kernel/arch/um/include/asm/pgalloc.h

   1 /*
   2  * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
   3  * Copyright 2003 PathScale, Inc.
   4  * Derived from include/asm-i386/pgalloc.h and include/asm-i386/pgtable.h
   5  * Licensed under the GPL
   6  */
   7
   8 #ifndef __UM_PGALLOC_H
   9 #define __UM_PGALLOC_H
  10
  11 #include <linux/mm.h>
  12
  13 #define pmd_populate_kernel(mm, pmd, pte) \
  14         set_pmd(pmd, __pmd(_PAGE_TABLE + (unsigned long) __pa(pte)))
  15
  16 #define pmd_populate(mm, pmd, pte)                              \
  17         set_pmd(pmd, __pmd(_PAGE_TABLE +                        \
  18                 ((unsigned long long)page_to_pfn(pte) <<        \
  19                         (unsigned long long) PAGE_SHIFT)))
  20 #define pmd_pgtable(pmd) pmd_page(pmd)
  21
  22 /*
  23  * Allocate and free page tables.
  24  */
  25 extern pgd_t *pgd_alloc(struct mm_struct *);
  26 extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
  27
  28 extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
  29 extern pgtable_t pte_alloc_one(struct mm_struct *, unsigned long);
  30
  31 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
  32 {
  33         free_page((unsigned long) pte);
  34 }
  35
  36 static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
  37 {
  38         pgtable_page_dtor(pte);
  39         __free_page(pte);
  40 }
  41
  42 #define __pte_free_tlb(tlb,pte, address)                \
  43 do {                                                    \
  44         pgtable_page_dtor(pte);                         \
  45         tlb_remove_page((tlb),(pte));                   \
  46 } while (0)
  47
  48 #ifdef CONFIG_3_LEVEL_PGTABLES
  49
  50 static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
  51 {
  52         free_page((unsigned long)pmd);
  53 }
  54
  55 #define __pmd_free_tlb(tlb,x, address)   tlb_remove_page((tlb),virt_to_page(x))
  56 #endif
  57
  58 #define check_pgt_cache()       do { } while (0)
  59
  60 #endif
  61