1 #ifndef _ASM_POWERPC_PGALLOC_64_H
2 #define _ASM_POWERPC_PGALLOC_64_H
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
11 #include <linux/slab.h>
12 #include <linux/cpumask.h>
13 #include <linux/percpu.h>
15 #ifndef CONFIG_PPC_SUBPAGE_PROT
16 static inline void subpage_prot_free(pgd_t *pgd) {}
19 extern struct kmem_cache *pgtable_cache[];
21 #define PGD_CACHE_NUM 0
22 #define PUD_CACHE_NUM 1
23 #define PMD_CACHE_NUM 1
24 #define HUGEPTE_CACHE_NUM 2
25 #define PTE_NONCACHE_NUM 7 /* from GFP rather than kmem_cache */
27 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
29 return kmem_cache_alloc(pgtable_cache[PGD_CACHE_NUM], GFP_KERNEL);
32 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
34 subpage_prot_free(pgd);
35 kmem_cache_free(pgtable_cache[PGD_CACHE_NUM], pgd);
38 #ifndef CONFIG_PPC_64K_PAGES
40 #define pgd_populate(MM, PGD, PUD) pgd_set(PGD, PUD)
42 static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
44 return kmem_cache_alloc(pgtable_cache[PUD_CACHE_NUM],
45 GFP_KERNEL|__GFP_REPEAT);
48 static inline void pud_free(struct mm_struct *mm, pud_t *pud)
50 kmem_cache_free(pgtable_cache[PUD_CACHE_NUM], pud);
53 static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
55 pud_set(pud, (unsigned long)pmd);
58 #define pmd_populate(mm, pmd, pte_page) \
59 pmd_populate_kernel(mm, pmd, page_address(pte_page))
60 #define pmd_populate_kernel(mm, pmd, pte) pmd_set(pmd, (unsigned long)(pte))
61 #define pmd_pgtable(pmd) pmd_page(pmd)
64 #else /* CONFIG_PPC_64K_PAGES */
66 #define pud_populate(mm, pud, pmd) pud_set(pud, (unsigned long)pmd)
68 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
71 pmd_set(pmd, (unsigned long)pte);
74 #define pmd_populate(mm, pmd, pte_page) \
75 pmd_populate_kernel(mm, pmd, page_address(pte_page))
76 #define pmd_pgtable(pmd) pmd_page(pmd)
78 #endif /* CONFIG_PPC_64K_PAGES */
80 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
82 return kmem_cache_alloc(pgtable_cache[PMD_CACHE_NUM],
83 GFP_KERNEL|__GFP_REPEAT);
86 static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
88 kmem_cache_free(pgtable_cache[PMD_CACHE_NUM], pmd);
91 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
92 unsigned long address)
94 return (pte_t *)__get_free_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO);
97 static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
98 unsigned long address)
103 pte = pte_alloc_one_kernel(mm, address);
106 page = virt_to_page(pte);
107 pgtable_page_ctor(page);
111 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
113 free_page((unsigned long)pte);
116 static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage)
118 pgtable_page_dtor(ptepage);
119 __free_page(ptepage);
122 #define PGF_CACHENUM_MASK 0x7
124 typedef struct pgtable_free {
128 static inline pgtable_free_t pgtable_free_cache(void *p, int cachenum,
131 BUG_ON(cachenum > PGF_CACHENUM_MASK);
133 return (pgtable_free_t){.val = ((unsigned long) p & ~mask) | cachenum};
136 static inline void pgtable_free(pgtable_free_t pgf)
138 void *p = (void *)(pgf.val & ~PGF_CACHENUM_MASK);
139 int cachenum = pgf.val & PGF_CACHENUM_MASK;
141 if (cachenum == PTE_NONCACHE_NUM)
142 free_page((unsigned long)p);
144 kmem_cache_free(pgtable_cache[cachenum], p);
147 extern void pgtable_free_tlb(struct mmu_gather *tlb, pgtable_free_t pgf);
149 #define __pte_free_tlb(tlb,ptepage) \
151 pgtable_page_dtor(ptepage); \
152 pgtable_free_tlb(tlb, pgtable_free_cache(page_address(ptepage), \
153 PTE_NONCACHE_NUM, PTE_TABLE_SIZE-1)); \
155 #define __pmd_free_tlb(tlb, pmd) \
156 pgtable_free_tlb(tlb, pgtable_free_cache(pmd, \
157 PMD_CACHE_NUM, PMD_TABLE_SIZE-1))
158 #ifndef CONFIG_PPC_64K_PAGES
159 #define __pud_free_tlb(tlb, pud) \
160 pgtable_free_tlb(tlb, pgtable_free_cache(pud, \
161 PUD_CACHE_NUM, PUD_TABLE_SIZE-1))
162 #endif /* CONFIG_PPC_64K_PAGES */
164 #define check_pgt_cache() do { } while (0)
166 #endif /* _ASM_POWERPC_PGALLOC_64_H */