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 #define __HAVE_ARCH_HUGE_SET_HUGE_PTE_AT
  16 void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
  17                      pte_t *ptep, pte_t pte);
  18
  19 #define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
  20 pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
  21                               pte_t *ptep);
  22
  23 static inline int is_hugepage_only_range(struct mm_struct *mm,
  24                                          unsigned long addr,
  25                                          unsigned long len) {
  26         return 0;
  27 }
  28
  29 /*
  30  * If the arch doesn't supply something else, assume that hugepage
  31  * size aligned regions are ok without further preparation.
  32  */
  33 static inline int prepare_hugepage_range(struct file *file,
  34                         unsigned long addr, unsigned long len)
  35 {
  36         struct hstate *h = hstate_file(file);
  37
  38         if (len & ~huge_page_mask(h))
  39                 return -EINVAL;
  40         if (addr & ~huge_page_mask(h))
  41                 return -EINVAL;
  42         return 0;
  43 }
  44
  45 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
  46                                          unsigned long addr, pte_t *ptep)
  47 {
  48 }
  49
  50 static inline int huge_pte_none(pte_t pte)
  51 {
  52         return pte_none(pte);
  53 }
  54
  55 static inline pte_t huge_pte_wrprotect(pte_t pte)
  56 {
  57         return pte_wrprotect(pte);
  58 }
  59
  60 static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
  61                                            unsigned long addr, pte_t *ptep)
  62 {
  63         pte_t old_pte = *ptep;
  64         set_huge_pte_at(mm, addr, ptep, pte_wrprotect(old_pte));
  65 }
  66
  67 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
  68                                              unsigned long addr, pte_t *ptep,
  69                                              pte_t pte, int dirty)
  70 {
  71         int changed = !pte_same(*ptep, pte);
  72         if (changed) {
  73                 set_huge_pte_at(vma->vm_mm, addr, ptep, pte);
  74                 flush_tlb_page(vma, addr);
  75         }
  76         return changed;
  77 }
  78
  79 static inline pte_t huge_ptep_get(pte_t *ptep)
  80 {
  81         return *ptep;
  82 }
  83
  84 static inline void arch_clear_hugepage_flags(struct page *page)
  85 {
  86 }
  87
  88 #define __HAVE_ARCH_HUGETLB_FREE_PGD_RANGE
  89 void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long addr,
  90                             unsigned long end, unsigned long floor,
  91                             unsigned long ceiling);
  92
  93 #include <asm-generic/hugetlb.h>
  94
  95 #endif /* _ASM_SPARC64_HUGETLB_H */