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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: Sequencer.hh 1.70 2006/09/27 14:56:41-05:00 bobba@s1-01.cs.wisc.edu $
*
* Description:
*
*/
#ifndef SEQUENCER_H
#define SEQUENCER_H
#include "mem/ruby/common/Global.hh"
#include "mem/ruby/common/Consumer.hh"
#include "mem/protocol/CacheRequestType.hh"
#include "mem/protocol/AccessModeType.hh"
#include "mem/protocol/GenericMachineType.hh"
#include "mem/protocol/PrefetchBit.hh"
#include "mem/ruby/system/RubyPort.hh"
#include "mem/gems_common/Map.hh"
#include "mem/ruby/common/Address.hh"
class DataBlock;
class CacheMsg;
class MachineID;
class CacheMemory;
class RubySequencerParams;
struct SequencerRequest {
RubyRequest ruby_request;
Time issue_time;
SequencerRequest(const RubyRequest & _ruby_request,
Time _issue_time)
: ruby_request(_ruby_request),
issue_time(_issue_time)
{}
};
std::ostream& operator<<(std::ostream& out, const SequencerRequest& obj);
class Sequencer : public RubyPort, public Consumer {
public:
typedef RubySequencerParams Params;
// Constructors
Sequencer(const Params *);
// Destructor
~Sequencer();
// Public Methods
void wakeup(); // Used only for deadlock detection
void printConfig(ostream& out) const;
void printProgress(ostream& out) const;
void writeCallback(const Address& address, DataBlock& data);
void readCallback(const Address& address, DataBlock& data);
RequestStatus makeRequest(const RubyRequest & request);
RequestStatus getRequestStatus(const RubyRequest& request);
bool empty() const;
void print(ostream& out) const;
void printStats(ostream & out) const;
void checkCoherence(const Address& address);
// bool getRubyMemoryValue(const Address& addr, char* value, unsigned int size_in_bytes);
// bool setRubyMemoryValue(const Address& addr, char *value, unsigned int size_in_bytes);
void removeRequest(SequencerRequest* request);
private:
// Private Methods
bool tryCacheAccess(const Address& addr, CacheRequestType type, const Address& pc, AccessModeType access_mode, int size, DataBlock*& data_ptr);
void issueRequest(const RubyRequest& request);
void hitCallback(SequencerRequest* request, DataBlock& data);
bool insertRequest(SequencerRequest* request);
// Private copy constructor and assignment operator
Sequencer(const Sequencer& obj);
Sequencer& operator=(const Sequencer& obj);
private:
int m_max_outstanding_requests;
int m_deadlock_threshold;
CacheMemory* m_dataCache_ptr;
CacheMemory* m_instCache_ptr;
Map<Address, SequencerRequest*> m_writeRequestTable;
Map<Address, SequencerRequest*> m_readRequestTable;
// Global outstanding request count, across all request tables
int m_outstanding_count;
bool m_deadlock_check_scheduled;
int m_store_waiting_on_load_cycles;
int m_store_waiting_on_store_cycles;
int m_load_waiting_on_store_cycles;
int m_load_waiting_on_load_cycles;
bool m_usingRubyTester;
class SequencerWakeupEvent : public Event
{
Sequencer *m_sequencer_ptr;
public:
SequencerWakeupEvent(Sequencer *_seq) : m_sequencer_ptr(_seq) {}
void process() { m_sequencer_ptr->wakeup(); }
const char *description() const { return "Sequencer deadlock check"; }
};
SequencerWakeupEvent deadlockCheckEvent;
};
// Output operator declaration
ostream& operator<<(ostream& out, const Sequencer& obj);
// ******************* Definitions *******************
// Output operator definition
extern inline
ostream& operator<<(ostream& out, const Sequencer& obj)
{
obj.print(out);
out << flush;
return out;
}
#endif //SEQUENCER_H
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