Mesen-SX/Core/MemoryManager.h

#pragma once
#include "stdafx.h"
#include "DebugTypes.h"
#include "MemoryMappings.h"
#include "../Utilities/ISerializable.h"

class IMemoryHandler;
class RegisterHandlerA;
class RegisterHandlerB;
class InternalRegisters;
class RamHandler;
class BaseCartridge;
class Console;
class Ppu;
class Cpu;
class CheatManager;
enum class MemoryOperationType;

enum class SnesEventType : uint8_t
{
	HdmaInit,
	DramRefresh,
	HdmaStart,
	EndOfScanline
};

class MemoryManager : public ISerializable
{
public:
	constexpr static uint32_t WorkRamSize = 0x20000;

private:
	Console* _console;

	shared_ptr<RegisterHandlerA> _registerHandlerA;
	shared_ptr<RegisterHandlerB> _registerHandlerB;

	InternalRegisters* _regs;
	Ppu* _ppu;
	Cpu* _cpu;
	BaseCartridge* _cart;
	CheatManager* _cheatManager;
	uint8_t* _workRam;

	uint64_t _masterClock = 0;
	uint16_t _hClock = 0;
	uint16_t _nextEventClock = 0;
	uint16_t _dramRefreshPosition = 0;
	SnesEventType _nextEvent = SnesEventType::DramRefresh;
	SnesMemoryType _memTypeBusA = SnesMemoryType::PrgRom;

	uint8_t _cpuSpeed = 8;
	uint8_t _openBus = 0;

	MemoryMappings _mappings;
	vector<unique_ptr<IMemoryHandler>> _workRamHandlers;
	uint8_t _masterClockTable[0x800];

	void Exec();

	void ProcessEvent();

public:
	void Initialize(Console* console);
	virtual ~MemoryManager();

	void Reset();

	void GenerateMasterClockTable();

	void IncMasterClock4();
	void IncMasterClock6();
	void IncMasterClock8();
	void IncMasterClock40();
	void IncMasterClockStartup();
	void IncrementMasterClockValue(uint16_t value);

	uint8_t Read(uint32_t addr, MemoryOperationType type);
	uint8_t ReadDma(uint32_t addr, bool forBusA);

	uint8_t Peek(uint32_t addr);
	uint16_t PeekWord(uint32_t addr);
	void PeekBlock(uint32_t addr, uint8_t* dest);

	void Write(uint32_t addr, uint8_t value, MemoryOperationType type);
	void WriteDma(uint32_t addr, uint8_t value, bool forBusA);

	uint8_t GetOpenBus();
	uint64_t GetMasterClock();
	uint16_t GetHClock();
	uint8_t* DebugGetWorkRam();

	MemoryMappings* GetMemoryMappings();

	uint8_t GetCpuSpeed(uint32_t addr);
	uint8_t GetCpuSpeed();
	void SetCpuSpeed(uint8_t speed);
	SnesMemoryType GetMemoryTypeBusA();

	bool IsRegister(uint32_t cpuAddress);
	bool IsWorkRam(uint32_t cpuAddress);

	void Serialize(Serializer& s) override;
};