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 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