Vlv2DeviceRefCodePkg/AcpiTablesPCAT/Hpet/Hpet.aslc

   1 /*++
   2
   3 Copyright (c)  1999  - 2014, Intel Corporation. All rights reserved
   4
   5   This program and the accompanying materials are licensed and made available under
   6   the terms and conditions of the BSD License that accompanies this distribution.
   7   The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php.
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13
  14
  15 Module Name:
  16
  17   Hpet.c
  18
  19 Abstract:
  20
  21   This file contains a structure definition for the ACPI HPET Table.
  22 --*/
  23
  24 //
  25 // Statements that include other files
  26 //
  27 #ifdef ECP_FLAG
  28 #include <Tiano.h>
  29 #endif
  30 #include <Hpet.h>
  31 #include "AcpiTablePlatform.h"
  32
  33 // Hpet Table
  34 EFI_ACPI_HIGH_PRECISION_EVENT_TIMER_TABLE_HEADER HPET = {
  35   {
  36     EFI_ACPI_3_0_HIGH_PRECISION_EVENT_TIMER_TABLE_SIGNATURE,
  37     sizeof (EFI_ACPI_HIGH_PRECISION_EVENT_TIMER_TABLE_HEADER),
  38     EFI_ACPI_HIGH_PRECISION_EVENT_TIMER_TABLE_REVISION,
  39     0,                          // to make sum of entire table == 0
  40     EFI_ACPI_OEM_ID,            // OEMID is a 6 bytes long field
  41     EFI_ACPI_OEM_TABLE_ID,      // OEM table identification(8 bytes long)
  42     EFI_ACPI_OEM_REVISION,      // OEM revision
  43     EFI_ACPI_CREATOR_ID,        // ASL compiler vendor ID
  44     EFI_ACPI_CREATOR_REVISION   // ASL compiler revision number
  45   },
  46   0x0,                          // EventTimerBlockId
  47   {
  48     0x00,                     // Address_Space_ID = System Memory
  49     0x40,                     // Register_Bit_Width = 32 bits, mentioned about write failures when in 64bit in SCU HAS
  50     0x00,                     // Register_Bit_offset
  51     0x00,                     // Dword access
  52     HPET_BASE_ADDRESS,        // Base addresse of HPET
  53   },
  54   0x0,                          // Only HPET's _UID in Namespace
  55   MAIN_COUNTER_MIN_PERIODIC_CLOCK_TICKS,
  56   0x0
  57 };
  58
  59 VOID*
  60 ReferenceAcpiTable (
  61   VOID
  62   )
  63 {
  64   //
  65   // Reference the table being generated to prevent the optimizer from
  66   // removing the data structure from the executable
  67   //
  68   return (VOID*)&HPET;
  69 }