1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _M68KNOMMU_CACHEFLUSH_H
3 #define _M68KNOMMU_CACHEFLUSH_H
4 
5 /*
6  * (C) Copyright 2000-2010, Greg Ungerer <gerg@snapgear.com>
7  */
8 #include <linux/mm.h>
9 #include <asm/mcfsim.h>
10 
11 #define flush_cache_all()			__flush_cache_all()
12 #define flush_dcache_range(start, len)		__flush_dcache_all()
13 #define flush_icache_range(start, len)		__flush_icache_all()
14 
15 void mcf_cache_push(void);
16 
__clear_cache_all(void)17 static inline void __clear_cache_all(void)
18 {
19 #ifdef CACHE_INVALIDATE
20 	__asm__ __volatile__ (
21 		"movec	%0, %%CACR\n\t"
22 		"nop\n\t"
23 		: : "r" (CACHE_INVALIDATE) );
24 #endif
25 }
26 
__flush_cache_all(void)27 static inline void __flush_cache_all(void)
28 {
29 #ifdef CACHE_PUSH
30 	mcf_cache_push();
31 #endif
32 	__clear_cache_all();
33 }
34 
35 /*
36  * Some ColdFire parts implement separate instruction and data caches,
37  * on those we should just flush the appropriate cache. If we don't need
38  * to do any specific flushing then this will be optimized away.
39  */
__flush_icache_all(void)40 static inline void __flush_icache_all(void)
41 {
42 #ifdef CACHE_INVALIDATEI
43 	__asm__ __volatile__ (
44 		"movec	%0, %%CACR\n\t"
45 		"nop\n\t"
46 		: : "r" (CACHE_INVALIDATEI) );
47 #endif
48 }
49 
__flush_dcache_all(void)50 static inline void __flush_dcache_all(void)
51 {
52 #ifdef CACHE_PUSH
53 	mcf_cache_push();
54 #endif
55 #ifdef CACHE_INVALIDATED
56 	__asm__ __volatile__ (
57 		"movec	%0, %%CACR\n\t"
58 		"nop\n\t"
59 		: : "r" (CACHE_INVALIDATED) );
60 #else
61 	/* Flush the write buffer */
62 	__asm__ __volatile__ ( "nop" );
63 #endif
64 }
65 
66 /*
67  * Push cache entries at supplied address. We want to write back any dirty
68  * data and then invalidate the cache lines associated with this address.
69  */
cache_push(unsigned long paddr,int len)70 static inline void cache_push(unsigned long paddr, int len)
71 {
72 	__flush_cache_all();
73 }
74 
75 /*
76  * Clear cache entries at supplied address (that is don't write back any
77  * dirty data).
78  */
cache_clear(unsigned long paddr,int len)79 static inline void cache_clear(unsigned long paddr, int len)
80 {
81 	__clear_cache_all();
82 }
83 
84 #include <asm-generic/cacheflush.h>
85 
86 #endif /* _M68KNOMMU_CACHEFLUSH_H */
87