michaelkuc6/blog_os
1
0
Fork 0
mirror of https://github.com/phil-opp/blog_os.git synced 2025-12-16 22:37:49 +00:00
Code Issues Projects Releases Wiki Activity

Fix unmap function by flushing the TLB

Browse Source
This commit is contained in:
Philipp Oppermann
2017-04-13 19:43:52 +02:00
parent eb5c9afa51
commit 55e602dc61
1 changed files with 5 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
src/memory/paging/mod.rs
View File

@@ -138,6 +138,9 @@ impl ActivePageTable {
fn unmap<A>(&mut self, page: Page, allocator: &mut A) fn unmap<A>(&mut self, page: Page, allocator: &mut A)
where A: FrameAllocator where A: FrameAllocator
{ {
use x86_64::instructions::tlb;
use x86_64::VirtualAddress;
assert!(self.translate(page.start_address()).is_some()); assert!(self.translate(page.start_address()).is_some());
let p1 = self.p4_mut() let p1 = self.p4_mut()
@@ -147,12 +150,12 @@ impl ActivePageTable {
.expect("mapping code does not support huge pages"); .expect("mapping code does not support huge pages");
let frame = p1[page.p1_index()].pointed_frame().unwrap(); let frame = p1[page.p1_index()].pointed_frame().unwrap();
p1[page.p1_index()].set_unused(); p1[page.p1_index()].set_unused();
tlb::flush(VirtualAddress(page.start_address()));
// TODO free p(1,2,3) table if empty // TODO free p(1,2,3) table if empty
allocator.deallocate_frame(frame); //allocator.deallocate_frame(frame);
} }
} }
pub fn test_paging<A>(allocator: &mut A) pub fn test_paging<A>(allocator: &mut A)
where A: FrameAllocator where A: FrameAllocator
{ {