diff options
Diffstat (limited to 'src/mem')
| -rw-r--r-- | src/mem/MemDelay.py | 57 | ||||
| -rw-r--r-- | src/mem/SConscript | 2 | ||||
| -rw-r--r-- | src/mem/mem_delay.cc | 216 | ||||
| -rw-r--r-- | src/mem/mem_delay.hh | 185 |
4 files changed, 460 insertions, 0 deletions
diff --git a/src/mem/MemDelay.py b/src/mem/MemDelay.py new file mode 100644 index 000000000..b48866815 --- /dev/null +++ b/src/mem/MemDelay.py @@ -0,0 +1,57 @@ +# Copyright (c) 2018 ARM Limited +# All rights reserved. +# +# The license below extends only to copyright in the software and shall +# not be construed as granting a license to any other intellectual +# property including but not limited to intellectual property relating +# to a hardware implementation of the functionality of the software +# licensed hereunder. You may use the software subject to the license +# terms below provided that you ensure that this notice is replicated +# unmodified and in its entirety in all distributions of the software, +# modified or unmodified, in source code or in binary form. +# +# 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. +# +# Authors: Andreas Sandberg + +from m5.params import * +from MemObject import MemObject + +class MemDelay(MemObject): + type = 'MemDelay' + cxx_header = 'mem/mem_delay.hh' + abstract = True + + master = MasterPort("Master port") + slave = SlavePort("Slave port") + +class SimpleMemDelay(MemDelay): + type = 'SimpleMemDelay' + cxx_header = 'mem/mem_delay.hh' + + read_req = Param.Latency("0t", "Read request delay") + read_resp = Param.Latency("0t", "Read response delay") + + write_req = Param.Latency("0t", "Write request delay") + write_resp = Param.Latency("0t", "Write response delay") diff --git a/src/mem/SConscript b/src/mem/SConscript index 625eb0608..7c0d426d7 100644 --- a/src/mem/SConscript +++ b/src/mem/SConscript @@ -44,6 +44,7 @@ SimObject('SimpleMemory.py') SimObject('XBar.py') SimObject('HMCController.py') SimObject('SerialLink.py') +SimObject('MemDelay.py') Source('abstract_mem.cc') Source('addr_mapper.cc') @@ -68,6 +69,7 @@ Source('tport.cc') Source('xbar.cc') Source('hmc_controller.cc') Source('serial_link.cc') +Source('mem_delay.cc') if env['TARGET_ISA'] != 'null': Source('fs_translating_port_proxy.cc') diff --git a/src/mem/mem_delay.cc b/src/mem/mem_delay.cc new file mode 100644 index 000000000..4a682f3bc --- /dev/null +++ b/src/mem/mem_delay.cc @@ -0,0 +1,216 @@ +/* + * Copyright (c) 2018 ARM Limited + * All rights reserved + * + * The license below extends only to copyright in the software and shall + * not be construed as granting a license to any other intellectual + * property including but not limited to intellectual property relating + * to a hardware implementation of the functionality of the software + * licensed hereunder. You may use the software subject to the license + * terms below provided that you ensure that this notice is replicated + * unmodified and in its entirety in all distributions of the software, + * modified or unmodified, in source code or in binary form. + * + * 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. + * + * Authors: Andreas Sandberg + */ + +#include "mem/mem_delay.hh" + +#include "params/MemDelay.hh" +#include "params/SimpleMemDelay.hh" + +MemDelay::MemDelay(const MemDelayParams *p) + : MemObject(p), + masterPort(name() + "-master", *this), + slavePort(name() + "-slave", *this), + reqQueue(*this, masterPort), + respQueue(*this, slavePort), + snoopRespQueue(*this, masterPort) +{ +} + +void +MemDelay::init() +{ + if (!slavePort.isConnected() || !masterPort.isConnected()) + fatal("Memory delay is not connected on both sides.