EdkCompatibilityPkg/Foundation/Include/IndustryStandard/HighPrecisionEventTimerTable.h

   1 /*++
   2
   3 Copyright (c) 2007, Intel Corporation
   4 All rights reserved. This program and the accompanying materials
   5 are licensed and made available under the terms and conditions of the BSD License
   6 which accompanies this distribution.  The full text of the license may be found at
   7 http://opensource.org/licenses/bsd-license.php
   8
   9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11
  12 Module Name:
  13
  14   HighPrecisionEventTimerTable.h
  15
  16 Abstract:
  17
  18   ACPI high precision event timer table definition, defined at
  19   Intel IA-PC HPET (High Precision Event Timers) Specification.
  20
  21 --*/
  22
  23 #ifndef _HIGH_PRECISION_EVENT_TIMER_TABLE_H_
  24 #define _HIGH_PRECISION_EVENT_TIMER_TABLE_H_
  25
  26 //
  27 // Include files
  28 //
  29 #include "Acpi2_0.h"
  30
  31 //
  32 // Ensure proper structure formats
  33 //
  34 #pragma pack(1)
  35 //
  36 // High Precision Event Timer Table header definition.
  37 //
  38 typedef struct {
  39   EFI_ACPI_DESCRIPTION_HEADER             Header;
  40   UINT32                                  EventTimerBlockId;
  41   EFI_ACPI_2_0_GENERIC_ADDRESS_STRUCTURE  BaseAddressLower32Bit;
  42   UINT8                                   HpetNumber;
  43   UINT16                                  MainCounterMinimumClockTickInPeriodicMode;
  44   UINT8                                   PageProtectionAndOemAttribute;
  45 } EFI_ACPI_HIGH_PRECISION_EVENT_TIMER_TABLE_HEADER;
  46
  47 //
  48 // HPET Revision (defined in spec)
  49 //
  50 #define EFI_ACPI_HIGH_PRECISION_EVENT_TIMER_TABLE_REVISION  0x01
  51
  52 //
  53 // Page protection setting
  54 // Values 3 through 15 are reserved for use by the specification
  55 //
  56 #define EFI_ACPI_NO_PAGE_PROTECTION   0
  57 #define EFI_ACPI_4KB_PAGE_PROTECTION  1
  58 #define EFI_ACPI_64KB_PAGE_PROTECTION 2
  59
  60 #pragma pack()
  61
  62 #endif