979 lines
26 KiB
C
979 lines
26 KiB
C
/* $Id: fasttimer.c,v 1.9 2005/03/04 08:16:16 starvik Exp $
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* linux/arch/cris/kernel/fasttimer.c
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*
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* Fast timers for ETRAX100/ETRAX100LX
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* This may be useful in other OS than Linux so use 2 space indentation...
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*
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* $Log: fasttimer.c,v $
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* Revision 1.9 2005/03/04 08:16:16 starvik
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* Merge of Linux 2.6.11.
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*
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* Revision 1.8 2005/01/05 06:09:29 starvik
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* cli()/sti() will be obsolete in 2.6.11.
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*
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* Revision 1.7 2005/01/03 13:35:46 starvik
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* Removed obsolete stuff.
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* Mark fast timer IRQ as not shared.
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*
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* Revision 1.6 2004/05/14 10:18:39 starvik
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* Export fast_timer_list
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*
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* Revision 1.5 2004/05/14 07:58:01 starvik
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* Merge of changes from 2.4
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*
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* Revision 1.4 2003/07/04 08:27:41 starvik
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* Merge of Linux 2.5.74
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*
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* Revision 1.3 2002/12/12 08:26:32 starvik
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* Don't use C-comments inside CVS comments
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*
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* Revision 1.2 2002/12/11 15:42:02 starvik
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* Extracted v10 (ETRAX 100LX) specific stuff from arch/cris/kernel/
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*
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* Revision 1.1 2002/11/18 07:58:06 starvik
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* Fast timers (from Linux 2.4)
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*
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* Revision 1.5 2002/10/15 06:21:39 starvik
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* Added call to init_waitqueue_head
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*
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* Revision 1.4 2002/05/28 17:47:59 johana
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* Added del_fast_timer()
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*
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* Revision 1.3 2002/05/28 16:16:07 johana
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* Handle empty fast_timer_list
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*
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* Revision 1.2 2002/05/27 15:38:42 johana
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* Made it compile without warnings on Linux 2.4.
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* (includes, wait_queue, PROC_FS and snprintf)
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*
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* Revision 1.1 2002/05/27 15:32:25 johana
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* arch/etrax100/kernel/fasttimer.c v1.8 from the elinux tree.
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*
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* Revision 1.8 2001/11/27 13:50:40 pkj
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* Disable interrupts while stopping the timer and while modifying the
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* list of active timers in timer1_handler() as it may be interrupted
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* by other interrupts (e.g., the serial interrupt) which may add fast
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* timers.
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*
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* Revision 1.7 2001/11/22 11:50:32 pkj
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* * Only store information about the last 16 timers.
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* * proc_fasttimer_read() now uses an allocated buffer, since it
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* requires more space than just a page even for only writing the
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* last 16 timers. The buffer is only allocated on request, so
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* unless /proc/fasttimer is read, it is never allocated.
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* * Renamed fast_timer_started to fast_timers_started to match
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* fast_timers_added and fast_timers_expired.
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* * Some clean-up.
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*
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* Revision 1.6 2000/12/13 14:02:08 johana
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* Removed volatile for fast_timer_list
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*
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* Revision 1.5 2000/12/13 13:55:35 johana
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* Added DEBUG_LOG, added som cli() and cleanup
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*
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* Revision 1.4 2000/12/05 13:48:50 johana
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* Added range check when writing proc file, modified timer int handling
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*
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* Revision 1.3 2000/11/23 10:10:20 johana
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* More debug/logging possibilities.
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* Moved GET_JIFFIES_USEC() to timex.h and time.c
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*
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* Revision 1.2 2000/11/01 13:41:04 johana
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* Clean up and bugfixes.
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* Created new do_gettimeofday_fast() that gets a timeval struct
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* with time based on jiffies and *R_TIMER0_DATA, uses a table
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* for fast conversion of timer value to microseconds.
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* (Much faster the standard do_gettimeofday() and we don't really
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* want to use the true time - we want the "uptime" so timers don't screw up
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* when we change the time.
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* TODO: Add efficient support for continuous timers as well.
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*
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* Revision 1.1 2000/10/26 15:49:16 johana
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* Added fasttimer, highresolution timers.
