• State Accepted Answer
  • +1 person also asked this people also asked this
  • Locked Locked
  • Replies 3 replies
  • Subscribers 350 subscribers
  • Views 4305 views
  • Users 0 members are here
2025 survey

We are running a survey to help us improve the experience for all of our members. If you see the survey appear, please take the time to tell us about your experience if you can.

Options
Related
How was your experience today?
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Cortex-R5 MPU: writing to Region Base Register randomly causes Abort Exception

Umar Ali

Hi all,

I am using MPU of Cortex-R5, in doing so when writing to Base Register, via standard CP15 access. (MCR p15, 0, Rd, c6, c1, 0) it randomly causes Prefetch Abort Exception, i.e. sometimes it works fine aswell. and IFSR shows PERMISSION type fault.

The regions' base address are aligned to their respective sizes.

So, what can be a possible reason for this behaviour ?

Thanks in advance.