| /* |
| * linux/include/asm-arm/pgtable-hwdef.h |
| * |
| * Copyright (C) 1995-2002 Russell King |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| #ifndef _ASMARM_PGTABLE_HWDEF_H |
| #define _ASMARM_PGTABLE_HWDEF_H |
| |
| /* |
| * Hardware page table definitions. |
| * |
| * + Level 1 descriptor (PMD) |
| * - common |
| */ |
| #define PMD_TYPE_MASK (3 << 0) |
| #define PMD_TYPE_FAULT (0 << 0) |
| #define PMD_TYPE_TABLE (1 << 0) |
| #define PMD_TYPE_SECT (2 << 0) |
| #define PMD_BIT4 (1 << 4) |
| #define PMD_DOMAIN(x) ((x) << 5) |
| #define PMD_PROTECTION (1 << 9) /* v5 */ |
| /* |
| * - section |
| */ |
| #define PMD_SECT_BUFFERABLE (1 << 2) |
| #define PMD_SECT_CACHEABLE (1 << 3) |
| #define PMD_SECT_XN (1 << 4) /* v6 */ |
| #define PMD_SECT_AP_WRITE (1 << 10) |
| #define PMD_SECT_AP_READ (1 << 11) |
| #define PMD_SECT_TEX(x) ((x) << 12) /* v5 */ |
| #define PMD_SECT_APX (1 << 15) /* v6 */ |
| #define PMD_SECT_S (1 << 16) /* v6 */ |
| #define PMD_SECT_nG (1 << 17) /* v6 */ |
| #define PMD_SECT_SUPER (1 << 18) /* v6 */ |
| |
| #define PMD_SECT_UNCACHED (0) |
| #define PMD_SECT_BUFFERED (PMD_SECT_BUFFERABLE) |
| #define PMD_SECT_WT (PMD_SECT_CACHEABLE) |
| #define PMD_SECT_WB (PMD_SECT_CACHEABLE | PMD_SECT_BUFFERABLE) |
| #define PMD_SECT_MINICACHE (PMD_SECT_TEX(1) | PMD_SECT_CACHEABLE) |
| #define PMD_SECT_WBWA (PMD_SECT_TEX(1) | PMD_SECT_CACHEABLE | PMD_SECT_BUFFERABLE) |
| #define PMD_SECT_NONSHARED_DEV (PMD_SECT_TEX(2)) |
| |
| /* |
| * - coarse table (not used) |
| */ |
| |
| /* |
| * + Level 2 descriptor (PTE) |
| * - common |
| */ |
| #define PTE_TYPE_MASK (3 << 0) |
| #define PTE_TYPE_FAULT (0 << 0) |
| #define PTE_TYPE_LARGE (1 << 0) |
| #define PTE_TYPE_SMALL (2 << 0) |
| #define PTE_TYPE_EXT (3 << 0) /* v5 */ |
| #define PTE_BUFFERABLE (1 << 2) |
| #define PTE_CACHEABLE (1 << 3) |
| |
| /* |
| * - extended small page/tiny page |
| */ |
| #define PTE_EXT_XN (1 << 0) /* v6 */ |
| #define PTE_EXT_AP_MASK (3 << 4) |
| #define PTE_EXT_AP0 (1 << 4) |
| #define PTE_EXT_AP1 (2 << 4) |
| #define PTE_EXT_AP_UNO_SRO (0 << 4) |
| #define PTE_EXT_AP_UNO_SRW (PTE_EXT_AP0) |
| #define PTE_EXT_AP_URO_SRW (PTE_EXT_AP1) |
| #define PTE_EXT_AP_URW_SRW (PTE_EXT_AP1|PTE_EXT_AP0) |
| #define PTE_EXT_TEX(x) ((x) << 6) /* v5 */ |
| #define PTE_EXT_APX (1 << 9) /* v6 */ |
| #define PTE_EXT_COHERENT (1 << 9) /* XScale3 */ |
| #define PTE_EXT_SHARED (1 << 10) /* v6 */ |
| #define PTE_EXT_NG (1 << 11) /* v6 */ |
| |
| /* |
| * - small page |
| */ |
| #define PTE_SMALL_AP_MASK (0xff << 4) |
| #define PTE_SMALL_AP_UNO_SRO (0x00 << 4) |
| #define PTE_SMALL_AP_UNO_SRW (0x55 << 4) |
| #define PTE_SMALL_AP_URO_SRW (0xaa << 4) |
| #define PTE_SMALL_AP_URW_SRW (0xff << 4) |
| |
| #endif |
