include/asm-arm/pgtable-hwdef.h

   1 /*
   2  *  linux/include/asm-arm/pgtable-hwdef.h
   3  *
   4  *  Copyright (C) 1995-2002 Russell King
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10 #ifndef _ASMARM_PGTABLE_HWDEF_H
  11 #define _ASMARM_PGTABLE_HWDEF_H
  12
  13 /*
  14  * Hardware page table definitions.
  15  *
  16  * + Level 1 descriptor (PMD)
  17  *   - common
  18  */
  19 #define PMD_TYPE_MASK           (3 << 0)
  20 #define PMD_TYPE_FAULT          (0 << 0)
  21 #define PMD_TYPE_TABLE          (1 << 0)
  22 #define PMD_TYPE_SECT           (2 << 0)
  23 #define PMD_BIT4                (1 << 4)
  24 #define PMD_DOMAIN(x)           ((x) << 5)
  25 #define PMD_PROTECTION          (1 << 9)        /* v5 */
  26 /*
  27  *   - section
  28  */
  29 #define PMD_SECT_BUFFERABLE     (1 << 2)
  30 #define PMD_SECT_CACHEABLE      (1 << 3)
  31 #define PMD_SECT_AP_WRITE       (1 << 10)
  32 #define PMD_SECT_AP_READ        (1 << 11)
  33 #define PMD_SECT_TEX(x)         ((x) << 12)     /* v5 */
  34 #define PMD_SECT_APX            (1 << 15)       /* v6 */
  35 #define PMD_SECT_S              (1 << 16)       /* v6 */
  36 #define PMD_SECT_nG             (1 << 17)       /* v6 */
  37 #define PMD_SECT_SUPER          (1 << 18)       /* v6 */
  38
  39 #define PMD_SECT_UNCACHED       (0)
  40 #define PMD_SECT_BUFFERED       (PMD_SECT_BUFFERABLE)
  41 #define PMD_SECT_WT             (PMD_SECT_CACHEABLE)
  42 #define PMD_SECT_WB             (PMD_SECT_CACHEABLE | PMD_SECT_BUFFERABLE)
  43 #define PMD_SECT_MINICACHE      (PMD_SECT_TEX(1) | PMD_SECT_CACHEABLE)
  44 #define PMD_SECT_WBWA           (PMD_SECT_TEX(1) | PMD_SECT_CACHEABLE | PMD_SECT_BUFFERABLE)
  45 #define PMD_SECT_NONSHARED_DEV  (PMD_SECT_TEX(2))
  46
  47 /*
  48  *   - coarse table (not used)
  49  */
  50
  51 /*
  52  * + Level 2 descriptor (PTE)
  53  *   - common
  54  */
  55 #define PTE_TYPE_MASK           (3 << 0)
  56 #define PTE_TYPE_FAULT          (0 << 0)
  57 #define PTE_TYPE_LARGE          (1 << 0)
  58 #define PTE_TYPE_SMALL          (2 << 0)
  59 #define PTE_TYPE_EXT            (3 << 0)        /* v5 */
  60 #define PTE_BUFFERABLE          (1 << 2)
  61 #define PTE_CACHEABLE           (1 << 3)
  62
  63 /*
  64  *   - extended small page/tiny page
  65  */
  66 #define PTE_EXT_XN              (1 << 0)        /* v6 */
  67 #define PTE_EXT_AP_MASK         (3 << 4)
  68 #define PTE_EXT_AP0             (1 << 4)
  69 #define PTE_EXT_AP1             (2 << 4)
  70 #define PTE_EXT_AP_UNO_SRO      (0 << 4)
  71 #define PTE_EXT_AP_UNO_SRW      (PTE_EXT_AP0)
  72 #define PTE_EXT_AP_URO_SRW      (PTE_EXT_AP1)
  73 #define PTE_EXT_AP_URW_SRW      (PTE_EXT_AP1|PTE_EXT_AP0)
  74 #define PTE_EXT_TEX(x)          ((x) << 6)      /* v5 */
  75 #define PTE_EXT_APX             (1 << 9)        /* v6 */
  76 #define PTE_EXT_COHERENT        (1 << 9)        /* XScale3 */
  77 #define PTE_EXT_SHARED          (1 << 10)       /* v6 */
  78 #define PTE_EXT_NG              (1 << 11)       /* v6 */
  79
  80 /*
  81  *   - small page
  82  */
  83 #define PTE_SMALL_AP_MASK       (0xff << 4)
  84 #define PTE_SMALL_AP_UNO_SRO    (0x00 << 4)
  85 #define PTE_SMALL_AP_UNO_SRW    (0x55 << 4)
  86 #define PTE_SMALL_AP_URO_SRW    (0xaa << 4)
  87 #define PTE_SMALL_AP_URW_SRW    (0xff << 4)
  88
  89 #endif