/*
 * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
 * Copyright (c) 2009 Advanced Micro Devices, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met: redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer;
 * redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution;
 * neither the name of the copyright holders nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef __CPU_RUBYTEST_RUBYTESTER_HH__
#define __CPU_RUBYTEST_RUBYTESTER_HH__

#include <iostream>
#include <string>
#include <vector>

#include "cpu/testers/rubytest/CheckTable.hh"
#include "mem/ruby/common/Global.hh"
#include "mem/ruby/common/SubBlock.hh"
#include "mem/ruby/system/RubyPort.hh"
#include "mem/mem_object.hh"
#include "mem/packet.hh"
#include "params/RubyTester.hh"

class RubyTester : public MemObject
{
  public:
    class CpuPort : public MasterPort
    {
      private:
        RubyTester *tester;

      public:
        //
        // Currently, each instatiation of the RubyTester::CpuPort supports
        // only instruction or data requests, not both.  However, for those
        // RubyPorts that support both types of requests, separate InstOnly
        // and DataOnly CpuPorts will map to that RubyPort

        CpuPort(const std::string &_name, RubyTester *_tester, PortID _id)
            : MasterPort(_name, _tester, _id), tester(_tester)
        {}

      protected:
        virtual bool recvTimingResp(PacketPtr pkt);
        virtual void recvRetry()
        { panic("%s does not expect a retry\n", name()); }
    };

    struct SenderState : public Packet::SenderState
    {
        SubBlock* subBlock;
        Packet::SenderState *saved;

        SenderState(Address addr, int size,
                    Packet::SenderState *sender_state = NULL)
            : saved(sender_state)
        {
            subBlock = new SubBlock(addr, size);
        }

        ~SenderState()
        {
            delete subBlock;
        }
    };

    typedef RubyTesterParams Params;
    RubyTester(const Params *p);
    ~RubyTester();

    virtual MasterPort &getMasterPort(const std::string &if_name,
                                      int idx = -1);

    bool isInstReadableCpuPort(int idx);

    MasterPort* getReadableCpuPort(int idx);
    MasterPort* getWritableCpuPort(int idx);

    virtual void init();

    void wakeup();

    void incrementCheckCompletions() { m_checks_completed++; }

    void printStats(std::ostream& out) const {}
    void clearStats() {}
    void printConfig(std::ostream& out) const {}

    void print(std::ostream& out) const;
    bool getCheckFlush() { return m_check_flush; }

    MasterID masterId() { return _masterId; }
  protected:
    class CheckStartEvent : public Event
    {
      private:
        RubyTester *tester;

      public:
        CheckStartEvent(RubyTester *_tester)
            : Event(CPU_Tick_Pri), tester(_tester)
        {}
        void process() { tester->wakeup(); }
        virtual const char *description() const { return "RubyTester tick"; }
    };

    CheckStartEvent checkStartEvent;

    MasterID _masterId;

  private:
    void hitCallback(NodeID proc, SubBlock* data);

    void checkForDeadlock();

    // Private copy constructor and assignment operator
    RubyTester(const RubyTester& obj);
    RubyTester& operator=(const RubyTester& obj);

    CheckTable* m_checkTable_ptr;
    std::vector<Time> m_last_progress_vector;

    int m_num_cpus;
    uint64 m_checks_completed;
    std::vector<MasterPort*> writePorts;
    std::vector<MasterPort*> readPorts;
    uint64 m_checks_to_complete;
    int m_deadlock_threshold;
    int m_num_writers;
    int m_num_readers;
    int m_wakeup_frequency;
    bool m_check_flush;
    int m_num_inst_ports;
};

inline std::ostream&
operator<<(std::ostream& out, const RubyTester& obj)
{
    obj.print(out);
    out << std::flush;
    return out;
}

#endif // __CPU_RUBYTEST_RUBYTESTER_HH__
