98 lines
2.3 KiB
C#
98 lines
2.3 KiB
C#
///////////////////////////////////////////////////////////////////////////////
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//
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// Microsoft Research Singularity
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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// File: SystemTableHeader.cs
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//
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// Note:
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// Page 90 of ACPI 3.0 Spec.
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namespace Microsoft.Singularity.Hal.Acpi
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{
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using System;
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using Microsoft.Singularity.Io;
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public class SystemTableHeader
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{
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public const uint Length = 36;
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private IoMemory region;
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public SystemTableHeader(IoMemory region)
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{
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this.region = region;
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}
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// Returns a PHYSICAL address
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public UIntPtr Address
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{
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get { return region.PhysicalAddress.Value; }
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}
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public string Signature
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{
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get { return region.ReadAsciiZeroString(0, 4); }
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}
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public uint FullTableLength
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{
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get { return region.Read32(4); }
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}
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public uint PostHeaderLength
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{
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get { return FullTableLength - Length; }
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}
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// Returns a PHYSICAL address
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public UIntPtr PostHeaderAddress
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{
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get { return new UIntPtr ((uint)region.PhysicalAddress.Value + Length); }
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}
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public byte Checksum
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{
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get { return AcpiChecksum.Compute(region); }
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}
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public byte Revision
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{
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get { return region.Read8(8); }
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}
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public string OemId
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{
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get { return region.ReadAsciiZeroString(10, 16); }
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}
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public string OemTableId
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{
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get { return region.ReadAsciiZeroString(16, 24); }
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}
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public uint OemRevision
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{
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get { return region.Read32(24); }
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}
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public uint CreatorId
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{
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get { return region.Read32(28); }
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}
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public uint CreatorRevision
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{
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get { return region.Read32(32); }
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}
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public static SystemTableHeader Create(uint address)
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{
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return new SystemTableHeader(
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IoMemory.MapPhysicalMemory(new UIntPtr(address), Length, true, false)
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);
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}
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}
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}
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