mirror of
https://github.com/Ryujinx/Ryujinx.git
synced 2024-07-02 07:49:34 +02:00
Refactor memory managers to a common base class, consolidate Read() method logic (#6360)
* - add new abstract class `VirtualMemoryManagerBase` - rename `MemoryManagerBase` to `VirtualMemoryManagerRefCountedBase` and derive from `VirtualMemoryManagerBase` - change `AddressSpaceManager`, `HvMemoryManager`, `MemoryManager`, and `MemoryManagerHostMapped` to implement abstract members and use the inherited `void VirtualMemoryManagerBase.Read(TVirtual va, Span<byte> data)` implementation. * move property `AddressSpaceSize` up by the other properties
This commit is contained in:
jhorv
GitHub
parent
3924bd1a43
commit
a3a63d4394
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@ -16,12 +16,8 @@ namespace Ryujinx.Cpu.AppleHv
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/// Represents a CPU memory manager which maps guest virtual memory directly onto the Hypervisor page table.
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/// </summary>
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[SupportedOSPlatform("macos")]
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public class HvMemoryManager : MemoryManagerBase, IMemoryManager, IVirtualMemoryManagerTracked, IWritableBlock
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public class HvMemoryManager : VirtualMemoryManagerRefCountedBase<ulong, ulong>, IMemoryManager, IVirtualMemoryManagerTracked, IWritableBlock
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{
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public const int PageBits = 12;
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public const int PageSize = 1 << PageBits;
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public const int PageMask = PageSize - 1;
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public const int PageToPteShift = 5; // 32 pages (2 bits each) in one ulong page table entry.
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public const ulong BlockMappedMask = 0x5555555555555555; // First bit of each table entry set.
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@ -39,8 +35,6 @@ namespace Ryujinx.Cpu.AppleHv
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private readonly InvalidAccessHandler _invalidAccessHandler;
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private readonly ulong _addressSpaceSize;
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private readonly HvAddressSpace _addressSpace;
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internal HvAddressSpace AddressSpace => _addressSpace;
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@ -62,6 +56,8 @@ namespace Ryujinx.Cpu.AppleHv
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public event Action<ulong, ulong> UnmapEvent;
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protected override ulong AddressSpaceSize { get; }
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/// <summary>
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/// Creates a new instance of the Hypervisor memory manager.
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/// </summary>
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@ -73,7 +69,7 @@ namespace Ryujinx.Cpu.AppleHv
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_backingMemory = backingMemory;
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_pageTable = new PageTable<ulong>();
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_invalidAccessHandler = invalidAccessHandler;
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_addressSpaceSize = addressSpaceSize;
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AddressSpaceSize = addressSpaceSize;
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ulong asSize = PageSize;
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int asBits = PageBits;
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@ -92,42 +88,6 @@ namespace Ryujinx.Cpu.AppleHv
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Tracking = new MemoryTracking(this, PageSize, invalidAccessHandler);
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}
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/// <summary>
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/// Checks if the virtual address is part of the addressable space.
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/// </summary>
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/// <param name="va">Virtual address</param>
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/// <returns>True if the virtual address is part of the addressable space</returns>
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private bool ValidateAddress(ulong va)
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{
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return va < _addressSpaceSize;
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}
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/// <summary>
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/// Checks if the combination of virtual address and size is part of the addressable space.
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/// </summary>
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/// <param name="va">Virtual address of the range</param>
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/// <param name="size">Size of the range in bytes</param>
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/// <returns>True if the combination of virtual address and size is part of the addressable space</returns>
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private bool ValidateAddressAndSize(ulong va, ulong size)
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{
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ulong endVa = va + size;
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return endVa >= va && endVa >= size && endVa <= _addressSpaceSize;
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}
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/// <summary>
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/// Ensures the combination of virtual address and size is part of the addressable space.
