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Programming TZASC in Secure Mode

sarjoon

Hi everyone,

I am working to setup the TZASC on I.MX6UL based dev platform platform.

I did the following.

- Running SPL bootloader from OCRAM

- Disable the bypass (by setting GPR9's bit 0 to 1 on my boards).

- Setup 2 regions

       * Region 0 - Base 0x1, size 2GB, Permission: Secure Read/Write permission

       * Region 1 - Base 0x80800000,, size 8MB, Permission : Secure Read/Write

Note: Above Region 1 is load address of Kernel OS image, just to test TZASC functionality I used this region and gave Secure Read/Write access

With the above configuration I booted the board, but system reads and loads Kernel OS into that address location(0x80800000) without throwing any error.

Can you please confirm the steps I did is proper ?

Read some where in community that TZASC registers can be configured only in Secure state and not in Non-Secure state.

Is that the reason my configuration is not working ?.

How Can I confirm the bootloader running from OCRAM is in Secure State.

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