From a42b7d5dbb8b88aa1fb4dc508600a272c494e3f5 Mon Sep 17 00:00:00 2001 From: Frans Kaashoek Date: Tue, 2 Oct 2018 08:12:01 -0400 Subject: Simplify freeing page table --- mmu.h | 2 -- 1 file changed, 2 deletions(-) (limited to 'mmu.h') diff --git a/mmu.h b/mmu.h index df11806..544de31 100644 --- a/mmu.h +++ b/mmu.h @@ -93,7 +93,6 @@ struct segdesc { // Page directory and page table constants. #define NPDENTRIES 512 // # directory entries per page directory -#define NPTENTRIES 512 // # PTEs per page table #define PGSIZE 4096 // bytes mapped by a page #define PGSHIFT 12 // offset of PTX in a linear address #define PDXSHIFT 21 // offset of PDX in a linear address @@ -101,7 +100,6 @@ struct segdesc { #define PXMASK 0x1FF #define PXSHIFT(n) (PGSHIFT+(9*(n))) #define PDX(va) (((uint64)(va) >> PDXSHIFT) & PXMASK) -#define PTX(va) (((uint64)(va) >> PGSHIFT) & PXMASK) #define PX(n, va) ((((uint64) (va)) >> PXSHIFT(n)) & PXMASK) #define L_PML4 3 -- cgit v1.2.3