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/*
* 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.
*/
#include "mem/mem_delay.hh"
#include "params/MemDelay.hh"
#include "params/SimpleMemDelay.hh"
MemDelay::MemDelay(const MemDelayParams *p)
: ClockedObject(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");
}
Port &
MemDelay::getPort(const std::string &if_name, PortID idx)
{
if (if_name == "master") {
return masterPort;
} else if (if_name == "slave") {
return slavePort;
} else {
return ClockedObject::getPort(if_name, idx);
}
}
bool
MemDelay::trySatisfyFunctional(PacketPtr pkt)
{
return slavePort.trySatisfyFunctional(pkt) ||
masterPort.trySatisfyFunctional(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.trySatisfyFunctional(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.trySatisfyFunctional(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);
}