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

   1 #ifndef _ASM_POWERPC_BOOK3S_64_HASH_4K_H
   2 #define _ASM_POWERPC_BOOK3S_64_HASH_4K_H
   3 /*
   4  * Entries per page directory level.  The PTE level must use a 64b record
   5  * for each page table entry.  The PMD and PGD level use a 32b record for
   6  * each entry by assuming that each entry is page aligned.
   7  */
   8 #define H_PTE_INDEX_SIZE  9
   9 #define H_PMD_INDEX_SIZE  7
  10 #define H_PUD_INDEX_SIZE  9
  11 #define H_PGD_INDEX_SIZE  9
  12
  13 #ifndef __ASSEMBLY__
  14 #define H_PTE_TABLE_SIZE        (sizeof(pte_t) << H_PTE_INDEX_SIZE)
  15 #define H_PMD_TABLE_SIZE        (sizeof(pmd_t) << H_PMD_INDEX_SIZE)
  16 #define H_PUD_TABLE_SIZE        (sizeof(pud_t) << H_PUD_INDEX_SIZE)
  17 #define H_PGD_TABLE_SIZE        (sizeof(pgd_t) << H_PGD_INDEX_SIZE)
  18
  19 /* With 4k base page size, hugepage PTEs go at the PMD level */
  20 #define MIN_HUGEPTE_SHIFT       PMD_SHIFT
  21
  22 /* PTE flags to conserve for HPTE identification */
  23 #define _PAGE_HPTEFLAGS (H_PAGE_BUSY | H_PAGE_HASHPTE | \
  24                          H_PAGE_F_SECOND | H_PAGE_F_GIX)
  25 /*
  26  * Not supported by 4k linux page size
  27  */
  28 #define H_PAGE_4K_PFN   0x0
  29 #define H_PAGE_THP_HUGE 0x0
  30 #define H_PAGE_COMBO    0x0
  31 #define H_PTE_FRAG_NR   0
  32 #define H_PTE_FRAG_SIZE_SHIFT  0
  33 /*
  34  * On all 4K setups, remap_4k_pfn() equates to remap_pfn_range()
  35  */
  36 #define remap_4k_pfn(vma, addr, pfn, prot)      \
  37         remap_pfn_range((vma), (addr), (pfn), PAGE_SIZE, (prot))
  38
  39 #ifdef CONFIG_HUGETLB_PAGE
  40 static inline int hash__hugepd_ok(hugepd_t hpd)
  41 {
  42         /*
  43          * if it is not a pte and have hugepd shift mask
  44          * set, then it is a hugepd directory pointer
  45          */
  46         if (!(hpd.pd & _PAGE_PTE) &&
  47             ((hpd.pd & HUGEPD_SHIFT_MASK) != 0))
  48                 return true;
  49         return false;
  50 }
  51 #endif
  52
  53 #endif /* !__ASSEMBLY__ */
  54
  55 #endif /* _ASM_POWERPC_BOOK3S_64_HASH_4K_H */