Memory Addresses of Secure / Non Secure DDR Ram

Hello,

I'm trying to configure the portions of the DDR Ram to secure and nonsecure. It says in the TrustZone Architecture User Guide, that each bit in the TZ_DDR_RAM register corresponds to a 64MB section of ram that you can configure to secure and non secure. I was looking at the Zynq TRM on page 113 where it discusses the address map, and it's confusing. I was wondering what address range the RAM was, so if I set the very first bit in the register to 0, the first 64 MB section of RAM is secure, and I could check to see if this range is actually valid.

0 Former Member over 8 years ago

Hi,

We have not done any work with the TrustZone here.You might want to consider one of the Zynq OS or Hypervisors that implement the TrustZone features. Here are a couple of forum threads from the Xilinx Community forums and some links (you may have already seen) on the subject:

https://forums.xilinx.com/t5/Zynq-All-Programmable-SoC/Trustzone-on-Zynq/m-p/683703

http://www.xilinx.com/support/documentation/user_guides/ug1019-zynq-trustzone.pdf

https://forums.xilinx.com/t5/Zynq-All-Programmable-SoC/ARM-Trustzone/td-p/589428

https://forums.xilinx.com/t5/Embedded-Linux/TrustZone-Control-register-access-causing-system-crash/td-p/456376

https://community.arm.com/community/arm-partner-directory/partner-xilinx/blog/2014/05/20/secrets-of-the-arm-trustzone-in-the-zynq-all-programmable-soc

-Gary
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