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
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.
9 #ifndef _ASM_CACHEFLUSH_H
10 #define _ASM_CACHEFLUSH_H
12 /* Keep includes the same across arches. */
14 #include <asm/cpu-features.h>
18 * - flush_cache_all() flushes entire cache
19 * - flush_cache_mm(mm) flushes the specified mm context's cache lines
20 * - flush_cache_page(mm, vmaddr, pfn) flushes a single page
21 * - flush_cache_range(vma, start, end) flushes a range of pages
22 * - flush_icache_range(start, end) flush a range of instructions
23 * - flush_dcache_page(pg) flushes(wback&invalidates) a page for dcache
25 * MIPS specific flush operations:
27 * - flush_cache_sigtramp() flush signal trampoline
28 * - flush_icache_all() flush the entire instruction cache
29 * - flush_data_cache_page() flushes a page from the data cache
31 extern void (*flush_cache_all
)(void);
32 extern void (*__flush_cache_all
)(void);
33 extern void (*flush_cache_mm
)(struct mm_struct
*mm
);
34 extern void (*flush_cache_range
)(struct vm_area_struct
*vma
,
35 unsigned long start
, unsigned long end
);
36 extern void (*flush_cache_page
)(struct vm_area_struct
*vma
, unsigned long page
, unsigned long pfn
);
37 extern void __flush_dcache_page(struct page
*page
);
39 static inline void flush_dcache_page(struct page
*page
)
41 if (cpu_has_dc_aliases
|| !cpu_has_ic_fills_f_dc
)
42 __flush_dcache_page(page
);
46 #define flush_dcache_mmap_lock(mapping) do { } while (0)
47 #define flush_dcache_mmap_unlock(mapping) do { } while (0)
49 static inline void flush_icache_page(struct vm_area_struct
*vma
,
54 extern void (*flush_icache_range
)(unsigned long start
, unsigned long end
);
55 #define flush_cache_vmap(start, end) flush_cache_all()
56 #define flush_cache_vunmap(start, end) flush_cache_all()
58 static inline void copy_to_user_page(struct vm_area_struct
*vma
,
59 struct page
*page
, unsigned long vaddr
, void *dst
, const void *src
,
62 if (cpu_has_dc_aliases
)
63 flush_cache_page(vma
, vaddr
, page_to_pfn(page
));
64 memcpy(dst
, src
, len
);
65 __flush_icache_page(vma
, page
);
68 static inline void copy_from_user_page(struct vm_area_struct
*vma
,
69 struct page
*page
, unsigned long vaddr
, void *dst
, const void *src
,
72 if (cpu_has_dc_aliases
)
73 flush_cache_page(vma
, vaddr
, page_to_pfn(page
));
74 memcpy(dst
, src
, len
);
77 extern void (*flush_cache_sigtramp
)(unsigned long addr
);
78 extern void (*flush_icache_all
)(void);
79 extern void (*local_flush_data_cache_page
)(void * addr
);
80 extern void (*flush_data_cache_page
)(unsigned long addr
);
83 * This flag is used to indicate that the page pointed to by a pte
84 * is dirty and requires cleaning before returning it to the user.
86 #define PG_dcache_dirty PG_arch_1
88 #define Page_dcache_dirty(page) \
89 test_bit(PG_dcache_dirty, &(page)->flags)
90 #define SetPageDcacheDirty(page) \
91 set_bit(PG_dcache_dirty, &(page)->flags)
92 #define ClearPageDcacheDirty(page) \
93 clear_bit(PG_dcache_dirty, &(page)->flags)
95 /* Run kernel code uncached, useful for cache probing functions. */
96 unsigned long __init
run_uncached(void *func
);
98 #endif /* _ASM_CACHEFLUSH_H */