1 #ifndef _ASM_POWERPC_PGALLOC_H
2 #define _ASM_POWERPC_PGALLOC_H
6 #include <asm-ppc/pgalloc.h>
10 #include <linux/slab.h>
11 #include <linux/cpumask.h>
12 #include <linux/percpu.h>
14 extern kmem_cache_t *pgtable_cache[];
16 #ifdef CONFIG_PPC_64K_PAGES
17 #define PTE_CACHE_NUM 0
18 #define PMD_CACHE_NUM 1
19 #define PGD_CACHE_NUM 2
20 #define HUGEPTE_CACHE_NUM 3
22 #define PTE_CACHE_NUM 0
23 #define PMD_CACHE_NUM 1
24 #define PUD_CACHE_NUM 1
25 #define PGD_CACHE_NUM 0
26 #define HUGEPTE_CACHE_NUM 2
30 * This program is free software; you can redistribute it and/or
31 * modify it under the terms of the GNU General Public License
32 * as published by the Free Software Foundation; either version
33 * 2 of the License, or (at your option) any later version.
36 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
38 return kmem_cache_alloc(pgtable_cache[PGD_CACHE_NUM], GFP_KERNEL);
41 static inline void pgd_free(pgd_t *pgd)
43 kmem_cache_free(pgtable_cache[PGD_CACHE_NUM], pgd);
46 #ifndef CONFIG_PPC_64K_PAGES
48 #define pgd_populate(MM, PGD, PUD) pgd_set(PGD, PUD)
50 static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
52 return kmem_cache_alloc(pgtable_cache[PUD_CACHE_NUM],
53 GFP_KERNEL|__GFP_REPEAT);
56 static inline void pud_free(pud_t *pud)
58 kmem_cache_free(pgtable_cache[PUD_CACHE_NUM], pud);
61 static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
63 pud_set(pud, (unsigned long)pmd);
66 #define pmd_populate(mm, pmd, pte_page) \
67 pmd_populate_kernel(mm, pmd, page_address(pte_page))
68 #define pmd_populate_kernel(mm, pmd, pte) pmd_set(pmd, (unsigned long)(pte))
71 #else /* CONFIG_PPC_64K_PAGES */
73 #define pud_populate(mm, pud, pmd) pud_set(pud, (unsigned long)pmd)
75 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
78 pmd_set(pmd, (unsigned long)pte);
81 #define pmd_populate(mm, pmd, pte_page) \
82 pmd_populate_kernel(mm, pmd, page_address(pte_page))
84 #endif /* CONFIG_PPC_64K_PAGES */
86 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
88 return kmem_cache_alloc(pgtable_cache[PMD_CACHE_NUM],
89 GFP_KERNEL|__GFP_REPEAT);
92 static inline void pmd_free(pmd_t *pmd)
94 kmem_cache_free(pgtable_cache[PMD_CACHE_NUM], pmd);
97 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
98 unsigned long address)
100 return kmem_cache_alloc(pgtable_cache[PTE_CACHE_NUM],
101 GFP_KERNEL|__GFP_REPEAT);
104 static inline struct page *pte_alloc_one(struct mm_struct *mm,
105 unsigned long address)
107 return virt_to_page(pte_alloc_one_kernel(mm, address));
110 static inline void pte_free_kernel(pte_t *pte)
112 kmem_cache_free(pgtable_cache[PTE_CACHE_NUM], pte);
115 static inline void pte_free(struct page *ptepage)
117 pte_free_kernel(page_address(ptepage));
120 #define PGF_CACHENUM_MASK 0xf
122 typedef struct pgtable_free {
126 static inline pgtable_free_t pgtable_free_cache(void *p, int cachenum,
129 BUG_ON(cachenum > PGF_CACHENUM_MASK);
131 return (pgtable_free_t){.val = ((unsigned long) p & ~mask) | cachenum};
134 static inline void pgtable_free(pgtable_free_t pgf)
136 void *p = (void *)(pgf.val & ~PGF_CACHENUM_MASK);
137 int cachenum = pgf.val & PGF_CACHENUM_MASK;
139 kmem_cache_free(pgtable_cache[cachenum], p);
142 extern void pgtable_free_tlb(struct mmu_gather *tlb, pgtable_free_t pgf);
144 #define __pte_free_tlb(tlb, ptepage) \
145 pgtable_free_tlb(tlb, pgtable_free_cache(page_address(ptepage), \
146 PTE_CACHE_NUM, PTE_TABLE_SIZE-1))
147 #define __pmd_free_tlb(tlb, pmd) \
148 pgtable_free_tlb(tlb, pgtable_free_cache(pmd, \
149 PMD_CACHE_NUM, PMD_TABLE_SIZE-1))
150 #ifndef CONFIG_PPC_64K_PAGES
151 #define __pud_free_tlb(tlb, pud) \
152 pgtable_free_tlb(tlb, pgtable_free_cache(pud, \
153 PUD_CACHE_NUM, PUD_TABLE_SIZE-1))
154 #endif /* CONFIG_PPC_64K_PAGES */
156 #define check_pgt_cache() do { } while (0)
158 #endif /* CONFIG_PPC64 */
159 #endif /* __KERNEL__ */
160 #endif /* _ASM_POWERPC_PGALLOC_H */