io_unknown.c

这个linux源代码是很全面的~基本完整了~使用c编译的~由于时间问题我没有亲自测试~但就算用来做参考资料也是非常好的

/*
 * linux/arch/sh/kernel/io_unknown.c
 *
 * Copyright (C) 2000 Stuart Menefy ([e-mail])
 *
 * May be copied or modified under the terms of the GNU General Public
 * License.  See linux/COPYING for more information.
 *
 * I/O routine for unknown hardware.
 */

static unsigned int unknown_handler(void)
{
	return 0;
}

#define UNKNOWN_ALIAS(fn) \
	void unknown_##fn(void) __attribute__ ((alias ("unknown_handler")));

UNKNOWN_ALIAS(inb)
UNKNOWN_ALIAS(inw)
UNKNOWN_ALIAS(inl)
UNKNOWN_ALIAS(outb)
UNKNOWN_ALIAS(outw)
UNKNOWN_ALIAS(outl)
UNKNOWN_ALIAS(inb_p)
UNKNOWN_ALIAS(inw_p)
UNKNOWN_ALIAS(inl_p)
UNKNOWN_ALIAS(outb_p)
UNKNOWN_ALIAS(outw_p)
UNKNOWN_ALIAS(outl_p)
UNKNOWN_ALIAS(insb)
UNKNOWN_ALIAS(insw)
UNKNOWN_ALIAS(insl)
UNKNOWN_ALIAS(outsb)
UNKNOWN_ALIAS(outsw)
UNKNOWN_ALIAS(outsl)
UNKNOWN_ALIAS(readb)
UNKNOWN_ALIAS(readw)
UNKNOWN_ALIAS(readl)
UNKNOWN_ALIAS(writeb)
UNKNOWN_ALIAS(writew)
UNKNOWN_ALIAS(writel)
UNKNOWN_ALIAS(isa_port2addr)
UNKNOWN_ALIAS(ioremap)
UNKNOWN_ALIAS(iounmap)