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@@ -0,0 +1,947 @@
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+using ARMeilleure.Memory;
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+using Ryujinx.Cpu.Tracking;
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+using Ryujinx.Memory;
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+using Ryujinx.Memory.Range;
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+using Ryujinx.Memory.Tracking;
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+using System;
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+using System.Collections.Generic;
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+using System.Linq;
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+using System.Runtime.CompilerServices;
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+using System.Runtime.InteropServices;
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+using System.Threading;
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+
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+namespace Ryujinx.Cpu.AppleHv
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+{
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+ /// <summary>
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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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+ public class HvMemoryManager : MemoryManagerBase, 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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+
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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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+
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+ private enum HostMappedPtBits : ulong
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+ {
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+ Unmapped = 0,
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+ Mapped,
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+ WriteTracked,
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+ ReadWriteTracked,
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+
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+ MappedReplicated = 0x5555555555555555,
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+ WriteTrackedReplicated = 0xaaaaaaaaaaaaaaaa,
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+ ReadWriteTrackedReplicated = ulong.MaxValue
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+ }
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+
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+ private readonly InvalidAccessHandler _invalidAccessHandler;
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+
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+ private readonly ulong _addressSpaceSize;
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+
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+ private readonly HvAddressSpace _addressSpace;
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+
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+ internal HvAddressSpace AddressSpace => _addressSpace;
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+
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+ private readonly MemoryBlock _backingMemory;
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+ private readonly PageTable<ulong> _pageTable;
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+
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+ private readonly ulong[] _pageBitmap;
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+
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+ public bool Supports4KBPages => true;
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+
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+ public int AddressSpaceBits { get; }
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+
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+ public IntPtr PageTablePointer => IntPtr.Zero;
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+
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+ public MemoryManagerType Type => MemoryManagerType.SoftwarePageTable;
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+
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+ public MemoryTracking Tracking { get; }
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+
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+ public event Action<ulong, ulong> UnmapEvent;
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+
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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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+ /// <param name="backingMemory">Physical backing memory where virtual memory will be mapped to</param>
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+ /// <param name="addressSpaceSize">Size of the address space</param>
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+ /// <param name="invalidAccessHandler">Optional function to handle invalid memory accesses</param>
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+ public HvMemoryManager(MemoryBlock backingMemory, ulong addressSpaceSize, InvalidAccessHandler invalidAccessHandler = null)
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+ {
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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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+
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+ ulong asSize = PageSize;
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+ int asBits = PageBits;
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+
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+ while (asSize < addressSpaceSize)
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+ {
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+ asSize <<= 1;
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+ asBits++;
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+ }
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+
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+ _addressSpace = new HvAddressSpace(backingMemory, asSize);
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+
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+ AddressSpaceBits = asBits;
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+
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+ _pageBitmap = new ulong[1 << (AddressSpaceBits - (PageBits + PageToPteShift))];
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+ Tracking = new MemoryTracking(this, PageSize, invalidAccessHandler);
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+ }
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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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+
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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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+
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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($"va=0x{va:X16}, size=0x{size:X16}");
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+ }
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+ }
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+
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+ /// <summary>
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+ /// Ensures the combination of virtual address and size is part of the addressable space and fully mapped.
