| Russell King | 74945c8 | 2006-03-16 14:44:36 +0000 | [diff] [blame] | 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_SHARED (1 << 10) /* v6 */ |
| 77 | #define PTE_EXT_NG (1 << 11) /* v6 */ |
| 78 | |
| 79 | /* |
| 80 | * - small page |
| 81 | */ |
| 82 | #define PTE_SMALL_AP_MASK (0xff << 4) |
| 83 | #define PTE_SMALL_AP_UNO_SRO (0x00 << 4) |
| 84 | #define PTE_SMALL_AP_UNO_SRW (0x55 << 4) |
| 85 | #define PTE_SMALL_AP_URO_SRW (0xaa << 4) |
| 86 | #define PTE_SMALL_AP_URW_SRW (0xff << 4) |
| 87 | |
| 88 | #endif |