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/*
* Copyright (c) 2016-2017 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_MATHEXPR_POWERMODEL_PM_HH__
#define __SIM_MATHEXPR_POWERMODEL_PM_HH__
#include <unordered_map>
#include "params/MathExprPowerModel.hh"
#include "sim/mathexpr.hh"
#include "sim/power/power_model.hh"
namespace Stats {
class Info;
}
/**
* A Equation power model. The power is represented as a combination
* of some stats and automatic variables (like temperature).
*/
class MathExprPowerModel : public PowerModelState
{
public:
typedef MathExprPowerModelParams Params;
MathExprPowerModel(const Params *p);
/**
* Get the dynamic power consumption.
*
* @return Power (Watts) consumed by this object (dynamic component)
*/
double getDynamicPower() const { return eval(dyn_expr); }
/**
* Get the static power consumption.
*
* @return Power (Watts) consumed by this object (static component)
*/
double getStaticPower() const { return eval(st_expr); }
/**
* Get the value for a variable (maps to a stat)
*
* @param name Name of the variable to retrieve the value from
*
* @return Power (Watts) consumed by this object (static component)
*/
double getStatValue(const std::string & name) const;
void startup();
void regStats();
private:
/**
* Evaluate an expression in the context of this object, fatal if
* evaluation fails.
*
* @param expr Expression to evaluate
* @return Value of expression.
*/
double eval(const MathExpr &expr) const;
/**
* Evaluate an expression in the context of this object, set
* failed if evaluation failed.
*
* @param expr Expression to evaluate
* @return Value of expression.
*/
double tryEval(const MathExpr &expr) const;
// Math expressions for dynamic and static power
MathExpr dyn_expr, st_expr;
// Basename of the object in the gem5 stats hierachy
std::string basename;
// Map that contains relevant stats for this power model
std::unordered_map<std::string, Stats::Info*> stats_map;
// Did the expression fail to evaluate (e.g., because a stat value
// can't be resolved)
mutable bool failed;
};
#endif
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