Revert address space mirror changes

Ryujinx.Cpu/Jit/MappingTree.cs

@@ -1,328 +0,0 @@
-using Ryujinx.Common.Collections;
-using Ryujinx.Memory;
-using Ryujinx.Memory.Range;
-using System;
-using System.Collections.Generic;
-using System.Threading;
-
-namespace Ryujinx.Cpu.Jit
-{
-    class MappingTree
-    {
-        private const ulong PageSize = 0x1000;
-
-        private enum MappingState : byte
-        {
-            Unmapped,
-            Mapped,
-            MappedWithMirror
-        }
-
-        private class Mapping : IntrusiveRedBlackTreeNode<Mapping>, IComparable<Mapping>
-        {
-            public ulong Address { get; private set; }
-            public ulong Size { get; private set; }
-            public ulong EndAddress => Address + Size;
-            public ulong BackingOffset { get; private set; }
-            public MappingState State { get; private set; }
-
-            public Mapping(ulong address, ulong size, ulong backingOffset, MappingState state)
-            {
-                Address = address;
-                Size = size;
-                BackingOffset = backingOffset;
-                State = state;
-            }
-
-            public Mapping Split(ulong splitAddress)
-            {
-                ulong leftSize = splitAddress - Address;
-                ulong rightSize = EndAddress - splitAddress;
-
-                Mapping left = new Mapping(Address, leftSize, BackingOffset, State);
-
-                Address = splitAddress;
-                Size = rightSize;
-
-                if (State != MappingState.Unmapped)
-                {
-                    BackingOffset += leftSize;
-                }
-
-                return left;
-            }
-
-            public void UpdateState(ulong newBackingOffset, MappingState newState)
-            {
-                BackingOffset = newBackingOffset;
-                State = newState;
-            }
-
-            public void Extend(ulong sizeDelta)
-            {
-                Size += sizeDelta;
-            }
-
-            public int CompareTo(Mapping other)
-            {
-                if (Address < other.Address)
-                {
-                    return -1;
-                }
-                else if (Address <= other.EndAddress - 1UL)
-                {
-                    return 0;
-                }
-                else
-                {
-                    return 1;
-                }
-            }
-        }
-
-        private readonly IntrusiveRedBlackTree<Mapping> _tree;
-        private readonly ReaderWriterLock _treeLock;
-
-        public MappingTree(ulong addressSpaceSize)
-        {
-            _tree = new IntrusiveRedBlackTree<Mapping>();
-            _treeLock = new ReaderWriterLock();
-
-            _tree.Add(new Mapping(0UL, addressSpaceSize, 0UL, MappingState.Unmapped));
-        }
-
-        public void Map(ulong va, ulong pa, ulong size)
-        {
-            _treeLock.AcquireWriterLock(Timeout.Infinite);
-            Update(va, pa, size, MappingState.Mapped);
-            _treeLock.ReleaseWriterLock();
-        }
-
-        public void Unmap(ulong va, ulong size)
-        {
-            _treeLock.AcquireWriterLock(Timeout.Infinite);
-            Update(va, 0UL, size, MappingState.Unmapped);
-            _treeLock.ReleaseWriterLock();
-        }
-
-        public IEnumerable<MemoryRange> GetPhysicalRegions(ulong va, ulong size)
-        {
-            _treeLock.AcquireReaderLock(Timeout.Infinite);
-            var regions = GetPhysicalRegionsImpl(va, size);
-            _treeLock.ReleaseReaderLock();
-
-            return regions;
-        }
-
-        public (MemoryBlock, ulong) GetContiguousBlock(MemoryBlock backingMemory, MemoryBlock mirror, ulong va, ulong size)
-        {
-            _treeLock.AcquireReaderLock(Timeout.Infinite);
-            var result = GetContiguousBlockImpl(backingMemory, mirror, va, size);
-            _treeLock.ReleaseReaderLock();
-
-            return result;
-        }
-
-        private void Update(ulong va, ulong pa, ulong size, MappingState state)
-        {
-            Mapping map = _tree.GetNode(new Mapping(va, 1UL, 0UL, MappingState.Unmapped));
-
-            Update(map, va, pa, size, state);
-        }
-
-        private Mapping Update(Mapping map, ulong va, ulong pa, ulong size, MappingState state)
-        {
-            ulong endAddress = va + size;
-
-            for (; map != null; map = map.Successor)
-            {
-                if (map.Address < va)
-                {
-                    _tree.Add(map.Split(va));
-                }
-
-                if (map.EndAddress > endAddress)
-                {
-                    Mapping newMap = map.Split(endAddress);
-                    _tree.Add(newMap);
-                    map = newMap;
-                }
-
-                map.UpdateState(pa, state);
-                map = TryCoalesce(map);
-
-                if (map.EndAddress >= endAddress)
-                {
-                    break;
-                }
-            }
-
-            return map;
-        }
-
-        private Mapping TryCoalesce(Mapping map)
-        {
-            Mapping previousMap = map.Predecessor;
-            Mapping nextMap = map.Successor;
-
-            if (previousMap != null && CanCoalesce(previousMap, map))
-            {
-                previousMap.Extend(map.Size);
-                _tree.Remove(map);
