nuclear@51: #include <stdio.h>
nuclear@51: #include "syscall.h"
nuclear@51: #include "intr.h"
nuclear@51: #include "proc.h"
nuclear@51: #include "sched.h"
nuclear@51: #include "timer.h"
nuclear@51: 
nuclear@51: static int (*sys_func[NUM_SYSCALLS])();
nuclear@51: 
nuclear@52: static void syscall(int inum);
nuclear@51: 
nuclear@51: static int sys_exit(int status);
nuclear@51: static int sys_hello(void);
nuclear@51: static int sys_sleep(int sec);
nuclear@51: 
nuclear@51: void init_syscall(void)
nuclear@51: {
nuclear@51: 	sys_func[SYS_EXIT] = sys_exit;
nuclear@51: 	sys_func[SYS_HELLO] = sys_hello;
nuclear@51: 	sys_func[SYS_SLEEP] = sys_sleep;
nuclear@51: 
nuclear@51: 	interrupt(SYSCALL_INT, syscall);
nuclear@51: }
nuclear@51: 
nuclear@52: static void syscall(int inum)
nuclear@51: {
nuclear@52: 	struct intr_frame *frm;
nuclear@52: 	int idx;
nuclear@52: 
nuclear@52: 	frm = get_intr_frame();
nuclear@52: 	idx = frm->regs.eax;
nuclear@51: 
nuclear@51: 	if(idx < 0 || idx >= NUM_SYSCALLS) {
nuclear@51: 		printf("invalid syscall: %d\n", idx);
nuclear@51: 		return;
nuclear@51: 	}
nuclear@51: 
nuclear@51: 	frm->regs.eax = sys_func[idx](frm->regs.ebx, frm->regs.ecx, frm->regs.edx, frm->regs.esi, frm->regs.edi);
nuclear@51: 	schedule();
nuclear@51: }
nuclear@51: 
nuclear@51: static int sys_exit(int status)
nuclear@51: {
nuclear@51: 	return -1;	/* not implemented yet */
nuclear@51: }
nuclear@51: 
nuclear@51: static int sys_hello(void)
nuclear@51: {
nuclear@51: 	/*printf("process %d says hello!\n", get_current_pid());*/
nuclear@51: 	return 0;
nuclear@51: }
nuclear@51: 
nuclear@51: static int sys_sleep(int sec)
nuclear@51: {
nuclear@51: 	int pid = get_current_pid();
nuclear@51: 	/*printf("process %d will sleep for %d sec\n", pid, sec);*/
nuclear@51: 	start_timer(sec * 1000, (timer_func_t)unblock_proc, (void*)pid);
nuclear@51: 	block_proc(pid);
nuclear@51: 	return 0;
nuclear@51: }