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+ /// </summary>
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+ /// <param name="va">Virtual address of the range</param>
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+ /// <param name="size">Size of the range in bytes</param>
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+ private void AssertMapped(ulong va, ulong size)
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+ {
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+ if (!ValidateAddressAndSize(va, size) || !IsRangeMappedImpl(va, size))
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+ {
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+ throw new InvalidMemoryRegionException($"Not mapped: va=0x{va:X16}, size=0x{size:X16}");
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+ }
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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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+ AssertValidAddressAndSize(va, size);
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+
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+ PtMap(va, pa, size);
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+ _addressSpace.MapUser(va, pa, size, MemoryPermission.ReadWriteExecute);
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+ AddMapping(va, size);
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+
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+ Tracking.Map(va, size);
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+ }
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+
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+ private void PtMap(ulong va, ulong pa, ulong size)
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+ {
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+ while (size != 0)
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+ {
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+ _pageTable.Map(va, pa);
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+
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+ va += PageSize;
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+ pa += PageSize;
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+ size -= PageSize;
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+ }
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+ }
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+
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+ /// <inheritdoc/>
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+ public void MapForeign(ulong va, nuint hostPointer, ulong size)
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+ {
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+ throw new NotSupportedException();
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+ }
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+
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+ /// <inheritdoc/>
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+ public void Unmap(ulong va, ulong size)
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+ {
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+ AssertValidAddressAndSize(va, size);
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+
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+ UnmapEvent?.Invoke(va, size);
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+ Tracking.Unmap(va, size);
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+
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+ RemoveMapping(va, size);
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+ _addressSpace.UnmapUser(va, size);
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+ PtUnmap(va, size);
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+ }
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+
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+ private void PtUnmap(ulong va, ulong size)
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+ {
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+ while (size != 0)
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+ {
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+ _pageTable.Unmap(va);
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+
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+ va += PageSize;
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+ size -= PageSize;
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+ }
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+ }
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+
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+ /// <inheritdoc/>
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+ public T Read<T>(ulong va) where T : unmanaged
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+ {
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+ return MemoryMarshal.Cast<byte, T>(GetSpan(va, Unsafe.SizeOf<T>()))[0];
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+ }
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+
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+ /// <inheritdoc/>
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+ public T ReadTracked<T>(ulong va) where T : unmanaged
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+ {
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+ try
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+ {
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+ SignalMemoryTracking(va, (ulong)Unsafe.SizeOf<T>(), false);
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+
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+ return Read<T>(va);
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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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+ return default;
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+ }
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+ }
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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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+ {
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+ ReadImpl(va, data);
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+ }
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+
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+ /// <inheritdoc/>
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+ public void Write<T>(ulong va, T value) where T : unmanaged
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+ {
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+ Write(va, MemoryMarshal.Cast<T, byte>(MemoryMarshal.CreateSpan(ref value, 1)));
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+ }
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+
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+ /// <inheritdoc/>
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+ public void Write(ulong va, ReadOnlySpan<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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+
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+ SignalMemoryTracking(va, (ulong)data.Length, true);
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+
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+ WriteImpl(va, data);
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+ }
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+
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+ /// <inheritdoc/>
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+ public void WriteUntracked(ulong va, ReadOnlySpan<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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+
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+ WriteImpl(va, data);
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+ }
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+
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+ /// <inheritdoc/>
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+ public bool WriteWithRedundancyCheck(ulong va, ReadOnlySpan<byte> data)
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+ {
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+ if (data.Length == 0)
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+ {
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+ return false;
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+ }
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+
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+ SignalMemoryTracking(va, (ulong)data.Length, false);
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+
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+ if (IsContiguousAndMapped(va, data.Length))
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+ {
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+ var target = _backingMemory.GetSpan(GetPhysicalAddressInternal(va), data.Length);
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+
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+ bool changed = !data.SequenceEqual(target);
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+
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+ if (changed)
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+ {
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+ data.CopyTo(target);
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+ }
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+
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+ return changed;
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+ }
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+ else
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+ {
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+ WriteImpl(va, data);
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+
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+ return true;
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+ }
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+ }
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+
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+ private void WriteImpl(ulong va, ReadOnlySpan<byte> data)
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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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+
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+ if (IsContiguousAndMapped(va, data.Length))
