arch/unicore32/include/asm/pgtable-hwdef.h

   1 /*
   2  * linux/arch/unicore32/include/asm/pgtable-hwdef.h
   3  *
   4  * Code specific to PKUnity SoC and UniCore ISA
   5  *
   6  * Copyright (C) 2001-2010 GUAN Xue-tao
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12 #ifndef __UNICORE_PGTABLE_HWDEF_H__
  13 #define __UNICORE_PGTABLE_HWDEF_H__
  14
  15 /*
  16  * Hardware page table definitions.
  17  *
  18  * + Level 1 descriptor (PMD)
  19  *   - common
  20  */
  21 #define PMD_TYPE_MASK           (3 << 0)
  22 #define PMD_TYPE_TABLE          (0 << 0)
  23 /*#define PMD_TYPE_LARGE        (1 << 0) */
  24 #define PMD_TYPE_INVALID        (2 << 0)
  25 #define PMD_TYPE_SECT           (3 << 0)
  26
  27 #define PMD_PRESENT             (1 << 2)
  28 #define PMD_YOUNG               (1 << 3)
  29
  30 /*#define PMD_SECT_DIRTY        (1 << 4) */
  31 #define PMD_SECT_CACHEABLE      (1 << 5)
  32 #define PMD_SECT_EXEC           (1 << 6)
  33 #define PMD_SECT_WRITE          (1 << 7)
  34 #define PMD_SECT_READ           (1 << 8)
  35
  36 /*
  37  * + Level 2 descriptor (PTE)
  38  *   - common
  39  */
  40 #define PTE_TYPE_MASK           (3 << 0)
  41 #define PTE_TYPE_SMALL          (0 << 0)
  42 #define PTE_TYPE_MIDDLE         (1 << 0)
  43 #define PTE_TYPE_LARGE          (2 << 0)
  44 #define PTE_TYPE_INVALID        (3 << 0)
  45
  46 #define PTE_PRESENT             (1 << 2)
  47 #define PTE_FILE                (1 << 3)        /* only when !PRESENT */
  48 #define PTE_YOUNG               (1 << 3)
  49 #define PTE_DIRTY               (1 << 4)
  50 #define PTE_CACHEABLE           (1 << 5)
  51 #define PTE_EXEC                (1 << 6)
  52 #define PTE_WRITE               (1 << 7)
  53 #define PTE_READ                (1 << 8)
  54
  55 #endif