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*
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* Copyright (C) 2000,2001 2002 Axis Communications AB, Lund, Sweden
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*/
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#include <linux/errno.h>
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#include <linux/sched.h>
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#include <linux/kernel.h>
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#include <linux/param.h>
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#include <linux/string.h>
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#include <linux/mm.h>
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#include <linux/vmalloc.h>
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#include <linux/interrupt.h>
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#include <linux/time.h>
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#include <linux/delay.h>
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#include <asm/segment.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <asm/delay.h>
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#include <asm/rtc.h>
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#include <asm/arch/svinto.h>
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#include <asm/fasttimer.h>
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#include <linux/proc_fs.h>
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#define DEBUG_LOG_INCLUDED
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#define FAST_TIMER_LOG
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//#define FAST_TIMER_TEST
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#define FAST_TIMER_SANITY_CHECKS
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#ifdef FAST_TIMER_SANITY_CHECKS
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#define SANITYCHECK(x) x
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static int sanity_failed = 0;
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#else
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#define SANITYCHECK(x)
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#endif
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#define D1(x)
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#define D2(x)
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#define DP(x)
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#define __INLINE__ inline
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static int fast_timer_running = 0;
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static int fast_timers_added = 0;
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static int fast_timers_started = 0;
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static int fast_timers_expired = 0;
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static int fast_timers_deleted = 0;
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static int fast_timer_is_init = 0;
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static int fast_timer_ints = 0;
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struct fast_timer *fast_timer_list = NULL;
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#ifdef DEBUG_LOG_INCLUDED
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#define DEBUG_LOG_MAX 128
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static const char * debug_log_string[DEBUG_LOG_MAX];
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static unsigned long debug_log_value[DEBUG_LOG_MAX];
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static int debug_log_cnt = 0;
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static int debug_log_cnt_wrapped = 0;
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#define DEBUG_LOG(string, value) \
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{ \
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unsigned long log_flags; \
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local_irq_save(log_flags); \
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debug_log_string[debug_log_cnt] = (string); \
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debug_log_value[debug_log_cnt] = (unsigned long)(value); \
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if (++debug_log_cnt >= DEBUG_LOG_MAX) \
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{ \
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debug_log_cnt = debug_log_cnt % DEBUG_LOG_MAX; \
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debug_log_cnt_wrapped = 1; \
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} \
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local_irq_restore(log_flags); \
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}
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#else
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#define DEBUG_LOG(string, value)
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#endif
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/* The frequencies for index = clkselx number in R_TIMER_CTRL */
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#define NUM_TIMER_FREQ 15
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#define MAX_USABLE_TIMER_FREQ 7
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#define MAX_DELAY_US 853333L
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const unsigned long timer_freq_100[NUM_TIMER_FREQ] =
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{
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3, /* 0 3333 - 853333 us */
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6, /* 1 1666 - 426666 us */
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12, /* 2 833 - 213333 us */
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24, /* 3 416 - 106666 us */
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48, /* 4 208 - 53333 us */
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96, /* 5 104 - 26666 us */
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192, /* 6 52 - 13333 us */
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384, /* 7 26 - 6666 us */
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576,
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1152,
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2304,
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4608,
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9216,
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18432,
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62500,
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/* 15 = cascade */
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};
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#define NUM_TIMER_STATS 16
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#ifdef FAST_TIMER_LOG
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struct fast_timer timer_added_log[NUM_TIMER_STATS];
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struct fast_timer timer_started_log[NUM_TIMER_STATS];
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struct fast_timer timer_expired_log[NUM_TIMER_STATS];
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#endif
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int timer_div_settings[NUM_TIMER_STATS];
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int timer_freq_settings[NUM_TIMER_STATS];
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int timer_delay_settings[NUM_TIMER_STATS];
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/* Not true gettimeofday, only checks the jiffies (uptime) + useconds */
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void __INLINE__ do_gettimeofday_fast(struct timeval *tv)
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{
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unsigned long sec = jiffies;
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unsigned long usec = GET_JIFFIES_USEC();
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usec += (sec % HZ) * (1000000 / HZ);
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sec = sec / HZ;
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if (usec > 1000000)
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{
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usec -= 1000000;
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sec++;
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}
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tv->tv_sec = sec;
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tv->tv_usec = usec;
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}
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int __INLINE__ timeval_cmp(struct timeval *t0, struct timeval *t1)
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{
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if (t0->tv_sec < t1->tv_sec)
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{
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return -1;
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}
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else if (t0->tv_sec > t1->tv_sec)
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{
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return 1;
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}
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if (t0->tv_usec < t1->tv_usec)
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{
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return -1;
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}
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else if (t0->tv_usec > t1->tv_usec)
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{
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return 1;
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}
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return 0;
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}
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void __INLINE__ start_timer1(unsigned long delay_us)
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{
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int freq_index = 0; /* This is the lowest resolution */
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unsigned long upper_limit = MAX_DELAY_US;
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unsigned long div;
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/* Start/Restart the timer to the new shorter value */
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/* t = 1/freq = 1/19200 = 53us
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* T=div*t, div = T/t = delay_us*freq/1000000
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*/
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#if 1 /* Adaptive timer settings */
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while (delay_us < upper_limit && freq_index < MAX_USABLE_TIMER_FREQ)
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{
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freq_index++;
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upper_limit >>= 1; /* Divide by 2 using shift */
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}
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if (freq_index > 0)
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{
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freq_index--;
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}
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#else
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freq_index = 6;
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#endif
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div = delay_us * timer_freq_100[freq_index]/10000;
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if (div < 2)
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{
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/* Maybe increase timer freq? */
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div = 2;
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}
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if (div > 255)
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{
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div = 0; /* This means 256, the max the timer takes */
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/* If a longer timeout than the timer can handle is used,
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* then we must restart it when it goes off.
