Vlv2DeviceRefCodePkg/AcpiTablesPCAT/Hpet/Hpet.aslc

/*++

Copyright (c)  1999  - 2014, Intel Corporation. All rights reserved

  This program and the accompanying materials are licensed and made available under
  the terms and conditions of the BSD License that accompanies this distribution.
  The full text of the license may be found at
  http://opensource.org/licenses/bsd-license.php.

  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.



Module Name:

  Hpet.c

Abstract:

  This file contains a structure definition for the ACPI HPET Table.
--*/

//
// Statements that include other files
//
#ifdef ECP_FLAG
#include <Tiano.h>
#endif
#include <Hpet.h>
#include "AcpiTablePlatform.h"

// Hpet Table
EFI_ACPI_HIGH_PRECISION_EVENT_TIMER_TABLE_HEADER HPET = {
  {
    EFI_ACPI_3_0_HIGH_PRECISION_EVENT_TIMER_TABLE_SIGNATURE,
    sizeof (EFI_ACPI_HIGH_PRECISION_EVENT_TIMER_TABLE_HEADER),
    EFI_ACPI_HIGH_PRECISION_EVENT_TIMER_TABLE_REVISION,
    0,                          // to make sum of entire table == 0
    EFI_ACPI_OEM_ID,            // OEMID is a 6 bytes long field
    EFI_ACPI_OEM_TABLE_ID,      // OEM table identification(8 bytes long)
    EFI_ACPI_OEM_REVISION,      // OEM revision
    EFI_ACPI_CREATOR_ID,        // ASL compiler vendor ID
    EFI_ACPI_CREATOR_REVISION   // ASL compiler revision number
  },
  0x0,                          // EventTimerBlockId
  {
    0x00,                     // Address_Space_ID = System Memory
    0x40,                     // Register_Bit_Width = 32 bits, mentioned about write failures when in 64bit in SCU HAS
    0x00,                     // Register_Bit_offset
    0x00,                     // Dword access
    HPET_BASE_ADDRESS,        // Base addresse of HPET
  },
  0x0,                          // Only HPET's _UID in Namespace
  MAIN_COUNTER_MIN_PERIODIC_CLOCK_TICKS,
  0x0
};

VOID*
ReferenceAcpiTable (
  VOID
  )
{
  //
  // Reference the table being generated to prevent the optimizer from
  // removing the data structure from the executable
  //
  return (VOID*)&HPET;
}