src/cpu/trace/reader/ibm_reader.cc

   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 /**
  30  * @file
  31  * Declaration of a IBM memory trace format reader.
  32  */
  33 #include <sstream>
  34
  35 #include "cpu/trace/reader/ibm_reader.hh"
  36 #include "sim/builder.hh"
  37 #include "base/misc.hh" // for fatal
  38
  39 using namespace std;
  40
  41 IBMReader::IBMReader(const string &name, const string &filename)
  42     : MemTraceReader(name)
  43 {
  44     if (strcmp((filename.c_str() + filename.length() -3), ".gz") == 0) {
  45         // Compressed file, need to use a pipe to gzip.
  46         stringstream buf;
  47         buf << "gzip -d -c " << filename << endl;
  48         trace = popen(buf.str().c_str(), "r");
  49     } else {
  50         trace = fopen(filename.c_str(), "rb");
  51     }
  52     if (!trace) {
  53         fatal("Can't open file %s", filename);
  54     }
  55 }
  56
  57 Tick
  58 IBMReader::getNextReq(MemReqPtr &req)
  59 {
  60     MemReqPtr tmp_req;
  61
  62     int c = getc(trace);
  63     if (c != EOF) {
  64         tmp_req = new MemReq();
  65         //int cpu_id = (c & 0xf0) >> 4;
  66         int type = c & 0x0f;
  67         // We have L1 miss traces, so all accesses are 128 bytes
  68         tmp_req->size = 128;
  69
  70         tmp_req->paddr = 0;
  71         for (int i = 2; i >= 0; --i) {
  72             c = getc(trace);
  73             if (c == EOF) {
  74                 fatal("Unexpected end of file");
  75             }
  76             tmp_req->paddr |= ((c & 0xff) << (8 * i));
  77         }
  78         tmp_req->paddr = tmp_req->paddr << 7;
  79
  80         switch(type) {
  81           case IBM_COND_EXCLUSIVE_FETCH:
  82           case IBM_READ_ONLY_FETCH:
  83             tmp_req->cmd = Read;
  84             break;
  85           case IBM_EXCLUSIVE_FETCH:
  86           case IBM_FETCH_NO_DATA:
  87             tmp_req->cmd = Write;
  88             break;
  89           case IBM_INST_FETCH:
  90             tmp_req->cmd = Read;
  91             break;
  92           default:
  93             fatal("Unknown trace entry type.");
  94         }
  95
  96     }
  97     req = tmp_req;
  98     return 0;
  99 }
 100
 101 BEGIN_DECLARE_SIM_OBJECT_PARAMS(IBMReader)
 102
 103     Param<string> filename;
 104
 105 END_DECLARE_SIM_OBJECT_PARAMS(IBMReader)
 106
 107
 108 BEGIN_INIT_SIM_OBJECT_PARAMS(IBMReader)
 109
 110     INIT_PARAM(filename, "trace file")
 111
 112 END_INIT_SIM_OBJECT_PARAMS(IBMReader)
 113
 114
 115 CREATE_SIM_OBJECT(IBMReader)
 116 {
 117     return new IBMReader(getInstanceName(), filename);
 118 }
 119
 120 REGISTER_SIM_OBJECT("IBMReader", IBMReader)