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*/
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}
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timer_div_settings[fast_timers_started % NUM_TIMER_STATS] = div;
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timer_freq_settings[fast_timers_started % NUM_TIMER_STATS] = freq_index;
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timer_delay_settings[fast_timers_started % NUM_TIMER_STATS] = delay_us;
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D1(printk("start_timer1 : %d us freq: %i div: %i\n",
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delay_us, freq_index, div));
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/* Clear timer1 irq */
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*R_IRQ_MASK0_CLR = IO_STATE(R_IRQ_MASK0_CLR, timer1, clr);
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/* Set timer values */
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*R_TIMER_CTRL = r_timer_ctrl_shadow =
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(r_timer_ctrl_shadow &
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~IO_MASK(R_TIMER_CTRL, timerdiv1) &
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~IO_MASK(R_TIMER_CTRL, tm1) &
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~IO_MASK(R_TIMER_CTRL, clksel1)) |
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IO_FIELD(R_TIMER_CTRL, timerdiv1, div) |
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IO_STATE(R_TIMER_CTRL, tm1, stop_ld) |
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IO_FIELD(R_TIMER_CTRL, clksel1, freq_index ); /* 6=c19k2Hz */
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/* Ack interrupt */
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*R_TIMER_CTRL = r_timer_ctrl_shadow |
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IO_STATE(R_TIMER_CTRL, i1, clr);
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/* Start timer */
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*R_TIMER_CTRL = r_timer_ctrl_shadow =
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(r_timer_ctrl_shadow & ~IO_MASK(R_TIMER_CTRL, tm1)) |
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IO_STATE(R_TIMER_CTRL, tm1, run);
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/* Enable timer1 irq */
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*R_IRQ_MASK0_SET = IO_STATE(R_IRQ_MASK0_SET, timer1, set);
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fast_timers_started++;
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fast_timer_running = 1;
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}
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/* In version 1.4 this function takes 27 - 50 us */
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void start_one_shot_timer(struct fast_timer *t,
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fast_timer_function_type *function,
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unsigned long data,
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unsigned long delay_us,
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const char *name)
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{
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unsigned long flags;
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struct fast_timer *tmp;
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D1(printk("sft %s %d us\n", name, delay_us));
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local_irq_save(flags);
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do_gettimeofday_fast(&t->tv_set);
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tmp = fast_timer_list;
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SANITYCHECK({ /* Check so this is not in the list already... */
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while (tmp != NULL)
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{
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if (tmp == t)
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{
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printk(KERN_WARNING
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"timer name: %s data: 0x%08lX already in list!\n", name, data);
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sanity_failed++;
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return;
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}
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else
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{
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tmp = tmp->next;
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}
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}
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tmp = fast_timer_list;
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});
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t->delay_us = delay_us;
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t->function = function;
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t->data = data;
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t->name = name;
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t->tv_expires.tv_usec = t->tv_set.tv_usec + delay_us % 1000000;
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t->tv_expires.tv_sec = t->tv_set.tv_sec + delay_us / 1000000;
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if (t->tv_expires.tv_usec > 1000000)
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{
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t->tv_expires.tv_usec -= 1000000;
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t->tv_expires.tv_sec++;
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}
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#ifdef FAST_TIMER_LOG
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timer_added_log[fast_timers_added % NUM_TIMER_STATS] = *t;
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#endif
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fast_timers_added++;
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/* Check if this should timeout before anything else */
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if (tmp == NULL || timeval_cmp(&t->tv_expires, &tmp->tv_expires) < 0)
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{
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/* Put first in list and modify the timer value */
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t->prev = NULL;
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t->next = fast_timer_list;
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if (fast_timer_list)
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{
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fast_timer_list->prev = t;
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}
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fast_timer_list = t;
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#ifdef FAST_TIMER_LOG
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timer_started_log[fast_timers_started % NUM_TIMER_STATS] = *t;
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#endif
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start_timer1(delay_us);
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} else {
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/* Put in correct place in list */
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while (tmp->next &&
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timeval_cmp(&t->tv_expires, &tmp->next->tv_expires) > 0)
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{
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tmp = tmp->next;
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}
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/* Insert t after tmp */
