Struct cortexm::mpu::MPU

pub struct MPU<const NUM_REGIONS: usize, const MIN_REGION_SIZE: usize> { /* private fields */ }

State related to the real physical MPU.

There should only be one instantiation of this object as it represents real hardware.

Implementations

impl<const NUM_REGIONS: usize, const MIN_REGION_SIZE: usize> MPU<NUM_REGIONS, MIN_REGION_SIZE>

pub const unsafe fn new() -> Self

pub unsafe fn clear_mpu(&self)

Trait Implementations

impl<const NUM_REGIONS: usize, const MIN_REGION_SIZE: usize> MPU for MPU<NUM_REGIONS, MIN_REGION_SIZE>

type MpuConfig = CortexMConfig<NUM_REGIONS>

MPU-specific state that defines a particular configuration for the MPU. That is, this should contain all of the required state such that the implementation can be passed an object of this type and it should be able to correctly and entirely configure the MPU.

fn enable_app_mpu(&self)

Enables the MPU for userspace apps.

fn disable_app_mpu(&self)

Disables the MPU for userspace apps.

fn number_total_regions(&self) -> usize

Returns the maximum number of regions supported by the MPU.

fn new_config(&self) -> Option<Self::MpuConfig>

Creates a new empty MPU configuration.

fn reset_config(&self, config: &mut Self::MpuConfig)

Resets an MPU configuration.

fn allocate_region( &self, unallocated_memory_start: *const u8, unallocated_memory_size: usize, min_region_size: usize, permissions: Permissions, config: &mut Self::MpuConfig, ) -> Option<Region>

Allocates a new MPU region.

fn remove_memory_region( &self, region: Region, config: &mut Self::MpuConfig, ) -> Result<(), ()>

Removes an MPU region within app-owned memory.

fn allocate_app_memory_region( &self, unallocated_memory_start: *const u8, unallocated_memory_size: usize, min_memory_size: usize, initial_app_memory_size: usize, initial_kernel_memory_size: usize, permissions: Permissions, config: &mut Self::MpuConfig, ) -> Option<(*const u8, usize)>

Chooses the location for a process’s memory, and allocates an MPU region covering the app-owned part.

fn update_app_memory_region( &self, app_memory_break: *const u8, kernel_memory_break: *const u8, permissions: Permissions, config: &mut Self::MpuConfig, ) -> Result<(), ()>

Updates the MPU region for app-owned memory.

fn configure_mpu(&self, config: &Self::MpuConfig)

Configures the MPU with the provided region configuration.