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153 lines
4.9 KiB
153 lines
4.9 KiB
/* |
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* This file is subject to the terms and conditions of the GNU General Public |
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* License. See the file "COPYING" in the main directory of this archive |
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* for more details. |
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* |
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* Copyright (C) 1994, 95, 96, 97, 98, 99, 2000, 01, 02, 03 by Ralf Baechle |
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* Copyright (C) 1999, 2000, 2001 Silicon Graphics, Inc. |
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*/ |
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#ifndef _ASM_CACHEFLUSH_H |
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#define _ASM_CACHEFLUSH_H |
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/* Keep includes the same across arches. */ |
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#include <linux/mm.h> |
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#include <asm/cpu-features.h> |
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/* Cache flushing: |
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* |
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* - flush_cache_all() flushes entire cache |
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* - flush_cache_mm(mm) flushes the specified mm context's cache lines |
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* - flush_cache_dup mm(mm) handles cache flushing when forking |
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* - flush_cache_page(mm, vmaddr, pfn) flushes a single page |
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* - flush_cache_range(vma, start, end) flushes a range of pages |
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* - flush_icache_range(start, end) flush a range of instructions |
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* - flush_dcache_page(pg) flushes(wback&invalidates) a page for dcache |
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* |
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* MIPS specific flush operations: |
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* |
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* - flush_icache_all() flush the entire instruction cache |
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* - flush_data_cache_page() flushes a page from the data cache |
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* - __flush_icache_user_range(start, end) flushes range of user instructions |
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*/ |
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/* |
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* This flag is used to indicate that the page pointed to by a pte |
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* is dirty and requires cleaning before returning it to the user. |
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*/ |
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#define PG_dcache_dirty PG_arch_1 |
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#define Page_dcache_dirty(page) \ |
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test_bit(PG_dcache_dirty, &(page)->flags) |
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#define SetPageDcacheDirty(page) \ |
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set_bit(PG_dcache_dirty, &(page)->flags) |
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#define ClearPageDcacheDirty(page) \ |
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clear_bit(PG_dcache_dirty, &(page)->flags) |
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extern void (*flush_cache_all)(void); |
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extern void (*__flush_cache_all)(void); |
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extern void (*flush_cache_mm)(struct mm_struct *mm); |
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#define flush_cache_dup_mm(mm) do { (void) (mm); } while (0) |
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extern void (*flush_cache_range)(struct vm_area_struct *vma, |
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unsigned long start, unsigned long end); |
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extern void (*flush_cache_page)(struct vm_area_struct *vma, unsigned long page, unsigned long pfn); |
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extern void __flush_dcache_page(struct page *page); |
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#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1 |
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static inline void flush_dcache_page(struct page *page) |
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{ |
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if (cpu_has_dc_aliases) |
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__flush_dcache_page(page); |
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else if (!cpu_has_ic_fills_f_dc) |
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SetPageDcacheDirty(page); |
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} |
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#define flush_dcache_mmap_lock(mapping) do { } while (0) |
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#define flush_dcache_mmap_unlock(mapping) do { } while (0) |
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#define ARCH_HAS_FLUSH_ANON_PAGE |
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extern void __flush_anon_page(struct page *, unsigned long); |
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static inline void flush_anon_page(struct vm_area_struct *vma, |
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struct page *page, unsigned long vmaddr) |
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{ |
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if (cpu_has_dc_aliases && PageAnon(page)) |
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__flush_anon_page(page, vmaddr); |
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} |
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static inline void flush_icache_page(struct vm_area_struct *vma, |
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struct page *page) |
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{ |
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} |
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extern void (*flush_icache_range)(unsigned long start, unsigned long end); |
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extern void (*local_flush_icache_range)(unsigned long start, unsigned long end); |
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extern void (*__flush_icache_user_range)(unsigned long start, |
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unsigned long end); |
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extern void (*__local_flush_icache_user_range)(unsigned long start, |
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unsigned long end); |
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extern void (*__flush_cache_vmap)(void); |
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static inline void flush_cache_vmap(unsigned long start, unsigned long end) |
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{ |
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if (cpu_has_dc_aliases) |
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__flush_cache_vmap(); |
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} |
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extern void (*__flush_cache_vunmap)(void); |
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static inline void flush_cache_vunmap(unsigned long start, unsigned long end) |
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{ |
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if (cpu_has_dc_aliases) |
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__flush_cache_vunmap(); |
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} |
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extern void copy_to_user_page(struct vm_area_struct *vma, |
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struct page *page, unsigned long vaddr, void *dst, const void *src, |
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unsigned long len); |
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extern void copy_from_user_page(struct vm_area_struct *vma, |
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struct page *page, unsigned long vaddr, void *dst, const void *src, |
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unsigned long len); |
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extern void (*flush_icache_all)(void); |
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extern void (*local_flush_data_cache_page)(void * addr); |
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extern void (*flush_data_cache_page)(unsigned long addr); |
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/* Run kernel code uncached, useful for cache probing functions. */ |
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unsigned long run_uncached(void *func); |
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extern void *kmap_coherent(struct page *page, unsigned long addr); |
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extern void kunmap_coherent(void); |
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extern void *kmap_noncoherent(struct page *page, unsigned long addr); |
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static inline void kunmap_noncoherent(void) |
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{ |
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kunmap_coherent(); |
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} |
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#define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE |
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static inline void flush_kernel_dcache_page(struct page *page) |
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{ |
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BUG_ON(cpu_has_dc_aliases && PageHighMem(page)); |
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flush_dcache_page(page); |
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} |
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/* |
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* For now flush_kernel_vmap_range and invalidate_kernel_vmap_range both do a |
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* cache writeback and invalidate operation. |
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*/ |
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extern void (*__flush_kernel_vmap_range)(unsigned long vaddr, int size); |
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static inline void flush_kernel_vmap_range(void *vaddr, int size) |
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{ |
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if (cpu_has_dc_aliases) |
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__flush_kernel_vmap_range((unsigned long) vaddr, size); |
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} |
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static inline void invalidate_kernel_vmap_range(void *vaddr, int size) |
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{ |
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if (cpu_has_dc_aliases) |
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__flush_kernel_vmap_range((unsigned long) vaddr, size); |
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} |
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#endif /* _ASM_CACHEFLUSH_H */
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