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- /*
- * Copyright (C) 2011 Tobias Klauser <tklauser@distanz.ch>
- * Copyright (C) 2009 Wind River Systems Inc
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- */
- #ifndef _ASM_NIOS2_PGTABLE_BITS_H
- #define _ASM_NIOS2_PGTABLE_BITS_H
- /*
- * These are actual hardware defined protection bits in the tlbacc register
- * which looks like this:
- *
- * 31 30 ... 26 25 24 23 22 21 20 19 18 ... 1 0
- * ignored........ C R W X G PFN............
- */
- #define _PAGE_GLOBAL (1<<20)
- #define _PAGE_EXEC (1<<21)
- #define _PAGE_WRITE (1<<22)
- #define _PAGE_READ (1<<23)
- #define _PAGE_CACHED (1<<24) /* C: data access cacheable */
- /*
- * Software defined bits. They are ignored by the hardware and always read back
- * as zero, but can be written as non-zero.
- */
- #define _PAGE_PRESENT (1<<25) /* PTE contains a translation */
- #define _PAGE_ACCESSED (1<<26) /* page referenced */
- #define _PAGE_DIRTY (1<<27) /* dirty page */
- #endif /* _ASM_NIOS2_PGTABLE_BITS_H */
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