SpecialRegisterPort.hh

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/*
    Copyright (c) 2002-2009 Tampere University.
 
    This file is part of TTA-Based Codesign Environment (TCE).
 
    Permission is hereby granted, free of charge, to any person obtaining a
    copy of this software and associated documentation files (the "Software"),
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    The above copyright notice and this permission notice shall be included in
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/**
 * @file SpecialRegisterPort.hh
 *
 * Declaration of SpecialRegisterPort class.
 *
 * @author Lasse Laasonen 2005 (lasse.laasonen-no.spam-tut.fi)
 * @note rating: red
 */
 
#ifndef TTA_SPECIAL_REGISTER_PORT_HH
#define TTA_SPECIAL_REGISTER_PORT_HH
 
#include "BaseFUPort.hh"
 
namespace TTAMachine {
 
class ControlUnit;
 
/**
 * SpecialRegisterPort class represent a port of a special register in
 * control unit.
 *
 * An example of such a port is the return address port.
 */
class SpecialRegisterPort : public BaseFUPort {
public:
    SpecialRegisterPort(
        const std::string& name, int width, ControlUnit& parent);
    SpecialRegisterPort(const ObjectState* state, Unit& parent);
    virtual ~SpecialRegisterPort();
 
    virtual bool isTriggering() const;
    virtual bool isOpcodeSetting() const;
 
    virtual ObjectState* saveState() const;
    virtual void loadState(const ObjectState* state);
 
    /// ObjectState name for special register port.
    static const std::string OSNAME_SPECIAL_REG_PORT;
};
}
 
#endif