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_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
26 * MIPS specific flush operations:
28 * - flush_cache_sigtramp() flush signal trampoline
29 * - flush_icache_all() flush the entire instruction cache
30 * - flush_data_cache_page() flushes a page from the data cache
32 extern void (*flush_cache_all)(void);
33 extern void (*__flush_cache_all)(void);
34 extern void (*flush_cache_mm)(struct mm_struct *mm);
35 #define flush_cache_dup_mm(mm) do { (void) (mm); } while (0)
36 extern void (*flush_cache_range)(struct vm_area_struct *vma,
37 unsigned long start, unsigned long end);
38 extern void (*flush_cache_page)(struct vm_area_struct *vma, unsigned long page, unsigned long pfn);
39 extern void __flush_dcache_page(struct page *page);
41 static inline void flush_dcache_page(struct page *page)
43 if (cpu_has_dc_aliases || !cpu_has_ic_fills_f_dc)
44 __flush_dcache_page(page);
48 #define flush_dcache_mmap_lock(mapping) do { } while (0)
49 #define flush_dcache_mmap_unlock(mapping) do { } while (0)
51 #define ARCH_HAS_FLUSH_ANON_PAGE
52 extern void __flush_anon_page(struct page *, unsigned long);
53 static inline void flush_anon_page(struct vm_area_struct *vma,
54 struct page *page, unsigned long vmaddr)
56 if (cpu_has_dc_aliases && PageAnon(page))
57 __flush_anon_page(page, vmaddr);
60 static inline void flush_icache_page(struct vm_area_struct *vma,
65 extern void (*flush_icache_range)(unsigned long start, unsigned long end);
66 #define flush_cache_vmap(start, end) flush_cache_all()
67 #define flush_cache_vunmap(start, end) flush_cache_all()
69 extern void copy_to_user_page(struct vm_area_struct *vma,
70 struct page *page, unsigned long vaddr, void *dst, const void *src,
73 extern void copy_from_user_page(struct vm_area_struct *vma,
74 struct page *page, unsigned long vaddr, void *dst, const void *src,
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 run_uncached(void *func);
98 extern void *kmap_coherent(struct page *page, unsigned long addr);
99 extern void kunmap_coherent(void);
101 #endif /* _ASM_CACHEFLUSH_H */