Linux kernel mirror (for testing)
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linux
1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * (C) 2001 - 2013 Tensilica Inc.
7 */
8
9#ifndef _XTENSA_CACHEFLUSH_H
10#define _XTENSA_CACHEFLUSH_H
11
12#include <linux/mm.h>
13#include <asm/processor.h>
14#include <asm/page.h>
15
16/*
17 * Lo-level routines for cache flushing.
18 *
19 * invalidate data or instruction cache:
20 *
21 * __invalidate_icache_all()
22 * __invalidate_icache_page(adr)
23 * __invalidate_dcache_page(adr)
24 * __invalidate_icache_range(from,size)
25 * __invalidate_dcache_range(from,size)
26 *
27 * flush data cache:
28 *
29 * __flush_dcache_page(adr)
30 *
31 * flush and invalidate data cache:
32 *
33 * __flush_invalidate_dcache_all()
34 * __flush_invalidate_dcache_page(adr)
35 * __flush_invalidate_dcache_range(from,size)
36 *
37 * specials for cache aliasing:
38 *
39 * __flush_invalidate_dcache_page_alias(vaddr,paddr)
40 * __invalidate_dcache_page_alias(vaddr,paddr)
41 * __invalidate_icache_page_alias(vaddr,paddr)
42 */
43
44extern void __invalidate_dcache_all(void);
45extern void __invalidate_icache_all(void);
46extern void __invalidate_dcache_page(unsigned long);
47extern void __invalidate_icache_page(unsigned long);
48extern void __invalidate_icache_range(unsigned long, unsigned long);
49extern void __invalidate_dcache_range(unsigned long, unsigned long);
50
51#if XCHAL_DCACHE_IS_WRITEBACK
52extern void __flush_invalidate_dcache_all(void);
53extern void __flush_dcache_page(unsigned long);
54extern void __flush_dcache_range(unsigned long, unsigned long);
55extern void __flush_invalidate_dcache_page(unsigned long);
56extern void __flush_invalidate_dcache_range(unsigned long, unsigned long);
57#else
58static inline void __flush_dcache_page(unsigned long va)
59{
60}
61static inline void __flush_dcache_range(unsigned long va, unsigned long sz)
62{
63}
64# define __flush_invalidate_dcache_all() __invalidate_dcache_all()
65# define __flush_invalidate_dcache_page(p) __invalidate_dcache_page(p)
66# define __flush_invalidate_dcache_range(p,s) __invalidate_dcache_range(p,s)
67#endif
68
69#if defined(CONFIG_MMU) && (DCACHE_WAY_SIZE > PAGE_SIZE)
70extern void __flush_invalidate_dcache_page_alias(unsigned long, unsigned long);
71extern void __invalidate_dcache_page_alias(unsigned long, unsigned long);
72#else
73static inline void __flush_invalidate_dcache_page_alias(unsigned long virt,
74 unsigned long phys) { }
75static inline void __invalidate_dcache_page_alias(unsigned long virt,
76 unsigned long phys) { }
77#endif
78#if defined(CONFIG_MMU) && (ICACHE_WAY_SIZE > PAGE_SIZE)
79extern void __invalidate_icache_page_alias(unsigned long, unsigned long);
80#else
81static inline void __invalidate_icache_page_alias(unsigned long virt,
82 unsigned long phys) { }
83#endif
84
85/*
86 * We have physically tagged caches - nothing to do here -
87 * unless we have cache aliasing.
88 *
89 * Pages can get remapped. Because this might change the 'color' of that page,
90 * we have to flush the cache before the PTE is changed.
91 * (see also Documentation/core-api/cachetlb.rst)
92 */
93
94#if defined(CONFIG_MMU) && \
95 ((DCACHE_WAY_SIZE > PAGE_SIZE) || defined(CONFIG_SMP))
96
97#ifdef CONFIG_SMP
98void flush_cache_all(void);
99void flush_cache_range(struct vm_area_struct*, ulong, ulong);
100void flush_icache_range(unsigned long start, unsigned long end);
101void flush_cache_page(struct vm_area_struct*,
102 unsigned long, unsigned long);
103#define flush_cache_all flush_cache_all
104#define flush_cache_range flush_cache_range
105#define flush_icache_range flush_icache_range
106#define flush_cache_page flush_cache_page
107#else
108#define flush_cache_all local_flush_cache_all
109#define flush_cache_range local_flush_cache_range
110#define flush_icache_range local_flush_icache_range
111#define flush_cache_page local_flush_cache_page
112#endif
113
114#define local_flush_cache_all() \
115 do { \
116 __flush_invalidate_dcache_all(); \
117 __invalidate_icache_all(); \
118 } while (0)
119
120#define flush_cache_mm(mm) flush_cache_all()
121#define flush_cache_dup_mm(mm) flush_cache_mm(mm)
122
123#define flush_cache_vmap(start,end) flush_cache_all()
124#define flush_cache_vmap_early(start,end) do { } while (0)
125#define flush_cache_vunmap(start,end) flush_cache_all()
126
127void flush_dcache_folio(struct folio *folio);
128#define flush_dcache_folio flush_dcache_folio
129
130#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
131static inline void flush_dcache_page(struct page *page)
132{
133 flush_dcache_folio(page_folio(page));
134}
135
136void local_flush_cache_range(struct vm_area_struct *vma,
137 unsigned long start, unsigned long end);
138void local_flush_cache_page(struct vm_area_struct *vma,
139 unsigned long address, unsigned long pfn);
140
141#else
142
143#define flush_icache_range local_flush_icache_range
144
145#endif
146
147#define flush_icache_user_range flush_icache_range
148
149/* Ensure consistency between data and instruction cache. */
150#define local_flush_icache_range(start, end) \
151 do { \
152 __flush_dcache_range(start, (end) - (start)); \
153 __invalidate_icache_range(start,(end) - (start)); \
154 } while (0)
155
156#if defined(CONFIG_MMU) && (DCACHE_WAY_SIZE > PAGE_SIZE)
157
158extern void copy_to_user_page(struct vm_area_struct*, struct page*,
159 unsigned long, void*, const void*, unsigned long);
160extern void copy_from_user_page(struct vm_area_struct*, struct page*,
161 unsigned long, void*, const void*, unsigned long);
162#define copy_to_user_page copy_to_user_page
163#define copy_from_user_page copy_from_user_page
164
165#else
166
167#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
168 do { \
169 memcpy(dst, src, len); \
170 __flush_dcache_range((unsigned long) dst, len); \
171 __invalidate_icache_range((unsigned long) dst, len); \
172 } while (0)
173
174#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
175 memcpy(dst, src, len)
176
177#endif
178
179#include <asm-generic/cacheflush.h>
180
181#endif /* _XTENSA_CACHEFLUSH_H */