1 #ifndef _ASM_POWERPC_HUGETLB_H
2 #define _ASM_POWERPC_HUGETLB_H
4 #ifdef CONFIG_HUGETLB_PAGE
6 #include <asm-generic/hugetlb.h>
8 extern struct kmem_cache *hugepte_cache;
10 static inline pte_t *hugepd_page(hugepd_t hpd)
12 BUG_ON(!hugepd_ok(hpd));
13 return (pte_t *)((hpd.pd & ~HUGEPD_SHIFT_MASK) | PD_HUGE);
16 static inline unsigned int hugepd_shift(hugepd_t hpd)
18 return hpd.pd & HUGEPD_SHIFT_MASK;
21 static inline pte_t *hugepte_offset(hugepd_t *hpdp, unsigned long addr,
25 * On FSL BookE, we have multiple higher-level table entries that
26 * point to the same hugepte. Just use the first one since they're all
27 * identical. So for that case, idx=0.
29 unsigned long idx = 0;
31 pte_t *dir = hugepd_page(*hpdp);
32 #ifndef CONFIG_PPC_FSL_BOOK3E
33 idx = (addr & ((1UL << pdshift) - 1)) >> hugepd_shift(*hpdp);
39 pte_t *huge_pte_offset_and_shift(struct mm_struct *mm,
40 unsigned long addr, unsigned *shift);
42 void flush_dcache_icache_hugepage(struct page *page);
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,
48 static inline int is_hugepage_only_range(struct mm_struct *mm,
56 void book3e_hugetlb_preload(struct vm_area_struct *vma, unsigned long ea,
58 void flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
60 void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long addr,
61 unsigned long end, unsigned long floor,
62 unsigned long ceiling);
65 * The version of vma_mmu_pagesize() in arch/powerpc/mm/hugetlbpage.c needs
66 * to override the version in mm/hugetlb.c
68 #define vma_mmu_pagesize vma_mmu_pagesize
71 * If the arch doesn't supply something else, assume that hugepage
72 * size aligned regions are ok without further preparation.
74 static inline int prepare_hugepage_range(struct file *file,
75 unsigned long addr, unsigned long len)
77 struct hstate *h = hstate_file(file);
78 if (len & ~huge_page_mask(h))
80 if (addr & ~huge_page_mask(h))
85 static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm)
90 static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
91 pte_t *ptep, pte_t pte)
93 set_pte_at(mm, addr, ptep, pte);
96 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
97 unsigned long addr, pte_t *ptep)
100 return __pte(pte_update(mm, addr, ptep, ~0UL, 1));
102 return __pte(pte_update(ptep, ~0UL, 0));
106 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
107 unsigned long addr, pte_t *ptep)
110 pte = huge_ptep_get_and_clear(vma->vm_mm, addr, ptep);
111 flush_tlb_page(vma, addr);
114 static inline int huge_pte_none(pte_t pte)
116 return pte_none(pte);
119 static inline pte_t huge_pte_wrprotect(pte_t pte)
121 return pte_wrprotect(pte);
124 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
125 unsigned long addr, pte_t *ptep,
126 pte_t pte, int dirty)
128 #ifdef HUGETLB_NEED_PRELOAD
130 * The "return 1" forces a call of update_mmu_cache, which will write a
131 * TLB entry. Without this, platforms that don't do a write of the TLB
132 * entry in the TLB miss handler asm will fault ad infinitum.
134 ptep_set_access_flags(vma, addr, ptep, pte, dirty);
137 return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
141 static inline pte_t huge_ptep_get(pte_t *ptep)
146 static inline int arch_prepare_hugepage(struct page *page)
151 static inline void arch_release_hugepage(struct page *page)
155 static inline void arch_clear_hugepage_flags(struct page *page)
159 #else /* ! CONFIG_HUGETLB_PAGE */
160 static inline void flush_hugetlb_page(struct vm_area_struct *vma,
161 unsigned long vmaddr)
164 #endif /* CONFIG_HUGETLB_PAGE */
168 * FSL Book3E platforms require special gpage handling - the gpages
169 * are reserved early in the boot process by memblock instead of via
170 * the .dts as on IBM platforms.
172 #if defined(CONFIG_HUGETLB_PAGE) && defined(CONFIG_PPC_FSL_BOOK3E)
173 extern void __init reserve_hugetlb_gpages(void);
175 static inline void reserve_hugetlb_gpages(void)
180 #endif /* _ASM_POWERPC_HUGETLB_H */