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46d6b04712
The cr50 RO image compares INFO rollback map space against the
contents of the RW image's infomap field.
To ensure that no rollback is possible, the RW should verify that the
INFO space state is consistent with the current RW and RW_B headers,
and if not, update the INFO state to comply.
This should happen only when running prod images, so that debug images
could be rolled back if so desired.
Also fixed the bug in functions enabling read and write access to the
INFO1 region. Write access is now a superset of read access setting.
BRANCH=cr50
BUG=b:35774863
TEST=as follows:
- built and ran a new image, observed it start successfully;
- modified the manifest to erase the first map location, built and
ran a new image, observed it start successfully
- restored the manifest, built and tried running a new image,
observed that the earlier version is starting.
Change-Id: I62253c3e98cd24ed24424b8bb9de22692a262d89
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/447966
Reviewed-by: Marius Schilder <mschilder@chromium.org>
Reviewed-by: Mary Ruthven <mruthven@chromium.org>
For an overview of the Embedded Controller firmware, refer to http://www.chromium.org/chromium-os/2014-firmware-summit For instructions on building from source, refer to http://www.chromium.org/chromium-os/ec-development/getting-started-building-ec-images-quickly