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6ab3d5624e
android_kernel_xiaomi_sm8350/arch/cris/arch-v32/kernel/fasttimer.c
Jörn Engel 6ab3d5624e Remove obsolete #include <linux/config.h> 
Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
2006-06-30 19:25:36 +02:00

996 lines
26 KiB
C
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/* $Id: fasttimer.c,v 1.11 2005/01/04 11:15:46 starvik Exp $
* linux/arch/cris/kernel/fasttimer.c
*
* Fast timers for ETRAX FS
* This may be useful in other OS than Linux so use 2 space indentation...
*
* $Log: fasttimer.c,v $
* Revision 1.11 2005/01/04 11:15:46 starvik
* Don't share timer IRQ.
*
* Revision 1.10 2004/12/07 09:19:38 starvik
* Corrected includes.
* Use correct interrupt macros.
*
* Revision 1.9 2004/05/14 10:18:58 starvik
* Export fast_timer_list
*
* Revision 1.8 2004/05/14 07:58:03 starvik
* Merge of changes from 2.4
*
* Revision 1.7 2003/07/10 12:06:14 starvik
* Return IRQ_NONE if irq wasn't handled
*
* Revision 1.6 2003/07/04 08:27:49 starvik
* Merge of Linux 2.5.74
*
* Revision 1.5 2003/06/05 10:16:22 johana
* New INTR_VECT macros.
*
* Revision 1.4 2003/06/03 08:49:45 johana
* Fixed typo.
*
* Revision 1.3 2003/06/02 12:51:27 johana
* Now compiles.
* Commented some include files that probably can be removed.
*
* Revision 1.2 2003/06/02 12:09:41 johana
* Ported to ETRAX FS using the trig interrupt instead of timer1.
*
* Revision 1.3 2002/12/12 08:26:32 starvik
* Don't use C-comments inside CVS comments
*
* Revision 1.2 2002/12/11 15:42:02 starvik
* Extracted v10 (ETRAX 100LX) specific stuff from arch/cris/kernel/
*
* Revision 1.1 2002/11/18 07:58:06 starvik
* Fast timers (from Linux 2.4)
*
* Revision 1.5 2002/10/15 06:21:39 starvik
* Added call to init_waitqueue_head
*
* Revision 1.4 2002/05/28 17:47:59 johana
* Added del_fast_timer()
*
* Revision 1.3 2002/05/28 16:16:07 johana
* Handle empty fast_timer_list
*
* Revision 1.2 2002/05/27 15:38:42 johana
* Made it compile without warnings on Linux 2.4.
* (includes, wait_queue, PROC_FS and snprintf)
*
* Revision 1.1 2002/05/27 15:32:25 johana
* arch/etrax100/kernel/fasttimer.c v1.8 from the elinux tree.
*
* Revision 1.8 2001/11/27 13:50:40 pkj
* Disable interrupts while stopping the timer and while modifying the
* list of active timers in timer1_handler() as it may be interrupted
* by other interrupts (e.g., the serial interrupt) which may add fast
* timers.
*
* Revision 1.7 2001/11/22 11:50:32 pkj
* * Only store information about the last 16 timers.
* * proc_fasttimer_read() now uses an allocated buffer, since it
* requires more space than just a page even for only writing the
* last 16 timers. The buffer is only allocated on request, so
* unless /proc/fasttimer is read, it is never allocated.
* * Renamed fast_timer_started to fast_timers_started to match
* fast_timers_added and fast_timers_expired.
* * Some clean-up.
*
* Revision 1.6 2000/12/13 14:02:08 johana
* Removed volatile for fast_timer_list
*
* Revision 1.5 2000/12/13 13:55:35 johana
* Added DEBUG_LOG, added som cli() and cleanup
*
* Revision 1.4 2000/12/05 13:48:50 johana
* Added range check when writing proc file, modified timer int handling
*
* Revision 1.3 2000/11/23 10:10:20 johana
* More debug/logging possibilities.
* Moved GET_JIFFIES_USEC() to timex.h and time.c
*
* Revision 1.2 2000/11/01 13:41:04 johana
* Clean up and bugfixes.
* Created new do_gettimeofday_fast() that gets a timeval struct
* with time based on jiffies and *R_TIMER0_DATA, uses a table
* for fast conversion of timer value to microseconds.
* (Much faster the standard do_gettimeofday() and we don't really
* wan't to use the true time - we wan't the "uptime" so timers don't screw up
* when we change the time.
