Union PdptEntry 

#[repr(C)]
pub union PdptEntry {
    bits: u64,
    entry: Pdpte,
    leaf_1g: Pdpte1G,
}

L3 PDPTE union — overlays non-leaf Pdpte and leaf Pdpte1G on the same 64-bit storage.

Use PdptEntry::view to obtain a typed reference. These methods inspect the PS bit to decide which variant is active and return a safe borrowed view.

Storing/retrieving raw bits is possible via from_bits/into_bits.

Fields

bits: u64

Raw 64-bit storage of the entry.

entry: Pdpte

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

leaf_1g: Pdpte1G

Leaf form: 1 GiB mapping (PS=1).

Implementations

impl PdptEntry

pub const fn new() -> Self

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

pub const fn new_leaf(leaf: Pdpte1G) -> 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) -> L3View

Typed read-only view chosen by the PS bit.

• If PS=1 → L3View::Leaf1G
• If PS=0 → L3View::Entry

This function is safe: it returns a view consistent with the PS bit.

pub const fn zero() -> Self

Create a zero (non-present) entry.

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

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

• When PS=1, returns PdptEntryKind::Leaf1GiB with a 1 GiB page base.
• When PS=0, returns PdptEntryKind::NextPageDirectory with a PD base.

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

Create a non-leaf PDPTE that points to a Page Directory (PS=0).

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

pub const fn present_leaf_with( flags: VirtualMemoryPageBits, page: PhysicalPage<Size1G>, ) -> Self

Create a 1 GiB leaf PDPTE (PS=1).

Sets present=1, forces PS=1, and writes the large-page base address. The page base must be 1 GiB-aligned.

Trait Implementations

impl Clone for PdptEntry

fn clone(&self) -> PdptEntry

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Default for PdptEntry

fn default() -> Self

Returns the “default value” for a type.

impl From<Pdpte> for PdptEntry

fn from(e: Pdpte) -> Self

Converts to this type from the input type.

impl From<Pdpte1G> for PdptEntry

fn from(e: Pdpte1G) -> Self

Converts to this type from the input type.

impl Copy for PdptEntry