Ryujinx/ChocolArm64/Memory/MemoryManager.cs

745 lines
20 KiB
C#
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using ChocolArm64.Events;
using ChocolArm64.Exceptions;
using ChocolArm64.State;
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Runtime.Intrinsics;
using System.Runtime.Intrinsics.X86;
using System.Threading;
namespace ChocolArm64.Memory
{
public unsafe class MemoryManager : IMemory, IDisposable
{
private const int PtLvl0Bits = 13;
private const int PtLvl1Bits = 14;
private const int PtPageBits = 12;
private const int PtLvl0Size = 1 << PtLvl0Bits;
private const int PtLvl1Size = 1 << PtLvl1Bits;
public const int PageSize = 1 << PtPageBits;
private const int PtLvl0Mask = PtLvl0Size - 1;
private const int PtLvl1Mask = PtLvl1Size - 1;
public const int PageMask = PageSize - 1;
private const int PtLvl0Bit = PtPageBits + PtLvl1Bits;
private const int PtLvl1Bit = PtPageBits;
private const long ErgMask = (4 << CpuThreadState.ErgSizeLog2) - 1;
private class ArmMonitor
{
public long Position;
public bool ExState;
public bool HasExclusiveAccess(long position)
{
return Position == position && ExState;
}
}
private Dictionary<int, ArmMonitor> _monitors;
private ConcurrentDictionary<long, IntPtr> _observedPages;
public IntPtr Ram { get; private set; }
private byte* _ramPtr;
private byte*** _pageTable;
public event EventHandler<InvalidAccessEventArgs> InvalidAccess;
public MemoryManager(IntPtr ram)
{
_monitors = new Dictionary<int, ArmMonitor>();
_observedPages = new ConcurrentDictionary<long, IntPtr>();
Ram = ram;
_ramPtr = (byte*)ram;
_pageTable = (byte***)Marshal.AllocHGlobal(PtLvl0Size * IntPtr.Size);
for (int l0 = 0; l0 < PtLvl0Size; l0++)
{
_pageTable[l0] = null;
}
}
public void RemoveMonitor(int core)
{
lock (_monitors)
{
ClearExclusive(core);
_monitors.Remove(core);
}
}
public void SetExclusive(int core, long position)
{
position &= ~ErgMask;
lock (_monitors)
{
foreach (ArmMonitor mon in _monitors.Values)
{
if (mon.Position == position && mon.ExState)
{
mon.ExState = false;
}
}
if (!_monitors.TryGetValue(core, out ArmMonitor threadMon))
{
threadMon = new ArmMonitor();
_monitors.Add(core, threadMon);
}
threadMon.Position = position;
threadMon.ExState = true;
}
}
public bool TestExclusive(int core, long position)
{
//Note: Any call to this method also should be followed by a
//call to ClearExclusiveForStore if this method returns true.
