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/* * 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_dup mm(mm) handles cache flushing when forking * - 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 * * MIPS specific flush operations: * * - flush_icache_all() flush the entire instruction cache * - flush_data_cache_page() flushes a page from the data cache * - __flush_icache_user_range(start, end) flushes range of user instructions */ /* * 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) extern void (*flush_cache_all)(void); extern void (*__flush_cache_all)(void); extern void (*flush_cache_mm)(struct mm_struct *mm); #define flush_cache_dup_mm(mm) do { (void) (mm); } while (0) 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); #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1 static inline void flush_dcache_page(struct page *page) { if (cpu_has_dc_aliases) __flush_dcache_page(page); else if (!cpu_has_ic_fills_f_dc) SetPageDcacheDirty(page); } #define flush_dcache_mmap_lock(mapping) do { } while (0) #define flush_dcache_mmap_unlock(mapping) do { } while (0) #define ARCH_HAS_FLUSH_ANON_PAGE extern void __flush_anon_page(struct page *, unsigned long); static inline void flush_anon_page(struct vm_area_struct *vma, struct page *page, unsigned long vmaddr) { if (cpu_has_dc_aliases && PageAnon(page)) __flush_anon_page(page, vmaddr); } static inline void flush_icache_page(struct vm_area_struct *vma, struct page *page) { } extern void (*flush_icache_range)(unsigned long start, unsigned long end); extern void (*local_flush_icache_range)(unsigned long start, unsigned long end); extern void (*__flush_icache_user_range)(unsigned long start, unsigned long end); extern void (*__local_flush_icache_user_range)(unsigned long start, unsigned long end); extern void (*__flush_cache_vmap)(void); static inline void flush_cache_vmap(unsigned long start, unsigned long end) { if (cpu_has_dc_aliases) __flush_cache_vmap(); } extern void (*__flush_cache_vunmap)(void); static inline void flush_cache_vunmap(unsigned long start, unsigned long end) { if (cpu_has_dc_aliases) __flush_cache_vunmap(); } extern void copy_to_user_page(struct vm_area_struct *vma, struct page *page, unsigned long vaddr, void *dst, const void *src, unsigned long len); extern void copy_from_user_page(struct vm_area_struct *vma, struct page *page, unsigned long vaddr, void *dst, const void *src, unsigned long len); extern void (*flush_icache_all)(void); extern void (*local_flush_data_cache_page)(void * addr); extern void (*flush_data_cache_page)(unsigned long addr); /* Run kernel code uncached, useful for cache probing functions. */ unsigned long run_uncached(void *func); extern void *kmap_coherent(struct page *page, unsigned long addr); extern void kunmap_coherent(void); extern void *kmap_noncoherent(struct page *page, unsigned long addr); static inline void kunmap_noncoherent(void) { kunmap_coherent(); } #define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE static inline void flush_kernel_dcache_page(struct page *page) { BUG_ON(cpu_has_dc_aliases && PageHighMem(page)); flush_dcache_page(page); } /* * For now flush_kernel_vmap_range and invalidate_kernel_vmap_range both do a * cache writeback and invalidate operation. */ extern void (*__flush_kernel_vmap_range)(unsigned long vaddr, int size); static inline void flush_kernel_vmap_range(void *vaddr, int size) { if (cpu_has_dc_aliases) __flush_kernel_vmap_range((unsigned long) vaddr, size); } static inline void invalidate_kernel_vmap_range(void *vaddr, int size) { if (cpu_has_dc_aliases) __flush_kernel_vmap_range((unsigned long) vaddr, size); } #endif /* _ASM_CACHEFLUSH_H */
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