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, 224 insertions, 0 deletions

diff --git a/ext/systemc/src/sysc/kernel/sc_cor_fiber.cpp b/ext/systemc/src/sysc/kernel/sc_cor_fiber.cpp
new file mode 100644
index 000000000..77cec8227
--- /dev/null
+++ b/ext/systemc/src/sysc/kernel/sc_cor_fiber.cpp
@@ -0,0 +1,224 @@
+/*****************************************************************************
+
+  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_cor_fiber.cpp -- Coroutine implementation with fibers.
+
+  Original Author: Martin Janssen, Synopsys, Inc., 2001-12-18
+
+ CHANGE LOG APPEARS AT THE END OF THE FILE
+ *****************************************************************************/
+
+#if defined(_WIN32) || defined(WIN32) || defined(WIN64)
+
+#ifndef SC_INCLUDE_WINDOWS_H
+#  define SC_INCLUDE_WINDOWS_H // include Windows.h, if needed
+#endif
+
+#include "sysc/kernel/sc_cor_fiber.h"
+#include "sysc/kernel/sc_simcontext.h"
+#if defined(__GNUC__) && __USING_SJLJ_EXCEPTIONS__
+#   if (__GNUC__ > 3) || ((__GNUC__ == 3) && (__GNUC_MINOR__ > 2))
+#      include <unwind.h>
+#   else
+       extern "C" void _Unwind_SjLj_Register (struct SjLj_Function_Context *);
+       extern "C" void _Unwind_SjLj_Unregister (struct SjLj_Function_Context *);
+#   endif
+#endif
+
+namespace sc_core {
+
+// ----------------------------------------------------------------------------
+//  File static variables.
+// ----------------------------------------------------------------------------
+
+// main coroutine
+
+static sc_cor_fiber main_cor;
+#if defined(__GNUC__) && __USING_SJLJ_EXCEPTIONS__
+// current coroutine
+static sc_cor_fiber* curr_cor;
+#endif
+
+
+// ----------------------------------------------------------------------------
+//  CLASS : sc_cor_fiber
+//
+//  Coroutine class implemented with Windows fibers.
+// ----------------------------------------------------------------------------
+
+// destructor
+
+sc_cor_fiber::~sc_cor_fiber()
+{
+    if( m_fiber != 0 ) {
+      PVOID cur_fiber = GetCurrentFiber();
+      if (m_fiber != cur_fiber)
+         DeleteFiber( m_fiber );
+    }
+}
+
+
+// ----------------------------------------------------------------------------
+//  CLASS : sc_cor_pkg_fiber
+//
+//  Coroutine package class implemented with QuickThreads.
+// ----------------------------------------------------------------------------
+
+int sc_cor_pkg_fiber::instance_count = 0;
+
+
+// constructor
+
+sc_cor_pkg_fiber::sc_cor_pkg_fiber( sc_simcontext* simc )
+: sc_cor_pkg( simc )
+{
+    if( ++ instance_count == 1 ) {
+        // initialize the main coroutine
+        assert( main_cor.m_fiber == 0 );
+        main_cor.m_fiber = ConvertThreadToFiber( 0 );
+
+        if( !main_cor.m_fiber && GetLastError() == ERROR_ALREADY_FIBER ) {
+            // conversion of current thread to fiber has failed, because
+            // someone else already converted the main thread to a fiber
+            // -> store current fiber
+            main_cor.m_fiber = GetCurrentFiber();
+        }
+        assert( main_cor.m_fiber != 0 );
+
+#       if defined(__GNUC__) && __USING_SJLJ_EXCEPTIONS__
+            // initialize the current coroutine
+            assert( curr_cor == 0 );
+            curr_cor = &main_cor;
+#       endif
+    }
+}
+
+
+// destructor
+
+sc_cor_pkg_fiber::~sc_cor_pkg_fiber()
+{
+    if( -- instance_count == 0 ) {
+	// cleanup the main coroutine
+	main_cor.m_fiber = 0;
+#       if defined(__GNUC__) && __USING_SJLJ_EXCEPTIONS__
+            // cleanup the current coroutine
+            curr_cor = 0;
+#       endif
+    }
+}
+
+
+// create a new coroutine
+
+sc_cor*
+sc_cor_pkg_fiber::create( std::size_t stack_size, sc_cor_fn* fn, void* arg )
+{
+    sc_cor_fiber* cor = new sc_cor_fiber;
+    cor->m_pkg = this;
+    cor->m_stack_size = stack_size;
+    cor->m_fiber = CreateFiberEx( cor->m_stack_size / 2, cor->m_stack_size, 0,
+			        (LPFIBER_START_ROUTINE) fn, arg );
+    return cor;
+}
+
+
+// yield to the next coroutine
+
+void
+sc_cor_pkg_fiber::yield( sc_cor* next_cor )
+{
+    sc_cor_fiber* new_cor = SCAST<sc_cor_fiber*>( next_cor );
+#   if defined(__GNUC__) && __USING_SJLJ_EXCEPTIONS__
+        // Switch SJLJ exception handling function contexts
+        _Unwind_SjLj_Register(&curr_cor->m_eh);
+        _Unwind_SjLj_Unregister(&new_cor->m_eh);
+        curr_cor = new_cor;
+#   endif
+    SwitchToFiber( new_cor->m_fiber );
+}
+
+
+// abort the current coroutine (and resume the next coroutine)
+
+void
+sc_cor_pkg_fiber::abort( sc_cor* next_cor )
+{
+    sc_cor_fiber* new_cor = SCAST<sc_cor_fiber*>( next_cor );
+#   if defined(__GNUC__) && __USING_SJLJ_EXCEPTIONS__
+        // Switch SJLJ exception handling function contexts
+        _Unwind_SjLj_Register(&curr_cor->m_eh);
+        _Unwind_SjLj_Unregister(&new_cor->m_eh);
+        curr_cor = new_cor;
+#   endif
+    SwitchToFiber( new_cor->m_fiber );
+}
+
+
+// get the main coroutine
+
+sc_cor*
+sc_cor_pkg_fiber::get_main()
+{
+    return &main_cor;
+}
+
+} // namespace sc_core
+
+
+// $Log: sc_cor_fiber.cpp,v $
+// Revision 1.9  2011/09/08 16:12:45  acg
+//  Philipp A. Hartmann: make sure we don't try to make a thread a fiber if
+//  its already a fiber.
+//
+// Revision 1.8  2011/08/26 20:46:09  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  2011/06/25 17:08:39  acg
+//  Andy Goodrich: Jerome Cornet's changes to use libtool to build the
+//  library.
+//
+// Revision 1.6  2011/02/18 20:27:14  acg
+//  Andy Goodrich: Updated Copyrights.
+//
+// Revision 1.5  2011/02/13 21:47:37  acg
+//  Andy Goodrich: update copyright notice.
+//
+// Revision 1.4  2011/01/19 23:21:50  acg
+//  Andy Goodrich: changes for IEEE 1666 2011
+//
+// Revision 1.3  2009/05/22 16:06:29  acg
+//  Andy Goodrich: process control updates.
+//
+// Revision 1.2  2008/05/22 17:06:25  acg
+//  Andy Goodrich: updated copyright notice to include 2008.
+//
+// Revision 1.1.1.1  2006/12/15 20:20:05  acg
+// SystemC 2.3
+//
+// Revision 1.3  2006/01/13 18:44:29  acg
+// Added $Log to record CVS changes into the source.
+//
+
+#endif
+
+// Taf!