-                map = previousMap;
-            }
-
-            if (nextMap != null && CanCoalesce(map, nextMap))
-            {
-                map.Extend(nextMap.Size);
-                _tree.Remove(nextMap);
-            }
-
-            return map;
-        }
-
-        private static bool CanCoalesce(Mapping left, Mapping right)
-        {
-            if (left.State != right.State)
-            {
-                return false;
-            }
-
-            return left.State == MappingState.Unmapped || (left.BackingOffset + left.Size == right.BackingOffset);
-        }
-
-        private IEnumerable<MemoryRange> GetPhysicalRegionsImpl(ulong va, ulong size)
-        {
-            Mapping map = _tree.GetNode(new Mapping(va, 1UL, 0UL, MappingState.Unmapped));
-
-            if (map == null)
-            {
-                ThrowInvalidMemoryRegionException($"Not mapped: va=0x{va:X16}, size=0x{size:X16}");
-            }
-
-            var regions = new List<MemoryRange>();
-
-            ulong endAddress = va + size;
-            ulong regionStart = 0;
-            ulong regionSize = 0;
-
-            for (; map != null; map = map.Successor)
-            {
-                if (map.State == MappingState.Unmapped)
-                {
-                    ThrowInvalidMemoryRegionException($"Not mapped: va=0x{va:X16}, size=0x{size:X16}");
-                }
-
-                ulong clampedAddress = Math.Max(map.Address, va);
-                ulong clampedEndAddress = Math.Min(map.EndAddress, endAddress);
-                ulong clampedSize = clampedEndAddress - clampedAddress;
-
-                ulong pa = map.BackingOffset + (clampedAddress - map.Address);
-
-                if (pa != regionStart + regionSize)
-                {
-                    if (regionSize != 0)
-                    {
-                        regions.Add(new MemoryRange(regionStart, regionSize));
-                    }
-
-                    regionStart = pa;
-                    regionSize = clampedSize;
-                }
-                else
-                {
-                    regionSize += clampedSize;
-                }
-
-                if (map.EndAddress >= endAddress)
-                {
-                    break;
-                }
-            }
-
-            if (regionSize != 0)
-            {
-                regions.Add(new MemoryRange(regionStart, regionSize));
-            }
-
-            return regions;
-        }
-
-        private (MemoryBlock, ulong) GetContiguousBlockImpl(MemoryBlock backingMemory, MemoryBlock mirror, ulong va, ulong size)
-        {
-            Mapping map = _tree.GetNode(new Mapping(va, 1UL, 0UL, MappingState.Unmapped));
-
-            ulong endAddress = va + size;
-
-            if (map != null && map.Address <= va && map.EndAddress >= endAddress)
-            {
-                ulong pa = map.BackingOffset + (va - map.Address);
-                return (backingMemory, pa);
-            }
-
-            if (map != null)
-            {
-                Mapping firstMap = map;
-
-                bool contiguous = true;
-                ulong expectedPa = map.BackingOffset + map.Size;
-
-                while ((map = map.Successor) != null && map.Address < endAddress)
-                {
-                    if (map.State == MappingState.Unmapped || map.BackingOffset != expectedPa)
-                    {
-                        contiguous = false;
-                        break;
-                    }
-
-                    if (map.EndAddress >= endAddress)
-                    {
-                        break;
-                    }
-
-                    expectedPa = map.BackingOffset + map.Size;
-                }
-
-                if (contiguous && map != null)
-                {
-                    ulong pa = firstMap.BackingOffset + (va - firstMap.Address);
-                    return (backingMemory, pa);
-                }
-
-                map = firstMap;
-            }
-
-            ulong endVaAligned = (endAddress + PageSize - 1) & ~(PageSize - 1);
-            ulong vaAligned = va & ~(PageSize - 1);
-
-            // Make sure the range that will be accessed on the mirror is fully mapped.
-            for (; map != null; map = map.Successor)
-            {
-                if (map.State == MappingState.Mapped)
-                {
-                    ulong clampedAddress = Math.Max(map.Address, vaAligned);
-                    ulong clampedEndAddress = Math.Min(map.EndAddress, endVaAligned);
-                    ulong clampedSize = clampedEndAddress - clampedAddress;
-                    ulong backingOffset = map.BackingOffset + (clampedAddress - map.Address);
-
-                    LockCookie lockCookie = _treeLock.UpgradeToWriterLock(Timeout.Infinite);
-
-                    mirror.MapView(backingMemory, backingOffset, clampedAddress, clampedSize);
-
-                    map = Update(map, clampedAddress, backingOffset, clampedSize, MappingState.MappedWithMirror);
-
-                    _treeLock.DowngradeFromWriterLock(ref lockCookie);
-                }
-
-                if (map.EndAddress >= endAddress)
-                {
-                    break;
-                }
-            }
-
-            return (mirror, va);
-        }
-
-        private static void ThrowInvalidMemoryRegionException(string message) => throw new InvalidMemoryRegionException(message);
-    }
-}

