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1da177e4 LT |
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_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 | |
24 | * - flush_icache_page(vma, pg) flushes(invalidates) a page for icache | |
25 | * | |
26 | * MIPS specific flush operations: | |
27 | * | |
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 | |
31 | */ | |
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 | extern void (*flush_cache_range)(struct vm_area_struct *vma, | |
36 | unsigned long start, unsigned long end); | |
37 | extern void (*flush_cache_page)(struct vm_area_struct *vma, unsigned long page, unsigned long pfn); | |
38 | extern void __flush_dcache_page(struct page *page); | |
39 | ||
40 | static inline void flush_dcache_page(struct page *page) | |
41 | { | |
42 | if (cpu_has_dc_aliases) | |
43 | __flush_dcache_page(page); | |
44 | ||
45 | } | |
46 | ||
47 | #define flush_dcache_mmap_lock(mapping) do { } while (0) | |
48 | #define flush_dcache_mmap_unlock(mapping) do { } while (0) | |
49 | ||
50 | extern void (*flush_icache_page)(struct vm_area_struct *vma, | |
51 | struct page *page); | |
52 | extern void (*flush_icache_range)(unsigned long start, unsigned long end); | |
53 | #define flush_cache_vmap(start, end) flush_cache_all() | |
54 | #define flush_cache_vunmap(start, end) flush_cache_all() | |
55 | ||
56 | #define copy_to_user_page(vma, page, vaddr, dst, src, len) \ | |
57 | do { \ | |
58 | memcpy(dst, (void *) src, len); \ | |
59 | flush_icache_page(vma, page); \ | |
60 | } while (0) | |
61 | #define copy_from_user_page(vma, page, vaddr, dst, src, len) \ | |
62 | memcpy(dst, src, len) | |
63 | ||
64 | extern void (*flush_cache_sigtramp)(unsigned long addr); | |
65 | extern void (*flush_icache_all)(void); | |
66 | extern void (*flush_data_cache_page)(unsigned long addr); | |
67 | ||
68 | /* | |
69 | * This flag is used to indicate that the page pointed to by a pte | |
70 | * is dirty and requires cleaning before returning it to the user. | |
71 | */ | |
72 | #define PG_dcache_dirty PG_arch_1 | |
73 | ||
74 | #define Page_dcache_dirty(page) \ | |
75 | test_bit(PG_dcache_dirty, &(page)->flags) | |
76 | #define SetPageDcacheDirty(page) \ | |
77 | set_bit(PG_dcache_dirty, &(page)->flags) | |
78 | #define ClearPageDcacheDirty(page) \ | |
79 | clear_bit(PG_dcache_dirty, &(page)->flags) | |
80 | ||
81 | #endif /* _ASM_CACHEFLUSH_H */ |