c1589a2c24
TscTimerLib is a sample implementation that depends on chipset ACPI timer. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Liming Gao <liming.gao@intel.com> Reviewed-by: Star Zeng <star.zeng@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16457 6f19259b-4bc3-4df7-8a09-765794883524
60 lines
2.0 KiB
INI
60 lines
2.0 KiB
INI
## @file
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# Base Timer Library which uses the Time Stamp Counter in the processor.
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#
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# Note: There will be 1ms penalty to get TSC frequency every time
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# by waiting for 3579 clocks of the ACPI timer, or 1ms.
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#
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# Note: This library is a sample implementation that depends on chipset ACPI timer.
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# It may not work on new generation chipset. PcAtChipsetPkg AcpiTimerLib is
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# the generic timer library that can replace this one.
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#
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# A version of the Timer Library using the processor's TSC.
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# The time stamp counter in newer processors may support an enhancement, referred to as invariant TSC.
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# The invariant TSC runs at a constant rate in all ACPI P-, C-. and T-states.
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# This is the architectural behavior moving forward.
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# TSC reads are much more efficient and do not incur the overhead associated with a ring transition or
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# access to a platform resource.
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#
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# Copyright (c) 2009 - 2014, Intel Corporation. All rights reserved.<BR>
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# This program and the accompanying materials
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# are licensed and made available under the terms and conditions of the BSD License
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# which accompanies this distribution. The full text of the license may be found at
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# http://opensource.org/licenses/bsd-license.php
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# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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#
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##
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[Defines]
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INF_VERSION = 0x00010005
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BASE_NAME = BaseTscTimerLib
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FILE_GUID = D29338B9-50FE-4e4f-B7D4-A150A2C1F4FB
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MODULE_TYPE = BASE
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VERSION_STRING = 1.0
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LIBRARY_CLASS = TimerLib
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#
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# VALID_ARCHITECTURES = IA32 X64
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#
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[Sources.common]
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TscTimerLibShare.c
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BaseTscTimerLib.c
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TscTimerLibInternal.h
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[Packages]
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MdePkg/MdePkg.dec
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PerformancePkg/PerformancePkg.dec
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[LibraryClasses]
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PcdLib
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PciLib
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IoLib
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BaseLib
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[Pcd.common]
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gPerformancePkgTokenSpaceGuid.PcdPerfPkgAcpiIoPortBaseAddress
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