Ryujinx.Cpu/Jit/MemoryManagerHostMapped.cs

@@ -42,7 +42,7 @@ namespace Ryujinx.Cpu.Jit
         private readonly ulong _addressSpaceSize;
 
         private readonly MemoryBlock _backingMemory;
-        private readonly MappingTree _mappingTree;
+        private readonly PageTable<ulong> _pageTable;
 
         private readonly MemoryEhMeilleure _memoryEh;
 
@@ -68,6 +68,7 @@ namespace Ryujinx.Cpu.Jit
         public MemoryManagerHostMapped(MemoryBlock backingMemory, ulong addressSpaceSize, bool unsafeMode, InvalidAccessHandler invalidAccessHandler = null)
         {
             _backingMemory = backingMemory;
+            _pageTable = new PageTable<ulong>();
             _invalidAccessHandler = invalidAccessHandler;
             _unsafeMode = unsafeMode;
             _addressSpaceSize = addressSpaceSize;
@@ -83,8 +84,6 @@ namespace Ryujinx.Cpu.Jit
 
             AddressSpaceBits = asBits;
 
-            _mappingTree = new MappingTree(asSize);
-
             _pageBitmap = new ulong[1 << (AddressSpaceBits - (PageBits + PageToPteShift))];
 
             MemoryAllocationFlags asFlags = MemoryAllocationFlags.Reserve | MemoryAllocationFlags.ViewCompatible;
@@ -151,8 +150,9 @@ namespace Ryujinx.Cpu.Jit
             AssertValidAddressAndSize(va, size);
 
             _addressSpace.MapView(_backingMemory, pa, va, size);
+            _addressSpaceMirror.MapView(_backingMemory, pa, va, size);
             AddMapping(va, size);
-            _mappingTree.Map(va, pa, size);
+            PtMap(va, pa, size);
 
             Tracking.Map(va, size);
         }
@@ -166,11 +166,34 @@ namespace Ryujinx.Cpu.Jit
             Tracking.Unmap(va, size);
 
             RemoveMapping(va, size);
-            _mappingTree.Unmap(va, size);
+            PtUnmap(va, size);
             _addressSpace.UnmapView(_backingMemory, va, size);
             _addressSpaceMirror.UnmapView(_backingMemory, va, size);
         }
 
+        private void PtMap(ulong va, ulong pa, ulong size)
+        {
+            while (size != 0)
+            {
+                _pageTable.Map(va, pa);
+
+                va += PageSize;
+                pa += PageSize;
+                size -= PageSize;
+            }
+        }
+
+        private void PtUnmap(ulong va, ulong size)
+        {
+            while (size != 0)
+            {
+                _pageTable.Unmap(va);
+
+                va += PageSize;
+                size -= PageSize;
+            }
+        }
+
         /// <inheritdoc/>
         public T Read<T>(ulong va) where T : unmanaged
         {
@@ -178,8 +201,7 @@ namespace Ryujinx.Cpu.Jit
             {
                 AssertMapped(va, (ulong)Unsafe.SizeOf<T>());
 
