tree f8a5a5867dfbe1fa9f1ee5ed21928bd8daa392e9
parent 4586b0c1dea8af8fd603ee7f1a0f6271bdcc1963
author Simon Glass <sjg@chromium.org> 1539740208 -0600
committer chrome-bot <chrome-bot@chromium.org> 1542373305 -0800

Add a screen showing a menu for alternative firmware

At present we allow the user to press a keypad number to boot into another
bootloader but there is no indication which one is which.

Add a new screen for this. It is entered via Ctrl-L and shows the
available bootloaders, along with the number to press for each. The
contents of the screen is rendered by the bootloader, as usual.

This is supported by two new screens, one for the keyboard UI and one for
the menu UI. Also a new function, VbExGetAltFwIdxMask(), is added to find
out what bootloaders are available.

Note: This CL combines changes for both UIs. The changes may be easier to
review separately.

CQ-DEPEND=CL:1273269
BUG=chromium:837018
BRANCH=none
TEST=FEATURES=test emerge-grunt --nodeps vboot_reference

Change-Id: Ib3227545dc677c8f9587944753e32f3b49647360
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1273268
Reviewed-by: Julius Werner <jwerner@chromium.org>