Struct x86_64::registers::control::Cr3

pub struct Cr3;

Contains the physical address of the highest-level page table.

Implementations

impl Cr3

pub fn read() -> (PhysFrame, Cr3Flags)

Available on crate feature instructions only.

Read the current P4 table address from the CR3 register.

pub fn read_raw() -> (PhysFrame, u16)

Available on crate feature instructions only.

Read the current P4 table address from the CR3 register

pub fn read_pcid() -> (PhysFrame, Pcid)

Available on crate feature instructions only.

Read the current P4 table address from the CR3 register along with PCID. The correct functioning of this requires CR4.PCIDE = 1. See Cr4Flags::PCID

pub unsafe fn write(frame: PhysFrame, flags: Cr3Flags)

Available on crate feature instructions only.

Write a new P4 table address into the CR3 register.

Safety

Changing the level 4 page table is unsafe, because it’s possible to violate memory safety by changing the page mapping.

pub unsafe fn write_pcid(frame: PhysFrame, pcid: Pcid)

Available on crate feature instructions only.

Write a new P4 table address into the CR3 register.

Safety

Changing the level 4 page table is unsafe, because it’s possible to violate memory safety by changing the page mapping. Cr4Flags::PCID must be set before calling this method.

pub unsafe fn write_pcid_no_flush(frame: PhysFrame, pcid: Pcid)

Available on crate feature instructions only.

Write a new P4 table address into the CR3 register without flushing existing TLB entries for the PCID.

Safety

Changing the level 4 page table is unsafe, because it’s possible to violate memory safety by changing the page mapping. Cr4Flags::PCID must be set before calling this method.

pub unsafe fn write_raw(frame: PhysFrame, val: u16)

Available on crate feature instructions only.

Write a new P4 table address into the CR3 register.

Safety

Changing the level 4 page table is unsafe, because it’s possible to violate memory safety by changing the page mapping.

Trait Implementations

impl Debug for Cr3

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

Formats the value using the given formatter.