsigned long data)
565 #ifdef DECLARE_WAITQUEUE
566 wait_queue_head_t *sleep_wait_p = (wait_queue_head_t*)data;
568 struct wait_queue **sleep_wait_p = (struct wait_queue **)data;
570 wake_up(sleep_wait_p);
576 void schedule_usleep(unsigned long us)
579 #ifdef DECLARE_WAITQUEUE
580 wait_queue_head_t sleep_wait;
581 init_waitqueue_head(&sleep_wait);
583 DECLARE_WAITQUEUE(wait, current);
585 struct wait_queue *sleep_wait = NULL;
586 struct wait_queue wait = { current, NULL };
589 D1(printk("schedule_usleep(%d)\n", us));
590 add_wait_queue(&sleep_wait, &wait);
591 set_current_state(TASK_INTERRUPTIBLE);
592 start_one_shot_timer(&t, wake_up_func, (unsigned long)&sleep_wait, us,
595 set_current_state(TASK_RUNNING);
596 remove_wait_queue(&sleep_wait, &wait);
597 D1(printk("done schedule_usleep(%d)\n", us));
598 #ifdef DECLARE_WAITQUEUE
603 #ifdef CONFIG_PROC_FS
604 static int proc_fasttimer_read(char *buf, char **start, off_t offset, int len
605 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0)
606 ,int *eof, void *data_unused
611 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0)
612 static struct proc_dir_entry *fasttimer_proc_entry;
614 static struct proc_dir_entry fasttimer_proc_entry =
617 S_IFREG | S_IRUGO, 1, 0, 0,
618 0, NULL /* ops -- default to array */,
619 &proc_fasttimer_read /* get_info */,
622 #endif /* CONFIG_PROC_FS */
624 #ifdef CONFIG_PROC_FS
626 /* This value is very much based on testing */
627 #define BIG_BUF_SIZE (500 + NUM_TIMER_STATS * 300)
629 static int proc_fasttimer_read(char *buf, char **start, off_t offset, int len
630 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0)
631 ,int *eof, void *data_unused
641 struct fast_timer *t, *nextt;
642 static char *bigbuf = NULL;
643 static unsigned long used;
645 if (!bigbuf && !(bigbuf = vmalloc(BIG_BUF_SIZE)))
652 if (!offset || !used)
654 do_gettimeofday_fast(&tv);
657 used += sprintf(bigbuf + used, "Fast timers added: %i\n",
659 used += sprintf(bigbuf + used, "Fast timers started: %i\n",
660 fast_timers_started);
661 used += sprintf(bigbuf + used, "Fast timer interrupts: %i\n",
663 used += sprintf(bigbuf + used, "Fast timers expired: %i\n",
664 fast_timers_expired);
665 used += sprintf(bigbuf + used, "Fast timers deleted: %i\n",
666 fast_timers_deleted);
667 used += sprintf(bigbuf + used, "Fast timer running: %s\n",
668 fast_timer_running ? "yes" : "no");
669 used += sprintf(bigbuf + used, "Current time: %lu.%06lu\n",
670 (unsigned long)tv.tv_sec,
671 (unsigned long)tv.tv_usec);
672 #ifdef FAST_TIMER_SANITY_CHECKS
673 used += sprintf(bigbuf + used, "Sanity failed: %i\n",
676 used += sprintf(bigbuf + used, "\n");
678 #ifdef DEBUG_LOG_INCLUDED
680 int end_i = debug_log_cnt;
683 if (debug_log_cnt_wrapped)
688 while ((i != end_i || (debug_log_cnt_wrapped && !used)) &&
689 used+100 < BIG_BUF_SIZE)
691 used += sprintf(bigbuf + used, debug_log_string[i],
693 i = (i+1) % DEBUG_LOG_MAX;
696 used += sprintf(bigbuf + used, "\n");
699 num_to_show = (fast_timers_started < NUM_TIMER_STATS ? fast_timers_started:
701 used += sprintf(bigbuf + used, "Timers started: %i\n", fast_timers_started);
702 for (i = 0; i < num_to_show && (used+100 < BIG_BUF_SIZE) ; i++)
