72 lines
1.3 KiB
C
72 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* arch/sh/mm/hugetlbpage.c
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*
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* SuperH HugeTLB page support.
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*
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* Cloned from sparc64 by Paul Mundt.
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*
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* Copyright (C) 2002, 2003 David S. Miller (davem@redhat.com)
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*/
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#include <linux/init.h>
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#include <linux/fs.h>
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#include <linux/mm.h>
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#include <linux/hugetlb.h>
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#include <linux/pagemap.h>
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#include <linux/sysctl.h>
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#include <asm/mman.h>
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#include <asm/tlb.h>
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#include <asm/tlbflush.h>
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#include <asm/cacheflush.h>
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pte_t *huge_pte_alloc(struct mm_struct *mm, struct vm_area_struct *vma,
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unsigned long addr, unsigned long sz)
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{
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pgd_t *pgd;
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p4d_t *p4d;
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pud_t *pud;
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pmd_t *pmd;
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pte_t *pte = NULL;
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pgd = pgd_offset(mm, addr);
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if (pgd) {
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p4d = p4d_alloc(mm, pgd, addr);
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if (p4d) {
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pud = pud_alloc(mm, p4d, addr);
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if (pud) {
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pmd = pmd_alloc(mm, pud, addr);
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if (pmd)
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pte = pte_alloc_huge(mm, pmd, addr);
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}
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}
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}
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return pte;
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}
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pte_t *huge_pte_offset(struct mm_struct *mm,
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unsigned long addr, unsigned long sz)
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{
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pgd_t *pgd;
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p4d_t *p4d;
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pud_t *pud;
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pmd_t *pmd;
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pte_t *pte = NULL;
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pgd = pgd_offset(mm, addr);
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if (pgd) {
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p4d = p4d_offset(pgd, addr);
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if (p4d) {
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pud = pud_offset(p4d, addr);
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if (pud) {
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pmd = pmd_offset(pud, addr);
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if (pmd)
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pte = pte_offset_huge(pmd, addr);
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}
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}
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}
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return pte;
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}
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