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