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/*
* Copyright (c) 2016 Jason Lowe-Power
* 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.
*
* Authors: Jason Lowe-Power
*/
#include "learning_gem5/part2/simple_object.hh"
#include <iostream>
#include "mem/packet.hh"
#include "mem/request.hh"
#include "sim/system.hh"
SimpleObject::SimpleObject(SimpleObjectParams *params) :
SimObject(params),
masterId(params->system->getMasterId(this)),
memPort(params->name + ".mem_side", this),
isread(params->isread),
event([this] { processEvent(); }, name() + ".event")
{
std::cout << "Hello World! From a SimObject!" << std::endl;
}
bool SimpleObject::SimplePort::recvTimingResp(PacketPtr pkt)
{
std::cout << "Receive packet, val = 0x" <<
std::hex << pkt->getLE<uint32_t>() <<
". Tick = " << std::dec << curTick() << std::endl;
return true;
}
void SimpleObject::processEvent()
{
// readAtomic();
readTiming();
}
void SimpleObject::readAtomic()
{
uint32_t val = 0;
RequestPtr req = std::make_shared<Request>(0x200000, 4, 0, masterId);
PacketPtr pkt = Packet::createRead(req);
pkt->dataStatic(&val);
// pkt->setData((const uint8_t *)&x);
Tick t = memPort.sendAtomic(pkt);
std::cout << "sendAtomic read " << t << " ticks." << std::endl;
std::cout << "read value 0x" << std::hex << val << std::endl;
}
void SimpleObject::readTiming()
{
RequestPtr req = std::make_shared<Request>(0x200000, 4, 0, masterId);
PacketPtr pkt = Packet::createRead(req);
// we cannot use a local stack variable in timing request
pkt->dataDynamic(new uint32_t);
bool res = memPort.sendTimingReq(pkt);
if (res) {
std::cout << "Successfully send timing request. Tick = " <<
curTick() << std::endl;
}
}
void SimpleObject::writeAtomic()
{
RequestPtr req = std::make_shared<Request>(0x200000, 4, 0, masterId);
PacketPtr pkt = Packet::createWrite(req);
uint32_t x = 0xdeadbeef;
pkt->dataStatic(&x);
// pkt->setData((const uint8_t *)&x);
Tick t = memPort.sendAtomic(pkt);
std::cout << "sendAtomic write " << t << " ticks." << std::endl;
}
void SimpleObject::startup()
{
if (!isread) {
writeAtomic();
} else {
schedule(event, 40000);
}
}
SimpleObject*
SimpleObjectParams::create()
{
return new SimpleObject(this);
}
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