Move PioPort timing code into Simple Timing Port object

Make PioPort use it
Make Physical memory use it as well

src/SConscript:
    Add timing port to sconscript
src/dev/io_device.cc:
src/dev/io_device.hh:
    Move simple timing pio port stuff into a simple timing port class so it can be used by the physical memory
src/mem/physical.cc:
src/mem/physical.hh:
    use a simple timing port stuff instead of rolling our own here

--HG--
extra : convert_revision : e5befbd295a572568cfdca533efb5ed1984c59d1

1 files changed, 82 insertions, 0 deletions

diff --git a/src/mem/tport.cc b/src/mem/tport.cc
new file mode 100644
index 000000000..90cf68f02
--- /dev/null
+++ b/src/mem/tport.cc
@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2006 The Regents of The University of Michigan
+ * 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: Ali Saidi
+ */
+
+#include "mem/tport.hh"
+
+void
+SimpleTimingPort::recvRetry()
+{
+    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()
+{
+    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);
+}
+
+void
+SimpleTimingPort::resendNacked(Packet *pkt) {
+    pkt->reinitNacked();
+    if (transmitList.size()) {
+         transmitList.push_front(pkt);
+    } else {
+        if (!Port::sendTiming(pkt))
+            transmitList.push_front(pkt);
+    }
+};
+
+
+unsigned int
+SimpleTimingPort::drain(Event *de)
+{
+    if (outTiming == 0 && transmitList.size() == 0)
+        return 0;
+    drainEvent = de;
+    return 1;
+}