xref: /openbmc/linux/arch/arm/mm/hugetlbpage.c (revision ca15ca40) 
1 // SPDX-License-Identifier: GPL-2.0-only
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 
pud_huge(pud_t pud)26 int pud_huge(pud_t pud)
27 {
28 	return 0;
29 }
30 
pmd_huge(pmd_t pmd)31 int pmd_huge(pmd_t pmd)
32 {
33 	return pmd_val(pmd) && !(pmd_val(pmd) & PMD_TABLE_BIT);
34 }
35