1 #ifndef _ASM_POWERPC_BOOK3S_64_HASH_4K_H 2 #define _ASM_POWERPC_BOOK3S_64_HASH_4K_H 3 /* 4 * Entries per page directory level. The PTE level must use a 64b record 5 * for each page table entry. The PMD and PGD level use a 32b record for 6 * each entry by assuming that each entry is page aligned. 7 */ 8 #define H_PTE_INDEX_SIZE 9 9 #define H_PMD_INDEX_SIZE 7 10 #define H_PUD_INDEX_SIZE 9 11 #define H_PGD_INDEX_SIZE 9 12 13 #ifndef __ASSEMBLY__ 14 #define H_PTE_TABLE_SIZE (sizeof(pte_t) << H_PTE_INDEX_SIZE) 15 #define H_PMD_TABLE_SIZE (sizeof(pmd_t) << H_PMD_INDEX_SIZE) 16 #define H_PUD_TABLE_SIZE (sizeof(pud_t) << H_PUD_INDEX_SIZE) 17 #define H_PGD_TABLE_SIZE (sizeof(pgd_t) << H_PGD_INDEX_SIZE) 18 19 /* PTE flags to conserve for HPTE identification */ 20 #define _PAGE_HPTEFLAGS (H_PAGE_BUSY | H_PAGE_HASHPTE | \ 21 H_PAGE_F_SECOND | H_PAGE_F_GIX) 22 /* 23 * Not supported by 4k linux page size 24 */ 25 #define H_PAGE_4K_PFN 0x0 26 #define H_PAGE_THP_HUGE 0x0 27 #define H_PAGE_COMBO 0x0 28 #define H_PTE_FRAG_NR 0 29 #define H_PTE_FRAG_SIZE_SHIFT 0 30 /* 31 * On all 4K setups, remap_4k_pfn() equates to remap_pfn_range() 32 */ 33 #define remap_4k_pfn(vma, addr, pfn, prot) \ 34 remap_pfn_range((vma), (addr), (pfn), PAGE_SIZE, (prot)) 35 36 #ifdef CONFIG_HUGETLB_PAGE 37 static inline int hash__hugepd_ok(hugepd_t hpd) 38 { 39 unsigned long hpdval = hpd_val(hpd); 40 /* 41 * if it is not a pte and have hugepd shift mask 42 * set, then it is a hugepd directory pointer 43 */ 44 if (!(hpdval & _PAGE_PTE) && 45 ((hpdval & HUGEPD_SHIFT_MASK) != 0)) 46 return true; 47 return false; 48 } 49 #endif 50 51 #ifdef CONFIG_TRANSPARENT_HUGEPAGE 52 53 static inline char *get_hpte_slot_array(pmd_t *pmdp) 54 { 55 BUG(); 56 return NULL; 57 } 58 59 static inline unsigned int hpte_valid(unsigned char *hpte_slot_array, int index) 60 { 61 BUG(); 62 return 0; 63 } 64 65 static inline unsigned int hpte_hash_index(unsigned char *hpte_slot_array, 66 int index) 67 { 68 BUG(); 69 return 0; 70 } 71 72 static inline void mark_hpte_slot_valid(unsigned char *hpte_slot_array, 73 unsigned int index, unsigned int hidx) 74 { 75 BUG(); 76 } 77 78 static inline int hash__pmd_trans_huge(pmd_t pmd) 79 { 80 return 0; 81 } 82 83 static inline int hash__pmd_same(pmd_t pmd_a, pmd_t pmd_b) 84 { 85 BUG(); 86 return 0; 87 } 88 89 static inline pmd_t hash__pmd_mkhuge(pmd_t pmd) 90 { 91 BUG(); 92 return pmd; 93 } 94 95 extern unsigned long hash__pmd_hugepage_update(struct mm_struct *mm, 96 unsigned long addr, pmd_t *pmdp, 97 unsigned long clr, unsigned long set); 98 extern pmd_t hash__pmdp_collapse_flush(struct vm_area_struct *vma, 99 unsigned long address, pmd_t *pmdp); 100 extern void hash__pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp, 101 pgtable_t pgtable); 102 extern pgtable_t hash__pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp); 103 extern void hash__pmdp_huge_split_prepare(struct vm_area_struct *vma, 104 unsigned long address, pmd_t *pmdp); 105 extern pmd_t hash__pmdp_huge_get_and_clear(struct mm_struct *mm, 106 unsigned long addr, pmd_t *pmdp); 107 extern int hash__has_transparent_hugepage(void); 108 #endif 109 110 #endif /* !__ASSEMBLY__ */ 111 112 #endif /* _ASM_POWERPC_BOOK3S_64_HASH_4K_H */ 113