AbstractReplacementPolicy.hh (10301:44839e8febbd) AbstractReplacementPolicy.hh (10314:94b6b28fc968)
1/*
2 * Copyright (c) 2007 Mark D. Hill and David A. Wood
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;

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29#ifndef __MEM_RUBY_SYSTEM_ABSTRACTREPLACEMENTPOLICY_HH__
30#define __MEM_RUBY_SYSTEM_ABSTRACTREPLACEMENTPOLICY_HH__
31
32#include "base/types.hh"
33
34class AbstractReplacementPolicy
35{
36 public:
1/*
2 * Copyright (c) 2007 Mark D. Hill and David A. Wood
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;

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29#ifndef __MEM_RUBY_SYSTEM_ABSTRACTREPLACEMENTPOLICY_HH__
30#define __MEM_RUBY_SYSTEM_ABSTRACTREPLACEMENTPOLICY_HH__
31
32#include "base/types.hh"
33
34class AbstractReplacementPolicy
35{
36 public:
37 AbstractReplacementPolicy(Index num_sets, Index assoc);
37 AbstractReplacementPolicy(int64 num_sets, int64 assoc);
38 virtual ~AbstractReplacementPolicy();
39
40 /* touch a block. a.k.a. update timestamp */
38 virtual ~AbstractReplacementPolicy();
39
40 /* touch a block. a.k.a. update timestamp */
41 virtual void touch(Index set, Index way, Tick time) = 0;
41 virtual void touch(int64 set, int64 way, Tick time) = 0;
42
43 /* returns the way to replace */
42
43 /* returns the way to replace */
44 virtual Index getVictim(Index set) const = 0;
44 virtual int64 getVictim(int64 set) const = 0;
45
46 /* get the time of the last access */
45
46 /* get the time of the last access */
47 Tick getLastAccess(Index set, Index way);
47 Tick getLastAccess(int64 set, int64 way);
48
49 protected:
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 */
53};
54
55inline
48
49 protected:
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 */
53};
54
55inline
56AbstractReplacementPolicy::AbstractReplacementPolicy(Index num_sets,
57 Index assoc)
56AbstractReplacementPolicy::AbstractReplacementPolicy(int64 num_sets,
57 int64 assoc)
58{
59 m_num_sets = num_sets;
60 m_assoc = assoc;
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;

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76 delete[] m_last_ref_ptr[i];
77 }
78 }
79 delete[] m_last_ref_ptr;
80 }
81}
82
83inline Tick
58{
59 m_num_sets = num_sets;
60 m_assoc = assoc;
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;

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76 delete[] m_last_ref_ptr[i];
77 }
78 }
79 delete[] m_last_ref_ptr;
80 }
81}
82
83inline Tick
84AbstractReplacementPolicy::getLastAccess(Index set, Index way)
84AbstractReplacementPolicy::getLastAccess(int64 set, int64 way)
85{
86 return m_last_ref_ptr[set][way];
87}
88
89#endif // __MEM_RUBY_SYSTEM_ABSTRACTREPLACEMENTPOLICY_HH__
85{
86 return m_last_ref_ptr[set][way];
87}
88
89#endif // __MEM_RUBY_SYSTEM_ABSTRACTREPLACEMENTPOLICY_HH__