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Clone grants

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This commit is contained in:
Jeremy Soller 2016-09-20 22:14:08 -06:00
parent 1a3a24c8bb
commit 5757f3436e
4 changed files with 75 additions and 56 deletions
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86
kernel/context/memory.rs
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@ -16,7 +16,31 @@ pub struct Grant {
}
impl Grant {
pub fn new(from: VirtualAddress, to: VirtualAddress, size: usize, flags: EntryFlags, new_table: &mut InactivePageTable, temporary_page: &mut TemporaryPage) -> Grant {
pub fn physmap(from: PhysicalAddress, to: VirtualAddress, size: usize, flags: EntryFlags) -> Grant {
let mut active_table = unsafe { ActivePageTable::new() };
let mut flush_all = false;
let start_page = Page::containing_address(to);
let end_page = Page::containing_address(VirtualAddress::new(to.get() + size - 1));
for page in Page::range_inclusive(start_page, end_page) {
let frame = Frame::containing_address(PhysicalAddress::new(page.start_address().get() - to.get() + from.get()));
active_table.map_to(page, frame, flags);
flush_all = true;
}
if flush_all {
active_table.flush_all();
}
Grant {
start: to,
size: size,
flags: flags
}
}
pub fn map_inactive(from: VirtualAddress, to: VirtualAddress, size: usize, flags: EntryFlags, new_table: &mut InactivePageTable, temporary_page: &mut TemporaryPage) -> Grant {
let mut active_table = unsafe { ActivePageTable::new() };
let mut frames = VecDeque::new();
@ -44,43 +68,19 @@ impl Grant {
}
}
pub fn destroy(self, new_table: &mut InactivePageTable, temporary_page: &mut TemporaryPage) {
let mut active_table = unsafe { ActivePageTable::new() };
active_table.with(new_table, temporary_page, |mapper| {
let start_page = Page::containing_address(self.start);
let end_page = Page::containing_address(VirtualAddress::new(self.start.get() + self.size - 1));
for page in Page::range_inclusive(start_page, end_page) {
mapper.unmap_return(page);
}
});
pub fn start_address(&self) -> VirtualAddress {
self.start
}
pub fn physmap(from: PhysicalAddress, to: VirtualAddress, size: usize, flags: EntryFlags) -> Grant {
let mut active_table = unsafe { ActivePageTable::new() };
let mut flush_all = false;
let start_page = Page::containing_address(to);
let end_page = Page::containing_address(VirtualAddress::new(to.get() + size - 1));
for page in Page::range_inclusive(start_page, end_page) {
let frame = Frame::containing_address(PhysicalAddress::new(page.start_address().get() - to.get() + from.get()));
active_table.map_to(page, frame, flags);
flush_all = true;
}
if flush_all {
active_table.flush_all();
}
Grant {
start: to,
size: size,
flags: flags
}
pub fn size(&self) -> usize {
self.size
}
pub fn physunmap(self) {
pub fn flags(&self) -> EntryFlags {
self.flags
}
pub fn unmap(self) {
let mut active_table = unsafe { ActivePageTable::new() };
let mut flush_all = false;
@ -97,16 +97,16 @@ impl Grant {
}
}
pub fn start_address(&self) -> VirtualAddress {
self.start
}
pub fn unmap_inactive(self, new_table: &mut InactivePageTable, temporary_page: &mut TemporaryPage) {
let mut active_table = unsafe { ActivePageTable::new() };
pub fn size(&self) -> usize {
self.size
}
pub fn flags(&self) -> EntryFlags {
self.flags
active_table.with(new_table, temporary_page, |mapper| {
let start_page = Page::containing_address(self.start);
let end_page = Page::containing_address(VirtualAddress::new(self.start.get() + self.size - 1));
for page in Page::range_inclusive(start_page, end_page) {
mapper.unmap_return(page);
}
});
}
}