Linux kernel mirror (for testing)
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linux
1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (C) 2019 SiFive
4 */
5
6#ifndef _ASM_RISCV_SET_MEMORY_H
7#define _ASM_RISCV_SET_MEMORY_H
8
9#ifndef __ASSEMBLY__
10/*
11 * Functions to change memory attributes.
12 */
13#ifdef CONFIG_MMU
14int set_memory_ro(unsigned long addr, int numpages);
15int set_memory_rw(unsigned long addr, int numpages);
16int set_memory_x(unsigned long addr, int numpages);
17int set_memory_nx(unsigned long addr, int numpages);
18#else
19static inline int set_memory_ro(unsigned long addr, int numpages) { return 0; }
20static inline int set_memory_rw(unsigned long addr, int numpages) { return 0; }
21static inline int set_memory_x(unsigned long addr, int numpages) { return 0; }
22static inline int set_memory_nx(unsigned long addr, int numpages) { return 0; }
23#endif
24
25int set_direct_map_invalid_noflush(struct page *page);
26int set_direct_map_default_noflush(struct page *page);
27
28#endif /* __ASSEMBLY__ */
29
30#ifdef CONFIG_ARCH_HAS_STRICT_KERNEL_RWX
31#ifdef CONFIG_64BIT
32#define SECTION_ALIGN (1 << 21)
33#else
34#define SECTION_ALIGN (1 << 22)
35#endif
36#else /* !CONFIG_ARCH_HAS_STRICT_KERNEL_RWX */
37#define SECTION_ALIGN L1_CACHE_BYTES
38#endif /* CONFIG_ARCH_HAS_STRICT_KERNEL_RWX */
39
40#endif /* _ASM_RISCV_SET_MEMORY_H */