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Deprecate the MN10300 arch's gdbstub in favour of KGDB, which is more capable
in some areas (such as SMP) and almost as capable in others (it's I/O is not as
decoupled and it can't start as early). gdbstub will be removed in a later
version when we're satisfied with KGDB's working.
Signed-off-by: David Howells <dhowells@redhat.com>
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Introduce a general config option for kernel debugger hooks so that both
gdbstub and kgdb can use it and add a header file for both debuggers to use.
Signed-off-by: David Howells <dhowells@redhat.com>
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Restrict single-stepping through the kernel using gdbstub to non-preemptable
non-SMP configs as gdbstub has to do software single-stepping by means of
temporary breakpoints. Hardware single-stepping is unavailable as Panasonic
have not sufficiently documented the interface to it.
Software single-stepping through preemptable or SMP kernels runs into problems
as it makes it much more likely that the wrong thread will hit the temporary
breakpoints. It seems impractical to work around the problem for the most
part. It could be possible to make a UP preemptable kernel switch temporary
breakpoints in and out in switch_to().
Signed-off-by: David Howells <dhowells@redhat.com>
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The configuration choice for the port on which the GDB stub listens has
a default of GDBSTUB_TTYSM0, but this should be GDBSTUB_ON_TTYSM0 to
match the option.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Add configurable built-in testing for the MN10300 misalignment handler.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Add architecture support for the MN10300/AM33 CPUs produced by MEI to the
kernel.
This patch also adds board support for the ASB2303 with the ASB2308 daughter
board, and the ASB2305. The only processor supported is the MN103E010, which
is an AM33v2 core plus on-chip devices.
[akpm@linux-foundation.org: nuke cvs control strings]
Signed-off-by: Masakazu Urade <urade.masakazu@jp.panasonic.com>
Signed-off-by: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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