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_E500)
  11 #include <asm/nohash/hugetlb-e500.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 __init hugetlbpage_init_defaultsize(void);
  19
  20 int slice_is_hugepage_only_range(struct mm_struct *mm, unsigned long addr,
  21                            unsigned long len);
  22
  23 static inline int is_hugepage_only_range(struct mm_struct *mm,
  24                                          unsigned long addr,
  25                                          unsigned long len)
  26 {
  27         if (IS_ENABLED(CONFIG_PPC_64S_HASH_MMU) && !radix_enabled())
  28                 return slice_is_hugepage_only_range(mm, addr, len);
  29         return 0;
  30 }
  31 #define is_hugepage_only_range is_hugepage_only_range
  32
  33 #define __HAVE_ARCH_HUGETLB_FREE_PGD_RANGE
  34 void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long addr,
  35                             unsigned long end, unsigned long floor,
  36                             unsigned long ceiling);
  37
  38 #define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
  39 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
  40                                             unsigned long addr, pte_t *ptep)
  41 {
  42         return __pte(pte_update(mm, addr, ptep, ~0UL, 0, 1));
  43 }
  44
  45 #define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
  46 static inline pte_t huge_ptep_clear_flush(struct vm_area_struct *vma,
  47                                           unsigned long addr, pte_t *ptep)
  48 {
  49         pte_t pte;
  50
  51         pte = huge_ptep_get_and_clear(vma->vm_mm, addr, ptep);
  52         flush_hugetlb_page(vma, addr);
  53         return pte;
  54 }
  55
  56 #define __HAVE_ARCH_HUGE_PTEP_SET_ACCESS_FLAGS
  57 int huge_ptep_set_access_flags(struct vm_area_struct *vma,
  58                                unsigned long addr, pte_t *ptep,
  59                                pte_t pte, int dirty);
  60
  61 void gigantic_hugetlb_cma_reserve(void) __init;
  62 #include <asm-generic/hugetlb.h>
  63
  64 #else /* ! CONFIG_HUGETLB_PAGE */
  65 static inline void flush_hugetlb_page(struct vm_area_struct *vma,
  66                                       unsigned long vmaddr)
  67 {
  68 }
  69
  70 #define hugepd_shift(x) 0
  71 static inline pte_t *hugepte_offset(hugepd_t hpd, unsigned long addr,
  72                                     unsigned pdshift)
  73 {
  74         return NULL;
  75 }
  76
  77
  78 static inline void __init gigantic_hugetlb_cma_reserve(void)
  79 {
  80 }
  81
  82 static inline void __init hugetlbpage_init_defaultsize(void)
  83 {
  84 }
  85 #endif /* CONFIG_HUGETLB_PAGE */
  86
  87 #endif /* _ASM_POWERPC_HUGETLB_H */