Subversion Repositories wbddr3

////////////////////////////////////////////////////////////////////////////////

//

// Filename:    ddrsdramsim.h

//

// Project:     A wishbone controlled DDR3 SDRAM memory controller.

//

// Purpose:     

//

// Creator:     Dan Gisselquist, Ph.D.

//              Gisselquist Technology, LLC

//

////////////////////////////////////////////////////////////////////////////////

//

// Copyright (C) 2015-2016, Gisselquist Technology, LLC

//

// This program is free software (firmware): you can redistribute it and/or

// modify it under the terms of  the GNU General Public License as published

// by the Free Software Foundation, either version 3 of the License, or (at

// your option) any later version.

//

// This program is distributed in the hope that it will be useful, but WITHOUT

// ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY or

// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

// for more details.

//

// You should have received a copy of the GNU General Public License along

// with this program.  (It's in the $(ROOT)/doc directory, run make with no

// target there if the PDF file isn't present.)  If not, see

// <http://www.gnu.org/licenses/> for a copy.

//

// License:     GPL, v3, as defined and found on www.gnu.org,

//              http://www.gnu.org/licenses/gpl.html

//

//

////////////////////////////////////////////////////////////////////////////////

//

//

#ifndef DDRSDRAMSIM_H

#define DDRSDRAMSIM_H

#define DDR_MRSET       0

#define DDR_REFRESH     1

#define DDR_PRECHARGE   2

#define DDR_ACTIVATE    3

#define DDR_WRITE       4

#define DDR_READ        5

#define DDR_ZQS         6

#define DDR_NOOP        7

#define DDR_DESELECT    8

#define NBANKS          8

#define NTIMESLOTS      32

#define NWIDTH          1

class   BANKINFO {

public:

        int             m_state;

        unsigned        m_row, m_wcounter, m_min_time_before_precharge,

                        m_min_time_before_activate;

        BANKINFO(void);

        void    tick(int cmd, unsigned addr=0);

};

class   BUSTIMESLOT     {

public:

        int     m_used, m_read, m_data, m_rtt;

        unsigned        m_addr;

};

class   DDRSDRAMSIM     {

        int             m_reset_state, m_reset_counts, m_memlen, m_busloc,

                        m_clocks_since_refresh, m_nrefresh_issued,

                        m_last_dqs, m_last_rtt;

        unsigned        *m_mem;

        BUSTIMESLOT     *m_bus;

        int     cmd(int,int,int,int);

public:

        BANKINFO        m_bank[8];

        DDRSDRAMSIM(int lglen);

        unsigned apply(int, int,

                        int, int, int, int,

                        int, int, int, int,

                        int, int, int);

        unsigned operator()(int reset_n, int cke,

                        int csn, int rasn, int casn, int wen,

                        int dqs, int dm, int odt, int busoe,

                        int addr, int ba, int data) {

                return apply(reset_n, cke, csn, rasn, casn, wen, dqs, dm, odt,

                        busoe, addr, ba, data);

        }

        unsigned &mem(unsigned addr) { return m_mem[addr]; };

        unsigned &operator[](unsigned addr) { return mem(addr); };

};

#endif