/* * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 1994, 95, 96, 97, 98, 99, 2000, 01, 02, 03 by Ralf Baechle * Copyright (C) 1999, 2000, 2001 Silicon Graphics, Inc. */ #ifndef _ASM_CACHEFLUSH_H #define _ASM_CACHEFLUSH_H /* Keep includes the same across arches. */ #include <linux/mm.h> #include <asm/cpu-features.h> /* Cache flushing: * * - flush_cache_all() flushes entire cache * - flush_cache_mm(mm) flushes the specified mm context's cache lines * - flush_cache_page(mm, vmaddr, pfn) flushes a single page * - flush_cache_range(vma, start, end) flushes a range of pages * - flush_icache_range(start, end) flush a range of instructions * - flush_dcache_page(pg) flushes(wback&invalidates) a page for dcache * - flush_icache_page(vma, pg) flushes(invalidates) a page for icache * * MIPS specific flush operations: * * - flush_cache_sigtramp() flush signal trampoline * - flush_icache_all() flush the entire instruction cache * - flush_data_cache_page() flushes a page from the data cache */ extern void (*flush_cache_all)(void); extern void (*__flush_cache_all)(void); extern void (*flush_cache_mm)(struct mm_struct *mm); extern void (*flush_cache_range)(struct vm_area_struct *vma, unsigned long start, unsigned long end); extern void (*flush_cache_page)(struct vm_area_struct *vma, unsigned long page, unsigned long pfn); extern void __flush_dcache_page(struct page *page); static inline void flush_dcache_page(struct page *page) { if (cpu_has_dc_aliases) __flush_dcache_page(page); } #define flush_dcache_mmap_lock(mapping) do { } while (0) #define flush_dcache_mmap_unlock(mapping) do { } while (0) extern void (*flush_icache_page)(struct vm_area_struct *vma, struct page *page); extern void (*flush_icache_range)(unsigned long __user start, unsigned long __user end); #define flush_cache_vmap(start, end) flush_cache_all() #define flush_cache_vunmap(start, end) flush_cache_all() static inline void copy_to_user_page(struct vm_area_struct *vma, struct page *page, unsigned long vaddr, void *dst, const void *src, unsigned long len) { if (cpu_has_dc_aliases) flush_cache_page(vma, vaddr, page_to_pfn(page)); memcpy(dst, src, len); flush_icache_page(vma, page); } static inline void copy_from_user_page(struct vm_area_struct *vma, struct page *page, unsigned long vaddr, void *dst, const void *src, unsigned long len) { if (cpu_has_dc_aliases) flush_cache_page(vma, vaddr, page_to_pfn(page)); memcpy(dst, src, len); } extern void (*flush_cache_sigtramp)(unsigned long addr); extern void (*flush_icache_all)(void); extern void (*flush_data_cache_page)(unsigned long addr); /* * This flag is used to indicate that the page pointed to by a pte * is dirty and requires cleaning before returning it to the user. */ #define PG_dcache_dirty PG_arch_1 #define Page_dcache_dirty(page) \ test_bit(PG_dcache_dirty, &(page)->flags) #define SetPageDcacheDirty(page) \ set_bit(PG_dcache_dirty, &(page)->flags) #define ClearPageDcacheDirty(page) \ clear_bit(PG_dcache_dirty, &(page)->flags) /* Run kernel code uncached, useful for cache probing functions. */ unsigned long __init run_uncached(void *func); #endif /* _ASM_CACHEFLUSH_H */