/*!
 \file Memory.h
 \brief Basic TLM-2 memory model
 \author Màrius Montón
 \date August 2018
 */
// SPDX-License-Identifier: GPL-3.0-or-later

#ifndef __MEMORY_H__
#define __MEMORY_H__

#include <iostream>
#include <fstream>

#define SC_INCLUDE_DYNAMIC_PROCESSES

#include "systemc"

#include "tlm.h"
#include "tlm_utils/simple_target_socket.h"

#include "Log.h"

/**
 * @brief Basic TLM-2 memory
 */
class Memory: sc_core::sc_module {
public:
	// TLM-2 socket, defaults to 32-bits wide, base protocol
	tlm_utils::simple_target_socket<Memory> socket;

	//enum { SIZE = 0x90000000  };
	enum {
		SIZE = 0x10000000
	};
	const sc_core::sc_time LATENCY;

	Memory(sc_core::sc_module_name const &name, std::string const &filename);
	Memory(const sc_core::sc_module_name& name);

	~Memory(void);

	/**
	 * @brief Returns Program Counter read from hexfile
	 * @return Initial PC
	 */
	virtual uint32_t getPCfromHEX();

	// TLM-2 blocking transport method
	virtual void b_transport(tlm::tlm_generic_payload &trans,
			sc_core::sc_time &delay);

	// *********************************************
	// TLM-2 forward DMI method
	// *********************************************
	virtual bool get_direct_mem_ptr(tlm::tlm_generic_payload &trans,
			tlm::tlm_dmi &dmi_data);

	// *********************************************
	// TLM-2 debug transport method
	// *********************************************
	virtual unsigned int transport_dbg(tlm::tlm_generic_payload &trans);

private:

	/**
	 * @brief Memory array in bytes
	 */
	uint8_t *mem;

	/**
	 * @brief Log class
	 */
	Log *log;

	/**
	 * @brief Program counter (PC) read from hex file
	 */
	uint32_t program_counter;

	uint32_t memory_offset;
	/**
	 * @brief Read Intel hex file
	 * @param filename file name to read
	 */
	void readHexFile(const std::string& filename);
};
#endif /* __MEMORY_H__ */