Question

What can be done for the fine grain protection of the processor?

(a) add extra description bit

(b) add error signal

(c) add wait stage

(d) remains unchanged

The question was asked in class test.

This intriguing question originated from Memory Management in section Memory Systems of Embedded Systems

Answer 1

Right answer is (a) add extra description bit

Explanation: The finer grain protection of memory management is achieved by the addition of extra description bit to an address to declare its status. The memory management unit can detect an error if the task attempts to access memory that has not been allocated to it or a certain kind of mismatch occurs.