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801 lines
21 KiB
C
801 lines
21 KiB
C
/*
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* linux/arch/cris/kernel/fasttimer.c
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*
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* Fast timers for ETRAX FS
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*
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* Copyright (C) 2000-2006 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/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/irq.h>
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#include <hwregs/reg_map.h>
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#include <hwregs/reg_rdwr.h>
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#include <hwregs/timer_defs.h>
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#include <asm/fasttimer.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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/*
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* timer0 is running at 100MHz and generating jiffies timer ticks
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* at 100 or 1000 HZ.
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* fasttimer gives an API that gives timers that expire "between" the jiffies
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* giving microsecond resolution (10 ns).
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* fasttimer uses reg_timer_rw_trig register to get interrupt when
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* r_time reaches a certain value.
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*/
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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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static int sanity_failed;
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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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static unsigned int fast_timer_running;
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static unsigned int fast_timers_added;
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static unsigned int fast_timers_started;
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static unsigned int fast_timers_expired;
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static unsigned int fast_timers_deleted;
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static unsigned int fast_timer_is_init;
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static unsigned int fast_timer_ints;
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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 unsigned int debug_log_cnt;
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static unsigned int debug_log_cnt_wrapped;
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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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#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_delay_settings[NUM_TIMER_STATS];
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struct work_struct fast_work;
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static void
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timer_trig_handler(struct work_struct *work);
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/* Not true gettimeofday, only checks the jiffies (uptime) + useconds */
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inline void do_gettimeofday_fast(struct fasttime_t *tv)
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{
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tv->tv_jiff = jiffies;
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tv->tv_usec = GET_JIFFIES_USEC();
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}
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inline int fasttime_cmp(struct fasttime_t *t0, struct fasttime_t *t1)
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{
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/* Compare jiffies. Takes care of wrapping */
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if (time_before(t0->tv_jiff, t1->tv_jiff))
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return -1;
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else if (time_after(t0->tv_jiff, t1->tv_jiff))
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return 1;
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/* Compare us */
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if (t0->tv_usec < t1->tv_usec)
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return -1;
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else if (t0->tv_usec > t1->tv_usec)
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return 1;
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return 0;
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}
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/* Called with ints off */
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inline void start_timer_trig(unsigned long delay_us)
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{
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reg_timer_rw_ack_intr ack_intr = { 0 };
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reg_timer_rw_intr_mask intr_mask;
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reg_timer_rw_trig trig;
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reg_timer_rw_trig_cfg trig_cfg = { 0 };
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reg_timer_r_time r_time0;
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reg_timer_r_time r_time1;
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unsigned char trig_wrap;
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unsigned char time_wrap;
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r_time0 = REG_RD(timer, regi_timer0, r_time);
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D1(printk("start_timer_trig : %d us freq: %i div: %i\n",
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delay_us, freq_index, div));
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/* Clear trig irq */
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intr_mask = REG_RD(timer, regi_timer0, rw_intr_mask);
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intr_mask.trig = 0;
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REG_WR(timer, regi_timer0, rw_intr_mask, intr_mask);
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/* Set timer values and check if trigger wraps. */
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/* r_time is 100MHz (10 ns resolution) */
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trig_wrap = (trig = r_time0 + delay_us*(1000/10)) < r_time0;
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timer_div_settings[fast_timers_started % NUM_TIMER_STATS] = trig;
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timer_delay_settings[fast_timers_started % NUM_TIMER_STATS] = delay_us;
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/* Ack interrupt */
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ack_intr.trig = 1;
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REG_WR(timer, regi_timer0, rw_ack_intr, ack_intr);
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/* Start timer */
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REG_WR(timer, regi_timer0, rw_trig, trig);
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trig_cfg.tmr = regk_timer_time;
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REG_WR(timer, regi_timer0, rw_trig_cfg, trig_cfg);
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/* Check if we have already passed the trig time */
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r_time1 = REG_RD(timer, regi_timer0, r_time);
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time_wrap = r_time1 < r_time0;
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if ((trig_wrap && !time_wrap) || (r_time1 < trig)) {
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/* No, Enable trig irq */
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intr_mask = REG_RD(timer, regi_timer0, rw_intr_mask);
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intr_mask.trig = 1;
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REG_WR(timer, regi_timer0, rw_intr_mask, intr_mask);
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fast_timers_started++;
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fast_timer_running = 1;
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} else {
