blob: 842846c1b71185b1a5e086e8521ed65342ae9cb0 [file] [log] [blame]
David Gibsonf88df142007-04-30 16:30:56 +10001#ifndef _ASM_POWERPC_PGALLOC_32_H
2#define _ASM_POWERPC_PGALLOC_32_H
3
4#include <linux/threads.h>
5
David Gibsona0668cd2009-10-28 16:27:18 +00006/* For 32-bit, all levels of page tables are just drawn from get_free_page() */
7#define MAX_PGTABLE_INDEX_SIZE 0
Kumar Gala0186f472008-11-19 12:50:04 +00008
David Gibsonf88df142007-04-30 16:30:56 +10009extern void __bad_pte(pmd_t *pmd);
10
11extern pgd_t *pgd_alloc(struct mm_struct *mm);
Benjamin Herrenschmidt5e541972008-02-04 22:29:14 -080012extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
David Gibsonf88df142007-04-30 16:30:56 +100013
14/*
15 * We don't have any real pmd's, and this code never triggers because
16 * the pgd will always be present..
17 */
David Gibsond1953c82007-05-08 12:46:49 +100018/* #define pmd_alloc_one(mm,address) ({ BUG(); ((pmd_t *)2); }) */
Benjamin Herrenschmidt5e541972008-02-04 22:29:14 -080019#define pmd_free(mm, x) do { } while (0)
Benjamin Herrenschmidt9e1b32c2009-07-22 15:44:28 +100020#define __pmd_free_tlb(tlb,x,a) do { } while (0)
David Gibsond1953c82007-05-08 12:46:49 +100021/* #define pgd_populate(mm, pmd, pte) BUG() */
David Gibsonf88df142007-04-30 16:30:56 +100022
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)
Martin Schwidefsky2f569af2008-02-08 04:22:04 -080028#define pmd_pgtable(pmd) pmd_page(pmd)
David Gibsonf88df142007-04-30 16:30:56 +100029#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)
Martin Schwidefsky2f569af2008-02-08 04:22:04 -080034#define pmd_pgtable(pmd) pmd_page(pmd)
David Gibsonf88df142007-04-30 16:30:56 +100035#endif
36
37extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr);
Martin Schwidefsky2f569af2008-02-08 04:22:04 -080038extern pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long addr);
David Gibsonf88df142007-04-30 16:30:56 +100039
Aneesh Kumar K.Vd614bb02013-04-28 09:37:32 +000040static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
41{
42 free_page((unsigned long)pte);
43}
44
45static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage)
46{
47 pgtable_page_dtor(ptepage);
48 __free_page(ptepage);
49}
50
David Gibsona0668cd2009-10-28 16:27:18 +000051static inline void pgtable_free(void *table, unsigned index_size)
Kumar Gala0186f472008-11-19 12:50:04 +000052{
David Gibsona0668cd2009-10-28 16:27:18 +000053 BUG_ON(index_size); /* 32-bit doesn't use this */
54 free_page((unsigned long)table);
Kumar Gala0186f472008-11-19 12:50:04 +000055}
David Gibsonf88df142007-04-30 16:30:56 +100056
57#define check_pgt_cache() do { } while (0)
58
Aneesh Kumar K.Vd614bb02013-04-28 09:37:32 +000059#ifdef CONFIG_SMP
60static 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
69static 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
77static inline void pgtable_free_tlb(struct mmu_gather *tlb,
78 void *table, int shift)
79{
80 pgtable_free(table, shift);
81}
82#endif
83
84static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table,
85 unsigned long address)
86{
Aneesh Kumar K.Vd614bb02013-04-28 09:37:32 +000087 tlb_flush_pgtable(tlb, address);
Hong H. Phamcf77ee52013-12-07 09:06:33 -050088 pgtable_page_dtor(table);
89 pgtable_free_tlb(tlb, page_address(table), 0);
Aneesh Kumar K.Vd614bb02013-04-28 09:37:32 +000090}
David Gibsonf88df142007-04-30 16:30:56 +100091#endif /* _ASM_POWERPC_PGALLOC_32_H */