Intel® Stratix® 10 Hard Processor System Remote System Update User Guide

ID 683021
Date 4/05/2023

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5.2. Arm Trusted Firmware Support

The Arm Trusted Firmware (ATF) runs at the EL3, the highest execution level on Cortex-A53. ATF is loaded as part of the boot process, and it remains resident.

ATF exports a SMC (Secure Monitor Call) handler which allows software running at lower execution levels to access services offered by the SDM such as FPGA configuration and RSU commands. Both U-Boot and Linux use the SMC handler.