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/// </summary>
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/// <param name="va">Virtual address of the range</param>
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/// <param name="size">Size of the range in bytes</param>
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/// <exception cref="InvalidMemoryRegionException">Throw when the memory region specified outside the addressable space</exception>
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private void AssertValidAddressAndSize(ulong va, ulong size)
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{
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if (!ValidateAddressAndSize(va, size))
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{
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throw new InvalidMemoryRegionException($"va=0x{va:X16}, size=0x{size:X16}");
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}
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}
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/// <inheritdoc/>
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public void Map(ulong va, ulong pa, ulong size, MemoryMapFlags flags)
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{
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@ -209,9 +169,19 @@ namespace Ryujinx.Cpu.AppleHv
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}
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/// <inheritdoc/>
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public void Read(ulong va, Span<byte> data)
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public override void Read(ulong va, Span<byte> data)
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{
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ReadImpl(va, data);
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try
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{
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base.Read(va, data);
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}
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catch (InvalidMemoryRegionException)
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{
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if (_invalidAccessHandler == null || !_invalidAccessHandler(va))
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{
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throw;
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}
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}
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}
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/// <inheritdoc/>
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@ -340,7 +310,7 @@ namespace Ryujinx.Cpu.AppleHv
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{
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Span<byte> data = new byte[size];
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ReadImpl(va, data);
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base.Read(va, data);
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return data;
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}
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@ -367,7 +337,7 @@ namespace Ryujinx.Cpu.AppleHv
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{
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Memory<byte> memory = new byte[size];
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ReadImpl(va, memory.Span);
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base.Read(va, memory.Span);
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return new WritableRegion(this, va, memory);
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}
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@ -576,48 +546,6 @@ namespace Ryujinx.Cpu.AppleHv
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return regions;
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}
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private void ReadImpl(ulong va, Span<byte> data)
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{
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if (data.Length == 0)
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{
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return;
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}
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try
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{
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AssertValidAddressAndSize(va, (ulong)data.Length);
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int offset = 0, size;
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if ((va & PageMask) != 0)
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{
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ulong pa = GetPhysicalAddressChecked(va);
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size = Math.Min(data.Length, PageSize - (int)(va & PageMask));
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_backingMemory.GetSpan(pa, size).CopyTo(data[..size]);
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offset += size;
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}
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for (; offset < data.Length; offset += size)
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{
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ulong pa = GetPhysicalAddressChecked(va + (ulong)offset);
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size = Math.Min(data.Length - offset, PageSize);
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_backingMemory.GetSpan(pa, size).CopyTo(data.Slice(offset, size));
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}
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}
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catch (InvalidMemoryRegionException)
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{
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if (_invalidAccessHandler == null || !_invalidAccessHandler(va))
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{
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throw;
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}
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}
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}
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/// <inheritdoc/>
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/// <remarks>
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/// This function also validates that the given range is both valid and mapped, and will throw if it is not.
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@ -936,6 +864,10 @@ namespace Ryujinx.Cpu.AppleHv
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_addressSpace.Dispose();
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}
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private static void ThrowInvalidMemoryRegionException(string message) => throw new InvalidMemoryRegionException(message);
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protected override Span<byte> GetPhysicalAddressSpan(ulong pa, int size)
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=> _backingMemory.GetSpan(pa, size);
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protected override ulong TranslateVirtualAddressForRead(ulong va)
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=> GetPhysicalAddressChecked(va);
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}
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}
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@ -14,12 +14,8 @@ namespace Ryujinx.Cpu.Jit
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/// <summary>
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/// Represents a CPU memory manager.
