1 #ifndef _ASM_POWERPC_PGALLOC_32_H
2 #define _ASM_POWERPC_PGALLOC_32_H
4 #include <linux/threads.h>
6 /* For 32-bit, all levels of page tables are just drawn from get_free_page() */
7 #define MAX_PGTABLE_INDEX_SIZE 0
9 extern void __bad_pte(pmd_t
*pmd
);
11 extern pgd_t
*pgd_alloc(struct mm_struct
*mm
);
12 extern void pgd_free(struct mm_struct
*mm
, pgd_t
*pgd
);
15 * We don't have any real pmd's, and this code never triggers because
16 * the pgd will always be present..
18 /* #define pmd_alloc_one(mm,address) ({ BUG(); ((pmd_t *)2); }) */
19 #define pmd_free(mm, x) do { } while (0)
20 #define __pmd_free_tlb(tlb,x,a) do { } while (0)
21 /* #define pgd_populate(mm, pmd, pte) BUG() */
25 static inline void pmd_populate_kernel(struct mm_struct
*mm
, pmd_t
*pmdp
,
28 *pmdp
= __pmd(__pa(pte
) | _PMD_PRESENT
);
31 static inline void pmd_populate(struct mm_struct
*mm
, pmd_t
*pmdp
,
34 *pmdp
= __pmd((page_to_pfn(pte_page
) << PAGE_SHIFT
) | _PMD_PRESENT
);
37 #define pmd_pgtable(pmd) pmd_page(pmd)
40 static inline void pmd_populate_kernel(struct mm_struct
*mm
, pmd_t
*pmdp
,
43 *pmdp
= __pmd((unsigned long)pte
| _PMD_PRESENT
);
46 static inline void pmd_populate(struct mm_struct
*mm
, pmd_t
*pmdp
,
49 *pmdp
= __pmd((unsigned long)lowmem_page_address(pte_page
) | _PMD_PRESENT
);
52 #define pmd_pgtable(pmd) pmd_page(pmd)
55 extern pte_t
*pte_alloc_one_kernel(struct mm_struct
*mm
, unsigned long addr
);
56 extern pgtable_t
pte_alloc_one(struct mm_struct
*mm
, unsigned long addr
);
58 static inline void pte_free_kernel(struct mm_struct
*mm
, pte_t
*pte
)
60 free_page((unsigned long)pte
);
63 static inline void pte_free(struct mm_struct
*mm
, pgtable_t ptepage
)
65 pgtable_page_dtor(ptepage
);
69 static inline void pgtable_free(void *table
, unsigned index_size
)
71 BUG_ON(index_size
); /* 32-bit doesn't use this */
72 free_page((unsigned long)table
);
75 #define check_pgt_cache() do { } while (0)
78 static inline void pgtable_free_tlb(struct mmu_gather
*tlb
,
79 void *table
, int shift
)
81 unsigned long pgf
= (unsigned long)table
;
82 BUG_ON(shift
> MAX_PGTABLE_INDEX_SIZE
);
84 tlb_remove_table(tlb
, (void *)pgf
);
87 static inline void __tlb_remove_table(void *_table
)
89 void *table
= (void *)((unsigned long)_table
& ~MAX_PGTABLE_INDEX_SIZE
);
90 unsigned shift
= (unsigned long)_table
& MAX_PGTABLE_INDEX_SIZE
;
92 pgtable_free(table
, shift
);
95 static inline void pgtable_free_tlb(struct mmu_gather
*tlb
,
96 void *table
, int shift
)
98 pgtable_free(table
, shift
);
102 static inline void __pte_free_tlb(struct mmu_gather
*tlb
, pgtable_t table
,
103 unsigned long address
)
105 tlb_flush_pgtable(tlb
, address
);
106 pgtable_page_dtor(table
);
107 pgtable_free_tlb(tlb
, page_address(table
), 0);
109 #endif /* _ASM_POWERPC_PGALLOC_32_H */
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