diff options
Diffstat (limited to 'arch/um/kernel/time.c')
| -rw-r--r-- | arch/um/kernel/time.c | 73 |
1 files changed, 48 insertions, 25 deletions
diff --git a/arch/um/kernel/time.c b/arch/um/kernel/time.c index 5af441efb377..25c23666d592 100644 --- a/arch/um/kernel/time.c +++ b/arch/um/kernel/time.c @@ -1,4 +1,7 @@ /* + * Copyright (C) 2015 Anton Ivanov (aivanov@{brocade.com,kot-begemot.co.uk}) + * Copyright (C) 2015 Thomas Meyer (thomas@m3y3r.de) + * Copyright (C) 2012-2014 Cisco Systems * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ @@ -7,11 +10,15 @@ #include <linux/init.h> #include <linux/interrupt.h> #include <linux/jiffies.h> +#include <linux/mm.h> +#include <linux/sched.h> +#include <linux/spinlock.h> #include <linux/threads.h> #include <asm/irq.h> #include <asm/param.h> #include <kern_util.h> #include <os.h> +#include <timer-internal.h> void timer_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs) { @@ -24,81 +31,97 @@ void timer_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs) static int itimer_shutdown(struct clock_event_device *evt) { - disable_timer(); + os_timer_disable(); return 0; } static int itimer_set_periodic(struct clock_event_device *evt) { - set_interval(); + os_timer_set_interval(NULL, NULL); return 0; } static int itimer_next_event(unsigned long delta, struct clock_event_device *evt) { - return timer_one_shot(delta + 1); + return os_timer_one_shot(delta); } -static struct clock_event_device itimer_clockevent = { - .name = "itimer", +static int itimer_one_shot(struct clock_event_device *evt) +{ + os_timer_one_shot(1); + return 0; +} + +static struct clock_event_device timer_clockevent = { + .name = "posix-timer", .rating = 250, .cpumask = cpu_all_mask, .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT, .set_state_shutdown = itimer_shutdown, .set_state_periodic = itimer_set_periodic, - .set_state_oneshot = itimer_shutdown, + .set_state_oneshot = itimer_one_shot, .set_next_event = itimer_next_event, - .shift = 32, + .shift = 0, + .max_delta_ns = 0xffffffff, + .min_delta_ns = TIMER_MIN_DELTA, //microsecond resolution should be enough for anyone, same as 640K RAM .irq = 0, + .mult = 1, }; static irqreturn_t um_timer(int irq, void *dev) { - (*itimer_clockevent.event_handler)(&itimer_clockevent); + if (get_current()->mm != NULL) + { + /* userspace - relay signal, results in correct userspace timers */ + os_alarm_process(get_current()->mm->context.id.u.pid); + } + + (*timer_clockevent.event_handler)(&timer_clockevent); return IRQ_HANDLED; } -static cycle_t itimer_read(struct clocksource *cs) +static cycle_t timer_read(struct clocksource *cs) { - return os_nsecs() / 1000; + return os_nsecs() / TIMER_MULTIPLIER; } -static struct clocksource itimer_clocksource = { - .name = "itimer", +static struct clocksource timer_clocksource = { + .name = "timer", .rating = 300, - .read = itimer_read, + .read = timer_read, .mask = CLOCKSOURCE_MASK(64), .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; -static void __init setup_itimer(void) +static void __init timer_setup(void) { int err; - err = request_irq(TIMER_IRQ, um_timer, 0, "timer", NULL); + err = request_irq(TIMER_IRQ, um_timer, IRQF_TIMER, "hr timer", NULL); if (err != 0) printk(KERN_ERR "register_timer : request_irq failed - " "errno = %d\n", -err); - itimer_clockevent.mult = div_sc(HZ, NSEC_PER_SEC, 32); - itimer_clockevent.max_delta_ns = - clockevent_delta2ns(60 * HZ, &itimer_clockevent); - itimer_clockevent.min_delta_ns = - clockevent_delta2ns(1, &itimer_clockevent); - err = clocksource_register_hz(&itimer_clocksource, USEC_PER_SEC); + err = os_timer_create(NULL); + if (err != 0) { + printk(KERN_ERR "creation of timer failed - errno = %d\n", -err); + return; + } + + err = clocksource_register_hz(&timer_clocksource, NSEC_PER_SEC/TIMER_MULTIPLIER); if (err) { printk(KERN_ERR "clocksource_register_hz returned %d\n", err); return; } - clockevents_register_device(&itimer_clockevent); + clockevents_register_device(&timer_clockevent); } void read_persistent_clock(struct timespec *ts) { - long long nsecs = os_nsecs(); + long long nsecs = os_persistent_clock_emulation(); set_normalized_timespec(ts, nsecs / NSEC_PER_SEC, nsecs % NSEC_PER_SEC); @@ -106,6 +129,6 @@ void read_persistent_clock(struct timespec *ts) void __init time_init(void) { - timer_init(); - late_time_init = setup_itimer; + timer_set_signal_handler(); + late_time_init = timer_setup; } |