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 #define __HAVE_ARCH_PMD_ALLOC_ONE 17 #define __HAVE_ARCH_PUD_ALLOC_ONE 18 #include <asm-generic/pgalloc.h> 19 20 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, 21 pte_t *pte) 22 { 23 set_pmd(pmd, __pmd((unsigned long)pte)); 24 } 25 26 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, 27 pgtable_t pte) 28 { 29 set_pmd(pmd, __pmd((unsigned long)page_address(pte))); 30 } 31 32 /* 33 * Initialize a new pmd table with invalid pointers. 34 */ 35 extern void pmd_init(void *addr); 36 37 #ifndef __PAGETABLE_PMD_FOLDED 38 39 static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) 40 { 41 set_pud(pud, __pud((unsigned long)pmd)); 42 } 43 #endif 44 45 /* 46 * Initialize a new pgd table with invalid pointers. 47 */ 48 extern void pgd_init(void *addr); 49 extern pgd_t *pgd_alloc(struct mm_struct *mm); 50 51 #define __pte_free_tlb(tlb, pte, address) \ 52 tlb_remove_ptdesc((tlb), page_ptdesc(pte)) 53 54 #ifndef __PAGETABLE_PMD_FOLDED 55 56 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address) 57 { 58 pmd_t *pmd; 59 struct ptdesc *ptdesc; 60 61 ptdesc = pagetable_alloc(GFP_KERNEL_ACCOUNT, PMD_TABLE_ORDER); 62 if (!ptdesc) 63 return NULL; 64 65 if (!pagetable_pmd_ctor(mm, ptdesc)) { 66 pagetable_free(ptdesc); 67 return NULL; 68 } 69 70 pmd = ptdesc_address(ptdesc); 71 pmd_init(pmd); 72 return pmd; 73 } 74 75 #define __pmd_free_tlb(tlb, x, addr) pmd_free((tlb)->mm, x) 76 77 #endif 78 79 #ifndef __PAGETABLE_PUD_FOLDED 80 81 static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address) 82 { 83 pud_t *pud; 84 struct ptdesc *ptdesc = pagetable_alloc(GFP_KERNEL & ~__GFP_HIGHMEM, 85 PUD_TABLE_ORDER); 86 87 if (!ptdesc) 88 return NULL; 89 pagetable_pud_ctor(ptdesc); 90 pud = ptdesc_address(ptdesc); 91 92 pud_init(pud); 93 return pud; 94 } 95 96 static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4d, pud_t *pud) 97 { 98 set_p4d(p4d, __p4d((unsigned long)pud)); 99 } 100 101 #define __pud_free_tlb(tlb, x, addr) pud_free((tlb)->mm, x) 102 103 #endif /* __PAGETABLE_PUD_FOLDED */ 104 105 extern void pagetable_init(void); 106 107 #endif /* _ASM_PGALLOC_H */ 108