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 * Copyright (C) 1994, 95, 96, 97, 98, 99, 2000, 01, 02, 03 by Ralf Baechle
7 * Copyright (C) 1999, 2000, 2001 Silicon Graphics, Inc.
8 */
9 #ifndef _ASM_CACHEFLUSH_H
10 #define _ASM_CACHEFLUSH_H
11
12 /* Keep includes the same across arches. */
13 #include <linux/mm.h>
14 #include <asm/cpu-features.h>
15
16 /* Cache flushing:
17 *
18 * - flush_cache_all() flushes entire cache
19 * - flush_cache_mm(mm) flushes the specified mm context's cache lines
20 * - flush_cache_dup mm(mm) handles cache flushing when forking
21 * - flush_cache_page(mm, vmaddr, pfn) flushes a single page
22 * - flush_cache_range(vma, start, end) flushes a range of pages
23 * - flush_icache_range(start, end) flush a range of instructions
24 * - flush_dcache_page(pg) flushes(wback&invalidates) a page for dcache
25 *
26 * MIPS specific flush operations:
27 *
28 * - flush_icache_all() flush the entire instruction cache
29 * - flush_data_cache_page() flushes a page from the data cache
30 * - __flush_icache_user_range(start, end) flushes range of user instructions
31 */
32
33 /*
34 * This flag is used to indicate that the page pointed to by a pte
35 * is dirty and requires cleaning before returning it to the user.
36 */
37 #define PG_dcache_dirty PG_arch_1
38
39 #define Page_dcache_dirty(page) \
40 test_bit(PG_dcache_dirty, &(page)->flags)
41 #define SetPageDcacheDirty(page) \
42 set_bit(PG_dcache_dirty, &(page)->flags)
43 #define ClearPageDcacheDirty(page) \
44 clear_bit(PG_dcache_dirty, &(page)->flags)
45
46 extern void (*flush_cache_all)(void);
47 extern void (*__flush_cache_all)(void);
48 extern void (*flush_cache_mm)(struct mm_struct *mm);
49 #define flush_cache_dup_mm(mm) do { (void) (mm); } while (0)
50 extern void (*flush_cache_range)(struct vm_area_struct *vma,
51 unsigned long start, unsigned long end);
52 extern void (*flush_cache_page)(struct vm_area_struct *vma, unsigned long page, unsigned long pfn);
53 extern void __flush_dcache_page(struct page *page);
54
55 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
flush_dcache_page(struct page * page)56 static inline void flush_dcache_page(struct page *page)
57 {
58 if (cpu_has_dc_aliases)
59 __flush_dcache_page(page);
60 else if (!cpu_has_ic_fills_f_dc)
61 SetPageDcacheDirty(page);
62 }
63
64 #define flush_dcache_mmap_lock(mapping) do { } while (0)
65 #define flush_dcache_mmap_unlock(mapping) do { } while (0)
66
67 #define ARCH_HAS_FLUSH_ANON_PAGE
68 extern void __flush_anon_page(struct page *, unsigned long);
flush_anon_page(struct vm_area_struct * vma,struct page * page,unsigned long vmaddr)69 static inline void flush_anon_page(struct vm_area_struct *vma,
70 struct page *page, unsigned long vmaddr)
71 {
72 if (cpu_has_dc_aliases && PageAnon(page))
73 __flush_anon_page(page, vmaddr);
74 }
75
flush_icache_page(struct vm_area_struct * vma,struct page * page)76 static inline void flush_icache_page(struct vm_area_struct *vma,
77 struct page *page)
78 {
79 }
80
81 extern void (*flush_icache_range)(unsigned long start, unsigned long end);
82 extern void (*local_flush_icache_range)(unsigned long start, unsigned long end);
83 extern void (*__flush_icache_user_range)(unsigned long start,
84 unsigned long end);
85 extern void (*__local_flush_icache_user_range)(unsigned long start,
86 unsigned long end);
87
88 extern void (*__flush_cache_vmap)(void);
89
flush_cache_vmap(unsigned long start,unsigned long end)90 static inline void flush_cache_vmap(unsigned long start, unsigned long end)
91 {
92 if (cpu_has_dc_aliases)
93 __flush_cache_vmap();
94 }
95
96 extern void (*__flush_cache_vunmap)(void);
97
flush_cache_vunmap(unsigned long start,unsigned long end)98 static inline void flush_cache_vunmap(unsigned long start, unsigned long end)
99 {
100 if (cpu_has_dc_aliases)
101 __flush_cache_vunmap();
102 }
103
104 extern void copy_to_user_page(struct vm_area_struct *vma,
105 struct page *page, unsigned long vaddr, void *dst, const void *src,
106 unsigned long len);
107
108 extern void copy_from_user_page(struct vm_area_struct *vma,
109 struct page *page, unsigned long vaddr, void *dst, const void *src,
110 unsigned long len);
111
112 extern void (*flush_icache_all)(void);
113 extern void (*local_flush_data_cache_page)(void * addr);
114 extern void (*flush_data_cache_page)(unsigned long addr);
115
116 /* Run kernel code uncached, useful for cache probing functions. */
117 unsigned long run_uncached(void *func);
118
119 extern void *kmap_coherent(struct page *page, unsigned long addr);
120 extern void kunmap_coherent(void);
121 extern void *kmap_noncoherent(struct page *page, unsigned long addr);
122
kunmap_noncoherent(void)123 static inline void kunmap_noncoherent(void)
124 {
125 kunmap_coherent();
126 }
127
128 #define ARCH_IMPLEMENTS_FLUSH_KERNEL_VMAP_RANGE 1
129 /*
130 * For now flush_kernel_vmap_range and invalidate_kernel_vmap_range both do a
131 * cache writeback and invalidate operation.
132 */
133 extern void (*__flush_kernel_vmap_range)(unsigned long vaddr, int size);
134
flush_kernel_vmap_range(void * vaddr,int size)135 static inline void flush_kernel_vmap_range(void *vaddr, int size)
136 {
137 if (cpu_has_dc_aliases)
138 __flush_kernel_vmap_range((unsigned long) vaddr, size);
139 }
140
invalidate_kernel_vmap_range(void * vaddr,int size)141 static inline void invalidate_kernel_vmap_range(void *vaddr, int size)
142 {
143 if (cpu_has_dc_aliases)
144 __flush_kernel_vmap_range((unsigned long) vaddr, size);
145 }
146
147 #endif /* _ASM_CACHEFLUSH_H */
148
