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  15. Nov 24, 2009
    • David Brownell's avatar
      ARM11: use standard single step simulation · bf3abc48
      David Brownell authored 
      
The previous stuff was needed because the ARM11 code wasn't using
the standard ARM base type and register access ... but now those
mechanisms work, so we can switch out that special-purpose glue.

This should resolve all the "FIXME -- handle Thumb single stepping"
comments too, and properly handle the processor's mode.  (Modulo
the issue that this code doesn't yet handle two-byte breakpoints.)

Clarify the comments about the the hardware single stepping.  When
we eventually share breakpoint code with Cortex-A8, we can just make
that be the default on cores which support it.  We may still want an
override command, not just to facilitate testing but to cope with
"instruction address mismatch" not quite being true single-step.

Signed-off-by: default avatarDavid Brownell <dbrownell@users.sourceforge.net>
      bf3abc48
  17. Nov 22, 2009
  19. Nov 05, 2009
  21. Oct 26, 2009
    • Øyvind Harboe's avatar
      Idea for adding watchpoint masks. · 8b30f22d
      Øyvind Harboe authored
      8b30f22d
    • David Brownell's avatar
      JTAG: simple autoprobing · 6cb1d10c
      David Brownell authored 
      
This patch adds basic autoprobing support for the JTAG scan chains
which cooperate.  To use, you can invoke OpenOCD with just:

 - interface spec: "-f interface/...cfg"
 - possibly with "-c 'reset_config ...'" for SRST/TRST
 - possibly with "-c 'jtag_khz ...'" for the JTAG clock

Then set up config files matching the reported TAPs.  It doesn't
declare targets ... just TAPs.  So facilities above the JTAG and
SVF/XSVF levels won't be available without a real config; this is
almost purely a way to generate diagnostics.

Autoprobe was successful with most boards I tested, except ones
incorporating C55x DSPs (which don't cooperate with this scheme
for IR length autodetection).  Here's what one multi-TAP chip
reported, with the "Warn:" prefixes removed:

 clock speed 500 kHz
 There are no enabled taps.  AUTO PROBING MIGHT NOT WORK!!
 AUTO auto0.tap - use "jtag newtap auto0 tap -expected-id 0x2b900f0f ..."
 AUTO auto1.tap - use "jtag newtap auto1 tap -expected-id 0x07926001 ..."
 AUTO auto2.tap - use "jtag newtap auto2 tap -expected-id 0x0b73b02f ..."
 AUTO auto0.tap - use "... -irlen 4"
 AUTO auto1.tap - use "... -irlen 4"
 AUTO auto2.tap - use "... -irlen 6"
 no gdb ports allocated as no target has been specified

The patch tweaks IR setup a bit, so we can represent TAPs with
undeclared IR length.

Signed-off-by: default avatarDavid Brownell <dbrownell@users.sourceforge.net>
      6cb1d10c
  23. Oct 25, 2009
  25. Oct 24, 2009
  27. Oct 23, 2009
    • David Brownell's avatar
      SVF: clean up, mostly for TAP state name handling · 814183a5
      David Brownell authored 
      
 - Use the name mappings all the other code uses:
    + name-to-state ... needed to add one special case
    + state-to-name
 - Improve various diagnostics:
    + don't complain about a "valid" state when the issue
      is actually that it must be "stable"
    + say which command was affected
 - Misc:
    + make more private data and code be static
    + use public DIM() not private dimof()
    + shorten the affected lines

Re the mappings, this means we're more generous in inputs we
accept, since case won't matter.  Also our output diagnostics
will be a smidgeon more informative, saying "RUN/IDLE" not
just "IDLE" (emphasizing that there can be side effects).

Signed-off-by: default avatarDavid Brownell <dbrownell@users.sourceforge.net>
      814183a5
  29. Oct 20, 2009
  31. Oct 13, 2009
  33. Oct 12, 2009
    • David Brownell's avatar
      simplify XScale debug handler installation · 5e837387
      David Brownell authored 
      
Load the XScale debug handler from the read-only data section
instead of from a separate file that can get lost or garbaged.
This eliminates installation and versioning issues, and also
speeds up reset handling a bit.

Plus some minor bits of cleanup related to loading that handler:
comments about just what this handler does, and check fault codes
while writing it into the mini-icache.

The only behavioral changes should be cleaner failure modes after
errors during handler loading, and being a bit faster.

NOTE:  presumes GNU assembly syntax, with ".incbin"; and ELF,
because of the syntax of the ".size" directive.

Signed-off-by: default avatarDavid Brownell <dbrownell@users.sourceforge.net>
      5e837387
  35. Oct 07, 2009
  37. Sep 27, 2009
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  55. Jul 08, 2009