From b179b72fad5c88c3b616fb88a9ae7cbbc1a750d3 Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Fri, 8 May 2009 16:17:36 +0900 Subject: sh: Rename arch/sh/kernel/time_32.c to arch/sh/kernel/time.c. This is now fully generic, and used both by _32 and _64 variants. Rename it accordingly. Signed-off-by: Paul Mundt diff --git a/arch/sh/kernel/Makefile_32 b/arch/sh/kernel/Makefile_32 index 5b1d4d0..aee08af 100644 --- a/arch/sh/kernel/Makefile_32 +++ b/arch/sh/kernel/Makefile_32 @@ -11,7 +11,7 @@ endif obj-y := debugtraps.o idle.o io.o io_generic.o irq.o \ machvec.o process_32.o ptrace_32.o setup.o signal_32.o \ - sys_sh.o sys_sh32.o syscalls_32.o time_32.o topology.o \ + sys_sh.o sys_sh32.o syscalls_32.o time.o topology.o \ traps.o traps_32.o obj-y += cpu/ timers/ diff --git a/arch/sh/kernel/Makefile_64 b/arch/sh/kernel/Makefile_64 index 4667d4c..31f6ebf 100644 --- a/arch/sh/kernel/Makefile_64 +++ b/arch/sh/kernel/Makefile_64 @@ -2,7 +2,7 @@ extra-y := head_64.o init_task.o vmlinux.lds obj-y := debugtraps.o idle.o io.o io_generic.o irq.o machvec.o process_64.o \ ptrace_64.o setup.o signal_64.o sys_sh.o sys_sh64.o \ - syscalls_64.o time_32.o topology.o traps.o traps_64.o + syscalls_64.o time.o topology.o traps.o traps_64.o obj-y += cpu/ timers/ obj-$(CONFIG_VSYSCALL) += vsyscall/ diff --git a/arch/sh/kernel/time.c b/arch/sh/kernel/time.c new file mode 100644 index 0000000..d41ca4c --- /dev/null +++ b/arch/sh/kernel/time.c @@ -0,0 +1,231 @@ +/* + * arch/sh/kernel/time_32.c + * + * Copyright (C) 1999 Tetsuya Okada & Niibe Yutaka + * Copyright (C) 2000 Philipp Rumpf + * Copyright (C) 2002 - 2009 Paul Mundt + * Copyright (C) 2002 M. R. Brown + * + * Some code taken from i386 version. + * Copyright (C) 1991, 1992, 1995 Linus Torvalds + */ +#include +#include +#include +#include +#include +#include +#include +#include /* for rtc_lock */ +#include +#include +#include +#include +#include +#include +#include + +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; + +unsigned int get_rtc_time(struct rtc_time *tm) +{ + if (rtc_sh_get_time != null_rtc_get_time) { + struct timespec tv; + + rtc_sh_get_time(&tv); + rtc_time_to_tm(tv.tv_sec, tm); + } + + return RTC_24H; +} +EXPORT_SYMBOL(get_rtc_time); + +int set_rtc_time(struct rtc_time *tm) +{ + unsigned long secs; + + rtc_tm_to_time(tm, &secs); + return rtc_sh_set_time(secs); +} +EXPORT_SYMBOL(set_rtc_time); + +static int __init rtc_generic_init(void) +{ + struct platform_device *pdev; + + if (rtc_sh_get_time == null_rtc_get_time) + return -ENODEV; + + pdev = platform_device_register_simple("rtc-generic", -1, NULL, 0); + if (IS_ERR(pdev)) + return PTR_ERR(pdev); + + return 0; +} +module_init(rtc_generic_init); + +/* 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", +}; + +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); +} + +static void __init sh_late_time_init(void) +{ + /* + * Make sure all compiled-in early timers register themselves. + * Run probe() for one "earlytimer" device. + */ + early_platform_driver_register_all("earlytimer"); + if (early_platform_driver_probe("earlytimer", 1, 0)) + return; + + /* + * 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); +} + +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 + + late_time_init = sh_late_time_init; +} + diff --git a/arch/sh/kernel/time_32.c b/arch/sh/kernel/time_32.c deleted file mode 100644 index d41ca4c..0000000 --- a/arch/sh/kernel/time_32.c +++ /dev/null @@ -1,231 +0,0 @@ -/* - * arch/sh/kernel/time_32.c - * - * Copyright (C) 1999 Tetsuya Okada & Niibe Yutaka - * Copyright (C) 2000 Philipp Rumpf - * Copyright (C) 2002 - 2009 Paul Mundt - * Copyright (C) 2002 M. R. Brown - * - * Some code taken from i386 version. - * Copyright (C) 1991, 1992, 1995 Linus Torvalds - */ -#include -#include -#include -#include -#include -#include -#include -#include /* for rtc_lock */ -#include -#include -#include -#include -#include -#include -#include - -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; - -unsigned int get_rtc_time(struct rtc_time *tm) -{ - if (rtc_sh_get_time != null_rtc_get_time) { - struct timespec tv; - - rtc_sh_get_time(&tv); - rtc_time_to_tm(tv.tv_sec, tm); - } - - return RTC_24H; -} -EXPORT_SYMBOL(get_rtc_time); - -int set_rtc_time(struct rtc_time *tm) -{ - unsigned long secs; - - rtc_tm_to_time(tm, &secs); - return rtc_sh_set_time(secs); -} -EXPORT_SYMBOL(set_rtc_time); - -static int __init rtc_generic_init(void) -{ - struct platform_device *pdev; - - if (rtc_sh_get_time == null_rtc_get_time) - return -ENODEV; - - pdev = platform_device_register_simple("rtc-generic", -1, NULL, 0); - if (IS_ERR(pdev)) - return PTR_ERR(pdev); - - return 0; -} -module_init(rtc_generic_init); - -/* 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", -}; - -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); -} - -static void __init sh_late_time_init(void) -{ - /* - * Make sure all compiled-in early timers register themselves. - * Run probe() for one "earlytimer" device. - */ - early_platform_driver_register_all("earlytimer"); - if (early_platform_driver_probe("earlytimer", 1, 0)) - return; - - /* - * 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); -} - -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 - - late_time_init = sh_late_time_init; -} - -- cgit v0.10.2