2 * arch/sh64/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)
31 pgd = pgd_offset(mm, addr);
33 pmd = pmd_alloc(mm, pgd, addr);
35 pte = pte_alloc_map(mm, pmd, addr);
40 pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr)
46 pgd = pgd_offset(mm, addr);
48 pmd = pmd_offset(pgd, addr);
50 pte = pte_offset_map(pmd, addr);
55 int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep)
60 void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
61 pte_t *ptep, pte_t entry)
65 for (i = 0; i < (1 << HUGETLB_PAGE_ORDER); i++) {
66 set_pte_at(mm, addr, ptep, entry);
69 pte_val(entry) += PAGE_SIZE;
73 pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
81 for (i = 0; i < (1 << HUGETLB_PAGE_ORDER); i++) {
82 pte_clear(mm, addr, ptep);
90 struct page *follow_huge_addr(struct mm_struct *mm,
91 unsigned long address, int write)
93 return ERR_PTR(-EINVAL);
96 int pmd_huge(pmd_t pmd)
101 struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address,
102 pmd_t *pmd, int write)