mem-cache: Add setters to validate and secure block

[gem5.git] / src / mem / tport.cc

diff --git a/src/mem/tport.cc b/src/mem/tport.cc
index 90cf68f02a0d142e4c0fd33a1821689258350486..9f0f08814b92ed4961985743a2d56117cbfd5d06 100644 (file)
--- a/src/mem/tport.cc
+++ b/src/mem/tport.cc
@@ -1,4 +1,16 @@
 /*
+ * Copyright (c) 2012 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.
+ *
  * Copyright (c) 2006 The Regents of The University of Michigan
  * All rights reserved.
  *
@@ -26,57 +38,50 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  * Authors: Ali Saidi
+ *          Andreas Hansson
  */
 
 #include "mem/tport.hh"
 
-void
-SimpleTimingPort::recvRetry()
+#include "mem/mem_object.hh"
+
+SimpleTimingPort::SimpleTimingPort(const std::string& _name,
+                                   MemObject* _owner) :
+    QueuedSlavePort(_name, _owner, queueImpl), queueImpl(*_owner, *this)
 {
-    bool result = true;
-    while (result && transmitList.size()) {
-        result = Port::sendTiming(transmitList.front());
-        if (result)
-            transmitList.pop_front();
-    }
-   if (transmitList.size() == 0 && drainEvent) {
-       drainEvent->process();
-       drainEvent = NULL;
-   }
 }
 
 void
-SimpleTimingPort::SendEvent::process()
+SimpleTimingPort::recvFunctional(PacketPtr pkt)
 {
-    port->outTiming--;
-    assert(port->outTiming >= 0);
-    if (port->Port::sendTiming(packet))
-       if (port->transmitList.size() == 0 && port->drainEvent) {
-           port->drainEvent->process();
-           port->drainEvent = NULL;
-       }
-       return;
-
-    port->transmitList.push_back(packet);
+    if (!respQueue.trySatisfyFunctional(pkt)) {
+        // do an atomic access and throw away the returned latency
+        recvAtomic(pkt);
+    }
 }
 
-void
-SimpleTimingPort::resendNacked(Packet *pkt) {
-    pkt->reinitNacked();
-    if (transmitList.size()) {
-         transmitList.push_front(pkt);
+bool
+SimpleTimingPort::recvTimingReq(PacketPtr pkt)
+{
+    // the SimpleTimingPort should not be used anywhere where there is
+    // a need to deal with snoop responses and their flow control
+    // requirements
+    if (pkt->cacheResponding())
+        panic("SimpleTimingPort should never see packets with the "
+              "cacheResponding flag set\n");
+
+    bool needsResponse = pkt->needsResponse();
+    Tick latency = recvAtomic(pkt);
+    // turn packet around to go back to requester if response expected
+    if (needsResponse) {
+        // recvAtomic() should already have turned packet into
+        // atomic response
+        assert(pkt->isResponse());
+        schedTimingResp(pkt, curTick() + latency);
     } else {
-        if (!Port::sendTiming(pkt))
-            transmitList.push_front(pkt);
+        // queue the packet for deletion
+        pendingDelete.reset(pkt);
     }
-};
-
 
-unsigned int
-SimpleTimingPort::drain(Event *de)
-{
-    if (outTiming == 0 && transmitList.size() == 0)
-        return 0;
-    drainEvent = de;
-    return 1;
+    return true;
 }