\n"); +} + + +BaseMasterPort& +MemDelay::getMasterPort(const std::string& if_name, PortID idx) +{ + if (if_name == "master") { + return masterPort; + } else { + return MemObject::getMasterPort(if_name, idx); + } +} + +BaseSlavePort& +MemDelay::getSlavePort(const std::string& if_name, PortID idx) +{ + if (if_name == "slave") { + return slavePort; + } else { + return MemObject::getSlavePort(if_name, idx); + } +} + +bool +MemDelay::checkFunctional(PacketPtr pkt) +{ + return slavePort.checkFunctional(pkt) || + masterPort.checkFunctional(pkt); +} + +MemDelay::MasterPort::MasterPort(const std::string &_name, MemDelay &_parent) + : QueuedMasterPort(_name, &_parent, + _parent.reqQueue, _parent.snoopRespQueue), + parent(_parent) +{ +} + +bool +MemDelay::MasterPort::recvTimingResp(PacketPtr pkt) +{ + const Tick when = curTick() + parent.delayResp(pkt); + + parent.slavePort.schedTimingResp(pkt, when); + + return true; +} + +void +MemDelay::MasterPort::recvFunctionalSnoop(PacketPtr pkt) +{ + if (parent.checkFunctional(pkt)) { + pkt->makeResponse(); + } else { + parent.slavePort.sendFunctionalSnoop(pkt); + } +} + +Tick +MemDelay::MasterPort::recvAtomicSnoop(PacketPtr pkt) +{ + const Tick delay = parent.delaySnoopResp(pkt); + + return delay + parent.slavePort.sendAtomicSnoop(pkt); +} + +void +MemDelay::MasterPort::recvTimingSnoopReq(PacketPtr pkt) +{ + parent.slavePort.sendTimingSnoopReq(pkt); +} + + +MemDelay::SlavePort::SlavePort(const std::string &_name, MemDelay &_parent) + : QueuedSlavePort(_name, &_parent, _parent.respQueue), + parent(_parent) +{ +} + +Tick +MemDelay::SlavePort::recvAtomic(PacketPtr pkt) +{ + const Tick delay = parent.delayReq(pkt) + parent.delayResp(pkt); + + return delay + parent.masterPort.sendAtomic(pkt); +} + +bool +MemDelay::SlavePort::recvTimingReq(PacketPtr pkt) +{ + const Tick when = curTick() + parent.delayReq(pkt); + + parent.masterPort.schedTimingReq(pkt, when); + + return true; +} + +void +MemDelay::SlavePort::recvFunctional(PacketPtr pkt) +{ + if (parent.checkFunctional(pkt)) { + pkt->makeResponse(); + } else { + parent.masterPort.sendFunctional(pkt); + } +} + +bool +MemDelay::SlavePort::recvTimingSnoopResp(PacketPtr pkt) +{ + const Tick when = curTick() + parent.delaySnoopResp(pkt); + + parent.masterPort.schedTimingSnoopResp(pkt, when); + + return true; +} + + + +SimpleMemDelay::SimpleMemDelay(const SimpleMemDelayParams *p) + : MemDelay(p), + readReqDelay(p->read_req), + readRespDelay(p->read_resp), + writeReqDelay(p->write_req), + writeRespDelay(p->write_resp) +{ +} + +Tick +SimpleMemDelay::delayReq(PacketPtr pkt) +{ + if (pkt->isRead()) { + return readReqDelay; + } else if (pkt->isWrite()) { + return writeReqDelay; + } else { + return 0; + } +} + +Tick +SimpleMemDelay::delayResp(PacketPtr pkt) +{ + if (pkt->isRead()) { + return readRespDelay; + } else if (pkt->isWrite()) { + return writeRespDelay; + } else { + return 0; + } +} + + +SimpleMemDelay * +SimpleMemDelayParams::create() +{ + return new SimpleMemDelay(this); +} diff --git a/src/mem/mem_delay.hh b/src/mem/mem_delay.hh new file mode 100644 index 000000000..28c04052b --- /dev/null +++ b/src/mem/mem_delay.hh @@ -0,0 +1,185 @@ +/* + * Copyright (c) 2018 ARM Limited + * All rights reserved + * + * The license below extends only to copyright in the software and shall + * not be construed as granting a license to any other intellectual + * property including but not limited to intellectual property relating + * to a hardware implementation of the functionality of the software + * licensed hereunder. You may use the software subject to the license + * terms below provided that you ensure that this notice is replicated + * unmodified and in its entirety in all distributions of the software, + * modified or unmodified, in source code or in binary form. + * + * 