Function page_insert

pub fn page_insert(
    pgdir: *mut Pde,
    va: usize,
    asid: u32,
    perm: u32,
    page: *mut PageNode,
) -> Result<(), KError>

Map the physical page to the virtual address va. The permission bits will be set to perm | PTE_C_CACHEABLE | PTE_V.

If there is already a page mapped at va, page_remove will be invoked to unmap it.