reactos/ntoskrnl/hal/x86/reboot.c

   1 /* $Id: reboot.c,v 1.4 2000/03/19 13:34:47 ekohl Exp $
   2  *
   3  * COPYRIGHT:       See COPYING in the top level directory
   4  * PROJECT:         ReactOS kernel
   5  * FILE:            ntoskrnl/hal/x86/reboot.c
   6  * PURPOSE:         Reboot functions.
   7  * PROGRAMMER:      Eric Kohl (ekohl@abo.rhein-zeitung.de)
   8  * UPDATE HISTORY:
   9  *                  Created 11/10/99
  10  */
  11
  12
  13 #include <ddk/ntddk.h>
  14 #include <internal/hal.h>
  15 #include <internal/i386/io.h>
  16
  17
  18 static VOID
  19 HalReboot (VOID)
  20 {
  21     char data;
  22     BYTE *mem;
  23
  24     /* enable warm reboot */
  25     mem = (BYTE *)(0xd0000000 + 0x0000);
  26 //    mem = HalMapPhysicalMemory (0, 1);
  27     mem[0x472] = 0x34;
  28     mem[0x473] = 0x12;
  29
  30     /* disable interrupts */
  31     __asm__("cli\n");
  32
  33     /* disable periodic interrupt (RTC) */
  34     outb_p (0x70, 0x0b);
  35     data = inb_p (0x71);
  36     outb_p (0x71, data & 0xbf);
  37
  38     /* */
  39     outb_p (0x70, 0x0a);
  40     data = inb_p (0x71);
  41     outb_p (0x71, (data & 0xf0) | 0x06);
  42
  43     /* */
  44     outb_p (0x70, 0x15);
  45
  46     /* generate RESET signal via keyboard controller */
  47     outb_p (0x64, 0xfe);
  48
  49     /* stop the processor */
  50     __asm__("hlt\n");
  51 }
  52
  53
  54 VOID
  55 STDCALL
  56 HalReturnToFirmware (
  57         ULONG   Action
  58         )
  59 {
  60     if (Action == FIRMWARE_HALT)
  61     {
  62         DbgPrint ("HalReturnToFirmware called!\n");
  63         DbgBreakPoint ();
  64     }
  65     else if (Action == FIRMWARE_REBOOT)
  66     {
  67         HalResetDisplay ();
  68         HalReboot ();
  69     }
  70 }
  71
  72 /* EOF */