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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.
*/
/*
* The actual modelled switch. It use the perfect switch and a
* Throttle object to control and bandwidth and timing *only for the
* output port*. So here we have un-realistic modelling, since the
* order of PerfectSwitch and Throttle objects get woke up affect the
* message timing. A more accurate model would be having two set of
* system states, one for this cycle, one for next cycle. And on the
* cycle boundary swap the two set of states.
*/
#ifndef __MEM_RUBY_NETWORK_SIMPLE_SWITCH_HH__
#define __MEM_RUBY_NETWORK_SIMPLE_SWITCH_HH__
#include <iostream>
#include <vector>
#include "mem/packet.hh"
#include "mem/protocol/MessageSizeType.hh"
#include "mem/ruby/common/TypeDefines.hh"
#include "mem/ruby/network/BasicRouter.hh"
#include "params/Switch.hh"
class MessageBuffer;
class PerfectSwitch;
class NetDest;
class SimpleNetwork;
class Throttle;
class Switch : public BasicRouter
{
public:
typedef SwitchParams Params;
Switch(const Params *p);
~Switch();
void init();
void addInPort(const std::vector<MessageBuffer*>& in);
void addOutPort(const std::vector<MessageBuffer*>& out,
const NetDest& routing_table_entry, Cycles link_latency,
int bw_multiplier);
const Throttle* getThrottle(LinkID link_number) const;
void resetStats();
void collateStats();
void regStats();
const Stats::Formula & getMsgCount(unsigned int type) const
{ return m_msg_counts[type]; }
void print(std::ostream& out) const;
void init_net_ptr(SimpleNetwork* net_ptr) { m_network_ptr = net_ptr; }
bool functionalRead(Packet *);
uint32_t functionalWrite(Packet *);
private:
// Private copy constructor and assignment operator
Switch(const Switch& obj);
Switch& operator=(const Switch& obj);
PerfectSwitch* m_perfect_switch;
SimpleNetwork* m_network_ptr;
std::vector<Throttle*> m_throttles;
std::vector<MessageBuffer*> m_buffers_to_free;
// Statistical variables
Stats::Formula m_avg_utilization;
Stats::Formula m_msg_counts[MessageSizeType_NUM];
Stats::Formula m_msg_bytes[MessageSizeType_NUM];
};
inline std::ostream&
operator<<(std::ostream& out, const Switch& obj)
{
obj.print(out);
out << std::flush;
return out;
}
#endif // __MEM_RUBY_NETWORK_SIMPLE_SWITCH_HH__
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