ext: Include SystemC 2.3.1 into gem5

In the past it happened several times that some changes in gem5 broke the
SystemC coupling. Recently Accelera has changed the licence for SystemC
from their own licence to Apache2.0, which is compatible with gem5.
However, SystemC usually relies on the Boost library, but I was able to
exchange the boost calls by c++11 alternatives. The recent SystemC version
is placed into /ext and is integrated into gem5's build system. The goal is
to integrate some SystemC tests for the CI in some following patches.

Change-Id: I4b66ec806b5e3cffc1d7c85d3735ff4fa5b31fd0
Reviewed-on: https://gem5-review.googlesource.com/2240
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>

ext/systemc/src/sysc/utils/sc_vector.cpp

@@ -0,0 +1,178 @@
+/*****************************************************************************
+
+  Licensed to Accellera Systems Initiative Inc. (Accellera) under one or
+  more contributor license agreements.  See the NOTICE file distributed
+  with this work for additional information regarding copyright ownership.
+  Accellera licenses this file to you under the Apache License, Version 2.0
+  (the "License"); you may not use this file except in compliance with the
+  License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+  implied.  See the License for the specific language governing
+  permissions and limitations under the License.
+
+ *****************************************************************************/
+
+/*****************************************************************************
+
+  sc_vector.cpp - A vector of named (SystemC) objects (modules, ports, channels)
+
+  Original Author: Philipp A. Hartmann, OFFIS
+
+  CHANGE LOG AT END OF FILE
+ *****************************************************************************/
+
+
+#include "sc_vector.h"
+
+#include "sysc/utils/sc_hash.h"
+#include "sysc/utils/sc_list.h"
+#include "sysc/utils/sc_utils_ids.h"
+
+#include "sysc/kernel/sc_simcontext.h"
+#include "sysc/kernel/sc_object_manager.h"
+
+#include <sstream>
+
+namespace sc_core {
+
+sc_vector_base::sc_vector_base()
+  : sc_object( sc_gen_unique_name("vector") )
+  , vec_()
+  , objs_vec_()
+{}
+
+std::vector< sc_object* > const &
+sc_vector_base::get_elements() const
+{
+  if( !objs_vec_ )
+    objs_vec_ = new std::vector< sc_object* >;
+
+  if( objs_vec_->size() || !size() )
+    return *objs_vec_;
+
+  objs_vec_->reserve( size() );
+  for( const_iterator it=begin(); it != end(); ++it )
+    if( sc_object* obj = object_cast(*it) )
+      objs_vec_->push_back( obj );
+
+  return *objs_vec_;
+}
+
+sc_object*
+sc_vector_base::implicit_cast( ... ) const
+{
+  SC_REPORT_ERROR( SC_ID_VECTOR_NONOBJECT_ELEMENTS_, name() );
+  return NULL;
+}
+
+void
+sc_vector_base::check_index( size_type i ) const
+{
+  if( i>=size() )
+  {
+    std::stringstream str;
+    str << name()
+        << "[" << i << "] >= size() = " << size();
+    SC_REPORT_ERROR( SC_ID_OUT_OF_BOUNDS_, str.str().c_str() );
+  }
+}
+
+bool
+sc_vector_base::check_init( size_type n ) const
+{
+  if ( !n )
+    return false;
+
+  if( size() ) // already filled
+  {
+    std::stringstream str;
+    str << name()
+        << ", size=" << size()
+        << ", requested size=" << n;
+    SC_REPORT_ERROR( SC_ID_VECTOR_INIT_CALLED_TWICE_
+                   , str.str().c_str() );
+    return false;
+  }
+
+  sc_simcontext* simc = simcontext();
+  sc_assert( simc == sc_get_curr_simcontext() );
+
+  sc_object* parent_p = simc->active_object();
+  if( parent_p != get_parent_object() )
+  {
+    std::stringstream str;
+    str << name() << ": expected "
+        << ( get_parent_object()
+              ? get_parent_object()->name() : "<top-level>" )
+        << ", got "
+        << ( parent_p ? parent_p->name() : "<top-level>" );
+
+    SC_REPORT_ERROR( SC_ID_VECTOR_INIT_INVALID_CONTEXT_
+                   , str.str().c_str() );
+    return false;
+  }
+
+  return true;
+}
+
+void
+sc_vector_base::report_empty_bind( const char* kind_, bool dst_empty_ ) const
+{
+  std::stringstream str;
+
+  str << "target `" << name() << "' "
+      << "(" << kind_ << ") ";
+
+  if( !size() ) {
+    str << "not initialised yet";
+  } else if ( dst_empty_ ) {
+    str << "empty range given";
+  } else {
+    str << "empty destination range given";
+  }
+
+  SC_REPORT_WARNING( SC_ID_VECTOR_BIND_EMPTY_, str.str().c_str() );
+}
+
+std::string
+sc_vector_base::make_name( const char* prefix, size_type /* idx */ )
+{
+  // TODO: How to handle name clashes due to interleaved vector
+  //       creation and init()?
+  //       sc_vector< foo > v1, v2;
+  //       v1.name() == "vector", v2.name() == "vector_0"
+  //       v1.init( 1 ); -> v1[0].name() == "vector_0" -> clash
+  return sc_gen_unique_name( prefix );
+}
+
+} // namespace sc_core
+
+// $Log: sc_vector.cpp,v $
+// Revision 1.6  2011/08/26 20:46:20  acg
+//  Andy Goodrich: moved the modification log to the end of the file to
+//  eliminate source line number skew when check-ins are done.
+//
+// Revision 1.5  2011/04/01 22:35:19  acg
+//  Andy Goodrich: spelling fix.
+//
+// Revision 1.4  2011/03/28 13:03:09  acg
+//  Andy Goodrich: Philipp's latest update.
+//
+// Revision 1.3  2011/03/23 16:16:28  acg
+//  Philipp A. Hartmann: rebase implementation on void*
+//      - supports virtual inheritance from sc_object again
+//      - build up get_elements result on demand
+//      - still requires element type to be derived from sc_object
+//
+// Revision 1.2  2011/02/14 17:54:25  acg
+//  Andy Goodrich: Philipp's addition of early bind checks.
+//
+// Revision 1.1  2011/02/13 21:54:14  acg
+//  Andy Goodrich: turn on embedding of cvs log records.
+
+// Taf!