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/*
* Copyright (c) 2015 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
* not be construed as granting a license to any other intellectual
* property including but not limited to intellectual property relating
* to a hardware implementation of the functionality of the software
* licensed hereunder. You may use the software subject to the license
* terms below provided that you ensure that this notice is replicated
* unmodified and in its entirety in all distributions of the software,
* modified or unmodified, in source code or in binary form.
*
* 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;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* 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
* OWNER 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.
*
* Authors: David Guillen Fandos
*/
#ifndef __SIM_THERMAL_MODEL_HH__
#define __SIM_THERMAL_MODEL_HH__
#include <vector>
#include "base/statistics.hh"
#include "params/ThermalCapacitor.hh"
#include "params/ThermalModel.hh"
#include "params/ThermalReference.hh"
#include "params/ThermalResistor.hh"
#include "sim/clocked_object.hh"
#include "sim/power/thermal_entity.hh"
#include "sim/sim_object.hh"
class ThermalDomain;
/**
* A ThermalNode is used to connect thermal entities, such as
* resistors, capacitors, references and domains. It is the circuital
* equivalent to a voltage node.
*/
class ThermalNode : public SimObject
{
public:
typedef SimObjectParams Params;
ThermalNode(const Params *p);
int id;
bool isref;
double temp;
};
/**
* A ThermalResistor is used to model a thermal resistance between two
* thermal domains. This domains can be either a reference (fixed temp.) or
* a heat producer (power source).
*/
class ThermalResistor : public SimObject, public ThermalEntity
{
public:
typedef ThermalResistorParams Params;
ThermalResistor(const Params *p);
void serialize(CheckpointOut &cp) const override;
void unserialize(CheckpointIn &cp) override;
void setNodes(ThermalNode * n1, ThermalNode * n2) {
node1 = n1;
node2 = n2;
}
LinearEquation getEquation(ThermalNode * tn, unsigned n,
double step) const;
private:
/* Resistance value in K/W */
double _resistance;
/* Nodes connected to the resistor */
ThermalNode * node1, * node2;
};
/**
* A ThermalCapacitor is used to model a thermal capacitance between two
* thermal domains. This domains can be either a reference (fixed temp.) or
* a heat producer (power source).
*/
class ThermalCapacitor : public SimObject, public ThermalEntity
{
public:
typedef ThermalCapacitorParams Params;
ThermalCapacitor(const Params *p);
void serialize(CheckpointOut &cp) const override;
void unserialize(CheckpointIn &cp) override;
LinearEquation getEquation(ThermalNode * tn, unsigned n,
double step) const;
void setNodes(ThermalNode * n1, ThermalNode * n2) {
node1 = n1;
node2 = n2;
}
private:
/* Capacitance value in J/K */
double _capacitance;
/* Nodes connected to the resistor */
ThermalNode * node1, * node2;
};
/**
* A ThermalReference is a thermal domain with fixed temperature.
* It's the homologue to the voltage source in a circuit.
*/
class ThermalReference : public SimObject, public ThermalEntity
{
public:
typedef ThermalReferenceParams Params;
ThermalReference(const Params *p);
void setNode(ThermalNode * n) {
node = n;
}
LinearEquation getEquation(ThermalNode * tn, unsigned n,
double step) const;
void serialize(CheckpointOut &cp) const override;
void unserialize(CheckpointIn &cp) override;
/* Fixed temperature value in centigrate degrees */
double _temperature;
/* Nodes connected to the resistor */
ThermalNode * node;
};
/**
* A ThermalModel is the element which ties all thermal objects
* together and provides the thermal solver to the system.
* It is reponsible for updating temperature for all Thermal
* Domains over time by reading power from simobjects.
*/
class ThermalModel : public ClockedObject
{
public:
typedef ThermalModelParams Params;
ThermalModel(const Params *p);
void addDomain(ThermalDomain * d);
void addReference(ThermalReference * r);
void addCapacitor(ThermalCapacitor * c);
void addResistor(ThermalResistor * r);
void addNode(ThermalNode * n) { nodes.push_back(n); }
double getTemp() const;
void startup();
void doStep();
void serialize(CheckpointOut &cp) const override;
void unserialize(CheckpointIn &cp) override;
private:
/* Keep track of all components used for the thermal model */
std::vector <ThermalDomain *> domains;
std::vector <ThermalReference *> references;
std::vector <ThermalCapacitor *> capacitors;
std::vector <ThermalResistor *> resistors;
std::vector <ThermalEntity *> entities;
/* Keep a list of the instantiated nodes */
std::vector <ThermalNode*> nodes;
std::vector <ThermalNode*> eq_nodes;
/** Stepping event to update the model values */
EventWrapper<ThermalModel, &ThermalModel::doStep> stepEvent;
/** Step in seconds for thermal updates */
double _step;
};
#endif
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