1 /* SPDX-License-Identifier: GPL-2.0 */
2 
3 #ifndef __ABI_CSKY_CACHEFLUSH_H
4 #define __ABI_CSKY_CACHEFLUSH_H
5 
6 /* Keep includes the same across arches.  */
7 #include <linux/mm.h>
8 
9 /*
10  * The cache doesn't need to be flushed when TLB entries change when
11  * the cache is mapped to physical memory, not virtual memory
12  */
13 #define flush_cache_all()			do { } while (0)
14 #define flush_cache_mm(mm)			do { } while (0)
15 #define flush_cache_dup_mm(mm)			do { } while (0)
16 #define flush_cache_range(vma, start, end)	do { } while (0)
17 #define flush_cache_page(vma, vmaddr, pfn)	do { } while (0)
18 
19 #define PG_dcache_clean		PG_arch_1
20 
21 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
flush_dcache_page(struct page * page)22 static inline void flush_dcache_page(struct page *page)
23 {
24 	if (test_bit(PG_dcache_clean, &page->flags))
25 		clear_bit(PG_dcache_clean, &page->flags);
26 }
27 
28 #define flush_dcache_mmap_lock(mapping)		do { } while (0)
29 #define flush_dcache_mmap_unlock(mapping)	do { } while (0)
30 #define flush_icache_page(vma, page)		do { } while (0)
31 
32 #define flush_icache_range(start, end)		cache_wbinv_range(start, end)
33 
34 void flush_icache_mm_range(struct mm_struct *mm,
35 			unsigned long start, unsigned long end);
36 void flush_icache_deferred(struct mm_struct *mm);
37 
38 #define flush_cache_vmap(start, end)		do { } while (0)
39 #define flush_cache_vunmap(start, end)		do { } while (0)
40 
41 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
42 do { \
43 	memcpy(dst, src, len); \
44 	if (vma->vm_flags & VM_EXEC) { \
45 		dcache_wb_range((unsigned long)dst, \
46 				(unsigned long)dst + len); \
47 		flush_icache_mm_range(current->mm, \
48 				(unsigned long)dst, \
49 				(unsigned long)dst + len); \
50 		} \
51 } while (0)
52 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
53 	memcpy(dst, src, len)
54 
55 #endif /* __ABI_CSKY_CACHEFLUSH_H */
56