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Message-Id: <1425936776-13686-4-git-send-email-rabin@rab.in>
Date: Mon, 9 Mar 2015 22:32:56 +0100
From: Rabin Vincent <rabin@....in>
To: jesper.nilsson@...s.com
Cc: linux-kernel@...r.kernel.org, linux-cris-kernel@...s.com,
Rabin Vincent <rabin@....in>
Subject: [PATCH 4/4] CRISv32: remove fast timer API
This fast timer API appears to provide an old pre-hrtimers
implementation of sub-jiffy-resolution timers. No driver uses this API
in mainline CRISv32 and we have support for hrtimers now, so remove it.
Signed-off-by: Rabin Vincent <rabin@....in>
---
arch/cris/Kconfig | 5 +-
arch/cris/arch-v32/kernel/Makefile | 1 -
arch/cris/arch-v32/kernel/fasttimer.c | 800 ----------------------------------
3 files changed, 3 insertions(+), 803 deletions(-)
delete mode 100644 arch/cris/arch-v32/kernel/fasttimer.c
diff --git a/arch/cris/Kconfig b/arch/cris/Kconfig
index 0314e32..fd30a64 100644
--- a/arch/cris/Kconfig
+++ b/arch/cris/Kconfig
@@ -100,8 +100,9 @@ config ETRAX_WATCHDOG_NICE_DOGGY
production releases.
config ETRAX_FAST_TIMER
- bool "Enable ETRAX fast timer API"
- help
+ bool "Enable ETRAX fast timer API"
+ depends on ETRAX_ARCH_V10
+ help
This options enables the API to a fast timer implementation using
timer1 to get sub jiffie resolution timers (primarily one-shot
timers).
diff --git a/arch/cris/arch-v32/kernel/Makefile b/arch/cris/arch-v32/kernel/Makefile
index d9fc617..266ff33 100644
--- a/arch/cris/arch-v32/kernel/Makefile
+++ b/arch/cris/arch-v32/kernel/Makefile
@@ -10,7 +10,6 @@ obj-y := entry.o traps.o irq.o debugport.o \
cache.o cacheflush.o
obj-$(CONFIG_ETRAX_KGDB) += kgdb.o kgdb_asm.o
-obj-$(CONFIG_ETRAX_FAST_TIMER) += fasttimer.o
obj-$(CONFIG_MODULES) += crisksyms.o
clean:
diff --git a/arch/cris/arch-v32/kernel/fasttimer.c b/arch/cris/arch-v32/kernel/fasttimer.c
deleted file mode 100644
index b130c2c..0000000
--- a/arch/cris/arch-v32/kernel/fasttimer.c
+++ /dev/null
@@ -1,800 +0,0 @@
-/*
- * linux/arch/cris/kernel/fasttimer.c
- *
- * Fast timers for ETRAX FS
- *
- * Copyright (C) 2000-2006 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 <hwregs/reg_map.h>
-#include <hwregs/reg_rdwr.h>
-#include <hwregs/timer_defs.h>
-#include <asm/fasttimer.h>
-#include <linux/proc_fs.h>
-#include <linux/seq_file.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
-static int sanity_failed;
-#endif
-
-#define D1(x)
-#define D2(x)
-#define DP(x)
-
-static unsigned int fast_timer_running;
-static unsigned int fast_timers_added;
-static unsigned int fast_timers_started;
-static unsigned int fast_timers_expired;
-static unsigned int fast_timers_deleted;
-static unsigned int fast_timer_is_init;
-static unsigned int fast_timer_ints;
-
-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 unsigned int debug_log_cnt;
-static unsigned int debug_log_cnt_wrapped;
-
-#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];
-
-struct work_struct fast_work;
-
-static void
-timer_trig_handler(struct work_struct *work);
-
-
-
-/* Not true gettimeofday, only checks the jiffies (uptime) + useconds */
-inline void do_gettimeofday_fast(struct fasttime_t *tv)
-{
- tv->tv_jiff = jiffies;
- tv->tv_usec = GET_JIFFIES_USEC();
-}
-
-inline int fasttime_cmp(struct fasttime_t *t0, struct fasttime_t *t1)
-{
- /* Compare jiffies. Takes care of wrapping */
- if (time_before(t0->tv_jiff, t1->tv_jiff))
- return -1;
- else if (time_after(t0->tv_jiff, t1->tv_jiff))
- return 1;
-
- /* Compare us */
- 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 */
-inline void 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_time0;
- reg_timer_r_time r_time1;
- unsigned char trig_wrap;
- unsigned char time_wrap;
-
- r_time0 = REG_RD(timer, regi_timer0, 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_timer0, rw_intr_mask);
