190 pub struct VirtAddr(usize);  struct
192 impl VirtAddr {  implementation
241 impl Add<VirtAddr> for VirtAddr {  implementation
245     fn add(self, rhs: VirtAddr) -> Self::Output {  in add()
250 impl Add<usize> for VirtAddr {  implementation
259 impl Sub<VirtAddr> for VirtAddr {  implementation
263     fn sub(self, rhs: VirtAddr) -> Self::Output {  in sub()
268 impl Sub<usize> for VirtAddr {  implementation
277 impl AddAssign<usize> for VirtAddr {  implementation
284 impl AddAssign<VirtAddr> for VirtAddr {  implementation
286     fn add_assign(&mut self, rhs: VirtAddr) {  in add_assign()  argument
291 impl SubAssign<usize> for VirtAddr {  implementation
298 impl SubAssign<VirtAddr> for VirtAddr {  implementation
300     fn sub_assign(&mut self, rhs: VirtAddr) {  in sub_assign()  argument
305 impl Debug for VirtAddr {  implementation
381     const USER_END_VADDR: VirtAddr;
383     const USER_BRK_START: VirtAddr;
385     const USER_STACK_START: VirtAddr;
393     unsafe fn read<T>(address: VirtAddr) -> T {  in read()
399     unsafe fn write<T>(address: VirtAddr, value: T) {  in write()  argument
404     unsafe fn write_bytes(address: VirtAddr, value: u8, count: usize) {  in write_bytes()  argument
409     unsafe fn invalidate_page(address: VirtAddr);  in invalidate_page()  argument
426     unsafe fn phys_2_virt(phys: PhysAddr) -> Option<VirtAddr> {  in phys_2_virt()  argument
428             return Some(VirtAddr::new(vaddr));  in phys_2_virt()
444     unsafe fn virt_2_phys(virt: VirtAddr) -> Option<PhysAddr> {  in virt_2_phys()
453     fn virt_is_valid(virt: VirtAddr) -> bool;  in virt_is_valid()
468     start: VirtAddr,
475     pub fn new(start: VirtAddr, size: usize) -> Self {  in new()  argument
481     pub fn start(&self) -> VirtAddr {  in start()  argument
487     pub fn end(&self) -> VirtAddr {  in end()  argument
494     pub fn between(start: VirtAddr, end: VirtAddr) -> Option<Self> {  in between()  argument
513     pub fn set_start(&mut self, start: VirtAddr) {  in set_start()  argument
573     pub fn rebase(self, vaddr: VirtAddr, new_base: &VirtRegion) -> Option<VirtAddr> {  in rebase()  argument
579         return Some(VirtAddr::new(new_start));  in rebase()
583     pub fn contains(&self, addr: VirtAddr) -> bool {  in contains()
614 pub fn verify_area(addr: VirtAddr, size: usize) -> Result<(), SystemError> {  in verify_area()  argument