include/asm-um/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 #include "asm/fixmap.h"
  13
  14 #define pmd_populate_kernel(mm, pmd, pte) \
  15         set_pmd(pmd, __pmd(_PAGE_TABLE + (unsigned long) __pa(pte)))
  16
  17 #define pmd_populate(mm, pmd, pte)                              \
  18         set_pmd(pmd, __pmd(_PAGE_TABLE +                        \
  19                 ((unsigned long long)page_to_pfn(pte) <<        \
  20                         (unsigned long long) PAGE_SHIFT)))
  21
  22 /*
  23  * Allocate and free page tables.
  24  */
  25 extern pgd_t *pgd_alloc(struct mm_struct *);
  26 extern void pgd_free(pgd_t *pgd);
  27
  28 extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
  29 extern struct page *pte_alloc_one(struct mm_struct *, unsigned long);
  30
  31 static inline void pte_free_kernel(pte_t *pte)
  32 {
  33         free_page((unsigned long) pte);
  34 }
  35
  36 static inline void pte_free(struct page *pte)
  37 {
  38         __free_page(pte);
  39 }
  40
  41 #define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
  42
  43 #ifdef CONFIG_3_LEVEL_PGTABLES
  44
  45 static inline void pmd_free(pmd_t *pmd)
  46 {
  47         free_page((unsigned long)pmd);
  48 }
  49
  50 #define __pmd_free_tlb(tlb,x)   tlb_remove_page((tlb),virt_to_page(x))
  51 #endif
  52
  53 #define check_pgt_cache()       do { } while (0)
  54
  55 #endif
  56
  57 /*
  58  * Overrides for Emacs so that we follow Linus's tabbing style.
  59  * Emacs will notice this stuff at the end of the file and automatically
  60  * adjust the settings for this buffer only.  This must remain at the end
  61  * of the file.
  62  * ---------------------------------------------------------------------------
  63  * Local variables:
  64  * c-file-style: "linux"
  65  * End:
  66  */