questions on CONFIG_PPC_ADV_DEBUG_REGS, DBCR0_BRT, and DBCR0_ACTIVE_EVENTS
scottwood at freescale.com
Wed Apr 23 08:31:36 EST 2014
On Tue, 2014-04-22 at 05:43 -0700, shiva7 wrote:
> I have the same question as like above posted by Mr. Chirs.
I had to google the subject to find what e-mail you were talking about
-- it was posted a year ago:
Next time please quote the e-mail if you're trying to revive a thread,
and keep the original poster on CC.
I've quoted it here:
> Sorry for the bunch of emails, I'm working on some new stuff and running
> into issues.
> For CONFIG_BOOKE it appears that DBCR0_ACTIVE_EVENTS includes DBCR0_ICMP
> but not DBCR0_BRT. Is that just because none of the code paths
> currently using DBCR0_ACTIVE_EVENTS need to check DBCR0_BT?
Perhaps it was just an oversight. I've CCed Dave Kleikamp and Torez
Smith, who added DBCR0_ACTIVE_EVENTS.
> Also, in sys_debug_setcontext() why does SIG_DBG_BRANCH_TRACING return
> -EINVAL if CONFIG_PPC_ADV_DEBUG_REGS is set? Would it not be possible
> to use DBCR0_BRT?
Either nobody has gotten around to implementing it, or the semantics
are different in some way (if the semantics are even defined anywhere
-- I couldn't find any documentation).
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