1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_POWERPC_NOHASH_32_HUGETLB_8XX_H
3 #define _ASM_POWERPC_NOHASH_32_HUGETLB_8XX_H
4
5 #define PAGE_SHIFT_8M 23
6
7 static inline void flush_hugetlb_page(struct vm_area_struct *vma,
8 unsigned long vmaddr)
9 {
10 flush_tlb_page(vma, vmaddr);
11 }
12
13 static inline int check_and_get_huge_psize(int shift)
14 {
15 return shift_to_mmu_psize(shift);
16 }
17
18 #define __HAVE_ARCH_HUGE_SET_HUGE_PTE_AT
19 void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep,
20 pte_t pte, unsigned long sz);
21
22 #define __HAVE_ARCH_HUGE_PTEP_GET
23 static inline pte_t huge_ptep_get(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
24 {
25 if (ptep_is_8m_pmdp(mm, addr, ptep))
26 ptep = pte_offset_kernel((pmd_t *)ptep, ALIGN_DOWN(addr, SZ_8M));
27 return ptep_get(ptep);
28 }
29
30 #define __HAVE_ARCH_HUGE_PTE_CLEAR
31 static inline void huge_pte_clear(struct mm_struct *mm, unsigned long addr,
32 pte_t *ptep, unsigned long sz)
33 {
34 pte_update(mm, addr, ptep, ~0UL, 0, 1);
35 }
36
37 #define __HAVE_ARCH_HUGE_PTEP_SET_WRPROTECT
38 static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
39 unsigned long addr, pte_t *ptep)
40 {
41 unsigned long clr = ~pte_val(pte_wrprotect(__pte(~0)));
42 unsigned long set = pte_val(pte_wrprotect(__pte(0)));
43
44 pte_update(mm, addr, ptep, clr, set, 1);
45 }
46
47 #ifdef CONFIG_PPC_4K_PAGES
48 static inline pte_t arch_make_huge_pte(pte_t entry, unsigned int shift, vm_flags_t flags)
49 {
50 size_t size = 1UL << shift;
51
52 if (size == SZ_16K)
53 return __pte(pte_val(entry) | _PAGE_SPS);
54 else
55 return __pte(pte_val(entry) | _PAGE_SPS | _PAGE_HUGE);
56 }
57 #define arch_make_huge_pte arch_make_huge_pte
58 #endif
59
60 #endif /* _ASM_POWERPC_NOHASH_32_HUGETLB_8XX_H */
61
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