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/* We have passed the time, disable trig point, ack intr */
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trig_cfg.tmr = regk_timer_off;
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REG_WR(timer, regi_timer0, rw_trig_cfg, trig_cfg);
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REG_WR(timer, regi_timer0, rw_ack_intr, ack_intr);
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/* call the int routine */
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INIT_WORK(&fast_work, timer_trig_handler);
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schedule_work(&fast_work);
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}
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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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#ifdef FAST_TIMER_SANITY_CHECKS
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/* Check so this is not in the list already... */
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while (tmp != NULL) {
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if (tmp == t) {
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printk(KERN_DEBUG
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"timer name: %s data: 0x%08lX already "
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"in list!\n", name, data);
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sanity_failed++;
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goto done;
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} else
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tmp = tmp->next;
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}
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tmp = fast_timer_list;
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#endif
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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_jiff = t->tv_set.tv_jiff + delay_us / 1000000 / HZ;
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if (t->tv_expires.tv_usec > 1000000) {
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t->tv_expires.tv_usec -= 1000000;
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t->tv_expires.tv_jiff += HZ;
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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 || fasttime_cmp(&t->tv_expires, &tmp->tv_expires) < 0) {
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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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fast_timer_list->prev = t;
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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_timer_trig(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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fasttime_cmp(&t->tv_expires, &tmp->next->tv_expires) > 0)
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tmp = tmp->next;
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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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done:
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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 interrupt handler for trig interrupts */
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static irqreturn_t
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timer_trig_interrupt(int irq, void *dev_id)
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{
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reg_timer_r_masked_intr masked_intr;
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/* Check if the timer interrupt is for us (a trig int) */
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masked_intr = REG_RD(timer, regi_timer0, r_masked_intr);
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if (!masked_intr.trig)
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return IRQ_NONE;
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timer_trig_handler(NULL);
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return IRQ_HANDLED;
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}
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static void timer_trig_handler(struct work_struct *work)
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{
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reg_timer_rw_ack_intr ack_intr = { 0 };
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reg_timer_rw_intr_mask intr_mask;
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reg_timer_rw_trig_cfg trig_cfg = { 0 };
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struct fast_timer *t;
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unsigned long flags;
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/* We keep interrupts disabled not only when we modify the
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* fast timer list, but any time we hold a reference to a
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* timer in the list, since del_fast_timer may be called
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* from (another) interrupt context. Thus, the only time
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* when interrupts are enabled is when calling the timer
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* callback function.
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*/
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local_irq_save(flags);
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/* Clear timer trig interrupt */
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intr_mask = REG_RD(timer, regi_timer0, rw_intr_mask);
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intr_mask.trig = 0;
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REG_WR(timer, regi_timer0, rw_intr_mask, intr_mask);
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/* First stop timer, then ack interrupt */
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/* Stop timer */
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trig_cfg.tmr = regk_timer_off;
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REG_WR(timer, regi_timer0, rw_trig_cfg, trig_cfg);
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/* Ack interrupt */
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ack_intr.trig = 1;
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REG_WR(timer, regi_timer0, rw_ack_intr, ack_intr);
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fast_timer_running = 0;
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fast_timer_ints++;
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fast_timer_function_type *f;
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unsigned long d;
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t = fast_timer_list;
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while (t) {
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struct fasttime_t tv;
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/* Has it really expired? */
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do_gettimeofday_fast(&tv);
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D1(printk(KERN_DEBUG
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"t: %is %06ius\n", tv.tv_jiff, tv.tv_usec));
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if (fasttime_cmp(&t->tv_expires, &tv) <= 0) {
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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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if (t->prev)
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t->prev->next = t->next;
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else
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fast_timer_list = t->next;
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if (t->next)
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t->next->prev = t->prev;
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t->prev = NULL;
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t->next = NULL;
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/* Save function callback data before enabling
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* interrupts, since the timer may be removed and we
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* don't know how it was allocated (e.g. ->function
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* and ->data may become overwritten after deletion
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* if the timer was stack-allocated).
