src/cpu/inorder/resource_pool.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_RESOURCE_POOL_HH__
  33 #define __CPU_INORDER_RESOURCE_POOL_HH__
  34
  35 #include <vector>
  36 #include <list>
  37 #include <string>
  38
  39 #include "cpu/inst_seq.hh"
  40 #include "cpu/inorder/inorder_dyn_inst.hh"
  41 #include "cpu/inorder/resource.hh"
  42 #include "cpu/inorder/pipeline_traits.hh"
  43 #include "cpu/inorder/params.hh"
  44 #include "params/InOrderCPU.hh"
  45 #include "cpu/inorder/cpu.hh"
  46 #include "sim/eventq.hh"
  47 #include "sim/sim_object.hh"
  48
  49 class Event;
  50 class InOrderCPU;
  51 class Resource;
  52 class ResourceEvent;
  53
  54 class ResourcePool {
  55   public:
  56     typedef InOrderDynInst::DynInstPtr DynInstPtr;
  57
  58   public:
  59     // List of Resource Pool Events that extends
  60     // the list started by the CPU
  61     // NOTE(1): Resource Pool also uses event list
  62     // CPUEventType defined in inorder/cpu.hh
  63     enum ResPoolEventType {
  64         InstGraduated = InOrderCPU::NumCPUEvents,
  65         SquashAll,
  66         Default
  67     };
  68
  69     class ResPoolEvent : public Event
  70     {
  71       protected:
  72         /** Resource Pool */
  73         ResourcePool *resPool;
  74
  75       public:
  76         InOrderCPU::CPUEventType eventType;
  77
  78         DynInstPtr inst;
  79
  80         InstSeqNum seqNum;
  81
  82         int stageNum;
  83
  84         unsigned tid;
  85
  86       public:
  87         /** Constructs a resource event. */
  88         ResPoolEvent(ResourcePool *_resPool);
  89
  90         /** Set Type of Event To Be Scheduled */
  91         void setEvent(InOrderCPU::CPUEventType e_type,
  92                       DynInstPtr _inst,
  93                       int stage_num,
  94                       InstSeqNum seq_num,
  95                       unsigned _tid)
  96         {
  97             eventType = e_type;
  98             inst = _inst;
  99             seqNum = seq_num;
 100             stageNum = stage_num;
 101             tid = _tid;
 102         }
 103
 104         /** Processes a resource event. */
 105         virtual void process();
 106
 107         /** Returns the description of the resource event. */
 108         const char *description();
 109
 110         /** Schedule Event */
 111         void scheduleEvent(int delay);
 112
 113         /** Unschedule This Event */
 114         void unscheduleEvent();
 115     };
 116
 117   public:
 118   ResourcePool(InOrderCPU *_cpu, ThePipeline::Params *params);
 119     virtual ~ResourcePool() {}
 120
 121     std::string name();
 122
 123     std::string name(int res_idx) { return resources[res_idx]->name(); }
 124
 125     void init();
 126
 127     /** Register Statistics in All Resources */
 128     void regStats();
 129
 130     /** Returns a specific port. */
 131     Port* getPort(const std::string &if_name, int idx);
 132
 133     /** Returns a specific port. */
 134     unsigned getPortIdx(const std::string &if_name);
 135
 136     Resource* getResource(int res_idx) { return resources[res_idx]; }
 137
 138     /** Request usage of this resource. Returns -1 if not granted and
 139      *  a positive request tag if granted.
 140      */
 141     ResReqPtr request(int res_idx, DynInstPtr inst);
 142
 143     /** Squash The Resource */
 144     void squash(DynInstPtr inst, int res_idx, InstSeqNum done_seq_num, int tid);
 145
 146     /** Squash All Resources in Pool after Done Seq. Num */
 147     void squashAll(DynInstPtr inst, int stage_num,
 148                    InstSeqNum done_seq_num, unsigned tid);
 149
 150     /** Activate Thread in all resources */
 151     void activateAll(unsigned tid);
 152
 153     /** De-Activate Thread in all resources */
 154     void deactivateAll(unsigned tid);
 155
 156     /** Broadcast graduation to all resources */
 157     void instGraduated(InstSeqNum seq_num,unsigned tid);
 158
 159     /** The number of instructions available that a resource can
 160      *  can still process.
 161      */
 162     int slotsAvail(int res_idx);
 163
 164     /** The number of instructions using a resource */
 165     int slotsInUse(int res_idx);
 166
 167     /** Schedule resource event, regardless of its current state. */
 168     void scheduleEvent(InOrderCPU::CPUEventType e_type, DynInstPtr inst = NULL,
 169                        int delay = 0, int res_idx = 0, int tid = 0);
 170
 171    /** UnSchedule resource event, regardless of its current state. */
 172     void unscheduleEvent(int res_idx, DynInstPtr inst);
 173
 174     /** Tasks to perform when simulation starts */
 175     virtual void startup() { }
 176
 177     /** The CPU(s) that this resource interacts with */
 178     InOrderCPU *cpu;
 179
 180     DynInstPtr dummyInst[ThePipeline::MaxThreads];
 181
 182   private:
 183     std::vector<Resource *> resources;
 184
 185     std::vector<int> memObjects;
 186
 187 };
 188
 189 #endif //__CPU_INORDER_RESOURCE_HH__