LXR linux/arch/arm/include/asm/pgtable-2level-hwdef.h

   1/*
   2 *  arch/arm/include/asm/pgtable-2level-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 _ASM_PGTABLE_2LEVEL_HWDEF_H
  11#define _ASM_PGTABLE_2LEVEL_HWDEF_H
  12
  13/*
  14 * Hardware page table definitions.
  15 *
  16 * + Level 1 descriptor (PMD)
  17 *   - common
  18 */
  19#define PMD_TYPE_MASK           (_AT(pmdval_t, 3) << 0)
  20#define PMD_TYPE_FAULT          (_AT(pmdval_t, 0) << 0)
  21#define PMD_TYPE_TABLE          (_AT(pmdval_t, 1) << 0)
  22#define PMD_TYPE_SECT           (_AT(pmdval_t, 2) << 0)
  23#define PMD_BIT4                (_AT(pmdval_t, 1) << 4)
  24#define PMD_DOMAIN(x)           (_AT(pmdval_t, (x)) << 5)
  25#define PMD_PROTECTION          (_AT(pmdval_t, 1) << 9)         /* v5 */
  26/*
  27 *   - section
  28 */
  29#define PMD_SECT_BUFFERABLE     (_AT(pmdval_t, 1) << 2)
  30#define PMD_SECT_CACHEABLE      (_AT(pmdval_t, 1) << 3)
  31#define PMD_SECT_XN             (_AT(pmdval_t, 1) << 4)         /* v6 */
  32#define PMD_SECT_AP_WRITE       (_AT(pmdval_t, 1) << 10)
  33#define PMD_SECT_AP_READ        (_AT(pmdval_t, 1) << 11)
  34#define PMD_SECT_TEX(x)         (_AT(pmdval_t, (x)) << 12)      /* v5 */
  35#define PMD_SECT_APX            (_AT(pmdval_t, 1) << 15)        /* v6 */
  36#define PMD_SECT_S              (_AT(pmdval_t, 1) << 16)        /* v6 */
  37#define PMD_SECT_nG             (_AT(pmdval_t, 1) << 17)        /* v6 */
  38#define PMD_SECT_SUPER          (_AT(pmdval_t, 1) << 18)        /* v6 */
  39#define PMD_SECT_AF             (_AT(pmdval_t, 0))
  40
  41#define PMD_SECT_UNCACHED       (_AT(pmdval_t, 0))
  42#define PMD_SECT_BUFFERED       (PMD_SECT_BUFFERABLE)
  43#define PMD_SECT_WT             (PMD_SECT_CACHEABLE)
  44#define PMD_SECT_WB             (PMD_SECT_CACHEABLE | PMD_SECT_BUFFERABLE)
  45#define PMD_SECT_MINICACHE      (PMD_SECT_TEX(1) | PMD_SECT_CACHEABLE)
  46#define PMD_SECT_WBWA           (PMD_SECT_TEX(1) | PMD_SECT_CACHEABLE | PMD_SECT_BUFFERABLE)
  47#define PMD_SECT_NONSHARED_DEV  (PMD_SECT_TEX(2))
  48
  49/*
  50 *   - coarse table (not used)
  51 */
  52
  53/*
  54 * + Level 2 descriptor (PTE)
  55 *   - common
  56 */
  57#define PTE_TYPE_MASK           (_AT(pteval_t, 3) << 0)
  58#define PTE_TYPE_FAULT          (_AT(pteval_t, 0) << 0)
  59#define PTE_TYPE_LARGE          (_AT(pteval_t, 1) << 0)
  60#define PTE_TYPE_SMALL          (_AT(pteval_t, 2) << 0)
  61#define PTE_TYPE_EXT            (_AT(pteval_t, 3) << 0)         /* v5 */
  62#define PTE_BUFFERABLE          (_AT(pteval_t, 1) << 2)
  63#define PTE_CACHEABLE           (_AT(pteval_t, 1) << 3)
  64
  65/*
  66 *   - extended small page/tiny page
  67 */
  68#define PTE_EXT_XN              (_AT(pteval_t, 1) << 0)         /* v6 */
  69#define PTE_EXT_AP_MASK         (_AT(pteval_t, 3) << 4)
  70#define PTE_EXT_AP0             (_AT(pteval_t, 1) << 4)
  71#define PTE_EXT_AP1             (_AT(pteval_t, 2) << 4)
  72#define PTE_EXT_AP_UNO_SRO      (_AT(pteval_t, 0) << 4)
  73#define PTE_EXT_AP_UNO_SRW      (PTE_EXT_AP0)
  74#define PTE_EXT_AP_URO_SRW      (PTE_EXT_AP1)
  75#define PTE_EXT_AP_URW_SRW      (PTE_EXT_AP1|PTE_EXT_AP0)
  76#define PTE_EXT_TEX(x)          (_AT(pteval_t, (x)) << 6)       /* v5 */
  77#define PTE_EXT_APX             (_AT(pteval_t, 1) << 9)         /* v6 */
  78#define PTE_EXT_COHERENT        (_AT(pteval_t, 1) << 9)         /* XScale3 */
  79#define PTE_EXT_SHARED          (_AT(pteval_t, 1) << 10)        /* v6 */
  80#define PTE_EXT_NG              (_AT(pteval_t, 1) << 11)        /* v6 */
  81
  82/*
  83 *   - small page
  84 */
  85#define PTE_SMALL_AP_MASK       (_AT(pteval_t, 0xff) << 4)
  86#define PTE_SMALL_AP_UNO_SRO    (_AT(pteval_t, 0x00) << 4)
  87#define PTE_SMALL_AP_UNO_SRW    (_AT(pteval_t, 0x55) << 4)
  88#define PTE_SMALL_AP_URO_SRW    (_AT(pteval_t, 0xaa) << 4)
  89#define PTE_SMALL_AP_URW_SRW    (_AT(pteval_t, 0xff) << 4)
  90
  91#define PHYS_MASK               (~0UL)
  92
  93#endif
  94