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/*
* 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 __MEM_RUBY_STRUCTURES_PERSISTENTTABLE_HH__
#define __MEM_RUBY_STRUCTURES_PERSISTENTTABLE_HH__
#include <iostream>
#include <unordered_map>
#include "mem/protocol/AccessType.hh"
#include "mem/ruby/common/Address.hh"
#include "mem/ruby/common/MachineID.hh"
#include "mem/ruby/common/NetDest.hh"
class PersistentTableEntry
{
public:
PersistentTableEntry() {}
void print(std::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(Addr address, MachineID locker,
AccessType type);
void persistentRequestUnlock(Addr address, MachineID unlocker);
bool okToIssueStarving(Addr address, MachineID machID) const;
MachineID findSmallest(Addr address) const;
AccessType typeOfSmallest(Addr address) const;
void markEntries(Addr address);
bool isLocked(Addr addr) const;
int countStarvingForAddress(Addr addr) const;
int countReadStarvingForAddress(Addr addr) const;
void print(std::ostream& out) const;
private:
// Private copy constructor and assignment operator
PersistentTable(const PersistentTable& obj);
PersistentTable& operator=(const PersistentTable& obj);
// Data Members (m_prefix)
typedef std::unordered_map<Addr, PersistentTableEntry> AddressMap;
AddressMap m_map;
};
inline std::ostream&
operator<<(std::ostream& out, const PersistentTable& obj)
{
obj.print(out);
out << std::flush;
return out;
}
inline std::ostream&
operator<<(std::ostream& out, const PersistentTableEntry& obj)
{
obj.print(out);
out << std::flush;
return out;
}
#endif // __MEM_RUBY_STRUCTURES_PERSISTENTTABLE_HH__
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