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59 lines
1.8 KiB
59 lines
1.8 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Copyright (C) 2019 SiFive |
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*/ |
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#ifndef _ASM_RISCV_SET_MEMORY_H |
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#define _ASM_RISCV_SET_MEMORY_H |
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#ifndef __ASSEMBLY__ |
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/* |
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* Functions to change memory attributes. |
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*/ |
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#ifdef CONFIG_MMU |
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int set_memory_ro(unsigned long addr, int numpages); |
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int set_memory_rw(unsigned long addr, int numpages); |
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int set_memory_x(unsigned long addr, int numpages); |
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int set_memory_nx(unsigned long addr, int numpages); |
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int set_memory_rw_nx(unsigned long addr, int numpages); |
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static __always_inline int set_kernel_memory(char *startp, char *endp, |
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int (*set_memory)(unsigned long start, |
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int num_pages)) |
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{ |
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unsigned long start = (unsigned long)startp; |
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unsigned long end = (unsigned long)endp; |
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int num_pages = PAGE_ALIGN(end - start) >> PAGE_SHIFT; |
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return set_memory(start, num_pages); |
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} |
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#else |
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static inline int set_memory_ro(unsigned long addr, int numpages) { return 0; } |
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static inline int set_memory_rw(unsigned long addr, int numpages) { return 0; } |
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static inline int set_memory_x(unsigned long addr, int numpages) { return 0; } |
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static inline int set_memory_nx(unsigned long addr, int numpages) { return 0; } |
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static inline int set_memory_rw_nx(unsigned long addr, int numpages) { return 0; } |
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static inline int set_kernel_memory(char *startp, char *endp, |
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int (*set_memory)(unsigned long start, |
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int num_pages)) |
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{ |
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return 0; |
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} |
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#endif |
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int set_direct_map_invalid_noflush(struct page *page); |
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int set_direct_map_default_noflush(struct page *page); |
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bool kernel_page_present(struct page *page); |
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#endif /* __ASSEMBLY__ */ |
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#ifdef CONFIG_STRICT_KERNEL_RWX |
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#ifdef CONFIG_64BIT |
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#define SECTION_ALIGN (1 << 21) |
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#else |
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#define SECTION_ALIGN (1 << 22) |
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#endif |
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#else /* !CONFIG_STRICT_KERNEL_RWX */ |
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#define SECTION_ALIGN L1_CACHE_BYTES |
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#endif /* CONFIG_STRICT_KERNEL_RWX */ |
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#endif /* _ASM_RISCV_SET_MEMORY_H */
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