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/smp_lock.h>
17 #include <linux/slab.h>
18 #include <linux/sysctl.h>
21 #include <asm/pgalloc.h>
23 #include <asm/tlbflush.h>
24 #include <asm/cacheflush.h>
26 pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr)
32 pgd = pgd_offset(mm, addr);
34 pmd = pmd_alloc(mm, pgd, addr);
36 pte = pte_alloc_map(mm, pmd, addr);
41 pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr)
47 pgd = pgd_offset(mm, addr);
49 pmd = pmd_offset(pgd, addr);
51 pte = pte_offset_map(pmd, addr);
56 void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
57 pte_t *ptep, pte_t entry)
61 for (i = 0; i < (1 << HUGETLB_PAGE_ORDER); i++) {
62 set_pte_at(mm, addr, ptep, entry);
65 pte_val(entry) += PAGE_SIZE;
69 pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
77 for (i = 0; i < (1 << HUGETLB_PAGE_ORDER); i++) {
78 pte_clear(mm, addr, ptep);
86 struct page *follow_huge_addr(struct mm_struct *mm,
87 unsigned long address, int write)
89 return ERR_PTR(-EINVAL);
92 int pmd_huge(pmd_t pmd)
97 struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address,
98 pmd_t *pmd, int write)