Zachary T Welch [Wed, 11 Nov 2009 09:31:34 +0000 (01:31 -0800)]
add documention for writing built-in commands
This documentation update provides an introduction to the command
handling facilities provided by command.[ch]. A primer walks the user
through the elements of a pointedly pedantic module: src/hello.c.
A summary of the API is provided in the OpenOCD Architecture section.
Zachary T Welch [Wed, 11 Nov 2009 09:20:49 +0000 (01:20 -0800)]
add src/hello.c to augment new command tutorial
The hello module provides the 'hello' command, printing a greetings
to the command console. It can grow to serve as pedagogical example
of services that OpenOCD developers should use: a runnable style guide.
Zachary T Welch [Tue, 10 Nov 2009 08:02:18 +0000 (00:02 -0800)]
command_handler_t: make argc unsigned
The number of command arguments will always be 0 or more, so use
the right type in handlers. This has a cascading effect up through
the layers, but the new COMMAND_HANDLER macros prevented total chaos.
Zachary T Welch [Wed, 11 Nov 2009 06:23:07 +0000 (22:23 -0800)]
use CALL_COMMAND_HANDLER instead of direct calls
By using CALL_COMMAND_HANDLER, parameters can be reordered, added, or
even removed in inherited signatures, without requiring revisiting
all of the various call sites.
Zachary T Welch [Tue, 10 Nov 2009 09:39:30 +0000 (01:39 -0800)]
add FLASH_BANK_COMMAND_HANDLER macro
The FLASH_BANK_COMMAND_HANDLER provides an extended command handler
using the __COMMAND_HANDLER macro, whereby changing that macro is
sufficient to update flash handlers with the new signature. It also
enforces uniform style and scope when implementing this handler.
Zachary T Welch [Wed, 11 Nov 2009 03:00:01 +0000 (19:00 -0800)]
add command_handler_t type
This patch adds new typedefs for command handler callback functions.
Users of this type signature were updated to use these new types.
It uses the new __COMMAND_HANDLER macro to prevent duplication.
Zachary T Welch [Wed, 11 Nov 2009 02:51:32 +0000 (18:51 -0800)]
add COMMAND_HANDLER and COMMAND_HELPER macros
The COMMAND_HANDLER and COMMAND_HELPER macros allow commands to be
defined in a manner that decouples them from the exact order and type of
their parameters. Once converted, incremental changes to the command
handler type can be addressed in incremental patches that do not need to
touch the entire tree.
These macros' implementation, __COMMAND_HANDLER, is used to define the
new command_handler_t type, and additional patches will use it to derive
new macros to define extended command types (e.g. flash, nand, pld).
The CALL_COMMAND_HANDLER provides a means of calling helpers or nested
handlers from withing a command handler.
This patch uses C99 varadic macro expansion. Please report compilers
that cannot handle this code.
Zachary T Welch [Fri, 13 Nov 2009 05:19:41 +0000 (21:19 -0800)]
nand: rename device to nand
To be more informative (and consistent with flash and pld trees), change
'device' parameter name to 'nand' in NAND source files. This change
eliminates confusing 'device->device->' instance from the code, and
it simplifies the forthcoming command handler patches.
David Brownell [Fri, 13 Nov 2009 04:24:41 +0000 (20:24 -0800)]
ETM: start support for ETMv2+
ARM11 and newer cores include updated ETM modules. Recognize
their version codes and some key config differences. Sanity
checked on an OMAP2, with an ETM11RV r0p1 (ETMv3.1).
This still handles only scan chain 6, with at most 128 registers.
Newer cores (mostly, Cortex) will need to use the DAP instead.
Note that the newer ETM modules don't quite fit the quirky config
model of the older ones ... having more port widths is easy, but
the modes aren't the same. That still needs to change.
Fix a curious bug ... how did the register cache NOT get saved??
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Jonas Horberg [Thu, 12 Nov 2009 20:39:37 +0000 (12:39 -0800)]
parport: add support for the jtag_khz command.
Add the khz and speed_div functions to the parport interface driver.
Add the parport_toggling_time function that tells the parport driver
how long (in nanoseconds) it takes for the hardware to toggle TCK.
