mirror of
https://github.com/Ryujinx/Ryujinx.git
synced 2024-11-24 16:54:15 +00:00
726 lines
25 KiB
C#
726 lines
25 KiB
C#
using ARMeilleure.Memory;
|
|
using Ryujinx.Cpu.Tracking;
|
|
using Ryujinx.Memory;
|
|
using Ryujinx.Memory.Range;
|
|
using Ryujinx.Memory.Tracking;
|
|
using System;
|
|
using System.Collections.Generic;
|
|
using System.Runtime.CompilerServices;
|
|
using System.Threading;
|
|
|
|
namespace Ryujinx.Cpu.Jit
|
|
{
|
|
/// <summary>
|
|
/// Represents a CPU memory manager which maps guest virtual memory directly onto a host virtual region.
|
|
/// </summary>
|
|
public sealed class MemoryManagerHostMapped : MemoryManagerBase, IMemoryManager, IVirtualMemoryManagerTracked, IWritableBlock
|
|
{
|
|
public const int PageBits = 12;
|
|
public const int PageSize = 1 << PageBits;
|
|
public const int PageMask = PageSize - 1;
|
|
|
|
public const int PageToPteShift = 5; // 32 pages (2 bits each) in one ulong page table entry.
|
|
public const ulong BlockMappedMask = 0x5555555555555555; // First bit of each table entry set.
|
|
|
|
private enum HostMappedPtBits : ulong
|
|
{
|
|
Unmapped = 0,
|
|
Mapped,
|
|
WriteTracked,
|
|
ReadWriteTracked,
|
|
|
|
MappedReplicated = 0x5555555555555555,
|
|
WriteTrackedReplicated = 0xaaaaaaaaaaaaaaaa,
|
|
ReadWriteTrackedReplicated = ulong.MaxValue
|
|
}
|
|
|
|
private readonly InvalidAccessHandler _invalidAccessHandler;
|
|
private readonly bool _unsafeMode;
|
|
|
|
private readonly MemoryBlock _addressSpace;
|
|
private readonly MemoryBlock _addressSpaceMirror;
|
|
private readonly ulong _addressSpaceSize;
|
|
|
|
private readonly MemoryBlock _backingMemory;
|
|
private readonly MappingTree _mappingTree;
|
|
|
|
private readonly MemoryEhMeilleure _memoryEh;
|
|
|
|
private readonly ulong[] _pageBitmap;
|
|
|
|
public int AddressSpaceBits { get; }
|
|
|
|
public IntPtr PageTablePointer => _addressSpace.Pointer;
|
|
|
|
public MemoryManagerType Type => _unsafeMode ? MemoryManagerType.HostMappedUnsafe : MemoryManagerType.HostMapped;
|
|
|
|
public MemoryTracking Tracking { get; }
|
|
|
|
public event Action<ulong, ulong> UnmapEvent;
|
|
|
|
/// <summary>
|
|
/// Creates a new instance of the host mapped 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>
|
|
/// <param name="unsafeMode">True if unmanaged access should not be masked (unsafe), false otherwise.</param>
|
|
/// <param name="invalidAccessHandler">Optional function to handle invalid memory accesses</param>
|
|
public MemoryManagerHostMapped(MemoryBlock backingMemory, ulong addressSpaceSize, bool unsafeMode, InvalidAccessHandler invalidAccessHandler = null)
|
|
{
|
|
_backingMemory = backingMemory;
|
|
_invalidAccessHandler = invalidAccessHandler;
|
|
_unsafeMode = unsafeMode;
|
|
_addressSpaceSize = addressSpaceSize;
|
|
|
|
ulong asSize = PageSize;
|
|
int asBits = PageBits;
|
|
|
|
while (asSize < addressSpaceSize)
|
|
{
|
|
asSize <<= 1;
|
|
asBits++;
|
|
}
|
|
|
|
AddressSpaceBits = asBits;
|
|
|
|
_mappingTree = new MappingTree(asSize);
|
|
|
|
_pageBitmap = new ulong[1 << (AddressSpaceBits - (PageBits + PageToPteShift))];
|
|
|
|
MemoryAllocationFlags asFlags = MemoryAllocationFlags.Reserve | MemoryAllocationFlags.ViewCompatible;
|
|
|
|
_addressSpace = new MemoryBlock(asSize, asFlags);
|
|
_addressSpaceMirror = new MemoryBlock(asSize, asFlags);
|
|
|
|
Tracking = new MemoryTracking(this, PageSize, invalidAccessHandler);
|
|
_memoryEh = new MemoryEhMeilleure(_addressSpace, _addressSpaceMirror, Tracking);
|
|
}
|
|
|
|
/// <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>
|
|
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($"va=0x{va:X16}, size=0x{size:X16}");
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Ensures the combination of virtual address and size is part of the addressable space and fully mapped.