- intr_mask.trig = 0;
- REG_WR(timer, regi_timer0, rw_intr_mask, intr_mask);
-
- /* Set timer values and check if trigger wraps. */
- /* r_time is 100MHz (10 ns resolution) */
- trig_wrap = (trig = r_time0 + delay_us*(1000/10)) < r_time0;
-
- 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_timer0, rw_ack_intr, ack_intr);
-
- /* Start timer */
- REG_WR(timer, regi_timer0, rw_trig, trig);
- trig_cfg.tmr = regk_timer_time;
- REG_WR(timer, regi_timer0, rw_trig_cfg, trig_cfg);
-
- /* Check if we have already passed the trig time */
- r_time1 = REG_RD(timer, regi_timer0, r_time);
- time_wrap = r_time1 < r_time0;
-
- if ((trig_wrap && !time_wrap) || (r_time1 < trig)) {
- /* No, Enable trig irq */
- intr_mask = REG_RD(timer, regi_timer0, rw_intr_mask);
- intr_mask.trig = 1;
- REG_WR(timer, regi_timer0, 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_timer0, rw_trig_cfg, trig_cfg);
- REG_WR(timer, regi_timer0, rw_ack_intr, ack_intr);
- /* call the int routine */
- INIT_WORK(&fast_work, timer_trig_handler);
- schedule_work(&fast_work);
- }
-
-}
-
-/* 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;
-
-#ifdef FAST_TIMER_SANITY_CHECKS
- /* Check so this is not in the list already... */
- while (tmp != NULL) {
- if (tmp == t) {
- printk(KERN_DEBUG
- "timer name: %s data: 0x%08lX already "
- "in list!\n", name, data);
- sanity_failed++;
- goto done;
- } else
- tmp = tmp->next;
- }
- tmp = fast_timer_list;
-#endif
-
- 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_jiff = t->tv_set.tv_jiff + delay_us / 1000000 / HZ;
- if (t->tv_expires.tv_usec > 1000000) {
- t->tv_expires.tv_usec -= 1000000;
- t->tv_expires.tv_jiff += HZ;
- }
-#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 || fasttime_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 &&
- fasttime_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));
-
-done:
- 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)
-{
- reg_timer_r_masked_intr masked_intr;
- /* Check if the timer interrupt is for us (a trig int) */
- masked_intr = REG_RD(timer, regi_timer0, r_masked_intr);
- if (!masked_intr.trig)
- return IRQ_NONE;
- timer_trig_handler(NULL);
- return IRQ_HANDLED;
-}
-
-static void timer_trig_handler(struct work_struct *work)
-{
- 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;
-
- /* We keep interrupts disabled not only when we modify the
- * fast timer list, but any time we hold a reference to a
- * timer in the list, since del_fast_timer may be called
- * from (another) interrupt context. Thus, the only time
- * when interrupts are enabled is when calling the timer
- * callback function.
- */
- local_irq_save(flags);
-
- /* Clear timer trig interrupt */
- intr_mask = REG_RD(timer, regi_timer0, rw_intr_mask);
- intr_mask.trig = 0;
- REG_WR(timer, regi_timer0, rw_intr_mask, intr_mask);
-
- /* First stop timer, then ack interrupt */
- /* Stop timer */
- trig_cfg.tmr = regk_timer_off;
- REG_WR(timer, regi_timer0, rw_trig_cfg, trig_cfg);
-
- /* Ack interrupt */
- ack_intr.trig = 1;
- REG_WR(timer, regi_timer0, rw_ack_intr, ack_intr);
-
- fast_timer_running = 0;
- fast_timer_ints++;
-
- fast_timer_function_type *f;
- unsigned long d;
-
- t = fast_timer_list;
- while (t) {
- struct fasttime_t tv;
-
- /* Has it really expired? */
- do_gettimeofday_fast(&tv);
- D1(printk(KERN_DEBUG
- "t: %is %06ius\n", tv.tv_jiff, tv.tv_usec));
-
- if (fasttime_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 */
- 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;
-
- /* Save function callback data before enabling
- * interrupts, since the timer may be removed and we
- * don't know how it was allocated (e.g. ->function
- * and ->data may become overwritten after deletion
- * if the timer was stack-allocated).
