1. 根目录:
2. arch
3. m32r
4. include
5. asm
6. cacheflush.h

#ifndef _ASM_M32R_CACHEFLUSH_H
#define _ASM_M32R_CACHEFLUSH_H

#include <linux/mm.h>

extern void _flush_cache_all(void);
extern void _flush_cache_copyback_all(void);

#if defined(CONFIG_CHIP_M32700) || defined(CONFIG_CHIP_OPSP) || defined(CONFIG_CHIP_M32104)
#define flush_cache_all()			do { } while (0)
#define flush_cache_mm(mm)			do { } while (0)
#define flush_cache_dup_mm(mm)			do { } while (0)
#define flush_cache_range(vma, start, end)	do { } while (0)
#define flush_cache_page(vma, vmaddr, pfn)	do { } while (0)
#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
#define flush_dcache_page(page)			do { } while (0)
#define flush_dcache_mmap_lock(mapping)		do { } while (0)
#define flush_dcache_mmap_unlock(mapping)	do { } while (0)
#ifndef CONFIG_SMP
#define flush_icache_range(start, end)		_flush_cache_copyback_all()
#define flush_icache_page(vma,pg)		_flush_cache_copyback_all()
#define flush_icache_user_range(vma,pg,adr,len)	_flush_cache_copyback_all()
#define flush_cache_sigtramp(addr)		_flush_cache_copyback_all()
#else	/* CONFIG_SMP */
extern void smp_flush_cache_all(void);
#define flush_icache_range(start, end)		smp_flush_cache_all()
#define flush_icache_page(vma,pg)		smp_flush_cache_all()
#define flush_icache_user_range(vma,pg,adr,len)	smp_flush_cache_all()
#define flush_cache_sigtramp(addr)		_flush_cache_copyback_all()
#endif	/* CONFIG_SMP */
#elif defined(CONFIG_CHIP_M32102)
#define flush_cache_all()			do { } while (0)
#define flush_cache_mm(mm)			do { } while (0)
#define flush_cache_dup_mm(mm)			do { } while (0)
#define flush_cache_range(vma, start, end)	do { } while (0)
#define flush_cache_page(vma, vmaddr, pfn)	do { } while (0)
#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
#define flush_dcache_page(page)			do { } while (0)
#define flush_dcache_mmap_lock(mapping)		do { } while (0)
#define flush_dcache_mmap_unlock(mapping)	do { } while (0)
#define flush_icache_range(start, end)		_flush_cache_all()
#define flush_icache_page(vma,pg)		_flush_cache_all()
#define flush_icache_user_range(vma,pg,adr,len)	_flush_cache_all()
#define flush_cache_sigtramp(addr)		_flush_cache_all()
#else
#define flush_cache_all()			do { } while (0)
#define flush_cache_mm(mm)			do { } while (0)
#define flush_cache_dup_mm(mm)			do { } while (0)
#define flush_cache_range(vma, start, end)	do { } while (0)
#define flush_cache_page(vma, vmaddr, pfn)	do { } while (0)
#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
#define flush_dcache_page(page)			do { } while (0)
#define flush_dcache_mmap_lock(mapping)		do { } while (0)
#define flush_dcache_mmap_unlock(mapping)	do { } while (0)
#define flush_icache_range(start, end)		do { } while (0)
#define flush_icache_page(vma,pg)		do { } while (0)
#define flush_icache_user_range(vma,pg,adr,len)	do { } while (0)
#define flush_cache_sigtramp(addr)		do { } while (0)
#endif	/* CONFIG_CHIP_* */

#define flush_cache_vmap(start, end)	do { } while (0)
#define flush_cache_vunmap(start, end)	do { } while (0)

#define copy_to_user_page(vma, page, vaddr, dst, src, len)	\
do {								\
	memcpy(dst, src, len);					\
	flush_icache_user_range(vma, page, vaddr, len);		\
} while (0)
#define copy_from_user_page(vma, page, vaddr, dst, src, len)	\
	memcpy(dst, src, len)

#endif /* _ASM_M32R_CACHEFLUSH_H */