Initial support for separate GPU address spaces (#2394)

* Make GPU memory manager a member of GPU channel

* Move physical memory instance to the memory manager, and the caches to the physical memory

* PR feedback

Ryujinx.HLE/HOS/Services/Nv/Host1xContext.cs

@@ -0,0 +1,47 @@
+using Ryujinx.Graphics.Gpu;
+using Ryujinx.Graphics.Gpu.Memory;
+using Ryujinx.Graphics.Host1x;
+using Ryujinx.Graphics.Nvdec;
+using Ryujinx.Graphics.Vic;
+using System;
+
+namespace Ryujinx.HLE.HOS.Services.Nv
+{
+    class Host1xContext : IDisposable
+    {
+        public MemoryManager Smmu { get; }
+        public NvMemoryAllocator MemoryAllocator { get; }
+        public Host1xDevice Host1x { get;}
+
+        public Host1xContext(GpuContext gpu, long pid)
+        {
+            MemoryAllocator = new NvMemoryAllocator();
+            Host1x = new Host1xDevice(gpu.Synchronization);
+            Smmu = gpu.CreateMemoryManager(pid);
+            var nvdec = new NvdecDevice(Smmu);
+            var vic = new VicDevice(Smmu);
+            Host1x.RegisterDevice(ClassId.Nvdec, nvdec);
+            Host1x.RegisterDevice(ClassId.Vic, vic);
+
+            nvdec.FrameDecoded += (FrameDecodedEventArgs e) =>
+            {
+                // FIXME:
+                // Figure out what is causing frame ordering issues on H264.
+                // For now this is needed as workaround.
+                if (e.CodecId == CodecId.H264)
+                {
+                    vic.SetSurfaceOverride(e.LumaOffset, e.ChromaOffset, 0);
+                }
+                else
+                {
+                    vic.DisableSurfaceOverride();
+                }
+            };
+        }
+
+        public void Dispose()
+        {
+            Host1x.Dispose();
+        }
+    }
+}