i am starting a new project concerning trustZone cortex-A ,and i am having a bit of hard time to understand the technicalities lets say i want to communicate directly with the SMC for some non-secure , secure world communications

how would i build this how would i debug the system and see the communication happening between these 2 worlds so i can debug and start understanding the system better using gem5 in ARM architecture

Thank you in Advance

i did a gem5.opt system for ARM architecture and started running trusted firmware-A using VExpress_GEM5_Foundation that is running firmware-A on EL3 following the steps from this link
https://community.arm.com/arm-research/b/articles/posts/running-trusted-firmware-a-on-gem5