a928a438b8
Used cppclean to help identify useless includes and removed them. This involved erroneously included headers, but also cases where forward declarations could have been used rather than a full include.
160 lines
5.4 KiB
C++
160 lines
5.4 KiB
C++
/*
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* Copyright (c) 2012-2014 ARM Limited
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* All rights reserved
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*
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* The license below extends only to copyright in the software and shall
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* not be construed as granting a license to any other intellectual
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* property including but not limited to intellectual property relating
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* to a hardware implementation of the functionality of the software
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* licensed hereunder. You may use the software subject to the license
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* terms below provided that you ensure that this notice is replicated
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* unmodified and in its entirety in all distributions of the software,
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* modified or unmodified, in source code or in binary form.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Vasileios Spiliopoulos
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* Akash Bagdia
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*/
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#include "sim/voltage_domain.hh"
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#include <algorithm>
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#include "base/statistics.hh"
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#include "base/trace.hh"
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#include "debug/VoltageDomain.hh"
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#include "params/VoltageDomain.hh"
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#include "sim/sim_object.hh"
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VoltageDomain::VoltageDomain(const Params *p)
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: SimObject(p), voltageOpPoints(p->voltage), _perfLevel(0)
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{
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fatal_if(voltageOpPoints.empty(), "DVFS: Empty set of voltages for "\
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"voltage domain %s\n", name());
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// Voltages must be sorted in descending order.
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fatal_if(!std::is_sorted(voltageOpPoints.begin(), voltageOpPoints.end(),
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std::greater<Voltages::value_type>()), "DVFS: Voltage operation "\
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"points not in descending order for voltage domain %s\n",
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name());
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}
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void
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VoltageDomain::perfLevel(PerfLevel perf_level)
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{
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chatty_assert(perf_level < voltageOpPoints.size(),
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"DVFS: Requested voltage ID %d is outside the known "\
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"range for domain %s.\n", perf_level, name());
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if (perf_level == _perfLevel) {
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// Silently ignore identical overwrites
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return;
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}
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_perfLevel = perf_level;
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DPRINTF(VoltageDomain, "Setting voltage to %.3fV idx: %d for domain %s\n",
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voltage(), perf_level, name());
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}
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bool
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VoltageDomain::sanitiseVoltages()
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{
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if (numVoltages() == 1)
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return false;
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// Find the highest requested performance level and update the voltage
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// domain with it
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PerfLevel perf_max = (PerfLevel)-1;
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for (auto dit = srcClockChildren.begin(); dit != srcClockChildren.end(); ++dit) {
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SrcClockDomain* d = *dit;
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chatty_assert(d->voltageDomain() == this, "DVFS: Clock domain %s "\
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"(id: %d) should not be registered with voltage domain "\
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"%s\n", d->name(), d->domainID(), name());
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PerfLevel perf = d->perfLevel();
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DPRINTF(VoltageDomain, "DVFS: Clock domain %s (id: %d) requests perf "\
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"level %d\n", d->name(), d->domainID(), perf);
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// NOTE: Descending sort of performance levels: 0 - fast, 5 - slow
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if (perf < perf_max) {
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DPRINTF(VoltageDomain, "DVFS: Updating max perf level %d -> %d\n",
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perf_max, perf);
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perf_max = perf;
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}
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}
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DPRINTF(VoltageDomain, "DVFS: Setting perf level of voltage domain %s "\
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"from %d to %d.\n", name(), perfLevel(), perf_max);
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// Set the performance level
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if (perf_max != perfLevel()) {
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perfLevel(perf_max);
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return true;
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} else {
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return false;
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}
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}
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void
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VoltageDomain::startup() {
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bool changed = sanitiseVoltages();
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if (changed) {
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warn("DVFS: Perf level for voltage domain %s adapted to "\
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"requested perf levels from source clock domains.\n", name());
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}
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}
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void
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VoltageDomain::regStats()
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{
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SimObject::regStats();
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currentVoltage
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.method(this, &VoltageDomain::voltage)
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.name(params()->name + ".voltage")
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.desc("Voltage in Volts")
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;
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}
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VoltageDomain *
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VoltageDomainParams::create()
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{
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return new VoltageDomain(this);
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}
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void
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VoltageDomain::serialize(CheckpointOut &cp) const
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{
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SERIALIZE_SCALAR(_perfLevel);
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}
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void
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VoltageDomain::unserialize(CheckpointIn &cp)
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{
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UNSERIALIZE_SCALAR(_perfLevel);
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perfLevel(_perfLevel);
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}
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