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- /* SPDX-License-Identifier: GPL-2.0-only */
- /*
- * Copyright (C) 2012 Regents of the University of California
- */
- #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 */
- /* T-HEAD C9xx extend */
- #define _PAGE_SEC (1UL << 59) /* Security */
- #define _PAGE_SHARE (1UL << 60) /* Shareable */
- #define _PAGE_BUF (1UL << 61) /* Bufferable */
- #define _PAGE_CACHE (1UL << 62) /* Cacheable */
- #define _PAGE_SO (1UL << 63) /* Strong Order */
- #define _PAGE_SPECIAL _PAGE_SOFT
- #define _PAGE_TABLE _PAGE_PRESENT
- /*
- * _PAGE_PROT_NONE is set on not-present pages (and ignored by the hardware) to
- * distinguish them from swapped out pages
- */
- #define _PAGE_PROT_NONE _PAGE_READ
- #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 | \
- _PAGE_SEC | _PAGE_SHARE | \
- _PAGE_BUF | _PAGE_CACHE | \
- _PAGE_SO ))
- #endif /* _ASM_RISCV_PGTABLE_BITS_H */
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