1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_SPARC64_HUGETLB_H 3 #define _ASM_SPARC64_HUGETLB_H 4 5 #include <asm/page.h> 6 #include <asm-generic/hugetlb.h> 7 8 #ifdef CONFIG_HUGETLB_PAGE 9 struct pud_huge_patch_entry { 10 unsigned int addr; 11 unsigned int insn; 12 }; 13 extern struct pud_huge_patch_entry __pud_huge_patch, __pud_huge_patch_end; 14 #endif 15 16 void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, 17 pte_t *ptep, pte_t pte); 18 19 pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, 20 pte_t *ptep); 21 22 static inline int is_hugepage_only_range(struct mm_struct *mm, 23 unsigned long addr, 24 unsigned long len) { 25 return 0; 26 } 27 28 /* 29 * If the arch doesn't supply something else, assume that hugepage 30 * size aligned regions are ok without further preparation. 31 */ 32 static inline int prepare_hugepage_range(struct file *file, 33 unsigned long addr, unsigned long len) 34 { 35 struct hstate *h = hstate_file(file); 36 37 if (len & ~huge_page_mask(h)) 38 return -EINVAL; 39 if (addr & ~huge_page_mask(h)) 40 return -EINVAL; 41 return 0; 42 } 43 44 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma, 45 unsigned long addr, pte_t *ptep) 46 { 47 } 48 49 static inline int huge_pte_none(pte_t pte) 50 { 51 return pte_none(pte); 52 } 53 54 static inline pte_t huge_pte_wrprotect(pte_t pte) 55 { 56 return pte_wrprotect(pte); 57 } 58 59 static inline void huge_ptep_set_wrprotect(struct mm_struct *mm, 60 unsigned long addr, pte_t *ptep) 61 { 62 pte_t old_pte = *ptep; 63 set_huge_pte_at(mm, addr, ptep, pte_wrprotect(old_pte)); 64 } 65 66 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma, 67 unsigned long addr, pte_t *ptep, 68 pte_t pte, int dirty) 69 { 70 int changed = !pte_same(*ptep, pte); 71 if (changed) { 72 set_huge_pte_at(vma->vm_mm, addr, ptep, pte); 73 flush_tlb_page(vma, addr); 74 } 75 return changed; 76 } 77 78 static inline pte_t huge_ptep_get(pte_t *ptep) 79 { 80 return *ptep; 81 } 82 83 static inline void arch_clear_hugepage_flags(struct page *page) 84 { 85 } 86 87 void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long addr, 88 unsigned long end, unsigned long floor, 89 unsigned long ceiling); 90 91 #endif /* _ASM_SPARC64_HUGETLB_H */ 92