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/*
* Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
* Copyright (c) 2012 Advanced Micro Devices, Inc.
* 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.
*/
#ifndef __MEM_RUBY_SYSTEM_MEMORY_CONTROL_HH__
#define __MEM_RUBY_SYSTEM_MEMORY_CONTROL_HH__
#include <iostream>
#include <list>
#include <string>
#include "mem/protocol/MemoryMsg.hh"
#include "mem/ruby/common/Address.hh"
#include "mem/ruby/common/Consumer.hh"
#include "mem/ruby/common/Global.hh"
#include "mem/ruby/profiler/MemCntrlProfiler.hh"
#include "mem/ruby/slicc_interface/Message.hh"
#include "mem/ruby/system/MemoryControl.hh"
#include "mem/ruby/system/MemoryNode.hh"
#include "mem/ruby/system/System.hh"
#include "params/RubyMemoryControl.hh"
#include "sim/sim_object.hh"
// This constant is part of the definition of tFAW; see
// the comments in header to RubyMemoryControl.cc
#define ACTIVATE_PER_TFAW 4
//////////////////////////////////////////////////////////////////////////////
class RubyMemoryControl : public MemoryControl
{
public:
typedef RubyMemoryControlParams Params;
RubyMemoryControl(const Params *p);
void init();
void reset();
~RubyMemoryControl();
unsigned int drain(DrainManager *dm);
void wakeup();
void setConsumer(Consumer* consumer_ptr);
Consumer* getConsumer() { return m_consumer_ptr; };
void setDescription(const std::string& name) { m_description = name; };
std::string getDescription() { return m_description; };
// Called from the directory:
void enqueue(const MsgPtr& message, Cycles latency);
void enqueueMemRef(MemoryNode& memRef);
void dequeue();
const Message* peek();
MemoryNode peekNode();
bool isReady();
bool areNSlotsAvailable(int n) { return true; }; // infinite queue length
void print(std::ostream& out) const;
void regStats();
const int getBank(const physical_address_t addr) const;
const int getRank(const physical_address_t addr) const;
// not used in Ruby memory controller
const int getChannel(const physical_address_t addr) const;
const int getRow(const physical_address_t addr) 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; }
bool functionalReadBuffers(Packet *pkt);
uint32_t functionalWriteBuffers(Packet *pkt);
private:
void enqueueToDirectory(MemoryNode req, Cycles latency);
const int getRank(int bank) const;
bool queueReady(int bank);
void issueRequest(int bank);
bool issueRefresh(int bank);
void markTfaw(int rank);
void executeCycle();
// Private copy constructor and assignment operator
RubyMemoryControl (const RubyMemoryControl& obj);
RubyMemoryControl& operator=(const RubyMemoryControl& obj);
// data members
Consumer* m_consumer_ptr; // Consumer to signal a wakeup()
std::string m_description;
int m_msg_counter;
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;
Cycles m_mem_ctl_latency;
int m_refresh_period;
int m_mem_random_arbitrate;
int m_tFaw;
Cycles m_mem_fixed_delay;
int m_total_banks;
int m_total_ranks;
int m_refresh_period_system;
// queues where memory requests live
std::list<MemoryNode> m_response_queue;
std::list<MemoryNode> m_input_queue;
std::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
MemCntrlProfiler* m_profiler_ptr;
};
std::ostream& operator<<(std::ostream& out, const RubyMemoryControl& obj);
#endif // __MEM_RUBY_SYSTEM_MEMORY_CONTROL_HH__
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