]>
git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - include/asm-powerpc/pgalloc-64.h
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 3 /* 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))
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))
76 #endif /* CONFIG_PPC_64K_PAGES */
78 static inline pmd_t
*pmd_alloc_one(struct mm_struct
*mm
, unsigned long addr
)
80 return kmem_cache_alloc(pgtable_cache
[PMD_CACHE_NUM
],
81 GFP_KERNEL
|__GFP_REPEAT
);
84 static inline void pmd_free(struct mm_struct
*mm
, pmd_t
*pmd
)
86 kmem_cache_free(pgtable_cache
[PMD_CACHE_NUM
], pmd
);
89 static inline pte_t
*pte_alloc_one_kernel(struct mm_struct
*mm
,
90 unsigned long address
)
92 return (pte_t
*)__get_free_page(GFP_KERNEL
| __GFP_REPEAT
| __GFP_ZERO
);
95 static inline struct page
*pte_alloc_one(struct mm_struct
*mm
,
96 unsigned long address
)
98 pte_t
*pte
= pte_alloc_one_kernel(mm
, address
);
99 return pte
? virt_to_page(pte
) : NULL
;
102 static inline void pte_free_kernel(struct mm_struct
*mm
, pte_t
*pte
)
104 free_page((unsigned long)pte
);
107 static inline void pte_free(struct mm_struct
*mm
, struct page
*ptepage
)
109 __free_page(ptepage
);
112 #define PGF_CACHENUM_MASK 0x3
114 typedef struct pgtable_free
{
118 static inline pgtable_free_t
pgtable_free_cache(void *p
, int cachenum
,
121 BUG_ON(cachenum
> PGF_CACHENUM_MASK
);
123 return (pgtable_free_t
){.val
= ((unsigned long) p
& ~mask
) | cachenum
};
126 static inline void pgtable_free(pgtable_free_t pgf
)
128 void *p
= (void *)(pgf
.val
& ~PGF_CACHENUM_MASK
);
129 int cachenum
= pgf
.val
& PGF_CACHENUM_MASK
;
131 if (cachenum
== PTE_NONCACHE_NUM
)
132 free_page((unsigned long)p
);
134 kmem_cache_free(pgtable_cache
[cachenum
], p
);
137 extern void pgtable_free_tlb(struct mmu_gather
*tlb
, pgtable_free_t pgf
);
139 #define __pte_free_tlb(tlb, ptepage) \
140 pgtable_free_tlb(tlb, pgtable_free_cache(page_address(ptepage), \
141 PTE_NONCACHE_NUM, PTE_TABLE_SIZE-1))
142 #define __pmd_free_tlb(tlb, pmd) \
143 pgtable_free_tlb(tlb, pgtable_free_cache(pmd, \
144 PMD_CACHE_NUM, PMD_TABLE_SIZE-1))
145 #ifndef CONFIG_PPC_64K_PAGES
146 #define __pud_free_tlb(tlb, pud) \
147 pgtable_free_tlb(tlb, pgtable_free_cache(pud, \
148 PUD_CACHE_NUM, PUD_TABLE_SIZE-1))
149 #endif /* CONFIG_PPC_64K_PAGES */
151 #define check_pgt_cache() do { } while (0)
153 #endif /* _ASM_POWERPC_PGALLOC_64_H */