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 #include <asm-generic/pgalloc.h> /* for pte_{alloc,free}_one */
18 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
21 set_pmd(pmd, __pmd((unsigned long)pte));
24 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
27 set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
29 #define pmd_pgtable(pmd) pmd_page(pmd)
32 * Initialize a new pmd table with invalid pointers.
34 extern void pmd_init(unsigned long page, unsigned long pagetable);
36 #ifndef __PAGETABLE_PMD_FOLDED
38 static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
40 set_pud(pud, __pud((unsigned long)pmd));
45 * Initialize a new pgd / pmd table with invalid pointers.
47 extern void pgd_init(unsigned long page);
48 extern pgd_t *pgd_alloc(struct mm_struct *mm);
50 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
52 free_pages((unsigned long)pgd, PGD_ORDER);
55 #define __pte_free_tlb(tlb,pte,address) \
57 pgtable_pte_page_dtor(pte); \
58 tlb_remove_page((tlb), pte); \
61 #ifndef __PAGETABLE_PMD_FOLDED
63 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
67 pmd = (pmd_t *) __get_free_pages(GFP_KERNEL, PMD_ORDER);
69 pmd_init((unsigned long)pmd, (unsigned long)invalid_pte_table);
73 static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
75 free_pages((unsigned long)pmd, PMD_ORDER);
78 #define __pmd_free_tlb(tlb, x, addr) pmd_free((tlb)->mm, x)
82 #ifndef __PAGETABLE_PUD_FOLDED
84 static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address)
88 pud = (pud_t *) __get_free_pages(GFP_KERNEL, PUD_ORDER);
90 pud_init((unsigned long)pud, (unsigned long)invalid_pmd_table);
94 static inline void pud_free(struct mm_struct *mm, pud_t *pud)
96 free_pages((unsigned long)pud, PUD_ORDER);
99 static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud)
101 set_pgd(pgd, __pgd((unsigned long)pud));
104 #define __pud_free_tlb(tlb, x, addr) pud_free((tlb)->mm, x)
106 #endif /* __PAGETABLE_PUD_FOLDED */
108 extern void pagetable_init(void);
110 #endif /* _ASM_PGALLOC_H */