diff options
Diffstat (limited to 'src/mem/cache/replacement_policies/fifo_rp.cc')
-rw-r--r-- | src/mem/cache/replacement_policies/fifo_rp.cc | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/src/mem/cache/replacement_policies/fifo_rp.cc b/src/mem/cache/replacement_policies/fifo_rp.cc new file mode 100644 index 000000000..fd320be83 --- /dev/null +++ b/src/mem/cache/replacement_policies/fifo_rp.cc @@ -0,0 +1,69 @@ +/** + * Copyright (c) 2018 Inria + * All rights reserved. + * + * 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: Daniel Carvalho + */ + +#include "mem/cache/replacement_policies/fifo_rp.hh" + +#include "debug/CacheRepl.hh" + +FIFORP::FIFORP(const Params *p) + : BaseReplacementPolicy(p) +{ +} + +CacheBlk* +FIFORP::getVictim(const ReplacementCandidates& candidates) +{ + // There must be at least one replacement candidate + assert(candidates.size() > 0); + + // Visit all candidates to find victim + CacheBlk* blk = candidates[0]; + for (const auto& candidate : candidates) { + // Stop iteration if found an invalid block + if (!candidate->isValid()) { + blk = candidate; + break; + // Update victim block if necessary + } else if (candidate->tickInserted < blk->tickInserted) { + blk = candidate; + } + } + + DPRINTF(CacheRepl, "set %x, way %x: selecting blk for replacement\n", + blk->set, blk->way); + + return blk; +} + +FIFORP* +FIFORPParams::create() +{ + return new FIFORP(this); +} |