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
  34 void book3e_hugetlb_preload(struct vm_area_struct *vma, unsigned long ea,
  35                             pte_t pte);
  36
  37 #define __HAVE_ARCH_HUGETLB_FREE_PGD_RANGE
  38 void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long addr,
  39                             unsigned long end, unsigned long floor,
  40                             unsigned long ceiling);
  41
  42 #define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
  43 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
  44                                             unsigned long addr, pte_t *ptep)
  45 {
  46 #ifdef CONFIG_PPC64
  47         return __pte(pte_update(mm, addr, ptep, ~0UL, 0, 1));
  48 #else
  49         return __pte(pte_update(ptep, ~0UL, 0));
  50 #endif
  51 }
  52
  53 #define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
  54 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
  55                                          unsigned long addr, pte_t *ptep)
  56 {
  57         huge_ptep_get_and_clear(vma->vm_mm, addr, ptep);
  58         flush_hugetlb_page(vma, addr);
  59 }
  60
  61 #define __HAVE_ARCH_HUGE_PTEP_SET_ACCESS_FLAGS
  62 int huge_ptep_set_access_flags(struct vm_area_struct *vma,
  63                                unsigned long addr, pte_t *ptep,
  64                                pte_t pte, int dirty);
  65
  66 static inline void arch_clear_hugepage_flags(struct page *page)
  67 {
  68 }
  69
  70 #include <asm-generic/hugetlb.h>
  71
  72 #else /* ! CONFIG_HUGETLB_PAGE */
  73 static inline void flush_hugetlb_page(struct vm_area_struct *vma,
  74                                       unsigned long vmaddr)
  75 {
  76 }
  77
  78 #define hugepd_shift(x) 0
  79 static inline pte_t *hugepte_offset(hugepd_t hpd, unsigned long addr,
  80                                     unsigned pdshift)
  81 {
  82         return NULL;
  83 }
  84 #endif /* CONFIG_HUGETLB_PAGE */
  85
  86 #endif /* _ASM_POWERPC_HUGETLB_H */