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+ {
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+ data.CopyTo(_backingMemory.GetSpan(GetPhysicalAddressInternal(va), data.Length));
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+ }
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+ else
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+ {
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+ int offset = 0, size;
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+
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+ if ((va & PageMask) != 0)
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+ {
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+ ulong pa = GetPhysicalAddressChecked(va);
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+
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+ size = Math.Min(data.Length, PageSize - (int)(va & PageMask));
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+
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+ data.Slice(0, size).CopyTo(_backingMemory.GetSpan(pa, size));
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+
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+ offset += size;
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+ }
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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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+
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+ size = Math.Min(data.Length - offset, PageSize);
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+
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+ data.Slice(offset, size).CopyTo(_backingMemory.GetSpan(pa, size));
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+ }
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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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+
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+ /// <inheritdoc/>
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+ public ReadOnlySpan<byte> GetSpan(ulong va, int size, bool tracked = false)
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+ {
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+ if (size == 0)
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+ {
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+ return ReadOnlySpan<byte>.Empty;
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+ }
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+
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+ if (tracked)
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+ {
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+ SignalMemoryTracking(va, (ulong)size, false);
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+ }
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+
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+ if (IsContiguousAndMapped(va, size))
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+ {
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+ return _backingMemory.GetSpan(GetPhysicalAddressInternal(va), size);
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+ }
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+ else
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+ {
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+ Span<byte> data = new byte[size];
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+
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+ ReadImpl(va, data);
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+
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+ return data;
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+ }
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+ }
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+
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+ /// <inheritdoc/>
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+ public WritableRegion GetWritableRegion(ulong va, int size, bool tracked = false)
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+ {
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+ if (size == 0)
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+ {
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+ return new WritableRegion(null, va, Memory<byte>.Empty);
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+ }
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+
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+ if (tracked)
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+ {
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+ SignalMemoryTracking(va, (ulong)size, true);
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+ }
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+
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+ if (IsContiguousAndMapped(va, size))
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+ {
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+ return new WritableRegion(null, va, _backingMemory.GetMemory(GetPhysicalAddressInternal(va), size));
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+ }
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+ else
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+ {
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+ Memory<byte> memory = new byte[size];
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+
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+ ReadImpl(va, memory.Span);
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+
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+ return new WritableRegion(this, va, memory);
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+ }
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+ }
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+
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+ /// <inheritdoc/>
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+ public ref T GetRef<T>(ulong va) where T : unmanaged
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+ {
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+ if (!IsContiguous(va, Unsafe.SizeOf<T>()))
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+ {
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+ ThrowMemoryNotContiguous();
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+ }
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+
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+ SignalMemoryTracking(va, (ulong)Unsafe.SizeOf<T>(), true);
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+
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+ return ref _backingMemory.GetRef<T>(GetPhysicalAddressChecked(va));
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+ }
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+
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+ /// <inheritdoc/>
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+ [MethodImpl(MethodImplOptions.AggressiveInlining)]
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+ public bool IsMapped(ulong va)
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+ {
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+ return ValidateAddress(va) && IsMappedImpl(va);
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+ }
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+
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+ [MethodImpl(MethodImplOptions.AggressiveInlining)]
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+ private bool IsMappedImpl(ulong va)
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+ {
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+ ulong page = va >> PageBits;
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+
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+ int bit = (int)((page & 31) << 1);
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+
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+ int pageIndex = (int)(page >> PageToPteShift);
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+ ref ulong pageRef = ref _pageBitmap[pageIndex];
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+
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+ ulong pte = Volatile.Read(ref pageRef);
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+
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+ return ((pte >> bit) & 3) != 0;
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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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+ AssertValidAddressAndSize(va, size);
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+
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+ return IsRangeMappedImpl(va, size);
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+ }
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+
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+ [MethodImpl(MethodImplOptions.AggressiveInlining)]
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+ private void GetPageBlockRange(ulong pageStart, ulong pageEnd, out ulong startMask, out ulong endMask, out int pageIndex, out int pageEndIndex)
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+ {
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+ startMask = ulong.MaxValue << ((int)(pageStart & 31) << 1);
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+ endMask = ulong.MaxValue >> (64 - ((int)(pageEnd & 31) << 1));
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+
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+ pageIndex = (int)(pageStart >> PageToPteShift);
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+ pageEndIndex = (int)((pageEnd - 1) >> PageToPteShift);
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+ }
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+
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+ private bool IsRangeMappedImpl(ulong va, ulong size)
|
|
|
+ {
|
|
|
+ int pages = GetPagesCount(va, size, out _);
|
|
|
+
|
|
|
+ if (pages == 1)
|
|
|
+ {
|
|
|
+ return IsMappedImpl(va);
|
|
|
+ }
|
|
|
+
|
|
|
+ ulong pageStart = va >> PageBits;
|
|
|
+ ulong pageEnd = pageStart + (ulong)pages;
|
|
|
+
|
|
|
+ GetPageBlockRange(pageStart, pageEnd, out ulong startMask, out ulong endMask, out int pageIndex, out int pageEndIndex);
|
|
|
+
|
|
|
+ // Check if either bit in each 2 bit page entry is set.
|
|
|
+ // OR the block with itself shifted down by 1, and check the first bit of each entry.
