acrn-kernel/arch/x86_64/lib/io.c

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#include <linux/string.h>
#include <asm/io.h>
#include <linux/module.h>
void __memcpy_toio(unsigned long dst,const void*src,unsigned len)
{
__inline_memcpy((void *) dst,src,len);
}
EXPORT_SYMBOL(__memcpy_toio);
void __memcpy_fromio(void *dst,unsigned long src,unsigned len)
{
__inline_memcpy(dst,(const void *) src,len);
}
EXPORT_SYMBOL(__memcpy_fromio);
void memset_io(volatile void __iomem *a, int b, size_t c)
{
/* XXX: memset can mangle the IO patterns quite a bit.
perhaps it would be better to use a dumb one */
memset((void *)a,b,c);
}
EXPORT_SYMBOL(memset_io);