| /* | |
| * Copyright (C) 2012 Regents of the University of California | |
| * | |
| * This program is free software; you can redistribute it and/or | |
| * modify it under the terms of the GNU General Public License | |
| * as published by the Free Software Foundation, version 2. | |
| * | |
| * This program is distributed in the hope that it will be useful, | |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| * GNU General Public License for more details. | |
| */ | |
| #ifndef _ASM_RISCV_PGTABLE_BITS_H | |
| #define _ASM_RISCV_PGTABLE_BITS_H | |
| /* | |
| * PTE format: | |
| * | XLEN-1 10 | 9 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| * PFN reserved for SW D A G U X W R V | |
| */ | |
| #define _PAGE_ACCESSED_OFFSET 6 | |
| #define _PAGE_PRESENT (1 << 0) | |
| #define _PAGE_READ (1 << 1) /* Readable */ | |
| #define _PAGE_WRITE (1 << 2) /* Writable */ | |
| #define _PAGE_EXEC (1 << 3) /* Executable */ | |
| #define _PAGE_USER (1 << 4) /* User */ | |
| #define _PAGE_GLOBAL (1 << 5) /* Global */ | |
| #define _PAGE_ACCESSED (1 << 6) /* Set by hardware on any access */ | |
| #define _PAGE_DIRTY (1 << 7) /* Set by hardware on any write */ | |
| #define _PAGE_SOFT (1 << 8) /* Reserved for software */ | |
| #define _PAGE_SPECIAL _PAGE_SOFT | |
| #define _PAGE_TABLE _PAGE_PRESENT | |
| #define _PAGE_PFN_SHIFT 10 | |
| /* Set of bits to preserve across pte_modify() */ | |
| #define _PAGE_CHG_MASK (~(unsigned long)(_PAGE_PRESENT | _PAGE_READ | \ | |
| _PAGE_WRITE | _PAGE_EXEC | \ | |
| _PAGE_USER | _PAGE_GLOBAL)) | |
| /* Advertise support for _PAGE_SPECIAL */ | |
| #define __HAVE_ARCH_PTE_SPECIAL | |
| #endif /* _ASM_RISCV_PGTABLE_BITS_H */ |