include/hw/ptimer.h

2  * General purpose implementation of a simple periodic countdown timer.
27  * of the timer after all the changes in the transaction, and call the
29  * list of state-modifying functions and detailed semantics of the callback.)
42  * that you need and specify the right set of policy flags to get that.
48  * The rough edges of the default policy:
52  *  - Setting period to 0 of the running timer emits error message and
59  *  - Counter value of the running timer is one less than the actual value.
61  *  - Changing period/frequency of the running timer loses time elapsed
63  *    counter = counter value at the moment of change (.i.e. one less).
83 /* Make counter value of the running timer represent the actual value and
119  * is called it will evaluate the state of the timer after all the
145  * for a list of these), and must always have a matched call to
156  * the ptimer's state, and completes the update of the ptimer. If the
165  * @period: period of the counter in nanoseconds
185  * representation of the Clock period was converted to either a period
204  * need to call one of them. If the counter behaviour is specified
207  * precise to fractions of a nanosecond, avoiding rounding errors.
215  * ptimer_get_limit - Get the configured limit of the ptimer
219  * of the down-counter; that is, the value which it will be
230  * ptimer_set_limit - Set the limit of the ptimer
235  * Set the limit value of the down-counter. The @reload flag can
236  * be used to emulate the behaviour of timers which immediately
245  * ptimer_get_count - Get the current value of the ptimer
248  * Return the current value of the down-counter. This will
255  * ptimer_set_count - Set the current value of the ptimer
259  * Set the value of the down-counter. If the counter is currently