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simplify XScale debug handler installation

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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: David Brownell <dbrownell@users.sourceforge.net>
This commit is contained in:
David Brownell
2009-10-12 02:39:18 -07:00
parent 9f6c23f479
commit 5e837387aa
6 changed files with 59 additions and 45 deletions
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@@ -125,9 +125,6 @@ Once the above are completed:
- general layer cleanup: @par
https://lists.berlios.de/pipermail/openocd-development/2009-May/006590.html
- regression: xscale does not place debug_handler.bin into the right spot. workaround:
use -s option on command line to place xscale/debug_handler.bin in search path @par
https://lists.berlios.de/pipermail/openocd-development/2009-July/009338.html
- bug: either USBprog is broken with new tms sequence or there is a general
problem with XScale and the new tms sequence. Workaround: use "tms_sequence long"
@par