/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (C) 2019 SiFive */ #ifndef _ASM_RISCV_SET_MEMORY_H #define _ASM_RISCV_SET_MEMORY_H #ifndef __ASSEMBLY__ /* * Functions to change memory attributes. */ #ifdef CONFIG_MMU int set_memory_ro(unsigned long addr, int numpages); int set_memory_rw(unsigned long addr, int numpages); int set_memory_x(unsigned long addr, int numpages); int set_memory_nx(unsigned long addr, int numpages); #else static inline int set_memory_ro(unsigned long addr, int numpages) { return 0; } static inline int set_memory_rw(unsigned long addr, int numpages) { return 0; } static inline int set_memory_x(unsigned long addr, int numpages) { return 0; } static inline int set_memory_nx(unsigned long addr, int numpages) { return 0; } #endif int set_direct_map_invalid_noflush(struct page *page); int set_direct_map_default_noflush(struct page *page); #endif /* __ASSEMBLY__ */ #ifdef CONFIG_ARCH_HAS_STRICT_KERNEL_RWX #ifdef CONFIG_64BIT #define SECTION_ALIGN (1 << 21) #else #define SECTION_ALIGN (1 << 22) #endif #else /* !CONFIG_ARCH_HAS_STRICT_KERNEL_RWX */ #define SECTION_ALIGN L1_CACHE_BYTES #endif /* CONFIG_ARCH_HAS_STRICT_KERNEL_RWX */ #endif /* _ASM_RISCV_SET_MEMORY_H */