arch/um/include/asm/pgalloc.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
   4  * Copyright 2003 PathScale, Inc.
   5  * Derived from include/asm-i386/pgalloc.h and include/asm-i386/pgtable.h
   6  */
   7
   8 #ifndef __UM_PGALLOC_H
   9 #define __UM_PGALLOC_H
  10
  11 #include <linux/mm.h>
  12
  13 #include <asm-generic/pgalloc.h>        /* for pte_{alloc,free}_one */
  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 #define pmd_pgtable(pmd) pmd_page(pmd)
  23
  24 /*
  25  * Allocate and free page tables.
  26  */
  27 extern pgd_t *pgd_alloc(struct mm_struct *);
  28 extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
  29
  30 #define __pte_free_tlb(tlb,pte, address)                \
  31 do {                                                    \
  32         pgtable_pte_page_dtor(pte);                     \
  33         tlb_remove_page((tlb),(pte));                   \
  34 } while (0)
  35
  36 #ifdef CONFIG_3_LEVEL_PGTABLES
  37
  38 static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
  39 {
  40         free_page((unsigned long)pmd);
  41 }
  42
  43 #define __pmd_free_tlb(tlb,x, address)   tlb_remove_page((tlb),virt_to_page(x))
  44 #endif
  45
  46 #endif
  47