• TZC-400 Memory Regions Question
    Hi experts, Based on the manual of TZC-400 , we could set up at most 8 regions with different security settings. However, I'm wondering, when a normal world(non-secure) application read or write a specific...
  • disable and remove fpu instructions
    Hello, I would like to disable the FPU on my ARM Cortex A9 CPU during the boot software execution. But I need to employ RSA authentication to guarantee the integrity of my image partitions. As I...
  • TZC-400 Region Secure Access Discussion
    Hi experts, I know for the TZC-400 each region has an attribute register which has two bits:  s_wr_en   and s_wr_en for controlling secure access. On the other hand, these control registers could be changed...
  • How to temporarily disable MMU in EL3?
    I am using Trusted Firmware provided by Linaro on Juno Board R1. Now I want to disable MMU in EL3 and do some custom jobs, and then enable MMU again. As I don't want to disturb other codes in EL3, I guess...
  • How to disable neon option at armv8-a
    Hello, First of all, thank you so much for all the kind and detailed answer.. I am running simulation using cortex-53 or cortex-72 model, but my model does not support the below dup instruction. ...