2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * Copyright (C) 1994 - 2001, 2003 by Ralf Baechle
7 * Copyright (C) 1999, 2000, 2001 Silicon Graphics, Inc.
10 #define _ASM_PGALLOC_H
12 #include <linux/highmem.h>
14 #include <linux/sched.h>
16 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
19 set_pmd(pmd, __pmd((unsigned long)pte));
22 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
25 set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
27 #define pmd_pgtable(pmd) pmd_page(pmd)
30 * Initialize a new pmd table with invalid pointers.
32 extern void pmd_init(unsigned long page, unsigned long pagetable);
34 #ifndef __PAGETABLE_PMD_FOLDED
36 static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
38 set_pud(pud, __pud((unsigned long)pmd));
43 * Initialize a new pgd / pmd table with invalid pointers.
45 extern void pgd_init(unsigned long page);
46 extern pgd_t *pgd_alloc(struct mm_struct *mm);
48 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
50 free_pages((unsigned long)pgd, PGD_ORDER);
53 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
54 unsigned long address)
56 return (pte_t *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, PTE_ORDER);
59 static inline struct page *pte_alloc_one(struct mm_struct *mm,
60 unsigned long address)
64 pte = alloc_pages(GFP_KERNEL, PTE_ORDER);
68 if (!pgtable_page_ctor(pte)) {
75 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
77 free_pages((unsigned long)pte, PTE_ORDER);
80 static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
82 pgtable_page_dtor(pte);
83 __free_pages(pte, PTE_ORDER);
86 #define __pte_free_tlb(tlb,pte,address) \
88 pgtable_page_dtor(pte); \
89 tlb_remove_page((tlb), pte); \
92 #ifndef __PAGETABLE_PMD_FOLDED
94 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
98 pmd = (pmd_t *) __get_free_pages(GFP_KERNEL, PMD_ORDER);
100 pmd_init((unsigned long)pmd, (unsigned long)invalid_pte_table);
104 static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
106 free_pages((unsigned long)pmd, PMD_ORDER);
109 #define __pmd_free_tlb(tlb, x, addr) pmd_free((tlb)->mm, x)
113 #ifndef __PAGETABLE_PUD_FOLDED
115 static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address)
119 pud = (pud_t *) __get_free_pages(GFP_KERNEL, PUD_ORDER);
121 pud_init((unsigned long)pud, (unsigned long)invalid_pmd_table);
125 static inline void pud_free(struct mm_struct *mm, pud_t *pud)
127 free_pages((unsigned long)pud, PUD_ORDER);
130 static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud)
132 set_pgd(pgd, __pgd((unsigned long)pud));
135 #define __pud_free_tlb(tlb, x, addr) pud_free((tlb)->mm, x)
137 #endif /* __PAGETABLE_PUD_FOLDED */
139 #define check_pgt_cache() do { } while (0)
141 extern void pagetable_init(void);
143 #endif /* _ASM_PGALLOC_H */