lk_init_struct结构

lk/include/lk/init.h

typedef void (*lk_init_hook)(uint level);

struct lk_init_struct {
    uint level;
    uint flags;
    lk_init_hook hook;
    const char *name;
};

#define LK_INIT_HOOK_FLAGS(_name, _hook, _level, _flags) \
    const struct lk_init_struct _init_struct_##_name __ALIGNED(sizeof(void *)) __SECTION(".lk_init") = { \
        .level = _level, \
        .flags = _flags, \
        .hook = _hook, \
        .name = #_name, \
    };
#define LK_INIT_HOOK(_name, _hook, _level) \
    LK_INIT_HOOK_FLAGS(_name, _hook, _level, LK_INIT_FLAG_PRIMARY_CPU)

示例：

/* secondary cpu initialize the timer just before the kernel starts with interrupts enabled */
LK_INIT_HOOK_FLAGS(arm_cortex_a9_timer_init_percpu,
                   arm_cortex_a9_timer_init_percpu,
                   LK_INIT_LEVEL_THREADING - 1, LK_INIT_FLAG_SECONDARY_CPUS);

/* secondary cpu initialize the timer just before the kernel starts with interrupts enabled */
LK_INIT_HOOK_FLAGS(arm_generic_timer_init_secondary_cpu,
                   arm_generic_timer_init_secondary_cpu,
                   LK_INIT_LEVEL_THREADING - 1, LK_INIT_FLAG_SECONDARY_CPUS);

LK_INIT_HOOK_FLAGS(arm_generic_timer_resume_cpu, arm_generic_timer_resume_cpu,
                   LK_INIT_LEVEL_PLATFORM, LK_INIT_FLAG_CPU_RESUME);

LK_INIT_HOOK_FLAGS(arm_gic_init_percpu,
                   arm_gic_init_percpu,
                   LK_INIT_LEVEL_PLATFORM_EARLY, LK_INIT_FLAG_SECONDARY_CPUS);

LK_INIT_HOOK_FLAGS(arm_gic_suspend_cpu, arm_gic_suspend_cpu,
                   LK_INIT_LEVEL_PLATFORM, LK_INIT_FLAG_CPU_SUSPEND);

LK_INIT_HOOK_FLAGS(arm_gic_resume_cpu, arm_gic_resume_cpu,
                   LK_INIT_LEVEL_PLATFORM, LK_INIT_FLAG_CPU_RESUME);

LK_INIT_HOOK(bootargs, bootargs_init_hook, LK_INIT_LEVEL_THREADING);

LK_INIT_HOOK(console, console_init_hook, LK_INIT_LEVEL_PLATFORM_EARLY - 1);
LK_INIT_HOOK(pktbuf, pktbuf_init, LK_INIT_LEVEL_THREADING);
LK_INIT_HOOK(ptable, &ptable_init, LK_INIT_LEVEL_THREADING);
LK_INIT_HOOK(sysparam, &sysparam_init, LK_INIT_LEVEL_THREADING);
LK_INIT_HOOK(usb, usb_init, LK_INIT_LEVEL_THREADING);

LK_INIT_HOOK(vm_preheap, &vm_init_preheap, LK_INIT_LEVEL_HEAP - 1);
LK_INIT_HOOK(vm, &vm_init_postheap, LK_INIT_LEVEL_VM);