topic Re: TZASC Configuration on i.MX8MP in i.MX Processors

TZASC Configuration on i.MX8MP

Na-veen — Thu, 03 Feb 2022 15:41:18 GMT

Hi,

As per security reference manual found that TZASC can be enabled by blowing the TZASC_ENABLE fuse. After enabling the TZASC how do we configure the peripherals?

Thanks

Re: TZASC Configuration on i.MX8MP

b36401 — Tue, 08 Feb 2022 02:55:30 GMT

TZASC supports 16 independent address regions. Access controls are independently programmable for each address region.
For complete details on TZASC functionality and the programming model you can refer to the Arm document
"CoreLink TrustZone Address Space Controller TZC-380 Technical Reference Manual"
which is available at http://infocenter.arm.com/ site.

Re: TZASC Configuration on i.MX8MP

Na-veen — Wed, 09 Feb 2022 10:25:58 GMT

Thank you @b36401 for your response.

I started working on the TZASC and I am trying to find the implementation document on ARM website but I couldn't, as it is confidential document and mentioned we need licesense to download one.

I am currently using the nxp iMX8MP board and they mentioned it supports TZASC, so how do I get the document ? does nxp provides one?

ref: I cannot find the "Integration and Implementation Manual" (IIM) on developer.arm.com

Thanks

Re: TZASC Configuration on i.MX8MP

Na-veen — Thu, 24 Feb 2022 17:50:35 GMT

When I try to override the TZASC_EN bit, it's failing with access protect error.

=> fuse override 2 0 0x00000800
Overriding bank 2 word 0x00000000 with 0x00000800...
mxc_ocotp fuse_override(): Access protect error
ERROR

Any solutions.?