1. 根目录:
2. arch
3. score
4. include
5. asm
6. cacheflush.h

#ifndef _ASM_SCORE_CACHEFLUSH_H
#define _ASM_SCORE_CACHEFLUSH_H

/* Keep includes the same across arches. */
#include <linux/mm.h>

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_cache_sigtramp(unsigned long addr);
extern void flush_icache_all(void);
extern void flush_icache_range(unsigned long start, unsigned long end);
extern void flush_dcache_range(unsigned long start, unsigned long end);
extern void flush_dcache_page(struct page *page);

#define PG_dcache_dirty         PG_arch_1

#define flush_cache_dup_mm(mm)			do {} while (0)
#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
#define flush_dcache_mmap_lock(mapping)		do {} while (0)
#define flush_dcache_mmap_unlock(mapping)	do {} while (0)
#define flush_cache_vmap(start, end)		do {} while (0)
#define flush_cache_vunmap(start, end)		do {} while (0)

static inline void flush_icache_page(struct vm_area_struct *vma,
	struct page *page)
{
	if (vma->vm_flags & VM_EXEC) {
		void *v = page_address(page);
		flush_icache_range((unsigned long) v,
				(unsigned long) v + PAGE_SIZE);
	}
}

#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
	memcpy(dst, src, len)

#define copy_to_user_page(vma, page, vaddr, dst, src, len)	\
	do {							\
		memcpy(dst, src, len);				\
		if ((vma->vm_flags & VM_EXEC))			\
			flush_cache_page(vma, vaddr, page_to_pfn(page));\
	} while (0)

#endif /* _ASM_SCORE_CACHEFLUSH_H */