* TODO: Add efficient support for continuous timers as well.
*
* Revision 1.1 2000/10/26 15:49:16 johana
* Added fasttimer, highresolution timers.
*
* Copyright (C) 2000,2001 2002, 2003 Axis Communications AB, Lund, Sweden
*/
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/param.h>
#include <linux/string.h>
#include <linux/vmalloc.h>
#include <linux/interrupt.h>
#include <linux/time.h>
#include <linux/delay.h>
#include <asm/irq.h>
#include <asm/system.h>
#include <linux/version.h>
#include <asm/arch/hwregs/reg_map.h>
#include <asm/arch/hwregs/reg_rdwr.h>
#include <asm/arch/hwregs/timer_defs.h>
#include <asm/fasttimer.h>
#include <linux/proc_fs.h>
/*
* timer0 is running at 100MHz and generating jiffies timer ticks
* at 100 or 1000 HZ.
* fasttimer gives an API that gives timers that expire "between" the jiffies
* giving microsecond resolution (10 ns).
* fasttimer uses reg_timer_rw_trig register to get interrupt when
* r_time reaches a certain value.
*/
#define DEBUG_LOG_INCLUDED
#define FAST_TIMER_LOG
//#define FAST_TIMER_TEST
#define FAST_TIMER_SANITY_CHECKS
#ifdef FAST_TIMER_SANITY_CHECKS
#define SANITYCHECK(x) x
static int sanity_failed = 0;
#else
#define SANITYCHECK(x)
#endif
#define D1(x)
#define D2(x)
#define DP(x)
#define __INLINE__ inline
static int fast_timer_running = 0;
static int fast_timers_added = 0;
static int fast_timers_started = 0;
static int fast_timers_expired = 0;
static int fast_timers_deleted = 0;
static int fast_timer_is_init = 0;
static int fast_timer_ints = 0;
struct fast_timer *fast_timer_list = NULL;
#ifdef DEBUG_LOG_INCLUDED
#define DEBUG_LOG_MAX 128
static const char * debug_log_string[DEBUG_LOG_MAX];
static unsigned long debug_log_value[DEBUG_LOG_MAX];
static int debug_log_cnt = 0;
static int debug_log_cnt_wrapped = 0;
#define DEBUG_LOG(string, value) \
{ \
unsigned long log_flags; \
local_irq_save(log_flags); \
debug_log_string[debug_log_cnt] = (string); \
debug_log_value[debug_log_cnt] = (unsigned long)(value); \
if (++debug_log_cnt >= DEBUG_LOG_MAX) \
{ \
debug_log_cnt = debug_log_cnt % DEBUG_LOG_MAX; \
debug_log_cnt_wrapped = 1; \
} \
local_irq_restore(log_flags); \
}
#else
#define DEBUG_LOG(string, value)
#endif
#define NUM_TIMER_STATS 16
#ifdef FAST_TIMER_LOG
struct fast_timer timer_added_log[NUM_TIMER_STATS];
struct fast_timer timer_started_log[NUM_TIMER_STATS];
struct fast_timer timer_expired_log[NUM_TIMER_STATS];
#endif
int timer_div_settings[NUM_TIMER_STATS];
int timer_delay_settings[NUM_TIMER_STATS];
static void
timer_trig_handler(void);
/* Not true gettimeofday, only checks the jiffies (uptime) + useconds */
void __INLINE__ do_gettimeofday_fast(struct timeval *tv)
{
unsigned long sec = jiffies;
unsigned long usec = GET_JIFFIES_USEC();
usec += (sec % HZ) * (1000000 / HZ);
sec = sec / HZ;
if (usec > 1000000)
{
usec -= 1000000;
sec++;
}
tv->tv_sec = sec;
tv->tv_usec = usec;
}
int __INLINE__ timeval_cmp(struct timeval *t0, struct timeval *t1)
{
if (t0->tv_sec < t1->tv_sec)
{
return -1;
}
else if (t0->tv_sec > t1->tv_sec)
{
return 1;
}
if (t0->tv_usec < t1->tv_usec)
{
return -1;
}
else if (t0->tv_usec > t1->tv_usec)
{
return 1;
}
return 0;
}
/* Called with ints off */
void __INLINE__ start_timer_trig(unsigned long delay_us)
{
reg_timer_rw_ack_intr ack_intr = { 0 };
reg_timer_rw_intr_mask intr_mask;
reg_timer_rw_trig trig;
reg_timer_rw_trig_cfg trig_cfg = { 0 };
reg_timer_r_time r_time;
r_time = REG_RD(timer, regi_timer, r_time);
D1(printk("start_timer_trig : %d us freq: %i div: %i\n",
delay_us, freq_index, div));
/* Clear trig irq */
intr_mask = REG_RD(timer, regi_timer, rw_intr_mask);
