aloha

Ryujinx/Cpu/Memory/AMemory.cs

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+using ChocolArm64.State;
+using System;
+using System.Collections.Generic;
+
+namespace ChocolArm64.Memory
+{
+    public unsafe class AMemory
+    {
+        public AMemoryMgr Manager { get; private set; }
+
+        private struct ExMonitor
+        {
+            public long Position { get; private set; }
+
+            private bool ExState;
+
+            public ExMonitor(long Position, bool ExState)
+            {
+                this.Position = Position;
+                this.ExState  = ExState;
+            }
+
+            public bool HasExclusiveAccess(long Position)
+            {
+                return this.Position == Position && ExState;
+            }
+
+            public void Reset()
+            {
+                ExState = false;
+            }
+        }
+
+        private Dictionary<int, ExMonitor> Monitors;
+
+        private HashSet<long> ExAddrs;
+
+        private byte* RamPtr;
+
+        public AMemory(IntPtr Ram, AMemoryAlloc Allocator)
+        {
+            Manager = new AMemoryMgr(Allocator);
+
+            Monitors = new Dictionary<int, ExMonitor>();
+
+            ExAddrs = new HashSet<long>();
+
+            RamPtr = (byte*)Ram;
+        }
+
+        public void RemoveMonitor(int ThreadId)
+        {
+            lock (Monitors)
+            {
+                Monitors.Remove(ThreadId);
+            }
+        }
+
+        public void SetExclusive(ARegisters Registers, long Position)
+        {
+            lock (Monitors)
+            {
+                bool ExState = !ExAddrs.Contains(Position);
+
+                if (ExState)
+                {
+                    ExAddrs.Add(Position);
+                }
+
+                ExMonitor Monitor = new ExMonitor(Position, ExState);
+
+                if (!Monitors.TryAdd(Registers.ThreadId, Monitor))
+                {
+                    Monitors[Registers.ThreadId] = Monitor;
+                }
+            }
+        }
+
+        public bool TestExclusive(ARegisters Registers, long Position)
+        {
+            lock (Monitors)
+            {
+                if (!Monitors.TryGetValue(Registers.ThreadId, out ExMonitor Monitor))
+                {
+                    return false;
+                }
+
+                return Monitor.HasExclusiveAccess(Position);
+            }
+        }
+
+        public void ClearExclusive(ARegisters Registers)
+        {
+            lock (Monitors)
+            {
+                if (Monitors.TryGetValue(Registers.ThreadId, out ExMonitor Monitor))
+                {
+                    Monitor.Reset();
+                    ExAddrs.Remove(Monitor.Position);
+                }
+            }
+        }
+
+        public sbyte ReadSByte(long Position) => (sbyte)ReadByte  (Position);
+        public short ReadInt16(long Position) => (short)ReadUInt16(Position);
+        public int   ReadInt32(long Position) =>   (int)ReadUInt32(Position);
+        public long  ReadInt64(long Position) =>  (long)ReadUInt64(Position);
+
+        public byte ReadByte(long Position)
+        {
+            return *((byte*)(RamPtr + Manager.GetPhys(Position, AMemoryPerm.Read)));
+        }
+
+        public ushort ReadUInt16(long Position)
+        {
+            long PhysPos = Manager.GetPhys(Position, AMemoryPerm.Read);
+
+            if (BitConverter.IsLittleEndian && !IsPageCrossed(Position, 2))
+            {
+                return *((ushort*)(RamPtr + PhysPos));
+            }
+            else
+            {
+                return (ushort)(
+                    ReadByte(Position + 0) << 0 |
+                    ReadByte(Position + 1) << 8);
+            }
+        }
+
+        public uint ReadUInt32(long Position)
+        {
+            long PhysPos = Manager.GetPhys(Position, AMemoryPerm.Read);
+
+            if (BitConverter.IsLittleEndian && !IsPageCrossed(Position, 4))
+            {
+                return *((uint*)(RamPtr + PhysPos));
+            }
+            else
+            {
+                return (uint)(
+                    ReadUInt16(Position + 0) << 0 |
+                    ReadUInt16(Position + 2) << 16);
+            }
+        }
+
+        public ulong ReadUInt64(long Position)
+        {
+            long PhysPos = Manager.GetPhys(Position, AMemoryPerm.Read);
+
+            if (BitConverter.IsLittleEndian && !IsPageCrossed(Position, 8))
+            {
+                return *((ulong*)(RamPtr + PhysPos));
+            }
+            else
+            {
+                return
+                    (ulong)ReadUInt32(Position + 0) << 0 |
+                    (ulong)ReadUInt32(Position + 4) << 32;
+            }
+        }
+
+        public AVec ReadVector128(long Position)
+        {
+            return new AVec()
+            {
+                X0 = ReadUInt64(Position + 0),
+                X1 = ReadUInt64(Position + 8)
+            };
+        }
+
+        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*)(RamPtr + Manager.GetPhys(Position, AMemoryPerm.Write))) = Value;
+        }
+
+        public void WriteUInt16(long Position, ushort Value)
+        {
+            long PhysPos = Manager.GetPhys(Position, AMemoryPerm.Write);
+
+            if (BitConverter.IsLittleEndian && !IsPageCrossed(Position, 2))
+            {
+                *((ushort*)(RamPtr + PhysPos)) = Value;
+            }
+            else
+            {
+                WriteByte(Position + 0, (byte)(Value >> 0));
+                WriteByte(Position + 1, (byte)(Value >> 8));
+            }
+        }
+
+        public void WriteUInt32(long Position, uint Value)
+        {
+            long PhysPos = Manager.GetPhys(Position, AMemoryPerm.Write);
+
+            if (BitConverter.IsLittleEndian && !IsPageCrossed(Position, 4))
+            {
+                *((uint*)(RamPtr + PhysPos)) = Value;
+            }
+            else
+            {
+                WriteUInt16(Position + 0, (ushort)(Value >> 0));
+                WriteUInt16(Position + 2, (ushort)(Value >> 16));
+            }
+        }
+
+        public void WriteUInt64(long Position, ulong Value)
+        {
+            long PhysPos = Manager.GetPhys(Position, AMemoryPerm.Write);
+
+            if (BitConverter.IsLittleEndian && !IsPageCrossed(Position, 8))
+            {
+                *((ulong*)(RamPtr + PhysPos)) = Value;
+            }
+            else
+            {
+                WriteUInt32(Position + 0, (uint)(Value >> 0));
+                WriteUInt32(Position + 4, (uint)(Value >> 32));
+            }
+        }
+
+        public void WriteVector128(long Position, AVec Value)
+        {
+            WriteUInt64(Position + 0, Value.X0);
+            WriteUInt64(Position + 8, Value.X1);
+        }
+
+        private bool IsPageCrossed(long Position, int Size)
+        {
+            return (Position & AMemoryMgr.PageMask) + Size > AMemoryMgr.PageSize;
+        }
+    }
+}