LXR linux/arch/arm/include/asm/pgtable-hwdef.h

   1/*
   2 *  arch/arm/include/asm/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_XN             (1 << 4)        /* v6 */
  32#define PMD_SECT_AP_WRITE       (1 << 10)
  33#define PMD_SECT_AP_READ        (1 << 11)
  34#define PMD_SECT_TEX(x)         ((x) << 12)     /* v5 */
  35#define PMD_SECT_APX            (1 << 15)       /* v6 */
  36#define PMD_SECT_S              (1 << 16)       /* v6 */
  37#define PMD_SECT_nG             (1 << 17)       /* v6 */
  38#define PMD_SECT_SUPER          (1 << 18)       /* v6 */
  39
  40#define PMD_SECT_UNCACHED       (0)
  41#define PMD_SECT_BUFFERED       (PMD_SECT_BUFFERABLE)
  42#define PMD_SECT_WT             (PMD_SECT_CACHEABLE)
  43#define PMD_SECT_WB             (PMD_SECT_CACHEABLE | PMD_SECT_BUFFERABLE)
  44#define PMD_SECT_MINICACHE      (PMD_SECT_TEX(1) | PMD_SECT_CACHEABLE)
  45#define PMD_SECT_WBWA           (PMD_SECT_TEX(1) | PMD_SECT_CACHEABLE | PMD_SECT_BUFFERABLE)
  46#define PMD_SECT_NONSHARED_DEV  (PMD_SECT_TEX(2))
  47
  48/*
  49 *   - coarse table (not used)
  50 */
  51
  52/*
  53 * + Level 2 descriptor (PTE)
  54 *   - common
  55 */
  56#define PTE_TYPE_MASK           (3 << 0)
  57#define PTE_TYPE_FAULT          (0 << 0)
  58#define PTE_TYPE_LARGE          (1 << 0)
  59#define PTE_TYPE_SMALL          (2 << 0)
  60#define PTE_TYPE_EXT            (3 << 0)        /* v5 */
  61#define PTE_BUFFERABLE          (1 << 2)
  62#define PTE_CACHEABLE           (1 << 3)
  63
  64/*
  65 *   - extended small page/tiny page
  66 */
  67#define PTE_EXT_XN              (1 << 0)        /* v6 */
  68#define PTE_EXT_AP_MASK         (3 << 4)
  69#define PTE_EXT_AP0             (1 << 4)
  70#define PTE_EXT_AP1             (2 << 4)
  71#define PTE_EXT_AP_UNO_SRO      (0 << 4)
  72#define PTE_EXT_AP_UNO_SRW      (PTE_EXT_AP0)
  73#define PTE_EXT_AP_URO_SRW      (PTE_EXT_AP1)
  74#define PTE_EXT_AP_URW_SRW      (PTE_EXT_AP1|PTE_EXT_AP0)
  75#define PTE_EXT_TEX(x)          ((x) << 6)      /* v5 */
  76#define PTE_EXT_APX             (1 << 9)        /* v6 */
  77#define PTE_EXT_COHERENT        (1 << 9)        /* XScale3 */
  78#define PTE_EXT_SHARED          (1 << 10)       /* v6 */
  79#define PTE_EXT_NG              (1 << 11)       /* v6 */
  80
  81/*
  82 *   - small page
  83 */
  84#define PTE_SMALL_AP_MASK       (0xff << 4)
  85#define PTE_SMALL_AP_UNO_SRO    (0x00 << 4)
  86#define PTE_SMALL_AP_UNO_SRW    (0x55 << 4)
  87#define PTE_SMALL_AP_URO_SRW    (0xaa << 4)
  88#define PTE_SMALL_AP_URW_SRW    (0xff << 4)
  89
  90#endif
  91