1 | // SPDX-License-Identifier: GPL-2.0-only |
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2 | /* |
3 | * arch/arm/mm/hugetlbpage.c |
4 | * |
5 | * Copyright (C) 2012 ARM Ltd. |
6 | * |
7 | * Based on arch/x86/include/asm/hugetlb.h and Bill Carson's patches |
8 | */ |
9 | |
10 | #include <linux/init.h> |
11 | #include <linux/fs.h> |
12 | #include <linux/mm.h> |
13 | #include <linux/hugetlb.h> |
14 | #include <linux/pagemap.h> |
15 | #include <linux/err.h> |
16 | #include <linux/sysctl.h> |
17 | #include <asm/mman.h> |
18 | #include <asm/tlb.h> |
19 | #include <asm/tlbflush.h> |
20 | |
21 | /* |
22 | * On ARM, huge pages are backed by pmd's rather than pte's, so we do a lot |
23 | * of type casting from pmd_t * to pte_t *. |
24 | */ |
25 | |
26 | int pud_huge(pud_t pud) |
27 | { |
28 | return 0; |
29 | } |
30 | |
31 | int pmd_huge(pmd_t pmd) |
32 | { |
33 | return pmd_val(pmd) && !(pmd_val(pmd) & PMD_TABLE_BIT); |
34 | } |
35 |