arch/powerpc/include/asm/hugetlb.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_POWERPC_HUGETLB_H
   3 #define _ASM_POWERPC_HUGETLB_H
   4
   5 #ifdef CONFIG_HUGETLB_PAGE
   6 #include <asm/page.h>
   7
   8 #ifdef CONFIG_PPC_BOOK3S_64
   9 #include <asm/book3s/64/hugetlb.h>
  10 #elif defined(CONFIG_PPC_FSL_BOOK3E)
  11 #include <asm/nohash/hugetlb-book3e.h>
  12 #elif defined(CONFIG_PPC_8xx)
  13 #include <asm/nohash/32/hugetlb-8xx.h>
  14 #endif /* CONFIG_PPC_BOOK3S_64 */
  15
  16 extern bool hugetlb_disabled;
  17
  18 void hugetlbpage_init_default(void);
  19
  20 void flush_dcache_icache_hugepage(struct page *page);
  21
  22 int slice_is_hugepage_only_range(struct mm_struct *mm, unsigned long addr,
  23                            unsigned long len);
  24
  25 static inline int is_hugepage_only_range(struct mm_struct *mm,
  26                                          unsigned long addr,
  27                                          unsigned long len)
  28 {
  29         if (IS_ENABLED(CONFIG_PPC_MM_SLICES) && !radix_enabled())
  30                 return slice_is_hugepage_only_range(mm, addr, len);
  31         return 0;
  32 }
  33 #define is_hugepage_only_range is_hugepage_only_range
  34
  35 #define __HAVE_ARCH_HUGETLB_FREE_PGD_RANGE
  36 void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long addr,
  37                             unsigned long end, unsigned long floor,
  38                             unsigned long ceiling);
  39
  40 #define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
  41 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
  42                                             unsigned long addr, pte_t *ptep)
  43 {
  44 #ifdef CONFIG_PPC64
  45         return __pte(pte_update(mm, addr, ptep, ~0UL, 0, 1));
  46 #else
  47         return __pte(pte_update(ptep, ~0UL, 0));
  48 #endif
  49 }
  50
  51 #define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
  52 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
  53                                          unsigned long addr, pte_t *ptep)
  54 {
  55         huge_ptep_get_and_clear(vma->vm_mm, addr, ptep);
  56         flush_hugetlb_page(vma, addr);
  57 }
  58
  59 #define __HAVE_ARCH_HUGE_PTEP_SET_ACCESS_FLAGS
  60 int huge_ptep_set_access_flags(struct vm_area_struct *vma,
  61                                unsigned long addr, pte_t *ptep,
  62                                pte_t pte, int dirty);
  63
  64 static inline void arch_clear_hugepage_flags(struct page *page)
  65 {
  66 }
  67
  68 #include <asm-generic/hugetlb.h>
  69
  70 #else /* ! CONFIG_HUGETLB_PAGE */
  71 static inline void flush_hugetlb_page(struct vm_area_struct *vma,
  72                                       unsigned long vmaddr)
  73 {
  74 }
  75
  76 #define hugepd_shift(x) 0
  77 static inline pte_t *hugepte_offset(hugepd_t hpd, unsigned long addr,
  78                                     unsigned pdshift)
  79 {
  80         return NULL;
  81 }
  82 #endif /* CONFIG_HUGETLB_PAGE */
  83
  84 #endif /* _ASM_POWERPC_HUGETLB_H */