systemc: Rework how delayed sensitivities are handled.

Make BindInfo into a more general purpose Port class which mirrors
sc_module and Module, sc_object and Object, etc. This tracks multiple
bindings internally, and also pending sensitivities. Keep a global
list of ports which are added in reverse order to match Accellera, and
which is iterated over to finalize binding and for phase callbacks.
This is as opposed to doing it one module at a time, and is to better
match Accellera's ordering for the regressions.

Also the sensitivity classes are now built with factory functions,
which gets around problems calling virtual functions from their
constructors or forgetting to having to have extra boilerplate each
place they're constructed.

The port class also now finalizes port or event finder sensitivities
when its binding is completed, unless it's already complete in which
case it does so immediately.

Change-Id: I1b01689715c425b94e0f68cf0271f5c1565d8c61
Reviewed-on: https://gem5-review.googlesource.com/c/12806
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Gabe Black <gabeblack@google.com>

1 files changed, 101 insertions, 0 deletions

diff --git a/src/systemc/core/port.cc b/src/systemc/core/port.cc
new file mode 100644
index 000000000..af6ecd125
--- /dev/null
+++ b/src/systemc/core/port.cc
@@ -0,0 +1,101 @@
+/*
+ * Copyright 2018 Google, Inc.
+ *
+ * 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: Gabe Black
+ */
+
+#include "systemc/core/port.hh"
+
+#include "systemc/core/sensitivity.hh"
+
+namespace sc_gem5
+{
+
+void
+Port::finalizePort(StaticSensitivityPort *port)
+{
+    for (int i = 0; i < size(); i++)
+        port->addEvent(&getInterface(i)->default_event());
+}
+
+void
+Port::finalizeFinder(StaticSensitivityFinder *finder)
+{
+    for (int i = 0; i < size(); i++)
+        finder->addEvent(&finder->find(getInterface(i)));
+}
+
+void
+Port::sensitive(StaticSensitivityPort *port)
+{
+    if (finalized)
+        finalizePort(port);
+    else
+        sensitivities.push_back(new Sensitivity(port));
+}
+
+void
+Port::sensitive(StaticSensitivityFinder *finder)
+{
+    if (finalized)
+        finalizeFinder(finder);
+    else
+        sensitivities.push_back(new Sensitivity(finder));
+}
+
+void
+Port::finalize()
+{
+    if (finalized)
+        return;
+    finalized = true;
+
+    for (auto &b: bindings) {
+        if (b->interface) {
+            addInterface(b->interface);
+        } else {
+            b->port->_gem5Port->finalize();
+            addInterfaces(b->port);
+        }
+        delete b;
+    }
+
+    bindings.clear();
+
+    for (auto &s: sensitivities) {
+        if (s->port)
+            finalizePort(s->port);
+        else
+            finalizeFinder(s->finder);
+        delete s;
+    }
+
+    sensitivities.clear();
+}
+
+std::list<Port *> allPorts;
+
+} // namespace sc_gem5