Struct Mpu

pub struct Mpu(/* private fields */);

Wrapper around the Cortex-M0+ Memory Protection Unit (MPU).

Implementations

impl Mpu

pub const MIN_REGION_SIZE: Size = Size::S256B

The smallest supported region size.

pub const REGION_COUNT: u8 = 8u8

Number of supported memory regions.

pub unsafe fn new(raw: MPU) -> Self

Creates a new MPU wrapper, taking ownership of the MPU peripheral.

Safety

This function is safe to call if the processor is a Cortex-M0+ and has an MPU.

pub fn into_inner(self) -> MPU

Consumes self and returns the raw MPU peripheral.

pub fn configure_unprivileged(&mut self, regions: &ArrayVec<[Region; 8]>)

Configures the MPU to restrict access to software running in unprivileged mode.

Any violation of the MPU settings will cause a HardFault exception. The Cortex-M0+ does not have a dedicated memory management exception.

Unprivileged code will only be allowed to access memory inside one of the given regions.

Code running in privileged mode will not be restricted by the MPU, except that regions that have executable set to false will be marked as Never eX*excute* (NX), which is enforced even for privileged code.