Struct os::mm::MemorySet

pub struct MemorySet {
    page_table: PageTable,
    areas: Vec<MapArea>,
}

address space

Fields

page_table: PageTable

areas: Vec<MapArea>

Implementations

impl MemorySet

pub fn new_bare() -> Self

Create a new empty MemorySet.

pub fn token(&self) -> usize

Get the page table token

pub fn insert_framed_area( &mut self, start_va: VirtAddr, end_va: VirtAddr, permission: MapPermission )

Assume that no conflicts.

pub fn remove_area_with_start_vpn(&mut self, start_vpn: VirtPageNum)

remove a area

fn push(&mut self, map_area: MapArea, data: Option<&[u8]>)

Add a new MapArea into this MemorySet. Assuming that there are no conflicts in the virtual address space.

fn map_trampoline(&mut self)

Mention that trampoline is not collected by areas.

pub fn new_kernel() -> Self

Without kernel stacks.

pub fn from_elf(elf_data: &[u8]) -> (Self, usize, usize)

Include sections in elf and trampoline and TrapContext and user stack, also returns user_sp_base and entry point.

pub fn from_existed_user(user_space: &Self) -> Self

Create a new address space by copy code&data from a exited process’s address space.

pub fn activate(&self)

Change page table by writing satp CSR Register.

pub fn translate(&self, vpn: VirtPageNum) -> Option<PageTableEntry>

Translate a virtual page number to a page table entry

pub fn recycle_data_pages(&mut self)

Remove all MapArea

pub fn shrink_to(&mut self, start: VirtAddr, new_end: VirtAddr) -> bool

shrink the area to new_end

pub fn append_to(&mut self, start: VirtAddr, new_end: VirtAddr) -> bool

append the area to new_end