tag	line	file	source code
CFR	260	drivers/block/cmd640.c	outb(CFR, 0x178);
CFR	263	drivers/block/cmd640.c	outb(CFR, 0x78);
CFR	368	drivers/block/cmd640.c	cmd640_chip_version = get_cmd640_reg(CFR) & CFR_DEVREV;