CS代考计算机代写 #include “devices/shutdown.h”

#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…\n”);

/* See [kbd] for details on how to program the keyboard
* controller. */
for (;;)
{
int i;

/* Poll keyboard controller’s 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. */ void shutdown_power_off (void) { const char s[] = "Shutdown"; //const char s[] = "System_powerdown"; const char *p; #ifdef FILESYS filesys_done (); #endif print_stats (); printf ("Powering off...\n"); serial_flush (); /* This is a special power-off sequence supported by Bochs and QEMU, but not by physical hardware. */ for (p = s; *p != '\0'; p++){ outb (0x8900, *p); } // outw (0xB004, 0x00 | 0x2000); outw (0x604, 0x00 | 0x2000); /* This will power off a VMware VM if "gui.exitOnCLIHLT = TRUE" is set in its configuration file. (The "pintos" script does that automatically.) */ //exit(-1); // for (;;); asm volatile ("cli; hlt" : : : "memory"); /* None of those worked. */ printf ("still running...\n"); for (;;); } /* Print statistics about Pintos execution. */ static void print_stats (void) { timer_print_stats (); thread_print_stats (); #ifdef FILESYS block_print_stats (); #endif console_print_stats (); kbd_print_stats (); #ifdef USERPROG exception_print_stats (); #endif }