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

   1 #ifndef _ASM_POWERPC_BOOK3S_64_PGTABLE_64K_H
   2 #define _ASM_POWERPC_BOOK3S_64_PGTABLE_64K_H
   3
   4 #ifndef __ASSEMBLY__
   5 #ifdef CONFIG_HUGETLB_PAGE
   6 /*
   7  * We have PGD_INDEX_SIZ = 12 and PTE_INDEX_SIZE = 8, so that we can have
   8  * 16GB hugepage pte in PGD and 16MB hugepage pte at PMD;
   9  *
  10  * Defined in such a way that we can optimize away code block at build time
  11  * if CONFIG_HUGETLB_PAGE=n.
  12  */
  13 static inline int pmd_huge(pmd_t pmd)
  14 {
  15         /*
  16          * leaf pte for huge page
  17          */
  18         return !!(pmd_raw(pmd) & cpu_to_be64(_PAGE_PTE));
  19 }
  20
  21 static inline int pud_huge(pud_t pud)
  22 {
  23         /*
  24          * leaf pte for huge page
  25          */
  26         return !!(pud_raw(pud) & cpu_to_be64(_PAGE_PTE));
  27 }
  28
  29 static inline int pgd_huge(pgd_t pgd)
  30 {
  31         /*
  32          * leaf pte for huge page
  33          */
  34         return !!(pgd_raw(pgd) & cpu_to_be64(_PAGE_PTE));
  35 }
  36 #define pgd_huge pgd_huge
  37
  38 /*
  39  * With 64k page size, we have hugepage ptes in the pgd and pmd entries. We don't
  40  * need to setup hugepage directory for them. Our pte and page directory format
  41  * enable us to have this enabled.
  42  */
  43 static inline int hugepd_ok(hugepd_t hpd)
  44 {
  45         return 0;
  46 }
  47 #define is_hugepd(pdep)                 0
  48
  49 #else /* !CONFIG_HUGETLB_PAGE */
  50 static inline int pmd_huge(pmd_t pmd) { return 0; }
  51 static inline int pud_huge(pud_t pud) { return 0; }
  52 #endif /* CONFIG_HUGETLB_PAGE */
  53
  54 static inline int remap_4k_pfn(struct vm_area_struct *vma, unsigned long addr,
  55                                unsigned long pfn, pgprot_t prot)
  56 {
  57         if (radix_enabled())
  58                 BUG();
  59         return hash__remap_4k_pfn(vma, addr, pfn, prot);
  60 }
  61 #endif  /* __ASSEMBLY__ */
  62 #endif /*_ASM_POWERPC_BOOK3S_64_PGTABLE_64K_H */