b3b58d4da7
Clear bits [31:24] after reading ACPI timer count by IoRead32(), and also add comments "Note: The implementation uses the lower 24-bits of the ACPI timer and is compatible with both 24-bit and 32-bit ACPI timers." in INF. Cc: Michael Kinney <michael.d.kinney@intel.com> Cc: Jiewen Yao <jiewen.yao@intel.com> Cc: Liming Gao <liming.gao@intel.com> Cc: Laszlo Ersek <lersek@redhat.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Star Zeng <star.zeng@intel.com> Reviewed-by: Michael Kinney <michael.d.kinney@intel.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com>
55 lines
2.2 KiB
INI
55 lines
2.2 KiB
INI
## @file
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# Base ACPI Timer Library
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#
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# Provides basic timer support using the ACPI timer hardware. The performance
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# counter features are provided by the processors time stamp counter.
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#
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# Note: The implementation uses the lower 24-bits of the ACPI timer and
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# is compatible with both 24-bit and 32-bit ACPI timers.
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#
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# Copyright (c) 2013 - 2016, 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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#
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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 = BaseAcpiTimerLib
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FILE_GUID = 564DE85F-049E-4481-BF7A-CA04D2788CF9
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MODULE_TYPE = BASE
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VERSION_STRING = 1.0
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LIBRARY_CLASS = TimerLib|SEC PEI_CORE PEIM
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CONSTRUCTOR = AcpiTimerLibConstructor
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MODULE_UNI_FILE = BaseAcpiTimerLib.uni
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[Sources]
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AcpiTimerLib.c
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BaseAcpiTimerLib.c
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[Packages]
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MdePkg/MdePkg.dec
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PcAtChipsetPkg/PcAtChipsetPkg.dec
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[LibraryClasses]
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BaseLib
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PcdLib
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PciLib
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IoLib
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DebugLib
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[Pcd]
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gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiIoPciBusNumber ## CONSUMES
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gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiIoPciDeviceNumber ## CONSUMES
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gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiIoPciFunctionNumber ## CONSUMES
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gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiIoPciEnableRegisterOffset ## CONSUMES
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gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiIoBarEnableMask ## CONSUMES
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gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiIoPciBarRegisterOffset ## CONSUMES
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gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiIoPortBaseAddress ## CONSUMES
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gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiPm1TmrOffset ## CONSUMES
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gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiIoPortBaseAddressMask ## CONSUMES |