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