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*/
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f = t->function;
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d = t->data;
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if (f != NULL) {
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/* Run the callback function with interrupts
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* enabled. */
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local_irq_restore(flags);
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f(d);
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local_irq_save(flags);
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} else
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DEBUG_LOG("!trimertrig %i function==NULL!\n", fast_timer_ints);
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} else {
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/* Timer is to early, let's set it again using the normal routines */
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D1(printk(".\n"));
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}
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t = fast_timer_list;
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if (t != NULL) {
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/* Start next timer.. */
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long us = 0;
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struct fasttime_t tv;
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do_gettimeofday_fast(&tv);
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/* time_after_eq takes care of wrapping */
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if (time_after_eq(t->tv_expires.tv_jiff, tv.tv_jiff))
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us = ((t->tv_expires.tv_jiff - tv.tv_jiff) *
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1000000 / HZ + t->tv_expires.tv_usec -
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tv.tv_usec);
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if (us > 0) {
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if (!fast_timer_running) {
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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_timer_trig(us);
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}
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break;
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} else {
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/* Timer already expired, let's handle it better late than never.
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* The normal loop handles it
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*/
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D1(printk("e! %d\n", us));
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}
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}
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}
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local_irq_restore(flags);
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if (!t)
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D1(printk("ttrig stop!\n"));
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}
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static void wake_up_func(unsigned long data)
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{
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wait_queue_head_t *sleep_wait_p = (wait_queue_head_t*)data;
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wake_up(sleep_wait_p);
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}
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/* Useful API */
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void schedule_usleep(unsigned long us)
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{
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struct fast_timer t;
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wait_queue_head_t sleep_wait;
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init_waitqueue_head(&sleep_wait);
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D1(printk("schedule_usleep(%d)\n", us));
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start_one_shot_timer(&t, wake_up_func, (unsigned long)&sleep_wait, us,
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"usleep");
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/* Uninterruptible sleep on the fast timer. (The condition is
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* somewhat redundant since the timer is what wakes us up.) */
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wait_event(sleep_wait, !fast_timer_pending(&t));
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D1(printk("done schedule_usleep(%d)\n", us));
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}
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#ifdef CONFIG_PROC_FS
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/* This value is very much based on testing */
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#define BIG_BUF_SIZE (500 + NUM_TIMER_STATS * 300)
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static int proc_fasttimer_show(struct seq_file *m, void *v)
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{
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unsigned long flags;
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int i = 0;
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int num_to_show;
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struct fasttime_t tv;
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struct fast_timer *t, *nextt;
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do_gettimeofday_fast(&tv);
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seq_printf(m, "Fast timers added: %i\n", fast_timers_added);
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seq_printf(m, "Fast timers started: %i\n", fast_timers_started);
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seq_printf(m, "Fast timer interrupts: %i\n", fast_timer_ints);
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seq_printf(m, "Fast timers expired: %i\n", fast_timers_expired);
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seq_printf(m, "Fast timers deleted: %i\n", fast_timers_deleted);
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seq_printf(m, "Fast timer running: %s\n",
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fast_timer_running ? "yes" : "no");
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seq_printf(m, "Current time: %lu.%06lu\n",
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(unsigned long)tv.tv_jiff,
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(unsigned long)tv.tv_usec);
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#ifdef FAST_TIMER_SANITY_CHECKS
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seq_printf(m, "Sanity failed: %i\n", sanity_failed);
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#endif
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seq_putc(m, '\n');
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#ifdef DEBUG_LOG_INCLUDED
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{
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int end_i = debug_log_cnt;
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i = 0;
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if (debug_log_cnt_wrapped)
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i = debug_log_cnt;
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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 | IRQF_DISABLED,
|
|
"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);
|