• Difference between Sub regions and Overlapping Regions in MPU
    Hi Experts, In the Memory Protection Unit, what is the difference between Sub regions and the Overlapping regions ? What is the typical use case of the MPU and how it helps in building a quality software...
  • Of exceptions and aborts..
    Note: This was originally posted on 21st January 2009 at http://forums.arm.com The ARM reference manual specifies sometimes MOV PC,R14 and sometimes SUBS PC,R14, #4 for returning from exceptions. But...
  • ARMv7-a MPU/PMSA - Unified Region (Base/Size) question
    Hello, I have been reading and searching for some time and have learned a lot about the MPU on an ARMv7-a. I am attempting to use the Unified Region Base/Size registers to both limit memory access,...
  • Data Abort Exception in A53
    Hello, I am working on Cortex-A53  and using Cortex-A53 DSM Model in my design. We are getting Data Abort exception on a read to ROM address and ESR_EL3 register showing its a DECERR External error. MMU...