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Diffstat (limited to 'ext/systemc/src/sysc/kernel/sc_reset.h')
| -rw-r--r-- | ext/systemc/src/sysc/kernel/sc_reset.h | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/ext/systemc/src/sysc/kernel/sc_reset.h b/ext/systemc/src/sysc/kernel/sc_reset.h new file mode 100644 index 000000000..f0992bb16 --- /dev/null +++ b/ext/systemc/src/sysc/kernel/sc_reset.h @@ -0,0 +1,164 @@ +/***************************************************************************** + + 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_reset.h -- Process reset support. + + Original Author: Andy Goodrich, Forte Design Systems, 17 June 2003 + + CHANGE LOG AT THE END OF THE FILE + *****************************************************************************/ + +#if !defined(sc_reset_h_INCLUDED) +#define sc_reset_h_INCLUDED + +#include "sysc/communication/sc_writer_policy.h" + +namespace sc_core { + +// FORWARD CLASS REFERENCES: + +template<typename DATA> class sc_signal_in_if; +template<typename IF, sc_writer_policy POL> class sc_signal; +template<typename DATA> class sc_in; +template<typename DATA> class sc_inout; +template<typename DATA> class sc_out; +template<typename SOURCE> class sc_spawn_reset; +class sc_reset; +class sc_process_b; + +//============================================================================== +// CLASS sc_reset_target - RESET ENTRY FOR AN sc_process_b TARGET +// +// This class describes a reset condition associated with an sc_process_b +// instance. +//============================================================================== +class sc_reset_target { + public: + bool m_async; // true asynchronous reset, false synchronous. + bool m_level; // level for reset. + sc_process_b* m_process_p; // process this reset entry is for. +}; + +inline std::ostream& operator << ( std::ostream& os, + const sc_reset_target& target ) +{ + os << "["; + os << target.m_async << ","; + os << target.m_level << ","; + os << target.m_process_p << ","; + return os; +} + +//============================================================================== +// CLASS sc_reset - RESET INFORMATION FOR A RESET SIGNAL +// +// See the top of sc_reset.cpp for an explaination of how the reset mechanism +// is implemented. +//============================================================================== +class sc_reset { + friend class sc_cthread_process; + friend class sc_method_process; + friend class sc_module; + friend class sc_process_b; + friend class sc_signal<bool, SC_ONE_WRITER>; + friend class sc_signal<bool, SC_MANY_WRITERS>; + friend class sc_signal<bool, SC_UNCHECKED_WRITERS>; + friend class sc_simcontext; + template<typename SOURCE> friend class sc_spawn_reset; + friend class sc_thread_process; + + protected: + static void reconcile_resets(); + static void + reset_signal_is(bool async, const sc_signal_in_if<bool>& iface, + bool level); + static void + reset_signal_is( bool async, const sc_in<bool>& iface, bool level); + static void + reset_signal_is( bool async, const sc_inout<bool>& iface, bool level); + static void + reset_signal_is( bool async, const sc_out<bool>& iface, bool level); + + protected: + sc_reset( const sc_signal_in_if<bool>* iface_p ) : + m_iface_p(iface_p), m_targets() {} + void notify_processes(); + void remove_process( sc_process_b* ); + + protected: + const sc_signal_in_if<bool>* m_iface_p; // Interface to read. + std::vector<sc_reset_target> m_targets; // List of processes to reset. + + private: // disabled + sc_reset( const sc_reset& ); + const sc_reset& operator = ( const sc_reset& ); +}; + +// $Log: sc_reset.h,v $ +// Revision 1.11 2011/08/26 20:46:10 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 1.10 2011/08/24 22:05:51 acg +// Torsten Maehne: initialization changes to remove warnings. +// +// Revision 1.9 2011/04/08 22:38:30 acg +// Andy Goodrich: added comment pointing to the description of how the +// reset mechanism works that is in sc_reset.cpp. +// +// Revision 1.8 2011/02/18 20:27:14 acg +// Andy Goodrich: Updated Copyrights. +// +// Revision 1.7 2011/02/13 21:47:37 acg +// Andy Goodrich: update copyright notice. +// +// Revision 1.6 2011/01/06 18:00:32 acg +// Andy Goodrich: Removed commented out code. +// +// Revision 1.5 2010/12/07 20:09:14 acg +// Andy Goodrich: removed sc_signal signatures since already have sc_signal_in_if signatures. +// +// Revision 1.4 2010/11/20 17:10:57 acg +// Andy Goodrich: reset processing changes for new IEEE 1666 standard. +// +// Revision 1.3 2009/05/22 16:06:29 acg +// Andy Goodrich: process control updates. +// +// Revision 1.2 2008/05/22 17:06:26 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 1.6 2006/12/02 20:58:19 acg +// Andy Goodrich: updates from 2.2 for IEEE 1666 support. +// +// Revision 1.4 2006/04/11 23:13:21 acg +// Andy Goodrich: Changes for reduced reset support that only includes +// sc_cthread, but has preliminary hooks for expanding to method and thread +// processes also. +// +// Revision 1.3 2006/01/13 18:44:30 acg +// Added $Log to record CVS changes into the source. + +} // namespace sc_core + +#endif // !defined(sc_reset_h_INCLUDED) |