divice init

bootkernel

SCSI network card等的驱动当然也是在 start_kernel()函数里完成的
               
               
                start_kernel() -> do_basic_setup -> driver_init -> device_init ()  ==2.6
主要是研究这个函数
727 * Ok, the machine is now initialized. None of the devices
728 * have been touched yet, but the CPU subsystem is up and
729 * running, and memory and process management works.
730 *
731 * Now we can finally start doing some real work..
732 */
733static void __init do_basic_setup(void)
734{
735        /* drivers will send hotplug events */
736        init_workqueues();
737        usermodehelper_init();
738        driver_init();
739        init_irq_proc();
740        do_initcalls();
741}
===>走到driver_init()
  17 *      driver_init - initialize driver model.
  18 *
  19 *      Call the driver model init functions to initialize their
  20 *      subsystems. Called early from init/main.c.
  21 */
  22
  23void __init driver_init(void)
  24{
  25        /* These are the core pieces */
  26        devices_init();
  27        buses_init();
  28        classes_init();
  29        firmware_init();
  30        hypervisor_init();
  31
  32        /* These are also core pieces, but must come after the
  33         * core core pieces.
  34         */
  35        platform_bus_init();
  36        system_bus_init();
  37        cpu_dev_init();
  38        memory_dev_init();
  39        attribute_container_init();
  40}
而2.4稍微不同，但是大致流程相似


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