|
|
|
+
|
|
|
+ ulong mask = BlockMappedMask & startMask;
|
|
|
+
|
|
|
+ while (pageIndex <= pageEndIndex)
|
|
|
+ {
|
|
|
+ if (pageIndex == pageEndIndex)
|
|
|
+ {
|
|
|
+ mask &= endMask;
|
|
|
+ }
|
|
|
+
|
|
|
+ ref ulong pageRef = ref _pageBitmap[pageIndex++];
|
|
|
+ ulong pte = Volatile.Read(ref pageRef);
|
|
|
+
|
|
|
+ pte |= pte >> 1;
|
|
|
+ if ((pte & mask) != mask)
|
|
|
+ {
|
|
|
+ return false;
|
|
|
+ }
|
|
|
+
|
|
|
+ mask = BlockMappedMask;
|
|
|
+ }
|
|
|
+
|
|
|
+ return true;
|
|
|
+ }
|
|
|
+
|
|
|
+ private static 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 (GetPhysicalAddressInternal(va) + PageSize != GetPhysicalAddressInternal(va + PageSize))
|
|
|
+ {
|
|
|
+ return false;
|
|
|
+ }
|
|
|
+
|
|
|
+ va += PageSize;
|
|
|
+ }
|
|
|
+
|
|
|
+ return true;
|
|
|
+ }
|
|
|
+
|
|
|
+ /// <inheritdoc/>
|
|
|
+ public IEnumerable<HostMemoryRange> GetHostRegions(ulong va, ulong size)
|
|
|
+ {
|
|
|
+ if (size == 0)
|
|
|
+ {
|
|
|
+ return Enumerable.Empty<HostMemoryRange>();
|
|
|
+ }
|
|
|
+
|
|
|
+ var guestRegions = GetPhysicalRegionsImpl(va, size);
|
|
|
+ if (guestRegions == null)
|
|
|
+ {
|
|
|
+ return null;
|
|
|
+ }
|
|
|
+
|
|
|
+ var regions = new HostMemoryRange[guestRegions.Count];
|
|
|
+
|
|
|
+ for (int i = 0; i < regions.Length; i++)
|
|
|
+ {
|
|
|
+ var guestRegion = guestRegions[i];
|
|
|
+ IntPtr pointer = _backingMemory.GetPointer(guestRegion.Address, guestRegion.Size);
|
|
|
+ regions[i] = new HostMemoryRange((nuint)(ulong)pointer, guestRegion.Size);
|
|
|
+ }
|
|
|
+
|
|
|
+ return regions;
|
|
|
+ }
|
|
|
+
|
|
|
+ /// <inheritdoc/>
|
|
|
+ public IEnumerable<MemoryRange> GetPhysicalRegions(ulong va, ulong size)
|
|
|
+ {
|
|
|
+ if (size == 0)
|
|
|
+ {
|
|
|
+ return Enumerable.Empty<MemoryRange>();
|
|
|
+ }
|
|
|
+
|
|
|
+ return GetPhysicalRegionsImpl(va, size);
|
|
|
+ }
|
|
|
+
|
|
|
+ private List<MemoryRange> GetPhysicalRegionsImpl(ulong va, ulong size)
|
|
|
+ {
|
|
|
+ if (!ValidateAddress(va) || !ValidateAddressAndSize(va, size))
|
|
|
+ {
|
|
|
+ return null;
|
|
|
+ }
|
|
|
+
|
|
|
+ int pages = GetPagesCount(va, (uint)size, out va);
|
|
|
+
|
|
|
+ var regions = new List<MemoryRange>();
|
|
|
+
|
|
|
+ ulong regionStart = GetPhysicalAddressInternal(va);
|
|
|
+ ulong regionSize = PageSize;
|
|
|
+
|
|
|
+ for (int page = 0; page < pages - 1; page++)
|
|
|
+ {
|
|
|
+ if (!ValidateAddress(va + PageSize))
|
|
|
+ {
|
|
|
+ return null;
|
|
|
+ }
|
|
|
+
|
|
|
+ ulong newPa = GetPhysicalAddressInternal(va + PageSize);
|
|
|
+
|
|
|
+ if (GetPhysicalAddressInternal(va) + PageSize != newPa)
|
|
|
+ {
|
|
|
+ regions.Add(new MemoryRange(regionStart, regionSize));
|
|
|
+ regionStart = newPa;
|
|
|
+ regionSize = 0;
|
|
|
+ }
|
|
|
+
|
|
|
+ va += PageSize;
