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

ID 683021
Date 4/05/2023
Public

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2.7. Protected Access to Flash

After the HPS acquires QSPI flash ownership in the bootloader, the HPS has full access to QSPI and can potentially corrupt the flash.

In order to minimize the risk of rendering the system non-operational, decision firmware, decision firmware data, and factory image areas are not exposed as Linux* Memory technology device (MTD) devices.

Another option to protect the flash may be to use QSPI vendor specific commands to mark the decision firmware, decision firmware data, and factory image areas as read-only. However, that may result in a more complex procedure for updating the decision firmware, decision firmware data, and factory image areas.