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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.
*/
/*
* PersistentArbiter.h
*
* Description:
*
* Used for hierarchical distributed persistent request scheme
*
*/
#ifndef PERSISTENTARBITER_H
#define PERSISTENTARBITER_H
#include "Global.hh"
#include "Vector.hh"
#include "AbstractChip.hh"
#include "AccessPermission.hh"
#include "AccessType.hh"
#include "RubyConfig.hh"
#include "Address.hh"
#include "interface.hh"
struct ArbiterEntry {
bool valid;
Address address;
AccessType type;
NodeID localId;
};
class PersistentArbiter {
public:
// Constructors
PersistentArbiter(AbstractChip* chip_ptr);
// Destructor
~PersistentArbiter();
// Public Methods
void addLocker(NodeID id, Address addr, AccessType type);
void removeLocker(NodeID id);
bool successorRequestPresent(Address addr, NodeID id);
bool lockersExist();
void advanceActiveLock();
Address getActiveLockAddress();
NodeID getArbiterId();
bool isBusy();
void setIssuedAddress(Address addr);
bool isIssuedAddress(Address addr);
Address getIssuedAddress() { return m_issued_address; }
static void printConfig(ostream& out) {}
void print(ostream& out) const;
NodeID getActiveLocalId();
private:
Address m_issued_address;
AbstractChip* m_chip_ptr;
int m_locker;
bool m_busy;
Vector<ArbiterEntry> m_entries;
};
// Output operator definition
extern inline
ostream& operator<<(ostream& out, const PersistentArbiter& obj)
{
obj.print(out);
out << flush;
return out;
}
#endif //PERFECTCACHEMEMORY_H
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