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
44 extern void __invalidate_dcache_all(void);
45 extern void __invalidate_icache_all(void);
46 extern void __invalidate_dcache_page(unsigned long);
47 extern void __invalidate_icache_page(unsigned long);
48 extern void __invalidate_icache_range(unsigned long, unsigned long);
49 extern void __invalidate_dcache_range(unsigned long, unsigned long);
50
51 #if XCHAL_DCACHE_IS_WRITEBACK
52 extern void __flush_invalidate_dcache_all(void);
53 extern void __flush_dcache_page(unsigned long);
54 extern void __flush_dcache_range(unsigned long, unsigned long);
55 extern void __flush_invalidate_dcache_page(unsigned long);
56 extern void __flush_invalidate_dcache_range(unsigned long, unsigned long);
57 #else
__flush_dcache_page(unsigned long va)58 static inline void __flush_dcache_page(unsigned long va)
59 {
60 }
__flush_dcache_range(unsigned long va,unsigned long sz)61 static 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)
70 extern void __flush_invalidate_dcache_page_alias(unsigned long, unsigned long);
71 extern void __invalidate_dcache_page_alias(unsigned long, unsigned long);
72 #else
__flush_invalidate_dcache_page_alias(unsigned long virt,unsigned long phys)73 static inline void __flush_invalidate_dcache_page_alias(unsigned long virt,
74 unsigned long phys) { }
__invalidate_dcache_page_alias(unsigned long virt,unsigned long phys)75 static 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)
79 extern void __invalidate_icache_page_alias(unsigned long, unsigned long);
80 #else
__invalidate_icache_page_alias(unsigned long virt,unsigned long phys)81 static 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
98 void flush_cache_all(void);
99 void flush_cache_range(struct vm_area_struct*, ulong, ulong);
100 void flush_icache_range(unsigned long start, unsigned long end);
101 void flush_cache_page(struct vm_area_struct*,
102 unsigned long, unsigned long);
103 #else
104 #define flush_cache_all local_flush_cache_all
105 #define flush_cache_range local_flush_cache_range
106 #define flush_icache_range local_flush_icache_range
107 #define flush_cache_page local_flush_cache_page
108 #endif
109
110 #define local_flush_cache_all() \
111 do { \
112 __flush_invalidate_dcache_all(); \
113 __invalidate_icache_all(); \
114 } while (0)
115
116 #define flush_cache_mm(mm) flush_cache_all()
117 #define flush_cache_dup_mm(mm) flush_cache_mm(mm)
118
119 #define flush_cache_vmap(start,end) flush_cache_all()
120 #define flush_cache_vunmap(start,end) flush_cache_all()
121
122 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
123 extern void flush_dcache_page(struct page*);
124
125 void local_flush_cache_range(struct vm_area_struct *vma,
126 unsigned long start, unsigned long end);
127 void local_flush_cache_page(struct vm_area_struct *vma,
128 unsigned long address, unsigned long pfn);
129
130 #else
131
132 #define flush_cache_all() do { } while (0)
133 #define flush_cache_mm(mm) do { } while (0)
134 #define flush_cache_dup_mm(mm) do { } while (0)
135
136 #define flush_cache_vmap(start,end) do { } while (0)
137 #define flush_cache_vunmap(start,end) do { } while (0)
138
139 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
140 #define flush_dcache_page(page) do { } while (0)
141
142 #define flush_icache_range local_flush_icache_range
143 #define flush_cache_page(vma, addr, pfn) do { } while (0)
144 #define flush_cache_range(vma, start, end) do { } while (0)
145
146 #endif
147
148 #define flush_icache_user_range flush_icache_range
149
150 /* Ensure consistency between data and instruction cache. */
151 #define local_flush_icache_range(start, end) \
152 do { \
153 __flush_dcache_range(start, (end) - (start)); \
154 __invalidate_icache_range(start,(end) - (start)); \
155 } while (0)
156
157 /* This is not required, see Documentation/core-api/cachetlb.rst */
158 #define flush_icache_page(vma,page) do { } while (0)
159
160 #define flush_dcache_mmap_lock(mapping) do { } while (0)
161 #define flush_dcache_mmap_unlock(mapping) do { } while (0)
162
163 #if defined(CONFIG_MMU) && (DCACHE_WAY_SIZE > PAGE_SIZE)
164
165 extern void copy_to_user_page(struct vm_area_struct*, struct page*,
166 unsigned long, void*, const void*, unsigned long);
167 extern void copy_from_user_page(struct vm_area_struct*, struct page*,
168 unsigned long, void*, const void*, unsigned long);
169
170 #else
171
172 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
173 do { \
174 memcpy(dst, src, len); \
175 __flush_dcache_range((unsigned long) dst, len); \
176 __invalidate_icache_range((unsigned long) dst, len); \
177 } while (0)
178
179 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
180 memcpy(dst, src, len)
181
182 #endif
183
184 #endif /* _XTENSA_CACHEFLUSH_H */
185