HW: Pass System to functions.

Source/Core/Core/Core.cpp

@@ -531,13 +531,14 @@ static void EmuThread(std::unique_ptr<BootParameters> boot, WindowSystemInfo wsi
   AudioCommon::InitSoundStream(system);
   Common::ScopeGuard audio_guard([&system] { AudioCommon::ShutdownSoundStream(system); });
 
-  HW::Init(NetPlay::IsNetPlayRunning() ? &(boot_session_data.GetNetplaySettings()->sram) : nullptr);
+  HW::Init(system,
+           NetPlay::IsNetPlayRunning() ? &(boot_session_data.GetNetplaySettings()->sram) : nullptr);
 
   Common::ScopeGuard hw_guard{[&system] {
     // We must set up this flag before executing HW::Shutdown()
     s_hardware_initialized = false;
     INFO_LOG_FMT(CONSOLE, "{}", StopMessage(false, "Shutting down HW"));
-    HW::Shutdown();
+    HW::Shutdown(system);
     INFO_LOG_FMT(CONSOLE, "{}", StopMessage(false, "HW shutdown"));
 
     // Clear on screen messages that haven't expired

Source/Core/Core/HW/HW.cpp

@@ -31,9 +31,8 @@
 
 namespace HW
 {
-void Init(const Sram* override_sram)
+void Init(Core::System& system, const Sram* override_sram)
 {
-  auto& system = Core::System::GetInstance();
   system.GetCoreTiming().Init();
   SystemTimers::PreInit();
 
@@ -62,10 +61,8 @@ void Init(const Sram* override_sram)
   }
 }
 
-void Shutdown()
+void Shutdown(Core::System& system)
 {
-  auto& system = Core::System::GetInstance();
-
   // IOS should always be shut down regardless of bWii because it can be running in GC mode (MIOS).
   IOS::HLE::Shutdown();  // Depends on Memory
   IOS::Shutdown();
@@ -86,9 +83,8 @@ void Shutdown()
   system.GetCoreTiming().Shutdown();
 }
 
-void DoState(PointerWrap& p)
+void DoState(Core::System& system, PointerWrap& p)
 {
-  auto& system = Core::System::GetInstance();
   system.GetMemory().DoState(p);
   p.DoMarker("Memory");
   system.GetMemoryInterface().DoState(p);

Source/Core/Core/HW/HW.h

@@ -5,10 +5,14 @@
 
 class PointerWrap;
 struct Sram;
+namespace Core
+{
+class System;
+}
 
 namespace HW
 {
-void Init(const Sram* override_sram);
-void Shutdown();
-void DoState(PointerWrap& p);
+void Init(Core::System& system, const Sram* override_sram);
+void Shutdown(Core::System& system);
+void DoState(Core::System& system, PointerWrap& p);
 }  // namespace HW

Source/Core/Core/State.cpp

@@ -230,7 +230,7 @@ static void DoState(PointerWrap& p)
   p.DoMarker("CoreTiming");
 
   // HW needs to be restored before PowerPC because the data cache might need to be flushed.
-  HW::DoState(p);
+  HW::DoState(system, p);
   p.DoMarker("HW");
 
   PowerPC::DoState(p);