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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* |
3 | * arch/sh/mm/hugetlbpage.c | |
4 | * | |
5 | * SuperH HugeTLB page support. | |
6 | * | |
7 | * Cloned from sparc64 by Paul Mundt. | |
8 | * | |
9 | * Copyright (C) 2002, 2003 David S. Miller (davem@redhat.com) | |
10 | */ | |
11 | ||
1da177e4 LT |
12 | #include <linux/init.h> |
13 | #include <linux/fs.h> | |
14 | #include <linux/mm.h> | |
15 | #include <linux/hugetlb.h> | |
16 | #include <linux/pagemap.h> | |
1da177e4 LT |
17 | #include <linux/sysctl.h> |
18 | ||
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> | |
24 | ||
a5516438 AK |
25 | pte_t *huge_pte_alloc(struct mm_struct *mm, |
26 | unsigned long addr, unsigned long sz) | |
1da177e4 LT |
27 | { |
28 | pgd_t *pgd; | |
3f787fe2 | 29 | pud_t *pud; |
1da177e4 LT |
30 | pmd_t *pmd; |
31 | pte_t *pte = NULL; | |
32 | ||
33 | pgd = pgd_offset(mm, addr); | |
34 | if (pgd) { | |
3f787fe2 PM |
35 | pud = pud_alloc(mm, pgd, addr); |
36 | if (pud) { | |
37 | pmd = pmd_alloc(mm, pud, addr); | |
38 | if (pmd) | |
3ed3a4f0 | 39 | pte = pte_alloc_map(mm, pmd, addr); |
3f787fe2 | 40 | } |
1da177e4 | 41 | } |
3f787fe2 | 42 | |
1da177e4 LT |
43 | return pte; |
44 | } | |
45 | ||
7868a208 PA |
46 | pte_t *huge_pte_offset(struct mm_struct *mm, |
47 | unsigned long addr, unsigned long sz) | |
1da177e4 LT |
48 | { |
49 | pgd_t *pgd; | |
3f787fe2 | 50 | pud_t *pud; |
1da177e4 LT |
51 | pmd_t *pmd; |
52 | pte_t *pte = NULL; | |
53 | ||
54 | pgd = pgd_offset(mm, addr); | |
55 | if (pgd) { | |
3f787fe2 PM |
56 | pud = pud_offset(pgd, addr); |
57 | if (pud) { | |
58 | pmd = pmd_offset(pud, addr); | |
59 | if (pmd) | |
60 | pte = pte_offset_map(pmd, addr); | |
61 | } | |
63551ae0 | 62 | } |
1da177e4 | 63 | |
3f787fe2 | 64 | return pte; |
1da177e4 LT |
65 | } |
66 | ||
1da177e4 LT |
67 | int pmd_huge(pmd_t pmd) |
68 | { | |
69 | return 0; | |
70 | } | |
71 | ||
ceb86879 AK |
72 | int pud_huge(pud_t pud) |
73 | { | |
74 | return 0; | |
75 | } |