Control register for DMA MPU. Accessible only from a Privileged context.
| P | Determine whether an address not covered by an active MPU region is Privileged (1) or Unprivileged (0) |
| S | Determine whether an address not covered by an active MPU region is Secure (1) or Non-secure (0) |
| NS_HIDE_ADDR | By default, when a region’s S bit is clear, Non-secure-Privileged reads can see the region’s base address and limit address. Set this bit to make the addresses appear as 0 to Non-secure reads, even when the region is Non-secure, to avoid leaking information about the processor SAU map. |