position &= ~ErgMask;
Monitor.Enter(_monitors);
if (!_monitors.TryGetValue(core, out ArmMonitor threadMon))
{
return false;
}
bool exState = threadMon.HasExclusiveAccess(position);
if (!exState)
{
Monitor.Exit(_monitors);
}
return exState;
}
public void ClearExclusiveForStore(int core)
{
if (_monitors.TryGetValue(core, out ArmMonitor threadMon))
{
threadMon.ExState = false;
}
Monitor.Exit(_monitors);
}
public void ClearExclusive(int core)
{
lock (_monitors)
{
if (_monitors.TryGetValue(core, out ArmMonitor threadMon))
{
threadMon.ExState = false;
}
}
}
public void WriteInt32ToSharedAddr(long position, int value)
{
long maskedPosition = position & ~ErgMask;
lock (_monitors)
{
foreach (ArmMonitor mon in _monitors.Values)
{
if (mon.Position == maskedPosition && mon.ExState)
{
mon.ExState = false;
}
}
WriteInt32(position, value);
}
}
public sbyte ReadSByte(long position)
{
return (sbyte)ReadByte(position);
}
public short ReadInt16(long position)
{
return (short)ReadUInt16(position);
}
public int ReadInt32(long position)
{
return (int)ReadUInt32(position);
}
public long ReadInt64(long position)
{
return (long)ReadUInt64(position);
}
public byte ReadByte(long position)
{
return *((byte*)Translate(position));
}
public ushort ReadUInt16(long position)
{
return *((ushort*)Translate(position));
}
public uint ReadUInt32(long position)
{
return *((uint*)Translate(position));
}
public ulong ReadUInt64(long position)
{
return *((ulong*)Translate(position));
}
public Vector128<float> ReadVector8(long position)
{
if (Sse2.IsSupported)
{
return Sse.StaticCast<byte, float>(Sse2.SetVector128(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, ReadByte(position)));
}
else
{
throw new PlatformNotSupportedException();
}
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public Vector128<float> ReadVector16(long position)
{
if (Sse2.IsSupported)
{
return Sse.StaticCast<ushort, float>(Sse2.Insert(Sse2.SetZeroVector128<ushort>(), ReadUInt16(position), 0));
}
else
{
throw new PlatformNotSupportedException();
}
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public Vector128<float> ReadVector32(long position)
{
if (Sse.IsSupported)
{
return Sse.LoadScalarVector128((float*)Translate(position));
}
else
{
throw new PlatformNotSupportedException();
}
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public Vector128<float> ReadVector64(long position)
{
if (Sse2.IsSupported)
{
return Sse.StaticCast<double, float>(Sse2.LoadScalarVector128((double*)Translate(position)));
}
else
{
throw new PlatformNotSupportedException();
}
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public Vector128<float> ReadVector128(long position)
{
if (Sse.IsSupported)
{
return Sse.LoadVector128((float*)Translate(position));
}
else
{
throw new PlatformNotSupportedException();
}
}
public byte[] ReadBytes(long position, long size)
{
if ((uint)size > int.MaxValue)
{
throw new ArgumentOutOfRangeException(nameof(size));
}
EnsureRangeIsValid(position, size);
byte[] data = new byte[size];
Marshal.Copy((IntPtr)Translate(position), data, 0, (int)size);
return data;
}
public void ReadBytes(long position, byte[] data, int startIndex, int size)
{
//Note: This will be moved later.
EnsureRangeIsValid(position, (uint)size);
Marshal.Copy((IntPtr)Translate(position), data, startIndex, size);
}
public void WriteSByte(long position, sbyte value)
{
WriteByte(position, (byte)value);
}
public void WriteInt16(long position, short value)
{
WriteUInt16(position, (ushort)value);
}
public void WriteInt32(long position, int value)
{
WriteUInt32(position, (uint)value);
}
public void WriteInt64(long position, long value)
{
WriteUInt64(position, (ulong)value);
}
public void WriteByte(long position, byte value)
{
*((byte*)TranslateWrite(position)) = value;
}
public void WriteUInt16(long position, ushort value)
{
*((ushort*)TranslateWrite(position)) = value;
}
public void WriteUInt32(long position, uint value)
{
*((uint*)TranslateWrite(position)) = value;
}
public void WriteUInt64(long position, ulong value)
{
*((ulong*)TranslateWrite(position)) = value;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public void WriteVector8(long position, Vector128<float> value)
{
if (Sse41.IsSupported)
{
WriteByte(position, Sse41.Extract(Sse.StaticCast<float, byte>(value), 0));
}
else if (Sse2.IsSupported)
{
WriteByte(position, (byte)Sse2.Extract(Sse.StaticCast<float, ushort>(value), 0));
}
else
{
throw new PlatformNotSupportedException();
}
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public void WriteVector16(long position, Vector128<float> value)
{
if (Sse2.IsSupported)
{
WriteUInt16(position, Sse2.Extract(Sse.StaticCast<float, ushort>(value), 0));
}
else
{
throw new PlatformNotSupportedException();
}
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public void WriteVector32(long position, Vector128<float> value)
{
if (Sse.IsSupported)
{
Sse.StoreScalar((float*)TranslateWrite(position), value);
}
else
{
throw new PlatformNotSupportedException();
}
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public void WriteVector64(long position, Vector128<float> value)
{
if (Sse2.IsSupported)
{
Sse2.StoreScalar((double*)TranslateWrite(position), Sse.StaticCast<float, double>(value));
}
else
{
throw new PlatformNotSupportedException();
}
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public void WriteVector128(long position, Vector128<float> value)
{
if (Sse.IsSupported)
{
Sse.Store((float*)TranslateWrite(position), value);
}
else
{
throw new PlatformNotSupportedException();
}
}
public void WriteBytes(long position, byte[] data)
{
EnsureRangeIsValid(position, (uint)data.Length);
Marshal.Copy(data, 0, (IntPtr)TranslateWrite(position), data.Length);
}
public void WriteBytes(long position, byte[] data, int startIndex, int size)
{
//Note: This will be moved later.
