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_FSL_BOOK3E)
11#include <asm/nohash/hugetlb-book3e.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 hugetlbpage_init_default(void);
19
20void flush_dcache_icache_hugepage(struct page *page);
21
22int slice_is_hugepage_only_range(struct mm_struct *mm, unsigned long addr,
23			   unsigned long len);
24
25static inline int is_hugepage_only_range(struct mm_struct *mm,
26					 unsigned long addr,
27					 unsigned long len)
28{
29	if (IS_ENABLED(CONFIG_PPC_MM_SLICES) && !radix_enabled())
30		return slice_is_hugepage_only_range(mm, addr, len);
31	return 0;
32}
33#define is_hugepage_only_range is_hugepage_only_range
34
35#define __HAVE_ARCH_HUGETLB_FREE_PGD_RANGE
36void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long addr,
37			    unsigned long end, unsigned long floor,
38			    unsigned long ceiling);
39
40#define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
41static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
42					    unsigned long addr, pte_t *ptep)
43{
44	return __pte(pte_update(mm, addr, ptep, ~0UL, 0, 1));
45}
46
47#define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
48static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
49					 unsigned long addr, pte_t *ptep)
50{
51	huge_ptep_get_and_clear(vma->vm_mm, addr, ptep);
52	flush_hugetlb_page(vma, addr);
53}
54
55#define __HAVE_ARCH_HUGE_PTEP_SET_ACCESS_FLAGS
56int huge_ptep_set_access_flags(struct vm_area_struct *vma,
57			       unsigned long addr, pte_t *ptep,
58			       pte_t pte, int dirty);
59
60void gigantic_hugetlb_cma_reserve(void) __init;
61#include <asm-generic/hugetlb.h>
62
63#else /* ! CONFIG_HUGETLB_PAGE */
64static inline void flush_hugetlb_page(struct vm_area_struct *vma,
65				      unsigned long vmaddr)
66{
67}
68
69#define hugepd_shift(x) 0
70static inline pte_t *hugepte_offset(hugepd_t hpd, unsigned long addr,
71				    unsigned pdshift)
72{
73	return NULL;
74}
75
76
77static inline void __init gigantic_hugetlb_cma_reserve(void)
78{
79}
80
81#endif /* CONFIG_HUGETLB_PAGE */
82
83#endif /* _ASM_POWERPC_HUGETLB_H */
84