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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.
*/
/*
* $Id$
*
* Description:
*
*/
#ifndef StoreBuffer_H
#define StoreBuffer_H
#include "Global.hh"
#include "Consumer.hh"
#include "Address.hh"
#include "AccessModeType.hh"
#include "CacheRequestType.hh"
#include "StoreCache.hh"
class CacheMsg;
class DataBlock;
class SubBlock;
class StoreBufferEntry;
class AbstractChip;
template <class TYPE> class Vector;
class StoreBuffer : public Consumer {
public:
// Constructors
StoreBuffer(AbstractChip* chip_ptr, int version);
// Destructor
~StoreBuffer();
// Public Methods
void wakeup(); // Used only for deadlock detection
void callBack(const Address& addr, DataBlock& data);
void insertStore(const CacheMsg& request);
void updateSubBlock(SubBlock& sub_block) const { m_store_cache.update(sub_block); }
bool trySubBlock(const SubBlock& sub_block) const { assert(isReady()); return m_store_cache.check(sub_block); }
void print(ostream& out) const;
bool isEmpty() const { return (m_size == 0); }
bool isReady() const;
// Class methods
static void printConfig(ostream& out);
private:
// Private Methods
void processHeadOfQueue();
StoreBufferEntry& peek();
void dequeue();
void enqueue(const StoreBufferEntry& entry);
StoreBufferEntry& getEntry(int index);
// Private copy constructor and assignment operator
StoreBuffer(const StoreBuffer& obj);
StoreBuffer& operator=(const StoreBuffer& obj);
// Data Members (m_ prefix)
int m_version;
Vector<StoreBufferEntry>* m_queue_ptr;
int m_head;
int m_tail;
int m_size;
StoreCache m_store_cache;
AbstractChip* m_chip_ptr;
bool m_pending;
Address m_pending_address;
bool m_seen_atomic;
bool m_deadlock_check_scheduled;
};
// Output operator declaration
ostream& operator<<(ostream& out, const StoreBuffer& obj);
// ******************* Definitions *******************
// Output operator definition
extern inline
ostream& operator<<(ostream& out, const StoreBuffer& obj)
{
obj.print(out);
out << flush;
return out;
}
#endif //StoreBuffer_H
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