1Trusty Dispatcher
2=================
3
4Trusty is a a set of software components, supporting a Trusted Execution
5Environment (TEE) on mobile devices, published and maintained by Google.
6
7Detailed information and build instructions can be found on the Android
8Open Source Project (AOSP) webpage for Trusty hosted at
9https://source.android.com/security/trusty
10
11Boot parameters
12---------------
13
14Custom boot parameters can be passed to Trusty by providing a platform
15specific function:
16
17.. code:: c
18
19    void plat_trusty_set_boot_args(aapcs64_params_t *args)
20
21If this function is provided ``args->arg0`` must be set to the memory
22size allocated to trusty. If the platform does not provide this
23function, but defines ``TSP_SEC_MEM_SIZE``, a default implementation
24will pass the memory size from ``TSP_SEC_MEM_SIZE``. ``args->arg1``
25can be set to a platform specific parameter block, and ``args->arg2``
26should then be set to the size of that block.
27
28Supported platforms
29-------------------
30
31Out of all the platforms supported by Trusted Firmware-A, Trusty is only
32verified and supported by NVIDIA's Tegra SoCs.
33