int main(int argc, char **argv)
{
/* init hardware */
if(init_hardware("hardware.ini") == 0)
{
fprintf(stderr, "Error in hardware initialization\n");
exit(EXIT_FAILURE);
}
init_swap("swapfile");
memset(vm_mapping, 0, sizeof(struct vm_mapping_s) * VM_PAGES);
memset(pm_mapping, 0, sizeof(struct pm_mapping_s) * PM_PAGES);
IRQVECTOR[MMU_IRQ] = mmuhandler;
_mask(0x1001);
user_process();
return 0;
}
void
os_init_cont(void) {
/* Reset the GDT. Although user processes in Nanos run in Ring 0,
they have their own virtual address space. Therefore, the
old GDT located in physical address 0x7C00 cannot be used again. */
init_segment();
/* Initialize the serial port. After that, you can use printk() */
init_serial();
/* Set up interrupt and exception handlers,
just as we did in the game. */
init_idt();
/* Initialize the intel 8259 PIC. */
//The Intel 8259 is a Programmable Interrupt Controller (PIC)
init_intr();
/**
initialize kmalloc -- have to initialize it before init
process, for using it in allocating memory for PCB
*/
init_kmalloc();
// make it NOINTR, can receive msg, can schedule
init_idle();
NOINTR;
/**
init_driver() have to before init_file_system() for FM have
to send message to `ide` to read file system
*/
init_driver();
init_manager();
NOINTR;
init_error_msg();
// init_proc() and init_manager() can replace??
// solved by split set count_of_lock out of init_proc();
//more_frequent();
// init empty thread
init_proc_test();
// here is to initialize shell process, which must later
// than init_manager -- for it will send message to
// managers
//ram_user_process();
// @checked: move from locked state to unlocked state
init_file_system();
unlock(); // set interrupt enabled
INTR;
/**
init_file_system() have to before init_proc()
for init_proc() will using the `default_cwd` which is
initialized by FM
*/
/* Initialize the state of process idle, ie the running
process for set up right lock num to avoid other
initialization enable the interrupt and cause problem
*/
// @checked: move from locked state to unlocked state
welcome();
user_process();
// set idle not to using cpu time
// for it is originally set to sleep when send message
current->state = SLEEPED;
/* This context now becomes the idle process. */
while (1) {
printk("!");
wait_intr();
}
}