-                (MemoryBlock block, ulong offset) = GetContiguousBlock(va, (ulong)Unsafe.SizeOf<T>());
-                return block.Read<T>(offset);
+                return _addressSpaceMirror.Read<T>(va);
             }
             catch (InvalidMemoryRegionException)
             {
@@ -219,8 +241,7 @@ namespace Ryujinx.Cpu.Jit
             {
                 AssertMapped(va, (ulong)data.Length);
 
-                (MemoryBlock block, ulong offset) = GetContiguousBlock(va, (ulong)data.Length);
-                block.Read(offset, data);
+                _addressSpaceMirror.Read(va, data);
             }
             catch (InvalidMemoryRegionException)
             {
@@ -239,8 +260,7 @@ namespace Ryujinx.Cpu.Jit
             {
                 SignalMemoryTracking(va, (ulong)Unsafe.SizeOf<T>(), write: true);
 
-                (MemoryBlock block, ulong offset) = GetContiguousBlock(va, (ulong)Unsafe.SizeOf<T>());
-                block.Write(offset, value);
+                _addressSpaceMirror.Write(va, value);
             }
             catch (InvalidMemoryRegionException)
             {
@@ -258,8 +278,7 @@ namespace Ryujinx.Cpu.Jit
             {
                 SignalMemoryTracking(va, (ulong)data.Length, write: true);
 
-                (MemoryBlock block, ulong offset) = GetContiguousBlock(va, (ulong)data.Length);
-                block.Write(offset, data);
+                _addressSpaceMirror.Write(va, data);
             }
             catch (InvalidMemoryRegionException)
             {
@@ -277,8 +296,7 @@ namespace Ryujinx.Cpu.Jit
             {
                 AssertMapped(va, (ulong)data.Length);
 
-                (MemoryBlock block, ulong offset) = GetContiguousBlock(va, (ulong)data.Length);
-                block.Write(offset, data);
+                _addressSpaceMirror.Write(va, data);
             }
             catch (InvalidMemoryRegionException)
             {
@@ -301,8 +319,7 @@ namespace Ryujinx.Cpu.Jit
                 AssertMapped(va, (ulong)size);
             }
 
-            (MemoryBlock block, ulong offset) = GetContiguousBlock(va, (ulong)size);
-            return block.GetSpan(offset, size);
+            return _addressSpaceMirror.GetSpan(va, size);
         }
 
         /// <inheritdoc/>
@@ -317,8 +334,7 @@ namespace Ryujinx.Cpu.Jit
                 AssertMapped(va, (ulong)size);
             }
 
-            (MemoryBlock block, ulong offset) = GetContiguousBlock(va, (ulong)size);
-            return block.GetWritableRegion(offset, size);
+            return _addressSpaceMirror.GetWritableRegion(va, size);
         }
 
         /// <inheritdoc/>
@@ -326,8 +342,7 @@ namespace Ryujinx.Cpu.Jit
         {
             SignalMemoryTracking(va, (ulong)Unsafe.SizeOf<T>(), true);
 
-            (MemoryBlock block, ulong offset) = GetContiguousBlock(va, (ulong)Unsafe.SizeOf<T>());
-            return ref block.GetRef<T>(offset);
+            return ref _addressSpaceMirror.GetRef<T>(va);
         }
 
         /// <inheritdoc/>
@@ -414,7 +429,51 @@ namespace Ryujinx.Cpu.Jit
         /// <inheritdoc/>
         public IEnumerable<MemoryRange> GetPhysicalRegions(ulong va, ulong size)
         {
-            return _mappingTree.GetPhysicalRegions(va, size);
+            int pages = GetPagesCount(va, (uint)size, out va);
+
+            var regions = new List<MemoryRange>();
+
+            ulong regionStart = GetPhysicalAddressChecked(va);
+            ulong regionSize = PageSize;
+
+            for (int page = 0; page < pages - 1; page++)
+            {
+                if (!ValidateAddress(va + PageSize))
+                {
+                    return null;
+                }
+
+                ulong newPa = GetPhysicalAddressChecked(va + PageSize);
+
+                if (GetPhysicalAddressChecked(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 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);
         }
 
         /// <inheritdoc/>
@@ -626,11 +685,6 @@ namespace Ryujinx.Cpu.Jit
             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>