#include devices/shutdown.h
#include
#include
#include devices/kbd.h
#include devices/serial.h
#include devices/timer.h
#include threads/io.h
#include threads/thread.h
#ifdef USERPROG
#include userprog/exception.h
#endif
#ifdef FILESYS
#include devices/block.h
#include filesys/filesys.h
#endif
/* Keyboard control register port. */
#define CONTROL_REG 0x64
/* How to shut down when shutdown() is called. */
static enum shutdown_type how = SHUTDOWN_NONE;
static void print_stats (void);
/* Shuts down the machine in the way configured by
shutdown_configure().If the shutdown type is SHUTDOWN_NONE
(which is the default), returns without doing anything. */
void
shutdown (void)
{
switch (how)
{
case SHUTDOWN_POWER_OFF:
shutdown_power_off ();
break;
case SHUTDOWN_REBOOT:
shutdown_reboot ();
break;
default:
/* Nothing to do. */
break;
}
}
/* Sets TYPE as the way that machine will shut down when Pintos
execution is complete. */
void
shutdown_configure (enum shutdown_type type)
{
how = type;
}
/* Reboots the machine via the keyboard controller. */
void
shutdown_reboot (void)
{
printf (Rebooting
);
/* See [kbd] for details on how to program the keyboard
* controller. */
for (;;)
{
int i;
/* Poll keyboard controllers status byte until
* input buffer empty is reported. */
for (i = 0; i < 0x10000; i++){if ((inb (CONTROL_REG) & 0x02) == 0)break;timer_udelay (2);}timer_udelay (50);/* Pulse bit 0 of the output port P2 of the keyboard controller. * This will reset the CPU. */outb (CONTROL_REG, 0xfe);timer_udelay (50);}}/* Powers down the machine we’re running on, as long as we’re running on Bochs or QEMU. */voidshutdown_power_off (void){const char s[] = “Shutdown”;//const char s[] = “System_powerdown”;const char *p;#ifdef FILESYSfilesys_done ();#endifprint_stats ();printf (“Powering off…
“);serial_flush ();/* This is a special power-off sequence supported by Bochs and QEMU, but not by physical hardware. */for (p = s; *p != ‘