include/asm-ia64/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(pgd_t * pgd)
  31 {
  32         quicklist_free(0, NULL, pgd);
  33 }
  34
  35 #ifdef CONFIG_PGTABLE_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(pud_t * pud)
  48 {
  49         quicklist_free(0, NULL, pud);
  50 }
  51 #define __pud_free_tlb(tlb, pud)        pud_free(pud)
  52 #endif /* CONFIG_PGTABLE_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(pmd_t * pmd)
  66 {
  67         quicklist_free(0, NULL, pmd);
  68 }
  69
  70 #define __pmd_free_tlb(tlb, pmd)        pmd_free(pmd)
  71
  72 static inline void
  73 pmd_populate(struct mm_struct *mm, pmd_t * pmd_entry, struct page *pte)
  74 {
  75         pmd_val(*pmd_entry) = page_to_phys(pte);
  76 }
  77
  78 static inline void
  79 pmd_populate_kernel(struct mm_struct *mm, pmd_t * pmd_entry, pte_t * pte)
  80 {
  81         pmd_val(*pmd_entry) = __pa(pte);
  82 }
  83
  84 static inline struct page *pte_alloc_one(struct mm_struct *mm,
  85                                          unsigned long addr)
  86 {
  87         void *pg = quicklist_alloc(0, GFP_KERNEL, NULL);
  88         return pg ? virt_to_page(pg) : NULL;
  89 }
  90
  91 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
  92                                           unsigned long addr)
  93 {
  94         return quicklist_alloc(0, GFP_KERNEL, NULL);
  95 }
  96
  97 static inline void pte_free(struct page *pte)
  98 {
  99         quicklist_free_page(0, NULL, pte);
 100 }
 101
 102 static inline void pte_free_kernel(pte_t * pte)
 103 {
 104         quicklist_free(0, NULL, pte);
 105 }
 106
 107 static inline void check_pgt_cache(void)
 108 {
 109         quicklist_trim(0, NULL, 25, 16);
 110 }
 111
 112 #define __pte_free_tlb(tlb, pte)        pte_free(pte)
 113
 114 #endif                          /* _ASM_IA64_PGALLOC_H */