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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.
*/
/*
* MemoryControl.hh
*
* Description: See MemoryControl.cc
*
* $Id: $
*
*/
#ifndef MEMORY_CONTROL_H
#define MEMORY_CONTROL_H
#include "mem/ruby/common/Global.hh"
#include "mem/gems_common/Map.hh"
#include "mem/ruby/common/Address.hh"
#include "mem/ruby/profiler/MemCntrlProfiler.hh"
#include "mem/ruby/system/System.hh"
#include "mem/ruby/slicc_interface/Message.hh"
#include "mem/gems_common/util.hh"
#include "mem/ruby/system/MemoryNode.hh"
// Note that "MemoryMsg" is in the "generated" directory:
#include "mem/protocol/MemoryMsg.hh"
#include "mem/ruby/common/Consumer.hh"
#include "mem/ruby/system/AbstractMemOrCache.hh"
#include "sim/sim_object.hh"
#include "params/RubyMemoryControl.hh"
#include <list>
// This constant is part of the definition of tFAW; see
// the comments in header to MemoryControl.cc
#define ACTIVATE_PER_TFAW 4
//////////////////////////////////////////////////////////////////////////////
class Consumer;
class MemoryControl : public SimObject, public Consumer, public AbstractMemOrCache {
public:
// Constructors
typedef RubyMemoryControlParams Params;
MemoryControl(const Params *p);
void init();
// Destructor
~MemoryControl ();
// Public Methods
void wakeup() ;
void setConsumer (Consumer* consumer_ptr);
Consumer* getConsumer () { return m_consumer_ptr; };
void setDescription (const string& name) { m_description = name; };
string getDescription () { return m_description; };
// Called from the directory:
void enqueue (const MsgPtr& message, int latency );
void enqueueMemRef (MemoryNode& memRef);
void dequeue ();
const Message* peek ();
MemoryNode peekNode ();
bool isReady();
bool areNSlotsAvailable (int n) { return true; }; // infinite queue length
//// Called from L3 cache:
//void writeBack(physical_address_t addr);
void printConfig (ostream& out);
void print (ostream& out) const;
void setDebug (int debugFlag);
void clearStats() const;
void printStats(ostream& out) const;
//added by SS
int getBanksPerRank() { return m_banks_per_rank; };
int getRanksPerDimm() { return m_ranks_per_dimm; };
int getDimmsPerChannel() { return m_dimms_per_channel; }
private:
void enqueueToDirectory (MemoryNode req, int latency);
int getBank (physical_address_t addr);
int getRank (int bank);
bool queueReady (int bank);
void issueRequest (int bank);
bool issueRefresh (int bank);
void markTfaw (int rank);
void executeCycle ();
// Private copy constructor and assignment operator
MemoryControl (const MemoryControl& obj);
MemoryControl& operator=(const MemoryControl& obj);
// data members
Consumer* m_consumer_ptr; // Consumer to signal a wakeup()
string m_description;
int m_msg_counter;
int m_awakened;
int m_mem_bus_cycle_multiplier;
int m_banks_per_rank;
int m_ranks_per_dimm;
int m_dimms_per_channel;
int m_bank_bit_0;
int m_rank_bit_0;
int m_dimm_bit_0;
unsigned int m_bank_queue_size;
int m_bank_busy_time;
int m_rank_rank_delay;
int m_read_write_delay;
int m_basic_bus_busy_time;
int m_mem_ctl_latency;
int m_refresh_period;
int m_mem_random_arbitrate;
int m_tFaw;
int m_mem_fixed_delay;
int m_total_banks;
int m_total_ranks;
int m_refresh_period_system;
// queues where memory requests live
list<MemoryNode> m_response_queue;
list<MemoryNode> m_input_queue;
list<MemoryNode>* m_bankQueues;
// Each entry indicates number of address-bus cycles until bank
// is reschedulable:
int* m_bankBusyCounter;
int* m_oldRequest;
uint64* m_tfaw_shift;
int* m_tfaw_count;
// Each of these indicates number of address-bus cycles until
// we can issue a new request of the corresponding type:
int m_busBusyCounter_Write;
int m_busBusyCounter_ReadNewRank;
int m_busBusyCounter_Basic;
int m_busBusy_WhichRank; // which rank last granted
int m_roundRobin; // which bank queue was last granted
int m_refresh_count; // cycles until next refresh
int m_need_refresh; // set whenever m_refresh_count goes to zero
int m_refresh_bank; // which bank to refresh next
int m_ageCounter; // age of old requests; to detect starvation
int m_idleCount; // watchdog timer for shutting down
int m_debug; // turn on printf's
MemCntrlProfiler* m_profiler_ptr;
};
#endif // MEMORY_CONTROL_H
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