282 pub struct VirtAddr(usize);  struct
284 impl VirtAddr {  impl
329 impl Add<VirtAddr> for VirtAddr {  implementation
333     fn add(self, rhs: VirtAddr) -> Self::Output {  in add()
338 impl Add<usize> for VirtAddr {  implementation
347 impl Sub<VirtAddr> for VirtAddr {  implementation
351     fn sub(self, rhs: VirtAddr) -> Self::Output {  in sub()
356 impl Sub<usize> for VirtAddr {  implementation
365 impl AddAssign<usize> for VirtAddr {  implementation
372 impl AddAssign<VirtAddr> for VirtAddr {  implementation
374     fn add_assign(&mut self, rhs: VirtAddr) {  in add_assign()  argument
379 impl SubAssign<usize> for VirtAddr {  implementation
386 impl SubAssign<VirtAddr> for VirtAddr {  implementation
388     fn sub_assign(&mut self, rhs: VirtAddr) {  in sub_assign()  argument
393 impl Debug for VirtAddr {  implementation
524     const USER_END_VADDR: VirtAddr;
526     const USER_BRK_START: VirtAddr;
528     const USER_STACK_START: VirtAddr;
531     const FIXMAP_START_VADDR: VirtAddr;
535     const FIXMAP_END_VADDR: VirtAddr =
536         VirtAddr::new(Self::FIXMAP_START_VADDR.data() + Self::FIXMAP_SIZE);
539     const MMIO_BASE: VirtAddr;
543     const MMIO_TOP: VirtAddr = VirtAddr::new(Self::MMIO_BASE.data() + Self::MMIO_SIZE);
554     unsafe fn read<T>(address: VirtAddr) -> T {  in read()
560     unsafe fn write<T>(address: VirtAddr, value: T) {  in write()  argument
565     unsafe fn write_bytes(address: VirtAddr, value: u8, count: usize) {  in write_bytes()  argument
570     unsafe fn invalidate_page(address: VirtAddr);  in invalidate_page()  argument
587     unsafe fn phys_2_virt(phys: PhysAddr) -> Option<VirtAddr> {  in phys_2_virt()  argument
589             return Some(VirtAddr::new(vaddr));  in phys_2_virt()
605     unsafe fn virt_2_phys(virt: VirtAddr) -> Option<PhysAddr> {  in virt_2_phys()
614     fn virt_is_valid(virt: VirtAddr) -> bool;  in virt_is_valid()
706     start: VirtAddr,
713     pub fn new(start: VirtAddr, size: usize) -> Self {  in new()  argument
719     pub fn start(&self) -> VirtAddr {  in start()  argument
725     pub fn end(&self) -> VirtAddr {  in end()  argument
732     pub fn between(start: VirtAddr, end: VirtAddr) -> Option<Self> {  in between()  argument
751     pub fn set_start(&mut self, start: VirtAddr) {  in set_start()  argument
811     pub fn rebase(self, vaddr: VirtAddr, new_base: &VirtRegion) -> Option<VirtAddr> {  in rebase()  argument
817         return Some(VirtAddr::new(new_start));  in rebase()
821     pub fn contains(&self, addr: VirtAddr) -> bool {  in contains()
852 pub fn verify_area(addr: VirtAddr, size: usize) -> Result<(), SystemError> {  in verify_area()  argument