| 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 |
| 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 */ |