AbstractReplacementPolicy.hh revision 10970
112922Sgabeblack@google.com/* 212922Sgabeblack@google.com * Copyright (c) 2007 Mark D. Hill and David A. Wood 312922Sgabeblack@google.com * All rights reserved. 412922Sgabeblack@google.com * 512922Sgabeblack@google.com * Redistribution and use in source and binary forms, with or without 612922Sgabeblack@google.com * modification, are permitted provided that the following conditions are 712922Sgabeblack@google.com * met: redistributions of source code must retain the above copyright 812922Sgabeblack@google.com * notice, this list of conditions and the following disclaimer; 912922Sgabeblack@google.com * redistributions in binary form must reproduce the above copyright 1012922Sgabeblack@google.com * notice, this list of conditions and the following disclaimer in the 1112922Sgabeblack@google.com * documentation and/or other materials provided with the distribution; 1212922Sgabeblack@google.com * neither the name of the copyright holders nor the names of its 1312922Sgabeblack@google.com * contributors may be used to endorse or promote products derived from 1412922Sgabeblack@google.com * this software without specific prior written permission. 1512922Sgabeblack@google.com * 1612922Sgabeblack@google.com * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 1712922Sgabeblack@google.com * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 1812922Sgabeblack@google.com * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 1912922Sgabeblack@google.com * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 2012922Sgabeblack@google.com * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 2112922Sgabeblack@google.com * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 2212922Sgabeblack@google.com * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2312922Sgabeblack@google.com * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2412922Sgabeblack@google.com * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2512922Sgabeblack@google.com * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 2612922Sgabeblack@google.com * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2712922Sgabeblack@google.com */ 2812922Sgabeblack@google.com 2912922Sgabeblack@google.com#ifndef __MEM_RUBY_STRUCTURES_ABSTRACTREPLACEMENTPOLICY_HH__ 3012922Sgabeblack@google.com#define __MEM_RUBY_STRUCTURES_ABSTRACTREPLACEMENTPOLICY_HH__ 3112922Sgabeblack@google.com 3212922Sgabeblack@google.com#include "base/types.hh" 3312922Sgabeblack@google.com#include "mem/ruby/common/TypeDefines.hh" 3412922Sgabeblack@google.com#include "params/ReplacementPolicy.hh" 3512922Sgabeblack@google.com#include "sim/sim_object.hh" 3612922Sgabeblack@google.com 3712922Sgabeblack@google.comclass AbstractReplacementPolicy : public SimObject 3812922Sgabeblack@google.com{ 3912922Sgabeblack@google.com public: 4012922Sgabeblack@google.com typedef ReplacementPolicyParams Params; 4112922Sgabeblack@google.com AbstractReplacementPolicy(const Params * p); 4212922Sgabeblack@google.com virtual ~AbstractReplacementPolicy(); 4312922Sgabeblack@google.com 4412922Sgabeblack@google.com /* touch a block. a.k.a. update timestamp */ 4512922Sgabeblack@google.com virtual void touch(int64 set, int64 way, Tick time) = 0; 4612922Sgabeblack@google.com 4712922Sgabeblack@google.com /* returns the way to replace */ 4812922Sgabeblack@google.com virtual int64 getVictim(int64 set) const = 0; 4912922Sgabeblack@google.com 5012922Sgabeblack@google.com /* get the time of the last access */ 5112922Sgabeblack@google.com Tick getLastAccess(int64 set, int64 way); 5212922Sgabeblack@google.com 5312922Sgabeblack@google.com virtual bool useOccupancy() const { return false; } 5412922Sgabeblack@google.com 5512922Sgabeblack@google.com protected: 5612922Sgabeblack@google.com unsigned m_num_sets; /** total number of sets */ 5712922Sgabeblack@google.com unsigned m_assoc; /** set associativity */ 5812922Sgabeblack@google.com Tick **m_last_ref_ptr; /** timestamp of last reference */ 5912922Sgabeblack@google.com}; 6012922Sgabeblack@google.com 6112922Sgabeblack@google.com#endif // __MEM_RUBY_STRUCTURES_ABSTRACTREPLACEMENTPOLICY_HH__ 6212922Sgabeblack@google.com