132 lines
2.7 KiB
C
132 lines
2.7 KiB
C
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#include "devices/shutdown.h"
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#include <console.h>
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#include <stdio.h>
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#include "devices/kbd.h"
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#include "devices/serial.h"
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#include "devices/timer.h"
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#include "threads/io.h"
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#include "threads/thread.h"
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#ifdef USERPROG
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#include "userprog/exception.h"
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#endif
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#ifdef FILESYS
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#include "devices/block.h"
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#include "filesys/filesys.h"
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#endif
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/* Keyboard control register port. */
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#define CONTROL_REG 0x64
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/* How to shut down when shutdown() is called. */
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static enum shutdown_type how = SHUTDOWN_NONE;
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static void print_stats (void);
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/* Shuts down the machine in the way configured by
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shutdown_configure(). If the shutdown type is SHUTDOWN_NONE
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(which is the default), returns without doing anything. */
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void
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shutdown (void)
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{
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switch (how)
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{
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case SHUTDOWN_POWER_OFF:
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shutdown_power_off ();
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break;
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case SHUTDOWN_REBOOT:
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shutdown_reboot ();
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break;
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default:
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/* Nothing to do. */
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break;
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}
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}
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/* Sets TYPE as the way that machine will shut down when Pintos
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execution is complete. */
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void
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shutdown_configure (enum shutdown_type type)
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{
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how = type;
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}
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/* Reboots the machine via the keyboard controller. */
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void
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shutdown_reboot (void)
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{
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printf ("Rebooting...\n");
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/* See [kbd] for details on how to program the keyboard
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* controller. */
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for (;;)
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{
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int i;
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/* Poll keyboard controller's status byte until
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* 'input buffer empty' is reported. */
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for (i = 0; i < 0x10000; i++)
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{
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if ((inb (CONTROL_REG) & 0x02) == 0)
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break;
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timer_udelay (2);
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}
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timer_udelay (50);
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/* Pulse bit 0 of the output port P2 of the keyboard controller.
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* This will reset the CPU. */
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outb (CONTROL_REG, 0xfe);
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timer_udelay (50);
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}
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}
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/* Powers down the machine we're running on,
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as long as we're running on Bochs or QEMU. */
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void
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shutdown_power_off (void)
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{
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const char s[] = "Shutdown";
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const char *p;
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#ifdef FILESYS
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filesys_done ();
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#endif
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print_stats ();
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printf ("Powering off...\n");
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serial_flush ();
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/* This is a special power-off sequence supported by Bochs and
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QEMU, but not by physical hardware. */
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for (p = s; *p != '\0'; p++)
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outb (0x8900, *p);
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/* This will power off a VMware VM if "gui.exitOnCLIHLT = TRUE"
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is set in its configuration file. (The "pintos" script does
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that automatically.) */
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asm volatile ("cli; hlt" : : : "memory");
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/* None of those worked. */
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printf ("still running...\n");
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for (;;);
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}
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/* Print statistics about Pintos execution. */
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static void
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print_stats (void)
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{
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timer_print_stats ();
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thread_print_stats ();
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#ifdef FILESYS
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block_print_stats ();
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#endif
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console_print_stats ();
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kbd_print_stats ();
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#ifdef USERPROG
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exception_print_stats ();
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#endif
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}
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