Struct Descriptor 

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 const EMPTY: Self

An empty (i.e. 0) descriptor.

pub fn output_address(&self) -> PhysicalAddress

Returns the physical address that this descriptor refers to if it is valid.

Depending on the flags this could be the address of a subtable, a mapping, or (if it is not a valid mapping) entirely arbitrary.

pub fn flags(&self) -> Attributes

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

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 Debug for Descriptor

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

Formats the value using the given formatter.