Include/Protocol/Timer.h

6   Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
7   SPDX-License-Identifier: BSD-2-Clause-Patent
26   This function of this type is called when a timer interrupt fires.  This
28   of this type to be called for the timer interrupt, so it can know how much
29   time has passed.  This information is used to signal timer based events.
31   @param  Time   Time since the last timer interrupt in 100 ns units. This will
32                  typically be TimerPeriod, but if a timer interrupt is missed, and the
34                  will contain the actual amount of time since the last interrupt.
47   the timer interrupt fires.  It also passes the amount of time since the last
50   returned.  If the CPU does not support registering a timer interrupt handler,
55   register the NotifyFunction with the timer interrupt, then EFI_DEVICE_ERROR
59   @param  NotifyFunction   The function to call when a timer interrupt fires. This
61                            register a handler for the timer interrupt, so it can know
63                            signal timer based events. NULL will unregister the handler.
88   EFI_DEVICE_ERROR is returned.  If TimerPeriod is 0, then the timer interrupt
91   interrupt controller so that a CPU interrupt is not generated when the timer
92   interrupt fires.
95   @param  TimerPeriod      The rate to program the timer interrupt in 100 nS units. If
103   @retval EFI_UNSUPPORTED       The platform cannot change the period of the timer interrupt.
136   This function generates a soft timer interrupt. If the platform does not support soft
139   service, then a soft timer interrupt will be generated. If the timer interrupt is
141   registered handler should not be able to distinguish a hardware-generated timer
142   interrupt from a software-generated timer interrupt.
146   @retval EFI_SUCCESS           The soft timer interrupt was generated.
158 /// interrupt, and to register a handler that is called each time the timer
159 /// interrupt fires.  It may also provide a service to adjust the rate of the
160 /// periodic timer interrupt.  When a timer interrupt occurs, the handler is
162 /// interrupt.