diff options
Diffstat (limited to 'mmu.h')
| -rw-r--r-- | mmu.h | 6 |
1 files changed, 3 insertions, 3 deletions
@@ -89,15 +89,15 @@ struct segdesc { // | Sign | PML4 |Page Directory| Page Dir |Page Table | Offset Page | // |Extend| Index | Pointer Index| Index | Index | in Page | // +------+-------+--------------+----------+------------+-------------+ -// \-PMX(va)-/\-PDPX(va)--/ \-PDX(va)-/ \-PTX(va)-/ +// L3 pgtab L2 pgtab L1 pgtab L0 pgtab // Page directory and page table constants. -#define NPDENTRIES 512 // # directory entries per page directory +#define NPDENTRIES 512 // # directory entries per page directory #define PGSIZE 4096 // bytes mapped by a page #define PGSHIFT 12 // offset of PTX in a linear address #define PXMASK 0x1FF -#define PXSHIFT(n) (PGSHIFT+(9*(n))) +#define PXSHIFT(n) (PGSHIFT+(9*(n))) // shift for index into level n page table #define PX(n, va) ((((uint64) (va)) >> PXSHIFT(n)) & PXMASK) #define L_PML4 3 |