diff options
Diffstat (limited to 'mmu.h')
| -rw-r--r-- | mmu.h | 12 |
1 files changed, 6 insertions, 6 deletions
@@ -118,13 +118,13 @@ struct segdesc { #define PGADDR(d, t, o) ((uint)((d) << PDXSHIFT | (t) << PTXSHIFT | (o))) // Page directory and page table constants. -#define NPDENTRIES 1024 // page directory entries per page directory -#define NPTENTRIES 1024 // page table entries per page table -#define PGSIZE 4096 // bytes mapped by a page +#define NPDENTRIES 1024 // # directory entries per page directory +#define NPTENTRIES 1024 // # PTEs per page table +#define PGSIZE 4096 // bytes mapped by a page -#define PGSHIFT 12 // log2(PGSIZE) -#define PTXSHIFT 12 // offset of PTX in a linear address -#define PDXSHIFT 22 // offset of PDX in a linear address +#define PGSHIFT 12 // log2(PGSIZE) +#define PTXSHIFT 12 // offset of PTX in a linear address +#define PDXSHIFT 22 // offset of PDX in a linear address #define PGROUNDUP(sz) (((sz)+PGSIZE-1) & ~(PGSIZE-1)) #define PGROUNDDOWN(a) (((a)) & ~(PGSIZE-1)) |