LXR linux/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
  25static inline pgd_t *pgd_alloc(struct mm_struct *mm)
  26{
  27        return quicklist_alloc(0, GFP_KERNEL, NULL);
  28}
  29
  30static 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
  36static inline void
  37pgd_populate(struct mm_struct *mm, pgd_t * pgd_entry, pud_t * pud)
  38{
  39        pgd_val(*pgd_entry) = __pa(pud);
  40}
  41
  42static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
  43{
  44        return quicklist_alloc(0, GFP_KERNEL, NULL);
  45}
  46
  47static 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
  54static inline void
  55pud_populate(struct mm_struct *mm, pud_t * pud_entry, pmd_t * pmd)
  56{
  57        pud_val(*pud_entry) = __pa(pmd);
  58}
  59
  60static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
  61{
  62        return quicklist_alloc(0, GFP_KERNEL, NULL);
  63}
  64
  65static 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
  72static inline void
  73pmd_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
  79static inline void
  80pmd_populate_kernel(struct mm_struct *mm, pmd_t * pmd_entry, pte_t * pte)
  81{
  82        pmd_val(*pmd_entry) = __pa(pte);
  83}
  84
  85static 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
 101static 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
 107static 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
 113static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
 114{
 115        quicklist_free(0, NULL, pte);
 116}
 117
 118static 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