1
2#ifndef _ASM_POWERPC_BOOK3S_64_PGALLOC_H
3#define _ASM_POWERPC_BOOK3S_64_PGALLOC_H
4
5
6
7#include <linux/slab.h>
8#include <linux/cpumask.h>
9#include <linux/kmemleak.h>
10#include <linux/percpu.h>
11
12struct vmemmap_backing {
13 struct vmemmap_backing *list;
14 unsigned long phys;
15 unsigned long virt_addr;
16};
17extern struct vmemmap_backing *vmemmap_list;
18
19extern pmd_t *pmd_fragment_alloc(struct mm_struct *, unsigned long);
20extern void pmd_fragment_free(unsigned long *);
21extern void pgtable_free_tlb(struct mmu_gather *tlb, void *table, int shift);
22extern void __tlb_remove_table(void *_table);
23void pte_frag_destroy(void *pte_frag);
24
25static inline pgd_t *radix__pgd_alloc(struct mm_struct *mm)
26{
27#ifdef CONFIG_PPC_64K_PAGES
28 return (pgd_t *)__get_free_page(pgtable_gfp_flags(mm, PGALLOC_GFP));
29#else
30 struct page *page;
31 page = alloc_pages(pgtable_gfp_flags(mm, PGALLOC_GFP | __GFP_RETRY_MAYFAIL),
32 4);
33 if (!page)
34 return NULL;
35 return (pgd_t *) page_address(page);
36#endif
37}
38
39static inline void radix__pgd_free(struct mm_struct *mm, pgd_t *pgd)
40{
41#ifdef CONFIG_PPC_64K_PAGES
42 free_page((unsigned long)pgd);
43#else
44 free_pages((unsigned long)pgd, 4);
45#endif
46}
47
48static inline pgd_t *pgd_alloc(struct mm_struct *mm)
49{
50 pgd_t *pgd;
51
52 if (radix_enabled())
53 return radix__pgd_alloc(mm);
54
55 pgd = kmem_cache_alloc(PGT_CACHE(PGD_INDEX_SIZE),
56 pgtable_gfp_flags(mm, GFP_KERNEL));
57 if (unlikely(!pgd))
58 return pgd;
59
60
61
62
63
64
65 kmemleak_no_scan(pgd);
66
67
68
69
70
71
72
73
74#if defined(CONFIG_HUGETLB_PAGE) && defined(CONFIG_PPC_64K_PAGES) && \
75 (H_PGD_INDEX_SIZE == H_PUD_CACHE_INDEX)
76 memset(pgd, 0, PGD_TABLE_SIZE);
77#endif
78 return pgd;
79}
80
81static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
82{
83 if (radix_enabled())
84 return radix__pgd_free(mm, pgd);
85 kmem_cache_free(PGT_CACHE(PGD_INDEX_SIZE), pgd);
86}
87
88static inline void p4d_populate(struct mm_struct *mm, p4d_t *pgd, pud_t *pud)
89{
90 *pgd = __p4d(__pgtable_ptr_val(pud) | PGD_VAL_BITS);
91}
92
93static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
94{
95 pud_t *pud;
96
97 pud = kmem_cache_alloc(PGT_CACHE(PUD_CACHE_INDEX),
98 pgtable_gfp_flags(mm, GFP_KERNEL));
99
100
101
102
103
104
105 kmemleak_ignore(pud);
106
107 return pud;
108}
109
110static inline void __pud_free(pud_t *pud)
111{
112 struct page *page = virt_to_page(pud);
113
114
115
116
117
118 if (PageReserved(page))
119 free_reserved_page(page);
120 else
121 kmem_cache_free(PGT_CACHE(PUD_CACHE_INDEX), pud);
122}
123
124static inline void pud_free(struct mm_struct *mm, pud_t *pud)
125{
126 return __pud_free(pud);
127}
128
129static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
130{
131 *pud = __pud(__pgtable_ptr_val(pmd) | PUD_VAL_BITS);
132}
133
134static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud,
135 unsigned long address)
136{
137 pgtable_free_tlb(tlb, pud, PUD_INDEX);
138}
139
140static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
141{
142 return pmd_fragment_alloc(mm, addr);
143}
144
145static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
146{
147 pmd_fragment_free((unsigned long *)pmd);
148}
149
150static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd,
151 unsigned long address)
152{
153 return pgtable_free_tlb(tlb, pmd, PMD_INDEX);
154}
155
156static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
157 pte_t *pte)
158{
159 *pmd = __pmd(__pgtable_ptr_val(pte) | PMD_VAL_BITS);
160}
161
162static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
163 pgtable_t pte_page)
164{
165 *pmd = __pmd(__pgtable_ptr_val(pte_page) | PMD_VAL_BITS);
166}
167
168static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table,
169 unsigned long address)
170{
171 pgtable_free_tlb(tlb, table, PTE_INDEX);
172}
173
174extern atomic_long_t direct_pages_count[MMU_PAGE_COUNT];
175static inline void update_page_count(int psize, long count)
176{
177 if (IS_ENABLED(CONFIG_PROC_FS))
178 atomic_long_add(count, &direct_pages_count[psize]);
179}
180
181#endif
182