Struct aarch64_paging::paging::Descriptor

#[repr(C)]
pub struct Descriptor(/* private fields */);

An entry in a page table.

A descriptor may be:

• Invalid, i.e. the virtual address range is unmapped
• A page mapping, if it is in the lowest level page table.
• A block mapping, if it is not in the lowest level page table.
• A pointer to a lower level pagetable, if it is not in the lowest level page table.

Implementations

impl Descriptor

pub fn flags(self) -> Option<Attributes>

Returns the flags of this page table entry, or None if its state does not contain a valid set of flags.

pub fn modify_flags(&mut self, set: Attributes, clear: Attributes)

Modifies the page table entry by setting or clearing its flags. Panics when attempting to convert a table descriptor into a block/page descriptor or vice versa - this is not supported via this API.

pub fn is_valid(self) -> bool

Returns true if Attributes::VALID is set on this entry, e.g. if the entry is mapped.

pub fn is_table_or_page(self) -> bool

Returns true if this is a valid entry pointing to a next level translation table or a page.

Trait Implementations

impl Clone for Descriptor

fn clone(&self) -> Descriptor

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Descriptor

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

Formats the value using the given formatter.

impl PartialEq for Descriptor

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for Descriptor

impl Eq for Descriptor

impl StructuralEq for Descriptor

impl StructuralPartialEq for Descriptor