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diff --git a/ext/systemc/src/tlm_core/tlm_2/tlm_quantum/tlm_global_quantum.h b/ext/systemc/src/tlm_core/tlm_2/tlm_quantum/tlm_global_quantum.h
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+++ b/ext/systemc/src/tlm_core/tlm_2/tlm_quantum/tlm_global_quantum.h
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+/*****************************************************************************
+
+  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.
+
+ *****************************************************************************/
+
+#ifndef __TLM_GLOBAL_QUANTUM_H__
+#define __TLM_GLOBAL_QUANTUM_H__
+
+#include <systemc>
+
+namespace tlm {
+
+//
+// tlm_global_quantum class
+//
+// The global quantum is the maximum time an initiator can run ahead of
+// systemC time. All initiators should synchronize on timingpoints that
+// are multiples of the global quantum value.
+//
+// sc_set_time_resolution can only be called before the first
+// sc_time object is created. This means that after setting the
+// global quantum it will not be possible to call sc_set_time_resolution.
+// If sc_set_time_resolution must be called this must be done before
+// the global quantum is set.
+//
+
+class tlm_global_quantum
+{
+public:
+  //
+  // Returns a reference to the tlm_global_quantum singleton
+  //
+  static tlm_global_quantum& instance()
+  {
+    static tlm_global_quantum instance_;
+    return instance_;
+  }
+
+public:
+
+  //
+  // Setter/getter for the global quantum
+  //
+  void set(const sc_core::sc_time& t)
+  {
+    m_global_quantum = t;
+  }
+
+  const sc_core::sc_time& get() const
+  {
+    return m_global_quantum;
+  }
+
+  //
+  // This function will calculate the maximum value for the next local
+  // quantum for an initiator. All initiators should synchronize on
+  // integer multiples of the global quantum value. The value for the
+  // local quantum of an initiator can be smaller, but should never be
+  // greater than the value returned by this method.
+  //
+  sc_core::sc_time compute_local_quantum()
+  {
+    if (m_global_quantum != sc_core::SC_ZERO_TIME) {
+      const sc_core::sc_time current = sc_core::sc_time_stamp();
+      const sc_core::sc_time g_quant = m_global_quantum;
+      return g_quant - (current % g_quant);
+    } else {
+      return sc_core::SC_ZERO_TIME;
+    }
+  }
+
+protected:
+  tlm_global_quantum() : m_global_quantum(sc_core::SC_ZERO_TIME)
+  {
+  }
+
+protected:
+  sc_core::sc_time m_global_quantum;
+};
+
+} // namespace tlm
+
+#endif