diff options
Diffstat (limited to 'src/mem/cache/replacement_policies/fifo_rp.hh')
-rw-r--r-- | src/mem/cache/replacement_policies/fifo_rp.hh | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/src/mem/cache/replacement_policies/fifo_rp.hh b/src/mem/cache/replacement_policies/fifo_rp.hh new file mode 100644 index 000000000..16493711c --- /dev/null +++ b/src/mem/cache/replacement_policies/fifo_rp.hh @@ -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 + */ + +/** + * @file + * Declaration of a First In First Out replacement policy. + * The victim is chosen using the timestamp. The oldest block is always chosen + * to be evicted, regardless of the amount of times it has been touched. + */ + +#ifndef __MEM_CACHE_REPLACEMENT_POLICIES_FIFO_RP_HH__ +#define __MEM_CACHE_REPLACEMENT_POLICIES_FIFO_RP_HH__ + +#include "mem/cache/replacement_policies/base.hh" +#include "params/FIFORP.hh" + +class FIFORP : public BaseReplacementPolicy +{ + public: + /** Convenience typedef. */ + typedef FIFORPParams Params; + + /** + * Construct and initiliaze this replacement policy. + */ + FIFORP(const Params *p); + + /** + * Destructor. + */ + ~FIFORP() {} + + /** + * Find replacement victim using insertion timestamps. + * + * @param cands Replacement candidates, selected by indexing policy. + * @return Cache block to be replaced. + */ + CacheBlk* getVictim(const ReplacementCandidates& cands) override; +}; + +#endif // __MEM_CACHE_REPLACEMENT_POLICIES_FIFO_RP_HH__ |