704 int cur = (fast_timers_started - i - 1) % NUM_TIMER_STATS;
706 #if 1 //ndef FAST_TIMER_LOG
707 used += sprintf(bigbuf + used, "div: %i freq: %i delay: %i"
709 timer_div_settings[cur],
710 timer_freq_settings[cur],
711 timer_delay_settings[cur]
714 #ifdef FAST_TIMER_LOG
715 t = &timer_started_log[cur];
716 used += sprintf(bigbuf + used, "%-14s s: %6lu.%06lu e: %6lu.%06lu "
717 "d: %6li us data: 0x%08lX"
720 (unsigned long)t->tv_set.tv_sec,
721 (unsigned long)t->tv_set.tv_usec,
722 (unsigned long)t->tv_expires.tv_sec,
723 (unsigned long)t->tv_expires.tv_usec,
729 used += sprintf(bigbuf + used, "\n");
731 #ifdef FAST_TIMER_LOG
732 num_to_show = (fast_timers_added < NUM_TIMER_STATS ? fast_timers_added:
734 used += sprintf(bigbuf + used, "Timers added: %i\n", fast_timers_added);
735 for (i = 0; i < num_to_show && (used+100 < BIG_BUF_SIZE); i++)
737 t = &timer_added_log[(fast_timers_added - i - 1) % NUM_TIMER_STATS];
738 used += sprintf(bigbuf + used, "%-14s s: %6lu.%06lu e: %6lu.%06lu "
739 "d: %6li us data: 0x%08lX"
742 (unsigned long)t->tv_set.tv_sec,
743 (unsigned long)t->tv_set.tv_usec,
744 (unsigned long)t->tv_expires.tv_sec,
745 (unsigned long)t->tv_expires.tv_usec,
750 used += sprintf(bigbuf + used, "\n");
752 num_to_show = (fast_timers_expired < NUM_TIMER_STATS ? fast_timers_expired:
754 used += sprintf(bigbuf + used, "Timers expired: %i\n", fast_timers_expired);
755 for (i = 0; i < num_to_show && (used+100 < BIG_BUF_SIZE); i++)
757 t = &timer_expired_log[(fast_timers_expired - i - 1) % NUM_TIMER_STATS];
758 used += sprintf(bigbuf + used, "%-14s s: %6lu.%06lu e: %6lu.%06lu "
759 "d: %6li us data: 0x%08lX"
762 (unsigned long)t->tv_set.tv_sec,
763 (unsigned long)t->tv_set.tv_usec,
764 (unsigned long)t->tv_expires.tv_sec,
765 (unsigned long)t->tv_expires.tv_usec,
770 used += sprintf(bigbuf + used, "\n");
773 used += sprintf(bigbuf + used, "Active timers:\n");
777 while (t != NULL && (used+100 < BIG_BUF_SIZE))
780 restore_flags(flags);
781 used += sprintf(bigbuf + used, "%-14s s: %6lu.%06lu e: %6lu.%06lu "
782 "d: %6li us data: 0x%08lX"
783 /* " func: 0x%08lX" */
786 (unsigned long)t->tv_set.tv_sec,
787 (unsigned long)t->tv_set.tv_usec,
788 (unsigned long)t->tv_expires.tv_sec,
789 (unsigned long)t->tv_expires.tv_usec,
795 if (t->next != nextt)
797 printk(KERN_WARNING "timer removed!\n");
801 restore_flags(flags);
804 if (used - offset < len)
809 memcpy(buf, bigbuf + offset, len);
811 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0)
819 #ifdef FAST_TIMER_TEST
820 static volatile unsigned long i = 0;
821 static volatile int num_test_timeout = 0;
822 static struct fast_timer tr[10];
823 static int exp_num[10];
825 static struct timeval tv_exp[100];
827 static void test_timeout(unsigned long data)
829 do_gettimeofday_fast(&tv_exp[data]);
830 exp_num[data] = num_test_timeout;
835 static void test_timeout1(unsigned long data)
837 do_gettimeofday_fast(&tv_exp[data]);
838 exp_num[data] = num_test_timeout;
841 start_one_shot_timer(&tr[i], test_timeout1, i, 1000, "timeout1");
848 static char buf0[2000];
849 static char buf1[2000];
850 static char buf2[2000];
851 static char buf3[2000];
852 static char buf4[2000];
855 static char buf5[6000];
856 static int j_u[1000];
