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Diffstat (limited to 'src/mem/cache/prefetch/multi.cc')
-rw-r--r-- | src/mem/cache/prefetch/multi.cc | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/src/mem/cache/prefetch/multi.cc b/src/mem/cache/prefetch/multi.cc new file mode 100644 index 000000000..02cb6cfca --- /dev/null +++ b/src/mem/cache/prefetch/multi.cc @@ -0,0 +1,88 @@ +/* + * Copyright (c) 2014, 2019 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: Mitch Hayenga + * Andreas Sandberg + */ + +#include "mem/cache/prefetch/multi.hh" + +#include "params/MultiPrefetcher.hh" + +MultiPrefetcher::MultiPrefetcher(const MultiPrefetcherParams *p) + : BasePrefetcher(p), + prefetchers(p->prefetchers.begin(), p->prefetchers.end()) +{ +} + +void +MultiPrefetcher::setCache(BaseCache *_cache) +{ + for (auto pf : prefetchers) + pf->setCache(_cache); +} + +Tick +MultiPrefetcher::nextPrefetchReadyTime() const +{ + Tick next_ready = MaxTick; + + for (auto pf : prefetchers) + next_ready = std::min(next_ready, pf->nextPrefetchReadyTime()); + + return next_ready; +} + +PacketPtr +MultiPrefetcher::getPacket() +{ + for (auto pf : prefetchers) { + if (pf->nextPrefetchReadyTime() <= curTick()) { + PacketPtr pkt = pf->getPacket(); + panic_if(!pkt, "Prefetcher is ready but didn't return a packet."); + return pkt; + } + } + + return nullptr; +} + + +MultiPrefetcher* +MultiPrefetcherParams::create() +{ + return new MultiPrefetcher(this); +} |