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 } 70
