Add setting for toggling fastmem

Author: wheremyfoodat

include/config.hpp

@@ -2,10 +2,10 @@
 #include <filesystem>
 #include <string>
 
-#include "screen_layout.hpp"
 #include "audio/dsp_core.hpp"
 #include "frontend_settings.hpp"
 #include "renderer.hpp"
+#include "screen_layout.hpp"
 #include "services/region_codes.hpp"
 
 struct AudioDeviceConfig {
@@ -58,11 +58,13 @@ struct EmulatorConfig {
 	static constexpr RendererType rendererDefault = RendererType::OpenGL;
 #endif
 
+	static constexpr bool enableFastmemDefault = true;
 	static constexpr bool hashTexturesDefault = false;
 
 	bool shaderJitEnabled = shaderJitDefault;
 	bool useUbershaders = ubershaderDefault;
 	bool accelerateShaders = accelerateShadersDefault;
+	bool fastmemEnabled = enableFastmemDefault;
 	bool hashTextures = hashTexturesDefault;
 
 	ScreenLayout::Layout screenLayout = ScreenLayout::Layout::Default;

include/emulator.hpp

@@ -39,6 +39,7 @@ enum class ROMType {
 };
 
 class Emulator {
+	// Config should be initialized before anything else
 	EmulatorConfig config;
 
 	Memory memory;

src/config.cpp

@@ -48,6 +48,7 @@ void EmulatorConfig::load() {
 
 			printAppVersion = toml::find_or<toml::boolean>(general, "PrintAppVersion", true);
 			circlePadProEnabled = toml::find_or<toml::boolean>(general, "EnableCirclePadPro", true);
+			fastmemEnabled = toml::find_or<toml::boolean>(general, "EnableFastmem", enableFastmemDefault);
 			systemLanguage = languageCodeFromString(toml::find_or<std::string>(general, "SystemLanguage", "en"));
 		}
 	}
@@ -180,6 +181,7 @@ void EmulatorConfig::save() {
 	data["General"]["PrintAppVersion"] = printAppVersion;
 	data["General"]["SystemLanguage"] = languageCodeToString(systemLanguage);
 	data["General"]["EnableCirclePadPro"] = circlePadProEnabled;
+	data["General"]["EnableFastmem"] = fastmemEnabled;
 
 	data["Window"]["AppVersionOnWindow"] = windowSettings.showAppVersion;
 	data["Window"]["RememberWindowPosition"] = windowSettings.rememberPosition;

src/core/memory.cpp

@@ -16,15 +16,16 @@ CMRC_DECLARE(ConsoleFonts);
 using namespace KernelMemoryTypes;
 
 Memory::Memory(KFcram& fcramManager, const EmulatorConfig& config) : fcramManager(fcramManager), config(config) {
-	arena = new Common::HostMemory(FASTMEM_BACKING_SIZE, FASTMEM_VIRTUAL_SIZE, false);
+	const bool fastmemEnabled = config.fastmemEnabled;
+	arena = new Common::HostMemory(FASTMEM_BACKING_SIZE, FASTMEM_VIRTUAL_SIZE, fastmemEnabled);
 
 	readTable.resize(totalPageCount, 0);
 	writeTable.resize(totalPageCount, 0);
 	paddrTable.resize(totalPageCount, 0);
 
 	fcram = arena->BackingBasePointer() + FASTMEM_FCRAM_OFFSET;
 	// arenaDSPRam = arena->BackingBasePointer() + FASTMEM_DSP_RAM_OFFSET;
-	useFastmem = arena->VirtualBasePointer() != nullptr;
+	useFastmem = fastmemEnabled && arena->VirtualBasePointer() != nullptr;
 }
 
 void Memory::reset() {

src/panda_qt/config_window.cpp

@@ -172,6 +172,10 @@ ConfigWindow::ConfigWindow(ConfigCallback configCallback, MainWindowCallback win
 	connectCheckbox(circlePadProEnabled, config.circlePadProEnabled);
 	genLayout->addRow(circlePadProEnabled);
 
+	QCheckBox* fastmemEnabled = new QCheckBox(tr("Enable fastmem"));
+	connectCheckbox(fastmemEnabled, config.fastmemEnabled);
+	genLayout->addRow(fastmemEnabled);
+
 	QCheckBox* discordRpcEnabled = new QCheckBox(tr("Enable Discord RPC"));
 	connectCheckbox(discordRpcEnabled, config.discordRpcEnabled);
 	genLayout->addRow(discordRpcEnabled);