random_rp.hh revision 12600:e670dd17c8cf
1/** 2 * Copyright (c) 2018 Inria 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Daniel Carvalho 29 */ 30 31/** 32 * @file 33 * Declaration of a random replacement policy. 34 * The victim is chosen at random, if there are no invalid entries. 35 */ 36 37#ifndef __MEM_CACHE_REPLACEMENT_POLICIES_RANDOM_RP_HH__ 38#define __MEM_CACHE_REPLACEMENT_POLICIES_RANDOM_RP_HH__ 39 40#include "mem/cache/replacement_policies/base.hh" 41#include "params/RandomRP.hh" 42 43class RandomRP : public BaseReplacementPolicy 44{ 45 public: 46 /** Convenience typedef. */ 47 typedef RandomRPParams Params; 48 49 /** 50 * Construct and initiliaze this replacement policy. 51 */ 52 RandomRP(const Params *p); 53 54 /** 55 * Destructor. 56 */ 57 ~RandomRP() {} 58 59 /** 60 * Find replacement victim at random. 61 * @param candidates Replacement candidates, selected by indexing policy. 62 * @return Cache block to be replaced. 63 */ 64 CacheBlk* getVictim(const ReplacementCandidates& candidates) override; 65}; 66 67#endif // __MEM_CACHE_REPLACEMENT_POLICIES_RANDOM_RP_HH__ 68