Dear users,
The MPU related forums and related SW solutions are transitioning to the Microchip Forum interface (including Linux):
https://www.microchip.com/forums/f540.aspx
No user migration is planned so you'll have to re-create a profile to benefit from these new forums.
EDIT
Note as well that the at91.com website and these the MPU-related Atmel community forums will be put in read-only mode in a few months.
EDIT2
MPU stands for Microprocessors, chips with ARM Application cores of the type ARM9 or Cortex-A, SAM9 or SAMA5 families.
Best regards,
Nicolas