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 #define __HAVE_ARCH_PMD_ALLOC_ONE
17 #define __HAVE_ARCH_PUD_ALLOC_ONE
18 #include <asm-generic/pgalloc.h>
20 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
23 set_pmd(pmd, __pmd((unsigned long)pte));
26 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
29 set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
31 #define pmd_pgtable(pmd) pmd_page(pmd)
34 * Initialize a new pmd table with invalid pointers.
36 extern void pmd_init(unsigned long page, unsigned long pagetable);
38 #ifndef __PAGETABLE_PMD_FOLDED
40 static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
42 set_pud(pud, __pud((unsigned long)pmd));
47 * Initialize a new pgd / pmd table with invalid pointers.
49 extern void pgd_init(unsigned long page);
50 extern pgd_t *pgd_alloc(struct mm_struct *mm);
52 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
54 free_pages((unsigned long)pgd, PGD_ORDER);
57 #define __pte_free_tlb(tlb,pte,address) \
59 pgtable_pte_page_dtor(pte); \
60 tlb_remove_page((tlb), pte); \
63 #ifndef __PAGETABLE_PMD_FOLDED
65 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
69 pmd = (pmd_t *) __get_free_pages(GFP_KERNEL, PMD_ORDER);
71 pmd_init((unsigned long)pmd, (unsigned long)invalid_pte_table);
75 #define __pmd_free_tlb(tlb, x, addr) pmd_free((tlb)->mm, x)
79 #ifndef __PAGETABLE_PUD_FOLDED
81 static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address)
85 pud = (pud_t *) __get_free_pages(GFP_KERNEL, PUD_ORDER);
87 pud_init((unsigned long)pud, (unsigned long)invalid_pmd_table);
91 static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4d, pud_t *pud)
93 set_p4d(p4d, __p4d((unsigned long)pud));
96 #define __pud_free_tlb(tlb, x, addr) pud_free((tlb)->mm, x)
98 #endif /* __PAGETABLE_PUD_FOLDED */
100 extern void pagetable_init(void);
102 #endif /* _ASM_PGALLOC_H */