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