• How Can I jump from EL1 to EL0 in bare metal environment
    Hello, I am working with a port of FreeRTOS on Arm64 soc , which is running at EL1, my goal is to perform a function call that will execute in EL0, I have come to understand that the only way for...
  • Purpose of EL0 EL1 ..
    Hi all, ARMV8 has number of exception levels as EL0 , EL1, EL2, EL3 .. How this is managed and what is the exact use case of the same ?
  • EL1 behavior when MMU is off
    Hi, I am facing issues with EL1 Guest OS.  I have enabled EL2 stage 2 page tables and set up all the virtualization registers {HCR_EL2, VTCR_EL2 and VTTBR_EL2 etc.} I am mapping my Guest OS memory to...
  • How to do from Secure(EL3) to Non-secure Exception level transition in ARMV8-A ?
    Hi all i trying do transition from EL3 to EL2 exception ,but after ERET of EL3 mode it change the mode to EL2 , but as soon as when it will execute first instruction of EL2 , then It goes to Exception...
  • how to understand ARMv8 exception level1 secure/non-secure MMU?
    Hi Experts ,      ARMv8 MMU TTBRn_ELx registers are banked by exception level.      In "DDI0487A_b_armv8_arm.pdf" page 1640, the controlling register of secure EL1&0 stage1 is TTBR0_EL1      and Non-secure...