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/// </summary>
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public sealed class MemoryManager : MemoryManagerBase, IMemoryManager, IVirtualMemoryManagerTracked, IWritableBlock
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public sealed class MemoryManager : VirtualMemoryManagerRefCountedBase<ulong, ulong>, IMemoryManager, IVirtualMemoryManagerTracked, IWritableBlock
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{
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public const int PageBits = 12;
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public const int PageSize = 1 << PageBits;
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public const int PageMask = PageSize - 1;
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private const int PteSize = 8;
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private const int PointerTagBit = 62;
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@ -35,8 +31,6 @@ namespace Ryujinx.Cpu.Jit
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/// </summary>
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public int AddressSpaceBits { get; }
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private readonly ulong _addressSpaceSize;
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private readonly MemoryBlock _pageTable;
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/// <summary>
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@ -50,6 +44,8 @@ namespace Ryujinx.Cpu.Jit
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public event Action<ulong, ulong> UnmapEvent;
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protected override ulong AddressSpaceSize { get; }
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/// <summary>
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/// Creates a new instance of the memory manager.
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/// </summary>
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@ -71,7 +67,7 @@ namespace Ryujinx.Cpu.Jit
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}
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AddressSpaceBits = asBits;
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_addressSpaceSize = asSize;
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AddressSpaceSize = asSize;
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_pageTable = new MemoryBlock((asSize / PageSize) * PteSize);
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Tracking = new MemoryTracking(this, PageSize);
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@ -153,9 +149,19 @@ namespace Ryujinx.Cpu.Jit
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}
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/// <inheritdoc/>
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public void Read(ulong va, Span<byte> data)
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public override void Read(ulong va, Span<byte> data)
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{
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ReadImpl(va, data);
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try
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{
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base.Read(va, data);
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}
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catch (InvalidMemoryRegionException)
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{
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if (_invalidAccessHandler == null || !_invalidAccessHandler(va))
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{
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throw;
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}
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}
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}
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/// <inheritdoc/>
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@ -290,7 +296,7 @@ namespace Ryujinx.Cpu.Jit
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{
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Span<byte> data = new byte[size];
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ReadImpl(va, data);
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base.Read(va, data);
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return data;
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}
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@ -462,48 +468,6 @@ namespace Ryujinx.Cpu.Jit
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return regions;
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}
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private void ReadImpl(ulong va, Span<byte> data)
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{
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if (data.Length == 0)
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{
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return;
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}
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try
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{
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AssertValidAddressAndSize(va, (ulong)data.Length);
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int offset = 0, size;
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if ((va & PageMask) != 0)
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{
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ulong pa = GetPhysicalAddressInternal(va);
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size = Math.Min(data.Length, PageSize - (int)(va & PageMask));
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_backingMemory.GetSpan(pa, size).CopyTo(data[..size]);
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offset += size;
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}
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for (; offset < data.Length; offset += size)
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{
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ulong pa = GetPhysicalAddressInternal(va + (ulong)offset);
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size = Math.Min(data.Length - offset, PageSize);
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_backingMemory.GetSpan(pa, size).CopyTo(data.Slice(offset, size));
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}
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}
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catch (InvalidMemoryRegionException)
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{
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if (_invalidAccessHandler == null || !_invalidAccessHandler(va))
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{
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throw;
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}
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}
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}
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/// <inheritdoc/>
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public bool IsRangeMapped(ulong va, ulong size)
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{
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@ -544,37 +508,6 @@ namespace Ryujinx.Cpu.Jit
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return _pageTable.Read<ulong>((va / PageSize) * PteSize) != 0;
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}
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private bool ValidateAddress(ulong va)
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{
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return va < _addressSpaceSize;
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}
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/// <summary>
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/// Checks if the combination of virtual address and size is part of the addressable space.
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/// </summary>
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/// <param name="va">Virtual address of the range</param>
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/// <param name="size">Size of the range in bytes</param>
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/// <returns>True if the combination of virtual address and size is part of the addressable space</returns>
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private bool ValidateAddressAndSize(ulong va, ulong size)
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{
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ulong endVa = va + size;
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return endVa >= va && endVa >= size && endVa <= _addressSpaceSize;
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}
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/// <summary>
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/// Ensures the combination of virtual address and size is part of the addressable space.
