32610f38e1
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@7689 6f19259b-4bc3-4df7-8a09-765794883524
58 lines
2.2 KiB
C
58 lines
2.2 KiB
C
/** @file
|
|
Include file of Metronome driver.
|
|
|
|
Copyright (c) 2008, Intel Corporation. <BR>
|
|
All rights reserved. This program and the accompanying materials
|
|
are licensed and made available under the terms and conditions of the BSD License
|
|
which accompanies this distribution. The full text of the license may be found at
|
|
http://opensource.org/licenses/bsd-license.php
|
|
|
|
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
|
|
|
|
**/
|
|
|
|
#ifndef _METRONOME_H_
|
|
#define _METRONOME_H_
|
|
|
|
#include <PiDxe.h>
|
|
#include <Protocol/Metronome.h>
|
|
#include <Library/UefiBootServicesTableLib.h>
|
|
#include <Library/TimerLib.h>
|
|
#include <Library/DebugLib.h>
|
|
#include <Library/UefiDriverEntryPoint.h>
|
|
|
|
/**
|
|
Waits for the specified number of ticks.
|
|
|
|
This function implements EFI_METRONOME_ARCH_PROTOCOL.WaitForTick().
|
|
The WaitForTick() function waits for the number of ticks specified by
|
|
TickNumber from a known time source in the platform. If TickNumber of
|
|
ticks are detected, then EFI_SUCCESS is returned. The actual time passed
|
|
between entry of this function and the first tick is between 0 and
|
|
TickPeriod 100 nS units. If you want to guarantee that at least TickPeriod
|
|
time has elapsed, wait for two ticks. This function waits for a hardware
|
|
event to determine when a tick occurs. It is possible for interrupt
|
|
processing, or exception processing to interrupt the execution of the
|
|
WaitForTick() function. Depending on the hardware source for the ticks, it
|
|
is possible for a tick to be missed. This function cannot guarantee that
|
|
ticks will not be missed. If a timeout occurs waiting for the specified
|
|
number of ticks, then EFI_TIMEOUT is returned.
|
|
|
|
@param This The EFI_METRONOME_ARCH_PROTOCOL instance.
|
|
@param TickNumber Number of ticks to wait.
|
|
|
|
@retval EFI_SUCCESS The wait for the number of ticks specified by TickNumber
|
|
succeeded.
|
|
@retval EFI_TIMEOUT A timeout occurred waiting for the specified number of ticks.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
WaitForTick (
|
|
IN EFI_METRONOME_ARCH_PROTOCOL *This,
|
|
IN UINT32 TickNumber
|
|
);
|
|
|
|
#endif
|