intr_mask.trig = 0;
REG_WR(timer, regi_timer, rw_intr_mask, intr_mask);
/* Set timer values */
/* r_time is 100MHz (10 ns resolution) */
trig = r_time + delay_us*(1000/10);
timer_div_settings[fast_timers_started % NUM_TIMER_STATS] = trig;
timer_delay_settings[fast_timers_started % NUM_TIMER_STATS] = delay_us;
/* Ack interrupt */
ack_intr.trig = 1;
REG_WR(timer, regi_timer, rw_ack_intr, ack_intr);
/* Start timer */
REG_WR(timer, regi_timer, rw_trig, trig);
trig_cfg.tmr = regk_timer_time;
REG_WR(timer, regi_timer, rw_trig_cfg, trig_cfg);
/* Check if we have already passed the trig time */
r_time = REG_RD(timer, regi_timer, r_time);
if (r_time < trig) {
/* No, Enable trig irq */
intr_mask = REG_RD(timer, regi_timer, rw_intr_mask);
intr_mask.trig = 1;
REG_WR(timer, regi_timer, rw_intr_mask, intr_mask);
fast_timers_started++;
fast_timer_running = 1;
}
else
{
/* We have passed the time, disable trig point, ack intr */
trig_cfg.tmr = regk_timer_off;
REG_WR(timer, regi_timer, rw_trig_cfg, trig_cfg);
REG_WR(timer, regi_timer, rw_ack_intr, ack_intr);
/* call the int routine directly */
timer_trig_handler();
}
}
/* In version 1.4 this function takes 27 - 50 us */
void start_one_shot_timer(struct fast_timer *t,
fast_timer_function_type *function,
unsigned long data,
unsigned long delay_us,
const char *name)
{
unsigned long flags;
struct fast_timer *tmp;
D1(printk("sft %s %d us\n", name, delay_us));
local_irq_save(flags);
do_gettimeofday_fast(&t->tv_set);
tmp = fast_timer_list;
SANITYCHECK({ /* Check so this is not in the list already... */
while (tmp != NULL)
{
if (tmp == t)
{
printk("timer name: %s data: 0x%08lX already in list!\n", name, data);
sanity_failed++;
return;
}
else
{
tmp = tmp->next;
}
}
tmp = fast_timer_list;
});
t->delay_us = delay_us;
t->function = function;
t->data = data;
t->name = name;
t->tv_expires.tv_usec = t->tv_set.tv_usec + delay_us % 1000000;
t->tv_expires.tv_sec = t->tv_set.tv_sec + delay_us / 1000000;
if (t->tv_expires.tv_usec > 1000000)
{
t->tv_expires.tv_usec -= 1000000;
t->tv_expires.tv_sec++;
}
#ifdef FAST_TIMER_LOG
timer_added_log[fast_timers_added % NUM_TIMER_STATS] = *t;
#endif
fast_timers_added++;
/* Check if this should timeout before anything else */
if (tmp == NULL || timeval_cmp(&t->tv_expires, &tmp->tv_expires) < 0)
{
/* Put first in list and modify the timer value */
t->prev = NULL;
t->next = fast_timer_list;
if (fast_timer_list)
{
fast_timer_list->prev = t;
}
fast_timer_list = t;
#ifdef FAST_TIMER_LOG
timer_started_log[fast_timers_started % NUM_TIMER_STATS] = *t;
#endif
start_timer_trig(delay_us);
} else {
/* Put in correct place in list */
while (tmp->next &&
timeval_cmp(&t->tv_expires, &tmp->next->tv_expires) > 0)
{
tmp = tmp->next;
}
/* Insert t after tmp */
t->prev = tmp;
t->next = tmp->next;
if (tmp->next)
{
tmp->next->prev = t;
}
tmp->next = t;
}
D2(printk("start_one_shot_timer: %d us done\n", delay_us));
local_irq_restore(flags);
} /* start_one_shot_timer */
static inline int fast_timer_pending (const struct fast_timer * t)
{
return (t->next != NULL) || (t->prev != NULL) || (t == fast_timer_list);
}
static inline int detach_fast_timer (struct fast_timer *t)
{
struct fast_timer *next, *prev;
if (!fast_timer_pending(t))
return 0;
next = t->next;
prev = t->prev;
if (next)
next->prev = prev;
if (prev)
prev->next = next;
else
fast_timer_list = next;
fast_timers_deleted++;
return 1;
}
int del_fast_timer(struct fast_timer * t)
{
unsigned long flags;
int ret;
local_irq_save(flags);
ret = detach_fast_timer(t);
t->next = t->prev = NULL;
local_irq_restore(flags);
return ret;