|
|
|
+ regionSize += PageSize;
|
|
|
+ }
|
|
|
+
|
|
|
+ regions.Add(new MemoryRange(regionStart, regionSize));
|
|
|
+
|
|
|
+ return regions;
|
|
|
+ }
|
|
|
+
|
|
|
+ private void ReadImpl(ulong va, Span<byte> data)
|
|
|
+ {
|
|
|
+ if (data.Length == 0)
|
|
|
+ {
|
|
|
+ return;
|
|
|
+ }
|
|
|
+
|
|
|
+ try
|
|
|
+ {
|
|
|
+ AssertValidAddressAndSize(va, (ulong)data.Length);
|
|
|
+
|
|
|
+ int offset = 0, size;
|
|
|
+
|
|
|
+ if ((va & PageMask) != 0)
|
|
|
+ {
|
|
|
+ ulong pa = GetPhysicalAddressChecked(va);
|
|
|
+
|
|
|
+ size = Math.Min(data.Length, PageSize - (int)(va & PageMask));
|
|
|
+
|
|
|
+ _backingMemory.GetSpan(pa, size).CopyTo(data.Slice(0, size));
|
|
|
+
|
|
|
+ offset += size;
|
|
|
+ }
|
|
|
+
|
|
|
+ for (; offset < data.Length; offset += size)
|
|
|
+ {
|
|
|
+ ulong pa = GetPhysicalAddressChecked(va + (ulong)offset);
|
|
|
+
|
|
|
+ size = Math.Min(data.Length - offset, PageSize);
|
|
|
+
|
|
|
+ _backingMemory.GetSpan(pa, size).CopyTo(data.Slice(offset, size));
|
|
|
+ }
|
|
|
+ }
|
|
|
+ catch (InvalidMemoryRegionException)
|
|
|
+ {
|
|
|
+ if (_invalidAccessHandler == null || !_invalidAccessHandler(va))
|
|
|
+ {
|
|
|
+ throw;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /// <inheritdoc/>
|
|
|
+ /// <remarks>
|
|
|
+ /// This function also validates that the given range is both valid and mapped, and will throw if it is not.
|
|
|
+ /// </remarks>
|
|
|
+ public void SignalMemoryTracking(ulong va, ulong size, bool write, bool precise = false)
|
|
|
+ {
|
|
|
+ AssertValidAddressAndSize(va, size);
|
|
|
+
|
|
|
+ if (precise)
|
|
|
+ {
|
|
|
+ Tracking.VirtualMemoryEvent(va, size, write, precise: true);
|
|
|
+ return;
|
|
|
+ }
|
|
|
+
|
|
|
+ // Software table, used for managed memory tracking.
|
|
|
+
|
|
|
+ int pages = GetPagesCount(va, size, out _);
|
|
|
+ ulong pageStart = va >> PageBits;
|
|
|
+
|
|
|
+ if (pages == 1)
|
|
|
+ {
|
|
|
+ ulong tag = (ulong)(write ? HostMappedPtBits.WriteTracked : HostMappedPtBits.ReadWriteTracked);
|
|
|
+
|
|
|
+ int bit = (int)((pageStart & 31) << 1);
|
|
|
+
|
|
|
+ int pageIndex = (int)(pageStart >> PageToPteShift);
|
|
|
+ ref ulong pageRef = ref _pageBitmap[pageIndex];
|
|
|
+
|
|
|
+ ulong pte = Volatile.Read(ref pageRef);
|
|
|
+ ulong state = ((pte >> bit) & 3);
|
|
|
+
|
|
|
+ if (state >= tag)
|
|
|
+ {
|
|
|
+ Tracking.VirtualMemoryEvent(va, size, write);
|
|
|
+ return;
|
|
|
+ }
|
|
|
+ else if (state == 0)
|
|
|
+ {
|
|
|
+ ThrowInvalidMemoryRegionException($"Not mapped: va=0x{va:X16}, size=0x{size:X16}");
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ ulong pageEnd = pageStart + (ulong)pages;
|
|
|
+
|
|
|
+ GetPageBlockRange(pageStart, pageEnd, out ulong startMask, out ulong endMask, out int pageIndex, out int pageEndIndex);
