1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_POWERPC_HUGETLB_H
3 #define _ASM_POWERPC_HUGETLB_H
5 #ifdef CONFIG_HUGETLB_PAGE
8 extern struct kmem_cache *hugepte_cache;
10 #ifdef CONFIG_PPC_BOOK3S_64
12 #include <asm/book3s/64/hugetlb.h>
14 * This should work for other subarchs too. But right now we use the
15 * new format only for 64bit book3s
17 static inline pte_t *hugepd_page(hugepd_t hpd)
19 BUG_ON(!hugepd_ok(hpd));
21 * We have only four bits to encode, MMU page size
23 BUILD_BUG_ON((MMU_PAGE_COUNT - 1) > 0xf);
24 return __va(hpd_val(hpd) & HUGEPD_ADDR_MASK);
27 static inline unsigned int hugepd_mmu_psize(hugepd_t hpd)
29 return (hpd_val(hpd) & HUGEPD_SHIFT_MASK) >> 2;
32 static inline unsigned int hugepd_shift(hugepd_t hpd)
34 return mmu_psize_to_shift(hugepd_mmu_psize(hpd));
36 static inline void flush_hugetlb_page(struct vm_area_struct *vma,
40 return radix__flush_hugetlb_page(vma, vmaddr);
45 static inline pte_t *hugepd_page(hugepd_t hpd)
47 BUG_ON(!hugepd_ok(hpd));
49 return (pte_t *)__va(hpd_val(hpd) & ~HUGEPD_SHIFT_MASK);
51 return (pte_t *)((hpd_val(hpd) &
52 ~HUGEPD_SHIFT_MASK) | PD_HUGE);
56 static inline unsigned int hugepd_shift(hugepd_t hpd)
59 return ((hpd_val(hpd) & _PMD_PAGE_MASK) >> 1) + 17;
61 return hpd_val(hpd) & HUGEPD_SHIFT_MASK;
65 #endif /* CONFIG_PPC_BOOK3S_64 */
68 static inline pte_t *hugepte_offset(hugepd_t hpd, unsigned long addr,
72 * On FSL BookE, we have multiple higher-level table entries that
73 * point to the same hugepte. Just use the first one since they're all
74 * identical. So for that case, idx=0.
76 unsigned long idx = 0;
78 pte_t *dir = hugepd_page(hpd);
79 #ifndef CONFIG_PPC_FSL_BOOK3E
80 idx = (addr & ((1UL << pdshift) - 1)) >> hugepd_shift(hpd);
86 void flush_dcache_icache_hugepage(struct page *page);
88 int slice_is_hugepage_only_range(struct mm_struct *mm, unsigned long addr,
91 static inline int is_hugepage_only_range(struct mm_struct *mm,
95 if (IS_ENABLED(CONFIG_PPC_MM_SLICES) && !radix_enabled())
96 return slice_is_hugepage_only_range(mm, addr, len);
100 void book3e_hugetlb_preload(struct vm_area_struct *vma, unsigned long ea,
102 #ifdef CONFIG_PPC_8xx
103 static inline void flush_hugetlb_page(struct vm_area_struct *vma,
104 unsigned long vmaddr)
106 flush_tlb_page(vma, vmaddr);
109 void flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
112 #define __HAVE_ARCH_HUGETLB_FREE_PGD_RANGE
113 void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long addr,
114 unsigned long end, unsigned long floor,
115 unsigned long ceiling);
118 * If the arch doesn't supply something else, assume that hugepage
119 * size aligned regions are ok without further preparation.
121 static inline int prepare_hugepage_range(struct file *file,
122 unsigned long addr, unsigned long len)
124 struct hstate *h = hstate_file(file);
125 if (len & ~huge_page_mask(h))
127 if (addr & ~huge_page_mask(h))
132 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
133 unsigned long addr, pte_t *ptep)
136 return __pte(pte_update(mm, addr, ptep, ~0UL, 0, 1));
138 return __pte(pte_update(ptep, ~0UL, 0));
142 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
143 unsigned long addr, pte_t *ptep)
146 pte = huge_ptep_get_and_clear(vma->vm_mm, addr, ptep);
147 flush_hugetlb_page(vma, addr);
150 static inline int huge_pte_none(pte_t pte)
152 return pte_none(pte);
155 static inline pte_t huge_pte_wrprotect(pte_t pte)
157 return pte_wrprotect(pte);
160 extern int huge_ptep_set_access_flags(struct vm_area_struct *vma,
161 unsigned long addr, pte_t *ptep,
162 pte_t pte, int dirty);
164 static inline pte_t huge_ptep_get(pte_t *ptep)
169 static inline void arch_clear_hugepage_flags(struct page *page)
173 #include <asm-generic/hugetlb.h>
175 #else /* ! CONFIG_HUGETLB_PAGE */
176 static inline void flush_hugetlb_page(struct vm_area_struct *vma,
177 unsigned long vmaddr)
181 #define hugepd_shift(x) 0
182 static inline pte_t *hugepte_offset(hugepd_t hpd, unsigned long addr,
187 #endif /* CONFIG_HUGETLB_PAGE */
189 #endif /* _ASM_POWERPC_HUGETLB_H */