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_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