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 #define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
  46 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
  47                                          unsigned long addr, pte_t *ptep)
  48 {
  49 }
  50
  51 static inline int huge_pte_none(pte_t pte)
  52 {
  53         return pte_none(pte);
  54 }
  55
  56 static inline pte_t huge_pte_wrprotect(pte_t pte)
  57 {
  58         return pte_wrprotect(pte);
  59 }
  60
  61 static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
  62                                            unsigned long addr, pte_t *ptep)
  63 {
  64         pte_t old_pte = *ptep;
  65         set_huge_pte_at(mm, addr, ptep, pte_wrprotect(old_pte));
  66 }
  67
  68 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
  69                                              unsigned long addr, pte_t *ptep,
  70                                              pte_t pte, int dirty)
  71 {
  72         int changed = !pte_same(*ptep, pte);
  73         if (changed) {
  74                 set_huge_pte_at(vma->vm_mm, addr, ptep, pte);
  75                 flush_tlb_page(vma, addr);
  76         }
  77         return changed;
  78 }
  79
  80 static inline pte_t huge_ptep_get(pte_t *ptep)
  81 {
  82         return *ptep;
  83 }
  84
  85 static inline void arch_clear_hugepage_flags(struct page *page)
  86 {
  87 }
  88
  89 #define __HAVE_ARCH_HUGETLB_FREE_PGD_RANGE
  90 void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long addr,
  91                             unsigned long end, unsigned long floor,
  92                             unsigned long ceiling);
  93
  94 #include <asm-generic/hugetlb.h>
  95
  96 #endif /* _ASM_SPARC64_HUGETLB_H */