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t->prev = tmp;
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t->next = tmp->next;
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if (tmp->next)
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{
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tmp->next->prev = t;
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}
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tmp->next = t;
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}
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D2(printk("start_one_shot_timer: %d us done\n", delay_us));
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local_irq_restore(flags);
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} /* start_one_shot_timer */
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static inline int fast_timer_pending (const struct fast_timer * t)
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{
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return (t->next != NULL) || (t->prev != NULL) || (t == fast_timer_list);
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}
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static inline int detach_fast_timer (struct fast_timer *t)
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{
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struct fast_timer *next, *prev;
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if (!fast_timer_pending(t))
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return 0;
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next = t->next;
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prev = t->prev;
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if (next)
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next->prev = prev;
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if (prev)
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prev->next = next;
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else
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fast_timer_list = next;
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fast_timers_deleted++;
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return 1;
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}
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int del_fast_timer(struct fast_timer * t)
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{
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unsigned long flags;
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int ret;
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local_irq_save(flags);
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ret = detach_fast_timer(t);
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t->next = t->prev = NULL;
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local_irq_restore(flags);
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return ret;
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} /* del_fast_timer */
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/* Interrupt routines or functions called in interrupt context */
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/* Timer 1 interrupt handler */
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static irqreturn_t
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timer1_handler(int irq, void *dev_id, struct pt_regs *regs)
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{
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struct fast_timer *t;
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unsigned long flags;
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local_irq_save(flags);
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/* Clear timer1 irq */
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*R_IRQ_MASK0_CLR = IO_STATE(R_IRQ_MASK0_CLR, timer1, clr);
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/* First stop timer, then ack interrupt */
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/* Stop timer */
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*R_TIMER_CTRL = r_timer_ctrl_shadow =
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(r_timer_ctrl_shadow & ~IO_MASK(R_TIMER_CTRL, tm1)) |
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IO_STATE(R_TIMER_CTRL, tm1, stop_ld);
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/* Ack interrupt */
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*R_TIMER_CTRL = r_timer_ctrl_shadow | IO_STATE(R_TIMER_CTRL, i1, clr);
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fast_timer_running = 0;
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fast_timer_ints++;
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local_irq_restore(flags);
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t = fast_timer_list;
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while (t)
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{
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struct timeval tv;
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/* Has it really expired? */
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do_gettimeofday_fast(&tv);
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D1(printk("t: %is %06ius\n", tv.tv_sec, tv.tv_usec));
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if (timeval_cmp(&t->tv_expires, &tv) <= 0)
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{
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/* Yes it has expired */
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#ifdef FAST_TIMER_LOG
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timer_expired_log[fast_timers_expired % NUM_TIMER_STATS] = *t;
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#endif
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fast_timers_expired++;
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/* Remove this timer before call, since it may reuse the timer */
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local_irq_save(flags);
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if (t->prev)
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{
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t->prev->next = t->next;
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}
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else
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{
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fast_timer_list = t->next;
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}
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if (t->next)
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{
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t->next->prev = t->prev;
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}
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t->prev = NULL;
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t->next = NULL;
|
|
local_irq_restore(flags);
|
|
|
|
if (t->function != NULL)
|
|
{
|
|
t->function(t->data);
|
|
}
|
|
else
|
|
{
|
|
DEBUG_LOG("!timer1 %i function==NULL!\n", fast_timer_ints);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Timer is to early, let's set it again using the normal routines */
|
|
D1(printk(".\n"));
|
|
}
|
|
|
|
local_irq_save(flags);
|
|
if ((t = fast_timer_list) != NULL)
|
|
{
|
|
/* Start next timer.. */
|
|
long us;
|
|
struct timeval tv;
|
|
|
|
do_gettimeofday_fast(&tv);
|
|
us = ((t->tv_expires.tv_sec - tv.tv_sec) * 1000000 +
|
|
t->tv_expires.tv_usec - tv.tv_usec);
|
|
if (us > 0)
|
|
{
|
|
if (!fast_timer_running)
|
|
{
|
|
#ifdef FAST_TIMER_LOG
|
|
timer_started_log[fast_timers_started % NUM_TIMER_STATS] = *t;
|
|
#endif
|
|
start_timer1(us);
|
|
}
|
|
local_irq_restore(flags);
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
/* Timer already expired, let's handle it better late than never.
