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 double __ticksPerPS;
  51
  52 string outputDirectory;
  53 ostream *outputStream;
  54
  55 class UniverseParamContext : public ParamContext
  56 {
  57   private:
  58     ofstream outputFile;
  59
  60   public:
  61     UniverseParamContext(const string &is) : ParamContext(is) {}
  62     void checkParams();
  63 };
  64
  65 UniverseParamContext universe("Universe");
  66
  67 Param<Tick> universe_freq(&universe, "frequency", "tick frequency",
  68                           200000000);
  69
  70 Param<string> universe_output_dir(&universe, "output_dir",
  71                                   "directory to output data to");
  72 Param<string> universe_output_file(&universe, "output_file",
  73                                    "file to dump simulator output to");
  74
  75 void
  76 UniverseParamContext::checkParams()
  77 {
  78     ticksPerSecond = universe_freq;
  79     double freq = double(ticksPerSecond);
  80     __ticksPerMS = freq / 1.0e3;
  81     __ticksPerUS = freq / 1.0e6;
  82     __ticksPerNS = freq / 1.0e9;
  83     __ticksPerPS = freq / 1.0e12;
  84
  85     if (universe_output_dir.isValid()) {
  86         outputDirectory = universe_output_dir;
  87
  88         // guarantee that directory ends with a '/'
  89         if (outputDirectory[outputDirectory.size() - 1] != '/')
  90             outputDirectory += "/";
  91
  92         if (mkdir(outputDirectory.c_str(), 0777) < 0) {
  93             if (errno != EEXIST) {
  94                 panic("%s\ncould not make output directory: %s\n",
  95                       strerror(errno), outputDirectory);
  96             }
  97         }
  98     }
  99
 100     string filename;
 101     if (universe_output_file.isValid()) {
 102         string f = universe_output_file;
 103         if (f != "stdout" && f != "cout" && f != "stderr" && f != "cerr")
 104             filename = outputDirectory + f;
 105         else
 106             filename = f;
 107     } else {
 108         if (outputDirectory.empty())
 109             filename = "stdout";
 110         else
 111             filename = outputDirectory + "output.txt";
 112     }
 113
 114     if (filename == "stdout" || filename == "cout")
 115         outputStream = &cout;
 116     else if (filename == "stderr" || filename == "cerr")
 117         outputStream = &cerr;
 118     else {
 119         outputFile.open(filename.c_str(), ios::trunc);
 120         outputStream = &outputFile;
 121     }
 122 }