Security Level Staging
After power-on-reset, the Security Manager determines the initial security level by verifying and reading the fuse data. The Security Manager stores the fuse data in the fuse shadow register, HPS_fusesec. From this point, the boot ROM reads the fuse data from the shadow register and also verifies the security header, if present, in the boot image stored on boot flash partition. The second-stage boot loader is the boot image.
The security header may also contain information to raise the security level for a particular feature implemented in the fuses. The boot ROM merges the fuse values in the shadow registers with the security header values to establish the final security level of the system.
Did you find the information on this page useful?