Check.hh

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/*
 * 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,
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 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 */
 
#ifndef __CPU_RUBYTEST_CHECK_HH__
#define __CPU_RUBYTEST_CHECK_HH__
 
#include <iostream>
 
#include "base/random.hh"
#include "cpu/testers/rubytest/RubyTester.hh"
#include "mem/ruby/common/Address.hh"
#include "mem/ruby/protocol/RubyAccessMode.hh"
#include "mem/ruby/protocol/TesterStatus.hh"
 
namespace gem5
{
 
namespace ruby
{
class SubBlock;
} // namespace ruby
 
const int CHECK_SIZE_BITS = 2;
const int CHECK_SIZE = (1 << CHECK_SIZE_BITS);
const int CACHE_LINE_BITS = 6;
 
class Check
{
  public:
    Check(Addr address, Addr pc, int _num_writers,
          int _num_readers, RubyTester* _tester);
 
    void initiate(Cycles current_time); // Does Action or Check or nether
    void performCallback(ruby::NodeID proc, ruby::SubBlock* data,
        Cycles curTime);
    Addr getAddress() const { return m_address; }
    void changeAddress(Addr address);
 
    void print(std::ostream& out) const;
 
  private:
    void initiateFlush(Cycles current_time);
    void initiatePrefetch(Cycles current_time);
    void initiateAction(Cycles current_time);
    void initiateCheck(Cycles current_time);
 
    void pickValue();
    void pickInitiatingNode();
 
    void debugPrint();
 
    ruby::TesterStatus m_status;
    uint8_t m_value;
    int m_store_count;
    ruby::NodeID m_initiatingNode;
    Addr m_address;
    Addr m_pc;
    ruby::RubyAccessMode m_access_mode;
    int m_num_writers;
    int m_num_readers;
    RubyTester* m_tester_ptr;
    Random::RandomPtr rng = Random::genRandom();
};
 
inline std::ostream&
operator<<(std::ostream& out, const Check& obj)
{
    obj.print(out);
    out << std::flush;
    return out;
}
 
} // namespace gem5
 
#endif // __CPU_RUBYTEST_CHECK_HH__