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43 lines
1.3 KiB
43 lines
1.3 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Copyright (C) 2012 Regents of the University of California |
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*/ |
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#ifndef _ASM_RISCV_PGTABLE_BITS_H |
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#define _ASM_RISCV_PGTABLE_BITS_H |
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/* |
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* PTE format: |
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* | XLEN-1 10 | 9 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
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* PFN reserved for SW D A G U X W R V |
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*/ |
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#define _PAGE_ACCESSED_OFFSET 6 |
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#define _PAGE_PRESENT (1 << 0) |
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#define _PAGE_READ (1 << 1) /* Readable */ |
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#define _PAGE_WRITE (1 << 2) /* Writable */ |
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#define _PAGE_EXEC (1 << 3) /* Executable */ |
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#define _PAGE_USER (1 << 4) /* User */ |
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#define _PAGE_GLOBAL (1 << 5) /* Global */ |
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#define _PAGE_ACCESSED (1 << 6) /* Set by hardware on any access */ |
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#define _PAGE_DIRTY (1 << 7) /* Set by hardware on any write */ |
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#define _PAGE_SOFT (1 << 8) /* Reserved for software */ |
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#define _PAGE_SPECIAL _PAGE_SOFT |
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#define _PAGE_TABLE _PAGE_PRESENT |
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/* |
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* _PAGE_PROT_NONE is set on not-present pages (and ignored by the hardware) to |
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* distinguish them from swapped out pages |
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*/ |
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#define _PAGE_PROT_NONE _PAGE_READ |
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#define _PAGE_PFN_SHIFT 10 |
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/* Set of bits to preserve across pte_modify() */ |
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#define _PAGE_CHG_MASK (~(unsigned long)(_PAGE_PRESENT | _PAGE_READ | \ |
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_PAGE_WRITE | _PAGE_EXEC | \ |
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_PAGE_USER | _PAGE_GLOBAL)) |
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#endif /* _ASM_RISCV_PGTABLE_BITS_H */
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