blob: f896708e833127d12e4cb9851b0890a8d7c5d922 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
|
/* 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
#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
/*
* _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_GLOBAL
/* Used for swap PTEs only. */
#define _PAGE_SWP_EXCLUSIVE _PAGE_ACCESSED
#define _PAGE_PFN_SHIFT 10
/*
* when all of R/W/X are zero, the PTE is a pointer to the next level
* of the page table; otherwise, it is a leaf PTE.
*/
#define _PAGE_LEAF (_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC)
#endif /* _ASM_RISCV_PGTABLE_BITS_H */
|
