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

Test map_to function

Browse Source
This commit is contained in:
Philipp Oppermann
2015-12-09 13:45:39 +01:00
parent 5b4e457439
commit cf5ea7664e
2 changed files with 39 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
src/memory/paging/mod.rs
View File

@@ -16,7 +16,7 @@ pub struct Page {
}
impl Page {
fn containing_address(address: VirtualAddress) -> Page {
pub fn containing_address(address: VirtualAddress) -> Page {
assert!(address < 0x0000_8000_0000_0000 || address >= 0xffff_8000_0000_0000,
"invalid address: 0x{:x}",
address);
@@ -147,12 +147,24 @@ impl RecursivePageTable {
pub fn test_paging<A>(allocator: &mut A)
where A: FrameAllocator
{
let page_table = unsafe { RecursivePageTable::new() };
let mut page_table = unsafe { RecursivePageTable::new() };
// test translate
println!("Some = {:?}", page_table.translate(0));
println!("Some = {:?}", page_table.translate(4096)); // second P1 entry
println!("Some = {:?}", page_table.translate(512 * 4096)); // second P2 entry
println!("Some = {:?}", page_table.translate(300 * 512 * 4096)); // 300th P2 entry
println!("None = {:?}", page_table.translate(512 * 512 * 4096)); // second P3 entry
println!("Some = {:?}", page_table.translate(512 * 512 * 4096 - 1)); // last mapped byte
// test map_to
let addr = 42 * 512 * 512 * 4096; // 42th P3 entry
let page = Page::containing_address(addr);
let frame = allocator.allocate_frame().expect("no more frames");
println!("None = {:?}, map to {:?}",
page_table.translate(addr),
frame);
page_table.map_to(page, frame, EntryFlags::empty(), allocator);
println!("Some = {:?}", page_table.translate(addr));
println!("next free frame: {:?}", allocator.allocate_frame());
}