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(unsigned long page, unsigned long pagetable); 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 / pmd table with invalid pointers. 47 */ 48 extern void pgd_init(unsigned long page); 49 extern pgd_t *pgd_alloc(struct mm_struct *mm); 50 51 #define __pte_free_tlb(tlb,pte,address) \ 52 do { \ 53 pgtable_pte_page_dtor(pte); \ 54 tlb_remove_page((tlb), pte); \ 55 } while (0) 56 57 #ifndef __PAGETABLE_PMD_FOLDED 58 59 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address) 60 { 61 pmd_t *pmd; 62 struct page *pg; 63 64 pg = alloc_pages(GFP_KERNEL_ACCOUNT, PMD_ORDER); 65 if (!pg) 66 return NULL; 67 68 if (!pgtable_pmd_page_ctor(pg)) { 69 __free_pages(pg, PMD_ORDER); 70 return NULL; 71 } 72 73 pmd = (pmd_t *)page_address(pg); 74 pmd_init((unsigned long)pmd, (unsigned long)invalid_pte_table); 75 return pmd; 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 p4d_populate(struct mm_struct *mm, p4d_t *p4d, pud_t *pud) 95 { 96 set_p4d(p4d, __p4d((unsigned long)pud)); 97 } 98 99 #define __pud_free_tlb(tlb, x, addr) pud_free((tlb)->mm, x) 100 101 #endif /* __PAGETABLE_PUD_FOLDED */ 102 103 extern void pagetable_init(void); 104 105 #endif /* _ASM_PGALLOC_H */ 106