//Using Translate instead of TranslateWrite is on purpose.
EnsureRangeIsValid(position, (uint)size);
Marshal.Copy(data, startIndex, (IntPtr)Translate(position), size);
}
public void CopyBytes(long src, long dst, long size)
{
//Note: This will be moved later.
EnsureRangeIsValid(src, size);
EnsureRangeIsValid(dst, size);
byte* srcPtr = Translate(src);
byte* dstPtr = TranslateWrite(dst);
Buffer.MemoryCopy(srcPtr, dstPtr, size, size);
}
public void Map(long va, long pa, long size)
{
SetPtEntries(va, _ramPtr + pa, size);
}
public void Unmap(long position, long size)
{
SetPtEntries(position, null, size);
StopObservingRegion(position, size);
}
public bool IsMapped(long position)
{
if (!(IsValidPosition(position)))
{
return false;
}
long l0 = (position >> PtLvl0Bit) & PtLvl0Mask;
long l1 = (position >> PtLvl1Bit) & PtLvl1Mask;
if (_pageTable[l0] == null)
{
return false;
}
return _pageTable[l0][l1] != null || _observedPages.ContainsKey(position >> PtPageBits);
}
public long GetPhysicalAddress(long virtualAddress)
{
byte* ptr = Translate(virtualAddress);
return (long)(ptr - _ramPtr);
}
internal byte* Translate(long position)
{
long l0 = (position >> PtLvl0Bit) & PtLvl0Mask;
long l1 = (position >> PtLvl1Bit) & PtLvl1Mask;
long old = position;
byte** lvl1 = _pageTable[l0];
if ((position >> (PtLvl0Bit + PtLvl0Bits)) != 0)
{
goto Unmapped;
}
if (lvl1 == null)
{
goto Unmapped;
}
position &= PageMask;
byte* ptr = lvl1[l1];
if (ptr == null)
{
goto Unmapped;
}
return ptr + position;
Unmapped:
return HandleNullPte(old);
}
private byte* HandleNullPte(long position)
{
long key = position >> PtPageBits;
if (_observedPages.TryGetValue(key, out IntPtr ptr))
{
return (byte*)ptr + (position & PageMask);
}
InvalidAccess?.Invoke(this, new InvalidAccessEventArgs(position));
throw new VmmPageFaultException(position);
}
internal byte* TranslateWrite(long position)
{
long l0 = (position >> PtLvl0Bit) & PtLvl0Mask;
long l1 = (position >> PtLvl1Bit) & PtLvl1Mask;
long old = position;
byte** lvl1 = _pageTable[l0];
if ((position >> (PtLvl0Bit + PtLvl0Bits)) != 0)
{
goto Unmapped;
}
if (lvl1 == null)
{
goto Unmapped;
}
position &= PageMask;
byte* ptr = lvl1[l1];
if (ptr == null)
{
goto Unmapped;
}
return ptr + position;
Unmapped:
return HandleNullPteWrite(old);
}
private byte* HandleNullPteWrite(long position)
{
long key = position >> PtPageBits;
if (_observedPages.TryGetValue(key, out IntPtr ptr))
{
SetPtEntry(position, (byte*)ptr);
return (byte*)ptr + (position & PageMask);
}
InvalidAccess?.Invoke(this, new InvalidAccessEventArgs(position));
throw new VmmPageFaultException(position);
}
private void SetPtEntries(long va, byte* ptr, long size)
{
