From b1109931b9a92ce89635cb7c0c0c1c0c7e6866ed Mon Sep 17 00:00:00 2001
From: Subv <subv2112@gmail.com>
Date: Mon, 23 Apr 2018 20:12:40 -0500
Subject: [PATCH] GPU: Added boilerplate code for the Fermi2D engine

---
 src/video_core/engines/fermi_2d.cpp |  7 ++++++-
 src/video_core/engines/fermi_2d.h   | 28 +++++++++++++++++++++++++++-
 src/video_core/gpu.cpp              |  2 +-
 3 files changed, 34 insertions(+), 3 deletions(-)

diff --git a/src/video_core/engines/fermi_2d.cpp b/src/video_core/engines/fermi_2d.cpp
index 7aab163dca..87634da216 100644
--- a/src/video_core/engines/fermi_2d.cpp
+++ b/src/video_core/engines/fermi_2d.cpp
@@ -7,7 +7,12 @@
 namespace Tegra {
 namespace Engines {
 
-void Fermi2D::WriteReg(u32 method, u32 value) {}
+Fermi2D::Fermi2D(MemoryManager& memory_manager) : memory_manager(memory_manager) {}
+
+void Fermi2D::WriteReg(u32 method, u32 value) {
+    ASSERT_MSG(method < Regs::NUM_REGS,
+               "Invalid Fermi2D register, increase the size of the Regs structure");
+}
 
 } // namespace Engines
 } // namespace Tegra
diff --git a/src/video_core/engines/fermi_2d.h b/src/video_core/engines/fermi_2d.h
index 8967ddede0..a97f5bb28f 100644
--- a/src/video_core/engines/fermi_2d.h
+++ b/src/video_core/engines/fermi_2d.h
@@ -4,19 +4,45 @@
 
 #pragma once
 
+#include <array>
+#include "common/assert.h"
+#include "common/common_funcs.h"
 #include "common/common_types.h"
+#include "video_core/memory_manager.h"
 
 namespace Tegra {
 namespace Engines {
 
+#define FERMI2D_REG_INDEX(field_name)                                                              \
+    (offsetof(Tegra::Engines::Fermi2D::Regs, field_name) / sizeof(u32))
+
 class Fermi2D final {
 public:
-    Fermi2D() = default;
+    explicit Fermi2D(MemoryManager& memory_manager);
     ~Fermi2D() = default;
 
     /// Write the value to the register identified by method.
     void WriteReg(u32 method, u32 value);
+
+    struct Regs {
+        static constexpr size_t NUM_REGS = 0x258;
+
+        union {
+            struct {
+                INSERT_PADDING_WORDS(0x258);
+            };
+            std::array<u32, NUM_REGS> reg_array;
+        };
+    } regs{};
+
+    MemoryManager& memory_manager;
 };
 
+#define ASSERT_REG_POSITION(field_name, position)                                                  \
+    static_assert(offsetof(Fermi2D::Regs, field_name) == position * 4,                             \
+                  "Field " #field_name " has invalid position")
+
+#undef ASSERT_REG_POSITION
+
 } // namespace Engines
 } // namespace Tegra
diff --git a/src/video_core/gpu.cpp b/src/video_core/gpu.cpp
index 9463cd5d66..351d217116 100644
--- a/src/video_core/gpu.cpp
+++ b/src/video_core/gpu.cpp
@@ -12,7 +12,7 @@ namespace Tegra {
 GPU::GPU() {
     memory_manager = std::make_unique<MemoryManager>();
     maxwell_3d = std::make_unique<Engines::Maxwell3D>(*memory_manager);
-    fermi_2d = std::make_unique<Engines::Fermi2D>();
+    fermi_2d = std::make_unique<Engines::Fermi2D>(*memory_manager);
     maxwell_compute = std::make_unique<Engines::MaxwellCompute>();
 }