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trusty: Add boot parameter documentation 

Change-Id: Ibfb75145e3a31ae2106eedfbe4a91c2e31bb9f2a
This commit is contained in:
Arve Hjønnevåg 2018-03-05 12:13:22 -08:00
parent 2686f9fdc3
commit 0e9c7f27cd
1 changed files with 17 additions and 0 deletions
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docs/spd/trusty-dispatcher.rst
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@ -8,6 +8,23 @@ Detailed information and build instructions can be found on the Android
Open Source Project (AOSP) webpage for Trusty hosted at
https://source.android.com/security/trusty
Boot parameters
===============
Custom boot parameters can be passed to Trusty by providing a platform
specific function:
.. code:: c
void plat_trusty_set_boot_args(aapcs64_params_t *args)
If this function is provided ``args->arg0`` must be set to the memory
size allocated to trusty. If the platform does not provide this
function, but defines ``TSP_SEC_MEM_SIZE``, a default implementation
will pass the memory size from ``TSP_SEC_MEM_SIZE``. ``args->arg1``
can be set to a platform specific parameter block, and ``args->arg2``
should then be set to the size of that block.
Supported platforms
===================