BaseRomAcpiTimerLib.c File Reference

#include <Library/DebugLib.h>
#include <Library/IoLib.h>
#include <Library/PciLib.h>
#include <OvmfPlatforms.h>

Go to the source code of this file.

Functions
RETURN_STATUS EFIAPI	AcpiTimerLibConstructor (VOID)
UINT32	InternalAcpiGetTimerTick (VOID)

Detailed Description

Provide constructor and GetTick for BaseRom instance of ACPI Timer Library

Copyright (c) 2008 - 2012, Intel Corporation. All rights reserved. Copyright (c) 2011, Andrei Warkentin andre.nosp@m.iw@m.nosp@m.otoro.nosp@m.la.c.nosp@m.om

SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file BaseRomAcpiTimerLib.c.

Function Documentation

AcpiTimerLibConstructor()

RETURN_STATUS EFIAPI AcpiTimerLibConstructor

(

VOID

)

The constructor function enables ACPI IO space.

If ACPI I/O space not enabled, this function will enable it. It will always return RETURN_SUCCESS.

Return values

EFI_SUCCESS

The constructor always returns RETURN_SUCCESS.

Definition at line 26 of file BaseRomAcpiTimerLib.c.

InternalAcpiGetTimerTick()

UINT32 InternalAcpiGetTimerTick

(

VOID

)

Internal function to read the current tick counter of ACPI.

Dynamically compute the address of the ACPI tick counter based on the properties of the underlying platform, to avoid relying on global variables.

Returns

The tick counter read.

Definition at line 98 of file BaseRomAcpiTimerLib.c.