2 * arch/sh/mm/hugetlbpage.c
4 * SuperH HugeTLB page support.
6 * Cloned from sparc64 by Paul Mundt.
8 * Copyright (C) 2002, 2003 David S. Miller (davem@redhat.com)
11 #include <linux/init.h>
14 #include <linux/hugetlb.h>
15 #include <linux/pagemap.h>
16 #include <linux/slab.h>
17 #include <linux/sysctl.h>
20 #include <asm/pgalloc.h>
22 #include <asm/tlbflush.h>
23 #include <asm/cacheflush.h>
25 pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr)
32 pgd = pgd_offset(mm, addr);
34 pud = pud_alloc(mm, pgd, addr);
36 pmd = pmd_alloc(mm, pud, addr);
38 pte = pte_alloc_map(mm, pmd, addr);
45 pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr)
52 pgd = pgd_offset(mm, addr);
54 pud = pud_offset(pgd, addr);
56 pmd = pmd_offset(pud, addr);
58 pte = pte_offset_map(pmd, addr);
65 int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep)
70 struct page *follow_huge_addr(struct mm_struct *mm,
71 unsigned long address, int write)
73 return ERR_PTR(-EINVAL);
76 int pmd_huge(pmd_t pmd)
81 struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address,
82 pmd_t *pmd, int write)