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Fetching buffer arguments from user space.

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This commit is contained in:
Yifan Wu 2020-12-06 13:56:13 +08:00
parent d38b24a9cb
commit 9366099b28
20 changed files with 405 additions and 82 deletions
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4
os/src/mm/address.rs
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@ -71,6 +71,7 @@ impl VirtAddr {
pub fn floor(&self) -> VirtPageNum { VirtPageNum(self.0 / PAGE_SIZE) }
pub fn ceil(&self) -> VirtPageNum { VirtPageNum((self.0 + PAGE_SIZE - 1) / PAGE_SIZE) }
pub fn page_offset(&self) -> usize { self.0 & (PAGE_SIZE - 1) }
pub fn aligned(&self) -> bool { self.page_offset() == 0 }
}
impl From<VirtAddr> for VirtPageNum {
fn from(v: VirtAddr) -> Self {
@ -85,6 +86,7 @@ impl PhysAddr {
pub fn floor(&self) -> PhysPageNum { PhysPageNum(self.0 / PAGE_SIZE) }
pub fn ceil(&self) -> PhysPageNum { PhysPageNum((self.0 + PAGE_SIZE - 1) / PAGE_SIZE) }
pub fn page_offset(&self) -> usize { self.0 & (PAGE_SIZE - 1) }
pub fn aligned(&self) -> bool { self.page_offset() == 0 }
}
impl From<PhysAddr> for PhysPageNum {
fn from(v: PhysAddr) -> Self {
@ -150,6 +152,8 @@ impl<T> SimpleRange<T> where
assert!(start <= end, "start {:?} > end {:?}!", start, end);
Self { l: start, r: end }
}
pub fn get_start(&self) -> T { self.l }
pub fn get_end(&self) -> T { self.r }
}
impl<T> IntoIterator for SimpleRange<T> where
T: StepByOne + Copy + PartialEq + PartialOrd + Debug, {