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 #define pmd_pgtable(pmd) pmd_page(pmd) 32 33 /* 34 * Initialize a new pmd table with invalid pointers. 35 */ 36 extern void pmd_init(unsigned long page, unsigned long pagetable); 37 38 #ifndef __PAGETABLE_PMD_FOLDED 39 40 static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) 41 { 42 set_pud(pud, __pud((unsigned long)pmd)); 43 } 44 #endif 45 46 /* 47 * Initialize a new pgd / pmd table with invalid pointers. 48 */ 49 extern void pgd_init(unsigned long page); 50 extern pgd_t *pgd_alloc(struct mm_struct *mm); 51 52 #define __pte_free_tlb(tlb,pte,address) \ 53 do { \ 54 pgtable_pte_page_dtor(pte); \ 55 tlb_remove_page((tlb), pte); \ 56 } while (0) 57 58 #ifndef __PAGETABLE_PMD_FOLDED 59 60 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address) 61 { 62 pmd_t *pmd; 63 64 pmd = (pmd_t *) __get_free_pages(GFP_KERNEL, PMD_ORDER); 65 if (pmd) 66 pmd_init((unsigned long)pmd, (unsigned long)invalid_pte_table); 67 return pmd; 68 } 69 70 #define __pmd_free_tlb(tlb, x, addr) pmd_free((tlb)->mm, x) 71 72 #endif 73 74 #ifndef __PAGETABLE_PUD_FOLDED 75 76 static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address) 77 { 78 pud_t *pud; 79 80 pud = (pud_t *) __get_free_pages(GFP_KERNEL, PUD_ORDER); 81 if (pud) 82 pud_init((unsigned long)pud, (unsigned long)invalid_pmd_table); 83 return pud; 84 } 85 86 static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4d, pud_t *pud) 87 { 88 set_p4d(p4d, __p4d((unsigned long)pud)); 89 } 90 91 #define __pud_free_tlb(tlb, x, addr) pud_free((tlb)->mm, x) 92 93 #endif /* __PAGETABLE_PUD_FOLDED */ 94 95 extern void pagetable_init(void); 96 97 #endif /* _ASM_PGALLOC_H */ 98