47 lines
1.3 KiB
C#
47 lines
1.3 KiB
C#
|
///////////////////////////////////////////////////////////////////////////////
|
||
|
|
//
|
||
|
|
// Microsoft Research Singularity
|
||
|
|
//
|
||
|
|
// Copyright (c) Microsoft Corporation. All rights reserved.
|
||
|
|
//
|
||
|
|
// File: Ssdt.cs
|
||
|
|
//
|
||
|
|
|
||
|
|
namespace Microsoft.Singularity.Hal.Acpi
|
||
|
|
{
|
||
|
|
using System;
|
||
|
|
using Microsoft.Singularity.Io;
|
||
|
|
|
||
|
|
public class Ssdt
|
||
|
|
{
|
||
|
|
public const string Signature = "SSDT";
|
||
|
|
|
||
|
|
private IoMemory region;
|
||
|
|
private SystemTableHeader header;
|
||
|
|
|
||
|
|
public Ssdt(IoMemory region, SystemTableHeader header)
|
||
|
|
{
|
||
|
|
this.region = region;
|
||
|
|
this.header = header;
|
||
|
|
}
|
||
|
|
|
||
|
|
public IoMemory Region
|
||
|
|
{
|
||
|
|
get { return region; }
|
||
|
|
}
|
||
|
|
|
||
|
|
public static Ssdt Create(SystemTableHeader header)
|
||
|
|
{
|
||
|
|
IoMemory region = IoMemory.MapPhysicalMemory(header.PostHeaderAddress,
|
||
|
|
header.PostHeaderLength,
|
||
|
|
true, false);
|
||
|
|
int sum = (header.Checksum + AcpiChecksum.Compute(region)) & 0xff;
|
||
|
|
if (sum != 0)
|
||
|
|
{
|
||
|
|
return null;
|
||
|
|
}
|
||
|
|
return new Ssdt(region, header);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|