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 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 */ 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 13 14 #ifndef __ASSEMBLY__ 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) 19 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) 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 29 #define H_PTE_FRAG_NR 0 30 #define H_PTE_FRAG_SIZE_SHIFT 0 31 /* 32 * On all 4K setups, remap_4k_pfn() equates to remap_pfn_range() 33 */ 34 #define remap_4k_pfn(vma, addr, pfn, prot) \ 35 remap_pfn_range((vma), (addr), (pfn), PAGE_SIZE, (prot)) 36 37 #ifdef CONFIG_HUGETLB_PAGE 38 static inline int hash__hugepd_ok(hugepd_t hpd) 39 { 40 unsigned long hpdval = hpd_val(hpd); 41 /* 42 * if it is not a pte and have hugepd shift mask 43 * set, then it is a hugepd directory pointer 44 */ 45 if (!(hpdval & _PAGE_PTE) && 46 ((hpdval & HUGEPD_SHIFT_MASK) != 0)) 47 return true; 48 return false; 49 } 50 #endif 51 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 110 111 #endif /* !__ASSEMBLY__ */ 112 113 #endif /* _ASM_POWERPC_BOOK3S_64_HASH_4K_H */ 114