The model is that this fires after scanchain verification, when it's
safe to call "jtag tapenable $TAPNAME". So it will fire as part of
non-error paths of "init" and "reset" command processing. However it
will *NOT* trigger during "jtag_reset" processing, which skips all
scan chain verification, or after verification errors.
ALSO:
- switch DaVinci chips to use this new mechanism
- log TAP activation/deactivation, since their IDCODEs aren't verified
- unify "enum jtag_event" scripted event notifications
- remove duplicative JTAG_TAP_EVENT_POST_RESET
git-svn-id: svn://svn.berlios.de/openocd/trunk@2800 b42882b7-edfa-0310-969c-e2dbd0fdcd60
Change the handling of the "-ircapture" and "-irmask" parameters
to be slightly more sensible, given that the JTAG spec describes
what is required, and that we already require that conformance in
one place. IR scan returns some bitstring with LSBs "01".
- First, provide and use default values that satisfy the IEEE spec.
Existing TAP configs will override the defaults, but those parms
are no longer required.
- Second, warn if any TAP gets set up to violate the JTAG spec.
It's likely a bug, but maybe not; else this should be an error.
Improve the related diagnostics to say which TAP is affected.
And associated minor fixes/cleanups to comments and diagnostics.
git-svn-id: svn://svn.berlios.de/openocd/trunk@2758 b42882b7-edfa-0310-969c-e2dbd0fdcd60
- Shrink messaging during resets, primarily by getting rid of
"nothing happened" noise that hides *useful* information.
- Improve: the "no IDCODE" message by identifying which tap only
supports BYPASS; and the TAP event strings.
Related minor code updates:
- Remove two needless tests when examining the chain: we know
we have a TAP, and that all TAPs have names.
- Clean up two loops, turning "while"s into "for"s which better
show what's actually being done.
git-svn-id: svn://svn.berlios.de/openocd/trunk@2736 b42882b7-edfa-0310-969c-e2dbd0fdcd60
for disabling TAPs. We don't actually know how to make any
JRCs which do that yet; but when we do, this will matter.
git-svn-id: svn://svn.berlios.de/openocd/trunk@2735 b42882b7-edfa-0310-969c-e2dbd0fdcd60
avoid a duplicate test.
Plus other cleanup in the same code: be "static", sane line lengths
for source and diagnostics, and fix misleading variable names.
git-svn-id: svn://svn.berlios.de/openocd/trunk@2725 b42882b7-edfa-0310-969c-e2dbd0fdcd60
- Infinite loop bugfix when running tap configure a second time
git-svn-id: svn://svn.berlios.de/openocd/trunk@2681 b42882b7-edfa-0310-969c-e2dbd0fdcd60
Change jtag_rclk behaviour so it can be called before the interface init function
git-svn-id: svn://svn.berlios.de/openocd/trunk@2590 b42882b7-edfa-0310-969c-e2dbd0fdcd60
Warn about anyone using "jtag_speed" commands; that command is obsolete, and will someday be removed.
git-svn-id: svn://svn.berlios.de/openocd/trunk@2578 b42882b7-edfa-0310-969c-e2dbd0fdcd60
Add "jtag names" command, mirroring "target names" but returning
TAP names instead of target names. This starts letting TAPs be
manipulated in scripts ... much like what works now for targets.
It's a bit limited just yet, since "jtag cget $TAPNAME" doesn't
expose all TAP attributes. "$TARGETNAME cget" is more functional.
git-svn-id: svn://svn.berlios.de/openocd/trunk@2428 b42882b7-edfa-0310-969c-e2dbd0fdcd60
- Adds new source files to encapsulate static/dynamic module handling.
- Further work should implement the jtag_interface_modules_load routine,
to populate the jtag_interfaces list from shared libraries in a path.
git-svn-id: svn://svn.berlios.de/openocd/trunk@2413 b42882b7-edfa-0310-969c-e2dbd0fdcd60
Fix a bug preventing ICEpick "enable that TAP" code from working:
the "runtest" command wrongly finished with a JTAG reset, discarding
the work the TAP enable handler just finished! Instead, JTAG should
stay in RUN/IDLE state.
git-svn-id: svn://svn.berlios.de/openocd/trunk@2252 b42882b7-edfa-0310-969c-e2dbd0fdcd60
Extend the internal JTAG event handlers to cover enable/disable,
and use those events to make sure that targets get "examined" if
they were disabled when the scan chain was first set up:
- Remove "enum jtag_tap_event", merge with "enum jtag_event",
so C code can now listen for TAP enable/disable events.
- Report those events so they can trigger callbacks.
