1 #ifndef _ASM_POWERPC_BOOK3S_32_PGALLOC_H
2 #define _ASM_POWERPC_BOOK3S_32_PGALLOC_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 pgtable_page_dtor(table);
106 pgtable_free_tlb(tlb, page_address(table), 0);
108 #endif /* _ASM_POWERPC_BOOK3S_32_PGALLOC_H */