| 1 | /* |
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| 2 | * This file is subject to the terms and conditions of the GNU General Public |
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| 3 | * License. See the file "COPYING" in the main directory of this archive |
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| 4 | * for more details. |
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| 5 | * |
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| 6 | * Copyright (C) 1994, 95, 96, 97, 98, 99, 2000, 01, 02, 03 by Ralf Baechle |
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| 7 | * Copyright (C) 1999, 2000, 2001 Silicon Graphics, Inc. |
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| 8 | */ |
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| 9 | #ifndef _ASM_CACHEFLUSH_H |
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| 10 | #define _ASM_CACHEFLUSH_H |
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| 11 | |
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| 12 | |
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| 13 | /* Keep includes the same across arches. */ |
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| 14 | |
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| 15 | /* Cache flushing: |
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| 16 | * |
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| 17 | * - flush_cache_all() flushes entire cache |
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| 18 | * - flush_cache_mm(mm) flushes the specified mm context's cache lines |
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| 19 | * - flush_cache_page(mm, vmaddr, pfn) flushes a single page |
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| 20 | * - flush_cache_range(vma, start, end) flushes a range of pages |
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| 21 | * - flush_icache_range(start, end) flush a range of instructions |
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| 22 | * - flush_dcache_page(pg) flushes(wback&invalidates) a page for dcache |
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| 23 | * - flush_icache_page(vma, pg) flushes(invalidates) a page for icache |
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| 24 | * |
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| 25 | * MIPS specific flush operations: |
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| 26 | * |
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| 27 | * - flush_cache_sigtramp() flush signal trampoline |
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| 28 | * - flush_icache_all() flush the entire instruction cache |
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| 29 | * - flush_data_cache_page() flushes a page from the data cache |
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| 30 | */ |
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| 31 | extern void (*flush_cache_all)(void); |
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| 32 | extern void (*__flush_cache_all)(void); |
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| 33 | extern void (*flush_cache_mm)(struct mm_struct *mm); |
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| 34 | extern void (*flush_cache_range)(struct vm_area_struct *vma, |
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| 35 | unsigned long start, unsigned long end); |
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| 36 | extern void (*flush_cache_page)(struct vm_area_struct *vma, unsigned long page, unsigned long pfn); |
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| 37 | extern void __flush_dcache_page(struct page *page); |
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| 38 | |
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| 39 | static inline void flush_dcache_page(struct page *page) |
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| 40 | { |
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| 41 | if (cpu_has_dc_aliases) |
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| 42 | __flush_dcache_page(page); |
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| 43 | |
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| 44 | } |
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| 45 | |
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| 46 | #define flush_dcache_mmap_lock(mapping) do { } while (0) |
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| 47 | #define flush_dcache_mmap_unlock(mapping) do { } while (0) |
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| 48 | |
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| 49 | extern void (*flush_icache_page)(struct vm_area_struct *vma, |
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| 50 | struct page *page); |
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| 51 | extern void (*flush_icache_range)(unsigned long start, unsigned long end); |
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| 52 | #define flush_cache_vmap(start, end) flush_cache_all() |
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| 53 | #define flush_cache_vunmap(start, end) flush_cache_all() |
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| 54 | |
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| 55 | #define copy_to_user_page(vma, page, vaddr, dst, src, len) \ |
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| 56 | do { \ |
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| 57 | memcpy(dst, (void *) src, len); \ |
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| 58 | flush_icache_page(vma, page); \ |
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| 59 | } while (0) |
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| 60 | #define copy_from_user_page(vma, page, vaddr, dst, src, len) \ |
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| 61 | memcpy(dst, src, len) |
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| 62 | |
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| 63 | extern void (*flush_cache_sigtramp)(unsigned long addr); |
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| 64 | extern void (*flush_icache_all)(void); |
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| 65 | extern void (*flush_data_cache_page)(unsigned long addr); |
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| 66 | |
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| 67 | /* |
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| 68 | * This flag is used to indicate that the page pointed to by a pte |
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| 69 | * is dirty and requires cleaning before returning it to the user. |
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| 70 | */ |
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| 71 | #define PG_dcache_dirty PG_arch_1 |
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| 72 | |
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| 73 | #define Page_dcache_dirty(page) \ |
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| 74 | test_bit(PG_dcache_dirty, &(page)->flags) |
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| 75 | #define SetPageDcacheDirty(page) \ |
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| 76 | set_bit(PG_dcache_dirty, &(page)->flags) |
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| 77 | #define ClearPageDcacheDirty(page) \ |
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| 78 | clear_bit(PG_dcache_dirty, &(page)->flags) |
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| 79 | |
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| 80 | #endif /* _ASM_CACHEFLUSH_H */ |
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