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authorTSR Berry <20988865+TSRBerry@users.noreply.github.com>2023-04-08 01:22:00 +0200
committerMary <thog@protonmail.com>2023-04-27 23:51:14 +0200
commitcee712105850ac3385cd0091a923438167433f9f (patch)
tree4a5274b21d8b7f938c0d0ce18736d3f2993b11b1 /Ryujinx.Memory/AddressSpaceManager.cs
parentcd124bda587ef09668a971fa1cac1c3f0cfc9f21 (diff)
Move solution and projects to src
Diffstat (limited to 'Ryujinx.Memory/AddressSpaceManager.cs')
-rw-r--r--Ryujinx.Memory/AddressSpaceManager.cs470
1 files changed, 0 insertions, 470 deletions
diff --git a/Ryujinx.Memory/AddressSpaceManager.cs b/Ryujinx.Memory/AddressSpaceManager.cs
deleted file mode 100644
index ac89fca6..00000000
--- a/Ryujinx.Memory/AddressSpaceManager.cs
+++ /dev/null
@@ -1,470 +0,0 @@
-using Ryujinx.Memory.Range;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Runtime.CompilerServices;
-using System.Runtime.InteropServices;
-
-namespace Ryujinx.Memory
-{
- /// <summary>
- /// 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 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;
-
- /// <summary>
- /// Address space width in bits.
- /// </summary>
- public int AddressSpaceBits { get; }
-
- private readonly ulong _addressSpaceSize;
-
- private readonly MemoryBlock _backingMemory;
- private readonly PageTable<nuint> _pageTable;
-
- /// <summary>
- /// Creates a new instance of the memory manager.
- /// </summary>
- /// <param name="backingMemory">Physical backing memory where virtual memory will be mapped to</param>
- /// <param name="addressSpaceSize">Size of the address space</param>
- public AddressSpaceManager(MemoryBlock backingMemory, ulong addressSpaceSize)
- {
- ulong asSize = PageSize;
- int asBits = PageBits;
-
- while (asSize < addressSpaceSize)
- {
- asSize <<= 1;
- asBits++;
- }
-
- AddressSpaceBits = asBits;
- _addressSpaceSize = asSize;
- _backingMemory = backingMemory;
- _pageTable = new PageTable<nuint>();
- }
-
- /// <inheritdoc/>
- public void Map(ulong va, ulong pa, ulong size, MemoryMapFlags flags)
- {
- AssertValidAddressAndSize(va, size);
-
- while (size != 0)
- {
- _pageTable.Map(va, (nuint)(ulong)_backingMemory.GetPointer(pa, PageSize));
-
- va += PageSize;
- pa += PageSize;
- size -= PageSize;
- }
- }
-
- /// <inheritdoc/>
- public void MapForeign(ulong va, nuint hostPointer, ulong size)
- {
- AssertValidAddressAndSize(va, size);
-
- while (size != 0)
- {
- _pageTable.Map(va, hostPointer);
-
- va += PageSize;
- hostPointer += PageSize;
- size -= PageSize;
- }
- }
-
- /// <inheritdoc/>
- public void Unmap(ulong va, ulong size)
- {
- AssertValidAddressAndSize(va, size);
-
- while (size != 0)
- {
- _pageTable.Unmap(va);
-
- va += PageSize;
- size -= PageSize;
- }
- }
-
- /// <inheritdoc/>
- public T Read<T>(ulong va) where T : unmanaged
- {
- 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
- {
- Write(va, MemoryMarshal.Cast<T, byte>(MemoryMarshal.CreateSpan(ref value, 1)));
- }
-
- /// <inheritdoc/>
- public void Write(ulong va, ReadOnlySpan<byte> data)
- {
- if (data.Length == 0)
- {
- return;
- }
-
- AssertValidAddressAndSize(va, (ulong)data.Length);
-
- if (IsContiguousAndMapped(va, data.Length))
- {
- data.CopyTo(GetHostSpanContiguous(va, data.Length));
- }
- else
- {
- int offset = 0, size;
-
- if ((va & PageMask) != 0)
- {
- size = Math.Min(data.Length, PageSize - (int)(va & PageMask));
-
- data.Slice(0, size).CopyTo(GetHostSpanContiguous(va, size));
-
- offset += size;
- }
-
- for (; offset < data.Length; offset += size)
- {
- size = Math.Min(data.Length - offset, PageSize);
-
- data.Slice(offset, size).CopyTo(GetHostSpanContiguous(va + (ulong)offset, size));
- }
- }
- }
-
- /// <inheritdoc/>
- public bool WriteWithRedundancyCheck(ulong va, ReadOnlySpan<byte> data)
- {
- Write(va, data);
-
- return true;
- }
-
- /// <inheritdoc/>
- public ReadOnlySpan<byte> GetSpan(ulong va, int size, bool tracked = false)
- {
- if (size == 0)
- {
- return ReadOnlySpan<byte>.Empty;
- }
-
- if (IsContiguousAndMapped(va, size))
- {
- return GetHostSpanContiguous(va, size);
- }
- else
- {
- Span<byte> data = new byte[size];
-
- ReadImpl(va, data);
-
- return data;
- }
- }
-
- /// <inheritdoc/>
- public unsafe WritableRegion GetWritableRegion(ulong va, int size, bool tracked = false)
- {
- if (size == 0)
- {
- return new WritableRegion(null, va, Memory<byte>.Empty);
- }
-
- if (IsContiguousAndMapped(va, size))
- {
- return new WritableRegion(null, va, new NativeMemoryManager<byte>((byte*)GetHostAddress(va), size).Memory);
- }
- else
- {
- Memory<byte> memory = new byte[size];
-
- GetSpan(va, size).CopyTo(memory.Span);
-
- return new WritableRegion(this, va, memory);
- }
- }
-
- /// <inheritdoc/>
- public unsafe ref T GetRef<T>(ulong va) where T : unmanaged
- {
- if (!IsContiguous(va, Unsafe.SizeOf<T>()))
- {
- ThrowMemoryNotContiguous();
- }
-
- return ref *(T*)GetHostAddress(va);
- }
-
- /// <inheritdoc/>
- [MethodImpl(MethodImplOptions.AggressiveInlining)]
- private int GetPagesCount(ulong va, uint size, out ulong startVa)
- {
- // WARNING: Always check if ulong does not overflow during the operations.
