arch/ia64/include/asm/pgalloc.h

   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 */