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
hugepd_page(hugepd_t hpd)7 static inline pte_t *hugepd_page(hugepd_t hpd)
8 {
9 BUG_ON(!hugepd_ok(hpd));
10
11 return (pte_t *)__va(hpd_val(hpd) & ~HUGEPD_SHIFT_MASK);
12 }
13
hugepd_shift(hugepd_t hpd)14 static inline unsigned int hugepd_shift(hugepd_t hpd)
15 {
16 return PAGE_SHIFT_8M;
17 }
18
hugepte_offset(hugepd_t hpd,unsigned long addr,unsigned int pdshift)19 static inline pte_t *hugepte_offset(hugepd_t hpd, unsigned long addr,
20 unsigned int pdshift)
21 {
22 unsigned long idx = (addr & (SZ_4M - 1)) >> PAGE_SHIFT;
23
24 return hugepd_page(hpd) + idx;
25 }
26
flush_hugetlb_page(struct vm_area_struct * vma,unsigned long vmaddr)27 static inline void flush_hugetlb_page(struct vm_area_struct *vma,
28 unsigned long vmaddr)
29 {
30 flush_tlb_page(vma, vmaddr);
31 }
32
hugepd_populate(hugepd_t * hpdp,pte_t * new,unsigned int pshift)33 static inline void hugepd_populate(hugepd_t *hpdp, pte_t *new, unsigned int pshift)
34 {
35 *hpdp = __hugepd(__pa(new) | _PMD_USER | _PMD_PRESENT | _PMD_PAGE_8M);
36 }
37
hugepd_populate_kernel(hugepd_t * hpdp,pte_t * new,unsigned int pshift)38 static inline void hugepd_populate_kernel(hugepd_t *hpdp, pte_t *new, unsigned int pshift)
39 {
40 *hpdp = __hugepd(__pa(new) | _PMD_PRESENT | _PMD_PAGE_8M);
41 }
42
check_and_get_huge_psize(int shift)43 static inline int check_and_get_huge_psize(int shift)
44 {
45 return shift_to_mmu_psize(shift);
46 }
47
48 #define __HAVE_ARCH_HUGE_SET_HUGE_PTE_AT
49 void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte);
50
51 #define __HAVE_ARCH_HUGE_PTE_CLEAR
huge_pte_clear(struct mm_struct * mm,unsigned long addr,pte_t * ptep,unsigned long sz)52 static inline void huge_pte_clear(struct mm_struct *mm, unsigned long addr,
53 pte_t *ptep, unsigned long sz)
54 {
55 pte_update(mm, addr, ptep, ~0UL, 0, 1);
56 }
57
58 #define __HAVE_ARCH_HUGE_PTEP_SET_WRPROTECT
huge_ptep_set_wrprotect(struct mm_struct * mm,unsigned long addr,pte_t * ptep)59 static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
60 unsigned long addr, pte_t *ptep)
61 {
62 unsigned long clr = ~pte_val(pte_wrprotect(__pte(~0)));
63 unsigned long set = pte_val(pte_wrprotect(__pte(0)));
64
65 pte_update(mm, addr, ptep, clr, set, 1);
66 }
67
68 #ifdef CONFIG_PPC_4K_PAGES
arch_make_huge_pte(pte_t entry,struct vm_area_struct * vma,struct page * page,int writable)69 static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,
70 struct page *page, int writable)
71 {
72 size_t size = huge_page_size(hstate_vma(vma));
73
74 if (size == SZ_16K)
75 return __pte(pte_val(entry) & ~_PAGE_HUGE);
76 else
77 return entry;
78 }
79 #define arch_make_huge_pte arch_make_huge_pte
80 #endif
81
82 #endif /* _ASM_POWERPC_NOHASH_32_HUGETLB_8XX_H */
83