|
|
* The normal loop handles it
|
|
*/
|
|
D1(printk("e! %d\n", us));
|
|
}
|
|
}
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
if (!t)
|
|
{
|
|
D1(printk("t1 stop!\n"));
|
|
}
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static void wake_up_func(unsigned long data)
|
|
{
|
|
#ifdef DECLARE_WAITQUEUE
|
|
wait_queue_head_t *sleep_wait_p = (wait_queue_head_t*)data;
|
|
#else
|
|
struct wait_queue **sleep_wait_p = (struct wait_queue **)data;
|
|
#endif
|
|
wake_up(sleep_wait_p);
|
|
}
|
|
|
|
|
|
/* Useful API */
|
|
|
|
void schedule_usleep(unsigned long us)
|
|
{
|
|
struct fast_timer t;
|
|
#ifdef DECLARE_WAITQUEUE
|
|
wait_queue_head_t sleep_wait;
|
|
init_waitqueue_head(&sleep_wait);
|
|
{
|
|
DECLARE_WAITQUEUE(wait, current);
|
|
#else
|
|
struct wait_queue *sleep_wait = NULL;
|
|
struct wait_queue wait = { current, NULL };
|
|
#endif
|
|
|
|
D1(printk("schedule_usleep(%d)\n", us));
|
|
add_wait_queue(&sleep_wait, &wait);
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
start_one_shot_timer(&t, wake_up_func, (unsigned long)&sleep_wait, us,
|
|
"usleep");
|
|
schedule();
|
|
set_current_state(TASK_RUNNING);
|
|
remove_wait_queue(&sleep_wait, &wait);
|
|
D1(printk("done schedule_usleep(%d)\n", us));
|
|
#ifdef DECLARE_WAITQUEUE
|
|
}
|
|
#endif
|
|
}
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
static int proc_fasttimer_read(char *buf, char **start, off_t offset, int len
|
|
,int *eof, void *data_unused);
|
|
static struct proc_dir_entry *fasttimer_proc_entry;
|
|
#endif /* CONFIG_PROC_FS */
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
|
|
/* This value is very much based on testing */
|
|
#define BIG_BUF_SIZE (500 + NUM_TIMER_STATS * 300)
|
|
|
|
static int proc_fasttimer_read(char *buf, char **start, off_t offset, int len
|
|
,int *eof, void *data_unused)
|
|
{
|
|
unsigned long flags;
|
|
int i = 0;
|
|
int num_to_show;
|
|
struct timeval tv;
|
|
struct fast_timer *t, *nextt;
|
|
static char *bigbuf = NULL;
|
|
static unsigned long used;
|
|
|
|
if (!bigbuf && !(bigbuf = vmalloc(BIG_BUF_SIZE)))
|
|
{
|
|
used = 0;
|
|
bigbuf[0] = '\0';
|
|
return 0;
|
|
}
|
|
|
|
if (!offset || !used)
|
|
{
|
|
do_gettimeofday_fast(&tv);
|
|
|
|
used = 0;
|
|
used += sprintf(bigbuf + used, "Fast timers added: %i\n",
|
|
fast_timers_added);
|
|
used += sprintf(bigbuf + used, "Fast timers started: %i\n",
|
|
fast_timers_started);
|
|
used += sprintf(bigbuf + used, "Fast timer interrupts: %i\n",
|
|
fast_timer_ints);
|
|
used += sprintf(bigbuf + used, "Fast timers expired: %i\n",
|
|
fast_timers_expired);
|
|
used += sprintf(bigbuf + used, "Fast timers deleted: %i\n",
|
|
fast_timers_deleted);
|
|
used += sprintf(bigbuf + used, "Fast timer running: %s\n",
|
|
fast_timer_running ? "yes" : "no");
|
|
used += sprintf(bigbuf + used, "Current time: %lu.%06lu\n",
|
|
(unsigned long)tv.tv_sec,
|
|
(unsigned long)tv.tv_usec);
|
|
#ifdef FAST_TIMER_SANITY_CHECKS
