release/src-rt-6.x.4708/linux/linux-2.6.36/arch/powerpc/include/asm/pgtable-ppc64-64k.h

   1 #ifndef _ASM_POWERPC_PGTABLE_PPC64_64K_H
   2 #define _ASM_POWERPC_PGTABLE_PPC64_64K_H
   3
   4 #include <asm-generic/pgtable-nopud.h>
   5
   6
   7 #define PTE_INDEX_SIZE  12
   8 #define PMD_INDEX_SIZE  12
   9 #define PUD_INDEX_SIZE  0
  10 #define PGD_INDEX_SIZE  4
  11
  12 #ifndef __ASSEMBLY__
  13 #define PTE_TABLE_SIZE  (sizeof(real_pte_t) << PTE_INDEX_SIZE)
  14 #define PMD_TABLE_SIZE  (sizeof(pmd_t) << PMD_INDEX_SIZE)
  15 #define PGD_TABLE_SIZE  (sizeof(pgd_t) << PGD_INDEX_SIZE)
  16 #endif  /* __ASSEMBLY__ */
  17
  18 #define PTRS_PER_PTE    (1 << PTE_INDEX_SIZE)
  19 #define PTRS_PER_PMD    (1 << PMD_INDEX_SIZE)
  20 #define PTRS_PER_PGD    (1 << PGD_INDEX_SIZE)
  21
  22 /* With 4k base page size, hugepage PTEs go at the PMD level */
  23 #define MIN_HUGEPTE_SHIFT       PAGE_SHIFT
  24
  25 /* PMD_SHIFT determines what a second-level page table entry can map */
  26 #define PMD_SHIFT       (PAGE_SHIFT + PTE_INDEX_SIZE)
  27 #define PMD_SIZE        (1UL << PMD_SHIFT)
  28 #define PMD_MASK        (~(PMD_SIZE-1))
  29
  30 /* PGDIR_SHIFT determines what a third-level page table entry can map */
  31 #define PGDIR_SHIFT     (PMD_SHIFT + PMD_INDEX_SIZE)
  32 #define PGDIR_SIZE      (1UL << PGDIR_SHIFT)
  33 #define PGDIR_MASK      (~(PGDIR_SIZE-1))
  34
  35 /* Bits to mask out from a PMD to get to the PTE page */
  36 #define PMD_MASKED_BITS         0x1ff
  37 /* Bits to mask out from a PGD/PUD to get to the PMD page */
  38 #define PUD_MASKED_BITS         0x1ff
  39
  40 #endif /* _ASM_POWERPC_PGTABLE_PPC64_64K_H */