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;

public class PrefetchListener implements Listener {

    public interface PrefetchInterface {

        void prefetched(int cycle, long value, long size) throws Exception;

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

        void prefetch_gp_fault(int cycle) throws Exception;

    }

    public void prefetch(long cpl, long eip, long cs_base, long cs_limit, PrefetchListener.PrefetchInterface prefetch_interface) throws Exception {

        prefetch_input = new Input();

        prefetch_input.cpl      = cpl;

        prefetch_input.eip      = eip;

        prefetch_input.cs_base  = cs_base;

        prefetch_input.cs_limit = cs_limit;

        prefetch = prefetch_interface;

    }

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

    @Override

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

        input.cpl       = prefetch_input.cpl;

        input.eip       = prefetch_input.eip;

        input.cs_base   = prefetch_input.cs_base;

        input.cs_limit  = prefetch_input.cs_limit;

        input.prefetchfifo_accept_do = true;

    }

    @Override

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

        if(output.prefetchfifo_accept_empty == false) {

            long value = output.prefetchfifo_accept_data.longValue();

            long size = output.prefetchfifo_accept_data.shiftRight(64).longValue() & 0xFL;

            if(size == 14) { //page fault

                prefetch.prefetch_page_fault(cycle, output.tlb_code_pf_cr2, output.tlb_code_pf_error_code);

            }

            else if(size == 15) { //gp fault

                prefetch.prefetch_gp_fault(cycle);

            }

            else if(size > 0) {

                prefetch.prefetched(cycle, value, size);

            }

        }

    }

    /*

    //Input

    public long    cpl                             = 0; //2

    public long    eip                             = 0; //32

    public long    cs_base                         = 0; //32

    public long    cs_limit                        = 0; //32

    public boolean prefetchfifo_accept_do          = false;

    //Output

    public BigInteger prefetchfifo_accept_data; //68

    public boolean prefetchfifo_accept_empty;

    public long    tlb_code_pf_cr2; //32

    public long    tlb_code_pf_error_code; //16

    */

    PrefetchInterface   prefetch;

    Input               prefetch_input;

}