|
|
used += sprintf(bigbuf + used, "Sanity failed: %i\n",
|
|
sanity_failed);
|
|
#endif
|
|
used += sprintf(bigbuf + used, "\n");
|
|
|
|
#ifdef DEBUG_LOG_INCLUDED
|
|
{
|
|
int end_i = debug_log_cnt;
|
|
i = 0;
|
|
|
|
if (debug_log_cnt_wrapped)
|
|
{
|
|
i = debug_log_cnt;
|
|
}
|
|
|
|
while ((i != end_i || (debug_log_cnt_wrapped && !used)) &&
|
|
used+100 < BIG_BUF_SIZE)
|
|
{
|
|
used += sprintf(bigbuf + used, debug_log_string[i],
|
|
debug_log_value[i]);
|
|
i = (i+1) % DEBUG_LOG_MAX;
|
|
}
|
|
}
|
|
used += sprintf(bigbuf + used, "\n");
|
|
#endif
|
|
|
|
num_to_show = (fast_timers_started < NUM_TIMER_STATS ? fast_timers_started:
|
|
NUM_TIMER_STATS);
|
|
used += sprintf(bigbuf + used, "Timers started: %i\n", fast_timers_started);
|
|
for (i = 0; i < num_to_show && (used+100 < BIG_BUF_SIZE) ; i++)
|
|
{
|
|
int cur = (fast_timers_started - i - 1) % NUM_TIMER_STATS;
|
|
|
|
#if 1 //ndef FAST_TIMER_LOG
|
|
used += sprintf(bigbuf + used, "div: %i freq: %i delay: %i"
|
|
"\n",
|
|
timer_div_settings[cur],
|
|
timer_freq_settings[cur],
|
|
timer_delay_settings[cur]
|
|
);
|
|
#endif
|
|
#ifdef FAST_TIMER_LOG
|
|
t = &timer_started_log[cur];
|
|
used += sprintf(bigbuf + used, "%-14s s: %6lu.%06lu e: %6lu.%06lu "
|
|
"d: %6li us data: 0x%08lX"
|
|
"\n",
|
|
t->name,
|
|
(unsigned long)t->tv_set.tv_sec,
|
|
(unsigned long)t->tv_set.tv_usec,
|
|
(unsigned long)t->tv_expires.tv_sec,
|
|
(unsigned long)t->tv_expires.tv_usec,
|
|
t->delay_us,
|
|
t->data
|
|
);
|
|
#endif
|
|
}
|
|
used += sprintf(bigbuf + used, "\n");
|
|
|
|
#ifdef FAST_TIMER_LOG
|
|
num_to_show = (fast_timers_added < NUM_TIMER_STATS ? fast_timers_added:
|
|
NUM_TIMER_STATS);
|
|
used += sprintf(bigbuf + used, "Timers added: %i\n", fast_timers_added);
|
|
for (i = 0; i < num_to_show && (used+100 < BIG_BUF_SIZE); i++)
|
|
{
|
|
t = &timer_added_log[(fast_timers_added - i - 1) % NUM_TIMER_STATS];
|
|
used += sprintf(bigbuf + used, "%-14s s: %6lu.%06lu e: %6lu.%06lu "
|
|
"d: %6li us data: 0x%08lX"
|
|
"\n",
|
|
t->name,
|
|
(unsigned long)t->tv_set.tv_sec,
|
|
(unsigned long)t->tv_set.tv_usec,
|
|
(unsigned long)t->tv_expires.tv_sec,
|
|
(unsigned long)t->tv_expires.tv_usec,
|
|
t->delay_us,
|
|
t->data
|
|
);
|
|
}
|
|
used += sprintf(bigbuf + used, "\n");
|
|
|
|
num_to_show = (fast_timers_expired < NUM_TIMER_STATS ? fast_timers_expired:
|
|
NUM_TIMER_STATS);
|
|
used += sprintf(bigbuf + used, "Timers expired: %i\n", fast_timers_expired);
|
|
for (i = 0; i < num_to_show && (used+100 < BIG_BUF_SIZE); i++)
|
|
{
|
|
t = &timer_expired_log[(fast_timers_expired - i - 1) % NUM_TIMER_STATS];
|
|
used += sprintf(bigbuf + used, "%-14s s: %6lu.%06lu e: %6lu.%06lu "
|
|
"d: %6li us data: 0x%08lX"
|
|
"\n",
|
|
t->name,
|
|
(unsigned long)t->tv_set.tv_sec,
|
|
(unsigned long)t->tv_set.tv_usec,
|
|
(unsigned long)t->tv_expires.tv_sec,
|
|
(unsigned long)t->tv_expires.tv_usec,
|
|
t->delay_us,
|
|
t->data
