David Brownell [Thu, 3 Dec 2009 06:57:07 +0000 (22:57 -0800)]
ARM11: don't expose WDTR
Don't expose the WDTR register through the register cache any
more. If anyone wants Tcl scripts to be able to use DCC based
communication with app code in the target, this wouldn't do it.
Bugfix: don't trust the Tcl-accessible version of DSCR to
flag whether WDTR needs to be restored when resuming.
David Brownell [Thu, 3 Dec 2009 06:57:07 +0000 (22:57 -0800)]
ARM11: don't expose RDTR
Don't expose the RDTR register through the register cache any
more. If anyone wants Tcl scripts to be able to use DCC based
communication with app code in the target, this wouldn't do it.
Bugfix: don't trust the Tcl-accessible version of DSCR to
flag whether RDTR needs to be restored when resuming.
David Brownell [Wed, 2 Dec 2009 23:24:14 +0000 (15:24 -0800)]
stubs: buildfix
The new stubs for httpd and ioutil gave errors like:
ioutil_stubs.c: In function ‘ioutil_init’:
ioutil_stubs.c:27: error: implicit declaration of function ‘LOG_DEBUG’
ioutil_stubs.c:28: error: ‘ERROR_OK’ undeclared (first use in this function)
ioutil_stubs.c:28: error: (Each undeclared identifier is reported only once
ioutil_stubs.c:28: error: for each function it appears in.)
Fix.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Zachary T Welch [Wed, 2 Dec 2009 03:58:32 +0000 (19:58 -0800)]
remove #if BUILD_HTTPD
Add httpd_stubs.c to provide no-op implementations of httpd_start()
and httpd_stop().
Allows these routines to be called unconditionally and ensures the
libocdserver ABI remains unchanged regardless of whether this feature
was built-in or not.
Prints a DEBUG message when the stub implementation is included.
David Brownell [Wed, 2 Dec 2009 19:31:32 +0000 (11:31 -0800)]
ARMv7a/Cortex-A8: report watchpoint trigger insn
Save and display the address of the instruction which triggered the
watchpoint. Because of pipelining, that's well behind the PC value
when debug entry completes. (Example in a subroutine that had been
returned from...)
Remove unused A8 stuff, mostly watchpoint hooks from the header.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
David Brownell [Wed, 2 Dec 2009 05:47:45 +0000 (21:47 -0800)]
ARM: core DPM support for watchpoints
This is a NOP unless the underlying core exposes two new methods, and
neither of the two cores using this (ARM11xx, Cortex-A8) do so yet.
This patch only updates those cores so they pass a flag saying whether
or not to update breakpoint and watchpoint status before resuming; and
removing some now-needless anti-segfault code from ARM11. Cortex-A8
didn't have that code ... yes, it segfaulted when setting watchpoints.
NOTE: this uses a slightly different strategy for setting/clearing
breakpoints than the ARM7/ARM9/etc code uses. It leaves them alone
unless it's *got* to change something, to speed halt/resume cycles
(including single stepping).
ALSO NOTE: this under-delivers for Cortex-A8, where regions with size
up to 2 GBytes can be watched ... it handles watchpoints which ARM11 can
also handle (size 1/2/4 bytes). Should get fixed later.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
David Brownell [Tue, 1 Dec 2009 08:49:11 +0000 (00:49 -0800)]
Cortex-A8: remove previous mcr()/mrc() methods
We don't need this code, now that the DPM code handles it.
Neither do we need the ARMv7-A CP15 operations; remove their
remnants too. And disable a mostly-needless diagnostic.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
David Brownell [Tue, 1 Dec 2009 08:49:04 +0000 (00:49 -0800)]
ARM: implement mrc()/mcr() as DPM ops
Instead of having separate ARM11 and Cortex-A8 implementations of
this code, have one shared implementation which just builds on the
existing "run instruction via R0" support.
