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 --- arch/sh/kernel/time.c | 231 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 231 insertions(+) create mode 100644 arch/sh/kernel/time.c (limited to 'arch/sh/kernel/time.c') diff --git a/arch/sh/kernel/time.c b/arch/sh/kernel/time.c new file mode 100644 index 000000000000..d41ca4cf20cf --- /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; +} + -- cgit v1.2.2 From 6d134b9e8d3f32331ad2faca2db8186f54198931 Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Fri, 8 May 2009 16:36:13 +0900 Subject: sh: Wire up GENERIC_CMOS_UPDATE for the platforms that need it. Now that everything has converted over to generic timekeeping, we need an alternate method for keeping the RTC updated for those platforms that are still using the rtc_sh_get/set_time pairs, presently limited to SH-03 and the Dreamcast. This wires up the GENERIC_CMOS_UPDATE hooks for those to maintain the same behaviour. Signed-off-by: Paul Mundt --- arch/sh/kernel/time.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'arch/sh/kernel/time.c') diff --git a/arch/sh/kernel/time.c b/arch/sh/kernel/time.c index d41ca4cf20cf..77b841a99c01 100644 --- a/arch/sh/kernel/time.c +++ b/arch/sh/kernel/time.c @@ -46,6 +46,20 @@ static int null_rtc_set_time(const time_t secs) void (*rtc_sh_get_time)(struct timespec *) = null_rtc_get_time; int (*rtc_sh_set_time)(const time_t) = null_rtc_set_time; +#ifdef CONFIG_GENERIC_CMOS_UPDATE +unsigned long read_persistent_clock(void) +{ + struct timespec tv; + rtc_sh_get_time(&tv); + return tv.tv_sec; +} + +int update_persistent_clock(struct timespec now) +{ + return rtc_sh_set_time(now.tv_sec); +} +#endif + unsigned int get_rtc_time(struct rtc_time *tm) { if (rtc_sh_get_time != null_rtc_get_time) { -- cgit v1.2.2 From 5ac5496411b30d41945a996fe7a7fb5abccf2aaa Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Fri, 8 May 2009 16:44:00 +0900 Subject: sh: Kill off dead handle_timer_tick() code. Nothing is using this anymore now that we have fully converted to generic time, so kill it off completely. Signed-off-by: Paul Mundt --- arch/sh/kernel/time.c | 53 ++++----------------------------------------------- 1 file changed, 4 insertions(+), 49 deletions(-) (limited to 'arch/sh/kernel/time.c') diff --git a/arch/sh/kernel/time.c b/arch/sh/kernel/time.c index 77b841a99c01..f4c304adec42 100644 --- a/arch/sh/kernel/time.c +++ b/arch/sh/kernel/time.c @@ -1,13 +1,14 @@ /* - * arch/sh/kernel/time_32.c + * arch/sh/kernel/time.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 + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. */ #include #include @@ -23,7 +24,6 @@ #include #include #include -#include struct sys_timer *sys_timer; @@ -97,50 +97,6 @@ static int __init rtc_generic_init(void) } 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) { @@ -242,4 +198,3 @@ void __init time_init(void) late_time_init = sh_late_time_init; } - -- cgit v1.2.2 From 6459d7bb72e9767bc7d22f2ee44aab35188e4b8a Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Fri, 8 May 2009 16:47:48 +0900 Subject: sh: Kill off dead timer sysclass pm hooks. With the conversion to generic clockevents these are completely unused, so just kill it off. Signed-off-by: Paul Mundt --- arch/sh/kernel/time.c | 45 --------------------------------------------- 1 file changed, 45 deletions(-) (limited to 'arch/sh/kernel/time.c') diff --git a/arch/sh/kernel/time.c b/arch/sh/kernel/time.c index f4c304adec42..c26576a5a454 100644 --- a/arch/sh/kernel/time.c +++ b/arch/sh/kernel/time.c @@ -97,51 +97,6 @@ static int __init rtc_generic_init(void) } module_init(rtc_generic_init); -#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 = { -- cgit v1.2.2 From 1af2fe45fec15bdba446c22b9b602699cdabfc9f Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Fri, 8 May 2009 16:59:05 +0900 Subject: sh: Kill off the global rtc_lock with extreme prejudice. Now that all of the possible users for rtc_lock have gone away, it is no longer necessary to keep this lock definition around. This follows several other architectures that have either recently dropped it or never supported it in the first place. Signed-off-by: Paul Mundt --- arch/sh/kernel/time.c | 5 ----- 1 file changed, 5 deletions(-) (limited to 'arch/sh/kernel/time.c') diff --git a/arch/sh/kernel/time.c b/arch/sh/kernel/time.c index c26576a5a454..e0aa769481ff 100644 --- a/arch/sh/kernel/time.c +++ b/arch/sh/kernel/time.c @@ -17,7 +17,6 @@ #include #include #include -#include /* for rtc_lock */ #include #include #include @@ -27,10 +26,6 @@ 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) { -- cgit v1.2.2 From 780f98ff1fa9cfcab177f6b5ab09b11321f1e5c8 Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Mon, 11 May 2009 12:15:14 +0900 Subject: sh: Account for INITIAL_JIFFIES when using jiffies clocksource. In the case where we fall back on the generic jiffies clocksource, INITIAL_JIFFIES needs to be accounted for so that printk times aren't completely skewed. Signed-off-by: Paul Mundt --- arch/sh/kernel/time.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/sh/kernel/time.c') diff --git a/arch/sh/kernel/time.c b/arch/sh/kernel/time.c index e0aa769481ff..a77838f539f8 100644 --- a/arch/sh/kernel/time.c +++ b/arch/sh/kernel/time.c @@ -104,7 +104,7 @@ unsigned long long sched_clock(void) /* jiffies based sched_clock if no clocksource is installed */ if (!clocksource_sh.rating) - return (unsigned long long)jiffies * (NSEC_PER_SEC / HZ); + return (jiffies_64 - INITIAL_JIFFIES) * (NSEC_PER_SEC / HZ); cycles = clocksource_sh.read(&clocksource_sh); return cyc2ns(&clocksource_sh, cycles); -- cgit v1.2.2 From 8be5f1a68f2c14082939dd54e7037dcee2eb54f8 Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Tue, 12 May 2009 19:53:55 +0900 Subject: sh: Kill off the remnants of the old timer code. Now with all of the TMU users moved over to the new TMU driver, and the old TMU driver killed off, the left-over infrastructure can go along with it. Signed-off-by: Paul Mundt --- arch/sh/kernel/time.c | 29 ++--------------------------- 1 file changed, 2 insertions(+), 27 deletions(-) (limited to 'arch/sh/kernel/time.c') diff --git a/arch/sh/kernel/time.c b/arch/sh/kernel/time.c index a77838f539f8..2edde32c764b 100644 --- a/arch/sh/kernel/time.c +++ b/arch/sh/kernel/time.c @@ -22,9 +22,6 @@ #include #include #include -#include - -struct sys_timer *sys_timer; /* Dummy RTC ops */ static void null_rtc_get_time(struct timespec *tv) @@ -94,20 +91,9 @@ module_init(rtc_generic_init); 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 (jiffies_64 - INITIAL_JIFFIES) * (NSEC_PER_SEC / HZ); - - cycles = clocksource_sh.read(&clocksource_sh); - return cyc2ns(&clocksource_sh, cycles); + return (jiffies_64 - INITIAL_JIFFIES) * (NSEC_PER_SEC / HZ); } static void __init sh_late_time_init(void) @@ -117,18 +103,7 @@ static void __init sh_late_time_init(void) * 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); + early_platform_driver_probe("earlytimer", 1, 0); } void __init time_init(void) -- cgit v1.2.2