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Split translate into translate_page and rest

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Philipp Oppermann
2015-12-04 11:50:42 +01:00
parent 44fd5f682d
commit 6c5b932fbc
1 changed files with 4 additions and 2 deletions
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6
src/memory/paging/translate.rs
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@@ -4,9 +4,12 @@ use super::entry::{PRESENT, HUGE_PAGE};
use memory::Frame;
pub fn translate(virtual_address: VirtualAddress) -> Option<PhysicalAddress> {
let page = Page::containing_address(virtual_address);
let offset = virtual_address % PAGE_SIZE;
translate_page(Page::containing_address(virtual_address))
.map(|frame| frame.number * PAGE_SIZE + offset)
}
fn translate_page(page: Page) -> Option<Frame> {
let p4 = unsafe { &*P4 };
let huge_page = || {
@@ -38,5 +41,4 @@ pub fn translate(virtual_address: VirtualAddress) -> Option<PhysicalAddress> {
.and_then(|p2| p2.next_table(page.p2_index()))
.map(|p1| p1[page.p1_index()].pointed_frame())
.or_else(huge_page)
.map(|frame| frame.number * PAGE_SIZE + offset)
}