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/* -------------------------------------------
Copyright (C) 2024-2025, Amlal EL Mahrouss, all rights reserved.
File: HPET.h
Purpose: HPET builtin.
Revision History:
------------------------------------------- */
#pragma once
#include <NewKit/Defines.h>
#include <modules/ACPI/ACPI.h>
namespace NeOS
{
struct PACKED HPETAddressStructure final
{
NeOS::UInt8 AddressSpaceId; // 0 - system memory, 1 - system I/O
NeOS::UInt8 RegisterBitWidth;
NeOS::UInt8 RegisterBitOffset;
NeOS::UInt8 Reserved;
NeOS::UInt64 Address;
};
struct PACKED HPETHeader final : public SDT
{
NeOS::UInt8 HardwareRevId;
NeOS::UInt8 ComparatorCount : 5;
NeOS::UInt8 CounterSize : 1;
NeOS::UInt8 Reserved : 1;
NeOS::UInt8 LegacyReplacement : 1;
NeOS::UInt16 PciVendorId;
HPETAddressStructure Address;
NeOS::UInt8 HpetNumber;
NeOS::UInt16 MinimumTick;
NeOS::UInt8 PageProtection;
};
} // namespace NeOS
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