NvServices refactoring (#120)

* Initial implementation of NvMap/NvHostCtrl

* More work on NvHostCtrl

* Refactoring of nvservices, move GPU Vmm, make Vmm per-process, refactor most gpu devices, move Gpu to Core, fix CbBind

* Implement GetGpuTime, support CancelSynchronization, fix issue on InsertWaitingMutex, proper double buffering support (again, not working properly for commercial games, only hb)

* Try to fix perf regression reading/writing textures, moved syncpts and events to a UserCtx class, delete global state when the process exits, other minor tweaks

* Remove now unused code, add comment about probably wrong result codes

Memory/AMemory.cs

@@ -6,7 +6,7 @@ using System.Runtime.InteropServices;
 
 namespace ChocolArm64.Memory
 {
-    public unsafe class AMemory : IDisposable
+    public unsafe class AMemory : IAMemory, IDisposable
     {
         private const long ErgMask = (4 << AThreadState.ErgSizeLog2) - 1;
 

Memory/IAMemory.cs

@@ -0,0 +1,37 @@
+namespace ChocolArm64.Memory
+{
+    public interface IAMemory
+    {
+        sbyte ReadSByte(long Position);
+
+        short ReadInt16(long Position);
+
+        int ReadInt32(long Position);
+
+        long ReadInt64(long Position);
+
+        byte ReadByte(long Position);
+
+        ushort ReadUInt16(long Position);
+
+        uint ReadUInt32(long Position);
+
+        ulong ReadUInt64(long Position);
+
+        void WriteSByte(long Position, sbyte Value);
+
+        void WriteInt16(long Position, short Value);
+
+        void WriteInt32(long Position, int Value);
+
+        void WriteInt64(long Position, long Value);
+
+        void WriteByte(long Position, byte Value);
+
+        void WriteUInt16(long Position, ushort Value);
+
+        void WriteUInt32(long Position, uint Value);
+
+        void WriteUInt64(long Position, ulong Value);
+    }
+}