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- /* SPDX-License-Identifier: GPL-2.0 */
- #ifndef __ASM_CACHEFLUSH_H
- #define __ASM_CACHEFLUSH_H
- /* Keep includes the same across arches. */
- #include <linux/mm.h>
- #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
- */
- #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 flush_dcache_page
- static inline void flush_dcache_page(struct page *page)
- {
- }
- #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_page
- static inline void flush_icache_page(struct vm_area_struct *vma,
- struct page *page)
- {
- }
- #endif
- #ifndef flush_icache_user_range
- static inline void flush_icache_user_range(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_range(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_CACHEFLUSH_H */
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