1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_POWERPC_HUGETLB_H
3#define _ASM_POWERPC_HUGETLB_H
4
5#ifdef CONFIG_HUGETLB_PAGE
6#include <asm/page.h>
7
8#ifdef CONFIG_PPC_BOOK3S_64
9#include <asm/book3s/64/hugetlb.h>
10#elif defined(CONFIG_PPC_E500)
11#include <asm/nohash/hugetlb-e500.h>
12#elif defined(CONFIG_PPC_8xx)
13#include <asm/nohash/32/hugetlb-8xx.h>
14#endif /* CONFIG_PPC_BOOK3S_64 */
15
16extern bool hugetlb_disabled;
17
18void __init hugetlbpage_init_defaultsize(void);
19
20int slice_is_hugepage_only_range(struct mm_struct *mm, unsigned long addr,
21			   unsigned long len);
22
23static inline int is_hugepage_only_range(struct mm_struct *mm,
24					 unsigned long addr,
25					 unsigned long len)
26{
27	if (IS_ENABLED(CONFIG_PPC_64S_HASH_MMU) && !radix_enabled())
28		return slice_is_hugepage_only_range(mm, addr, len);
29	return 0;
30}
31#define is_hugepage_only_range is_hugepage_only_range
32
33#define __HAVE_ARCH_HUGETLB_FREE_PGD_RANGE
34void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long addr,
35			    unsigned long end, unsigned long floor,
36			    unsigned long ceiling);
37
38#define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
39static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
40					    unsigned long addr, pte_t *ptep)
41{
42	return __pte(pte_update(mm, addr, ptep, ~0UL, 0, 1));
43}
44
45#define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
46static inline pte_t huge_ptep_clear_flush(struct vm_area_struct *vma,
47					  unsigned long addr, pte_t *ptep)
48{
49	pte_t pte;
50
51	pte = huge_ptep_get_and_clear(vma->vm_mm, addr, ptep);
52	flush_hugetlb_page(vma, addr);
53	return pte;
54}
55
56#define __HAVE_ARCH_HUGE_PTEP_SET_ACCESS_FLAGS
57int huge_ptep_set_access_flags(struct vm_area_struct *vma,
58			       unsigned long addr, pte_t *ptep,
59			       pte_t pte, int dirty);
60
61void gigantic_hugetlb_cma_reserve(void) __init;
62#include <asm-generic/hugetlb.h>
63
64#else /* ! CONFIG_HUGETLB_PAGE */
65static inline void flush_hugetlb_page(struct vm_area_struct *vma,
66				      unsigned long vmaddr)
67{
68}
69
70#define hugepd_shift(x) 0
71static inline pte_t *hugepte_offset(hugepd_t hpd, unsigned long addr,
72				    unsigned pdshift)
73{
74	return NULL;
75}
76
77
78static inline void __init gigantic_hugetlb_cma_reserve(void)
79{
80}
81
82static inline void __init hugetlbpage_init_defaultsize(void)
83{
84}
85#endif /* CONFIG_HUGETLB_PAGE */
86
87#endif /* _ASM_POWERPC_HUGETLB_H */
88