Initialize GPU physical memory accessor from KProcess, to allow homebrew that never maps anything on the GPU to work

Ryujinx.Graphics.Gpu/Memory/PhysicalMemory.cs

@@ -0,0 +1,31 @@
+using System;
+
+namespace Ryujinx.Graphics.Gpu.Memory
+{
+    using CpuMemoryManager = ARMeilleure.Memory.MemoryManager;
+
+    class PhysicalMemory
+    {
+        private readonly CpuMemoryManager _cpuMemory;
+
+        public PhysicalMemory(CpuMemoryManager cpuMemory)
+        {
+            _cpuMemory = cpuMemory;
+        }
+
+        public Span<byte> Read(ulong address, ulong size)
+        {
+            return _cpuMemory.ReadBytes((long)address, (long)size);
+        }
+
+        public void Write(ulong address, Span<byte> data)
+        {
+            _cpuMemory.WriteBytes((long)address, data.ToArray());
+        }
+
+        public (ulong, ulong)[] GetModifiedRanges(ulong address, ulong size, ResourceName name)
+        {
+            return _cpuMemory.GetModifiedRanges(address, size, (int)name);
+        }
+    }
+}