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diff --git a/src/sim/power/mathexpr_powermodel.cc b/src/sim/power/mathexpr_powermodel.cc
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+++ b/src/sim/power/mathexpr_powermodel.cc
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+/*
+ * Copyright (c) 2016 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 "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)
+{
+    // 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)
+            stats_map[i->name.substr(basename.size())] = i;
+}
+
+double
+MathExprPowerModel::getStatValue(const std::string &name) const
+{
+    using namespace Stats;
+
+    // Automatic variables:
+    if (name == "temp")
+        return _temp;
+
+    // Try to cast the stat, only these are supported right now
+    Info *info = stats_map.at(name);
+
+    ScalarInfo *si = dynamic_cast<ScalarInfo*>(info);
+    if (si)
+        return si->value();
+    FormulaInfo *fi = dynamic_cast<FormulaInfo*>(info);
+    if (fi)
+        return fi->total();
+
+    panic("Unknown stat type!\n");
+}
+
+void
+MathExprPowerModel::regStats()
+{
+    PowerModelState::regStats();
+}
+
+MathExprPowerModel*
+MathExprPowerModelParams::create()
+{
+    return new MathExprPowerModel(this);
+}