arch/powerpc/include/asm/book3s/64/pgtable-4k.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_POWERPC_BOOK3S_64_PGTABLE_4K_H
   3 #define _ASM_POWERPC_BOOK3S_64_PGTABLE_4K_H
   4 /*
   5  * hash 4k can't share hugetlb and also doesn't support THP
   6  */
   7 #ifndef __ASSEMBLY__
   8 #ifdef CONFIG_HUGETLB_PAGE
   9 static inline int pmd_huge(pmd_t pmd)
  10 {
  11         /*
  12          * leaf pte for huge page
  13          */
  14         if (radix_enabled())
  15                 return !!(pmd_raw(pmd) & cpu_to_be64(_PAGE_PTE));
  16         return 0;
  17 }
  18
  19 static inline int pud_huge(pud_t pud)
  20 {
  21         /*
  22          * leaf pte for huge page
  23          */
  24         if (radix_enabled())
  25                 return !!(pud_raw(pud) & cpu_to_be64(_PAGE_PTE));
  26         return 0;
  27 }
  28
  29 static inline int pgd_huge(pgd_t pgd)
  30 {
  31         /*
  32          * leaf pte for huge page
  33          */
  34         if (radix_enabled())
  35                 return !!(pgd_raw(pgd) & cpu_to_be64(_PAGE_PTE));
  36         return 0;
  37 }
  38 #define pgd_huge pgd_huge
  39 /*
  40  * With radix , we have hugepage ptes in the pud and pmd entries. We don't
  41  * need to setup hugepage directory for them. Our pte and page directory format
  42  * enable us to have this enabled.
  43  */
  44 static inline int hugepd_ok(hugepd_t hpd)
  45 {
  46         if (radix_enabled())
  47                 return 0;
  48         return hash__hugepd_ok(hpd);
  49 }
  50 #define is_hugepd(hpd)          (hugepd_ok(hpd))
  51
  52 /*
  53  * 16M and 16G huge page directory tables are allocated from slab cache
  54  *
  55  */
  56 #define H_16M_CACHE_INDEX (PAGE_SHIFT + H_PTE_INDEX_SIZE + H_PMD_INDEX_SIZE - 24)
  57 #define H_16G_CACHE_INDEX                                                      \
  58         (PAGE_SHIFT + H_PTE_INDEX_SIZE + H_PMD_INDEX_SIZE + H_PUD_INDEX_SIZE - 34)
  59
  60 static inline int get_hugepd_cache_index(int index)
  61 {
  62         switch (index) {
  63         case H_16M_CACHE_INDEX:
  64                 return HTLB_16M_INDEX;
  65         case H_16G_CACHE_INDEX:
  66                 return HTLB_16G_INDEX;
  67         default:
  68                 BUG();
  69         }
  70         /* should not reach */
  71 }
  72
  73 #endif /* CONFIG_HUGETLB_PAGE */
  74
  75 #endif /* __ASSEMBLY__ */
  76
  77 #endif /*_ASM_POWERPC_BOOK3S_64_PGTABLE_4K_H */