GPU: Added a command processor to decode the GPU pushbuffers and forward the commands to their respective engines.

src/video_core/command_processor.h

@@ -0,0 +1,43 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <type_traits>
+#include "common/bit_field.h"
+#include "common/common_types.h"
+
+namespace Tegra {
+
+namespace CommandProcessor {
+
+enum class SubmissionMode : u32 {
+    IncreasingOld = 0,
+    Increasing = 1,
+    NonIncreasingOld = 2,
+    NonIncreasing = 3,
+    Inline = 4,
+    IncreaseOnce = 5
+};
+
+union CommandHeader {
+    u32 hex;
+
+    BitField<0, 13, u32> method;
+    BitField<13, 3, u32> subchannel;
+
+    BitField<16, 13, u32> arg_count;
+    BitField<16, 13, u32> inline_data;
+
+    BitField<29, 3, SubmissionMode> mode;
+};
+static_assert(std::is_standard_layout<CommandHeader>::value == true,
+              "CommandHeader does not use standard layout");
+static_assert(sizeof(CommandHeader) == sizeof(u32), "CommandHeader has incorrect size!");
+
+void ProcessCommandList(VAddr address, u32 size);
+
+} // namespace CommandProcessor
+
+} // namespace Tegra