} /* del_fast_timer */
/* Interrupt routines or functions called in interrupt context */
/* Timer interrupt handler for trig interrupts */
static irqreturn_t
timer_trig_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
reg_timer_r_masked_intr masked_intr;
/* Check if the timer interrupt is for us (a trig int) */
masked_intr = REG_RD(timer, regi_timer, r_masked_intr);
if (!masked_intr.trig)
return IRQ_NONE;
timer_trig_handler();
return IRQ_HANDLED;
}
static void timer_trig_handler(void)
{
reg_timer_rw_ack_intr ack_intr = { 0 };
reg_timer_rw_intr_mask intr_mask;
reg_timer_rw_trig_cfg trig_cfg = { 0 };
struct fast_timer *t;
unsigned long flags;
local_irq_save(flags);
/* Clear timer trig interrupt */
intr_mask = REG_RD(timer, regi_timer, rw_intr_mask);
intr_mask.trig = 0;
REG_WR(timer, regi_timer, rw_intr_mask, intr_mask);
/* First stop timer, then ack interrupt */
/* Stop timer */
trig_cfg.tmr = regk_timer_off;
REG_WR(timer, regi_timer, rw_trig_cfg, trig_cfg);
/* Ack interrupt */
ack_intr.trig = 1;
REG_WR(timer, regi_timer, rw_ack_intr, ack_intr);
fast_timer_running = 0;
fast_timer_ints++;
local_irq_restore(flags);
t = fast_timer_list;
while (t)
{
struct timeval tv;
/* Has it really expired? */
do_gettimeofday_fast(&tv);
D1(printk("t: %is %06ius\n", tv.tv_sec, tv.tv_usec));
if (timeval_cmp(&t->tv_expires, &tv) <= 0)
{
/* Yes it has expired */
#ifdef FAST_TIMER_LOG
timer_expired_log[fast_timers_expired % NUM_TIMER_STATS] = *t;
#endif
fast_timers_expired++;
/* Remove this timer before call, since it may reuse the timer */
local_irq_save(flags);
if (t->prev)
{
t->prev->next = t->next;
}
else
{
fast_timer_list = t->next;
}
if (t->next)
{
t->next->prev = t->prev;
}
t->prev = NULL;
t->next = NULL;
local_irq_restore(flags);
if (t->function != NULL)
{
t->function(t->data);
}
else
{
DEBUG_LOG("!trimertrig %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_timer_trig(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("ttrig stop!\n"));
}
}
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
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0)
,int *eof, void *data_unused
#else
,int unused
#endif
);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0)
static struct proc_dir_entry *fasttimer_proc_entry;
#else
static struct proc_dir_entry fasttimer_proc_entry =
{
0, 9, "fasttimer",
S_IFREG | S_IRUGO, 1, 0, 0,
0, NULL /* ops -- default to array */,
&proc_fasttimer_read /* get_info */,
};
#endif
#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
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0)
,int *eof, void *data_unused
#else
,int unused
#endif
)
{
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 delay: %i"
"\n",
timer_div_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);
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("timer removed!\n");
}
t = nextt;
}
local_irq_restore(flags);
}
if (used - offset < len)
{
len = used - offset;
}
memcpy(buf, bigbuf + offset, len);
*start = buf;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0)
*eof = 1;
#endif
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)
{
printk("fast_timer_init()\n");
#ifdef CONFIG_PROC_FS
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0)
if ((fasttimer_proc_entry = create_proc_entry( "fasttimer", 0, 0 )))
fasttimer_proc_entry->read_proc = proc_fasttimer_read;
#else
proc_register_dynamic(&proc_root, &fasttimer_proc_entry);
#endif
#endif /* PROC_FS */
if(request_irq(TIMER_INTR_VECT, timer_trig_interrupt, SA_INTERRUPT,
"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
}
}
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