1 /* 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 4 * for more details. 5 * 6 * Copyright (C) 1994 - 2001, 2003 by Ralf Baechle 7 * Copyright (C) 1999, 2000, 2001 Silicon Graphics, Inc. 8 */ 9 #ifndef _ASM_PGALLOC_H 10 #define _ASM_PGALLOC_H 11 12 #include <linux/highmem.h> 13 #include <linux/mm.h> 14 #include <linux/sched.h> 15 16 #include <asm-generic/pgalloc.h> /* for pte_{alloc,free}_one */ 17 18 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, 19 pte_t *pte) 20 { 21 set_pmd(pmd, __pmd((unsigned long)pte)); 22 } 23 24 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, 25 pgtable_t pte) 26 { 27 set_pmd(pmd, __pmd((unsigned long)page_address(pte))); 28 } 29 #define pmd_pgtable(pmd) pmd_page(pmd) 30 31 /* 32 * Initialize a new pmd table with invalid pointers. 33 */ 34 extern void pmd_init(unsigned long page, unsigned long pagetable); 35 36 #ifndef __PAGETABLE_PMD_FOLDED 37 38 static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) 39 { 40 set_pud(pud, __pud((unsigned long)pmd)); 41 } 42 #endif 43 44 /* 45 * Initialize a new pgd / pmd table with invalid pointers. 46 */ 47 extern void pgd_init(unsigned long page); 48 extern pgd_t *pgd_alloc(struct mm_struct *mm); 49 50 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) 51 { 52 free_pages((unsigned long)pgd, PGD_ORDER); 53 } 54 55 #define __pte_free_tlb(tlb,pte,address) \ 56 do { \ 57 pgtable_pte_page_dtor(pte); \ 58 tlb_remove_page((tlb), pte); \ 59 } while (0) 60 61 #ifndef __PAGETABLE_PMD_FOLDED 62 63 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address) 64 { 65 pmd_t *pmd; 66 67 pmd = (pmd_t *) __get_free_pages(GFP_KERNEL, PMD_ORDER); 68 if (pmd) 69 pmd_init((unsigned long)pmd, (unsigned long)invalid_pte_table); 70 return pmd; 71 } 72 73 static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) 74 { 75 free_pages((unsigned long)pmd, PMD_ORDER); 76 } 77 78 #define __pmd_free_tlb(tlb, x, addr) pmd_free((tlb)->mm, x) 79 80 #endif 81 82 #ifndef __PAGETABLE_PUD_FOLDED 83 84 static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address) 85 { 86 pud_t *pud; 87 88 pud = (pud_t *) __get_free_pages(GFP_KERNEL, PUD_ORDER); 89 if (pud) 90 pud_init((unsigned long)pud, (unsigned long)invalid_pmd_table); 91 return pud; 92 } 93 94 static inline void pud_free(struct mm_struct *mm, pud_t *pud) 95 { 96 free_pages((unsigned long)pud, PUD_ORDER); 97 } 98 99 static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4d, pud_t *pud) 100 { 101 set_p4d(p4d, __p4d((unsigned long)pud)); 102 } 103 104 #define __pud_free_tlb(tlb, x, addr) pud_free((tlb)->mm, x) 105 106 #endif /* __PAGETABLE_PUD_FOLDED */ 107 108 extern void pagetable_init(void); 109 110 #endif /* _ASM_PGALLOC_H */ 111