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
15void mcf_cache_push(void);
16
17static 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
27static 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 */
40static 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
50static 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 */
70static 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 */
79static 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