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/// </summary>
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/// <param name="va">Virtual address of the range</param>
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/// <param name="size">Size of the range in bytes</param>
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/// <exception cref="InvalidMemoryRegionException">Throw when the memory region specified outside the addressable space</exception>
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private void AssertValidAddressAndSize(ulong va, ulong size)
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{
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if (!ValidateAddressAndSize(va, size))
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{
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throw new InvalidMemoryRegionException($"va=0x{va:X16}, size=0x{size:X16}");
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}
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}
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private ulong GetPhysicalAddressInternal(ulong va)
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{
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return PteToPa(_pageTable.Read<ulong>((va / PageSize) * PteSize) & ~(0xffffUL << 48)) + (va & PageMask);
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@ -691,5 +624,11 @@ namespace Ryujinx.Cpu.Jit
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/// Disposes of resources used by the memory manager.
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/// </summary>
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protected override void Destroy() => _pageTable.Dispose();
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protected override Span<byte> GetPhysicalAddressSpan(ulong pa, int size)
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=> _backingMemory.GetSpan(pa, size);
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protected override ulong TranslateVirtualAddressForRead(ulong va)
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=> GetPhysicalAddressInternal(va);
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}
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}
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@ -13,12 +13,8 @@ namespace Ryujinx.Cpu.Jit
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/// <summary>
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/// Represents a CPU memory manager which maps guest virtual memory directly onto a host virtual region.
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/// </summary>
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public sealed class MemoryManagerHostMapped : MemoryManagerBase, IMemoryManager, IVirtualMemoryManagerTracked, IWritableBlock
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public sealed class MemoryManagerHostMapped : VirtualMemoryManagerRefCountedBase<ulong, ulong>, IMemoryManager, IVirtualMemoryManagerTracked, IWritableBlock
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{
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public const int PageBits = 12;
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public const int PageSize = 1 << PageBits;
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public const int PageMask = PageSize - 1;
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public const int PageToPteShift = 5; // 32 pages (2 bits each) in one ulong page table entry.
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public const ulong BlockMappedMask = 0x5555555555555555; // First bit of each table entry set.
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@ -39,8 +35,6 @@ namespace Ryujinx.Cpu.Jit
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private readonly AddressSpace _addressSpace;
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public ulong AddressSpaceSize { get; }
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private readonly PageTable<ulong> _pageTable;
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private readonly MemoryEhMeilleure _memoryEh;
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@ -60,6 +54,8 @@ namespace Ryujinx.Cpu.Jit
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public event Action<ulong, ulong> UnmapEvent;
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protected override ulong AddressSpaceSize { get; }
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/// <summary>
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/// Creates a new instance of the host mapped memory manager.
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/// </summary>
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@ -91,42 +87,6 @@ namespace Ryujinx.Cpu.Jit
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_memoryEh = new MemoryEhMeilleure(_addressSpace.Base, _addressSpace.Mirror, Tracking);
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}
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/// <summary>
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/// Checks if the virtual address is part of the addressable space.
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/// </summary>
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/// <param name="va">Virtual address</param>
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/// <returns>True if the virtual address is part of the addressable space</returns>
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private bool ValidateAddress(ulong va)
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{
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return va < AddressSpaceSize;
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}
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/// <summary>
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/// Checks if the combination of virtual address and size is part of the addressable space.
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/// </summary>
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/// <param name="va">Virtual address of the range</param>
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/// <param name="size">Size of the range in bytes</param>
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/// <returns>True if the combination of virtual address and size is part of the addressable space</returns>
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private bool ValidateAddressAndSize(ulong va, ulong size)
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{
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ulong endVa = va + size;
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return endVa >= va && endVa >= size && endVa <= AddressSpaceSize;
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}
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/// <summary>
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/// Ensures the combination of virtual address and size is part of the addressable space.
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/// </summary>
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/// <param name="va">Virtual address of the range</param>
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/// <param name="size">Size of the range in bytes</param>
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/// <exception cref="InvalidMemoryRegionException">Throw when the memory region specified outside the addressable space</exception>
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private void AssertValidAddressAndSize(ulong va, ulong size)
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{
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if (!ValidateAddressAndSize(va, size))
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{
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throw new InvalidMemoryRegionException($"va=0x{va:X16}, size=0x{size:X16}");
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}
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}
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/// <summary>
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/// Ensures the combination of virtual address and size is part of the addressable space and fully mapped.
