[jeshwanth]

MPU supports Linux? Can somebody explain how they are doing this without MMU? Is it a security issue or complex compared to MMU?

[aceperry]

They're calling the MPU: Microprocessor Unit, not a memory protection unit. The Cortex A7 has the MMU. BTW, there are some linux distros that are made to run on processors without mmu's. Look at uClinux and NOMMU Linux.