1 files changed, 138 insertions, 0 deletions
diff --git a/src/sim/power/power_model.cc b/src/sim/power/power_model.cc
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+/*
+ * Copyright (c) 2015 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/power_model.hh"
+
+#include "base/statistics.hh"
+#include "params/PowerModel.hh"
+#include "params/PowerModelState.hh"
+#include "sim/sim_object.hh"
+#include "sim/sub_system.hh"
+
+PowerModelState::PowerModelState(const Params *p)
+    : SimObject(p), _temp(0), clocked_object(NULL)
+{
+}
+
+PowerModel::PowerModel(const Params *p)
+    : SimObject(p), states_pm(p->pm), subsystem(p->subsystem),
+      clocked_object(NULL)
+{
+    panic_if(subsystem == NULL,
+             "Subsystem is NULL! This is not acceptable for a PowerModel!\n");
+    subsystem->registerPowerProducer(this);
+}
+
+void
+PowerModel::setClockedObject(ClockedObject * clkobj)
+{
+    this->clocked_object = clkobj;
+
+    for (auto & pms: states_pm)
+        pms->setClockedObject(clkobj);
+}
+
+void
+PowerModel::thermalUpdateCallback(const double & temp)
+{
+    for (auto & pms: states_pm)
+        pms->setTemperature(temp);
+}
+
+void
+PowerModel::regProbePoints()
+{
+    thermalListener.reset(new ThermalProbeListener (
+        *this, this->subsystem->getProbeManager(), "thermalUpdate"
+    ));
+}
+
+PowerModel*
+PowerModelParams::create()
+{
+    return new PowerModel(this);
+}
+
+double
+PowerModel::getDynamicPower() const
+{
+    assert(clocked_object);
+
+    std::vector<double> w = clocked_object->pwrStateWeights();
+
+    // Same number of states (excluding UNDEFINED)
+    assert(w.size() - 1 == states_pm.size());
+
+    // Make sure we have no UNDEFINED state
+    warn_if(w[Enums::PwrState::UNDEFINED] > 0,
+        "SimObject in UNDEFINED power state! Power figures might be wrong!\n");
+
+    double power = 0;
+    for (unsigned i = 0; i < states_pm.size(); i++)
+        if (w[i + 1] > 0.0f)
+            power += states_pm[i]->getDynamicPower() * w[i + 1];
+
+    return power;
+}
+
+double
+PowerModel::getStaticPower() const
+{
+    assert(clocked_object);
+
+    std::vector<double> w = clocked_object->pwrStateWeights();
+
+    // Same number of states (excluding UNDEFINED)
+    assert(w.size() - 1 == states_pm.size());
+
+    // Make sure we have no UNDEFINED state
+    if (w[0] > 0)
+        warn("SimObject in UNDEFINED power state! "
+             "Power figures might be wrong!\n");
+
+    // We have N+1 states, being state #0 the default 'UNDEFINED' state
+    double power = 0;
+    for (unsigned i = 0; i < states_pm.size(); i++)
+        // Don't evaluate power if the object hasn't been in that state
+        // This fixes issues with NaNs and similar.
+        if (w[i + 1] > 0.0f)
+            power += states_pm[i]->getStaticPower() * w[i + 1];
+
+    return power;
+}