858 static void fast_timer_test(void)
863 struct timeval tv, tv0, tv1, tv2;
865 printk("fast_timer_test() start\n");
866 do_gettimeofday_fast(&tv);
868 for (j = 0; j < 1000; j++)
870 j_u[j] = GET_JIFFIES_USEC();
872 for (j = 0; j < 100; j++)
874 do_gettimeofday_fast(&tv_exp[j]);
876 printk("fast_timer_test() %is %06i\n", tv.tv_sec, tv.tv_usec);
878 for (j = 0; j < 1000; j++)
880 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]);
883 for (j = 0; j < 100; j++)
885 printk("%i.%i %i.%i %i.%i %i.%i %i.%i\n",
886 tv_exp[j].tv_sec,tv_exp[j].tv_usec,
887 tv_exp[j+1].tv_sec,tv_exp[j+1].tv_usec,
888 tv_exp[j+2].tv_sec,tv_exp[j+2].tv_usec,
889 tv_exp[j+3].tv_sec,tv_exp[j+3].tv_usec,
890 tv_exp[j+4].tv_sec,tv_exp[j+4].tv_usec);
893 do_gettimeofday_fast(&tv0);
894 start_one_shot_timer(&tr[i], test_timeout, i, 50000, "test0");
895 DP(proc_fasttimer_read(buf0, NULL, 0, 0, 0));
897 start_one_shot_timer(&tr[i], test_timeout, i, 70000, "test1");
898 DP(proc_fasttimer_read(buf1, NULL, 0, 0, 0));
900 start_one_shot_timer(&tr[i], test_timeout, i, 40000, "test2");
901 DP(proc_fasttimer_read(buf2, NULL, 0, 0, 0));
903 start_one_shot_timer(&tr[i], test_timeout, i, 60000, "test3");
904 DP(proc_fasttimer_read(buf3, NULL, 0, 0, 0));
906 start_one_shot_timer(&tr[i], test_timeout1, i, 55000, "test4xx");
907 DP(proc_fasttimer_read(buf4, NULL, 0, 0, 0));
909 do_gettimeofday_fast(&tv1);
911 proc_fasttimer_read(buf5, NULL, 0, 0, 0);
913 prev_num = num_test_timeout;
914 while (num_test_timeout < i)
916 if (num_test_timeout != prev_num)
918 prev_num = num_test_timeout;
921 do_gettimeofday_fast(&tv2);
922 printk("Timers started %is %06i\n", tv0.tv_sec, tv0.tv_usec);
923 printk("Timers started at %is %06i\n", tv1.tv_sec, tv1.tv_usec);
924 printk("Timers done %is %06i\n", tv2.tv_sec, tv2.tv_usec);
925 DP(printk("buf0:\n");
939 printk("timers set:\n");
942 struct fast_timer *t = &tr[j];
943 printk("%-10s set: %6is %06ius exp: %6is %06ius "
944 "data: 0x%08X func: 0x%08X\n",
948 t->tv_expires.tv_sec,
949 t->tv_expires.tv_usec,
954 printk(" del: %6ius did exp: %6is %06ius as #%i error: %6li\n",
959 (tv_exp[j].tv_sec - t->tv_expires.tv_sec)*1000000 + tv_exp[j].tv_usec - t->tv_expires.tv_usec);
961 proc_fasttimer_read(buf5, NULL, 0, 0, 0);
962 printk("buf5 after all done:\n");
964 printk("fast_timer_test() done\n");
969 void fast_timer_init(void)
971 /* For some reason, request_irq() hangs when called froom time_init() */
972 if (!fast_timer_is_init)
974 #if 0 && defined(FAST_TIMER_TEST)
978 printk(KERN_INFO "fast_timer_init()\n");
980 #if 0 && defined(FAST_TIMER_TEST)
981 for (i = 0; i <= TIMER0_DIV; i++)
983 /* We must be careful not to get overflow... */
984 printk("%3i %6u\n", i, timer0_value_us[i]);
987 #ifdef CONFIG_PROC_FS
988 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0)
989 if ((fasttimer_proc_entry = create_proc_entry( "fasttimer", 0, 0 )))
990 fasttimer_proc_entry->read_proc = proc_fasttimer_read;
992 proc_register_dynamic(&proc_root, &fasttimer_proc_entry);
995 if(request_irq(TIMER1_IRQ_NBR, timer1_handler, SA_SHIRQ,
996 "fast timer int", NULL))
998 printk("err: timer1 irq\n");
1000 fast_timer_is_init = 1;
1001 #ifdef FAST_TIMER_TEST
1002 printk("do test\n");