util/ifdtool: Add a new switch -E to protect GPR0

This patch adds support for the new command-line option `-E` to
the ifdtool, which enables users (primarily factory users) to
protect GPR0.

Additionally, this patch refactors some code while adding support for
enabling GPR0 protection.

For more information on the scope of GPR0 (General Protection Range 0),
please refer to the Intel Meteor Lake-U Type 4 Client Platform SPI
Programming Guide, Document Number 768150.

BUG=b:270275115
TEST=Able to test GPR0 protection on google/rex and google/yahiko.

> ifdtool -p mtl -E image.bin -O image.bin_lock
...
Value at GPRD offset (64) is 0x83220004
--------- GPR0 Protected Range --------------
Start address = 0x00004000
End address = 0x00322fff
...
GPR0 protection is now enabled

Change-Id: I27c533ae4109c79299f4e7ff75e750d7cc64280f
Signed-off-by: Subrata Banik <subratabanik@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80235
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: Reka Norman <rekanorman@chromium.org>

0 files changed, 0 insertions, 0 deletions