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/// </summary>
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@ -235,7 +195,7 @@ namespace Ryujinx.Cpu.Jit
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}
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/// <inheritdoc/>
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public void Read(ulong va, Span<byte> data)
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public override void Read(ulong va, Span<byte> data)
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{
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try
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{
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@ -816,6 +776,10 @@ namespace Ryujinx.Cpu.Jit
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_memoryEh.Dispose();
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}
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private static void ThrowInvalidMemoryRegionException(string message) => throw new InvalidMemoryRegionException(message);
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protected override Span<byte> GetPhysicalAddressSpan(ulong pa, int size)
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=> _addressSpace.Mirror.GetSpan(pa, size);
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protected override ulong TranslateVirtualAddressForRead(ulong va)
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=> va;
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}
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}
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@ -1,10 +1,13 @@
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using Ryujinx.Memory;
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using System.Diagnostics;
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using System.Numerics;
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using System.Threading;
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namespace Ryujinx.Cpu
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{
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public abstract class MemoryManagerBase : IRefCounted
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public abstract class VirtualMemoryManagerRefCountedBase<TVirtual, TPhysical> : VirtualMemoryManagerBase<TVirtual, TPhysical>, IRefCounted
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where TVirtual : IBinaryInteger<TVirtual>
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where TPhysical : IBinaryInteger<TPhysical>
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{
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private int _referenceCount;
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@ -11,12 +11,8 @@ namespace Ryujinx.Memory
|
|||
/// Represents a address space manager.
|
||||
/// Supports virtual memory region mapping, address translation and read/write access to mapped regions.
|
||||
/// </summary>
|
||||
public sealed class AddressSpaceManager : IVirtualMemoryManager, IWritableBlock
|
||||
public sealed class AddressSpaceManager : VirtualMemoryManagerBase<ulong, nuint>, IVirtualMemoryManager, IWritableBlock
|
||||
{
|
||||
public const int PageBits = PageTable<nuint>.PageBits;
|
||||
public const int PageSize = PageTable<nuint>.PageSize;
|
||||
public const int PageMask = PageTable<nuint>.PageMask;
|
||||
|
||||
/// <inheritdoc/>
|
||||
public bool Supports4KBPages => true;
|
||||
|
||||
|
|
@ -25,11 +21,11 @@ namespace Ryujinx.Memory
|
|||
/// </summary>
|
||||
public int AddressSpaceBits { get; }
|
||||
|
||||
private readonly ulong _addressSpaceSize;
|
||||
|
||||
private readonly MemoryBlock _backingMemory;
|
||||
private readonly PageTable<nuint> _pageTable;
|
||||
|
||||
protected override ulong AddressSpaceSize { get; }
|
||||
|
||||
/// <summary>
|
||||
/// Creates a new instance of the memory manager.
