1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __ASM_CACHEFLUSH_H 3 #define __ASM_CACHEFLUSH_H 4 5 /* Keep includes the same across arches. */ 6 #include <linux/mm.h> 7 8 /* 9 * The cache doesn't need to be flushed when TLB entries change when 10 * the cache is mapped to physical memory, not virtual memory 11 */ 12 #define flush_cache_all() do { } while (0) 13 #define flush_cache_mm(mm) do { } while (0) 14 #define flush_cache_dup_mm(mm) do { } while (0) 15 #define flush_cache_range(vma, start, end) do { } while (0) 16 #define flush_cache_page(vma, vmaddr, pfn) do { } while (0) 17 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0 18 #define flush_dcache_page(page) do { } while (0) 19 #define flush_dcache_mmap_lock(mapping) do { } while (0) 20 #define flush_dcache_mmap_unlock(mapping) do { } while (0) 21 #define flush_icache_range(start, end) do { } while (0) 22 #define flush_icache_page(vma,pg) do { } while (0) 23 #define flush_icache_user_range(vma,pg,adr,len) do { } while (0) 24 #define flush_cache_vmap(start, end) do { } while (0) 25 #define flush_cache_vunmap(start, end) do { } while (0) 26 27 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \ 28 do { \ 29 memcpy(dst, src, len); \ 30 flush_icache_user_range(vma, page, vaddr, len); \ 31 } while (0) 32 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \ 33 memcpy(dst, src, len) 34 35 #endif /* __ASM_CACHEFLUSH_H */ 36