long endPosition = (va + size + PageMask) & ~PageMask;
while ((ulong)va < (ulong)endPosition)
{
SetPtEntry(va, ptr);
va += PageSize;
if (ptr != null)
{
ptr += PageSize;
}
}
}
private void SetPtEntry(long position, byte* ptr)
{
if (!IsValidPosition(position))
{
throw new ArgumentOutOfRangeException(nameof(position));
}
long l0 = (position >> PtLvl0Bit) & PtLvl0Mask;
long l1 = (position >> PtLvl1Bit) & PtLvl1Mask;
if (_pageTable[l0] == null)
{
byte** lvl1 = (byte**)Marshal.AllocHGlobal(PtLvl1Size * IntPtr.Size);
for (int zl1 = 0; zl1 < PtLvl1Size; zl1++)
{
lvl1[zl1] = null;
}
Thread.MemoryBarrier();
_pageTable[l0] = lvl1;
}
_pageTable[l0][l1] = ptr;
}
public (bool[], int) IsRegionModified(long position, long size)
{
long endPosition = (position + size + PageMask) & ~PageMask;
position &= ~PageMask;
size = endPosition - position;
bool[] modified = new bool[size >> PtPageBits];
int count = 0;
lock (_observedPages)
{
for (int page = 0; page < modified.Length; page++)
{
byte* ptr = Translate(position);
if (_observedPages.TryAdd(position >> PtPageBits, (IntPtr)ptr))
{
modified[page] = true;
count++;
}
else
{
long l0 = (position >> PtLvl0Bit) & PtLvl0Mask;
long l1 = (position >> PtLvl1Bit) & PtLvl1Mask;
byte** lvl1 = _pageTable[l0];
if (lvl1 != null)
{
if (modified[page] = lvl1[l1] != null)
{
count++;
}
}
}
SetPtEntry(position, null);
position += PageSize;
}
}
return (modified, count);
}
public void StopObservingRegion(long position, long size)
{
long endPosition = (position + size + PageMask) & ~PageMask;
while (position < endPosition)
{
lock (_observedPages)
{
if (_observedPages.TryRemove(position >> PtPageBits, out IntPtr ptr))
{
SetPtEntry(position, (byte*)ptr);
}
}
position += PageSize;
}
}
public IntPtr GetHostAddress(long position, long size)
{
EnsureRangeIsValid(position, size);
return (IntPtr)Translate(position);
}
internal void EnsureRangeIsValid(long position, long size)
{
long endPos = position + size;
position &= ~PageMask;
long expectedPa = GetPhysicalAddress(position);
while ((ulong)position < (ulong)endPos)
{
long pa = GetPhysicalAddress(position);
if (pa != expectedPa)
{
throw new VmmAccessException(position, size);
}
position += PageSize;
expectedPa += PageSize;
}
}
public bool IsValidPosition(long position)
{
return position >> (PtLvl0Bits + PtLvl1Bits + PtPageBits) == 0;
}
public void Dispose()
{
Dispose(true);
}
protected virtual void Dispose(bool disposing)
{
if (_pageTable == null)
{
return;
}
for (int l0 = 0; l0 < PtLvl0Size; l0++)
{
if (_pageTable[l0] != null)
{
Marshal.FreeHGlobal((IntPtr)_pageTable[l0]);
}
_pageTable[l0] = null;
}
Marshal.FreeHGlobal((IntPtr)_pageTable);
_pageTable = null;
}
}
}