This enables followup patches to remove that now-unused code from
those two drivers. (Patches to move the "mrc" and "mcr" code into
"struct arm" are due too ... MIPS and other cores do not support
those ARM-specific concepts.)
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
David Brownell [Tue, 1 Dec 2009 08:48:53 +0000 (00:48 -0800)]
target: "mcr" and "mrc" are ARM-specific
Switch "mrc" and "mcr" commands to be toplevel ARM operations,
as they should initially have been.
Correct the usage message for both commands: it matches ARM
documentation (as one wants!) instead of reordering them to
match the funky mrc() and mcr() method usage (sigh).
For Cortex-A8: restore a line that got accidentally dropped,
so the secure monitor mode shadow registers will show again.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
David Brownell [Tue, 1 Dec 2009 08:48:40 +0000 (00:48 -0800)]
Cortex-A8: stop using CP15 ops
There were two chunks of Cortex-A8 code which called the
ARMv7-A CP15 operations; get rid of them, helping prepare
to remove those methods completely:
- post_debug_entry() can use the mrc() method to read
its two registers.
- write_memory() can use dpm->instr_write_data_r0() to
flush the ICache and DCache ... doing it this way is
actually faster since it reduces per-write overhead.
Note that the mrc() method parameters are re-ordered with
respect to the ARM instruction documentation, so that part
can be confusing.
Cleaned up the layout and comments in those areas a bit.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Øyvind Harboe [Mon, 30 Nov 2009 08:13:56 +0000 (09:13 +0100)]
main: invoke jtag_interface_quit() explicitly
There is no particular reason to invoke jtag_interface_quit()
on the atexit() handler, it just makes the code more obtuse
and stops other legitimate usage of atexit().
Zachary T Welch [Sun, 29 Nov 2009 00:29:41 +0000 (16:29 -0800)]
improve command prohibition error report
Ensures that the correct information gets displayed, depending on the
mode of the command being denied. Fixes misreporting all commands as
needing to run "before 'init'".
David Brownell [Tue, 1 Dec 2009 03:14:19 +0000 (19:14 -0800)]
XScale: restore_context() cleanup
Clean up two aspects to this routine: bad naming, since it
doesn't restore the context, just the banked registers; and
excess indentation for the bulk of the code.
Also make some of its call sites stash the function's return
code; someday they should use it for error checking.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
David Brownell [Tue, 1 Dec 2009 03:14:19 +0000 (19:14 -0800)]
XScale: context restore, cleanup/bugfix
This "loop over all registers" routine shared the same mess as
full_context() in terms of dozens of needless number_to_mode()
calls. Fix that, and comments, with related cleanup.
The misnamed xscale_restore_context() had a related bug. It
was restoring the *WRONG REGISTERS* ... always from whatever
the current mode was, instead of using the copy from whichever
register bank it was trying to restore. (But it marked the
intended register as having been restored...) Fixed that.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Zachary T Welch [Mon, 30 Nov 2009 02:39:13 +0000 (18:39 -0800)]
command output capture: do not use interp global
Adds a log_capture_state structure to pass to the log capture
callback used by the command module. Ensures that the capture occurs
in the proper context.
Zachary T Welch [Mon, 30 Nov 2009 00:32:06 +0000 (16:32 -0800)]
make syntax errors respond with 'usage'
The 'help' text will become more verbose, so its entire text will be
far more than desired when you only borked your syntax. The usage
still allows the commands to be looked up for more help.
Zachary T Welch [Sun, 29 Nov 2009 23:58:16 +0000 (15:58 -0800)]
improve command_done() API and docs
command_done() does not need to return an error, but it needed
Doxygen comment. Provide some for copy_command_context as well.
Note: this audit revealed some potential bugs with the command context
implementation. There was a reason that commands were added at the
end of the list. Shallow copying of command_context means that
the list is shared between them. And commands added at the top-level
before the pre-existing commands will not be available in the shared
context as they were before. Yikes!
