arch/ia64/include/asm/pgalloc.h

   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 */