|
||||
/// </summary>
|
||||
|
|
@ -47,7 +43,7 @@ namespace Ryujinx.Memory
|
|||
}
|
||||
|
||||
AddressSpaceBits = asBits;
|
||||
_addressSpaceSize = asSize;
|
||||
AddressSpaceSize = asSize;
|
||||
_backingMemory = backingMemory;
|
||||
_pageTable = new PageTable<nuint>();
|
||||
}
|
||||
|
|
@ -102,12 +98,6 @@ namespace Ryujinx.Memory
|
|||
return MemoryMarshal.Cast<byte, T>(GetSpan(va, Unsafe.SizeOf<T>()))[0];
|
||||
}
|
||||
|
||||
/// <inheritdoc/>
|
||||
public void Read(ulong va, Span<byte> data)
|
||||
{
|
||||
ReadImpl(va, data);
|
||||
}
|
||||
|
||||
/// <inheritdoc/>
|
||||
public void Write<T>(ulong va, T value) where T : unmanaged
|
||||
{
|
||||
|
|
@ -174,7 +164,7 @@ namespace Ryujinx.Memory
|
|||
{
|
||||
Span<byte> data = new byte[size];
|
||||
|
||||
ReadImpl(va, data);
|
||||
Read(va, data);
|
||||
|
||||
return data;
|
||||
}
|
||||
|
|
@ -346,34 +336,6 @@ namespace Ryujinx.Memory
|
|||
return regions;
|
||||
}
|
||||
|
||||
private void ReadImpl(ulong va, Span<byte> data)
|
||||
{
|
||||
if (data.Length == 0)
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
AssertValidAddressAndSize(va, (ulong)data.Length);
|
||||
|
||||
int offset = 0, size;
|
||||
|
||||
if ((va & PageMask) != 0)
|
||||
{
|
||||
size = Math.Min(data.Length, PageSize - (int)(va & PageMask));
|
||||
|
||||
GetHostSpanContiguous(va, size).CopyTo(data[..size]);
|
||||
|
||||
offset += size;
|
||||
}
|
||||
|
||||
for (; offset < data.Length; offset += size)
|
||||
{
|
||||
size = Math.Min(data.Length - offset, PageSize);
|
||||
|
||||
GetHostSpanContiguous(va + (ulong)offset, size).CopyTo(data.Slice(offset, size));
|
||||
}
|
||||
}
|
||||
|
||||
/// <inheritdoc/>
|
||||
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
||||
public bool IsMapped(ulong va)
|
||||
|
|
@ -414,37 +376,6 @@ namespace Ryujinx.Memory
|
|||
return true;
|
||||
}
|
||||
|
||||
private bool ValidateAddress(ulong va)
|
||||
{
|
||||
return va < _addressSpaceSize;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Checks if the combination of virtual address and size is part of the addressable space.
|
||||
/// </summary>
|
||||
/// <param name="va">Virtual address of the range</param>
|
||||
/// <param name="size">Size of the range in bytes</param>
|
||||
/// <returns>True if the combination of virtual address and size is part of the addressable space</returns>
|
||||
private bool ValidateAddressAndSize(ulong va, ulong size)
|
||||
{
|
||||
ulong endVa = va + size;
|
||||
return endVa >= va && endVa >= size && endVa <= _addressSpaceSize;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Ensures the combination of virtual address and size is part of the addressable space.
|
||||
/// </summary>
|
||||
/// <param name="va">Virtual address of the range</param>
|
||||
/// <param name="size">Size of the range in bytes</param>
|
||||
/// <exception cref="InvalidMemoryRegionException">Throw when the memory region specified outside the addressable space</exception>
|
||||
private void AssertValidAddressAndSize(ulong va, ulong size)
|
||||
{
|
||||
if (!ValidateAddressAndSize(va, size))
|
||||
{
|
||||
throw new InvalidMemoryRegionException($"va=0x{va:X16}, size=0x{size:X16}");
|
||||
}
|
||||
}
|
||||
|
||||
private unsafe Span<byte> GetHostSpanContiguous(ulong va, int size)
|
||||
{
|
||||
return new Span<byte>((void*)GetHostAddress(va), size);
|
||||
|
|
@ -471,5 +402,11 @@ namespace Ryujinx.Memory
|
|||
{
|
||||
// Only the ARM Memory Manager has tracking for now.