Fortunately, this does not seem to occur in general use, as
'add_help_text' gets registered in startup.tcl and claims the first slot
in my own test cases. Thus, it seems that we have been masking the issue
for now, but it shows the need for further architectural improvement in
the core command module.
Zachary T Welch [Sun, 29 Nov 2009 22:29:24 +0000 (14:29 -0800)]
only display usable commands in help
With the ability to defer 'init', users can access the help system while
still in CONFIG mode. This patch omits commands from the help and usage
list when they cannot be run in the current command mode, making it much
easier to see what can be done at a given time.
Zachary T Welch [Sun, 29 Nov 2009 22:04:21 +0000 (14:04 -0800)]
allow deferal of init
Adds 'noinit' command to prevent OpenOCD from running 'init' at the end
up startup, allowing it to be given from telnet or TCL. This provides
the old behavior by default, and users can add this command to their
scripts to get the new behavior.
Zachary T Welch [Sun, 29 Nov 2009 22:04:21 +0000 (14:04 -0800)]
move server_init() to openocd_main()
Moves the telnet and TCL server startup to server_init(), moving their
respective command registration in to server_register_commands().
Adds proper error checking for these particular startup processes.
Moves the core server startup to openocd_main(), improving related error
checking and preparing to defer 'init'.
Zachary T Welch [Sun, 29 Nov 2009 02:56:23 +0000 (18:56 -0800)]
improve gdb_init() sequence
Rework gdb_init to create flexible APIs (gdb_target_add_{one,all}) and
static helper (gdb_target_start) for starting GDB services. Eliminates
duplicated code and provides general mechanisms for adding GDB services.
The 'init' command is updated to call the new API, and later patches can
decouple its policy of adding all targets therein.
Provides the new capability to use both piped and TCP servers when
multiple targets are defined. The first target fills the pipe, and
others will be started on TCP ports (unless disabled, i.e. gdb_port=0).
Øyvind Harboe [Mon, 30 Nov 2009 07:43:49 +0000 (08:43 +0100)]
zy1000: keep up with changes to command structure
Add missing COMMAND_REGISTRATION_DONE.
For now the command syntax for zy1000 needs to be compatible
across 0.3/0.4, the world outside OpenOCD interfaces to
zy1000 using the old syntax. Post 0.4 release(0.4.1 even)
I'll switch to subcommand scheme.
David Brownell [Sun, 29 Nov 2009 21:04:56 +0000 (13:04 -0800)]
XScale: clean up full_context() (#1)
When fetching all the registers, XScale was doing various stupid
things like calling number_to_mode() a few dozen times instead of
just once, and mapping access to each register three times (again,
instead of just once). Stop that.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
David Brownell [Sun, 29 Nov 2009 07:08:05 +0000 (23:08 -0800)]
bugfix: 'init' changes state, not main()
Code other than main() may invoke "init". When it does so,
customized handlers may need to run ... so make sure the
command context state is updated before they do so.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
David Brownell [Sat, 28 Nov 2009 22:19:45 +0000 (14:19 -0800)]
Cortex-M3: don't chain "struct arm" commands
Those commands presume support for the "classic" set of CPU
modes (FIQ, supervisor, IRQ, etc) ... which aren't supported
by the ARMv7-M or ARMv6-M architectures. They also presume
a "struct arm" base type, which this code doesn't use.
We haven't cleaned up the register handling enough to be able
to share any of those "base" methods.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Zachary T Welch [Wed, 25 Nov 2009 20:57:28 +0000 (12:57 -0800)]
split jim_target into multiple handlers
The 'target' command group was implemented using its own command
dispatching, which can be eliminated by using the new chained command
registration mechanism. This patch splits the jim_target() function
into individual handlers, which makes them to be visible to the help and
usage commands. These one-trick handlers are much easier to understand.
Zachary T Welch [Thu, 26 Nov 2009 21:52:04 +0000 (13:52 -0800)]
improve jtag_tap_configure
Splits bulk of the jtag_tap_configure into jtag_tap_configure_event,
removing three or four levels of indentation in the process.
