mirror of https://gitee.com/openkylin/linux.git
114 lines
2.3 KiB
C
114 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_GENERIC_CACHEFLUSH_H
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#define _ASM_GENERIC_CACHEFLUSH_H
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/*
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* The cache doesn't need to be flushed when TLB entries change when
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* the cache is mapped to physical memory, not virtual memory
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*/
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#ifndef flush_cache_all
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static inline void flush_cache_all(void)
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{
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}
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#endif
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#ifndef flush_cache_mm
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static inline void flush_cache_mm(struct mm_struct *mm)
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{
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}
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#endif
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#ifndef flush_cache_dup_mm
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static inline void flush_cache_dup_mm(struct mm_struct *mm)
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{
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}
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#endif
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#ifndef flush_cache_range
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static inline void flush_cache_range(struct vm_area_struct *vma,
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unsigned long start,
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unsigned long end)
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{
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}
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#endif
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#ifndef flush_cache_page
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static inline void flush_cache_page(struct vm_area_struct *vma,
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unsigned long vmaddr,
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unsigned long pfn)
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{
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}
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#endif
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#ifndef ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE
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static inline void flush_dcache_page(struct page *page)
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{
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}
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#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
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#endif
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#ifndef flush_dcache_mmap_lock
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static inline void flush_dcache_mmap_lock(struct address_space *mapping)
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{
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}
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#endif
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#ifndef flush_dcache_mmap_unlock
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static inline void flush_dcache_mmap_unlock(struct address_space *mapping)
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{
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}
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#endif
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#ifndef flush_icache_range
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static inline void flush_icache_range(unsigned long start, unsigned long end)
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{
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}
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#endif
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#ifndef flush_icache_user_range
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#define flush_icache_user_range flush_icache_range
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#endif
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#ifndef flush_icache_page
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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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#endif
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#ifndef flush_icache_user_page
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static inline void flush_icache_user_page(struct vm_area_struct *vma,
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struct page *page,
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unsigned long addr, int len)
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{
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}
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#endif
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#ifndef flush_cache_vmap
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static inline void flush_cache_vmap(unsigned long start, unsigned long end)
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{
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}
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#endif
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#ifndef flush_cache_vunmap
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static inline void flush_cache_vunmap(unsigned long start, unsigned long end)
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{
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}
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#endif
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#ifndef copy_to_user_page
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#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
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do { \
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memcpy(dst, src, len); \
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flush_icache_user_page(vma, page, vaddr, len); \
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} while (0)
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#endif
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#ifndef copy_from_user_page
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#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
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memcpy(dst, src, len)
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#endif
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#endif /* _ASM_GENERIC_CACHEFLUSH_H */
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