[ARM] pxa: update defconfig for Verdex Pro
[linux-2.6/verdex.git] / arch / sh / mm / hugetlbpage.c
blob9304117039c4f887d7a94f70e48a73c6d1549ef8
1 /*
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)
9 */
11 #include <linux/init.h>
12 #include <linux/fs.h>
13 #include <linux/mm.h>
14 #include <linux/hugetlb.h>
15 #include <linux/pagemap.h>
16 #include <linux/slab.h>
17 #include <linux/sysctl.h>
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>
25 pte_t *huge_pte_alloc(struct mm_struct *mm,
26 unsigned long addr, unsigned long sz)
28 pgd_t *pgd;
29 pud_t *pud;
30 pmd_t *pmd;
31 pte_t *pte = NULL;
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);
43 return pte;
46 pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr)
48 pgd_t *pgd;
49 pud_t *pud;
50 pmd_t *pmd;
51 pte_t *pte = NULL;
53 pgd = pgd_offset(mm, addr);
54 if (pgd) {
55 pud = pud_offset(pgd, addr);
56 if (pud) {
57 pmd = pmd_offset(pud, addr);
58 if (pmd)
59 pte = pte_offset_map(pmd, addr);
63 return pte;
66 int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep)
68 return 0;
71 struct page *follow_huge_addr(struct mm_struct *mm,
72 unsigned long address, int write)
74 return ERR_PTR(-EINVAL);
77 int pmd_huge(pmd_t pmd)
79 return 0;
82 int pud_huge(pud_t pud)
84 return 0;
87 struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address,
88 pmd_t *pmd, int write)
90 return NULL;