102 lines
3.0 KiB
C#
102 lines
3.0 KiB
C#
// Mozilla Public License 2.0
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// If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
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// Copyright (C) LibreHardwareMonitor and Contributors
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// All Rights Reserved
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namespace LibreHardwareMonitor.Hardware.Motherboard.Lpc
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{
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internal class LpcPort
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{
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public LpcPort(ushort registerPort, ushort valuePort)
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{
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RegisterPort = registerPort;
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ValuePort = valuePort;
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}
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public ushort RegisterPort { get; }
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public ushort ValuePort { get; }
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public byte ReadByte(byte register)
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{
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Ring0.WriteIoPort(RegisterPort, register);
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return Ring0.ReadIoPort(ValuePort);
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}
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public void WriteByte(byte register, byte value)
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{
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Ring0.WriteIoPort(RegisterPort, register);
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Ring0.WriteIoPort(ValuePort, value);
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}
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public ushort ReadWord(byte register)
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{
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return (ushort)((ReadByte(register) << 8) |
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ReadByte((byte)(register + 1)));
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}
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public void Select(byte logicalDeviceNumber)
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{
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Ring0.WriteIoPort(RegisterPort, DEVCIE_SELECT_REGISTER);
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Ring0.WriteIoPort(ValuePort, logicalDeviceNumber);
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}
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public void WinbondNuvotonFintekEnter()
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{
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Ring0.WriteIoPort(RegisterPort, 0x87);
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Ring0.WriteIoPort(RegisterPort, 0x87);
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}
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public void WinbondNuvotonFintekExit()
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{
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Ring0.WriteIoPort(RegisterPort, 0xAA);
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}
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public void NuvotonDisableIOSpaceLock()
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{
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byte options = ReadByte(NUVOTON_HARDWARE_MONITOR_IO_SPACE_LOCK);
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// if the i/o space lock is enabled
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if ((options & 0x10) > 0)
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{
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// disable the i/o space lock
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WriteByte(NUVOTON_HARDWARE_MONITOR_IO_SPACE_LOCK, (byte)(options & ~0x10));
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}
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}
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public void IT87Enter()
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{
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Ring0.WriteIoPort(RegisterPort, 0x87);
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Ring0.WriteIoPort(RegisterPort, 0x01);
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Ring0.WriteIoPort(RegisterPort, 0x55);
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Ring0.WriteIoPort(RegisterPort, RegisterPort == 0x4E ? (byte)0xAA : (byte)0x55);
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}
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public void IT87Exit()
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{
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// Do not exit config mode for secondary super IO.
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if (RegisterPort != 0x4E)
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{
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Ring0.WriteIoPort(RegisterPort, CONFIGURATION_CONTROL_REGISTER);
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Ring0.WriteIoPort(ValuePort, 0x02);
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}
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}
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public void SmscEnter()
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{
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Ring0.WriteIoPort(RegisterPort, 0x55);
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}
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public void SmscExit()
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{
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Ring0.WriteIoPort(RegisterPort, 0xAA);
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}
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// ReSharper disable InconsistentNaming
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private const byte CONFIGURATION_CONTROL_REGISTER = 0x02;
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private const byte DEVCIE_SELECT_REGISTER = 0x07;
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private const byte NUVOTON_HARDWARE_MONITOR_IO_SPACE_LOCK = 0x28;
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// ReSharper restore InconsistentNaming
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}
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}
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