Subversion Repositories ao486

/*

 * Copyright (c) 2014, Aleksander Osman

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions are met:

 *

 * * Redistributions of source code must retain the above copyright notice, this

 *   list of conditions and the following disclaimer.

 *

 * * Redistributions in binary form must reproduce the above copyright notice,

 *   this list of conditions and the following disclaimer in the documentation

 *   and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER

 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,

 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

package ao486.module.memory;

import java.util.HashMap;

public class WriteListener implements Listener {

    public interface WriteInterface {

        void written(int cycle) throws Exception;

        void write_page_fault(int cycle, long cr2, long error_code) throws Exception;

        void write_ac_fault(int cycle) throws Exception;

    }

    public void write(int cycle, long cpl, long address, long length, boolean lock, boolean rmw, long data, WriteListener.WriteInterface write_interface) throws Exception {

        if(map.containsKey(cycle)) throw new Exception("Double write in cycle: " + cycle);

        Input input = new Input();

        input.write_address = address;

        input.write_cpl     = cpl;

        input.write_length  = length;

        input.write_lock    = lock;

        input.write_rmw     = rmw;

        input.write_data    = data;

        map.put(cycle, input);

        write_map.put(cycle, write_interface);

    }

    //------------------------------

    @Override

    public void set_input(int cycle, Input input) throws Exception {

        if(write != null && map.containsKey(cycle)) throw new Exception("Overlapping write detected on cycle " + cycle);

        if(write != null) {

            input.write_do       = true;

            input.write_cpl      = write_input.write_cpl;

            input.write_address  = write_input.write_address;

            input.write_length   = write_input.write_length;

            input.write_lock     = write_input.write_lock;

            input.write_rmw      = write_input.write_rmw;

            input.write_data     = write_input.write_data;

        }

        Input local_input = map.get(cycle);

        if(local_input != null) {

            write = write_map.get(cycle);

            input.write_do       = true;

            input.write_cpl      = local_input.write_cpl;

            input.write_address  = local_input.write_address;

            input.write_length   = local_input.write_length;

            input.write_lock     = local_input.write_lock;

            input.write_rmw      = local_input.write_rmw;

            input.write_data     = local_input.write_data;

            write_input = input;

        }

    }

    @Override

    public void get_output(int cycle, Output output) throws Exception {

        if(write == null && output.write_page_fault == false && (output.write_done || output.write_page_fault || output.write_ac_fault)) {

            throw new Exception("Unexpected write done.");

        }

        if(output.write_done       && output.write_page_fault)    throw new Exception("Double write result.");

        if(output.write_done       && output.write_ac_fault)      throw new Exception("Double write result.");

        if(output.write_page_fault && output.write_ac_fault)      throw new Exception("Double write result.");

        if(write != null && output.write_done) {

            write.written(cycle);

            write = null;

        }

        if(write != null && output.write_page_fault) {

            write.write_page_fault(cycle, output.tlb_write_pf_cr2, output.tlb_write_pf_error_code);

            write = null;

        }

        if(write != null && output.write_ac_fault) {

            write.write_ac_fault(cycle);

            write = null;

        }

    }

    /*

    //Input

    public boolean write_do                        = false;

    public long    write_cpl                       = 0; //2

    public long    write_address                   = 0; //32

    public long    write_length                    = 0; //3

    public boolean write_lock                      = false;

    public boolean write_rmw                       = false;

    public long    write_data                      = 0; //32

    //Output

    public boolean write_done;

    public boolean write_page_fault;

    public boolean write_ac_fault;

    */

    WriteInterface write;

    Input          write_input;

    HashMap<Integer, Input> map                = new HashMap<>();

    HashMap<Integer, WriteInterface> write_map = new HashMap<>();

}