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6d779079 GS |
1 | #ifndef _ASM_POWERPC_HUGETLB_H |
2 | #define _ASM_POWERPC_HUGETLB_H | |
3 | ||
41151e77 | 4 | #ifdef CONFIG_HUGETLB_PAGE |
6d779079 | 5 | #include <asm/page.h> |
106c992a | 6 | #include <asm-generic/hugetlb.h> |
6d779079 | 7 | |
41151e77 | 8 | extern struct kmem_cache *hugepte_cache; |
41151e77 BB |
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 | /* | |
881fde1d BB |
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 | |
41151e77 BB |
27 | * identical. So for that case, idx=0. |
28 | */ | |
29 | unsigned long idx = 0; | |
30 | ||
31 | pte_t *dir = hugepd_page(*hpdp); | |
881fde1d | 32 | #ifndef CONFIG_PPC_FSL_BOOK3E |
41151e77 BB |
33 | idx = (addr & ((1UL << pdshift) - 1)) >> hugepd_shift(*hpdp); |
34 | #endif | |
35 | ||
36 | return dir + idx; | |
37 | } | |
38 | ||
883a3e52 DG |
39 | pte_t *huge_pte_offset_and_shift(struct mm_struct *mm, |
40 | unsigned long addr, unsigned *shift); | |
41 | ||
0895ecda DG |
42 | void flush_dcache_icache_hugepage(struct page *page); |
43 | ||
41151e77 | 44 | #if defined(CONFIG_PPC_MM_SLICES) || defined(CONFIG_PPC_SUBPAGE_PROT) |
6d779079 GS |
45 | int is_hugepage_only_range(struct mm_struct *mm, unsigned long addr, |
46 | unsigned long len); | |
41151e77 BB |
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 | ||
d93e4d7d BB |
56 | void book3e_hugetlb_preload(struct vm_area_struct *vma, unsigned long ea, |
57 | pte_t pte); | |
41151e77 | 58 | void flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr); |
6d779079 | 59 | |
42b77728 | 60 | void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long addr, |
6d779079 GS |
61 | unsigned long end, unsigned long floor, |
62 | unsigned long ceiling); | |
63 | ||
3340289d MG |
64 | /* |
65 | * The version of vma_mmu_pagesize() in arch/powerpc/mm/hugetlbpage.c needs | |
66 | * to override the version in mm/hugetlb.c | |
67 | */ | |
68 | #define vma_mmu_pagesize vma_mmu_pagesize | |
69 | ||
6d779079 GS |
70 | /* |
71 | * If the arch doesn't supply something else, assume that hugepage | |
72 | * size aligned regions are ok without further preparation. | |
73 | */ | |
a5516438 AK |
74 | static inline int prepare_hugepage_range(struct file *file, |
75 | unsigned long addr, unsigned long len) | |
6d779079 | 76 | { |
0d9ea754 JT |
77 | struct hstate *h = hstate_file(file); |
78 | if (len & ~huge_page_mask(h)) | |
6d779079 | 79 | return -EINVAL; |
0d9ea754 | 80 | if (addr & ~huge_page_mask(h)) |
6d779079 GS |
81 | return -EINVAL; |
82 | return 0; | |
83 | } | |
84 | ||
85 | static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm) | |
86 | { | |
87 | } | |
88 | ||
0895ecda DG |
89 | |
90 | static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, | |
91 | pte_t *ptep, pte_t pte) | |
92 | { | |
93 | set_pte_at(mm, addr, ptep, pte); | |
94 | } | |
95 | ||
96 | static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm, | |
97 | unsigned long addr, pte_t *ptep) | |
98 | { | |
41151e77 BB |
99 | #ifdef CONFIG_PPC64 |
100 | return __pte(pte_update(mm, addr, ptep, ~0UL, 1)); | |
101 | #else | |
102 | return __pte(pte_update(ptep, ~0UL, 0)); | |
103 | #endif | |
0895ecda DG |
104 | } |
105 | ||
8fe627ec GS |
106 | static inline void huge_ptep_clear_flush(struct vm_area_struct *vma, |
107 | unsigned long addr, pte_t *ptep) | |
108 | { | |
0895ecda DG |
109 | pte_t pte; |
110 | pte = huge_ptep_get_and_clear(vma->vm_mm, addr, ptep); | |
111 | flush_tlb_page(vma, addr); | |
8fe627ec GS |
112 | } |
113 | ||
7f2e9525 GS |
114 | static inline int huge_pte_none(pte_t pte) |
115 | { | |
116 | return pte_none(pte); | |
117 | } | |
118 | ||
119 | static inline pte_t huge_pte_wrprotect(pte_t pte) | |
120 | { | |
121 | return pte_wrprotect(pte); | |
122 | } | |
123 | ||
7f2e9525 GS |
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) | |
127 | { | |
1f6820b4 | 128 | #ifdef HUGETLB_NEED_PRELOAD |
97632e6f BB |
129 | /* |
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. | |
133 | */ | |
134 | ptep_set_access_flags(vma, addr, ptep, pte, dirty); | |
135 | return 1; | |
136 | #else | |
7f2e9525 | 137 | return ptep_set_access_flags(vma, addr, ptep, pte, dirty); |
97632e6f | 138 | #endif |
7f2e9525 GS |
139 | } |
140 | ||
141 | static inline pte_t huge_ptep_get(pte_t *ptep) | |
142 | { | |
143 | return *ptep; | |
144 | } | |
145 | ||
146 | static inline int arch_prepare_hugepage(struct page *page) | |
147 | { | |
148 | return 0; | |
149 | } | |
150 | ||
151 | static inline void arch_release_hugepage(struct page *page) | |
152 | { | |
153 | } | |
154 | ||
5d3a551c WD |
155 | static inline void arch_clear_hugepage_flags(struct page *page) |
156 | { | |
157 | } | |
158 | ||
41151e77 | 159 | #else /* ! CONFIG_HUGETLB_PAGE */ |
41151e77 BB |
160 | static inline void flush_hugetlb_page(struct vm_area_struct *vma, |
161 | unsigned long vmaddr) | |
162 | { | |
163 | } | |
a6146888 BB |
164 | #endif /* CONFIG_HUGETLB_PAGE */ |
165 | ||
166 | ||
167 | /* | |
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. | |
171 | */ | |
172 | #if defined(CONFIG_HUGETLB_PAGE) && defined(CONFIG_PPC_FSL_BOOK3E) | |
173 | extern void __init reserve_hugetlb_gpages(void); | |
174 | #else | |
175 | static inline void reserve_hugetlb_gpages(void) | |
176 | { | |
177 | } | |
41151e77 BB |
178 | #endif |
179 | ||
6d779079 | 180 | #endif /* _ASM_POWERPC_HUGETLB_H */ |