Enum AccessPerms 

pub enum AccessPerms {
    NoAccess,
    ReadOnly,
    ReadWrite,
    PrivReadOnly,
    PrivReadWrite,
    PrivReadWriteUserReadOnly,
}

Describes the access permissions of a memory region

Access permission bits control read and write access to the corresponding memory region. Permissions are specified for priviledged accesses (PL1) and for user accesses (PL0). Accesses to a memory region without the required permissions generate a Permission fault.

Note that the execute-never (XN) attribute provides an additional permission check on memory regions, see Region::no_exec.

Variants

NoAccess

All accesses generate a Permission fault

• PL1: No access
• PL0: No access

ReadOnly

All write accesses generate Permission faults

• PL1: Read-only
• PL0: Read-only

ReadWrite

Full access

• PL1: Read/Write
• PL0: Read/Write

PrivReadOnly

PL1 read-only, all other accesses generate Permission faults

• PL1: Read-only
• PL0: No access

PrivReadWrite

All unprivileged accesses generate Permission faults

• PL1: Read/Write
• PL0: No access

PrivReadWriteUserReadOnly

User mode write accesses generate Permission faults

• PL1: Read/Write
• PL0: Read-only

Implementations

impl AccessPerms

pub const fn to_bits(&self) -> u3

Convert these access permissions to a 3-bit value we can write to RACR

Trait Implementations

impl Clone for AccessPerms

fn clone(&self) -> AccessPerms

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for AccessPerms

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for AccessPerms

impl PartialEq for AccessPerms

fn eq(&self, other: &AccessPerms) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for AccessPerms