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>

1 files changed, 305 insertions, 0 deletions

diff --git a/ext/systemc/src/sysc/communication/sc_export.cpp b/ext/systemc/src/sysc/communication/sc_export.cpp
new file mode 100644
index 000000000..2da7a1533
--- /dev/null
+++ b/ext/systemc/src/sysc/communication/sc_export.cpp
@@ -0,0 +1,305 @@
+/*****************************************************************************
+
+  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_export.cpp -- 
+
+  Original Author: Bishnupriya Bhattachary, Cadence, Design Systems, 
+                   25 August, 2003
+
+  CHANGE LOG IS AT THE END OF THE FILE
+ *****************************************************************************/
+
+#include "sysc/communication/sc_export.h"
+#include "sysc/kernel/sc_simcontext.h"
+#include "sysc/kernel/sc_module.h"
+#include "sysc/kernel/sc_object_int.h"
+
+namespace sc_core {
+
+// ----------------------------------------------------------------------------
+//  CLASS : sc_export_base
+//
+// ----------------------------------------------------------------------------
+
+sc_export_base::sc_export_base() : sc_object(sc_gen_unique_name("export"))
+{
+    simcontext()->get_export_registry()->insert(this);
+}
+    
+sc_export_base::sc_export_base(const char* name_) : sc_object(name_)
+{
+    simcontext()->get_export_registry()->insert(this);
+}
+    
+sc_export_base::~sc_export_base()
+{
+    simcontext()->get_export_registry()->remove(this);
+}
+
+// called by construction_done() (does nothing by default)
+
+void
+sc_export_base::before_end_of_elaboration()
+{
+}
+
+// called when construction is done
+
+void
+sc_export_base::construction_done()
+{
+    if ( get_interface() == 0 )
+    {
+      report_error( SC_ID_SC_EXPORT_NOT_BOUND_AFTER_CONSTRUCTION_, 0);
+    }
+
+    sc_module* parent = static_cast<sc_module*>( get_parent_object() );
+    sc_object::hierarchy_scope scope( parent );
+    before_end_of_elaboration();
+}
+
+// called by elaboration_done() (does nothing by default)
+
+void
+sc_export_base::end_of_elaboration()
+{}
+
+// called when elaboration is done
+
+void
+sc_export_base::elaboration_done()
+{
+    sc_module* parent = static_cast<sc_module*>( get_parent_object() );
+    sc_object::hierarchy_scope scope( parent );
+    end_of_elaboration();
+}
+
+// called by start_simulation (does nothing)
+
+void
+sc_export_base::start_of_simulation()
+{}
+
+// called before simulation starts
+
+void
+sc_export_base::start_simulation()
+{
+    sc_module* parent = static_cast<sc_module*>( get_parent_object() );
+    sc_object::hierarchy_scope scope( parent );
+    start_of_simulation();
+}
+
+// called by simulation_done (does nothing)
+
+void
+sc_export_base::end_of_simulation()
+{}
+
+// called after simulation ends
+
+void
+sc_export_base::simulation_done()
+{
+    sc_module* parent = static_cast<sc_module*>( get_parent_object() );
+    sc_object::hierarchy_scope scope( parent );
+    end_of_simulation();
+}
+
+void
+sc_export_base::report_error( const char* id, const char* add_msg ) const
+{
+    char msg[BUFSIZ];
+    if( add_msg != 0 ) {
+        std::sprintf( msg, "%s: export '%s' (%s)", add_msg, name(), kind() );
+    } else {
+        std::sprintf( msg, "export '%s' (%s)", name(), kind() );
+    }
+    SC_REPORT_ERROR( id, msg );
+}
+
+
+// ----------------------------------------------------------------------------
+//  CLASS : sc_export_registry
+//
+//  Registry for all exports.
+//  FOR INTERNAL USE ONLY!
