133 lines
4.1 KiB
C++
133 lines
4.1 KiB
C++
// Copyright 2014 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include <memory>
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#include <string>
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#include "common/common_types.h"
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#include "core/memory.h"
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class EmuWindow;
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class ARM_Interface;
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namespace Loader {
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class AppLoader;
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}
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namespace Core {
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struct ThreadContext {
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u32 cpu_registers[13];
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u32 sp;
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u32 lr;
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u32 pc;
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u32 cpsr;
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u32 fpu_registers[64];
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u32 fpscr;
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u32 fpexc;
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};
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class System {
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public:
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/**
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* Gets the instance of the System singleton class.
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* @returns Reference to the instance of the System singleton class.
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*/
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static System& GetInstance() {
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return s_instance;
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}
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/// Enumeration representing the return values of the System Initialize and Load process.
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enum class ResultStatus : u32 {
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Success, ///< Succeeded
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ErrorNotInitialized, ///< Error trying to use core prior to initialization
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ErrorGetLoader, ///< Error finding the correct application loader
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ErrorSystemMode, ///< Error determining the system mode
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ErrorLoader, ///< Error loading the specified application
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ErrorLoader_ErrorEncrypted, ///< Error loading the specified application due to encryption
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ErrorLoader_ErrorInvalidFormat, ///< Error loading the specified application due to an invalid format
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ErrorVideoCore, ///< Error in the video core
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};
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/**
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* Run the core CPU loop
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* This function runs the core for the specified number of CPU instructions before trying to update
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* hardware. This is much faster than SingleStep (and should be equivalent), as the CPU is not
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* required to do a full dispatch with each instruction. NOTE: the number of instructions requested
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* is not guaranteed to run, as this will be interrupted preemptively if a hardware update is
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* requested (e.g. on a thread switch).
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* @param tight_loop Number of instructions to execute.
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* @return Result status, indicating whethor or not the operation succeeded.
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*/
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ResultStatus RunLoop(int tight_loop = 1000);
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/**
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* Step the CPU one instruction
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* @return Result status, indicating whethor or not the operation succeeded.
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*/
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ResultStatus SingleStep();
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/// Shutdown the emulated system.
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void Shutdown();
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/**
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* Load an executable application.
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* @param emu_window Pointer to the host-system window used for video output and keyboard input.
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* @param filepath String path to the executable application to load on the host file system.
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* @returns ResultStatus code, indicating if the operation succeeded.
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*/
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ResultStatus Load(EmuWindow* emu_window, const std::string& filepath);
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/**
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* Indicates if the emulated system is powered on (all subsystems initialized and able to run an
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* application).
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* @returns True if the emulated system is powered on, otherwise false.
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*/
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bool IsPoweredOn() const {
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return app_core != nullptr;
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}
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/// Prepare the core emulation for a reschedule
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void PrepareReschedule();
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/**
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* Gets a reference to the emulated AppCore CPU.
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* @returns A reference to the emulated AppCore CPU.
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*/
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ARM_Interface& AppCore() {
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return *app_core;
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}
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private:
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/**
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* Initialize the emulated system.
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* @param emu_window Pointer to the host-system window used for video output and keyboard input.
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* @param system_mode The system mode.
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* @return ResultStatus code, indicating if the operation succeeded.
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*/
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ResultStatus Init(EmuWindow* emu_window, u32 system_mode);
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/// Reschedule the core emulation
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void Reschedule();
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/// AppLoader used to load the current executing application
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std::unique_ptr<Loader::AppLoader> app_loader;
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///< ARM11 application core
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std::unique_ptr<ARM_Interface> app_core;
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/// When true, signals that a reschedule should happen
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bool reschedule_pending{};
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static System s_instance;
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};
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static ARM_Interface& AppCore() {
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return System::GetInstance().AppCore();
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}
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} // namespace Core
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