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smp: deprecate legacy SMP core switching support

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The deprecation was already in the documentation since v0.11.0
through commit 85ba2dc4c6 ("rtos/hwthread: add hardware-thread
pseudo rtos") but OpenOCD was not informing the user printing a
runtime message.

Remove the deprecated method from the documentation and print a
deprecated message at runtime.
There is no reliable way to print the same message in GDB console,
so we have to rely on user noticing it in the OpenOCD log.
Target is to remove the functionality after v0.12.0.

Change-Id: Idd2d9e3b6eccc92dcf0432c3c7de2f8a0fcabe9f
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/6862
Tested-by: jenkins
This commit is contained in:
Antonio Borneo
2022-02-28 11:46:46 +01:00
parent 66335683fe
commit b4f8d99c8d
4 changed files with 11 additions and 51 deletions
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51
doc/openocd.texi
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@@ -11568,57 +11568,6 @@ The @command{step} and @command{stepi} commands can be used to step a specific c
while other cores are free-running or remain halted, depending on the
scheduler-locking mode configured in GDB.
@section Legacy SMP core switching support
@quotation Note
This method is deprecated in favor of the @emph{hwthread} pseudo RTOS.
@end quotation
For SMP support following GDB serial protocol packet have been defined :
@itemize @bullet
@item j - smp status request
@item J - smp set request
@end itemize
OpenOCD implements :
@itemize @bullet
@item @option{jc} packet for reading core id displayed by
GDB connection. Reply is @option{XXXXXXXX} (8 hex digits giving core id) or
@option{E01} for target not smp.
@item @option{JcXXXXXXXX} (8 hex digits) packet for setting core id displayed at next GDB continue
(core id -1 is reserved for returning to normal resume mode). Reply @option{E01}
for target not smp or @option{OK} on success.
@end itemize
Handling of this packet within GDB can be done :
@itemize @bullet
@item by the creation of an internal variable (i.e @option{_core}) by mean
of function allocate_computed_value allowing following GDB command.
@example
set $_core 1
#Jc01 packet is sent
print $_core
#jc packet is sent and result is affected in $
@end example
@item by the usage of GDB maintenance command as described in following example (2 cpus in SMP with
core id 0 and 1 @pxref{definecputargetsworkinginsmp,,Define CPU targets working in SMP}).
@example
# toggle0 : force display of coreid 0
define toggle0
maint packet Jc0
continue
main packet Jc-1
end
# toggle1 : force display of coreid 1
define toggle1
maint packet Jc1
continue
main packet Jc-1
end
@end example
@end itemize
@node Tcl Scripting API
@chapter Tcl Scripting API
@cindex Tcl Scripting API