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docs: rpi3: add description for Trusted Board Boot 

Add paragraph for how to enable Trusted Board Boot for rpi3

Tested-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
Signed-off-by: Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>
This commit is contained in:
Ying-Chun Liu (PaulLiu) 2018-07-05 14:55:21 +08:00
parent 6a2c3c7fd8
commit ebbdbb1fd6
1 changed files with 10 additions and 0 deletions
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10
docs/plat/rpi3.rst
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@ -243,6 +243,16 @@ The following build options are supported:
BL32_EXTRA1=tee-pager_v2.bin BL32_EXTRA2=tee-pageable_v2.bin``
to put the binaries into the FIP.
- ``TRUSTED_BOARD_BOOT``: This port supports TBB. Set this option
``TRUSTED_BOARD_BOOT=1`` to enable it. In order to use TBB, you might
want to set ``GENERATE_COT=1`` to let the contents of the FIP automatically
signed by the build process. The ROT key will be generated and output to
``rot_key.pem`` in the build directory. It is able to set ROT_KEY to
your own key in PEM format.
Also in order to build, you need to clone mbedtls from
`here <https://github.com/ARMmbed/mbedtls>`__.
And set MBEDTLS_DIR to mbedtls source directory.
The following is not currently supported:
- AArch32 for TF-A itself.