diff options
Diffstat (limited to 'arch/riscv/include/asm/set_memory.h')
-rw-r--r-- | arch/riscv/include/asm/set_memory.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/set_memory.h b/arch/riscv/include/asm/set_memory.h new file mode 100644 index 000000000000..4c5bae7ca01c --- /dev/null +++ b/arch/riscv/include/asm/set_memory.h @@ -0,0 +1,40 @@ +/* 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 */ |