Union PdEntry 

#[repr(C)]
pub union PdEntry {
    bits: u64,
    entry: Pde,
    leaf_2m: Pde2M,
}

L2 PDE union — overlays non-leaf Pde and leaf Pde2M on the same 64-bit storage.

Prefer PdEntry::view for safe typed access. These check the PS bit and hand you the correct variant.

Fields

bits: u64

Raw 64-bit storage of the entry.

entry: Pde

Non-leaf form: next-level Page Table (PS=0).

leaf_2m: Pde2M

Leaf form: 2 MiB mapping (PS=1).

Implementations

impl PdEntry

pub const fn new() -> Self

pub const fn new_entry(entry: Pde) -> Self

pub const fn new_leaf(leaf: Pde2M) -> Self

pub const fn present(self) -> bool

pub const fn from_bits(bits: u64) -> Self

Construct union from raw bits (no validation).

pub const fn into_bits(self) -> u64

Extract raw bits back from the union.

pub const fn view(self) -> L2View

Typed read-only view chosen by the PS bit.

• If PS=1 → L2View::Leaf2M
• If PS=0 → L2View::Entry

pub const fn zero() -> Self

Create a zero (non-present) entry.

pub const fn kind(self) -> Option<PdEntryKind>

Decode the entry into its semantic kind, or None if not present.

• When PS=1, returns PdEntryKind::Leaf2MiB with a 2 MiB page base.
• When PS=0, returns PdEntryKind::NextPageTable with a PT base.

pub const fn present_next_with( leaf_flags: VirtualMemoryPageBits, page: PhysicalPage<Size4K>, ) -> Self

Create a non-leaf PDE that points to a Page Table (PS=0).

Sets present=1, forces PS=0, and writes the PT base address. The PT base must be 4 KiB-aligned.

pub const fn present_leaf_with( leaf_flags: VirtualMemoryPageBits, page: PhysicalPage<Size2M>, ) -> Self

Create a new, present PdEntry with the specified flags, at the specified page.

Trait Implementations

impl Clone for PdEntry

fn clone(&self) -> PdEntry

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Default for PdEntry

fn default() -> Self

Returns the “default value” for a type.

impl From<Pde> for PdEntry

fn from(e: Pde) -> Self

Converts to this type from the input type.

impl From<Pde2M> for PdEntry

fn from(e: Pde2M) -> Self

Converts to this type from the input type.

impl Copy for PdEntry