store_set.hh revision 1689 
1/*
2 * Copyright (c) 2004-2005 The Regents of The University of Michigan
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
29#ifndef __CPU_BETA_CPU_STORE_SET_HH__
30#define __CPU_BETA_CPU_STORE_SET_HH__
31
32#include <vector>
33
34#include "arch/alpha/isa_traits.hh"
35#include "cpu/inst_seq.hh"
36
37class StoreSet
38{
39  public:
40    typedef unsigned SSID;
41
42  public:
43    StoreSet(int SSIT_size, int LFST_size);
44
45    void violation(Addr store_PC, Addr load_PC);
46
47    void insertLoad(Addr load_PC, InstSeqNum load_seq_num);
48
49    void insertStore(Addr store_PC, InstSeqNum store_seq_num);
50
51    InstSeqNum checkInst(Addr PC);
52
53    void issued(Addr issued_PC, InstSeqNum issued_seq_num, bool is_store);
54
55    void squash(InstSeqNum squashed_num);
56
57    void clear();
58
59  private:
60    inline int calcIndex(Addr PC)
61    { return (PC >> offset_bits) & index_mask; }
62
63    inline SSID calcSSID(Addr PC)
64    { return ((PC ^ (PC >> 10)) % LFST_size); }
65
66    SSID *SSIT;
67
68    std::vector<bool> validSSIT;
69
70    InstSeqNum *LFST;
71
72    std::vector<bool> validLFST;
73
74    int *SSCounters;
75
76    int SSIT_size;
77
78    int LFST_size;
79
80    int index_mask;
81
82    // HACK: Hardcoded for now.
83    int offset_bits;
84};
85
86#endif // __CPU_BETA_CPU_STORE_SET_HH__
87