- During startup, make target_examine() register a handler to
catch ENABLE events for any then-disabled targets.
This fixes bugs like "can't halt target after enabling its TAP".
One class of unresolved bugs: if the target has an ETM hooked
up to an ETB, nothing activates the ETB. But starting up the
ETM without access to the ETB registers fails...
git-svn-id: svn://svn.berlios.de/openocd/trunk@2251 b42882b7-edfa-0310-969c-e2dbd0fdcd60
Tighten error handling on TAP enable/disable paths a bit:
- Don't enable/disable unless it's necessary. Those event
handlers could have nasty side effects...
- Don't *succeed* enables/disables if there was no code which
could have implemented that action. This prevents bugs like
wrongly acting as if the scan chain changed.
- Minor whitespace cleanup in enable/disable command code.
The big problem is still the lack of code to verify scan chains
were actually updated as requested; this adds a comment on that.
I suspect the best we can do near term will be to verify IDCODE.
git-svn-id: svn://svn.berlios.de/openocd/trunk@2250 b42882b7-edfa-0310-969c-e2dbd0fdcd60
Fix bug in a warning. It warned about "huge IRlength" for an
older JRC with a two bit instruction register ... wrong!
git-svn-id: svn://svn.berlios.de/openocd/trunk@2249 b42882b7-edfa-0310-969c-e2dbd0fdcd60
Doc update: say "jtag newtap ... -disable" records the
state after exiting the RESET state, matching the only
implementation we're working with so far (TI ICEpick-C).
Matching code updates. Now we can be sure that the
"enabled" flag value is correct after JTAG resets.
git-svn-id: svn://svn.berlios.de/openocd/trunk@2246 b42882b7-edfa-0310-969c-e2dbd0fdcd60
Minor jtag cleanup:
- remove hidden assumption about JTAG event numbering
- move function declarations to a header
- some end'o'line whitespace
- use "calloc" not "malloc + memset"
git-svn-id: svn://svn.berlios.de/openocd/trunk@2244 b42882b7-edfa-0310-969c-e2dbd0fdcd60
Currently the "debug_level 3" command tracing ignores commands
that could return values to TCL scripts (by plugging in to a
slightly lower level of the interpreter stack).
Fix that by abstracting the tracing command and starting to
make some of those previously-untraced commands use this new
mechanism.
git-svn-id: svn://svn.berlios.de/openocd/trunk@2224 b42882b7-edfa-0310-969c-e2dbd0fdcd60
Partial fix to the "long IR length" problems.
- Current code could handle up to 32 bit IR lengths with
full functionality, if it didn't just reject may of them
out of hand. So only reject clear errors, where the IR
mask (or capture instruction) needs more than IrLen bits.
- Longer IR lengths can only be handled in BYPASS mode
for now. Example: TI's DSPs use 38-bit IR lengths.
So we can't issue their IDCODE instructions...
A more complete fix would be able to issue longer instructions;
or minimally, would fail cleanly for the non-BYPASS case.
Note that this *could* make some currently broken scripts fail,
since the previous code accepted garbage values so long as
they didn't use more than 16 bits.
git-svn-id: svn://svn.berlios.de/openocd/trunk@2222 b42882b7-edfa-0310-969c-e2dbd0fdcd60
- Use the default KHz speed setting, in case interface is not initialized.
git-svn-id: svn://svn.berlios.de/openocd/trunk@2218 b42882b7-edfa-0310-969c-e2dbd0fdcd60
- Use parse_uint helper to ensure argument is parsed properly.
git-svn-id: svn://svn.berlios.de/openocd/trunk@2216 b42882b7-edfa-0310-969c-e2dbd0fdcd60
- Use parse_u32 helper to ensure scan values are parsed properly.
- Clear the fields buffer to ensure partial cleanup occur correctly.
git-svn-id: svn://svn.berlios.de/openocd/trunk@2214 b42882b7-edfa-0310-969c-e2dbd0fdcd60
- Add new jtag_config_khz to increase encapsulation of jtag->khz call.
- Add new jtag_get_speed_readable to encapsulate of jtag->speed_div call.
- Make definition of jtag static in core.c, remove extern from tcl.c.
git-svn-id: svn://svn.berlios.de/openocd/trunk@2171 b42882b7-edfa-0310-969c-e2dbd0fdcd60
- Move nvp_jtag_tap_event and jtag_tap_handle_event to tcl.c.
- Change both to be static; remove declaration of function from jtag.h.
git-svn-id: svn://svn.berlios.de/openocd/trunk@2166 b42882b7-edfa-0310-969c-e2dbd0fdcd60
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