Initial work

1 files changed, 54 insertions, 0 deletions

diff --git a/Ryujinx.Graphics.Gpu/Memory/MemoryAccessor.cs b/Ryujinx.Graphics.Gpu/Memory/MemoryAccessor.cs
new file mode 100644
index 00000000..500c36e5
--- /dev/null
+++ b/Ryujinx.Graphics.Gpu/Memory/MemoryAccessor.cs
@@ -0,0 +1,54 @@
+using System;
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.Graphics.Gpu.Memory
+{
+    class MemoryAccessor
+    {
+        private GpuContext _context;
+
+        public MemoryAccessor(GpuContext context)
+        {
+            _context = context;
+        }
+
+        public Span<byte> Read(ulong gpuVa, ulong maxSize)
+        {
+            ulong processVa = _context.MemoryManager.Translate(gpuVa);
+
+            ulong size = Math.Min(_context.MemoryManager.GetSubSize(gpuVa), maxSize);
+
+            return _context.PhysicalMemory.Read(processVa, size);
+        }
+
+        public T Read<T>(ulong gpuVa) where T : struct
+        {
+            ulong processVa = _context.MemoryManager.Translate(gpuVa);
+
+            ulong size = (uint)Marshal.SizeOf<T>();
+
+            return MemoryMarshal.Cast<byte, T>(_context.PhysicalMemory.Read(processVa, size))[0];
+        }
+
+        public int ReadInt32(ulong gpuVa)
+        {
+            ulong processVa = _context.MemoryManager.Translate(gpuVa);
+
+            return BitConverter.ToInt32(_context.PhysicalMemory.Read(processVa, 4));
+        }
+
+        public void Write(ulong gpuVa, int value)
+        {
+            ulong processVa = _context.MemoryManager.Translate(gpuVa);
+
+            _context.PhysicalMemory.Write(processVa, BitConverter.GetBytes(value));
+        }
+
+        public void Write(ulong gpuVa, Span<byte> data)
+        {
+            ulong processVa = _context.MemoryManager.Translate(gpuVa);
+
+            _context.PhysicalMemory.Write(processVa, data);
+        }
+    }
+}
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