WeightedLRUPolicy.hh revision 12697 
1/*
2 * Copyright (c) 2013-2015 Advanced Micro Devices, Inc.
3 * All rights reserved.
4 *
5 * For use for simulation and test purposes only
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright notice,
14 * this list of conditions and the following disclaimer in the documentation
15 * and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of the copyright holder nor the names of its
18 * contributors may be used to endorse or promote products derived from this
19 * software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
25 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
32 *
33 * Authors: Sooraj Puthoor
34 */
35
36#ifndef __MEM_RUBY_SYSTEM_WEIGHTEDLRUPOLICY_HH__
37#define __MEM_RUBY_SYSTEM_WEIGHTEDLRUPOLICY_HH__
38
39#include "mem/ruby/structures/AbstractReplacementPolicy.hh"
40#include "mem/ruby/structures/CacheMemory.hh"
41#include "params/WeightedLRUReplacementPolicy.hh"
42
43/* Simple true LRU replacement policy */
44
45class WeightedLRUPolicy : public AbstractReplacementPolicy
46{
47  public:
48    typedef WeightedLRUReplacementPolicyParams Params;
49    WeightedLRUPolicy(const Params* p);
50    ~WeightedLRUPolicy();
51
52    void touch(int64_t set, int64_t way, Tick time) override;
53    void touch(int64_t set, int64_t way, Tick time, int occupancy);
54    int64_t getVictim(int64_t set) const override;
55
56    bool useOccupancy() const override { return true; }
57
58    CacheMemory * m_cache;
59    int **m_last_occ_ptr;
60};
61
62#endif // __MEM_RUBY_SYSTEM_WeightedLRUPolicy_HH__
63