[thirdparty/linux.git] / arch / riscv / include / asm / set_memory.h

/* 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 */
Commit	Line	Data
d3ab332a ZL	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
00cb41d5	9	#ifndef __ASSEMBLY__
d3ab332a ZL	10	/*
	11	* Functions to change memory attributes.
	12	*/
	13	#ifdef CONFIG_MMU
	14	int set_memory_ro(unsigned long addr, int numpages);
	15	int set_memory_rw(unsigned long addr, int numpages);
	16	int set_memory_x(unsigned long addr, int numpages);
	17	int set_memory_nx(unsigned long addr, int numpages);
	18	#else
	19	static inline int set_memory_ro(unsigned long addr, int numpages) { return 0; }
	20	static inline int set_memory_rw(unsigned long addr, int numpages) { return 0; }
	21	static inline int set_memory_x(unsigned long addr, int numpages) { return 0; }
	22	static inline int set_memory_nx(unsigned long addr, int numpages) { return 0; }
	23	#endif
	24
395a21ff ZL	25	int set_direct_map_invalid_noflush(struct page *page);
	26	int set_direct_map_default_noflush(struct page *page);
	27
00cb41d5 ZL	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
d3ab332a	40	#endif /* _ASM_RISCV_SET_MEMORY_H */