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#include "TapAction.h"
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#include "TapAction.h"
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class sc_event;
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class sc_event;
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//! Constructor
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//! Constructor
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//! Records the SystemC event used to notify completion and sets the
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//! Records the SystemC event used to notify completion and sets the
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//! resetCounter to zero.
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//! resetCounter to zero.
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//! @param _actionType The action type
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//! @param _actionType The action type
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TapAction::TapAction (sc_core::sc_event *_doneEvent) :
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TapAction::TapAction (sc_core::sc_event *_doneEvent) :
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doneEvent (_doneEvent),
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doneEvent(_doneEvent), resetCounter(0)
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resetCounter (0)
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{
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{
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} // TapAction ()
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} // TapAction ()
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//! Accessor to get the SystemC completion event
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//! Accessor to get the SystemC completion event
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//! @return The SystemC completion event
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//! @return The SystemC completion event
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sc_core::sc_event *
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sc_core::sc_event * TapAction::getDoneEvent()
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TapAction::getDoneEvent ()
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{
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{
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return doneEvent;
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return doneEvent;
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} // getDoneEvent ()
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} // getDoneEvent ()
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//! Function to check the TAP is in a consistent state, optionally with a
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//! Function to check the TAP is in a consistent state, optionally with a
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//! warning.
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//! warning.
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//! This is a convenience for subclasses (hence protected), so they can ensure
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//! This is a convenience for subclasses (hence protected), so they can ensure
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//! the state machine is in a consistent state.
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//! the state machine is in a consistent state.
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//! @param[in] warn True to indicate a warning message should be
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//! @param[in] warn True to indicate a warning message should be
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//! issued when starting a reset cycle.
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//! issued when starting a reset cycle.
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//! @return TRUE if the TAP state machine was already in a consistent state.
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//! @return TRUE if the TAP state machine was already in a consistent state.
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bool
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bool TapAction::checkResetDone(TapStateMachine * tapStateMachine,
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TapAction::checkResetDone (TapStateMachine *tapStateMachine,
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bool & tms, bool warn)
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bool &tms,
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bool warn)
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{
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{
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// Nothing more to do if we are consistent
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// Nothing more to do if we are consistent
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if (tapStateMachine->getResetDone ())
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if (tapStateMachine->getResetDone()) {
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{
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return true;
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return true;
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}
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}
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// Need to reset. If requested and this is the first cycle of reset, give a
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// Need to reset. If requested and this is the first cycle of reset, give a
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// warning.
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// warning.
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if (warn && (0 == resetCounter))
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if (warn && (0 == resetCounter)) {
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{
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std::cerr << "JTAG TAP state inconsistent: resetting" <<
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std::cerr << "JTAG TAP state inconsistent: resetting" << std::endl;
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std::endl;
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}
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}
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// Drive towards reset
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// Drive towards reset
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resetCounter++;
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resetCounter++;
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tms = 1;
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tms = 1;
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// If we have got to the end of the reset sequence we can clear the
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// If we have got to the end of the reset sequence we can clear the
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// tapStateMachine and report we are consistent. However we will not return
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// tapStateMachine and report we are consistent. However we will not return
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// true until the next call.
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// true until the next call.
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if (tapStateMachine->TAP_RESET_CYCLES == resetCounter)
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if (tapStateMachine->TAP_RESET_CYCLES == resetCounter) {
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{
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tapStateMachine->setResetDone (true);
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tapStateMachine->setResetDone (true);
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resetCounter = 0; // Ready for next time
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resetCounter = 0; // Ready for next time
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}
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} else {
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else
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{
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return false;
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return false;
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}
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}
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} // checkResetDone ()
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} // checkResetDone ()
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