Add comments in ch5

3 years ago · 4387d128d8
parent 5aee0ddfd3
commit 4387d128d8
1 changed files with 2 additions and 2 deletions
--- a/os/src/mm/memory_set.rs
+++ b/os/src/mm/memory_set.rs
@ -240,12 +240,12 @@ impl MemorySet {
        }
        memory_set
    }
-    ///Refresh TLB with `fence.vma`
+    ///Refresh TLB with `sfence.vma`
    pub fn activate(&self) {
        let satp = self.page_table.token();
        unsafe {
            satp::write(satp);
-            asm!("fence.vma");
+            asm!("sfence.vma");
        }
    }
    ///Translate throuth pagetable