arch/sh/include/asm/pgtable-2level.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __ASM_SH_PGTABLE_2LEVEL_H
   3 #define __ASM_SH_PGTABLE_2LEVEL_H
   4
   5 #include <asm-generic/pgtable-nopmd.h>
   6
   7 /*
   8  * traditional two-level paging structure
   9  */
  10 #define PAGETABLE_LEVELS        2
  11
  12 /* PTE bits */
  13 #define PTE_MAGNITUDE           2       /* 32-bit PTEs */
  14
  15 #define PTE_SHIFT               PAGE_SHIFT
  16 #define PTE_BITS                (PTE_SHIFT - PTE_MAGNITUDE)
  17
  18 /* PGD bits */
  19 #define PGDIR_SHIFT             (PTE_SHIFT + PTE_BITS)
  20
  21 #define PTRS_PER_PGD            (PAGE_SIZE / (1 << PTE_MAGNITUDE))
  22 #define USER_PTRS_PER_PGD       (TASK_SIZE/PGDIR_SIZE)
  23
  24 #endif /* __ASM_SH_PGTABLE_2LEVEL_H */