LXR linux/arch/sh/mm/hugetlbpage.c

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * arch/sh/mm/hugetlbpage.c
   4 *
   5 * SuperH HugeTLB page support.
   6 *
   7 * Cloned from sparc64 by Paul Mundt.
   8 *
   9 * Copyright (C) 2002, 2003 David S. Miller (davem@redhat.com)
  10 */
  11
  12#include <linux/init.h>
  13#include <linux/fs.h>
  14#include <linux/mm.h>
  15#include <linux/hugetlb.h>
  16#include <linux/pagemap.h>
  17#include <linux/sysctl.h>
  18
  19#include <asm/mman.h>
  20#include <asm/pgalloc.h>
  21#include <asm/tlb.h>
  22#include <asm/tlbflush.h>
  23#include <asm/cacheflush.h>
  24
  25pte_t *huge_pte_alloc(struct mm_struct *mm,
  26                        unsigned long addr, unsigned long sz)
  27{
  28        pgd_t *pgd;
  29        pud_t *pud;
  30        pmd_t *pmd;
  31        pte_t *pte = NULL;
  32
  33        pgd = pgd_offset(mm, addr);
  34        if (pgd) {
  35                pud = pud_alloc(mm, pgd, addr);
  36                if (pud) {
  37                        pmd = pmd_alloc(mm, pud, addr);
  38                        if (pmd)
  39                                pte = pte_alloc_map(mm, pmd, addr);
  40                }
  41        }
  42
  43        return pte;
  44}
  45
  46pte_t *huge_pte_offset(struct mm_struct *mm,
  47                       unsigned long addr, unsigned long sz)
  48{
  49        pgd_t *pgd;
  50        pud_t *pud;
  51        pmd_t *pmd;
  52        pte_t *pte = NULL;
  53
  54        pgd = pgd_offset(mm, addr);
  55        if (pgd) {
  56                pud = pud_offset(pgd, addr);
  57                if (pud) {
  58                        pmd = pmd_offset(pud, addr);
  59                        if (pmd)
  60                                pte = pte_offset_map(pmd, addr);
  61                }
  62        }
  63
  64        return pte;
  65}
  66
  67int pmd_huge(pmd_t pmd)
  68{
  69        return 0;
  70}
  71
  72int pud_huge(pud_t pud)
  73{
  74        return 0;
  75}
  76