Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |
Ralf Baechle | ec8c044 | 2006-12-12 17:14:57 +0000 | [diff] [blame] | 20 | * - flush_cache_dup mm(mm) handles cache flushing when forking |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
Ralf Baechle | ec8c044 | 2006-12-12 17:14:57 +0000 | [diff] [blame] | 35 | #define flush_cache_dup_mm(mm) do { (void) (mm); } while (0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
| 40 | |
| 41 | static inline void flush_dcache_page(struct page *page) |
| 42 | { |
Ralf Baechle | 585fa72 | 2006-08-12 16:40:08 +0100 | [diff] [blame] | 43 | if (cpu_has_dc_aliases || !cpu_has_ic_fills_f_dc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | __flush_dcache_page(page); |
| 45 | |
| 46 | } |
| 47 | |
| 48 | #define flush_dcache_mmap_lock(mapping) do { } while (0) |
| 49 | #define flush_dcache_mmap_unlock(mapping) do { } while (0) |
| 50 | |
Ralf Baechle | 7575a49 | 2007-03-23 21:36:37 +0000 | [diff] [blame] | 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) |
| 55 | { |
| 56 | if (cpu_has_dc_aliases && PageAnon(page)) |
| 57 | __flush_anon_page(page, vmaddr); |
| 58 | } |
| 59 | |
Ralf Baechle | 585fa72 | 2006-08-12 16:40:08 +0100 | [diff] [blame] | 60 | static inline void flush_icache_page(struct vm_area_struct *vma, |
| 61 | struct page *page) |
| 62 | { |
| 63 | } |
| 64 | |
Atsushi Nemoto | d4264f1 | 2006-01-29 02:27:51 +0900 | [diff] [blame] | 65 | extern void (*flush_icache_range)(unsigned long start, unsigned long end); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | #define flush_cache_vmap(start, end) flush_cache_all() |
| 67 | #define flush_cache_vunmap(start, end) flush_cache_all() |
| 68 | |
Ralf Baechle | f8829ca | 2006-10-21 23:17:35 +0100 | [diff] [blame] | 69 | extern void copy_to_user_page(struct vm_area_struct *vma, |
Ralf Baechle | 53de0d4 | 2005-03-18 17:36:42 +0000 | [diff] [blame] | 70 | struct page *page, unsigned long vaddr, void *dst, const void *src, |
Ralf Baechle | f8829ca | 2006-10-21 23:17:35 +0100 | [diff] [blame] | 71 | unsigned long len); |
Ralf Baechle | 53de0d4 | 2005-03-18 17:36:42 +0000 | [diff] [blame] | 72 | |
Ralf Baechle | f8829ca | 2006-10-21 23:17:35 +0100 | [diff] [blame] | 73 | extern void copy_from_user_page(struct vm_area_struct *vma, |
Ralf Baechle | 53de0d4 | 2005-03-18 17:36:42 +0000 | [diff] [blame] | 74 | struct page *page, unsigned long vaddr, void *dst, const void *src, |
Ralf Baechle | f8829ca | 2006-10-21 23:17:35 +0100 | [diff] [blame] | 75 | unsigned long len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | |
| 77 | extern void (*flush_cache_sigtramp)(unsigned long addr); |
| 78 | extern void (*flush_icache_all)(void); |
Ralf Baechle | 7e3bfc7 | 2006-04-05 20:42:04 +0100 | [diff] [blame] | 79 | extern void (*local_flush_data_cache_page)(void * addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | extern void (*flush_data_cache_page)(unsigned long addr); |
| 81 | |
| 82 | /* |
| 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. |
| 85 | */ |
| 86 | #define PG_dcache_dirty PG_arch_1 |
| 87 | |
| 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) |
| 94 | |
Thiemo Seufer | ba5187d | 2005-04-25 16:36:23 +0000 | [diff] [blame] | 95 | /* Run kernel code uncached, useful for cache probing functions. */ |
| 96 | unsigned long __init run_uncached(void *func); |
| 97 | |
Ralf Baechle | 7575a49 | 2007-03-23 21:36:37 +0000 | [diff] [blame] | 98 | extern void *kmap_coherent(struct page *page, unsigned long addr); |
Ralf Baechle | eacb9d6 | 2007-04-26 15:46:25 +0100 | [diff] [blame] | 99 | extern void kunmap_coherent(void); |
Ralf Baechle | 7575a49 | 2007-03-23 21:36:37 +0000 | [diff] [blame] | 100 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | #endif /* _ASM_CACHEFLUSH_H */ |