Vincent Palatin 3df8bd8772 cortex-m: allow to lock/unlock empty MPU region ...

When the MPU region to modify is empty (size == 0) returns EC_SUCCESS
rather than EC_ERROR_INVAL, so we are not failing MPU activation on
systems without anything in the .iram.text section.

Signed-off-by: Vincent Palatin <vpalatin@chromium.org>

BRANCH=all
BUG=chrome-os-partner:35774
TEST=on Samus, with WP, try "sysjump disable" on the EC command line
and see "RAM locked. Exclusion 20006ee0-20006ee0" message.

Change-Id: I0103e0f7aa81ee64a70dd47ffb1c50067ce5a6ee
Reviewed-on: https://chromium-review.googlesource.com/242690
Trybot-Ready: Vincent Palatin <vpalatin@chromium.org>
Tested-by: Vincent Palatin <vpalatin@chromium.org>
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Commit-Queue: Vincent Palatin <vpalatin@chromium.org>

2015-01-23 19:56:17 +00:00

..

cortex-m

cortex-m: allow to lock/unlock empty MPU region

2015-01-23 19:56:17 +00:00

cortex-m0

fix off-by-one in flash size check

2015-01-14 21:50:10 +00:00

host

Stop mutex_lock() from eating pending events

2014-11-22 09:34:23 +00:00

nds32

Stop mutex_lock() from eating pending events

2014-11-22 09:34:23 +00:00