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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
32void mcf_cache_push(void);
33
34static 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
44static 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 */
57static 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
67static 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 */
87static 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 */
96static inline void cache_clear(unsigned long paddr, int len)
97{
98 __clear_cache_all();
99}
100
101#endif /* _M68KNOMMU_CACHEFLUSH_H */