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 #ifdef CONFIG_PPC_BOOK3S_64
12 #include <asm/book3s/64/hugetlb-radix.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.pd & HUGEPD_ADDR_MASK);
27 static inline unsigned int hugepd_mmu_psize(hugepd_t hpd)
29 return (hpd.pd & 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);
43 static inline void __local_flush_hugetlb_page(struct vm_area_struct *vma,
47 return radix__local_flush_hugetlb_page(vma, vmaddr);
51 static inline pte_t *hugepd_page(hugepd_t hpd)
53 BUG_ON(!hugepd_ok(hpd));
54 return (pte_t *)((hpd.pd & ~HUGEPD_SHIFT_MASK) | PD_HUGE);
57 static inline unsigned int hugepd_shift(hugepd_t hpd)
59 return hpd.pd & HUGEPD_SHIFT_MASK;
62 #endif /* CONFIG_PPC_BOOK3S_64 */
65 static inline pte_t *hugepte_offset(hugepd_t hpd, unsigned long addr,
69 * On FSL BookE, we have multiple higher-level table entries that
70 * point to the same hugepte. Just use the first one since they're all
71 * identical. So for that case, idx=0.
73 unsigned long idx = 0;
75 pte_t *dir = hugepd_page(hpd);
76 #ifndef CONFIG_PPC_FSL_BOOK3E
77 idx = (addr & ((1UL << pdshift) - 1)) >> hugepd_shift(hpd);
83 pte_t *huge_pte_offset_and_shift(struct mm_struct *mm,
84 unsigned long addr, unsigned *shift);
86 void flush_dcache_icache_hugepage(struct page *page);
88 #if defined(CONFIG_PPC_MM_SLICES)
89 int is_hugepage_only_range(struct mm_struct *mm, unsigned long addr,
92 static inline int is_hugepage_only_range(struct mm_struct *mm,
100 void book3e_hugetlb_preload(struct vm_area_struct *vma, unsigned long ea,
102 void flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
104 void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long addr,
105 unsigned long end, unsigned long floor,
106 unsigned long ceiling);
109 * The version of vma_mmu_pagesize() in arch/powerpc/mm/hugetlbpage.c needs
110 * to override the version in mm/hugetlb.c
112 #define vma_mmu_pagesize vma_mmu_pagesize
115 * If the arch doesn't supply something else, assume that hugepage
116 * size aligned regions are ok without further preparation.
118 static inline int prepare_hugepage_range(struct file *file,
119 unsigned long addr, unsigned long len)
121 struct hstate *h = hstate_file(file);
122 if (len & ~huge_page_mask(h))
124 if (addr & ~huge_page_mask(h))
129 static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
130 pte_t *ptep, pte_t pte)
132 set_pte_at(mm, addr, ptep, pte);
135 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
136 unsigned long addr, pte_t *ptep)
139 return __pte(pte_update(mm, addr, ptep, ~0UL, 0, 1));
141 return __pte(pte_update(ptep, ~0UL, 0));
145 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
146 unsigned long addr, pte_t *ptep)
149 pte = huge_ptep_get_and_clear(vma->vm_mm, addr, ptep);
150 flush_hugetlb_page(vma, addr);
153 static inline int huge_pte_none(pte_t pte)
155 return pte_none(pte);
158 static inline pte_t huge_pte_wrprotect(pte_t pte)
160 return pte_wrprotect(pte);
163 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
164 unsigned long addr, pte_t *ptep,
165 pte_t pte, int dirty)
167 #ifdef HUGETLB_NEED_PRELOAD
169 * The "return 1" forces a call of update_mmu_cache, which will write a
170 * TLB entry. Without this, platforms that don't do a write of the TLB
171 * entry in the TLB miss handler asm will fault ad infinitum.
173 ptep_set_access_flags(vma, addr, ptep, pte, dirty);
176 return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
180 static inline pte_t huge_ptep_get(pte_t *ptep)
185 static inline void arch_clear_hugepage_flags(struct page *page)
189 #else /* ! CONFIG_HUGETLB_PAGE */
190 static inline void flush_hugetlb_page(struct vm_area_struct *vma,
191 unsigned long vmaddr)
195 #define hugepd_shift(x) 0
196 static inline pte_t *hugepte_offset(hugepd_t hpd, unsigned long addr,
201 #endif /* CONFIG_HUGETLB_PAGE */
204 * FSL Book3E platforms require special gpage handling - the gpages
205 * are reserved early in the boot process by memblock instead of via
206 * the .dts as on IBM platforms.
208 #if defined(CONFIG_HUGETLB_PAGE) && defined(CONFIG_PPC_FSL_BOOK3E)
209 extern void __init reserve_hugetlb_gpages(void);
211 static inline void reserve_hugetlb_gpages(void)
216 #endif /* _ASM_POWERPC_HUGETLB_H */