learning-gem5: timing readsimple-object-demo

Change-Id: I566aa3e6e14c9d1784eaf93ede88c98a52a1fa71

1 files changed, 25 insertions, 1 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);