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

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_POWERPC_BOOK3S_64_PGTABLE_64K_H
   3 #define _ASM_POWERPC_BOOK3S_64_PGTABLE_64K_H
   4
   5 #ifndef __ASSEMBLY__
   6 #ifdef CONFIG_HUGETLB_PAGE
   7 /*
   8  * We have PGD_INDEX_SIZ = 12 and PTE_INDEX_SIZE = 8, so that we can have
   9  * 16GB hugepage pte in PGD and 16MB hugepage pte at PMD;
  10  *
  11  * Defined in such a way that we can optimize away code block at build time
  12  * if CONFIG_HUGETLB_PAGE=n.
  13  */
  14 static inline int pmd_huge(pmd_t pmd)
  15 {
  16         /*
  17          * leaf pte for huge page
  18          */
  19         return !!(pmd_raw(pmd) & cpu_to_be64(_PAGE_PTE));
  20 }
  21
  22 static inline int pud_huge(pud_t pud)
  23 {
  24         /*
  25          * leaf pte for huge page
  26          */
  27         return !!(pud_raw(pud) & cpu_to_be64(_PAGE_PTE));
  28 }
  29
  30 static inline int pgd_huge(pgd_t pgd)
  31 {
  32         /*
  33          * leaf pte for huge page
  34          */
  35         return !!(pgd_raw(pgd) & cpu_to_be64(_PAGE_PTE));
  36 }
  37 #define pgd_huge pgd_huge
  38
  39 /*
  40  * With 64k page size, we have hugepage ptes in the pgd 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         return 0;
  47 }
  48 #define is_hugepd(pdep)                 0
  49
  50 #else /* !CONFIG_HUGETLB_PAGE */
  51 static inline int pmd_huge(pmd_t pmd) { return 0; }
  52 static inline int pud_huge(pud_t pud) { return 0; }
  53 #endif /* CONFIG_HUGETLB_PAGE */
  54
  55 static inline int remap_4k_pfn(struct vm_area_struct *vma, unsigned long addr,
  56                                unsigned long pfn, pgprot_t prot)
  57 {
  58         if (radix_enabled())
  59                 BUG();
  60         return hash__remap_4k_pfn(vma, addr, pfn, prot);
  61 }
  62 #endif  /* __ASSEMBLY__ */
  63 #endif /*_ASM_POWERPC_BOOK3S_64_PGTABLE_64K_H */