Struct Vmm 

pub struct Vmm {
    pub plm4_ptr: *mut PageTable,
    pub hhdm_offset: u64,
}

Kernel page-table state used by all VMM operations.

Fields

plm4_ptr: *mut PageTable

Virtual address of the active PML4 (the table installed in CR3).

hhdm_offset: u64

Higher-Half Direct Map offset: add to any physical address to get its virtual address.

Implementations

impl Vmm

pub fn init(pmm: &Pmm, hhdm_offset: u64) -> Self

Initialize the VMM and install a kernel-owned PML4 into CR3.

Panics

Panics if the PMM cannot allocate the PML4 frame (out of memory).

pub unsafe fn map_page( &self, pmm: &Pmm, virt: VirtAddr, phys: PhysAddr, flags: PageTableFlags, )

Map one 4 KiB virtual page to a physical frame. PRESENT is forced on regardless of flags.

Safety

The caller must ensure virt is a valid kernel virtual address and phys is a valid, PMM-allocated frame.

Panics

Panics if the PMM runs out of frames when allocating an intermediate page table.

pub unsafe fn unmap_page(&self, virt: VirtAddr)

Unmap one 4 KiB virtual page and flush its TLB entry.

Safety

The caller must ensure virt was previously mapped and that no live code or data references the page after this call returns.

Panics

Panics if any level of the walk is not present (page was never mapped).

Trait Implementations

impl Send for Vmm

impl Sync for Vmm