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1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_POWERPC_BOOK3S_64_HASH_4K_H
3 #define _ASM_POWERPC_BOOK3S_64_HASH_4K_H
5 * Entries per page directory level. The PTE level must use a 64b record
6 * for each page table entry. The PMD and PGD level use a 32b record for
7 * each entry by assuming that each entry is page aligned.
9 #define H_PTE_INDEX_SIZE 9
10 #define H_PMD_INDEX_SIZE 7
11 #define H_PUD_INDEX_SIZE 9
12 #define H_PGD_INDEX_SIZE 9
15 #define H_PTE_TABLE_SIZE (sizeof(pte_t) << H_PTE_INDEX_SIZE)
16 #define H_PMD_TABLE_SIZE (sizeof(pmd_t) << H_PMD_INDEX_SIZE)
17 #define H_PUD_TABLE_SIZE (sizeof(pud_t) << H_PUD_INDEX_SIZE)
18 #define H_PGD_TABLE_SIZE (sizeof(pgd_t) << H_PGD_INDEX_SIZE)
20 /* PTE flags to conserve for HPTE identification */
21 #define _PAGE_HPTEFLAGS (H_PAGE_BUSY | H_PAGE_HASHPTE | \
22 H_PAGE_F_SECOND | H_PAGE_F_GIX)
24 * Not supported by 4k linux page size
26 #define H_PAGE_4K_PFN 0x0
27 #define H_PAGE_THP_HUGE 0x0
28 #define H_PAGE_COMBO 0x0
29 #define H_PTE_FRAG_NR 0
30 #define H_PTE_FRAG_SIZE_SHIFT 0
32 * On all 4K setups, remap_4k_pfn() equates to remap_pfn_range()
34 #define remap_4k_pfn(vma, addr, pfn, prot) \
35 remap_pfn_range((vma), (addr), (pfn), PAGE_SIZE, (prot))
37 #ifdef CONFIG_HUGETLB_PAGE
38 static inline int hash__hugepd_ok(hugepd_t hpd
)
40 unsigned long hpdval
= hpd_val(hpd
);
42 * if it is not a pte and have hugepd shift mask
43 * set, then it is a hugepd directory pointer
45 if (!(hpdval
& _PAGE_PTE
) &&
46 ((hpdval
& HUGEPD_SHIFT_MASK
) != 0))
52 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
54 static inline char *get_hpte_slot_array(pmd_t
*pmdp
)
60 static inline unsigned int hpte_valid(unsigned char *hpte_slot_array
, int index
)
66 static inline unsigned int hpte_hash_index(unsigned char *hpte_slot_array
,
73 static inline void mark_hpte_slot_valid(unsigned char *hpte_slot_array
,
74 unsigned int index
, unsigned int hidx
)
79 static inline int hash__pmd_trans_huge(pmd_t pmd
)
84 static inline int hash__pmd_same(pmd_t pmd_a
, pmd_t pmd_b
)
90 static inline pmd_t
hash__pmd_mkhuge(pmd_t pmd
)
96 extern unsigned long hash__pmd_hugepage_update(struct mm_struct
*mm
,
97 unsigned long addr
, pmd_t
*pmdp
,
98 unsigned long clr
, unsigned long set
);
99 extern pmd_t
hash__pmdp_collapse_flush(struct vm_area_struct
*vma
,
100 unsigned long address
, pmd_t
*pmdp
);
101 extern void hash__pgtable_trans_huge_deposit(struct mm_struct
*mm
, pmd_t
*pmdp
,
103 extern pgtable_t
hash__pgtable_trans_huge_withdraw(struct mm_struct
*mm
, pmd_t
*pmdp
);
104 extern pmd_t
hash__pmdp_huge_get_and_clear(struct mm_struct
*mm
,
105 unsigned long addr
, pmd_t
*pmdp
);
106 extern int hash__has_transparent_hugepage(void);
109 #endif /* !__ASSEMBLY__ */
111 #endif /* _ASM_POWERPC_BOOK3S_64_HASH_4K_H */