root/arch/powerpc/include/asm/book3s/64/radix-64k.h

INCLUDED FROM

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_POWERPC_PGTABLE_RADIX_64K_H
   3 #define _ASM_POWERPC_PGTABLE_RADIX_64K_H
   4 
   5 /*
   6  * For 64K page size supported index is 13/9/9/5
   7  */
   8 #define RADIX_PTE_INDEX_SIZE   5  // size: 8B <<  5 = 256B, maps 2^5  x   64K =   2MB
   9 #define RADIX_PMD_INDEX_SIZE   9  // size: 8B <<  9 =  4KB, maps 2^9  x   2MB =   1GB
  10 #define RADIX_PUD_INDEX_SIZE   9  // size: 8B <<  9 =  4KB, maps 2^9  x   1GB = 512GB
  11 #define RADIX_PGD_INDEX_SIZE  13  // size: 8B << 13 = 64KB, maps 2^13 x 512GB =   4PB
  12 
  13 /*
  14  * We use a 256 byte PTE page fragment in radix
  15  * 8 bytes per each PTE entry.
  16  */
  17 #define RADIX_PTE_FRAG_SIZE_SHIFT  (RADIX_PTE_INDEX_SIZE + 3)
  18 #define RADIX_PTE_FRAG_NR       (PAGE_SIZE >> RADIX_PTE_FRAG_SIZE_SHIFT)
  19 
  20 #define RADIX_PMD_FRAG_SIZE_SHIFT  (RADIX_PMD_INDEX_SIZE + 3)
  21 #define RADIX_PMD_FRAG_NR       (PAGE_SIZE >> RADIX_PMD_FRAG_SIZE_SHIFT)
  22 
  23 #endif /* _ASM_POWERPC_PGTABLE_RADIX_64K_H */