METHOD AND APPARATUS FOR PROVIDING MEMORY PROTECTION

摘要

A method for providing memory protection within a signal processing system comprises receiving a memory access signal comprising at least one instruction memory region (IMR) indication. The IMR indication comprises an indication of a region of memory from which a memory access instruction was fetched, execution of said memory access instruction having resulted in the generation of the received memory access signal. The method further comprises comparing the IMR indication for the received memory access signal to at least one permitted memory region (PMR) indication for a target address of the received memory access signal, and determining whether a memory access being attempted by the memory access signal is permitted based at least partly on the comparison of the IMR indication for the received memory access signal to the PMR indication for the target address of the received memory access signal.

主权项

1. A memory protection unit, arranged to:
receive a memory access signal comprising at least one instruction memory region, IMR, indication, the at least one IMR indication comprising an indication of a region of memory from which a memory access instruction was fetched, execution of said memory access instruction having resulted in the generation of the received memory access signal; compare the at least one IMR indication for the received memory access signal to at least one permitted memory region, PMR, indication for a target address of the received memory access signal; and determine whether a memory access being attempted by the memory access signal is permitted based at least partly on the comparison of the at least one IMR indication for the received memory access signal to the at least one PMR indication for the target address of the received memory access signal.