src/cpu/inorder/resources/inst_buffer.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_INST_BUFF_UNIT_HH__
  33 #define __CPU_INORDER_INST_BUFF_UNIT_HH__
  34
  35 #include <list>
  36 #include <string>
  37 #include <vector>
  38
  39 #include "cpu/inorder/cpu.hh"
  40 #include "cpu/inorder/inorder_dyn_inst.hh"
  41 #include "cpu/inorder/pipeline_traits.hh"
  42 #include "cpu/inorder/resource.hh"
  43
  44 class InstBuffer : public Resource {
  45   public:
  46     typedef ThePipeline::DynInstPtr DynInstPtr;
  47
  48   public:
  49     enum Command {
  50         InsertInst,
  51         InsertAddr,
  52         RemoveInst,
  53         RemoveAddr,
  54         ScheduleOrBypass
  55     };
  56
  57   public:
  58     InstBuffer(std::string res_name, int res_id, int res_width,
  59                Cycles res_latency, InOrderCPU *_cpu,
  60                ThePipeline::Params *params);
  61
  62     void regStats();
  63
  64     void execute(int slot_num);
  65
  66     void insert(DynInstPtr inst);
  67
  68     void remove(DynInstPtr inst);
  69
  70     void pop(ThreadID tid);
  71
  72     DynInstPtr top(ThreadID tid);
  73
  74     void squash(DynInstPtr inst, int stage_num,
  75                         InstSeqNum squash_seq_num, ThreadID tid);
  76   protected:
  77     /** List of instructions this resource is currently
  78      *  processing.
  79      */
  80     std::list<DynInstPtr> instList;
  81
  82   public:
  83     /////////////////////////////////////////////////////////////////
  84     //
  85     // RESOURCE STATISTICS
  86     //
  87     /////////////////////////////////////////////////////////////////
  88     /** Number of Instruction Requests the Resource Processes */
  89     Stats::Scalar instsBypassed;
  90
  91 };
  92
  93 #endif //__CPU_INORDER_INST_BUFF_UNIT_HH__