64 lines
1.5 KiB
C#
64 lines
1.5 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: IoDmaRange.cs
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//
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using System;
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namespace Microsoft.Singularity.Io
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{
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[CLSCompliant(false)]
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public sealed class IoDmaRange : IoRange
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{
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private readonly int dma;
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private readonly int size;
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#if SINGULARITY_KERNEL
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public IoDmaRange(int channel, int size)
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#elif SINGULARITY_PROCESS
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internal IoDmaRange(int channel, int size)
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#endif // SINGULARITY_PROCESS
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{
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this.dma = channel;
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this.size = size;
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}
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public IoDma DmaAtOffset(int offset)
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{
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#if !DONT_CHECK_IO_BOUNDS
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if (offset + 1 > size) {
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throw new OverflowException("DmaAtOffset out of range.");
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}
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#endif
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return new IoDma((byte)(dma + offset));
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}
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public byte Channel {
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get { return (byte)dma; }
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}
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public byte Size {
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get { return (byte)size; }
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}
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public override string ToString()
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{
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return String.Format("DMA:{0:x2}[{1:x}]", dma, size);
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}
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#if SINGULARITY_KERNEL
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public override uint RangeBase {
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get { return (uint)dma; }
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}
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public override uint RangeLength {
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get { return (uint)size; }
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}
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#endif
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}
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}
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