mirror of https://github.com/acidanthera/audk.git
54 lines
1.9 KiB
C
54 lines
1.9 KiB
C
/** @file
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ACPI high precision event timer table definition, defined at
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ftp://download.intel.com/labs/platcomp/hpet/download/hpetspec098a.pdf.
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Specification name is IA-PC HPET (High Precision Event Timers) Specification.
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Copyright (c) 2007, Intel Corporation
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All rights reserved. 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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#ifndef _HIGH_PRECISION_EVENT_TIMER_TABLE_H_
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#define _HIGH_PRECISION_EVENT_TIMER_TABLE_H_
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#include <IndustryStandard/Acpi.h>
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//
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// Ensure proper structure formats
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//
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#pragma pack(1)
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///
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/// High Precision Event Timer Table header definition.
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///
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typedef struct {
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EFI_ACPI_DESCRIPTION_HEADER Header;
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UINT32 EventTimerBlockId;
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EFI_ACPI_2_0_GENERIC_ADDRESS_STRUCTURE BaseAddressLower32Bit;
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UINT8 HpetNumber;
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UINT16 MainCounterMinimumClockTickInPeriodicMode;
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UINT8 PageProtectionAndOemAttribute;
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} EFI_ACPI_HIGH_PRECISION_EVENT_TIMER_TABLE_HEADER;
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///
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/// HPET Revision (defined in spec)
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///
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#define EFI_ACPI_HIGH_PRECISION_EVENT_TIMER_TABLE_REVISION 0x01
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//
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// Page protection setting
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// Values 3 through 15 are reserved for use by the specification
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//
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#define EFI_ACPI_NO_PAGE_PROTECTION 0
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#define EFI_ACPI_4KB_PAGE_PROTECTION 1
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#define EFI_ACPI_64KB_PAGE_PROTECTION 2
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#pragma pack()
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#endif
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