power_domain.hh

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#ifndef __SIM_POWER_DOMAIN_HH__
#define __SIM_POWER_DOMAIN_HH__
 
#include <string>
#include <vector>
 
#include "base/statistics.hh"
#include "params/PowerDomain.hh"
#include "sim/clocked_object.hh"
#include "sim/power_state.hh"
 
namespace gem5
{
 
class PowerDomain : public PowerState
{
  public:
    PowerDomain(const PowerDomainParams &p);
    typedef PowerDomainParams Params;
    ~PowerDomain() override {};
 
    void startup() override;
 
    void pwrStateChangeCallback(enums::PwrState new_pwr_state,
                                PowerState* leader);
 
    void addFollower(PowerState* pwr_obj) override;
 
  private:
    enums::PwrState calculatePowerDomainState(
          const std::vector<enums::PwrState> &f_states={});
 
    bool isPossiblePwrState(enums::PwrState p_state);
 
    void calculatePossiblePwrStates();
 
    void setFollowerPowerStates();
 
  private: /* Power domain attributes */
    std::vector<PowerState*> leaders;
 
    enums::PwrState leaderTargetState;
 
    std::vector<PowerState*> followers;
 
    const Tick updateLatency = 1;
 
    EventWrapper<PowerDomain, &PowerDomain::setFollowerPowerStates>
                pwrStateUpdateEvent;
 
  protected:
    struct PowerDomainStats : public statistics::Group
    {
        PowerDomainStats(PowerDomain &pd);
 
        void regStats() override;
 
        statistics::Scalar numLeaderCalls;
        statistics::Scalar numLeaderCallsChangingState;
    } stats;
};
 
} // namespace gem5
 
#endif // __SIM_POWER_DOMAIN_HH__