- startVa = va & ~(ulong)PageMask;
- ulong vaSpan = (va - startVa + size + PageMask) & ~(ulong)PageMask;
-
- return (int)(vaSpan / PageSize);
- }
-
- private void ThrowMemoryNotContiguous() => throw new MemoryNotContiguousException();
-
- [MethodImpl(MethodImplOptions.AggressiveInlining)]
- private bool IsContiguousAndMapped(ulong va, int size) => IsContiguous(va, size) && IsMapped(va);
-
- [MethodImpl(MethodImplOptions.AggressiveInlining)]
- private bool IsContiguous(ulong va, int size)
- {
- if (!ValidateAddress(va) || !ValidateAddressAndSize(va, (ulong)size))
- {
- return false;
- }
-
- int pages = GetPagesCount(va, (uint)size, out va);
-
- for (int page = 0; page < pages - 1; page++)
- {
- if (!ValidateAddress(va + PageSize))
- {
- return false;
- }
-
- if (GetHostAddress(va) + PageSize != GetHostAddress(va + PageSize))
- {
- return false;
- }
-
- va += PageSize;
- }
-
- return true;
- }
-
- /// <inheritdoc/>
- public IEnumerable<HostMemoryRange> GetHostRegions(ulong va, ulong size)
- {
- if (size == 0)
- {
- return Enumerable.Empty<HostMemoryRange>();
- }
-
- return GetHostRegionsImpl(va, size);
- }
-
- /// <inheritdoc/>
- public IEnumerable<MemoryRange> GetPhysicalRegions(ulong va, ulong size)
- {
- if (size == 0)
- {
- return Enumerable.Empty<MemoryRange>();
- }
-
- var hostRegions = GetHostRegionsImpl(va, size);
- if (hostRegions == null)
- {
- return null;
- }
-
- var regions = new MemoryRange[hostRegions.Count];
-
- ulong backingStart = (ulong)_backingMemory.Pointer;
- ulong backingEnd = backingStart + _backingMemory.Size;
-
- int count = 0;
-
- for (int i = 0; i < regions.Length; i++)
- {
- var hostRegion = hostRegions[i];
-
- if ((ulong)hostRegion.Address >= backingStart && (ulong)hostRegion.Address < backingEnd)
- {
- regions[count++] = new MemoryRange((ulong)hostRegion.Address - backingStart, hostRegion.Size);
- }
- }
-
- if (count != regions.Length)
- {
- return new ArraySegment<MemoryRange>(regions, 0, count);
- }
-
- return regions;
- }
-
- private List<HostMemoryRange> GetHostRegionsImpl(ulong va, ulong size)
- {
- if (!ValidateAddress(va) || !ValidateAddressAndSize(va, size))
- {
- return null;
- }
-
- int pages = GetPagesCount(va, (uint)size, out va);
-
- var regions = new List<HostMemoryRange>();
-
- nuint regionStart = GetHostAddress(va);
- ulong regionSize = PageSize;
-
- for (int page = 0; page < pages - 1; page++)
- {
- if (!ValidateAddress(va + PageSize))
- {
- return null;
- }
-
- nuint newHostAddress = GetHostAddress(va + PageSize);
-
- if (GetHostAddress(va) + PageSize != newHostAddress)
- {
- regions.Add(new HostMemoryRange(regionStart, regionSize));
- regionStart = newHostAddress;
- regionSize = 0;
- }
-
- va += PageSize;
- regionSize += PageSize;
- }
-
- regions.Add(new HostMemoryRange(regionStart, regionSize));
-
- 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.Slice(0, 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)
- {
- if (!ValidateAddress(va))
- {
- return false;
- }
-
- return _pageTable.Read(va) != 0;
- }
-
- /// <inheritdoc/>
- public bool IsRangeMapped(ulong va, ulong size)
- {
- if (size == 0UL)
- {
- return true;
- }
-
- if (!ValidateAddressAndSize(va, size))
- {
- return false;
- }
-
- int pages = GetPagesCount(va, (uint)size, out va);
-
- for (int page = 0; page < pages; page++)
- {
- if (!IsMapped(va))
- {
- return false;
- }
-
- va += PageSize;
- }
-
- 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);
- }
-
- private nuint GetHostAddress(ulong va)
- {
- return _pageTable.Read(va) + (nuint)(va & PageMask);
- }
-
- /// <inheritdoc/>
- public void TrackingReprotect(ulong va, ulong size, MemoryPermission protection)
- {
- throw new NotImplementedException();
- }
-
- /// <inheritdoc/>
- public void SignalMemoryTracking(ulong va, ulong size, bool write, bool precise = false, int? exemptId = null)
- {
- // Only the ARM Memory Manager has tracking for now.
- }
- }
-}