deriv.cc revision 5597 
1/*
2 * Copyright (c) 2004-2006 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 * Authors: Kevin Lim
29 */
30
31#include <string>
32
33#include "config/full_system.hh"
34#include "config/use_checker.hh"
35#include "cpu/o3/cpu.hh"
36#include "cpu/o3/impl.hh"
37#include "params/DerivO3CPU.hh"
38
39class DerivO3CPU : public FullO3CPU<O3CPUImpl>
40{
41  public:
42    DerivO3CPU(DerivO3CPUParams *p)
43        : FullO3CPU<O3CPUImpl>(p)
44    { }
45};
46
47DerivO3CPU *
48DerivO3CPUParams::create()
49{
50#if FULL_SYSTEM
51    // Full-system only supports a single thread for the moment.
52    int actual_num_threads = 1;
53#else
54    // In non-full-system mode, we infer the number of threads from
55    // the workload if it's not explicitly specified.
56    int actual_num_threads =
57        (numThreads >= workload.size()) ? numThreads : workload.size();
58
59    if (workload.size() == 0) {
60        fatal("Must specify at least one workload!");
61    }
62#endif
63
64    numThreads = actual_num_threads;
65
66    // Default smtFetchPolicy to "RoundRobin", if necessary.
67    std::string round_robin_policy = "RoundRobin";
68    std::string single_thread = "SingleThread";
69
70    if (actual_num_threads > 1 && single_thread.compare(smtFetchPolicy) == 0)
71        smtFetchPolicy = round_robin_policy;
72    else
73        smtFetchPolicy = smtFetchPolicy;
74
75    instShiftAmt = 2;
76
77    return new DerivO3CPU(this);
78}
79