1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_IA64_PGALLOC_H 3 #define _ASM_IA64_PGALLOC_H 4 5 /* 6 * This file contains the functions and defines necessary to allocate 7 * page tables. 8 * 9 * This hopefully works with any (fixed) ia-64 page-size, as defined 10 * in <asm/page.h> (currently 8192). 11 * 12 * Copyright (C) 1998-2001 Hewlett-Packard Co 13 * David Mosberger-Tang <davidm@hpl.hp.com> 14 * Copyright (C) 2000, Goutham Rao <goutham.rao@intel.com> 15 */ 16 17 18 #include <linux/compiler.h> 19 #include <linux/mm.h> 20 #include <linux/page-flags.h> 21 #include <linux/threads.h> 22 #include <linux/quicklist.h> 23 24 #include <asm/mmu_context.h> 25 26 static inline pgd_t *pgd_alloc(struct mm_struct *mm) 27 { 28 return quicklist_alloc(0, GFP_KERNEL, NULL); 29 } 30 31 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) 32 { 33 quicklist_free(0, NULL, pgd); 34 } 35 36 #if CONFIG_PGTABLE_LEVELS == 4 37 static inline void 38 pgd_populate(struct mm_struct *mm, pgd_t * pgd_entry, pud_t * pud) 39 { 40 pgd_val(*pgd_entry) = __pa(pud); 41 } 42 43 static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr) 44 { 45 return quicklist_alloc(0, GFP_KERNEL, NULL); 46 } 47 48 static inline void pud_free(struct mm_struct *mm, pud_t *pud) 49 { 50 quicklist_free(0, NULL, pud); 51 } 52 #define __pud_free_tlb(tlb, pud, address) pud_free((tlb)->mm, pud) 53 #endif /* CONFIG_PGTABLE_LEVELS == 4 */ 54 55 static inline void 56 pud_populate(struct mm_struct *mm, pud_t * pud_entry, pmd_t * pmd) 57 { 58 pud_val(*pud_entry) = __pa(pmd); 59 } 60 61 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr) 62 { 63 return quicklist_alloc(0, GFP_KERNEL, NULL); 64 } 65 66 static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) 67 { 68 quicklist_free(0, NULL, pmd); 69 } 70 71 #define __pmd_free_tlb(tlb, pmd, address) pmd_free((tlb)->mm, pmd) 72 73 static inline void 74 pmd_populate(struct mm_struct *mm, pmd_t * pmd_entry, pgtable_t pte) 75 { 76 pmd_val(*pmd_entry) = page_to_phys(pte); 77 } 78 #define pmd_pgtable(pmd) pmd_page(pmd) 79 80 static inline void 81 pmd_populate_kernel(struct mm_struct *mm, pmd_t * pmd_entry, pte_t * pte) 82 { 83 pmd_val(*pmd_entry) = __pa(pte); 84 } 85 86 static inline pgtable_t pte_alloc_one(struct mm_struct *mm) 87 { 88 struct page *page; 89 void *pg; 90 91 pg = quicklist_alloc(0, GFP_KERNEL, NULL); 92 if (!pg) 93 return NULL; 94 page = virt_to_page(pg); 95 if (!pgtable_page_ctor(page)) { 96 quicklist_free(0, NULL, pg); 97 return NULL; 98 } 99 return page; 100 } 101 102 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm) 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