xref: /gem5/src/mem/ruby/structures/PersistentTable.hh

/*
 * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
 * 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 PersistentTable_H
#define PersistentTable_H

#include "mem/ruby/common/Global.hh"
#include "mem/gems_common/Map.hh"
#include "mem/ruby/common/Address.hh"
#include "mem/ruby/system/MachineID.hh"
#include "mem/protocol/AccessType.hh"
#include "mem/ruby/common/NetDest.hh"

class PersistentTableEntry {
public:
  void print(ostream& out) const {}

  NetDest m_starving;
  NetDest m_marked;
  NetDest m_request_to_write;
};

class PersistentTable {
public:
  // Constructors
  PersistentTable();

  // Destructor
  ~PersistentTable();

  // Public Methods
  void persistentRequestLock(const Address& address, MachineID locker, AccessType type);
  void persistentRequestUnlock(const Address& address, MachineID unlocker);
  bool okToIssueStarving(const Address& address, MachineID machID) const;
  MachineID findSmallest(const Address& address) const;
  AccessType typeOfSmallest(const Address& address) const;
  void markEntries(const Address& address);
  bool isLocked(const Address& addr) const;
  int countStarvingForAddress(const Address& addr) const;
  int countReadStarvingForAddress(const Address& addr) const;

  static void printConfig(ostream& out) {}

  void print(ostream& out) const;
private:
  // Private Methods

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

  // Data Members (m_prefix)
  Map<Address, PersistentTableEntry>* m_map_ptr;
};

// ******************* Definitions *******************

// Output operator definition
extern inline
ostream& operator<<(ostream& out, const PersistentTable& obj)
{
  obj.print(out);
  out << flush;
  return out;
}

// Output operator definition
extern inline
ostream& operator<<(ostream& out, const PersistentTableEntry& obj)
{
  obj.print(out);
  out << flush;
  return out;
}

#endif //PersistentTable_H