IOC_BASE           19 arch/arm/include/asm/hardware/ioc.h #define ioc_readb(off)		__raw_readb(IOC_BASE + (off))
IOC_BASE           20 arch/arm/include/asm/hardware/ioc.h #define ioc_writeb(val,off)	__raw_writeb(val, IOC_BASE + (off))