60 lines
1.8 KiB
C
60 lines
1.8 KiB
C
|
/* 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);
|
||
|
|
int set_memory_rw_nx(unsigned long addr, int numpages);
|
||
|
|
static __always_inline int set_kernel_memory(char *startp, char *endp,
|
||
|
|
int (*set_memory)(unsigned long start,
|
||
|
|
int num_pages))
|
||
|
|
{
|
||
|
|
unsigned long start = (unsigned long)startp;
|
||
|
|
unsigned long end = (unsigned long)endp;
|
||
|
|
int num_pages = PAGE_ALIGN(end - start) >> PAGE_SHIFT;
|
||
|
|
|
||
|
|
return set_memory(start, num_pages);
|
||
|
|
}
|
||
|
|
#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; }
|
||
|
|
static inline int set_memory_rw_nx(unsigned long addr, int numpages) { return 0; }
|
||
|
|
static inline int set_kernel_memory(char *startp, char *endp,
|
||
|
|
int (*set_memory)(unsigned long start,
|
||
|
|
int num_pages))
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
int set_direct_map_invalid_noflush(struct page *page);
|
||
|
|
int set_direct_map_default_noflush(struct page *page);
|
||
|
|
bool kernel_page_present(struct page *page);
|
||
|
|
|
||
|
|
#endif /* __ASSEMBLY__ */
|
||
|
|
|
||
|
|
#ifdef CONFIG_STRICT_KERNEL_RWX
|
||
|
|
#ifdef CONFIG_64BIT
|
||
|
|
#define SECTION_ALIGN (1 << 21)
|
||
|
|
#else
|
||
|
|
#define SECTION_ALIGN (1 << 22)
|
||
|
|
#endif
|
||
|
|
#else /* !CONFIG_STRICT_KERNEL_RWX */
|
||
|
|
#define SECTION_ALIGN L1_CACHE_BYTES
|
||
|
|
#endif /* CONFIG_STRICT_KERNEL_RWX */
|
||
|
|
|
||
|
|
#endif /* _ASM_RISCV_SET_MEMORY_H */
|