|
|
|
+
|
|
|
+ ulong mask = startMask;
|
|
|
+
|
|
|
+ ulong anyTrackingTag = (ulong)HostMappedPtBits.WriteTrackedReplicated;
|
|
|
+
|
|
|
+ while (pageIndex <= pageEndIndex)
|
|
|
+ {
|
|
|
+ if (pageIndex == pageEndIndex)
|
|
|
+ {
|
|
|
+ mask &= endMask;
|
|
|
+ }
|
|
|
+
|
|
|
+ ref ulong pageRef = ref _pageBitmap[pageIndex++];
|
|
|
+
|
|
|
+ ulong pte = Volatile.Read(ref pageRef);
|
|
|
+ ulong mappedMask = mask & BlockMappedMask;
|
|
|
+
|
|
|
+ ulong mappedPte = pte | (pte >> 1);
|
|
|
+ if ((mappedPte & mappedMask) != mappedMask)
|
|
|
+ {
|
|
|
+ ThrowInvalidMemoryRegionException($"Not mapped: va=0x{va:X16}, size=0x{size:X16}");
|
|
|
+ }
|
|
|
+
|
|
|
+ pte &= mask;
|
|
|
+ if ((pte & anyTrackingTag) != 0) // Search for any tracking.
|
|
|
+ {
|
|
|
+ // Writes trigger any tracking.
|
|
|
+ // Only trigger tracking from reads if both bits are set on any page.
|
|
|
+ if (write || (pte & (pte >> 1) & BlockMappedMask) != 0)
|
|
|
+ {
|
|
|
+ Tracking.VirtualMemoryEvent(va, size, write);
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ mask = ulong.MaxValue;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /// <summary>
|
|
|
+ /// Computes the number of pages in a virtual address range.
|
|
|
+ /// </summary>
|
|
|
+ /// <param name="va">Virtual address of the range</param>
|
|
|
+ /// <param name="size">Size of the range</param>
|
|
|
+ /// <param name="startVa">The virtual address of the beginning of the first page</param>
|
|
|
+ /// <remarks>This function does not differentiate between allocated and unallocated pages.</remarks>
|
|
|
+ [MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
|
+ private int GetPagesCount(ulong va, ulong 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);
|
|
|
+ }
|
|
|
+
|
|
|
+ /// <inheritdoc/>
|
|
|
+ public void TrackingReprotect(ulong va, ulong size, MemoryPermission protection)
|
|
|
+ {
|
|
|
+ // Protection is inverted on software pages, since the default value is 0.
|
|
|
+ protection = (~protection) & MemoryPermission.ReadAndWrite;
|
|
|
+
|
|
|
+ int pages = GetPagesCount(va, size, out va);
|
|
|
+ ulong pageStart = va >> PageBits;
|
|
|
+
|
|
|
+ if (pages == 1)
|
|
|
+ {
|
|
|
+ ulong protTag = protection switch
|
|
|
+ {
|
|
|
+ MemoryPermission.None => (ulong)HostMappedPtBits.Mapped,
|
|
|
+ MemoryPermission.Write => (ulong)HostMappedPtBits.WriteTracked,
|
|
|
+ _ => (ulong)HostMappedPtBits.ReadWriteTracked,
|
|
|
+ };
|
|
|
+
|
|
|
+ int bit = (int)((pageStart & 31) << 1);
|
|
|
+
|
|
|
+ ulong tagMask = 3UL << bit;
|
|
|
+ ulong invTagMask = ~tagMask;
|
|
|
+
|
|
|
+ ulong tag = protTag << bit;
|
|
|
+
|
|
|
+ int pageIndex = (int)(pageStart >> PageToPteShift);
|
|
|
+ ref ulong pageRef = ref _pageBitmap[pageIndex];
