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_val(pmd) & _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_val(pud) & _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_val(pgd) & _PAGE_PTE);
  35 }
  36 #define pgd_huge pgd_huge
  37
  38 #ifdef CONFIG_DEBUG_VM
  39 extern int hugepd_ok(hugepd_t hpd);
  40 #define is_hugepd(hpd)               (hugepd_ok(hpd))
  41 #else
  42 /*
  43  * With 64k page size, we have hugepage ptes in the pgd and pmd entries. We don't
  44  * need to setup hugepage directory for them. Our pte and page directory format
  45  * enable us to have this enabled.
  46  */
  47 static inline int hugepd_ok(hugepd_t hpd)
  48 {
  49         return 0;
  50 }
  51 #define is_hugepd(pdep)                 0
  52 #endif /* CONFIG_DEBUG_VM */
  53
  54 #endif /* CONFIG_HUGETLB_PAGE */
  55
  56 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
  57 static inline int pmd_trans_huge(pmd_t pmd)
  58 {
  59         if (radix_enabled())
  60                 return radix__pmd_trans_huge(pmd);
  61         return hash__pmd_trans_huge(pmd);
  62 }
  63
  64 #define __HAVE_ARCH_PMD_SAME
  65 static inline int pmd_same(pmd_t pmd_a, pmd_t pmd_b)
  66 {
  67         if (radix_enabled())
  68                 return radix__pmd_same(pmd_a, pmd_b);
  69         return hash__pmd_same(pmd_a, pmd_b);
  70 }
  71
  72 static inline pmd_t pmd_mkhuge(pmd_t pmd)
  73 {
  74         return hash__pmd_mkhuge(pmd);
  75 }
  76
  77 #endif /*  CONFIG_TRANSPARENT_HUGEPAGE */
  78
  79 static inline int remap_4k_pfn(struct vm_area_struct *vma, unsigned long addr,
  80                                unsigned long pfn, pgprot_t prot)
  81 {
  82         if (radix_enabled())
  83                 BUG();
  84         return hash__remap_4k_pfn(vma, addr, pfn, prot);
  85 }
  86 #endif  /* __ASSEMBLY__ */
  87 #endif /*_ASM_POWERPC_BOOK3S_64_PGTABLE_64K_H */