diff options
Diffstat (limited to 'sys/i386/include/param.h')
| -rw-r--r-- | sys/i386/include/param.h | 32 |
1 files changed, 15 insertions, 17 deletions
diff --git a/sys/i386/include/param.h b/sys/i386/include/param.h index 2033433ae271..7b1d05eebf15 100644 --- a/sys/i386/include/param.h +++ b/sys/i386/include/param.h @@ -88,25 +88,23 @@ #define CACHE_LINE_SIZE (1 << CACHE_LINE_SHIFT) #define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */ -#define PAGE_SIZE (1<<PAGE_SHIFT) /* bytes/page */ -#define PAGE_MASK (PAGE_SIZE-1) -#define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t))) +#define PAGE_SIZE (1 << PAGE_SHIFT) /* bytes/page */ +#define PAGE_MASK (PAGE_SIZE - 1) +#define NPTEPG (PAGE_SIZE / sizeof(pt_entry_t)) -#if defined(PAE) || defined(PAE_TABLES) -#define NPGPTD 4 -#define PDRSHIFT 21 /* LOG2(NBPDR) */ -#define NPGPTD_SHIFT 9 -#else -#define NPGPTD 1 -#define PDRSHIFT 22 /* LOG2(NBPDR) */ -#define NPGPTD_SHIFT 10 +/* Size in bytes of the page directory */ +#define NBPTD (NPGPTD << PAGE_SHIFT) +/* Number of PDEs in page directory, 2048 for PAE, 1024 for non-PAE */ +#define NPDEPTD (NBPTD / sizeof(pd_entry_t)) +/* Number of PDEs in one page of the page directory, 512 vs. 1024 */ +#define NPDEPG (PAGE_SIZE / sizeof(pd_entry_t)) +#define PDRMASK (NBPDR - 1) +#ifndef PDRSHIFT +#define PDRSHIFT i386_pmap_PDRSHIFT +#endif +#ifndef NBPDR +#define NBPDR (1 << PDRSHIFT) /* bytes/page dir */ #endif - -#define NBPTD (NPGPTD<<PAGE_SHIFT) -#define NPDEPTD (NBPTD/(sizeof (pd_entry_t))) -#define NPDEPG (PAGE_SIZE/(sizeof (pd_entry_t))) -#define NBPDR (1<<PDRSHIFT) /* bytes/page dir */ -#define PDRMASK (NBPDR-1) #define MAXPAGESIZES 2 /* maximum number of supported page sizes */ |