| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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, unsigned long addr) |
| 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 | unsigned long addr) |
| 104 | { |
| 105 | return quicklist_alloc(0, GFP_KERNEL, NULL); |
| 106 | } |
| 107 | |
| 108 | static inline void pte_free(struct mm_struct *mm, pgtable_t pte) |
| 109 | { |
| 110 | pgtable_page_dtor(pte); |
| 111 | quicklist_free_page(0, NULL, pte); |
| 112 | } |
| 113 | |
| 114 | static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) |
| 115 | { |
| 116 | quicklist_free(0, NULL, pte); |
| 117 | } |
| 118 | |
| 119 | static inline void check_pgt_cache(void) |
| 120 | { |
| 121 | quicklist_trim(0, NULL, 25, 16); |
| 122 | } |
| 123 | |
| 124 | #define __pte_free_tlb(tlb, pte, address) pte_free((tlb)->mm, pte) |
| 125 | |
| 126 | #endif /* _ASM_IA64_PGALLOC_H */ |