Struct PDEntry

#[repr(transparent)]
pub struct PDEntry(pub u64);

A PD Entry consists of an address and a bunch of flags.

Tuple Fields

0: u64

Implementations

impl PDEntry

pub fn new(pt: PAddr, flags: PDFlags) -> PDEntry

Creates a new PDEntry.

Arguments

• pt - The physical address of the page table.
• flags- Additional flags for the entry.

pub fn address(self) -> PAddr

Retrieves the physical address in this entry.

pub fn flags(self) -> PDFlags

Returns the flags corresponding to this entry.

pub fn is_present(self) -> bool

Present; must be 1 to map a 2-MByte page or reference a page table.

pub fn is_writeable(self) -> bool

Read/write; if 0, writes may not be allowed to the 2-MByte region controlled by this entry

pub fn is_user_mode_allowed(self) -> bool

User/supervisor; user-mode accesses are not allowed to the 2-MByte region controlled by this entry.

pub fn is_page_write_through(self) -> bool

Page-level write-through.

pub fn is_page_level_cache_disabled(self) -> bool

Page-level cache disable.

pub fn is_accessed(self) -> bool

Accessed; if PS set indicates whether software has accessed the 2-MByte page else indicates whether this entry has been used for linear-address translation.

pub fn is_dirty(self) -> bool

Dirty; if PS set indicates whether software has written to the 2-MByte page referenced by this entry else ignored.

pub fn is_page(self) -> bool

Page size; if set this entry maps a 2-MByte page; otherwise, this entry references a page directory.

pub fn is_global(self) -> bool

Global; if PS && CR4.PGE = 1, determines whether the translation is global; ignored otherwise if not PS this is ignored.

pub fn is_pat(self) -> bool

Indirectly determines the memory type used to access the 2-MByte page referenced by this entry. if not PS this is ignored.

pub fn is_instruction_fetching_disabled(self) -> bool

If IA32_EFER.NXE = 1, execute-disable. If 1, instruction fetches are not allowed from the 2-Mbyte region.

Trait Implementations

impl Clone for PDEntry

fn clone(&self) -> PDEntry

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for PDEntry

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

Formats the value using the given formatter.

impl Copy for PDEntry