1 #ifndef _ASM_IA64_PGALLOC_H 2 #define _ASM_IA64_PGALLOC_H 3 4 /* 5 * This file contains the functions and defines necessary to allocate 6 * page tables. 7 * 8 * This hopefully works with any (fixed) ia-64 page-size, as defined 9 * in <asm/page.h> (currently 8192). 10 * 11 * Copyright (C) 1998-2001 Hewlett-Packard Co 12 * David Mosberger-Tang <davidm@hpl.hp.com> 13 * Copyright (C) 2000, Goutham Rao <goutham.rao@intel.com> 14 */ 15 16 17 #include <linux/compiler.h> 18 #include <linux/mm.h> 19 #include <linux/page-flags.h> 20 #include <linux/threads.h> 21 #include <linux/quicklist.h> 22 23 #include <asm/mmu_context.h> 24 25 static inline pgd_t *pgd_alloc(struct mm_struct *mm) 26 { 27 return quicklist_alloc(0, GFP_KERNEL, NULL); 28 } 29 30 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) 31 { 32 quicklist_free(0, NULL, pgd); 33 } 34 35 #if CONFIG_PGTABLE_LEVELS == 4 36 static inline void 37 pgd_populate(struct mm_struct *mm, pgd_t * pgd_entry, pud_t * pud) 38 { 39 pgd_val(*pgd_entry) = __pa(pud); 40 } 41 42 static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr) 43 { 44 return quicklist_alloc(0, GFP_KERNEL, NULL); 45 } 46 47 static inline void pud_free(struct mm_struct *mm, pud_t *pud) 48 { 49 quicklist_free(0, NULL, pud); 50 } 51 #define __pud_free_tlb(tlb, pud, address) pud_free((tlb)->mm, pud) 52 #endif /* CONFIG_PGTABLE_LEVELS == 4 */ 53 54 static inline void 55 pud_populate(struct mm_struct *mm, pud_t * pud_entry, pmd_t * pmd) 56 { 57 pud_val(*pud_entry) = __pa(pmd); 58 } 59 60 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr) 61 { 62 return quicklist_alloc(0, GFP_KERNEL, NULL); 63 } 64 65 static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) 66 { 67 quicklist_free(0, NULL, pmd); 68 } 69 70 #define __pmd_free_tlb(tlb, pmd, address) pmd_free((tlb)->mm, pmd) 71 72 static inline void 73 pmd_populate(struct mm_struct *mm, pmd_t * pmd_entry, pgtable_t pte) 74 { 75 pmd_val(*pmd_entry) = page_to_phys(pte); 76 } 77 #define pmd_pgtable(pmd) pmd_page(pmd) 78 79 static inline void 80 pmd_populate_kernel(struct mm_struct *mm, pmd_t * pmd_entry, pte_t * pte) 81 { 82 pmd_val(*pmd_entry) = __pa(pte); 83 } 84 85 static inline pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long addr) 86 { 87 struct page *page; 88 void *pg; 89 90 pg = quicklist_alloc(0, GFP_KERNEL, NULL); 91 if (!pg) 92 return NULL; 93 page = virt_to_page(pg); 94 if (!pgtable_page_ctor(page)) { 95 quicklist_free(0, NULL, pg); 96 return NULL; 97 } 98 return page; 99 } 100 101 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, 102 unsigned long addr) 103 { 104 return quicklist_alloc(0, GFP_KERNEL, NULL); 105 } 106 107 static inline void pte_free(struct mm_struct *mm, pgtable_t pte) 108 { 109 pgtable_page_dtor(pte); 110 quicklist_free_page(0, NULL, pte); 111 } 112 113 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) 114 { 115 quicklist_free(0, NULL, pte); 116 } 117 118 static inline void check_pgt_cache(void) 119 { 120 quicklist_trim(0, NULL, 25, 16); 121 } 122 123 #define __pte_free_tlb(tlb, pte, address) pte_free((tlb)->mm, pte) 124 125 #endif /* _ASM_IA64_PGALLOC_H */ 126