Trait PageTableEntry 

pub trait PageTableEntry:
    Sized
    + Debug
    + Sync
    + Send
    + Clone
    + Copy
    + 'static {
    type PteConfig: Copy;

    // Required methods
    fn new_page(paddr: PhysAddr, config: Self::PteConfig, is_huge: bool) -> Self;
    fn new_table(paddr: PhysAddr) -> Self;
    fn paddr(&self, is_dir: bool) -> PhysAddr;
    fn config(&self, is_dir: bool) -> Self::PteConfig;
    fn present(&self) -> bool;
    fn huge(&self, is_dir: bool) -> bool;
    fn unused(&self) -> bool;
    fn clear(&mut self);
}

Required Associated Types

type PteConfig: Copy

Configuration understood by this concrete PTE format.

Required Methods

fn new_page(paddr: PhysAddr, config: Self::PteConfig, is_huge: bool) -> Self

Creates a leaf or block entry.

fn new_table(paddr: PhysAddr) -> Self

Creates an entry that points to a child page-table frame.

fn paddr(&self, is_dir: bool) -> PhysAddr

Returns the physical address encoded by this entry.

is_dir lets formats with level-dependent layouts decode the address without exposing those layout rules to the generic walker.

fn config(&self, is_dir: bool) -> Self::PteConfig

Decodes the owner-defined leaf configuration.

fn present(&self) -> bool

Returns whether this entry participates in address translation.

Implementations must recognize both leaf mappings and child-table entries.

fn huge(&self, is_dir: bool) -> bool

Returns whether this entry is a block mapping at the current level.

CPU page-table formats should preserve this structural answer for a retained non-present block. Formats that encode an empty-permission block as zero may return false; typed split then reports NotMapped.

fn unused(&self) -> bool

Returns whether this entry contains no descriptor state at all.

This is distinct from Self::present: a non-present leaf may retain its physical address so that a later protection change can activate it.

fn clear(&mut self)

Clears all descriptor state from this entry.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl PageTableEntry for EptEntry

type PteConfig = EptFlags

fn new_page(paddr: PhysAddr, flags: EptFlags, is_huge: bool) -> EptEntry

fn new_table(paddr: PhysAddr) -> EptEntry

fn paddr(&self, _is_dir: bool) -> PhysAddr

fn config(&self, _is_dir: bool) -> EptFlags

fn present(&self) -> bool

fn huge(&self, is_dir: bool) -> bool

fn unused(&self) -> bool

fn clear(&mut self)

Implementors

impl PageTableEntry for Entry

type PteConfig = PteConfig