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
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
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 */
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
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 */
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 */
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
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.