The resulting code was stylistically improved in other ways, but it
should be functionally identical.
Zachary T Welch [Thu, 26 Nov 2009 16:19:40 +0000 (08:19 -0800)]
begin moving JTAG jim handlers/helpers
Moves the tertiary jim handlers and required static helpers to the top
of tcl.c, defining them in a new registration array that is chained in
both the top-level context and under the jtag command. The top-level
commands can be removed at some point in the future to reduce clutter.
Zachary T Welch [Thu, 26 Nov 2009 05:35:24 +0000 (21:35 -0800)]
split jim_jtag_command into multiple handlers
Explodes the 'jtag' into separate command handlers, which are easier
to understand and extend. Makes the code much easier to understand,
though further simplifications are possible. This patch tries to
minimize the noise when viewed with 'git diff -w'.
Gives these commands improved built-in help and usage information.
Zachary T Welch [Sat, 28 Nov 2009 18:46:53 +0000 (10:46 -0800)]
remove redundant 'rm' command handler
Two 'rm' commands were implemented and registered. This removes the
version that would have never been called prior to refactoring the
command registration.
Zachary T Welch [Sat, 28 Nov 2009 18:42:51 +0000 (10:42 -0800)]
add error checking in command_new
Adds checks for memory allocation failures. Started to use calloc()
instead of malloc()/memset(), but I got carried away. This kind of work
should be done throughout the tree, but it's almost hopeless at present.
Zachary T Welch [Fri, 27 Nov 2009 18:16:42 +0000 (10:16 -0800)]
refactor command mode detection
Splits the check for a command's ability to run into a helper.
This also fixes a bug whereby commands that specified COMMAND_EXEC
were allowed to run during the configuration stage. This allowed
problematic commands to be called before 'init', defeating the intention
of specifying that command mode. With this change, the run_command()
helper denies access to handlers that should run only after 'init'
during the configuration stage.
Zachary T Welch [Sat, 28 Nov 2009 00:30:28 +0000 (16:30 -0800)]
add command private data setter/accessor
Presently, commands registration taks a static handler data pointer.
This patch adds support for commands that require a dynamic pointer,
such as those registered in a dynamic context (e.g. subcommands for a
user-created 'foo.cpu' command). The command_set_handler_data will
update a command (group) to use a new context pointer, while the
CMD_DATA macro allows command handlers to access the value.
Jim handlers should find this value in interp->cmdPrivData.
Zachary T Welch [Sat, 28 Nov 2009 05:47:54 +0000 (21:47 -0800)]
remove unknown handler
Updates command registration to provide top-level handlers for all
commands, rather than falling back onto the 'unknown' command. Instead,
that same handler is registered for placeholders, providing the same
functionality under the root verb command name instead. This permits
users to implement their own 'unknown' function, and it resolves some
mind-bending breakage related to function object lookup while recursing.
Changes 'ocd_bounce' to call 'ocd_command' and 'ocd_help' from the
wrapper directly, rather than bouncing through their wrappers. This
prevents endless recursion caused by the above changes, whereby the
'command' wrapper's type check would blow the stack to hell and gone.
Zachary T Welch [Sat, 28 Nov 2009 03:14:30 +0000 (19:14 -0800)]
improve command handler wrapper script
Adds 'ocd_bouncer' in startup.tcl that is called as a helper for
all command handlers, shrinking the embedded C wrapper to a mere stub.
Jim handlers are called directly, simple handlers get called with the
wrapper to capture and discard their output on error, and placeholders
call help directly (though the unknown handler still does this too).
It attempts to improve the quality of the error messages as well.
Zachary T Welch [Sat, 28 Nov 2009 02:59:14 +0000 (18:59 -0800)]
add 'command type' introspective handler
Adds the 'command' group handler, with the 'type' command producing
a string that tells whether the given command is 'native' (for Jim-based
command handlers), 'simple' (for simple built-in commands), 'group'
for command group placeholders, and 'unknown' if not found in the
command registration tables (e.g. core built-ins functions).
