projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| cbd15b3f LFT |
1 | /* |
| 2 | * Copyright (C) 2011 Tobias Klauser <tklauser@distanz.ch> | |
| 3 | * Copyright (C) 2009 Wind River Systems Inc | |
| 4 | * | |
| 5 | * This file is subject to the terms and conditions of the GNU General Public | |
| 6 | * License. See the file "COPYING" in the main directory of this archive | |
| 7 | * for more details. | |
| 8 | */ | |
| 9 | ||
| 10 | #ifndef _ASM_NIOS2_PGTABLE_BITS_H | |
| 11 | #define _ASM_NIOS2_PGTABLE_BITS_H | |
| 12 | ||
| 13 | /* | |
| 14 | * These are actual hardware defined protection bits in the tlbacc register | |
| 15 | * which looks like this: | |
| 16 | * | |
| 17 | * 31 30 ... 26 25 24 23 22 21 20 19 18 ... 1 0 | |
| 18 | * ignored........ C R W X G PFN............ | |
| 19 | */ | |
| 20 | #define _PAGE_GLOBAL (1<<20) | |
| 21 | #define _PAGE_EXEC (1<<21) | |
| 22 | #define _PAGE_WRITE (1<<22) | |
| 23 | #define _PAGE_READ (1<<23) | |
| 24 | #define _PAGE_CACHED (1<<24) /* C: data access cacheable */ | |
| 25 | ||
| 26 | /* | |
| 27 | * Software defined bits. They are ignored by the hardware and always read back | |
| 28 | * as zero, but can be written as non-zero. | |
| 29 | */ | |
| 30 | #define _PAGE_PRESENT (1<<25) /* PTE contains a translation */ | |
| 31 | #define _PAGE_ACCESSED (1<<26) /* page referenced */ | |
| 32 | #define _PAGE_DIRTY (1<<27) /* dirty page */ | |
| cbd15b3f LFT |
33 | |
| 34 | #endif /* _ASM_NIOS2_PGTABLE_BITS_H */ |