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
pte_free_kernel(struct mm_struct * mm,pte_t * pte)40 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
41 {
42 free_page((unsigned long)pte);
43 }
44
pte_free(struct mm_struct * mm,pgtable_t ptepage)45 static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage)
46 {
47 pgtable_page_dtor(ptepage);
48 __free_page(ptepage);
49 }
50
pgtable_free(void * table,unsigned index_size)51 static inline void pgtable_free(void *table, unsigned index_size)
52 {
53 BUG_ON(index_size); /* 32-bit doesn't use this */
54 free_page((unsigned long)table);
55 }
56
57 #define check_pgt_cache() do { } while (0)
58
59 #ifdef CONFIG_SMP
pgtable_free_tlb(struct mmu_gather * tlb,void * table,int shift)60 static inline void pgtable_free_tlb(struct mmu_gather *tlb,
61 void *table, int shift)
62 {
63 unsigned long pgf = (unsigned long)table;
64 BUG_ON(shift > MAX_PGTABLE_INDEX_SIZE);
65 pgf |= shift;
66 tlb_remove_table(tlb, (void *)pgf);
67 }
68
__tlb_remove_table(void * _table)69 static inline void __tlb_remove_table(void *_table)
70 {
71 void *table = (void *)((unsigned long)_table & ~MAX_PGTABLE_INDEX_SIZE);
72 unsigned shift = (unsigned long)_table & MAX_PGTABLE_INDEX_SIZE;
73
74 pgtable_free(table, shift);
75 }
76 #else
pgtable_free_tlb(struct mmu_gather * tlb,void * table,int shift)77 static inline void pgtable_free_tlb(struct mmu_gather *tlb,
78 void *table, int shift)
79 {
80 pgtable_free(table, shift);
81 }
82 #endif
83
__pte_free_tlb(struct mmu_gather * tlb,pgtable_t table,unsigned long address)84 static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table,
85 unsigned long address)
86 {
87 struct page *page = page_address(table);
88
89 tlb_flush_pgtable(tlb, address);
90 pgtable_page_dtor(page);
91 pgtable_free_tlb(tlb, page, 0);
92 }
93 #endif /* _ASM_POWERPC_PGALLOC_32_H */
94