|
||||
}
|
||||
|
||||
protected override unsafe Span<byte> GetPhysicalAddressSpan(nuint pa, int size)
|
||||
=> new((void*)pa, size);
|
||||
|
||||
protected override nuint TranslateVirtualAddressForRead(ulong va)
|
||||
=> GetHostAddress(va);
|
||||
}
|
||||
}
|
||||
|
|
|
|||
91
src/Ryujinx.Memory/VirtualMemoryManagerBase.cs
Normal file
91
src/Ryujinx.Memory/VirtualMemoryManagerBase.cs
Normal file
|
|
@ -0,0 +1,91 @@
|
|||
using System;
|
||||
using System.Numerics;
|
||||
|
||||
namespace Ryujinx.Memory
|
||||
{
|
||||
public abstract class VirtualMemoryManagerBase<TVirtual, TPhysical>
|
||||
where TVirtual : IBinaryInteger<TVirtual>
|
||||
where TPhysical : IBinaryInteger<TPhysical>
|
||||
{
|
||||
public const int PageBits = 12;
|
||||
public const int PageSize = 1 << PageBits;
|
||||
public const int PageMask = PageSize - 1;
|
||||
|
||||
protected abstract TVirtual AddressSpaceSize { get; }
|
||||
|
||||
public virtual void Read(TVirtual va, Span<byte> data)
|
||||
{
|
||||
if (data.Length == 0)
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
AssertValidAddressAndSize(va, TVirtual.CreateChecked(data.Length));
|
||||
|
||||
int offset = 0, size;
|
||||
|
||||
if ((int.CreateTruncating(va) & PageMask) != 0)
|
||||
{
|
||||
TPhysical pa = TranslateVirtualAddressForRead(va);
|
||||
|
||||
size = Math.Min(data.Length, PageSize - ((int.CreateTruncating(va) & PageMask)));
|
||||
|
||||
GetPhysicalAddressSpan(pa, size).CopyTo(data[..size]);
|
||||
|
||||
offset += size;
|
||||
}
|
||||
|
||||
for (; offset < data.Length; offset += size)
|
||||
{
|
||||
TPhysical pa = TranslateVirtualAddressForRead(va + TVirtual.CreateChecked(offset));
|
||||
|
||||
size = Math.Min(data.Length - offset, PageSize);
|
||||
|
||||
GetPhysicalAddressSpan(pa, size).CopyTo(data.Slice(offset, size));
|
||||
}
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Ensures the combination of virtual address and size is part of the addressable space.
|
||||
/// </summary>
|
||||
/// <param name="va">Virtual address of the range</param>
|
||||
/// <param name="size">Size of the range in bytes</param>
|
||||
/// <exception cref="InvalidMemoryRegionException">Throw when the memory region specified outside the addressable space</exception>
|
||||
protected void AssertValidAddressAndSize(TVirtual va, TVirtual size)
|
||||
{
|
||||
if (!ValidateAddressAndSize(va, size))
|
||||
{
|
||||
throw new InvalidMemoryRegionException($"va=0x{va:X16}, size=0x{size:X16}");
|
||||
}
|
||||
}
|
||||
|
||||
protected abstract Span<byte> GetPhysicalAddressSpan(TPhysical pa, int size);
|
||||
|
||||
protected abstract TPhysical TranslateVirtualAddressForRead(TVirtual va);
|
||||
|
||||
/// <summary>
|
||||
/// Checks if the virtual address is part of the addressable space.
|
||||
/// </summary>
|
||||
/// <param name="va">Virtual address</param>
|
||||
/// <returns>True if the virtual address is part of the addressable space</returns>
|
||||
protected bool ValidateAddress(TVirtual va)
|
||||
{
|
||||
return va < AddressSpaceSize;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Checks if the combination of virtual address and size is part of the addressable space.
|
||||
/// </summary>
|
||||
/// <param name="va">Virtual address of the range</param>
|
||||
/// <param name="size">Size of the range in bytes</param>
|
||||
/// <returns>True if the combination of virtual address and size is part of the addressable space</returns>
|
||||
protected bool ValidateAddressAndSize(TVirtual va, TVirtual size)
|
||||
{
|
||||
TVirtual endVa = va + size;
|
||||
return endVa >= va && endVa >= size && endVa <= AddressSpaceSize;
|
||||
}
|
||||
|
||||
protected static void ThrowInvalidMemoryRegionException(string message)
|
||||
=> throw new InvalidMemoryRegionException(message);
|
||||
}
|
||||
}
|
||||
Loading…
Reference in a new issue