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528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 | /* $Id: fasttimer.c,v 1.7 2003/04/01 14:12:07 starvik Exp $ * linux/arch/cris/kernel/fasttimer.c * * Fast timers for ETRAX100/ETRAX100LX * This may be useful in other OS than Linux so use 2 space indentation... * * $Log: fasttimer.c,v $ * Revision 1.7 2003/04/01 14:12:07 starvik * Added loglevel for lots of printks * * Revision 1.6 2003/02/10 17:05:44 pkj * Made fast_timer_pending() public. * * 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/mm.h> #include <linux/vmalloc.h> #include <linux/interrupt.h> #include <linux/time.h> #include <linux/delay.h> #include <asm/segment.h> #include <asm/io.h> #include <asm/irq.h> #include <asm/delay.h> #include <asm/rtc.h> #include <linux/config.h> #include <linux/version.h> #include <asm/svinto.h> #include <asm/fasttimer.h> #include <linux/proc_fs.h> #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; \ save_flags(log_flags); \ cli(); \ 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; \ } \ restore_flags(log_flags); \ } #else #define DEBUG_LOG(string, value) #endif /* The frequencies for index = clkselx number in R_TIMER_CTRL */ #define NUM_TIMER_FREQ 15 #define MAX_USABLE_TIMER_FREQ 7 #define MAX_DELAY_US 853333L const unsigned long timer_freq_100[NUM_TIMER_FREQ] = { 3, /* 0 3333 - 853333 us */ 6, /* 1 1666 - 426666 us */ 12, /* 2 833 - 213333 us */ 24, /* 3 416 - 106666 us */ 48, /* 4 208 - 53333 us */ 96, /* 5 104 - 26666 us */ 192, /* 6 52 - 13333 us */ 384, /* 7 26 - 6666 us */ 576, 1152, 2304, 4608, 9216, 18432, 62500, /* 15 = cascade */ }; #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_freq_settings[NUM_TIMER_STATS]; int timer_delay_settings[NUM_TIMER_STATS]; /* 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; } void __INLINE__ start_timer1(unsigned long delay_us) { int freq_index = 0; /* This is the lowest resolution */ unsigned long upper_limit = MAX_DELAY_US; unsigned long div; /* Start/Restart the timer to the new shorter value */ /* t = 1/freq = 1/19200 = 53us * T=div*t, div = T/t = delay_us*freq/1000000 */ #if 1 /* Adaptive timer settings */ while (delay_us < upper_limit && freq_index < MAX_USABLE_TIMER_FREQ) { freq_index++; upper_limit >>= 1; /* Divide by 2 using shift */ } if (freq_index > 0) { freq_index--; } #else freq_index = 6; #endif div = delay_us * timer_freq_100[freq_index]/10000; if (div < 2) { /* Maybe increase timer freq? */ div = 2; } if (div > 255) { div = 0; /* This means 256, the max the timer takes */ /* If a longer timeout than the timer can handle is used, * then we must restart it when it goes off. */ } timer_div_settings[fast_timers_started % NUM_TIMER_STATS] = div; timer_freq_settings[fast_timers_started % NUM_TIMER_STATS] = freq_index; timer_delay_settings[fast_timers_started % NUM_TIMER_STATS] = delay_us; D1(printk("start_timer1 : %d us freq: %i div: %i\n", delay_us, freq_index, div)); /* Clear timer1 irq */ *R_IRQ_MASK0_CLR = IO_STATE(R_IRQ_MASK0_CLR, timer1, clr); /* Set timer values */ *R_TIMER_CTRL = r_timer_ctrl_shadow = (r_timer_ctrl_shadow & ~IO_MASK(R_TIMER_CTRL, timerdiv1) & ~IO_MASK(R_TIMER_CTRL, tm1) & ~IO_MASK(R_TIMER_CTRL, clksel1)) | IO_FIELD(R_TIMER_CTRL, timerdiv1, div) | IO_STATE(R_TIMER_CTRL, tm1, stop_ld) | IO_FIELD(R_TIMER_CTRL, clksel1, freq_index ); /* 6=c19k2Hz */ /* Ack interrupt */ *R_TIMER_CTRL = r_timer_ctrl_shadow | IO_STATE(R_TIMER_CTRL, i1, clr); /* Start timer */ *R_TIMER_CTRL = r_timer_ctrl_shadow = (r_timer_ctrl_shadow & ~IO_MASK(R_TIMER_CTRL, tm1)) | IO_STATE(R_TIMER_CTRL, tm1, run); /* Enable timer1 irq */ *R_IRQ_MASK0_SET = IO_STATE(R_IRQ_MASK0_SET, timer1, set); fast_timers_started++; fast_timer_running = 1; } /* 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)); save_flags(flags); cli(); 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(KERN_WARNING "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_timer1(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)); restore_flags(flags); } /* start_one_shot_timer */ 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; save_flags(flags); cli(); ret = detach_fast_timer(t); t->next = t->prev = NULL; restore_flags(flags); return ret; } /* del_fast_timer */ /* Interrupt routines or functions called in interrupt context */ /* Timer 1 interrupt handler */ static void timer1_handler(int irq, void *dev_id, struct pt_regs *regs) { struct fast_timer *t; unsigned long flags; save_flags(flags); cli(); /* Clear timer1 irq */ *R_IRQ_MASK0_CLR = IO_STATE(R_IRQ_MASK0_CLR, timer1, clr); /* First stop timer, then ack interrupt */ /* Stop timer */ *R_TIMER_CTRL = r_timer_ctrl_shadow = (r_timer_ctrl_shadow & ~IO_MASK(R_TIMER_CTRL, tm1)) | IO_STATE(R_TIMER_CTRL, tm1, stop_ld); /* Ack interrupt */ *R_TIMER_CTRL = r_timer_ctrl_shadow | IO_STATE(R_TIMER_CTRL, i1, clr); fast_timer_running = 0; fast_timer_ints++; restore_flags(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 */ save_flags(flags); cli(); 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; restore_flags(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")); } save_flags(flags); cli(); 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); } restore_flags(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)); } } restore_flags(flags); } if (!t) { D1(printk("t1 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 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"); save_flags(flags); cli(); t = fast_timer_list; while (t != NULL && (used+100 < BIG_BUF_SIZE)) { nextt = t->next; restore_flags(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 */ ); cli(); if (t->next != nextt) { printk(KERN_WARNING "timer removed!\n"); } t = nextt; } restore_flags(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) { #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 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(TIMER1_IRQ_NBR, timer1_handler, SA_SHIRQ, "fast timer int", NULL)) { printk(KERN_CRIT "err: timer1 irq\n"); } fast_timer_is_init = 1; #ifdef FAST_TIMER_TEST printk("do test\n"); fast_timer_test(); #endif } } |