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IMX6UL aips-1 access from non-secure

Question asked by michaelschell on Oct 27, 2015
Latest reply on Oct 28, 2015 by Norbel Navarro

I have begun working with the IMX6UL and am booting the board into u-boot and then into my application.  My application is initiated in secure supervisor mode and I am able to access the aips-1 memory and associated registers (specifically, the UART1 peripheral).  However, I quickly transition to non-secure svc mode at which time I immediately lose access to the aips-1 memory and the UART1 peripheral.  Im assuming this might have something to do with the trustzone address space controller or the configuration of the AIPS-1 itself but am not sure.  Any ideas on this subject?  Why do I lose access to the AIPS-1 registers upon switching to non-secure mode?

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