systemc: Add a stub version of the sc_interface class.

Change-Id: Iad1da472e13b0e16ad4de03f456ca0a001e69b51
Reviewed-on: https://gem5-review.googlesource.com/10825
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Gabe Black <gabeblack@google.com>

src/systemc/SConscript

@@ -32,6 +32,7 @@ if env['USE_SYSTEMC']:
 
     Source('kernel.cc')
 
+    Source('sc_interface.cc')
     Source('sc_main.cc')
     Source('sc_module_name.cc')
     Source('sc_object.cc')

src/systemc/sc_interface.cc

@@ -0,0 +1,60 @@
+/*
+ * 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/sc_interface.hh"
+
+#include "base/logging.hh"
+
+namespace sc_core
+{
+
+void
+sc_interface::register_port(sc_port_base &, const char *)
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+}
+
+const sc_event &
+sc_interface::default_event() const
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+    return *(sc_event *)nullptr;
+}
+
+sc_interface::~sc_interface()
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+}
+
+sc_interface::sc_interface()
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+}
+
+} // namespace sc_core

src/systemc/sc_interface.hh

@@ -0,0 +1,57 @@
+/*
+ * 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
+ */
+
+#ifndef __SYSTEMC_SC_INTERFACE_HH__
+#define __SYSTEMC_SC_INTERFACE_HH__
+
+namespace sc_core
+{
+
+class sc_port_base;
+class sc_event;
+
+class sc_interface
+{
+  public:
+    virtual void register_port(sc_port_base &, const char *);
+    virtual const sc_event &default_event() const;
+    virtual ~sc_interface();
+
+  protected:
+    sc_interface();
+
+  private:
+    // Disabled
+    sc_interface(const sc_interface &) {}
+    sc_interface &operator = (const sc_interface &) { return *this; }
+};
+
+} // namespace sc_core
+
+#endif  //__SYSTEMC_SC_INTERFACE_HH__