[MIPS] Compute PGD_ORDER from the select page size.

 * Entries per page directory level: we use two-level, so

 * we don't really have any PUD/PMD directory physically.

 */

#ifdef CONFIG_64BIT_PHYS_ADDR

#define PGD_ORDER	1

#define PUD_ORDER	aieeee_attempt_to_allocate_pud

#define PMD_ORDER	1

#define PTE_ORDER	0

#else

#define PGD_ORDER	0

#define __PGD_ORDER	(32 - 3 * PAGE_SHIFT + PGD_T_LOG2 + PTE_T_LOG2)

#define PGD_ORDER	(__PGD_ORDER >= 0 ? __PGD_ORDER : 0)

#define PUD_ORDER	aieeee_attempt_to_allocate_pud

#define PMD_ORDER	1

#define PTE_ORDER	0

#endif

#define PTRS_PER_PGD	((PAGE_SIZE << PGD_ORDER) / sizeof(pgd_t))

#define PTRS_PER_PTE	((PAGE_SIZE << PTE_ORDER) / sizeof(pte_t))