|
|
/// </summary>
|
|
/// <param name="va">Virtual address of the range</param>
|
|
/// <param name="size">Size of the range in bytes</param>
|
|
private void AssertMapped(ulong va, ulong size)
|
|
{
|
|
if (!ValidateAddressAndSize(va, size) || !IsRangeMappedImpl(va, size))
|
|
{
|
|
throw new InvalidMemoryRegionException($"Not mapped: va=0x{va:X16}, size=0x{size:X16}");
|
|
}
|
|
}
|
|
|
|
/// <inheritdoc/>
|
|
public void Map(ulong va, ulong pa, ulong size)
|
|
{
|
|
AssertValidAddressAndSize(va, size);
|
|
|
|
_addressSpace.MapView(_backingMemory, pa, va, size);
|
|
AddMapping(va, size);
|
|
_mappingTree.Map(va, pa, size);
|
|
|
|
Tracking.Map(va, size);
|
|
}
|
|
|
|
/// <inheritdoc/>
|
|
public void Unmap(ulong va, ulong size)
|
|
{
|
|
AssertValidAddressAndSize(va, size);
|
|
|
|
UnmapEvent?.Invoke(va, size);
|
|
Tracking.Unmap(va, size);
|
|
|
|
RemoveMapping(va, size);
|
|
_mappingTree.Unmap(va, size);
|
|
_addressSpace.UnmapView(_backingMemory, va, size);
|
|
_addressSpaceMirror.UnmapView(_backingMemory, va, size);
|
|
}
|
|
|
|
/// <inheritdoc/>
|
|
public T Read<T>(ulong va) where T : unmanaged
|
|
{
|
|
try
|
|
{
|
|
AssertMapped(va, (ulong)Unsafe.SizeOf<T>());
|
|
|
|
(MemoryBlock block, ulong offset) = GetContiguousBlock(va, (ulong)Unsafe.SizeOf<T>());
|
|
return block.Read<T>(offset);
|
|
}
|
|
catch (InvalidMemoryRegionException)
|
|
{
|
|
if (_invalidAccessHandler == null || !_invalidAccessHandler(va))
|
|
{
|
|
throw;
|
|
}
|
|
|
|
return default;
|
|
}
|
|
}
|
|
|
|
/// <inheritdoc/>
|
|
public T ReadTracked<T>(ulong va) where T : unmanaged
|
|
{
|
|
try
|
|
{
|
|
SignalMemoryTracking(va, (ulong)Unsafe.SizeOf<T>(), false);
|
|
|
|
return Read<T>(va);
|
|
}
|
|
catch (InvalidMemoryRegionException)
|
|
{
|
|
if (_invalidAccessHandler == null || !_invalidAccessHandler(va))
|
|
{
|
|
throw;
|
|
}
|
|
|
|
return default;
|
|
}
|
|
}
|
|
|
|
/// <inheritdoc/>
|
|
public void Read(ulong va, Span<byte> data)
|
|
{
|
|
try
|
|
{
|
|
AssertMapped(va, (ulong)data.Length);
|
|
|
|
(MemoryBlock block, ulong offset) = GetContiguousBlock(va, (ulong)data.Length);
|
|
block.Read(offset, data);
|
|
}
|
|
catch (InvalidMemoryRegionException)
|
|
{
|
|
if (_invalidAccessHandler == null || !_invalidAccessHandler(va))
|
|
{
|
|
throw;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/// <inheritdoc/>
|
|
public void Write<T>(ulong va, T value) where T : unmanaged
|
|
{
|
|
try
|
|
{
|
|
SignalMemoryTracking(va, (ulong)Unsafe.SizeOf<T>(), write: true);
|
|
|
|
(MemoryBlock block, ulong offset) = GetContiguousBlock(va, (ulong)Unsafe.SizeOf<T>());
|
|
block.Write(offset, value);
|
|
}
|
|
catch (InvalidMemoryRegionException)
|
|
{
|
|
if (_invalidAccessHandler == null || !_invalidAccessHandler(va))
|
|
{
|
|
throw;
|
|
}
|
|
}
|
|
}
|
|
|
|
/// <inheritdoc/>
|
|
public void Write(ulong va, ReadOnlySpan<byte> data)
|
|
{
|
|
try
|
|
{
|
|
SignalMemoryTracking(va, (ulong)data.Length, write: true);
|
|
|
|
(MemoryBlock block, ulong offset) = GetContiguousBlock(va, (ulong)data.Length);
|
|
block.Write(offset, data);
|
|
}
|
|
catch (InvalidMemoryRegionException)
|
|
{
|
|
if (_invalidAccessHandler == null || !_invalidAccessHandler(va))
|
|
{
|
|
throw;
|
|
}
|
|
}
|
|
}
|
|
|
|
/// <inheritdoc/>
|
|
public void WriteUntracked(ulong va, ReadOnlySpan<byte> data)
|
|
{
|
|
try
|
|
{
|
|
AssertMapped(va, (ulong)data.Length);
|
|
|
|
(MemoryBlock block, ulong offset) = GetContiguousBlock(va, (ulong)data.Length);
|
|
