diff options
| author | Dmitry Osipenko <digetx@gmail.com> | 2016-10-24 16:26:50 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2016-10-24 16:26:50 +0100 |
| commit | 2b5c0322b7d9d2032578bd1efccf72f4ab1b7074 (patch) | |
| tree | 742da49d300521b572555c8b23cf6aed81f8a63d /include/hw | |
| parent | a2519ad1828dd443af9f9c293db18db6d6123762 (diff) | |
hw/ptimer: Add "wraparound after one period" policy
Currently, periodic counter wraps around immediately once counter reaches
"0", this is wrong behaviour for some of the timers, resulting in one period
being lost. Add new ptimer policy that provides correct behaviour for such
timers, so that counter stays with "0" for a one period before wrapping
around.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Message-id: f22a670cf1f4be298b31640cb5f4be1df0f20ab6.1475421224.git.digetx@gmail.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'include/hw')
| -rw-r--r-- | include/hw/ptimer.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/hw/ptimer.h b/include/hw/ptimer.h index 26c7fdcd75..03441cbc22 100644 --- a/include/hw/ptimer.h +++ b/include/hw/ptimer.h @@ -35,6 +35,10 @@ */ #define PTIMER_POLICY_DEFAULT 0 +/* Periodic timer counter stays with "0" for a one period before wrapping + * around. */ +#define PTIMER_POLICY_WRAP_AFTER_ONE_PERIOD (1 << 0) + /* ptimer.c */ typedef struct ptimer_state ptimer_state; typedef void (*ptimer_cb)(void *opaque); |