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authorIru Cai <mytbk920423@gmail.com>2020-02-25 16:23:30 +0800
committerIru Cai <mytbk920423@gmail.com>2020-02-25 16:23:30 +0800
commitde954233b87f5167677f8086686703db1c9f1a7e (patch)
tree524740d2ae4e6ce9930e6fa4225da3ed5d72f7c3
parent1595558f39f6724b3f5bd630c68bcb35fe8bf012 (diff)
downloadgem5-de954233b87f5167677f8086686703db1c9f1a7e.tar.xz
learning-gem5: timing readsimple-object-demo
Change-Id: I566aa3e6e14c9d1784eaf93ede88c98a52a1fa71
-rw-r--r--src/learning_gem5/part2/simple_object.cc26
-rw-r--r--src/learning_gem5/part2/simple_object.hh7
2 files changed, 28 insertions, 5 deletions
diff --git a/src/learning_gem5/part2/simple_object.cc b/src/learning_gem5/part2/simple_object.cc
index 76dadf9c8..66f1ca206 100644
--- a/src/learning_gem5/part2/simple_object.cc
+++ b/src/learning_gem5/part2/simple_object.cc
@@ -46,9 +46,18 @@ SimpleObject::SimpleObject(SimpleObjectParams *params) :
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();
+ // readAtomic();
+ readTiming();
}
void SimpleObject::readAtomic()
@@ -66,6 +75,21 @@ void SimpleObject::readAtomic()
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);
diff --git a/src/learning_gem5/part2/simple_object.hh b/src/learning_gem5/part2/simple_object.hh
index 53fa1fea1..e45dce4ae 100644
--- a/src/learning_gem5/part2/simple_object.hh
+++ b/src/learning_gem5/part2/simple_object.hh
@@ -41,10 +41,8 @@ class SimpleObject : public SimObject
{
public:
// these virtual functions must be implemented
- virtual bool recvTimingResp(PacketPtr pkt)
- {
- fatal("SimplePort::recvTimingResp not implemented!\n");
- }
+ virtual bool recvTimingResp(PacketPtr pkt) override;
+
virtual void recvReqRetry()
{
fatal("SimplePort::recvReqRetry not implemented!\n");
@@ -74,6 +72,7 @@ class SimpleObject : public SimObject
virtual void startup() override;
void processEvent();
void readAtomic();
+ void readTiming();
void writeAtomic();
};