block.Write(offset, data);
|
|
}
|
|
catch (InvalidMemoryRegionException)
|
|
{
|
|
if (_invalidAccessHandler == null || !_invalidAccessHandler(va))
|
|
{
|
|
throw;
|
|
}
|
|
}
|
|
}
|
|
|
|
/// <inheritdoc/>
|
|
public ReadOnlySpan<byte> GetSpan(ulong va, int size, bool tracked = false)
|
|
{
|
|
if (tracked)
|
|
{
|
|
SignalMemoryTracking(va, (ulong)size, write: false);
|
|
}
|
|
else
|
|
{
|
|
AssertMapped(va, (ulong)size);
|
|
}
|
|
|
|
(MemoryBlock block, ulong offset) = GetContiguousBlock(va, (ulong)size);
|
|
return block.GetSpan(offset, size);
|
|
}
|
|
|
|
/// <inheritdoc/>
|
|
public WritableRegion GetWritableRegion(ulong va, int size, bool tracked = false)
|
|
{
|
|
if (tracked)
|
|
{
|
|
SignalMemoryTracking(va, (ulong)size, true);
|
|
}
|
|
else
|
|
{
|
|
AssertMapped(va, (ulong)size);
|
|
}
|
|
|
|
(MemoryBlock block, ulong offset) = GetContiguousBlock(va, (ulong)size);
|
|
return block.GetWritableRegion(offset, size);
|
|
}
|
|
|
|
/// <inheritdoc/>
|
|
public ref T GetRef<T>(ulong va) where T : unmanaged
|
|
{
|
|
SignalMemoryTracking(va, (ulong)Unsafe.SizeOf<T>(), true);
|
|
|
|
(MemoryBlock block, ulong offset) = GetContiguousBlock(va, (ulong)Unsafe.SizeOf<T>());
|
|
return ref block.GetRef<T>(offset);
|
|
}
|
|
|
|
/// <inheritdoc/>
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
public bool IsMapped(ulong va)
|
|
{
|
|
return ValidateAddress(va) && IsMappedImpl(va);
|
|
}
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
private bool IsMappedImpl(ulong va)
|
|
{
|
|
ulong page = va >> PageBits;
|
|
|
|
int bit = (int)((page & 31) << 1);
|
|
|
|
int pageIndex = (int)(page >> PageToPteShift);
|
|
ref ulong pageRef = ref _pageBitmap[pageIndex];
|
|
|
|
ulong pte = Volatile.Read(ref pageRef);
|
|
|
|
return ((pte >> bit) & 3) != 0;
|
|
}
|
|
|
|
/// <inheritdoc/>
|
|
public bool IsRangeMapped(ulong va, ulong size)
|
|
{
|
|
AssertValidAddressAndSize(va, size);
|
|
|
|
return IsRangeMappedImpl(va, size);
|
|
}
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
private void GetPageBlockRange(ulong pageStart, ulong pageEnd, out ulong startMask, out ulong endMask, out int pageIndex, out int pageEndIndex)
|
|
{
|
|
startMask = ulong.MaxValue << ((int)(pageStart & 31) << 1);
|
|
endMask = ulong.MaxValue >> (64 - ((int)(pageEnd & 31) << 1));
|
|
|
|
pageIndex = (int)(pageStart >> PageToPteShift);
|
|
pageEndIndex = (int)((pageEnd - 1) >> PageToPteShift);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
/// <inheritdoc/>
|
|
public IEnumerable<MemoryRange> GetPhysicalRegions(ulong va, ulong size)
|
|
{
|
|
return _mappingTree.GetPhysicalRegions(va, size);
|
|
}
|
|
|
|
/// <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.Reprotect(va, size, protection, false);
|
|
}
|
|
|
|
/// <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));
|
|
}
|
|
|
|
private (MemoryBlock, ulong) GetContiguousBlock(ulong va, ulong size)
|
|
{
|
|
return _mappingTree.GetContiguousBlock(_backingMemory, _addressSpaceMirror, va, size);
|
|
}
|
|
|
|
/// <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;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Disposes of resources used by the memory manager.
|
|
/// </summary>
|
|
protected override void Destroy()
|
|
{
|
|
_addressSpace.Dispose();
|
|
_addressSpaceMirror.Dispose();
|
|
_memoryEh.Dispose();
|
|
}
|
|
|
|
private static void ThrowInvalidMemoryRegionException(string message) => throw new InvalidMemoryRegionException(message);
|
|
}
|
|
}
|