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/** @file
HPET policy.
Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which 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.
**/
#ifndef _HPET_CONFIG_H_
#define _HPET_CONFIG_H_
#define HPET_CONFIG_REVISION 1
extern EFI_GUID gHpetConfigGuid;
#pragma pack (push,1)
/**
The SC_HPET_CONFIG block passes the bus/device/function value for HPET.
The address resource range of HPET must be reserved in E820 and ACPI as
system resource.
**/
typedef struct {
CONFIG_BLOCK_HEADER Header; ///< Config Block Header
/**
Determines if enable HPET timer. 0: Disable; <b>1: Enable</b>.
The HPET timer address decode is always enabled.
This policy is used to configure the HPET timer count, and also the _STA of HPET device in ACPI.
While enabled, the HPET timer is started, else the HPET timer is halted.
**/
UINT32 Enable : 1; ///< Determines if enable HPET function
UINT32 BdfValid : 1; ///< Whether the BDF value is valid. <b>0: Disable</b>; 1: Enable.
UINT32 RsvdBits0 : 6; ///< Reserved bits
UINT32 BusNumber : 8; ///< Bus Number HPETn used as Requestor / Completer ID. Default is <b>0xFA</b>.
UINT32 DeviceNumber : 5; ///< Device Number HPETn used as Requestor / Completer ID. Default is <b>0x1F</b>.
UINT32 FunctionNumber : 3; ///< Function Number HPETn used as Requestor / Completer ID. Default is <b>0x00</b>.
UINT32 RsvdBits1 : 8; ///< Reserved bits
UINT32 Base; ///< The HPET base address. Default is <b>0xFED00000</b>.
} SC_HPET_CONFIG;
#pragma pack (pop)
#endif // _HPET_CONFIG_H_
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