|
|
);
|
|
}
|
|
used += sprintf(bigbuf + used, "\n");
|
|
#endif
|
|
|
|
used += sprintf(bigbuf + used, "Active timers:\n");
|
|
local_irq_save(flags);
|
|
t = fast_timer_list;
|
|
while (t != NULL && (used+100 < BIG_BUF_SIZE))
|
|
{
|
|
nextt = t->next;
|
|
local_irq_restore(flags);
|
|
used += sprintf(bigbuf + used, "%-14s s: %6lu.%06lu e: %6lu.%06lu "
|
|
"d: %6li us data: 0x%08lX"
|
|
/* " func: 0x%08lX" */
|
|
"\n",
|
|
t->name,
|
|
(unsigned long)t->tv_set.tv_sec,
|
|
(unsigned long)t->tv_set.tv_usec,
|
|
(unsigned long)t->tv_expires.tv_sec,
|
|
(unsigned long)t->tv_expires.tv_usec,
|
|
t->delay_us,
|
|
t->data
|
|
/* , t->function */
|
|
);
|
|
local_irq_disable();
|
|
if (t->next != nextt)
|
|
{
|
|
printk(KERN_WARNING "timer removed!\n");
|
|
}
|
|
t = nextt;
|
|
}
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
if (used - offset < len)
|
|
{
|
|
len = used - offset;
|
|
}
|
|
|
|
memcpy(buf, bigbuf + offset, len);
|
|
*start = buf;
|
|
*eof = 1;
|
|
|
|
return len;
|
|
}
|
|
#endif /* PROC_FS */
|
|
|
|
#ifdef FAST_TIMER_TEST
|
|
static volatile unsigned long i = 0;
|
|
static volatile int num_test_timeout = 0;
|
|
static struct fast_timer tr[10];
|
|
static int exp_num[10];
|
|
|
|
static struct timeval tv_exp[100];
|
|
|
|
static void test_timeout(unsigned long data)
|
|
{
|
|
do_gettimeofday_fast(&tv_exp[data]);
|
|
exp_num[data] = num_test_timeout;
|
|
|
|
num_test_timeout++;
|
|
}
|
|
|
|
static void test_timeout1(unsigned long data)
|
|
{
|
|
do_gettimeofday_fast(&tv_exp[data]);
|
|
exp_num[data] = num_test_timeout;
|
|
if (data < 7)
|
|
{
|
|
start_one_shot_timer(&tr[i], test_timeout1, i, 1000, "timeout1");
|
|
i++;
|
|
}
|
|
num_test_timeout++;
|
|
}
|
|
|
|
DP(
|
|
static char buf0[2000];
|
|
static char buf1[2000];
|
|
static char buf2[2000];
|
|
static char buf3[2000];
|
|
static char buf4[2000];
|
|
);
|
|
|
|
static char buf5[6000];
|
|
static int j_u[1000];
|
|
|
|
static void fast_timer_test(void)
|
|
{
|
|
int prev_num;
|
|
int j;
|
|
|
|
struct timeval tv, tv0, tv1, tv2;
|
|
|
|
printk("fast_timer_test() start\n");
|
|
do_gettimeofday_fast(&tv);
|
|
|
|
for (j = 0; j < 1000; j++)
|
|
{
|
|
j_u[j] = GET_JIFFIES_USEC();
|
|
}
|
|
for (j = 0; j < 100; j++)
|
|
{
|
|
do_gettimeofday_fast(&tv_exp[j]);
|
|
}
|
|
printk("fast_timer_test() %is %06i\n", tv.tv_sec, tv.tv_usec);
|
|
|
|
for (j = 0; j < 1000; j++)
|
|
{
|
|
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]);
|
|
j += 4;
|
|
}
|
|
for (j = 0; j < 100; j++)
|
|
{
|
|
printk("%i.%i %i.%i %i.%i %i.%i %i.%i\n",
|
|
tv_exp[j].tv_sec,tv_exp[j].tv_usec,
|
|
tv_exp[j+1].tv_sec,tv_exp[j+1].tv_usec,
|
|
tv_exp[j+2].tv_sec,tv_exp[j+2].tv_usec,
|
|
tv_exp[j+3].tv_sec,tv_exp[j+3].tv_usec,
|
|
tv_exp[j+4].tv_sec,tv_exp[j+4].tv_usec);
|
|
j += 4;
|
|
}
|
|
do_gettimeofday_fast(&tv0);
|
|
start_one_shot_timer(&tr[i], test_timeout, i, 50000, "test0");
|
|
DP(proc_fasttimer_read(buf0, NULL, 0, 0, 0));
