xref: /gem5/ext/dsent/model/timing_graph/ElectricalDriverMultiplier.h

/* Copyright (c) 2012 Massachusetts Institute of Technology
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#ifndef __DSENT_MODEL_ELECTRICAL_DRIVER_MULTIPLIER_H__
#define __DSENT_MODEL_ELECTRICAL_DRIVER_MULTIPLIER_H__

#include "util/CommonType.h"
#include "model/timing_graph/ElectricalTimingNode.h"

namespace DSENT
{
    // Simple class that can be used to mimic the presence of multiple drivers
    // output drivers (each driving one of the downstream loads) when only one
    // such driver has been instantiated (such as models that take advantage of
    // bit duplicattion). When the downsream loads differ in load cap, it
    // just returns the largest of the caps
    class ElectricalDriverMultiplier : public ElectricalTimingNode
    {
        public:
            ElectricalDriverMultiplier(const String& instance_name_, ElectricalModel* model_);
            virtual ~ElectricalDriverMultiplier();

        public:
            // Calculate drive resistance of this node;
            double calculateDriveRes(double input_drive_res_) const;
            // Calculate wiring delay (or net delay)
            double calculateDelay() const;
            // Calculate transition
            double calculateTransition() const;
            // get total amount of downstream load capacitance
            double getTotalDownstreamCap() const;

        private:
            // Disable copy constructor
            ElectricalDriverMultiplier(const ElectricalDriverMultiplier& net_);

        private:
            // Name of this instance
            String m_instance_name_;
    };

} // namespace DSENT

#endif // __DSENT_MODEL_ELECTRICAL_DRIVER_MULTIPLIER_H__