fix_latency_slave.h

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//    sampalib.org ESL library and tools
//    Copyright (C) 2007  Thierry Grellier
//
//    This program is free software; you can redistribute it and/or modify
//    it under the terms of the GNU General Public License version 2 as
//    published by the Free Software Foundation.
//
//    This program is distributed in the hope that it will be useful,
//    but WITHOUT ANY WARRANTY; without even the implied warranty of
//    MERCHANTABILITY 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; if not, write to the Free Software Foundation, Inc.,
//    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
//    contact: www.sampalib.org

#ifndef SAMPA_FIX_LATENCY_SLAVE_H
#define SAMPA_FIX_LATENCY_SLAVE_H

#include "sampa/component/protocol.h"
#include "sampa/core/fifo.h"
#include "sampa/core/select.h"
#include "sampa/core/sarray.h"

namespace Sampa {

  struct SAMPA_PERSISTENT_CLASS(ResponseForecast) {
    ResponseForecast(DefaultCtrTag);
    Response           m_response;
    unsigned long long m_date;
    SAMPA_PERSISTENT(ResponseForecast);
  };
  
  class FixLatencySlave : public Module, public TargetRequestInterface {
    SAMPA_MODULE(FixLatencySlave);
  public:
    FixLatencySlave(const Name& name);

    void bind_clock(Clock* clock);
    Target* get_target() { return &p_target; }
    void bind_initiator(Initiator* initiator);
    
    bool recieve_request(const Request& request);
    
  protected:
    bool check_elaboration();
    void complete_restart();
    void execute();

  private:       
    Target                   p_target;
    Clock*                   p_clock; 
    EventListenerSingle      e_new_request_or_response_accepted;
    EventListenerSingle      e_new_request_or_send_response;
    ClockedEvent             e_send_response;
    unsigned long long       m_stalled;
    unsigned long long       m_date;
    Response                 m_current;
    bool                     m_pending;
    Fifo                     m_fifo;
    Array<Response>          m_response_to_send;
    Gated<Request>           m_request;
    Gated<bool>              m_new_request;
    int                      m_burst;
    int                      m_command_latencies[2*CMD_NUM];
  };

}

#endif

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