• 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...
  • switching from el3 to el2,, some part of ddr read as deadbeef
    Dear Community, In my use case, I start with EL3 mode and switch back to EL2 mode but I am seeing different kind of issues with this switching , My code is like 1. u-boot in EL3 (This enable caches...
  • Accessing coresight debug and trace memory region in EL3 leads to stuck.
    The manual tells that I can use ETM in both self-host debugging and external debugging. With DStream and DS-5, the ETM works well. However, i find that i can not modify the tracing registers in DS-5,...
  • How to map a PA into EL3's VA space?
    By checking the data, I know that all physical memory can be accessed in el3 privilege mode. Now I have known the physical address of a block of allocated memory area in the kernel, and have passed...
  • Can I print information from EL3 / ARM-TF with Juno board?
    Hi there, After setting up the board followed by the instruction , I connect both UART ports with my computer. For my board one port shows normal world output while other one shows OP-TEE output. ...