xref: /openbmc/linux/arch/csky/abiv2/inc/abi/cacheflush.h (revision 6db6b729)
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 static inline void flush_dcache_folio(struct folio *folio)
22 {
23 	if (test_bit(PG_dcache_clean, &folio->flags))
24 		clear_bit(PG_dcache_clean, &folio->flags);
25 }
26 #define flush_dcache_folio flush_dcache_folio
27 
28 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
29 static inline void flush_dcache_page(struct page *page)
30 {
31 	flush_dcache_folio(page_folio(page));
32 }
33 
34 #define flush_dcache_mmap_lock(mapping)		do { } while (0)
35 #define flush_dcache_mmap_unlock(mapping)	do { } while (0)
36 
37 #define flush_icache_range(start, end)		cache_wbinv_range(start, end)
38 
39 void flush_icache_mm_range(struct mm_struct *mm,
40 			unsigned long start, unsigned long end);
41 void flush_icache_deferred(struct mm_struct *mm);
42 
43 #define flush_cache_vmap(start, end)		do { } while (0)
44 #define flush_cache_vunmap(start, end)		do { } while (0)
45 
46 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
47 do { \
48 	memcpy(dst, src, len); \
49 	if (vma->vm_flags & VM_EXEC) { \
50 		dcache_wb_range((unsigned long)dst, \
51 				(unsigned long)dst + len); \
52 		flush_icache_mm_range(current->mm, \
53 				(unsigned long)dst, \
54 				(unsigned long)dst + len); \
55 		} \
56 } while (0)
57 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
58 	memcpy(dst, src, len)
59 
60 #endif /* __ABI_CSKY_CACHEFLUSH_H */
61