/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __ASM_CACHEFLUSH_H #define __ASM_CACHEFLUSH_H /* Keep includes the same across arches. */ #include #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0 /* * The cache doesn't need to be flushed when TLB entries change when * the cache is mapped to physical memory, not virtual memory */ static inline void flush_cache_all(void) { } static inline void flush_cache_mm(struct mm_struct *mm) { } static inline void flush_cache_dup_mm(struct mm_struct *mm) { } static inline void flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long end) { } static inline void flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long pfn) { } static inline void flush_dcache_page(struct page *page) { } static inline void flush_dcache_mmap_lock(struct address_space *mapping) { } static inline void flush_dcache_mmap_unlock(struct address_space *mapping) { } static inline void flush_icache_range(unsigned long start, unsigned long end) { } static inline void flush_icache_page(struct vm_area_struct *vma, struct page *page) { } static inline void flush_icache_user_range(struct vm_area_struct *vma, struct page *page, unsigned long addr, int len) { } static inline void flush_cache_vmap(unsigned long start, unsigned long end) { } static inline void flush_cache_vunmap(unsigned long start, unsigned long end) { } #define copy_to_user_page(vma, page, vaddr, dst, src, len) \ do { \ memcpy(dst, src, len); \ flush_icache_user_range(vma, page, vaddr, len); \ } while (0) #define copy_from_user_page(vma, page, vaddr, dst, src, len) \ memcpy(dst, src, len) #endif /* __ASM_CACHEFLUSH_H */