+// ----------------------------------------------------------------------------
+
+void
+sc_export_registry::insert( sc_export_base* export_ )
+{
+    if( sc_is_running() ) {
+	export_->report_error(SC_ID_INSERT_EXPORT_, "simulation running");
+    }
+
+    if( m_simc->elaboration_done()  ) {
+       export_->report_error(SC_ID_INSERT_EXPORT_, "elaboration done");
+    }
+
+
+#ifdef DEBUG_SYSTEMC
+    // check if port_ is already inserted
+    for( int i = size() - 1; i >= 0; -- i ) {
+	if( export_ == m_export_vec[i] ) {
+	    export_->report_error( SC_ID_INSERT_EXPORT_, 
+	                           "export already inserted ");
+	}
+    }
+#endif
+
+/* 
+    //TBD:  maybe we want to do this stuf for later
+
+    // append the port to the current module's vector of ports
+    sc_module* curr_module = m_simc->hierarchy_curr();
+    if( curr_module == 0 ) {
+	port_->report_error( SC_ID_PORT_OUTSIDE_MODULE_ );
+    }
+    curr_module->append_port( port_ );
+*/
+
+    // insert
+    m_export_vec.push_back( export_ );
+}
+
+void
+sc_export_registry::remove( sc_export_base* export_ )
+{
+    if (size()==0) return;
+    int i;
+    for( i = size() - 1; i >= 0; -- i ) {
+	if( export_ == m_export_vec[i] ) {
+	    break;
+	}
+    }
+    if( i == -1 ) {
+	export_->report_error( SC_ID_SC_EXPORT_NOT_REGISTERED_ );
+    }
+
+    // remove
+    m_export_vec[i] = m_export_vec[size() - 1];
+    m_export_vec.resize(size()-1);
+}
+
+// constructor
+
+sc_export_registry::sc_export_registry( sc_simcontext& simc_ )
+: m_construction_done(0),
+  m_export_vec(),
+  m_simc( &simc_ )
+{
+}
+
+
+// destructor
+
+sc_export_registry::~sc_export_registry()
+{
+}
+
+// called when construction is done
+
+bool
+sc_export_registry::construction_done()
+{
+    if( m_construction_done == size() )
+      // nothing has been updated
+      return true;
+
+    for( int i = size()-1; i >= m_construction_done; --i ) {
+	m_export_vec[i]->construction_done();
+    }
+
+    m_construction_done = size();
+    return false;
+}
+
+// called when elaboration is done
+
+void
+sc_export_registry::elaboration_done()
+{
+    for( int i = size() - 1; i >= 0; -- i ) {
+	m_export_vec[i]->elaboration_done();
+    }
+}
+
+// called before simulation begins
+
+void
+sc_export_registry::start_simulation()
+{
+    for( int i = size() - 1; i >= 0; -- i ) {
+	m_export_vec[i]->start_simulation();
+    }
+}
+
+void
+sc_export_registry::simulation_done()
+{
+    for( int i = size() - 1; i >= 0; -- i ) {
+	m_export_vec[i]->simulation_done();
+    }
+}
+
+} // namespace sc_core
+
+// $Log: sc_export.cpp,v $
+// Revision 1.8  2011/08/26 20:45:40  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 1.7  2011/08/24 22:05:36  acg
+//  Torsten Maehne: initialization changes to remove warnings.
+//
+// Revision 1.6  2011/05/09 04:07:37  acg
+//  Philipp A. Hartmann:
+//    (1) Restore hierarchy in all phase callbacks.
+//    (2) Ensure calls to before_end_of_elaboration.
+//
+// Revision 1.5  2011/02/18 20:31:05  acg
+//  Philipp A. Hartmann: added error messages for calls that cannot be done
+//  after elaboration.
+//
+// Revision 1.4  2011/02/18 20:23:45  acg
+//  Andy Goodrich: Copyright update.
+//
+// Revision 1.3  2011/02/18 20:07:04  acg
+//  Philipp A. Hartmann: Patch to revert to sprintf from snprintf to keep
+//  some versions of MSVC happy.
+//
+// Revision 1.2  2011/02/14 17:50:16  acg
+//  Andy Goodrich: testing for sc_port and sc_export instantiations during
+//  end of elaboration and issuing appropriate error messages.
+//
+// Revision 1.1.1.1  2006/12/15 20:20:04  acg
+// SystemC 2.3
+//
+// Revision 1.4  2006/01/26 21:00:50  acg
+//  Andy Goodrich: conversion to use sc_event::notify(SC_ZERO_TIME) instead of
+//  sc_event::notify_delayed()
+//
+// Revision 1.3  2006/01/13 18:47:42  acg
+// Added $Log command so that CVS comments are reproduced in the source.
+//
+
+// Taf!