projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| ab537dca AK |
2 | #ifndef _ASM_POWERPC_BOOK3S_64_HASH_4K_H |
| 3 | #define _ASM_POWERPC_BOOK3S_64_HASH_4K_H | |
| 4 | /* | |
| 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. | |
| 8 | */ | |
| dd1842a2 AK |
9 | #define H_PTE_INDEX_SIZE 9 |
| 10 | #define H_PMD_INDEX_SIZE 7 | |
| 11 | #define H_PUD_INDEX_SIZE 9 | |
| 92d9dfda | 12 | #define H_PGD_INDEX_SIZE 9 |
| ab537dca AK |
13 | |
| 14 | #ifndef __ASSEMBLY__ | |
| dd1842a2 AK |
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) | |
| ab537dca | 19 | |
| c605782b | 20 | /* PTE flags to conserve for HPTE identification */ |
| 945537df AK |
21 | #define _PAGE_HPTEFLAGS (H_PAGE_BUSY | H_PAGE_HASHPTE | \ |
| 22 | H_PAGE_F_SECOND | H_PAGE_F_GIX) | |
| 23 | /* | |
| 24 | * Not supported by 4k linux page size | |
| 25 | */ | |
| 26 | #define H_PAGE_4K_PFN 0x0 | |
| 27 | #define H_PAGE_THP_HUGE 0x0 | |
| 28 | #define H_PAGE_COMBO 0x0 | |
| 5ed7ecd0 AK |
29 | #define H_PTE_FRAG_NR 0 |
| 30 | #define H_PTE_FRAG_SIZE_SHIFT 0 | |
| ab537dca | 31 | /* |
| 368ced78 | 32 | * On all 4K setups, remap_4k_pfn() equates to remap_pfn_range() |
| ab537dca | 33 | */ |
| ab537dca AK |
34 | #define remap_4k_pfn(vma, addr, pfn, prot) \ |
| 35 | remap_pfn_range((vma), (addr), (pfn), PAGE_SIZE, (prot)) | |
| 36 | ||
| 26a344ae | 37 | #ifdef CONFIG_HUGETLB_PAGE |
| c0a6c719 | 38 | static inline int hash__hugepd_ok(hugepd_t hpd) |
| 26a344ae | 39 | { |
| 20717e1f | 40 | unsigned long hpdval = hpd_val(hpd); |
| 26a344ae | 41 | /* |
| 6a119eae AK |
42 | * if it is not a pte and have hugepd shift mask |
| 43 | * set, then it is a hugepd directory pointer | |
| 26a344ae | 44 | */ |
| 20717e1f AK |
45 | if (!(hpdval & _PAGE_PTE) && |
| 46 | ((hpdval & HUGEPD_SHIFT_MASK) != 0)) | |
| 6a119eae AK |
47 | return true; |
| 48 | return false; | |
| 26a344ae | 49 | } |
| 26a344ae AK |
50 | #endif |
| 51 | ||
| ab624762 AK |
52 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
| 53 | ||
| 54 | static inline char *get_hpte_slot_array(pmd_t *pmdp) | |
| 55 | { | |
| 56 | BUG(); | |
| 57 | return NULL; | |
| 58 | } | |
| 59 | ||
| 60 | static inline unsigned int hpte_valid(unsigned char *hpte_slot_array, int index) | |
| 61 | { | |
| 62 | BUG(); | |
| 63 | return 0; | |
| 64 | } | |
| 65 | ||
| 66 | static inline unsigned int hpte_hash_index(unsigned char *hpte_slot_array, | |
| 67 | int index) | |
| 68 | { | |
| 69 | BUG(); | |
| 70 | return 0; | |
| 71 | } | |
| 72 | ||
| 73 | static inline void mark_hpte_slot_valid(unsigned char *hpte_slot_array, | |
| 74 | unsigned int index, unsigned int hidx) | |
| 75 | { | |
| 76 | BUG(); | |
| 77 | } | |
| 78 | ||
| 79 | static inline int hash__pmd_trans_huge(pmd_t pmd) | |
| 80 | { | |
| 81 | return 0; | |
| 82 | } | |
| 83 | ||
| 84 | static inline int hash__pmd_same(pmd_t pmd_a, pmd_t pmd_b) | |
| 85 | { | |
| 86 | BUG(); | |
| 87 | return 0; | |
| 88 | } | |
| 89 | ||
| 90 | static inline pmd_t hash__pmd_mkhuge(pmd_t pmd) | |
| 91 | { | |
| 92 | BUG(); | |
| 93 | return pmd; | |
| 94 | } | |
| 95 | ||
| 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, | |
| 102 | pgtable_t pgtable); | |
| 103 | extern pgtable_t hash__pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp); | |
| 104 | extern void hash__pmdp_huge_split_prepare(struct vm_area_struct *vma, | |
| 105 | unsigned long address, pmd_t *pmdp); | |
| 106 | extern pmd_t hash__pmdp_huge_get_and_clear(struct mm_struct *mm, | |
| 107 | unsigned long addr, pmd_t *pmdp); | |
| 108 | extern int hash__has_transparent_hugepage(void); | |
| 109 | #endif | |
| 110 | ||
| ab537dca AK |
111 | #endif /* !__ASSEMBLY__ */ |
| 112 | ||
| 113 | #endif /* _ASM_POWERPC_BOOK3S_64_HASH_4K_H */ |