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[/] [openrisc/] [trunk/] [orpsocv2/] [bench/] [sysc/] [include/] [TapActionIRScan.h] - Rev 323
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// ---------------------------------------------------------------------------- // TAP IR-Scan action: definition // Copyright (C) 2009 Embecosm Limited <info@embecosm.com> // Contributor Jeremy Bennett <jeremy.bennett@embecosm.com> // This file is part of the Embecosm cycle accurate SystemC JTAG library. // This program is free software: you can redistribute it and/or modify it // under the terms of the GNU Lesser General Public License as published by // the Free Software Foundation, either version 3 of the License, or (at your // option) any later version. // This program is distributed in the hope that it will be useful, but WITHOUT // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or // FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public // License for more details. // You should have received a copy of the GNU Lesser General Public License // along with this program. If not, see <http://www.gnu.org/licenses/>. // The C/C++ parts of this program are commented throughout in a fashion // suitable for processing with Doxygen. // ---------------------------------------------------------------------------- // $Id$ #ifndef TAP_ACTION_IR_SCAN__H #define TAP_ACTION_IR_SCAN__H #include <stdint.h> #include "TapAction.h" #include "TapStateMachine.h" //! Class to represent a TAP IR-Scan action. //! This class assumes that JTAG instruction registers are relatively //! small. IEEE 1149.1 mandates at least 2 bits, although implementations //! often have a wider range of instructions. The OpenRISC 1000 debug unit for //! example uses 5 bits. 32-bits seems more than enough for the largest //! applications. class TapActionIRScan : public TapAction { public: // Constructor TapActionIRScan (sc_core::sc_event *_doneEvent, uint32_t _iRegIn, int _iRegSize); // Get the shifted out value uint32_t getIRegOut (); protected: // Process the action for IR-Scan bool process (TapStateMachine *tapStateMachine, bool &tdi, bool tdo, bool &tms); private: //! The value being shifted in uint32_t iRegIn; //! The number of bits to shift int iRegSize; //! The value shifted out uint32_t iRegOut; //! The number of bits shifted so far int bitsShifted; //! Where we are in the IR-scan process enum { SHIFT_IR_PREPARING, SHIFT_IR_SHIFTING, SHIFT_IR_UPDATING } iRScanState; }; // TapActionIRScan #endif // TAP_ACTION_IR_SCAN__H
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