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35 lines
928 B
35 lines
928 B
use super::*;
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#[derive(Debug, Clone)]
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pub struct ByFrame<T: FrameAllocator> {
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allocator: T,
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}
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impl<T: FrameAllocator> MemoryHandler for ByFrame<T> {
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fn box_clone(&self) -> Box<MemoryHandler> {
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Box::new(self.clone())
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}
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fn map(&self, pt: &mut PageTable, addr: VirtAddr, attr: &MemoryAttr) {
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let target = self.allocator.alloc().expect("failed to allocate frame");
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let entry = pt.map(addr, target);
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entry.set_present(true);
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attr.apply(entry);
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}
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fn unmap(&self, pt: &mut PageTable, addr: VirtAddr) {
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let target = pt.get_entry(addr).expect("fail to get entry").target();
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self.allocator.dealloc(target);
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pt.unmap(addr);
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}
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fn handle_page_fault(&self, _pt: &mut PageTable, _addr: VirtAddr) -> bool {
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false
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}
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}
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impl<T: FrameAllocator> ByFrame<T> {
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pub fn new(allocator: T) -> Self {
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ByFrame { allocator }
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}
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} |