bus_read_32 42 bsp/drv/arm/include/busio.h #define bus_read_32(addr) (*((volatile uint32_t *)(addr))) bus_read_32 45 bsp/drv/ppc/include/busio.h #define bus_read_32(addr) (*((volatile uint32_t *)(IOBASE+addr))) bus_read_32 63 bsp/drv/x86/arch/busio.S ENTRY(bus_read_32)