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. + * + * Authors: Andreas Sandberg + */ + +#ifndef __MEM_MEM_DELAY_HH__ +#define __MEM_MEM_DELAY_HH__ + +#include "mem/mem_object.hh" +#include "mem/qport.hh" + +struct MemDelayParams; +struct SimpleMemDelayParams; + +/** + * This abstract component provides a mechanism to delay + * packets. It can be spliced between arbitrary ports of the memory + * system and delays packets that pass through it. + * + * Specialisations of this abstract class should override at least one + * of delayReq, delayResp, deleySnoopReq, delaySnoopResp. These + * methods receive a PacketPtr as their argument and return a delay in + * Ticks. The base class implements an infinite buffer to hold delayed + * packets until they are ready. The intention is to use this + * component for rapid prototyping of other memory system components + * that introduce a packet processing delays. + * + * NOTE: Packets may be reordered if the delays aren't constant. + */ +class MemDelay : public MemObject +{ + + public: + MemDelay(const MemDelayParams *params); + + void init() override; + + protected: // Port interfaces + BaseMasterPort& getMasterPort(const std::string &if_name, + PortID idx = InvalidPortID) override; + + BaseSlavePort& getSlavePort(const std::string &if_name, + PortID idx = InvalidPortID) override; + + class MasterPort : public QueuedMasterPort + { + public: + MasterPort(const std::string &_name, MemDelay &_parent); + + protected: + bool recvTimingResp(PacketPtr pkt) override; + + void recvFunctionalSnoop(PacketPtr pkt) override; + + Tick recvAtomicSnoop(PacketPtr pkt) override; + + void recvTimingSnoopReq(PacketPtr pkt) override; + + void recvRangeChange() override { + parent.slavePort.sendRangeChange(); + } + + bool isSnooping() const override { + return parent.slavePort.isSnooping(); + } + + private: + MemDelay& parent; + }; + + class SlavePort : public QueuedSlavePort + { + public: + SlavePort(const std::string &_name, MemDelay &_parent); + + protected: + Tick recvAtomic(PacketPtr pkt) override; + bool recvTimingReq(PacketPtr pkt) override; + void recvFunctional(PacketPtr pkt) override; + bool recvTimingSnoopResp(PacketPtr pkt) override; + + AddrRangeList getAddrRanges() const override { + return parent.masterPort.getAddrRanges(); + } + + bool tryTiming(PacketPtr pkt) override { return true; } + + private: + + MemDelay& parent; + + }; + + bool checkFunctional(PacketPtr pkt); + + MasterPort masterPort; + SlavePort slavePort; + + ReqPacketQueue reqQueue; + RespPacketQueue respQueue; + SnoopRespPacketQueue snoopRespQueue; + + protected: + /** + * Delay a request by some number of ticks. + * + * @return Ticks to delay packet. + */ + virtual Tick delayReq(PacketPtr pkt) { return 0; } + + /** + * Delay a response by some number of ticks. + * + * @return Ticks to delay packet. + */ + virtual Tick delayResp(PacketPtr pkt) { return 0; } + + /** + * Delay a snoop response by some number of ticks. + * + * @return Ticks to delay packet. + */ + virtual Tick delaySnoopResp(PacketPtr pkt) { return 0; } +}; + +/** + * Delay packets by a constant time. Delays can be specified + * separately for read requests, read responses, write requests, and + * write responses. + * + * This class does not delay snoops or requests/responses that are + * neither reads or writes. + */ +class SimpleMemDelay : public MemDelay +{ + public: + SimpleMemDelay(const SimpleMemDelayParams *params); + + protected: + Tick delayReq(PacketPtr pkt) override; + Tick delayResp(PacketPtr pkt) override; + + protected: // Params + const Tick readReqDelay; + const Tick readRespDelay; + + const Tick writeReqDelay; + const Tick writeRespDelay; +}; + +#endif //__MEM_MEM_DELAY_HH__ |