|
|
|
+
|
|
|
+ ulong pte;
|
|
|
+
|
|
|
+ do
|
|
|
+ {
|
|
|
+ pte = Volatile.Read(ref pageRef);
|
|
|
+ }
|
|
|
+ while ((pte & tagMask) != 0 && Interlocked.CompareExchange(ref pageRef, (pte & invTagMask) | tag, pte) != pte);
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ ulong pageEnd = pageStart + (ulong)pages;
|
|
|
+
|
|
|
+ GetPageBlockRange(pageStart, pageEnd, out ulong startMask, out ulong endMask, out int pageIndex, out int pageEndIndex);
|
|
|
+
|
|
|
+ ulong mask = startMask;
|
|
|
+
|
|
|
+ ulong protTag = protection switch
|
|
|
+ {
|
|
|
+ MemoryPermission.None => (ulong)HostMappedPtBits.MappedReplicated,
|
|
|
+ MemoryPermission.Write => (ulong)HostMappedPtBits.WriteTrackedReplicated,
|
|
|
+ _ => (ulong)HostMappedPtBits.ReadWriteTrackedReplicated,
|
|
|
+ };
|
|
|
+
|
|
|
+ while (pageIndex <= pageEndIndex)
|
|
|
+ {
|
|
|
+ if (pageIndex == pageEndIndex)
|
|
|
+ {
|
|
|
+ mask &= endMask;
|
|
|
+ }
|
|
|
+
|
|
|
+ ref ulong pageRef = ref _pageBitmap[pageIndex++];
|
|
|
+
|
|
|
+ ulong pte;
|
|
|
+ ulong mappedMask;
|
|
|
+
|
|
|
+ // Change the protection of all 2 bit entries that are mapped.
|
|
|
+ do
|
|
|
+ {
|
|
|
+ pte = Volatile.Read(ref pageRef);
|
|
|
+
|
|
|
+ mappedMask = pte | (pte >> 1);
|
|
|
+ mappedMask |= (mappedMask & BlockMappedMask) << 1;
|
|
|
+ mappedMask &= mask; // Only update mapped pages within the given range.
|
|
|
+ }
|
|
|
+ while (Interlocked.CompareExchange(ref pageRef, (pte & (~mappedMask)) | (protTag & mappedMask), pte) != pte);
|
|
|
+
|
|
|
+ mask = ulong.MaxValue;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ protection = protection switch
|
|
|
+ {
|
|
|
+ MemoryPermission.None => MemoryPermission.ReadAndWrite,
|
|
|
+ MemoryPermission.Write => MemoryPermission.Read,
|
|
|
+ _ => MemoryPermission.None
|
|
|
+ };
|
|
|
+
|
|
|
+ _addressSpace.ReprotectUser(va, size, protection);
|
|
|
+ }
|
|
|
+
|
|
|
+ /// <inheritdoc/>
|
|
|
+ public CpuRegionHandle BeginTracking(ulong address, ulong size)
|
|
|
+ {
|
|
|
+ return new CpuRegionHandle(Tracking.BeginTracking(address, size));
|
|
|
+ }
|
|
|
+
|
|
|
+ /// <inheritdoc/>
|
|
|
+ public CpuMultiRegionHandle BeginGranularTracking(ulong address, ulong size, IEnumerable<IRegionHandle> handles, ulong granularity)
|
|
|
+ {
|
|
|
+ return new CpuMultiRegionHandle(Tracking.BeginGranularTracking(address, size, handles, granularity));
|
|
|
+ }
|
|
|
+
|
|
|
+ /// <inheritdoc/>
|
|
|
+ public CpuSmartMultiRegionHandle BeginSmartGranularTracking(ulong address, ulong size, ulong granularity)
|
|
|
+ {
|
|
|
+ return new CpuSmartMultiRegionHandle(Tracking.BeginSmartGranularTracking(address, size, granularity));
|
|
|
+ }
|
|
|
+
|
|
|
+ /// <summary>
|
|
|
+ /// Adds the given address mapping to the page table.
