void NORETURN __enter_thread_mode(void)
{
irq_enable();
__context_restore();
__asm__ volatile("ret");
UNREACHABLE();
}
int __init main()
{
/* keep the calling order below because of dependencies */
sys_init();
mm_init();
fs_init();
device_init();
systick_init();
scheduler_init();
console_init();
make_init_task();
load_user_task(); /* that are registered statically */
softirq_init();
#ifdef CONFIG_TIMER
timer_init();
#endif
#ifndef DEFSTR
#define DEFMKSTR(x) #x
#define DEFSTR(x) DEFMKSTR(x)
#endif
/* a banner */
printk("yaos %s %s\n", DEFSTR(VERSION), DEFSTR(MACHINE));
/* switch from boot stack memory to new one */
set_user_sp(init.mm.sp);
set_kernel_sp(init.mm.kernel.sp);
/* everything ready now */
#ifndef ARMv7A
sei();
#endif
resched();
/* it doesn't really reach up to this point. init task becomes idle as
* its context is already set to idle */
__context_restore(current);
__ret_from_exc(0);
freeze();
return 0;
}
// Use this interrupt to perform all context switches
ISR(AVR_CONTEXT_SWAP_INTERRUPT_VECT, ISR_NAKED) {
__context_save();
sched_run();
__context_restore();
__asm__ volatile("reti");
}
