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/config.h"
  12 #include "linux/mm.h"
  13 #include "asm/fixmap.h"
  14
  15 #define pmd_populate_kernel(mm, pmd, pte) \
  16         set_pmd(pmd, __pmd(_PAGE_TABLE + (unsigned long) __pa(pte)))
  17
  18 #define pmd_populate(mm, pmd, pte)                              \
  19         set_pmd(pmd, __pmd(_PAGE_TABLE +                        \
  20                 ((unsigned long long)page_to_pfn(pte) <<        \
  21                         (unsigned long long) PAGE_SHIFT)))
  22
  23 /*
  24  * Allocate and free page tables.
  25  */
  26 extern pgd_t *pgd_alloc(struct mm_struct *);
  27 extern void pgd_free(pgd_t *pgd);
  28
  29 extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
  30 extern struct page *pte_alloc_one(struct mm_struct *, unsigned long);
  31
  32 static inline void pte_free_kernel(pte_t *pte)
  33 {
  34         free_page((unsigned long) pte);
  35 }
  36
  37 static inline void pte_free(struct page *pte)
  38 {
  39         __free_page(pte);
  40 }
  41
  42 #define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
  43
  44 #ifdef CONFIG_3_LEVEL_PGTABLES
  45 /*
  46  * In the 3-level case we free the pmds as part of the pgd.
  47  */
  48 #define pmd_free(x)                     do { } while (0)
  49 #define __pmd_free_tlb(tlb,x)           do { } while (0)
  50 #endif
  51
  52 #define check_pgt_cache()       do { } while (0)
  53
  54 #endif
  55
  56 /*
  57  * Overrides for Emacs so that we follow Linus's tabbing style.
  58  * Emacs will notice this stuff at the end of the file and automatically
  59  * adjust the settings for this buffer only.  This must remain at the end
  60  * of the file.
  61  * ---------------------------------------------------------------------------
  62  * Local variables:
  63  * c-file-style: "linux"
  64  * End:
  65  */