In target_type.h it's documented that the target must be
halted for add_breakpoint() ... and with slight ambiguity,
also for its add_watchpoint() sibling. So rather than
verifying that constraint in the CPU drivers, do it in the
target_add_{break,watch}point() routines.
Add minor paranoia on the remove_*point() paths too: save
the return value, and print it out in in the LOG_DEBUG message
in case it's nonzero.
Note that with some current cores, like all ARMv7 ones I've
looked at, there's no technical issue preventing watchpoint or
breakpoint add/remove operations on active cores. This model
seems deeply wired into OpenOCD though.
ALSO: the ARM targets were fairly "good" about enforcing that
constraint themselves. The MIPS ones were relied on other code
to catch such stuff, but it's not clear such code existed ...
keep an eye out for new issues on MIPS.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
David Brownell [Sat, 28 Nov 2009 02:50:26 +0000 (18:50 -0800)]
Cortex-A8: support "reset-assert" event
Use the new "reset-assert" event; else SRST; else fail.
Tested on an OMAP3, using the event.
NOTE: still doesn't handle "reset halt". For some reason
neither VCR nor PRCR seemed effective; they held the value
that was written, but VCR didn't trigger debug entry when
the reset vector fired (maybe the vector needs configuring?)
and PRCR refused to hold the chip in reset until deassert()
could force the core into debug state.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
David Brownell [Sat, 28 Nov 2009 02:50:20 +0000 (18:50 -0800)]
target: groundwork for "reset-assert" event
This defines a "reset-assert" event and a supporting utility
routine, and documents both how targets should implement it
and how config scripts should use it. Core-specific updates
are needed to make this work.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
David Brownell [Sat, 28 Nov 2009 02:40:37 +0000 (18:40 -0800)]
ARM11: write_memory() avoids increment check
When writing to a chip's "reset yourself" register, the ARM11 code
was reporting a spurious failure. Just don't bother checking for
correctly incremented pointers given single-unit writes ... it's
a bit faster that way too. (Reads should likely do the same thing.
For that matter, such checks are usually just a waste...)
Shrink an overlong parameter name, and associated lines'o'code.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Zachary T Welch [Fri, 27 Nov 2009 21:51:17 +0000 (13:51 -0800)]
fix regression causing duplicated output
The command refactoring caused subcommand handlers to produce duplicate
output when run. The problem was introduced by failing to ensure all
such invocations went through a top-level "catcher" script, prefixing
the command name with the 'ocd_' prefix and consuming its results.
The fix is to ensure such a top-level "catcher" script gets created
for each top-level command, regardless of whether it has a handler.
Indeed, this patch removes all command registrations for sub-commands,
which would not have worked in the new registration scheme anyway.
For now, dispatch of subcommands continues to be handled by the new
'unknown' command handler, which gets fixed here to strip the 'ocd_'
prefix if searching for the top-level command name fails initially.
Some Jim commands may be registered with this prefix, and that situation
seems to require the current fallback approach. Otherwise, that prefix
could be stripped unconditionally and the logic made a little simpler.
The same problem must be handled by the 'help' command handler too,
so its lookup process works as intended.
Overall, the command dispatching remains more complicated than desired,
but this patch fixes the immediate regressions.
Zachary T Welch [Fri, 27 Nov 2009 17:57:25 +0000 (09:57 -0800)]
fix 'nand info' command
Move device argument parsing after check for number of arguments;
otherwise, calling this command without any arguments would access
argv[0] before checking whether it even existed.
Dean Glazeski [Sun, 15 Nov 2009 08:32:38 +0000 (02:32 -0600)]
ARM NAND I/O read function.
Implementation of the NAND read function for ARM NAND I/O that
includes running a local algorithm on a device to increase the
performance of block reads.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>