162306a36Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0-only */ 262306a36Sopenharmony_ci/* 362306a36Sopenharmony_ci * Copyright (C) 2019 SiFive 462306a36Sopenharmony_ci */ 562306a36Sopenharmony_ci 662306a36Sopenharmony_ci#ifndef _ASM_RISCV_SET_MEMORY_H 762306a36Sopenharmony_ci#define _ASM_RISCV_SET_MEMORY_H 862306a36Sopenharmony_ci 962306a36Sopenharmony_ci#ifndef __ASSEMBLY__ 1062306a36Sopenharmony_ci/* 1162306a36Sopenharmony_ci * Functions to change memory attributes. 1262306a36Sopenharmony_ci */ 1362306a36Sopenharmony_ci#ifdef CONFIG_MMU 1462306a36Sopenharmony_ciint set_memory_ro(unsigned long addr, int numpages); 1562306a36Sopenharmony_ciint set_memory_rw(unsigned long addr, int numpages); 1662306a36Sopenharmony_ciint set_memory_x(unsigned long addr, int numpages); 1762306a36Sopenharmony_ciint set_memory_nx(unsigned long addr, int numpages); 1862306a36Sopenharmony_ciint set_memory_rw_nx(unsigned long addr, int numpages); 1962306a36Sopenharmony_cistatic __always_inline int set_kernel_memory(char *startp, char *endp, 2062306a36Sopenharmony_ci int (*set_memory)(unsigned long start, 2162306a36Sopenharmony_ci int num_pages)) 2262306a36Sopenharmony_ci{ 2362306a36Sopenharmony_ci unsigned long start = (unsigned long)startp; 2462306a36Sopenharmony_ci unsigned long end = (unsigned long)endp; 2562306a36Sopenharmony_ci int num_pages = PAGE_ALIGN(end - start) >> PAGE_SHIFT; 2662306a36Sopenharmony_ci 2762306a36Sopenharmony_ci return set_memory(start, num_pages); 2862306a36Sopenharmony_ci} 2962306a36Sopenharmony_ci#else 3062306a36Sopenharmony_cistatic inline int set_memory_ro(unsigned long addr, int numpages) { return 0; } 3162306a36Sopenharmony_cistatic inline int set_memory_rw(unsigned long addr, int numpages) { return 0; } 3262306a36Sopenharmony_cistatic inline int set_memory_x(unsigned long addr, int numpages) { return 0; } 3362306a36Sopenharmony_cistatic inline int set_memory_nx(unsigned long addr, int numpages) { return 0; } 3462306a36Sopenharmony_cistatic inline int set_memory_rw_nx(unsigned long addr, int numpages) { return 0; } 3562306a36Sopenharmony_cistatic inline int set_kernel_memory(char *startp, char *endp, 3662306a36Sopenharmony_ci int (*set_memory)(unsigned long start, 3762306a36Sopenharmony_ci int num_pages)) 3862306a36Sopenharmony_ci{ 3962306a36Sopenharmony_ci return 0; 4062306a36Sopenharmony_ci} 4162306a36Sopenharmony_ci#endif 4262306a36Sopenharmony_ci 4362306a36Sopenharmony_ciint set_direct_map_invalid_noflush(struct page *page); 4462306a36Sopenharmony_ciint set_direct_map_default_noflush(struct page *page); 4562306a36Sopenharmony_cibool kernel_page_present(struct page *page); 4662306a36Sopenharmony_ci 4762306a36Sopenharmony_ci#endif /* __ASSEMBLY__ */ 4862306a36Sopenharmony_ci 4962306a36Sopenharmony_ci#ifdef CONFIG_STRICT_KERNEL_RWX 5062306a36Sopenharmony_ci#ifdef CONFIG_64BIT 5162306a36Sopenharmony_ci#define SECTION_ALIGN (1 << 21) 5262306a36Sopenharmony_ci#else 5362306a36Sopenharmony_ci#define SECTION_ALIGN (1 << 22) 5462306a36Sopenharmony_ci#endif 5562306a36Sopenharmony_ci#else /* !CONFIG_STRICT_KERNEL_RWX */ 5662306a36Sopenharmony_ci#define SECTION_ALIGN L1_CACHE_BYTES 5762306a36Sopenharmony_ci#endif /* CONFIG_STRICT_KERNEL_RWX */ 5862306a36Sopenharmony_ci 5962306a36Sopenharmony_ci#define PECOFF_SECTION_ALIGNMENT 0x1000 6062306a36Sopenharmony_ci#define PECOFF_FILE_ALIGNMENT 0x200 6162306a36Sopenharmony_ci 6262306a36Sopenharmony_ci#endif /* _ASM_RISCV_SET_MEMORY_H */ 63