LK top lk_main处理

lk/top/main.c

/* called from arch code */void lk_main(ulong arg0, ulong arg1, ulong arg2, ulong arg3){    // save the boot args    lk_boot_args[0] = arg0;    lk_boot_args[1] = arg1;    lk_boot_args[2] = arg2;    lk_boot_args[3] = arg3;
    // get us into some sort of thread context    thread_init_early();
    // early arch stuff    lk_primary_cpu_init_level(LK_INIT_LEVEL_EARLIEST, LK_INIT_LEVEL_ARCH_EARLY - 1);    arch_early_init();
    // do any super early platform initialization    lk_primary_cpu_init_level(LK_INIT_LEVEL_ARCH_EARLY, LK_INIT_LEVEL_PLATFORM_EARLY - 1);    platform_early_init();
    // do any super early target initialization    lk_primary_cpu_init_level(LK_INIT_LEVEL_PLATFORM_EARLY, LK_INIT_LEVEL_TARGET_EARLY - 1);    target_early_init();
#if WITH_SMP    dprintf(INFO, "\nwelcome to lk/MP\n\n");#else    dprintf(INFO, "\nwelcome to lk\n\n");#endif    dprintf(INFO, "boot args 0x%lx 0x%lx 0x%lx 0x%lx\n",            lk_boot_args[0], lk_boot_args[1], lk_boot_args[2], lk_boot_args[3]);
    // bring up the kernel heap    lk_primary_cpu_init_level(LK_INIT_LEVEL_TARGET_EARLY, LK_INIT_LEVEL_HEAP - 1);    dprintf(SPEW, "initializing heap\n");    heap_init();
    // deal with any static constructors    dprintf(SPEW, "calling constructors\n");    call_constructors();
    // initialize the kernel    lk_primary_cpu_init_level(LK_INIT_LEVEL_HEAP, LK_INIT_LEVEL_KERNEL - 1);    kernel_init();
    lk_primary_cpu_init_level(LK_INIT_LEVEL_KERNEL, LK_INIT_LEVEL_THREADING - 1);
    // create a thread to complete system initialization    dprintf(SPEW, "creating bootstrap completion thread\n");    thread_t *t = thread_create("bootstrap2", &bootstrap2, NULL, DEFAULT_PRIORITY, DEFAULT_STACK_SIZE);    thread_set_pinned_cpu(t, 0);    thread_detach(t);    thread_resume(t);
    // become the idle thread and enable interrupts to start the scheduler    thread_become_idle();}