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