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_cache_mm(mm) do { } while (0)
13 #define flush_cache_dup_mm(mm) do { } while (0)
14 #define flush_cache_range(vma, start, end) do { } while (0)
15 #define flush_cache_page(vma, vmaddr) do { } while (0)
16 #define flush_dcache_range(start, len) __flush_dcache_all()
17 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
18 #define flush_dcache_page(page) do { } while (0)
19 #define flush_dcache_mmap_lock(mapping) do { } while (0)
20 #define flush_dcache_mmap_unlock(mapping) do { } while (0)
21 #define flush_icache_range(start, len) __flush_icache_all()
22 #define flush_icache_page(vma,pg) do { } while (0)
23 #define flush_icache_user_range(vma,pg,adr,len) do { } while (0)
24 #define flush_cache_vmap(start, end) do { } while (0)
25 #define flush_cache_vunmap(start, end) do { } while (0)
26
27 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
28 memcpy(dst, src, len)
29 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
30 memcpy(dst, src, len)
31
32 void mcf_cache_push(void);
33
__clear_cache_all(void)34 static inline void __clear_cache_all(void)
35 {
36 #ifdef CACHE_INVALIDATE
37 __asm__ __volatile__ (
38 "movec %0, %%CACR\n\t"
39 "nop\n\t"
40 : : "r" (CACHE_INVALIDATE) );
41 #endif
42 }
43
__flush_cache_all(void)44 static inline void __flush_cache_all(void)
45 {
46 #ifdef CACHE_PUSH
47 mcf_cache_push();
48 #endif
49 __clear_cache_all();
50 }
51
52 /*
53 * Some ColdFire parts implement separate instruction and data caches,
54 * on those we should just flush the appropriate cache. If we don't need
55 * to do any specific flushing then this will be optimized away.
56 */
__flush_icache_all(void)57 static inline void __flush_icache_all(void)
58 {
59 #ifdef CACHE_INVALIDATEI
60 __asm__ __volatile__ (
61 "movec %0, %%CACR\n\t"
62 "nop\n\t"
63 : : "r" (CACHE_INVALIDATEI) );
64 #endif
65 }
66
__flush_dcache_all(void)67 static inline void __flush_dcache_all(void)
68 {
69 #ifdef CACHE_PUSH
70 mcf_cache_push();
71 #endif
72 #ifdef CACHE_INVALIDATED
73 __asm__ __volatile__ (
74 "movec %0, %%CACR\n\t"
75 "nop\n\t"
76 : : "r" (CACHE_INVALIDATED) );
77 #else
78 /* Flush the write buffer */
79 __asm__ __volatile__ ( "nop" );
80 #endif
81 }
82
83 /*
84 * Push cache entries at supplied address. We want to write back any dirty
85 * data and then invalidate the cache lines associated with this address.
86 */
cache_push(unsigned long paddr,int len)87 static inline void cache_push(unsigned long paddr, int len)
88 {
89 __flush_cache_all();
90 }
91
92 /*
93 * Clear cache entries at supplied address (that is don't write back any
94 * dirty data).
95 */
cache_clear(unsigned long paddr,int len)96 static inline void cache_clear(unsigned long paddr, int len)
97 {
98 __clear_cache_all();
99 }
100
101 #endif /* _M68KNOMMU_CACHEFLUSH_H */
102
