src/cpu/inorder/resources/execution_unit.hh

   1 /*
   2  * Copyright (c) 2007 MIPS Technologies, Inc.
   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: Korey Sewell
  29  *
  30  */
  31
  32 #ifndef __CPU_INORDER_EXECUTION_UNIT_HH__
  33 #define __CPU_INORDER_EXECUTION_UNIT_HH__
  34
  35 #include <list>
  36 #include <string>
  37 #include <vector>
  38
  39 #include "cpu/inorder/first_stage.hh"
  40 #include "cpu/inorder/inorder_dyn_inst.hh"
  41 #include "cpu/inorder/resource.hh"
  42 #include "cpu/func_unit.hh"
  43
  44 class ExecutionUnit : public Resource {
  45   public:
  46     typedef ThePipeline::DynInstPtr DynInstPtr;
  47
  48     enum Command {
  49         ExecuteInst
  50     };
  51
  52   public:
  53     ExecutionUnit(std::string res_name, int res_id, int res_width,
  54                   Cycles res_latency, InOrderCPU *_cpu,
  55                   ThePipeline::Params *params);
  56
  57   public:
  58     void regStats();
  59
  60     /** Execute the function of this resource. The Default is action
  61      *  is to do nothing. More specific models will derive from this
  62      *  class and define their own execute function.
  63      */
  64     void execute(int slot_num);
  65
  66   protected:
  67     /////////////////////////////////////////////////////////////////
  68     //
  69     // RESOURCE STATISTICS
  70     //
  71     /////////////////////////////////////////////////////////////////
  72     Stats::Scalar predictedTakenIncorrect;
  73     Stats::Scalar predictedNotTakenIncorrect;
  74     Stats::Scalar predictedIncorrect;
  75     Stats::Scalar predictedCorrect;
  76     Stats::Formula mispredictPct;
  77     Stats::Scalar executions;
  78     Tick lastExecuteTick;
  79     Tick lastControlTick;
  80 };
  81
  82
  83 #endif //__CPU_INORDER_EXCUTION_UNIT_HH__