- */
- f = t->function;
- d = t->data;
-
- if (f != NULL) {
- /* Run the callback function with interrupts
- * enabled. */
- local_irq_restore(flags);
- f(d);
- local_irq_save(flags);
- } 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"));
- }
-
- t = fast_timer_list;
- if (t != NULL) {
- /* Start next timer.. */
- long us = 0;
- struct fasttime_t tv;
-
- do_gettimeofday_fast(&tv);
-
- /* time_after_eq takes care of wrapping */
- if (time_after_eq(t->tv_expires.tv_jiff, tv.tv_jiff))
- us = ((t->tv_expires.tv_jiff - tv.tv_jiff) *
- 1000000 / HZ + 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);
- }
- 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)
-{
- wait_queue_head_t *sleep_wait_p = (wait_queue_head_t*)data;
- wake_up(sleep_wait_p);
-}
-
-
-/* Useful API */
-
-void schedule_usleep(unsigned long us)
-{
- struct fast_timer t;
- wait_queue_head_t sleep_wait;
- init_waitqueue_head(&sleep_wait);
-
- D1(printk("schedule_usleep(%d)\n", us));
- start_one_shot_timer(&t, wake_up_func, (unsigned long)&sleep_wait, us,
- "usleep");
- /* Uninterruptible sleep on the fast timer. (The condition is
- * somewhat redundant since the timer is what wakes us up.) */
- wait_event(sleep_wait, !fast_timer_pending(&t));
-
- D1(printk("done schedule_usleep(%d)\n", us));
-}
-
-#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_show(struct seq_file *m, void *v)
-{
- unsigned long flags;
- int i = 0;
- int num_to_show;
- struct fasttime_t tv;
- struct fast_timer *t, *nextt;
-
- do_gettimeofday_fast(&tv);
-
- seq_printf(m, "Fast timers added: %i\n", fast_timers_added);
- seq_printf(m, "Fast timers started: %i\n", fast_timers_started);
- seq_printf(m, "Fast timer interrupts: %i\n", fast_timer_ints);
- seq_printf(m, "Fast timers expired: %i\n", fast_timers_expired);
- seq_printf(m, "Fast timers deleted: %i\n", fast_timers_deleted);
- seq_printf(m, "Fast timer running: %s\n",
- fast_timer_running ? "yes" : "no");
- seq_printf(m, "Current time: %lu.%06lu\n",
- (unsigned long)tv.tv_jiff,
- (unsigned long)tv.tv_usec);
-#ifdef FAST_TIMER_SANITY_CHECKS
- seq_printf(m, "Sanity failed: %i\n", sanity_failed);
-#endif
- seq_putc(m, '\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)) {
- if (seq_printf(m, debug_log_string[i], debug_log_value[i]) < 0)
- return 0;
- i = (i+1) % DEBUG_LOG_MAX;
- }
- }
- seq_putc(m, '\n');
-#endif
-
- num_to_show = (fast_timers_started < NUM_TIMER_STATS ? fast_timers_started:
- NUM_TIMER_STATS);
- seq_printf(m, "Timers started: %i\n", fast_timers_started);
- for (i = 0; i < num_to_show; i++) {
- int cur = (fast_timers_started - i - 1) % NUM_TIMER_STATS;
-
-#if 1 //ndef FAST_TIMER_LOG
- seq_printf(m, "div: %i delay: %i"
- "\n",
- timer_div_settings[cur],
- timer_delay_settings[cur]);
-#endif
-#ifdef FAST_TIMER_LOG
- t = &timer_started_log[cur];
- if (seq_printf(m, "%-14s s: %6lu.%06lu e: %6lu.%06lu "
- "d: %6li us data: 0x%08lX"
- "\n",
- t->name,
- (unsigned long)t->tv_set.tv_jiff,
- (unsigned long)t->tv_set.tv_usec,
- (unsigned long)t->tv_expires.tv_jiff,
- (unsigned long)t->tv_expires.tv_usec,
- t->delay_us,
- t->data) < 0)
- return 0;
-#endif
- }
- seq_putc(m, '\n');
-
-#ifdef FAST_TIMER_LOG
- num_to_show = (fast_timers_added < NUM_TIMER_STATS ? fast_timers_added:
- NUM_TIMER_STATS);
- seq_printf(m, "Timers added: %i\n", fast_timers_added);
- for (i = 0; i < num_to_show; i++) {
- t = &timer_added_log[(fast_timers_added - i - 1) % NUM_TIMER_STATS];
