/** @file
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HPET policy
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Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#ifndef _HPET_CONFIG_H_
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#define _HPET_CONFIG_H_
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#define HPET_PREMEM_CONFIG_REVISION 1
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extern EFI_GUID gHpetPreMemConfigGuid;
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#pragma pack (push,1)
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/**
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The PCH_HPET_CONFIG block passes the bus/device/function value for HPET.
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The address resource range of HPET must be reserved in E820 and ACPI as
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system resource.
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**/
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typedef struct {
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CONFIG_BLOCK_HEADER Header; ///< Config Block Header
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/**
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Determines if enable HPET timer. 0: Disable; <b>1: Enable</b>.
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The HPET timer address decode is always enabled.
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This policy is used to configure the HPET timer count, and also the _STA of HPET device in ACPI.
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While enabled, the HPET timer is started, else the HPET timer is halted.
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**/
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UINT32 Enable : 1;
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UINT32 BdfValid : 1; ///< Whether the BDF value is valid. <b>0: Disable</b>; 1: Enable.
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UINT32 RsvdBits0 : 6; ///< Reserved bits
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UINT32 BusNumber : 8; ///< Bus Number HPETn used as Requestor / Completer ID. Default is <b>0xF0</b>.
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UINT32 DeviceNumber : 5; ///< Device Number HPETn used as Requestor / Completer ID. Default is <b>0x1F</b>.
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UINT32 FunctionNumber : 3; ///< Function Number HPETn used as Requestor / Completer ID. Default is <b>0x00</b>.
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UINT32 RsvdBits1 : 8; ///< Reserved bits
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UINT32 Base; ///< The HPET base address. Default is <b>0xFED00000</b>.
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} PCH_HPET_PREMEM_CONFIG;
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#pragma pack (pop)
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#endif // _HPET_CONFIG_H_
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