|
|
i++;
|
|
start_one_shot_timer(&tr[i], test_timeout, i, 70000, "test1");
|
|
DP(proc_fasttimer_read(buf1, NULL, 0, 0, 0));
|
|
i++;
|
|
start_one_shot_timer(&tr[i], test_timeout, i, 40000, "test2");
|
|
DP(proc_fasttimer_read(buf2, NULL, 0, 0, 0));
|
|
i++;
|
|
start_one_shot_timer(&tr[i], test_timeout, i, 60000, "test3");
|
|
DP(proc_fasttimer_read(buf3, NULL, 0, 0, 0));
|
|
i++;
|
|
start_one_shot_timer(&tr[i], test_timeout1, i, 55000, "test4xx");
|
|
DP(proc_fasttimer_read(buf4, NULL, 0, 0, 0));
|
|
i++;
|
|
do_gettimeofday_fast(&tv1);
|
|
|
|
proc_fasttimer_read(buf5, NULL, 0, 0, 0);
|
|
|
|
prev_num = num_test_timeout;
|
|
while (num_test_timeout < i)
|
|
{
|
|
if (num_test_timeout != prev_num)
|
|
{
|
|
prev_num = num_test_timeout;
|
|
}
|
|
}
|
|
do_gettimeofday_fast(&tv2);
|
|
printk("Timers started %is %06i\n", tv0.tv_sec, tv0.tv_usec);
|
|
printk("Timers started at %is %06i\n", tv1.tv_sec, tv1.tv_usec);
|
|
printk("Timers done %is %06i\n", tv2.tv_sec, tv2.tv_usec);
|
|
DP(printk("buf0:\n");
|
|
printk(buf0);
|
|
printk("buf1:\n");
|
|
printk(buf1);
|
|
printk("buf2:\n");
|
|
printk(buf2);
|
|
printk("buf3:\n");
|
|
printk(buf3);
|
|
printk("buf4:\n");
|
|
printk(buf4);
|
|
);
|
|
printk("buf5:\n");
|
|
printk(buf5);
|
|
|
|
printk("timers set:\n");
|
|
for(j = 0; j<i; j++)
|
|
{
|
|
struct fast_timer *t = &tr[j];
|
|
printk("%-10s set: %6is %06ius exp: %6is %06ius "
|
|
"data: 0x%08X func: 0x%08X\n",
|
|
t->name,
|
|
t->tv_set.tv_sec,
|
|
t->tv_set.tv_usec,
|
|
t->tv_expires.tv_sec,
|
|
t->tv_expires.tv_usec,
|
|
t->data,
|
|
t->function
|
|
);
|
|
|
|
printk(" del: %6ius did exp: %6is %06ius as #%i error: %6li\n",
|
|
t->delay_us,
|
|
tv_exp[j].tv_sec,
|
|
tv_exp[j].tv_usec,
|
|
exp_num[j],
|
|
(tv_exp[j].tv_sec - t->tv_expires.tv_sec)*1000000 + tv_exp[j].tv_usec - t->tv_expires.tv_usec);
|
|
}
|
|
proc_fasttimer_read(buf5, NULL, 0, 0, 0);
|
|
printk("buf5 after all done:\n");
|
|
printk(buf5);
|
|
printk("fast_timer_test() done\n");
|
|
}
|
|
#endif
|
|
|
|
|
|
void fast_timer_init(void)
|
|
{
|
|
/* For some reason, request_irq() hangs when called froom time_init() */
|
|
if (!fast_timer_is_init)
|
|
{
|
|
#if 0 && defined(FAST_TIMER_TEST)
|
|
int i;
|
|
#endif
|
|
|
|
printk(KERN_INFO "fast_timer_init()\n");
|
|
|
|
#if 0 && defined(FAST_TIMER_TEST)
|
|
for (i = 0; i <= TIMER0_DIV; i++)
|
|
{
|
|
/* We must be careful not to get overflow... */
|
|
printk("%3i %6u\n", i, timer0_value_us[i]);
|
|
}
|
|
#endif
|
|
#ifdef CONFIG_PROC_FS
|
|
if ((fasttimer_proc_entry = create_proc_entry( "fasttimer", 0, 0 )))
|
|
fasttimer_proc_entry->read_proc = proc_fasttimer_read;
|
|
#endif /* PROC_FS */
|
|
if(request_irq(TIMER1_IRQ_NBR, timer1_handler, 0,
|
|
"fast timer int", NULL))
|
|
{
|
|
printk("err: timer1 irq\n");
|
|
}
|
|
fast_timer_is_init = 1;
|
|
#ifdef FAST_TIMER_TEST
|
|
printk("do test\n");
|
|
fast_timer_test();
|
|
#endif
|
|
}
|
|
}
|