1 #ifndef _ASM_POWERPC_HUGETLB_H 2 #define _ASM_POWERPC_HUGETLB_H 3 4 #ifdef CONFIG_HUGETLB_PAGE 5 #include <asm/page.h> 6 7 extern struct kmem_cache *hugepte_cache; 8 extern void __init reserve_hugetlb_gpages(void); 9 10 static inline pte_t *hugepd_page(hugepd_t hpd) 11 { 12 BUG_ON(!hugepd_ok(hpd)); 13 return (pte_t *)((hpd.pd & ~HUGEPD_SHIFT_MASK) | PD_HUGE); 14 } 15 16 static inline unsigned int hugepd_shift(hugepd_t hpd) 17 { 18 return hpd.pd & HUGEPD_SHIFT_MASK; 19 } 20 21 static inline pte_t *hugepte_offset(hugepd_t *hpdp, unsigned long addr, 22 unsigned pdshift) 23 { 24 /* 25 * On 32-bit, we have multiple higher-level table entries that point to 26 * the same hugepte. Just use the first one since they're all 27 * identical. So for that case, idx=0. 28 */ 29 unsigned long idx = 0; 30 31 pte_t *dir = hugepd_page(*hpdp); 32 #ifdef CONFIG_PPC64 33 idx = (addr & ((1UL << pdshift) - 1)) >> hugepd_shift(*hpdp); 34 #endif 35 36 return dir + idx; 37 } 38 39 pte_t *huge_pte_offset_and_shift(struct mm_struct *mm, 40 unsigned long addr, unsigned *shift); 41 42 void flush_dcache_icache_hugepage(struct page *page); 43 44 #if defined(CONFIG_PPC_MM_SLICES) || defined(CONFIG_PPC_SUBPAGE_PROT) 45 int is_hugepage_only_range(struct mm_struct *mm, unsigned long addr, 46 unsigned long len); 47 #else 48 static inline int is_hugepage_only_range(struct mm_struct *mm, 49 unsigned long addr, 50 unsigned long len) 51 { 52 return 0; 53 } 54 #endif 55 56 void book3e_hugetlb_preload(struct mm_struct *mm, unsigned long ea, pte_t pte); 57 void flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr); 58 59 void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long addr, 60 unsigned long end, unsigned long floor, 61 unsigned long ceiling); 62 63 /* 64 * The version of vma_mmu_pagesize() in arch/powerpc/mm/hugetlbpage.c needs 65 * to override the version in mm/hugetlb.c 66 */ 67 #define vma_mmu_pagesize vma_mmu_pagesize 68 69 /* 70 * If the arch doesn't supply something else, assume that hugepage 71 * size aligned regions are ok without further preparation. 72 */ 73 static inline int prepare_hugepage_range(struct file *file, 74 unsigned long addr, unsigned long len) 75 { 76 struct hstate *h = hstate_file(file); 77 if (len & ~huge_page_mask(h)) 78 return -EINVAL; 79 if (addr & ~huge_page_mask(h)) 80 return -EINVAL; 81 return 0; 82 } 83 84 static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm) 85 { 86 } 87 88 89 static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, 90 pte_t *ptep, pte_t pte) 91 { 92 set_pte_at(mm, addr, ptep, pte); 93 } 94 95 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm, 96 unsigned long addr, pte_t *ptep) 97 { 98 #ifdef CONFIG_PPC64 99 return __pte(pte_update(mm, addr, ptep, ~0UL, 1)); 100 #else 101 return __pte(pte_update(ptep, ~0UL, 0)); 102 #endif 103 } 104 105 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma, 106 unsigned long addr, pte_t *ptep) 107 { 108 pte_t pte; 109 pte = huge_ptep_get_and_clear(vma->vm_mm, addr, ptep); 110 flush_tlb_page(vma, addr); 111 } 112 113 static inline int huge_pte_none(pte_t pte) 114 { 115 return pte_none(pte); 116 } 117 118 static inline pte_t huge_pte_wrprotect(pte_t pte) 119 { 120 return pte_wrprotect(pte); 121 } 122 123 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma, 124 unsigned long addr, pte_t *ptep, 125 pte_t pte, int dirty) 126 { 127 return ptep_set_access_flags(vma, addr, ptep, pte, dirty); 128 } 129 130 static inline pte_t huge_ptep_get(pte_t *ptep) 131 { 132 return *ptep; 133 } 134 135 static inline int arch_prepare_hugepage(struct page *page) 136 { 137 return 0; 138 } 139 140 static inline void arch_release_hugepage(struct page *page) 141 { 142 } 143 144 #else /* ! CONFIG_HUGETLB_PAGE */ 145 static inline void reserve_hugetlb_gpages(void) 146 { 147 pr_err("Cannot reserve gpages without hugetlb enabled\n"); 148 } 149 static inline void flush_hugetlb_page(struct vm_area_struct *vma, 150 unsigned long vmaddr) 151 { 152 } 153 #endif 154 155 #endif /* _ASM_POWERPC_HUGETLB_H */ 156