diff options
Diffstat (limited to 'arch/sh/kernel/time_32.c')
| -rw-r--r-- | arch/sh/kernel/time_32.c | 240 |
1 files changed, 0 insertions, 240 deletions
diff --git a/arch/sh/kernel/time_32.c b/arch/sh/kernel/time_32.c deleted file mode 100644 index 1700d2465f6..00000000000 --- a/arch/sh/kernel/time_32.c +++ /dev/null @@ -1,240 +0,0 @@ -/* - * arch/sh/kernel/time_32.c - * - * Copyright (C) 1999 Tetsuya Okada & Niibe Yutaka - * Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org> - * Copyright (C) 2002 - 2008 Paul Mundt - * Copyright (C) 2002 M. R. Brown <mrbrown@linux-sh.org> - * - * Some code taken from i386 version. - * Copyright (C) 1991, 1992, 1995 Linus Torvalds - */ -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/init.h> -#include <linux/profile.h> -#include <linux/timex.h> -#include <linux/sched.h> -#include <linux/clockchips.h> -#include <linux/mc146818rtc.h> /* for rtc_lock */ -#include <linux/smp.h> -#include <asm/clock.h> -#include <asm/rtc.h> -#include <asm/timer.h> -#include <asm/kgdb.h> - -struct sys_timer *sys_timer; - -/* Move this somewhere more sensible.. */ -DEFINE_SPINLOCK(rtc_lock); -EXPORT_SYMBOL(rtc_lock); - -/* Dummy RTC ops */ -static void null_rtc_get_time(struct timespec *tv) -{ - tv->tv_sec = mktime(2000, 1, 1, 0, 0, 0); - tv->tv_nsec = 0; -} - -static int null_rtc_set_time(const time_t secs) -{ - return 0; -} - -void (*rtc_sh_get_time)(struct timespec *) = null_rtc_get_time; -int (*rtc_sh_set_time)(const time_t) = null_rtc_set_time; - -#ifndef CONFIG_GENERIC_TIME -void do_gettimeofday(struct timeval *tv) -{ - unsigned long flags; - unsigned long seq; - unsigned long usec, sec; - - do { - /* - * Turn off IRQs when grabbing xtime_lock, so that - * the sys_timer get_offset code doesn't have to handle it. - */ - seq = read_seqbegin_irqsave(&xtime_lock, flags); - usec = get_timer_offset(); - sec = xtime.tv_sec; - usec += xtime.tv_nsec / NSEC_PER_USEC; - } while (read_seqretry_irqrestore(&xtime_lock, seq, flags)); - - while (usec >= 1000000) { - usec -= 1000000; - sec++; - } - - tv->tv_sec = sec; - tv->tv_usec = usec; -} -EXPORT_SYMBOL(do_gettimeofday); - -int do_settimeofday(struct timespec *tv) -{ - time_t wtm_sec, sec = tv->tv_sec; - long wtm_nsec, nsec = tv->tv_nsec; - - if ((unsigned long)tv->tv_nsec >= NSEC_PER_SEC) - return -EINVAL; - - write_seqlock_irq(&xtime_lock); - /* - * This is revolting. We need to set "xtime" correctly. However, the - * value in this location is the value at the most recent update of - * wall time. Discover what correction gettimeofday() would have - * made, and then undo it! - */ - nsec -= get_timer_offset() * NSEC_PER_USEC; - - wtm_sec = wall_to_monotonic.tv_sec + (xtime.tv_sec - sec); - wtm_nsec = wall_to_monotonic.tv_nsec + (xtime.tv_nsec - nsec); - - set_normalized_timespec(&xtime, sec, nsec); - set_normalized_timespec(&wall_to_monotonic, wtm_sec, wtm_nsec); - - ntp_clear(); - write_sequnlock_irq(&xtime_lock); - clock_was_set(); - - return 0; -} -EXPORT_SYMBOL(do_settimeofday); -#endif /* !CONFIG_GENERIC_TIME */ - -/* last time the RTC clock got updated */ -static long last_rtc_update; - -/* - * handle_timer_tick() needs to keep up the real-time clock, - * as well as call the "do_timer()" routine every clocktick - */ -void handle_timer_tick(void) -{ - if (current->pid) - profile_tick(CPU_PROFILING); - - /* - * Here we are in the timer irq handler. We just have irqs locally - * disabled but we don't know if the timer_bh is running on the other - * CPU. We need to avoid to SMP race with it. NOTE: we don' t need - * the irq version of write_lock because as just said we have irq - * locally disabled. -arca - */ - write_seqlock(&xtime_lock); - do_timer(1); - - /* - * If we have an externally synchronized Linux clock, then update - * RTC clock accordingly every ~11 minutes. Set_rtc_mmss() has to be - * called as close as possible to 500 ms before the new second starts. - */ - if (ntp_synced() && - xtime.tv_sec > last_rtc_update + 660 && - (xtime.tv_nsec / 1000) >= 500000 - ((unsigned) TICK_SIZE) / 2 && - (xtime.tv_nsec / 1000) <= 500000 + ((unsigned) TICK_SIZE) / 2) { - if (rtc_sh_set_time(xtime.tv_sec) == 0) - last_rtc_update = xtime.tv_sec; - else - /* do it again in 60s */ - last_rtc_update = xtime.tv_sec - 600; - } - write_sequnlock(&xtime_lock); - -#ifndef CONFIG_SMP - update_process_times(user_mode(get_irq_regs())); -#endif -} - -#ifdef CONFIG_PM -int timer_suspend(struct sys_device *dev, pm_message_t state) -{ - struct sys_timer *sys_timer = container_of(dev, struct sys_timer, dev); - - sys_timer->ops->stop(); - - return 0; -} - -int timer_resume(struct sys_device *dev) -{ - struct sys_timer *sys_timer = container_of(dev, struct sys_timer, dev); - - sys_timer->ops->start(); - - return 0; -} -#else -#define timer_suspend NULL -#define timer_resume NULL -#endif - -static struct sysdev_class timer_sysclass = { - .name = "timer", - .suspend = timer_suspend, - .resume = timer_resume, -}; - -static int __init timer_init_sysfs(void) -{ - int ret; - - if (!sys_timer) - return 0; - - ret = sysdev_class_register(&timer_sysclass); - if (ret != 0) - return ret; - - sys_timer->dev.cls = &timer_sysclass; - return sysdev_register(&sys_timer->dev); -} -device_initcall(timer_init_sysfs); - -void (*board_time_init)(void); - -struct clocksource clocksource_sh = { - .name = "SuperH", -}; - -#ifdef CONFIG_GENERIC_TIME -unsigned long long sched_clock(void) -{ - unsigned long long cycles; - - /* jiffies based sched_clock if no clocksource is installed */ - if (!clocksource_sh.rating) - return (unsigned long long)jiffies * (NSEC_PER_SEC / HZ); - - cycles = clocksource_sh.read(&clocksource_sh); - return cyc2ns(&clocksource_sh, cycles); -} -#endif - -void __init time_init(void) -{ - if (board_time_init) - board_time_init(); - - clk_init(); - - rtc_sh_get_time(&xtime); - set_normalized_timespec(&wall_to_monotonic, - -xtime.tv_sec, -xtime.tv_nsec); - -#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST - local_timer_setup(smp_processor_id()); -#endif - - /* - * Find the timer to use as the system timer, it will be - * initialized for us. - */ - sys_timer = get_sys_timer(); - if (unlikely(!sys_timer)) - panic("System timer missing.\n"); - - printk(KERN_INFO "Using %s for system timer\n", sys_timer->name); -} |