void
game_init(void) {
init_serial();
init_timer();
init_idt();
init_intr();
set_timer_intr_handler(timer_event);
set_keyboard_intr_handler(keyboard_event);
printk("game start!\n");
enable_interrupt();
main_loop();
assert(0); /* main_loop是死循环，永远无法返回这里 */
}
void init_cond()
{
init_segment();
init_idt();
init_intr();
init_serial();
init_timer();
init_mem();
sem_init();
readsect((void *)directory_d.entries,201 + 256);
printk("Filename = %s\n",directory_d.entries[0].filename);
env_init();
kernel_env.file[0].opened = true;
kernel_env.file[0].offset = 0;
curenv = &kernel_env;
set_timer_intr_handler(kernel_timer_event);
//asm volatile("cli");
env_create(200,0,ENV_TYPE_USER);
env_run(&envs[0]);
}
void
game_init(void) {
/* Setting up a 100Hz timer */
init_100hz_timer();
/* Setting up the interrupt descriptor table,
this procedure installs ``actual'' interrupt handlers */
init_idt();
/* Setting up the interrupt controller i8259,
the interrupt code will start at 32,
and i8259 will send end-of-interrupt signal automatically */
init_intr();
/* Setting up the game interrupt handlers.
the start_frame and key_stroke procedures are wrapped by
our interrupt handler to make interrupts transparent.
For implementation, you simply need to know that start_frame
is called for every timer interrupt, and so does key_stroke
for every keyboard interrupt (press or release). */
set_timer_intr_handler(start_frame);
set_keyboard_intr_handler(key_stroke);
/* Calls the game logic.
All game logic related codes are in game.c */
init_game();
/* Just a ``sti'' instruction */
enable_interrupt();
/* The main loop now needs to do nothing but wait for
coming endless interrupts.
All game tasks are done in the interrupt handler. */
while (1) {
idle_cpu();
}
}
