1 #ifndef _ASM_POWERPC_PGALLOC_32_H
2 #define _ASM_POWERPC_PGALLOC_32_H
3
4 #include <linux/threads.h>
5
6 /* For 32-bit, all levels of page tables are just drawn from get_free_page() */
7 #define MAX_PGTABLE_INDEX_SIZE 0
8
9 extern void __bad_pte(pmd_t *pmd);
10
11 extern pgd_t *pgd_alloc(struct mm_struct *mm);
12 extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
13
14 /*
15 * We don't have any real pmd's, and this code never triggers because
16 * the pgd will always be present..
17 */
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() */
22
23 #ifndef CONFIG_BOOKE
24 #define pmd_populate_kernel(mm, pmd, pte) \
25 (pmd_val(*(pmd)) = __pa(pte) | _PMD_PRESENT)
26 #define pmd_populate(mm, pmd, pte) \
27 (pmd_val(*(pmd)) = (page_to_pfn(pte) << PAGE_SHIFT) | _PMD_PRESENT)
28 #define pmd_pgtable(pmd) pmd_page(pmd)
29 #else
30 #define pmd_populate_kernel(mm, pmd, pte) \
31 (pmd_val(*(pmd)) = (unsigned long)pte | _PMD_PRESENT)
32 #define pmd_populate(mm, pmd, pte) \
33 (pmd_val(*(pmd)) = (unsigned long)lowmem_page_address(pte) | _PMD_PRESENT)
34 #define pmd_pgtable(pmd) pmd_page(pmd)
35 #endif
36
37 extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr);
38 extern pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long addr);
39
pgtable_free(void * table,unsigned index_size)40 static inline void pgtable_free(void *table, unsigned index_size)
41 {
42 BUG_ON(index_size); /* 32-bit doesn't use this */
43 free_page((unsigned long)table);
44 }
45
46 #define check_pgt_cache() do { } while (0)
47
48 #endif /* _ASM_POWERPC_PGALLOC_32_H */
49