[dbrownell@users.sourceforge.net: tweak doc for clarity, mention
multimeter, and whitespace fixes]
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
David Brownell [Thu, 12 Nov 2009 05:57:44 +0000 (21:57 -0800)]
ETM: remove old mid-level ETM handle
Now that nothing uses the old ETM handle any more, remove it.
Add minimal header tweaks, letting non-ARM7 and non-ARM9 cores
access ETM facilities.
Now ARM11 could support standard ETM (and ETB) access as soon as
it derives from "struct arm" ... its scanchain 6 is used access
the ETM, just like ARM7 and ARM9.
The Cortex parts (both M3 and A8) will need modified access methods
(via ETM init parameters), so they use the DAP. Our first A8 target
(OMAP3) needs that for both ETM and ETB, but the M3 ETM isn't very
useful without SWO trace support (it's painfully stripped down), so
that support won't be worth adding for a while.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
David Brownell [Thu, 12 Nov 2009 05:55:19 +0000 (21:55 -0800)]
ETM: use new toplevel ETM handle
Make ETM itself use the new toplevel ETM handle, instead
of the to-be-removed lower level one. As of this patch,
nothing should be using the old ARM7/ARM9-specific handle.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
David Brownell [Thu, 12 Nov 2009 05:49:14 +0000 (21:49 -0800)]
ARM: start generalized base type
Rename "struct armv4_5_common_s" as "struct arm". It needs
a bit more work to be properly generic, and to move out of
this header, but it's the best start we have on that today.
Add and initialize an optional ETM pointer, since that will
be the first thing that gets generalized.
The intent being: all ARMs should eventually derive from
this "struct arm", so they can reuse the current ETM logic.
(And later, more.) Currently the ARM cores that *don't* so
derive are only ARMv7-M (and thus Cortex-M3) and ARM11.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Zachary T Welch [Wed, 11 Nov 2009 17:40:28 +0000 (09:40 -0800)]
add help regardless of callback
Add help for commands regardless of whether a handler is involved.
With this, all sorts of new commands can be found in 'help' text.
Hopefully, all of them have been documented....
Sadly, the lsort function appears to handle nested lists poorly, such
that sub-commands do not group with their parents.
Zachary T Welch [Wed, 11 Nov 2009 13:26:17 +0000 (05:26 -0800)]
add command_name helper
The command_name function returns a malloced string for a given
command and its parents. This can be used to display a message
to the user, but it is used internally to handle registration
and syntax errors. This helps permit arbitrary command nesting.
Zachary T Welch [Tue, 10 Nov 2009 12:27:15 +0000 (04:27 -0800)]
add const keyword to some APIs
Add 'const' keyword to 'char *' parameters to allow command handlers to
pass constant string arguments. These changes allow the 'args' command
handler to be changed to 'const' in a subsequent patch.
Zachary T Welch [Tue, 10 Nov 2009 10:43:11 +0000 (02:43 -0800)]
change argv to args in command handlers
Subsequent patches expect all command handlers to use a uniform
parameter naming scheme. In the entire tree, these two files used
standard 'argv' instead of our non-standard 'args'. This patch opts
to reduces the noise required to unify the command handlers, using
dominant 'args' form.
A future patch may be used to convert us back to the standard argv, but
that requires coordination with all developers to minimize disruptions.
Zachary T Welch [Tue, 10 Nov 2009 12:27:02 +0000 (04:27 -0800)]
makefiles: improve build order
Separates various groups of files to be built in logical succession.
In each layer, the core module (target.c, nand.c, etc.) is built _after_
their helper modules (e.g. image.c, nand_ecc.c) but _before_ any of
their drivers (e.g. arm966e.c, mx3_nand.c).
This allows problems introduced at the bottom of the stack to result
in build failures as soon as possible, as the helpers and core should
wrap portions of them.
David Brownell [Wed, 11 Nov 2009 12:42:50 +0000 (04:42 -0800)]
ETM cleanup
Various cleanups of ETM related code.
- Saner error return paths
- Simplify arm7_9 init ... no need for extra zeroing!
- Shrink some lines
- Tweak some diagnostics
- Use shorter name for ETM struct type.
- Don't exit()
and similar. The diagnostics look forward to having
this ETM code work with more than just ARM7/ARM9.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>