sim/universe.cc

   1 /*
   2  * Copyright (c) 2003 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 #include <sys/types.h>
  30 #include <sys/stat.h>
  31
  32 #include <cstring>
  33 #include <fstream>
  34 #include <list>
  35 #include <string>
  36 #include <vector>
  37
  38 #include "base/misc.hh"
  39 #include "sim/universe.hh"
  40 #include "sim/host.hh"
  41 #include "sim/param.hh"
  42
  43 using namespace std;
  44
  45 Tick curTick = 0;
  46 Tick ticksPerSecond;
  47 double __ticksPerMS;
  48 double __ticksPerUS;
  49 double __ticksPerNS;
  50
  51 string outputDirectory;
  52 ostream *outputStream;
  53
  54 class UniverseParamContext : public ParamContext
  55 {
  56   private:
  57     ofstream outputFile;
  58
  59   public:
  60     UniverseParamContext(const string &is) : ParamContext(is) {}
  61     void checkParams();
  62 };
  63
  64 UniverseParamContext universe("Universe");
  65
  66 Param<Tick> universe_freq(&universe, "frequency", "tick frequency",
  67                           200000000);
  68
  69 Param<string> universe_output_dir(&universe, "output_dir",
  70                                   "directory to output data to");
  71 Param<string> universe_output_file(&universe, "output_file",
  72                                    "file to dump simulator output to");
  73
  74 void
  75 UniverseParamContext::checkParams()
  76 {
  77     ticksPerSecond = universe_freq;
  78     double freq = double(ticksPerSecond);
  79     __ticksPerMS = freq / 1.0e3;
  80     __ticksPerUS = freq / 1.0e6;
  81     __ticksPerNS = freq / 1.0e9;
  82
  83     if (universe_output_dir.isValid()) {
  84         outputDirectory = universe_output_dir;
  85
  86         // guarantee that directory ends with a '/'
  87         if (outputDirectory[outputDirectory.size() - 1] != '/')
  88             outputDirectory += "/";
  89
  90         if (mkdir(outputDirectory.c_str(), 0777) < 0) {
  91             if (errno != EEXIST) {
  92                 panic("%s\ncould not make output directory: %s\n",
  93                       strerror(errno), outputDirectory);
  94             }
  95         }
  96     }
  97
  98     string filename;
  99     if (universe_output_file.isValid()) {
 100         string f = universe_output_file;
 101         if (f != "stdout" && f != "cout" && f != "stderr" && f != "cerr")
 102             filename = outputDirectory + f;
 103         else
 104             filename = f;
 105     } else {
 106         if (outputDirectory.empty())
 107             filename = "stdout";
 108         else
 109             filename = outputDirectory + "output.txt";
 110     }
 111
 112     if (filename == "stdout" || filename == "cout")
 113         outputStream = &cout;
 114     else if (filename == "stderr" || filename == "cerr")
 115         outputStream = &cerr;
 116     else {
 117         outputFile.open(filename.c_str(), ios::trunc);
 118         outputStream = &outputFile;
 119     }
 120 }