1 #ifndef _ASM_POWERPC_PGALLOC_H
2 #define _ASM_POWERPC_PGALLOC_H
5 #include <asm-ppc/pgalloc.h>
9 #include <linux/slab.h>
10 #include <linux/cpumask.h>
11 #include <linux/percpu.h>
13 extern kmem_cache_t *pgtable_cache[];
15 #ifdef CONFIG_PPC_64K_PAGES
16 #define PTE_CACHE_NUM 0
17 #define PMD_CACHE_NUM 1
18 #define PGD_CACHE_NUM 2
20 #define PTE_CACHE_NUM 0
21 #define PMD_CACHE_NUM 1
22 #define PUD_CACHE_NUM 1
23 #define PGD_CACHE_NUM 0
27 * This program is free software; you can redistribute it and/or
28 * modify it under the terms of the GNU General Public License
29 * as published by the Free Software Foundation; either version
30 * 2 of the License, or (at your option) any later version.
33 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
35 return kmem_cache_alloc(pgtable_cache[PGD_CACHE_NUM], GFP_KERNEL);
38 static inline void pgd_free(pgd_t *pgd)
40 kmem_cache_free(pgtable_cache[PGD_CACHE_NUM], pgd);
43 #ifndef CONFIG_PPC_64K_PAGES
45 #define pgd_populate(MM, PGD, PUD) pgd_set(PGD, PUD)
47 static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
49 return kmem_cache_alloc(pgtable_cache[PUD_CACHE_NUM],
50 GFP_KERNEL|__GFP_REPEAT);
53 static inline void pud_free(pud_t *pud)
55 kmem_cache_free(pgtable_cache[PUD_CACHE_NUM], pud);
58 static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
60 pud_set(pud, (unsigned long)pmd);
63 #define pmd_populate(mm, pmd, pte_page) \
64 pmd_populate_kernel(mm, pmd, page_address(pte_page))
65 #define pmd_populate_kernel(mm, pmd, pte) pmd_set(pmd, (unsigned long)(pte))
68 #else /* CONFIG_PPC_64K_PAGES */
70 #define pud_populate(mm, pud, pmd) pud_set(pud, (unsigned long)pmd)
72 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
75 pmd_set(pmd, (unsigned long)pte);
78 #define pmd_populate(mm, pmd, pte_page) \
79 pmd_populate_kernel(mm, pmd, page_address(pte_page))
81 #endif /* CONFIG_PPC_64K_PAGES */
83 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
85 return kmem_cache_alloc(pgtable_cache[PMD_CACHE_NUM],
86 GFP_KERNEL|__GFP_REPEAT);
89 static inline void pmd_free(pmd_t *pmd)
91 kmem_cache_free(pgtable_cache[PMD_CACHE_NUM], pmd);
94 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
95 unsigned long address)
97 return kmem_cache_alloc(pgtable_cache[PTE_CACHE_NUM],
98 GFP_KERNEL|__GFP_REPEAT);
101 static inline struct page *pte_alloc_one(struct mm_struct *mm,
102 unsigned long address)
104 return virt_to_page(pte_alloc_one_kernel(mm, address));
107 static inline void pte_free_kernel(pte_t *pte)
109 kmem_cache_free(pgtable_cache[PTE_CACHE_NUM], pte);
112 static inline void pte_free(struct page *ptepage)
114 pte_free_kernel(page_address(ptepage));
117 #define PGF_CACHENUM_MASK 0xf
119 typedef struct pgtable_free {
123 static inline pgtable_free_t pgtable_free_cache(void *p, int cachenum,
126 BUG_ON(cachenum > PGF_CACHENUM_MASK);
128 return (pgtable_free_t){.val = ((unsigned long) p & ~mask) | cachenum};
131 static inline void pgtable_free(pgtable_free_t pgf)
133 void *p = (void *)(pgf.val & ~PGF_CACHENUM_MASK);
134 int cachenum = pgf.val & PGF_CACHENUM_MASK;
136 kmem_cache_free(pgtable_cache[cachenum], p);
139 extern void pgtable_free_tlb(struct mmu_gather *tlb, pgtable_free_t pgf);
141 #define __pte_free_tlb(tlb, ptepage) \
142 pgtable_free_tlb(tlb, pgtable_free_cache(page_address(ptepage), \
143 PTE_CACHE_NUM, PTE_TABLE_SIZE-1))
144 #define __pmd_free_tlb(tlb, pmd) \
145 pgtable_free_tlb(tlb, pgtable_free_cache(pmd, \
146 PMD_CACHE_NUM, PMD_TABLE_SIZE-1))
147 #ifndef CONFIG_PPC_64K_PAGES
148 #define __pud_free_tlb(tlb, pmd) \
149 pgtable_free_tlb(tlb, pgtable_free_cache(pud, \
150 PUD_CACHE_NUM, PUD_TABLE_SIZE-1))
151 #endif /* CONFIG_PPC_64K_PAGES */
153 #define check_pgt_cache() do { } while (0)
155 #endif /* CONFIG_PPC64 */
156 #endif /* _ASM_POWERPC_PGALLOC_H */