|
|
|
+ /// </summary>
|
|
|
+ /// <param name="va">Virtual memory address</param>
|
|
|
+ /// <param name="size">Size to be mapped</param>
|
|
|
+ private void AddMapping(ulong va, ulong size)
|
|
|
+ {
|
|
|
+ int pages = GetPagesCount(va, size, out _);
|
|
|
+ ulong pageStart = va >> PageBits;
|
|
|
+ ulong pageEnd = pageStart + (ulong)pages;
|
|
|
+
|
|
|
+ GetPageBlockRange(pageStart, pageEnd, out ulong startMask, out ulong endMask, out int pageIndex, out int pageEndIndex);
|
|
|
+
|
|
|
+ ulong mask = startMask;
|
|
|
+
|
|
|
+ while (pageIndex <= pageEndIndex)
|
|
|
+ {
|
|
|
+ if (pageIndex == pageEndIndex)
|
|
|
+ {
|
|
|
+ mask &= endMask;
|
|
|
+ }
|
|
|
+
|
|
|
+ ref ulong pageRef = ref _pageBitmap[pageIndex++];
|
|
|
+
|
|
|
+ ulong pte;
|
|
|
+ ulong mappedMask;
|
|
|
+
|
|
|
+ // Map all 2-bit entries that are unmapped.
|
|
|
+ do
|
|
|
+ {
|
|
|
+ pte = Volatile.Read(ref pageRef);
|
|
|
+
|
|
|
+ mappedMask = pte | (pte >> 1);
|
|
|
+ mappedMask |= (mappedMask & BlockMappedMask) << 1;
|
|
|
+ mappedMask |= ~mask; // Treat everything outside the range as mapped, thus unchanged.
|
|
|
+ }
|
|
|
+ while (Interlocked.CompareExchange(ref pageRef, (pte & mappedMask) | (BlockMappedMask & (~mappedMask)), pte) != pte);
|
|
|
+
|
|
|
+ mask = ulong.MaxValue;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /// <summary>
|
|
|
+ /// Removes the given address mapping from the page table.
|
|
|
+ /// </summary>
|
|
|
+ /// <param name="va">Virtual memory address</param>
|
|
|
+ /// <param name="size">Size to be unmapped</param>
|
|
|
+ private void RemoveMapping(ulong va, ulong size)
|
|
|
+ {
|
|
|
+ int pages = GetPagesCount(va, size, out _);
|
|
|
+ ulong pageStart = va >> PageBits;
|
|
|
+ ulong pageEnd = pageStart + (ulong)pages;
|
|
|
+
|
|
|
+ GetPageBlockRange(pageStart, pageEnd, out ulong startMask, out ulong endMask, out int pageIndex, out int pageEndIndex);
|
|
|
+
|
|
|
+ startMask = ~startMask;
|
|
|
+ endMask = ~endMask;
|
|
|
+
|
|
|
+ ulong mask = startMask;
|
|
|
+
|
|
|
+ while (pageIndex <= pageEndIndex)
|
|
|
+ {
|
|
|
+ if (pageIndex == pageEndIndex)
|
|
|
+ {
|
|
|
+ mask |= endMask;
|
|
|
+ }
|
|
|
+
|
|
|
+ ref ulong pageRef = ref _pageBitmap[pageIndex++];
|
|
|
+ ulong pte;
|
|
|
+
|
|
|
+ do
|
|
|
+ {
|
|
|
+ pte = Volatile.Read(ref pageRef);
|
|
|
+ }
|
|
|
+ while (Interlocked.CompareExchange(ref pageRef, pte & mask, pte) != pte);
|
|
|
+
|
|
|
+ mask = 0;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ private ulong GetPhysicalAddressChecked(ulong va)
|
|
|
+ {
|
|
|
+ if (!IsMapped(va))
|
|
|
+ {
|
|
|
+ ThrowInvalidMemoryRegionException($"Not mapped: va=0x{va:X16}");
|
|
|
+ }
|
|
|
+
|
|
|
+ return GetPhysicalAddressInternal(va);
|
|
|
+ }
|
|
|
+
|
|
|
+ private ulong GetPhysicalAddressInternal(ulong va)
|
|
|
+ {
|
|
|
+ return _pageTable.Read(va) + (va & PageMask);
|
|
|
+ }
|
|
|
+
|
|
|
+ /// <summary>
|
|
|
+ /// Disposes of resources used by the memory manager.
|
|
|
+ /// </summary>
|
|
|
+ protected override void Destroy()
|
|
|
+ {
|
|
|
+ _addressSpace.Dispose();
|
|
|
+ }
|
|
|
+
|
|
|
+ private static void ThrowInvalidMemoryRegionException(string message) => throw new InvalidMemoryRegionException(message);
|
|
|
+ }
|
|
|
+}
|