Commit 869e92b5 authored by Dmitry Osipenko's avatar Dmitry Osipenko Committed by Peter Maydell
Browse files

hw/ptimer: Support "on the fly" timer mode switch 



Allow switching between periodic <-> oneshot modes while timer is running.

Signed-off-by: default avatarDmitry Osipenko <digetx@gmail.com>
Reviewed-by: default avatarPeter Crosthwaite <crosthwaite.peter@gmail.com>
Message-id: f030be6e28fbd219e1e8d22297aee367bd9af5bb.1464367869.git.digetx@gmail.com
Signed-off-by: default avatarPeter Maydell <peter.maydell@linaro.org>
parent 7ef6e3cf

hw/core/ptimer.c

+7 −6
Original line number Diff line number Diff line
@@ -163,17 +163,18 @@ void ptimer_set_count(ptimer_state *s, uint64_t count) 


void ptimer_run(ptimer_state *s, int oneshot)

{

    if (s->enabled) {

        return;

    }

    if (s->period == 0) {

    bool was_disabled = !s->enabled;



    if (was_disabled && s->period == 0) {

        fprintf(stderr, "Timer with period zero, disabling\n");

        return;

    }

    s->enabled = oneshot ? 2 : 1;

    if (was_disabled) {

        s->next_event = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);

        ptimer_reload(s);

    }

}



/* Pause a timer.  Note that this may cause it to "lose" time, even if it

   is immediately restarted.  */