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Line 28... |
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// $Id$
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// $Id$
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#include "JtagSC.h"
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#include "JtagSC.h"
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SC_HAS_PROCESS( JtagSC );
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SC_HAS_PROCESS( JtagSC );
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//! Constructor for the JTAG handler.
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//! Constructor for the JTAG handler.
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//! @param[in] name Name of this module, passed to the parent
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//! @param[in] name Name of this module, passed to the parent
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//! constructor.
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//! constructor.
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//! @param[in] fifo_size Size of the FIFO on which to queue TAP actions.
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//! @param[in] fifo_size Size of the FIFO on which to queue TAP actions.
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JtagSC::JtagSC (sc_core::sc_module_name name,
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JtagSC::JtagSC(sc_core::sc_module_name name, int fifo_size):
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int fifo_size) :
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sc_module(name), currentTapAction(NULL)
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sc_module (name),
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currentTapAction (NULL)
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{
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{
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tapActionQueue = new sc_core::sc_fifo<TapAction *> (fifo_size);
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tapActionQueue = new sc_core::sc_fifo<TapAction *> (fifo_size);
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stateMachine = new TapStateMachine ();
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stateMachine = new TapStateMachine ();
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SC_METHOD (processActions);
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SC_METHOD (processActions);
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sensitive << tck.pos ();
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sensitive << tck.pos ();
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} // JtagSC ()
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} // JtagSC ()
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//! Destructor for the JTAG handler.
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//! Destructor for the JTAG handler.
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//! Give up our state machine and FIFO
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//! Give up our state machine and FIFO
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JtagSC::~JtagSC ()
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JtagSC::~JtagSC ()
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delete stateMachine;
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delete stateMachine;
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delete tapActionQueue;
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delete tapActionQueue;
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} // ~JtagSC ()
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} // ~JtagSC ()
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//! Method to drive the jtag ports.
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//! Method to drive the jtag ports.
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//! Initial version just drives the reset.
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//! Initial version just drives the reset.
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void
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void
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{
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{
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// TRST is driven as the inverse of the system reset
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// TRST is driven as the inverse of the system reset
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trst = !sysReset;
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trst = !sysReset;
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// Do nothing else if in CPU reset (active high)
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// Do nothing else if in CPU reset (active high)
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if (sysReset)
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if (sysReset) {
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{
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return;
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return;
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}
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}
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// Functions setting the outputs will need bools (they are not generally
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// Functions setting the outputs will need bools (they are not generally
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// SystemC modules, so don't handle the likes of sc_in<> correctly).
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// SystemC modules, so don't handle the likes of sc_in<> correctly).
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bool tdi_o;
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bool tdi_o;
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bool tms_o;
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bool tms_o;
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// Try to get an action if we don't have one
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// Try to get an action if we don't have one
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if (NULL == currentTapAction)
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if (NULL == currentTapAction) {
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{
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if (false == tapActionQueue->nb_read(currentTapAction)) {
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if (false == tapActionQueue->nb_read (currentTapAction))
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{
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// Nothing there, so head for Run-Test/Idle state.
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// Nothing there, so head for Run-Test/Idle state.
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stateMachine->targetState (TAP_RUN_TEST_IDLE, tms_o);
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stateMachine->targetState (TAP_RUN_TEST_IDLE, tms_o);
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tms = tms_o;
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tms = tms_o;
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return;
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return;
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}
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}
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}
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}
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// Process the action, notifying the originator when done.
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// Process the action, notifying the originator when done.
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if (currentTapAction->process (stateMachine, tdi_o, tdo, tms_o))
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if (currentTapAction->process(stateMachine, tdi_o, tdo, tms_o)) {
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{
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currentTapAction->getDoneEvent()->notify();
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currentTapAction->getDoneEvent()->notify();
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currentTapAction = NULL;
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currentTapAction = NULL;
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}
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}
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// Select the new TAP state
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// Select the new TAP state
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stateMachine->nextState (tms_o);
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stateMachine->nextState (tms_o);
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// Drive the signal ports
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// Drive the signal ports
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tdi = tdi_o;
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tdi = tdi_o;
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