118 lines
3.5 KiB
C#
118 lines
3.5 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: IoPortRange.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 IoPortRange : IoRange
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{
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private readonly ushort port;
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private readonly ushort size;
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private readonly bool readable;
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private readonly bool writable;
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#if SINGULARITY_KERNEL
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public IoPortRange(ushort port, ushort size, Access access)
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#elif SINGULARITY_PROCESS
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internal IoPortRange(ushort port, ushort size, Access access)
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#endif // SINGULARITY_PROCESS
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{
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this.port = port;
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this.size = size;
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this.readable = (access & Access.Read) != 0;
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this.writable = (access & Access.Write) != 0;
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}
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#if SINGULARITY_KERNEL
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public IoPortRange(ushort port, ushort size, bool readable, bool writable)
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#elif SINGULARITY_PROCESS
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internal IoPortRange(ushort port, ushort size, bool readable, bool writable)
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#endif // SINGULARITY_PROCESS
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{
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this.port = port;
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this.size = size;
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this.readable = readable;
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this.writable = writable;
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}
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public IoPortRange RangeAtOffset(ushort offset, ushort bytes,
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bool readable, bool writeable)
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{
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#if !DONT_CHECK_IO_BOUNDS
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if (offset + bytes > size) {
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throw new OverflowException("PortAtOffset out of range.");
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}
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if ((readable && !this.readable) || (writable && !this.writable)) {
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throw new OverflowException("PortAtOffset invalid access");
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}
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#endif
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return new IoPortRange((ushort)(port + offset), bytes, readable, writable);
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}
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public IoPort PortAtOffset(ushort offset, ushort bytes, Access access)
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{
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return PortAtOffset(offset,
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bytes,
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(access & Access.Read) != 0,
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(access & Access.Write) != 0);
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}
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public IoPort PortAtOffset(ushort offset, ushort bytes, bool readable, bool writable)
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{
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#if !DONT_CHECK_IO_BOUNDS
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if (offset + bytes > size) {
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throw new OverflowException("PortAtOffset out of range.");
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}
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if ((readable && !this.readable) || (writable && !this.writable)) {
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throw new OverflowException("PortAtOffset invalid access");
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}
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#endif
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return new IoPort((ushort)(port + offset), bytes, readable, writable);
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}
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public ushort Port
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{
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get { return port; }
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}
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public ushort Size
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{
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get { return size; }
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}
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public bool Readable
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{
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get { return readable; }
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}
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public bool Writable
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{
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get { return writable; }
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}
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public override string ToString()
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{
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return String.Format("IO:{0,4:x4}[{1:x}]{2}{3}", port, size,
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readable ? "r" : "", writable ? "w" : "");
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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)port; }
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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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