2 * Copyright (c) 2007 Mark D. Hill and David A. Wood
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14 * this software without specific prior written permission.
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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29 #ifndef __MEM_RUBY_SYSTEM_ABSTRACTREPLACEMENTPOLICY_HH__
30 #define __MEM_RUBY_SYSTEM_ABSTRACTREPLACEMENTPOLICY_HH__
32 #include "base/types.hh"
34 class AbstractReplacementPolicy
37 AbstractReplacementPolicy(int64 num_sets, int64 assoc);
38 virtual ~AbstractReplacementPolicy();
40 /* touch a block. a.k.a. update timestamp */
41 virtual void touch(int64 set, int64 way, Tick time) = 0;
43 /* returns the way to replace */
44 virtual int64 getVictim(int64 set) const = 0;
46 /* get the time of the last access */
47 Tick getLastAccess(int64 set, int64 way);
50 unsigned m_num_sets; /** total number of sets */
51 unsigned m_assoc; /** set associativity */
52 Tick **m_last_ref_ptr; /** timestamp of last reference */
56 AbstractReplacementPolicy::AbstractReplacementPolicy(int64 num_sets,
59 m_num_sets = num_sets;
61 m_last_ref_ptr = new Tick*[m_num_sets];
62 for(unsigned i = 0; i < m_num_sets; i++){
63 m_last_ref_ptr[i] = new Tick[m_assoc];
64 for(unsigned j = 0; j < m_assoc; j++){
65 m_last_ref_ptr[i][j] = 0;
71 AbstractReplacementPolicy::~AbstractReplacementPolicy()
73 if (m_last_ref_ptr != NULL){
74 for (unsigned i = 0; i < m_num_sets; i++){
75 if (m_last_ref_ptr[i] != NULL){
76 delete[] m_last_ref_ptr[i];
79 delete[] m_last_ref_ptr;
84 AbstractReplacementPolicy::getLastAccess(int64 set, int64 way)
86 return m_last_ref_ptr[set][way];
89 #endif // __MEM_RUBY_SYSTEM_ABSTRACTREPLACEMENTPOLICY_HH__