tree aa5166126f2735545326fe8af8a76627f5760191
parent cad08acebf4b7d993b0cefb9af67208c48fb9a5e
author Jason Wessel <jason.wessel@windriver.com> 1270226822 -0500
committer Jason Wessel <jason.wessel@windriver.com> 1270238298 -0500

kgdb: eliminate kgdb_wait(), all cpus enter the same way

This is a kgdb architectural change to have all the cpus (master or
slave) enter the same function.

A cpu that hits an exception (wants to be the master cpu) will call
kgdb_handle_exception() from the trap handler and then invoke a
kgdb_roundup_cpu() to synchronize the other cpus and bring them into
the kgdb_handle_exception() as well.

A slave cpu will enter kgdb_handle_exception() from the
kgdb_nmicallback() and set the exception state to note that the
processor is a slave.

Previously the salve cpu would have called kgdb_wait().  This change
allows the debug core to change cpus without resuming the system in
order to inspect arch specific cpu information.

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>