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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
*/
#include "sim/power/mathexpr_powermodel.hh"
#include <string>
#include "base/statistics.hh"
#include "params/MathExprPowerModel.hh"
#include "sim/mathexpr.hh"
#include "sim/power/thermal_model.hh"
#include "sim/sim_object.hh"
MathExprPowerModel::MathExprPowerModel(const Params *p)
: PowerModelState(p), dyn_expr(p->dyn), st_expr(p->st), failed(false)
{
// Calculate the name of the object we belong to
std::vector<std::string> path;
tokenize(path, name(), '.', true);
// It's something like xyz.power_model.pm2
assert(path.size() > 2);
for (unsigned i = 0; i < path.size() - 2; i++)
basename += path[i] + ".";
}
void
MathExprPowerModel::startup()
{
// Create a map with stats and pointers for quick access
// Has to be done here, since we need access to the statsList
for (auto & i: Stats::statsList()) {
if (i->name.find(basename) == 0) {
// Add stats for this sim object and its child objects
stats_map[i->name.substr(basename.size())] = i;
} else if (i->name.find(".") == std::string::npos) {
// Add global stats (sim_seconds, for example)
stats_map[i->name] = i;
}
}
tryEval(st_expr);
const bool st_failed = failed;
tryEval(dyn_expr);
const bool dyn_failed = failed;
if (st_failed || dyn_failed) {
const auto *p = dynamic_cast<const Params *>(params());
assert(p);
fatal("Failed to evaluate power expressions:\n%s%s%s\n",
st_failed ? p->st : "",
st_failed && dyn_failed ? "\n" : "",
dyn_failed ? p->dyn : "");
}
}
double
MathExprPowerModel::eval(const MathExpr &expr) const
{
const double value = tryEval(expr);
// This shouldn't happen unless something went wrong the equations
// were verified in startup().
panic_if(failed, "Failed to evaluate power expression '%s'\n",
expr.toStr());
return value;
}
double
MathExprPowerModel::tryEval(const MathExpr &expr) const
{
failed = false;
const double value = expr.eval(
std::bind(&MathExprPowerModel::getStatValue,
this, std::placeholders::_1)
);
return value;
}
double
MathExprPowerModel::getStatValue(const std::string &name) const
{
using namespace Stats;
// Automatic variables:
if (name == "temp") {
return _temp;
} else if (name == "voltage") {
return clocked_object->voltage();
} else if (name=="clock_period") {
return clocked_object->clockPeriod();
}
// Try to cast the stat, only these are supported right now
const auto it = stats_map.find(name);
if (it == stats_map.cend()) {
warn("Failed to find stat '%s'\n", name);
failed = true;
return 0;
}
const Info *info = it->second;
auto si = dynamic_cast<const ScalarInfo *>(info);
if (si)
return si->value();
auto fi = dynamic_cast<const FormulaInfo *>(info);
if (fi)
return fi->total();
panic("Unknown stat type!\n");
}
void
MathExprPowerModel::regStats()
{
PowerModelState::regStats();
}
MathExprPowerModel*
MathExprPowerModelParams::create()
{
return new MathExprPowerModel(this);
}
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