// ----------------------------------------------------------------------------
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// ----------------------------------------------------------------------------
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// TAP DR-Scan action: definition
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// TAP DR-Scan action: definition
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// Copyright (C) 2009 Embecosm Limited <info@embecosm.com>
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// Copyright (C) 2009 Embecosm Limited <info@embecosm.com>
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// Contributor Jeremy Bennett <jeremy.bennett@embecosm.com>
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// Contributor Jeremy Bennett <jeremy.bennett@embecosm.com>
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// This file is part of the Embecosm cycle accurate SystemC JTAG library.
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// This file is part of the Embecosm cycle accurate SystemC JTAG library.
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// This program is free software: you can redistribute it and/or modify it
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// This program is free software: you can redistribute it and/or modify it
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// under the terms of the GNU Lesser General Public License as published by
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// under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or (at your
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// the Free Software Foundation, either version 3 of the License, or (at your
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// option) any later version.
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// option) any later version.
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// This program is distributed in the hope that it will be useful, but WITHOUT
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// This program is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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// License for more details.
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// License for more details.
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// You should have received a copy of the GNU Lesser General Public License
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// You should have received a copy of the GNU Lesser General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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// The C/C++ parts of this program are commented throughout in a fashion
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// The C/C++ parts of this program are commented throughout in a fashion
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// suitable for processing with Doxygen.
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// suitable for processing with Doxygen.
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// ----------------------------------------------------------------------------
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// ----------------------------------------------------------------------------
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// $Id$
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// $Id$
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#ifndef TAP_ACTION_DR_SCAN__H
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#ifndef TAP_ACTION_DR_SCAN__H
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#define TAP_ACTION_DR_SCAN__H
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#define TAP_ACTION_DR_SCAN__H
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#include <stdint.h>
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#include <stdint.h>
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#include "TapAction.h"
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#include "TapAction.h"
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#include "TapStateMachine.h"
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#include "TapStateMachine.h"
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//! Class to represent a TAP DR-Scan action.
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//! Class to represent a TAP DR-Scan action.
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//! JTAG data registers can be huge and are represented generically as arrays
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//! JTAG data registers can be huge and are represented generically as arrays
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//! of uint64_t. However for efficiency versions of methods are provided based
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//! of uint64_t. However for efficiency versions of methods are provided based
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//! on a single uint64_t.
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//! on a single uint64_t.
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//! The SystemC classes for large unsigned ints are fabulously inefficient in
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//! The SystemC classes for large unsigned ints are fabulously inefficient in
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//! the reference implementation, so are not used here.
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//! the reference implementation, so are not used here.
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class TapActionDRScan
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class TapActionDRScan:public TapAction {
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: public TapAction
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{
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public:
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public:
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// Constructors and destructor
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// Constructors and destructor
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TapActionDRScan (sc_core::sc_event *_doneEvent,
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TapActionDRScan (sc_core::sc_event *_doneEvent,
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uint64_t _dRegInArray[],
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uint64_t _dRegInArray[], int _dRegSize);
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int _dRegSize);
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TapActionDRScan (sc_core::sc_event *_doneEvent,
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TapActionDRScan (sc_core::sc_event *_doneEvent,
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uint64_t _dRegIn,
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uint64_t _dRegIn, int _dRegSize);
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int _dRegSize);
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TapActionDRScan (sc_core::sc_event *_doneEvent,
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TapActionDRScan (sc_core::sc_event *_doneEvent,
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uint64_t _dRegInArray[],
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uint64_t _dRegInArray[],
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int _dRegSize,
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int _dRegSize,
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int _goToPauseState,
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int _goToPauseState, int _bitsBeforePauseState);
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int _bitsBeforePauseState);
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TapActionDRScan (sc_core::sc_event *_doneEvent,
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TapActionDRScan (sc_core::sc_event *_doneEvent,
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uint64_t _dRegIn,
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uint64_t _dRegIn,
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int _dRegSize,
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int _dRegSize,
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int _goToPauseState,
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int _goToPauseState, int _bitsBeforePauseState);
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int _bitsBeforePauseState);
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~TapActionDRScan ();
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~TapActionDRScan ();
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// Get the shifted out value
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// Get the shifted out value
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void getDRegOut (uint64_t dRegArray[]);
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void getDRegOut(uint64_t dRegArray[]);
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uint64_t getDRegOut ();
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uint64_t getDRegOut();
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protected:
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protected:
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// Process the action for IR-Scan
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// Process the action for IR-Scan
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bool process (TapStateMachine *tapStateMachine,
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bool process (TapStateMachine *tapStateMachine,
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bool &tdi,
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bool & tdi, bool tdo, bool & tms);
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bool tdo,
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bool &tms);
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private:
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private:
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//! Number of bits in the data register
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//! Number of bits in the data register
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int dRegBitSize;
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int dRegBitSize;
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//! Number of uint64_t words in the data register
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//! Number of uint64_t words in the data register
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int dRegWordSize;
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int dRegWordSize;
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//! Mask for top word in multi-word register
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//! Mask for top word in multi-word register
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uint64_t topMask;
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uint64_t topMask;
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//! The value being shifted in
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//! The value being shifted in
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uint64_t *dRegInArray;
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uint64_t *dRegInArray;
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//! The value being shifted in (small version optimization)
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//! The value being shifted in (small version optimization)
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uint64_t dRegIn;
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uint64_t dRegIn;
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//! The value shifted out
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//! The value shifted out
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uint64_t *dRegOutArray;
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uint64_t *dRegOutArray;
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//! The value being shifted out (small version optimization)
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//! The value being shifted out (small version optimization)
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uint64_t dRegOut;
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uint64_t dRegOut;
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//! Should we go to PAUSE state and poll tdo during operation?
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//! Should we go to PAUSE state and poll tdo during operation?
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int goToPauseState;
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int goToPauseState;
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//! Number of bits to shift before going to PAUSE state and polling tdo
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//! Number of bits to shift before going to PAUSE state and polling tdo
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int bitsBeforePause;
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int bitsBeforePause;
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int pauseStateCount;
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int pauseStateCount;
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//! Bits shifted so far
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//! Bits shifted so far
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int bitsShifted;
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int bitsShifted;
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//! Where we are in the Shift-DR process
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//! Where we are in the Shift-DR process
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enum {
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enum {
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SHIFT_DR_PREPARING,
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SHIFT_DR_PREPARING,
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SHIFT_DR_SHIFTING,
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SHIFT_DR_SHIFTING,
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SHIFT_DR_SHIFTING_BEFORE_PAUSE,
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SHIFT_DR_SHIFTING_BEFORE_PAUSE,
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SHIFT_DR_SHIFTING_PAUSE,
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SHIFT_DR_SHIFTING_PAUSE,
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SHIFT_DR_EXIT2,
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SHIFT_DR_EXIT2,
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SHIFT_DR_SHIFTING_AFTER_PAUSE,
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SHIFT_DR_SHIFTING_AFTER_PAUSE,
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SHIFT_DR_UPDATING
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SHIFT_DR_UPDATING
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} dRScanState;
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} dRScanState;
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// Utilities to shift the bottom bit out and top bit in
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// Utilities to shift the bottom bit out and top bit in
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bool shiftDRegOut ();
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bool shiftDRegOut();
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void shiftDRegIn (bool bitIn);
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void shiftDRegIn(bool bitIn);
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}; // TapActionDRScan
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}; // TapActionDRScan
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#endif // TAP_ACTION_DR_SCAN__H
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#endif // TAP_ACTION_DR_SCAN__H
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