thermal_model.hh

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#ifndef __SIM_THERMAL_MODEL_HH__
#define __SIM_THERMAL_MODEL_HH__
 
#include <vector>
 
#include "base/temperature.hh"
#include "sim/clocked_object.hh"
#include "sim/power/thermal_domain.hh"
#include "sim/power/thermal_entity.hh"
#include "sim/power/thermal_node.hh"
#include "sim/sim_object.hh"
 
namespace gem5
{
 
struct ThermalCapacitorParams;
struct ThermalModelParams;
struct ThermalReferenceParams;
struct ThermalResistorParams;
 
class ThermalResistor : public SimObject, public ThermalEntity
{
  public:
    typedef ThermalResistorParams Params;
    ThermalResistor(const Params &p);
 
    void setNodes(ThermalNode * n1, ThermalNode * n2) {
        node1 = n1;
        node2 = n2;
    }
 
    LinearEquation getEquation(ThermalNode * tn, unsigned n,
                               double step) const override;
 
  private:
    /* Resistance value in K/W */
    const double _resistance;
    /* Nodes connected to the resistor */
    ThermalNode * node1, * node2;
};
 
class ThermalCapacitor : public SimObject, public ThermalEntity
{
  public:
    typedef ThermalCapacitorParams Params;
    ThermalCapacitor(const Params &p);
 
    LinearEquation getEquation(ThermalNode * tn, unsigned n,
                               double step) const override;
 
    void setNodes(ThermalNode * n1, ThermalNode * n2) {
        node1 = n1;
        node2 = n2;
    }
 
  private:
    /* Capacitance value in J/K */
    const double _capacitance;
    /* Nodes connected to the resistor */
    ThermalNode * node1, * node2;
};
 
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 override;
 
    /* Fixed temperature value */
    const Temperature _temperature;
    /* Nodes connected to the resistor */
    ThermalNode * node;
};
 
 
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); }
 
    Temperature getTemperature() const;
 
    void startup() override;
    void doStep();
 
  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;
 
    EventFunctionWrapper stepEvent;
 
    const double _step;
};
 
} // namespace gem5
 
#endif