arch/sparc/include/asm/hugetlb.h

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