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.
10 #include <linux/slab.h>
11 #include <linux/cpumask.h>
12 #include <linux/percpu.h>
14 #ifndef CONFIG_PPC_SUBPAGE_PROT
15 static inline void subpage_prot_free(pgd_t *pgd) {}
18 extern struct kmem_cache *pgtable_cache[];
20 #define PGD_CACHE_NUM 0
21 #define PUD_CACHE_NUM 1
22 #define PMD_CACHE_NUM 1
23 #define HUGEPTE_CACHE_NUM 2
24 #define PTE_NONCACHE_NUM 7 /* from GFP rather than kmem_cache */
26 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
28 return kmem_cache_alloc(pgtable_cache[PGD_CACHE_NUM], GFP_KERNEL);
31 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
33 subpage_prot_free(pgd);
34 kmem_cache_free(pgtable_cache[PGD_CACHE_NUM], pgd);
37 #ifndef CONFIG_PPC_64K_PAGES
39 #define pgd_populate(MM, PGD, PUD) pgd_set(PGD, PUD)
41 static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
43 return kmem_cache_alloc(pgtable_cache[PUD_CACHE_NUM],
44 GFP_KERNEL|__GFP_REPEAT);
47 static inline void pud_free(struct mm_struct *mm, pud_t *pud)
49 kmem_cache_free(pgtable_cache[PUD_CACHE_NUM], pud);
52 static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
54 pud_set(pud, (unsigned long)pmd);
57 #define pmd_populate(mm, pmd, pte_page) \
58 pmd_populate_kernel(mm, pmd, page_address(pte_page))
59 #define pmd_populate_kernel(mm, pmd, pte) pmd_set(pmd, (unsigned long)(pte))
60 #define pmd_pgtable(pmd) pmd_page(pmd)
63 #else /* CONFIG_PPC_64K_PAGES */
65 #define pud_populate(mm, pud, pmd) pud_set(pud, (unsigned long)pmd)
67 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
70 pmd_set(pmd, (unsigned long)pte);
73 #define pmd_populate(mm, pmd, pte_page) \
74 pmd_populate_kernel(mm, pmd, page_address(pte_page))
75 #define pmd_pgtable(pmd) pmd_page(pmd)
77 #endif /* CONFIG_PPC_64K_PAGES */
79 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
81 return kmem_cache_alloc(pgtable_cache[PMD_CACHE_NUM],
82 GFP_KERNEL|__GFP_REPEAT);
85 static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
87 kmem_cache_free(pgtable_cache[PMD_CACHE_NUM], pmd);
90 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
91 unsigned long address)
93 return (pte_t *)__get_free_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO);
96 static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
97 unsigned long address)
102 pte = pte_alloc_one_kernel(mm, address);
105 page = virt_to_page(pte);
106 pgtable_page_ctor(page);
110 static inline void pgtable_free(pgtable_free_t pgf)
112 void *p = (void *)(pgf.val & ~PGF_CACHENUM_MASK);
113 int cachenum = pgf.val & PGF_CACHENUM_MASK;
115 if (cachenum == PTE_NONCACHE_NUM)
116 free_page((unsigned long)p);
118 kmem_cache_free(pgtable_cache[cachenum], p);
121 #define __pmd_free_tlb(tlb, pmd,addr) \
122 pgtable_free_tlb(tlb, pgtable_free_cache(pmd, \
123 PMD_CACHE_NUM, PMD_TABLE_SIZE-1))
124 #ifndef CONFIG_PPC_64K_PAGES
125 #define __pud_free_tlb(tlb, pud, addr) \
126 pgtable_free_tlb(tlb, pgtable_free_cache(pud, \
127 PUD_CACHE_NUM, PUD_TABLE_SIZE-1))
128 #endif /* CONFIG_PPC_64K_PAGES */
130 #define check_pgt_cache() do { } while (0)
132 #endif /* _ASM_POWERPC_PGALLOC_64_H */