1## @file 2# Pei Timer Library which uses the Time Stamp Counter in the processor. 3# 4# Note: This library is a sample implementation that depends on chipset ACPI timer. 5# It may not work on new generation chipset. PcAtChipsetPkg AcpiTimerLib is 6# the generic timer library that can replace this one. 7# 8# A version of the Timer Library using the processor's TSC. 9# The time stamp counter in newer processors may support an enhancement, referred to as invariant TSC. 10# The invariant TSC runs at a constant rate in all ACPI P-, C-. and T-states. 11# This is the architectural behavior moving forward. 12# TSC reads are much more efficient and do not incur the overhead associated with a ring transition or 13# access to a platform resource. 14# 15# Copyright (c) 2009 - 2015, Intel Corporation. All rights reserved.<BR> 16# This program and the accompanying materials 17# are licensed and made available under the terms and conditions of the BSD License 18# which accompanies this distribution. The full text of the license may be found at 19# http://opensource.org/licenses/bsd-license.php 20# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 21# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 22# 23## 24 25[Defines] 26 INF_VERSION = 0x00010005 27 BASE_NAME = PeiTscTimerLib 28 FILE_GUID = 342C36C0-15DF-43b4-9EC9-FBF748BFB3D1 29 MODULE_TYPE = PEIM 30 VERSION_STRING = 1.0 31 LIBRARY_CLASS = TimerLib|PEIM PEI_CORE 32 33 34# 35# VALID_ARCHITECTURES = IA32 X64 36# 37 38[Sources.common] 39 TscTimerLibShare.c 40 PeiTscTimerLib.c 41 TscTimerLibInternal.h 42 43 44[Packages] 45 MdePkg/MdePkg.dec 46 PerformancePkg/PerformancePkg.dec 47 48 49[LibraryClasses] 50 PcdLib 51 PciLib 52 IoLib 53 BaseLib 54 HobLib 55 56[Guids] 57 gEfiTscFrequencyGuid ## PRODUCES ## HOB 58 59[Pcd.common] 60 gPerformancePkgTokenSpaceGuid.PcdPerfPkgAcpiIoPortBaseAddress ## SOMETIMES_CONSUMES 61