1 #ifndef _M68KNOMMU_CACHEFLUSH_H
2 #define _M68KNOMMU_CACHEFLUSH_H
3 
4 /*
5  * (C) Copyright 2000-2010, Greg Ungerer <gerg@snapgear.com>
6  */
7 #include <linux/mm.h>
8 #include <asm/mcfsim.h>
9 
10 #define flush_cache_all()			__flush_cache_all()
11 #define flush_cache_mm(mm)			do { } while (0)
12 #define flush_cache_dup_mm(mm)			do { } while (0)
13 #define flush_cache_range(vma, start, end)	do { } while (0)
14 #define flush_cache_page(vma, vmaddr)		do { } while (0)
15 #define flush_dcache_range(start, len)		__flush_dcache_all()
16 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
17 #define flush_dcache_page(page)			do { } while (0)
18 #define flush_dcache_mmap_lock(mapping)		do { } while (0)
19 #define flush_dcache_mmap_unlock(mapping)	do { } while (0)
20 #define flush_icache_range(start, len)		__flush_icache_all()
21 #define flush_icache_page(vma,pg)		do { } while (0)
22 #define flush_icache_user_range(vma,pg,adr,len)	do { } while (0)
23 #define flush_cache_vmap(start, end)		do { } while (0)
24 #define flush_cache_vunmap(start, end)		do { } while (0)
25 
26 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
27 	memcpy(dst, src, len)
28 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
29 	memcpy(dst, src, len)
30 
31 void mcf_cache_push(void);
32 
33 static inline void __clear_cache_all(void)
34 {
35 #ifdef CACHE_INVALIDATE
36 	__asm__ __volatile__ (
37 		"movec	%0, %%CACR\n\t"
38 		"nop\n\t"
39 		: : "r" (CACHE_INVALIDATE) );
40 #endif
41 }
42 
43 static inline void __flush_cache_all(void)
44 {
45 #ifdef CACHE_PUSH
46 	mcf_cache_push();
47 #endif
48 	__clear_cache_all();
49 }
50 
51 /*
52  * Some ColdFire parts implement separate instruction and data caches,
53  * on those we should just flush the appropriate cache. If we don't need
54  * to do any specific flushing then this will be optimized away.
55  */
56 static inline void __flush_icache_all(void)
57 {
58 #ifdef CACHE_INVALIDATEI
59 	__asm__ __volatile__ (
60 		"movec	%0, %%CACR\n\t"
61 		"nop\n\t"
62 		: : "r" (CACHE_INVALIDATEI) );
63 #endif
64 }
65 
66 static inline void __flush_dcache_all(void)
67 {
68 #ifdef CACHE_PUSH
69 	mcf_cache_push();
70 #endif
71 #ifdef CACHE_INVALIDATED
72 	__asm__ __volatile__ (
73 		"movec	%0, %%CACR\n\t"
74 		"nop\n\t"
75 		: : "r" (CACHE_INVALIDATED) );
76 #else
77 	/* Flush the write buffer */
78 	__asm__ __volatile__ ( "nop" );
79 #endif
80 }
81 
82 /*
83  * Push cache entries at supplied address. We want to write back any dirty
84  * data and then invalidate the cache lines associated with this address.
85  */
86 static inline void cache_push(unsigned long paddr, int len)
87 {
88 	__flush_cache_all();
89 }
90 
91 /*
92  * Clear cache entries at supplied address (that is don't write back any
93  * dirty data).
94  */
95 static inline void cache_clear(unsigned long paddr, int len)
96 {
97 	__clear_cache_all();
98 }
99 
100 #endif /* _M68KNOMMU_CACHEFLUSH_H */
101