linux/arch/arm/mm/hugetlbpage.c
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   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * arch/arm/mm/hugetlbpage.c
   4 *
   5 * Copyright (C) 2012 ARM Ltd.
   6 *
   7 * Based on arch/x86/include/asm/hugetlb.h and Bill Carson's patches
   8 */
   9
  10#include <linux/init.h>
  11#include <linux/fs.h>
  12#include <linux/mm.h>
  13#include <linux/hugetlb.h>
  14#include <linux/pagemap.h>
  15#include <linux/err.h>
  16#include <linux/sysctl.h>
  17#include <asm/mman.h>
  18#include <asm/tlb.h>
  19#include <asm/tlbflush.h>
  20
  21/*
  22 * On ARM, huge pages are backed by pmd's rather than pte's, so we do a lot
  23 * of type casting from pmd_t * to pte_t *.
  24 */
  25
  26int pud_huge(pud_t pud)
  27{
  28        return 0;
  29}
  30
  31int pmd_huge(pmd_t pmd)
  32{
  33        return pmd_val(pmd) && !(pmd_val(pmd) & PMD_TABLE_BIT);
  34}
  35