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[/] [openrisc/] [trunk/] [orpsocv2/] [bench/] [sysc/] [include/] [TapActionDRScan.h] - Rev 363
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// ---------------------------------------------------------------------------- // TAP DR-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_DR_SCAN__H #define TAP_ACTION_DR_SCAN__H #include <stdint.h> #include "TapAction.h" #include "TapStateMachine.h" //! Class to represent a TAP DR-Scan action. //! JTAG data registers can be huge and are represented generically as arrays //! of uint64_t. However for efficiency versions of methods are provided based //! on a single uint64_t. //! The SystemC classes for large unsigned ints are fabulously inefficient in //! the reference implementation, so are not used here. class TapActionDRScan : public TapAction { public: // Constructors and destructor TapActionDRScan (sc_core::sc_event *_doneEvent, uint64_t _dRegInArray[], int _dRegSize); TapActionDRScan (sc_core::sc_event *_doneEvent, uint64_t _dRegIn, int _dRegSize); TapActionDRScan (sc_core::sc_event *_doneEvent, uint64_t _dRegInArray[], int _dRegSize, int _goToPauseState, int _bitsBeforePauseState); TapActionDRScan (sc_core::sc_event *_doneEvent, uint64_t _dRegIn, int _dRegSize, int _goToPauseState, int _bitsBeforePauseState); ~TapActionDRScan (); // Get the shifted out value void getDRegOut (uint64_t dRegArray[]); uint64_t getDRegOut (); protected: // Process the action for IR-Scan bool process (TapStateMachine *tapStateMachine, bool &tdi, bool tdo, bool &tms); private: //! Number of bits in the data register int dRegBitSize; //! Number of uint64_t words in the data register int dRegWordSize; //! Mask for top word in multi-word register uint64_t topMask; //! The value being shifted in uint64_t *dRegInArray; //! The value being shifted in (small version optimization) uint64_t dRegIn; //! The value shifted out uint64_t *dRegOutArray; //! The value being shifted out (small version optimization) uint64_t dRegOut; //! Should we go to PAUSE state and poll tdo during operation? int goToPauseState; //! Number of bits to shift before going to PAUSE state and polling tdo int bitsBeforePause; int pauseStateCount; //! Bits shifted so far int bitsShifted; //! Where we are in the Shift-DR process enum { SHIFT_DR_PREPARING, SHIFT_DR_SHIFTING, SHIFT_DR_SHIFTING_BEFORE_PAUSE, SHIFT_DR_SHIFTING_PAUSE, SHIFT_DR_EXIT2, SHIFT_DR_SHIFTING_AFTER_PAUSE, SHIFT_DR_UPDATING } dRScanState; // Utilities to shift the bottom bit out and top bit in bool shiftDRegOut (); void shiftDRegIn (bool bitIn); }; // TapActionDRScan #endif // TAP_ACTION_DR_SCAN__H
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