1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * arch/arm64/include/asm/hugetlb.h
4 *
5 * Copyright (C) 2013 Linaro Ltd.
6 *
7 * Based on arch/x86/include/asm/hugetlb.h
8 */
9
10#ifndef __ASM_HUGETLB_H
11#define __ASM_HUGETLB_H
12
13#include <asm/page.h>
14
15#ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION
16#define arch_hugetlb_migration_supported arch_hugetlb_migration_supported
17extern bool arch_hugetlb_migration_supported(struct hstate *h);
18#endif
19
20static inline void arch_clear_hugepage_flags(struct page *page)
21{
22	clear_bit(PG_dcache_clean, &page->flags);
23}
24#define arch_clear_hugepage_flags arch_clear_hugepage_flags
25
26extern pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,
27				struct page *page, int writable);
28#define arch_make_huge_pte arch_make_huge_pte
29#define __HAVE_ARCH_HUGE_SET_HUGE_PTE_AT
30extern void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
31			    pte_t *ptep, pte_t pte);
32#define __HAVE_ARCH_HUGE_PTEP_SET_ACCESS_FLAGS
33extern int huge_ptep_set_access_flags(struct vm_area_struct *vma,
34				      unsigned long addr, pte_t *ptep,
35				      pte_t pte, int dirty);
36#define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
37extern pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
38				     unsigned long addr, pte_t *ptep);
39#define __HAVE_ARCH_HUGE_PTEP_SET_WRPROTECT
40extern void huge_ptep_set_wrprotect(struct mm_struct *mm,
41				    unsigned long addr, pte_t *ptep);
42#define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
43extern void huge_ptep_clear_flush(struct vm_area_struct *vma,
44				  unsigned long addr, pte_t *ptep);
45#define __HAVE_ARCH_HUGE_PTE_CLEAR
46extern void huge_pte_clear(struct mm_struct *mm, unsigned long addr,
47			   pte_t *ptep, unsigned long sz);
48extern void set_huge_swap_pte_at(struct mm_struct *mm, unsigned long addr,
49				 pte_t *ptep, pte_t pte, unsigned long sz);
50#define set_huge_swap_pte_at set_huge_swap_pte_at
51
52void __init arm64_hugetlb_cma_reserve(void);
53
54#include <asm-generic/hugetlb.h>
55
56#endif /* __ASM_HUGETLB_H */
57