- if (seq_printf(m, "%-14s s: %6lu.%06lu e: %6lu.%06lu "
- "d: %6li us data: 0x%08lX"
- "\n",
- t->name,
- (unsigned long)t->tv_set.tv_jiff,
- (unsigned long)t->tv_set.tv_usec,
- (unsigned long)t->tv_expires.tv_jiff,
- (unsigned long)t->tv_expires.tv_usec,
- t->delay_us,
- t->data) < 0)
- return 0;
- }
- seq_putc(m, '\n');
-
- num_to_show = (fast_timers_expired < NUM_TIMER_STATS ? fast_timers_expired:
- NUM_TIMER_STATS);
- seq_printf(m, "Timers expired: %i\n", fast_timers_expired);
- for (i = 0; i < num_to_show; i++){
- t = &timer_expired_log[(fast_timers_expired - i - 1) % NUM_TIMER_STATS];
- if (seq_printf(m, "%-14s s: %6lu.%06lu e: %6lu.%06lu "
- "d: %6li us data: 0x%08lX"
- "\n",
- t->name,
- (unsigned long)t->tv_set.tv_jiff,
- (unsigned long)t->tv_set.tv_usec,
- (unsigned long)t->tv_expires.tv_jiff,
- (unsigned long)t->tv_expires.tv_usec,
- t->delay_us,
- t->data) < 0)
- return 0;
- }
- seq_putc(m, '\n');
-#endif
-
- seq_puts(m, "Active timers:\n");
- local_irq_save(flags);
- t = fast_timer_list;
- while (t != NULL){
- nextt = t->next;
- local_irq_restore(flags);
- if (seq_printf(m, "%-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_jiff,
- (unsigned long)t->tv_set.tv_usec,
- (unsigned long)t->tv_expires.tv_jiff,
- (unsigned long)t->tv_expires.tv_usec,
- t->delay_us,
- t->data
-/* , t->function */
- ) < 0)
- return 0;
- local_irq_save(flags);
- if (t->next != nextt)
- printk("timer removed!\n");
- t = nextt;
- }
- local_irq_restore(flags);
- return 0;
-}
-
-static int proc_fasttimer_open(struct inode *inode, struct file *file)
-{
- return single_open_size(file, proc_fasttimer_show, PDE_DATA(inode), BIG_BUF_SIZE);
-}
-
-static const struct file_operations proc_fasttimer_fops = {
- .open = proc_fasttimer_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-#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 fasttime_t 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 fasttime_t 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(KERN_DEBUG "fast_timer_test() %is %06i\n", tv.tv_jiff, tv.tv_usec);
-
- for (j = 0; j < 1000; j++)
- {
- printk(KERN_DEBUG "%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(KERN_DEBUG "%i.%i %i.%i %i.%i %i.%i %i.%i\n",
- tv_exp[j].tv_jiff, tv_exp[j].tv_usec,
- tv_exp[j+1].tv_jiff, tv_exp[j+1].tv_usec,
- tv_exp[j+2].tv_jiff, tv_exp[j+2].tv_usec,
- tv_exp[j+3].tv_jiff, tv_exp[j+3].tv_usec,
- tv_exp[j+4].tv_jiff, 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(KERN_INFO "Timers started %is %06i\n",
- tv0.tv_jiff, tv0.tv_usec);
- printk(KERN_INFO "Timers started at %is %06i\n",
- tv1.tv_jiff, tv1.tv_usec);
- printk(KERN_INFO "Timers done %is %06i\n",
- tv2.tv_jiff, 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_jiff,
- t->tv_set.tv_usec,
- t->tv_expires.tv_jiff,
- 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_jiff,
- tv_exp[j].tv_usec,
- exp_num[j],
- (tv_exp[j].tv_jiff - t->tv_expires.tv_jiff) *
- 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
-
-
-int 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
- proc_create("fasttimer", 0, NULL, &proc_fasttimer_fops);
-#endif /* PROC_FS */
- if (request_irq(TIMER0_INTR_VECT, timer_trig_interrupt,
- IRQF_SHARED,
- "fast timer int", &fast_timer_list))
- printk(KERN_ERR "err: fasttimer irq\n");
- fast_timer_is_init = 1;
-#ifdef FAST_TIMER_TEST
- printk("do test\n");
- fast_timer_test();
-#endif
- }
- return 0;
-}
-__initcall(fast_timer_init);
--
2.1.4
--
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