deriv.cc revision 8793 
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    ThreadID actual_num_threads;
51    if (FullSystem) {
52        // Full-system only supports a single thread for the moment.
53        actual_num_threads = 1;
54    } else {
55        if (workload.size() > numThreads) {
56            fatal("Workload Size (%i) > Max Supported Threads (%i) on This CPU",
57                  workload.size(), numThreads);
58        } else if (workload.size() == 0) {
59            fatal("Must specify at least one workload!");
60        }
61
62        // In non-full-system mode, we infer the number of threads from
63        // the workload if it's not explicitly specified.
64        actual_num_threads =
65            (numThreads >= workload.size()) ? numThreads : workload.size();
66    }
67
68    numThreads = actual_num_threads;
69
70    // Default smtFetchPolicy to "RoundRobin", if necessary.
71    std::string round_robin_policy = "RoundRobin";
72    std::string single_thread = "SingleThread";
73
74    if (actual_num_threads > 1 && single_thread.compare(smtFetchPolicy) == 0)
75        smtFetchPolicy = round_robin_policy;
76    else
77        smtFetchPolicy = smtFetchPolicy;
78
79    instShiftAmt = 2;
80
81    return new DerivO3CPU(this);
82}
83