reactos/hal/halx86/generic/reboot.c

   1 /* $Id$
   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 #include <hal.h>
  13 #define NDEBUG
  14 #include <debug.h>
  15
  16
  17 static VOID
  18 HalReboot (VOID)
  19 {
  20     char data;
  21     extern PVOID HalpZeroPageMapping;
  22
  23     /* enable warm reboot */
  24     ((PUCHAR)HalpZeroPageMapping)[0x472] = 0x34;
  25     ((PUCHAR)HalpZeroPageMapping)[0x473] = 0x12;
  26
  27     /* disable interrupts */
  28     Ki386DisableInterrupts();
  29
  30
  31     /* disable periodic interrupt (RTC) */
  32     WRITE_PORT_UCHAR((PUCHAR)0x70, 0x0b);
  33     data = READ_PORT_UCHAR((PUCHAR)0x71);
  34     WRITE_PORT_UCHAR((PUCHAR)0x71, (UCHAR)(data & 0xbf));
  35
  36     /* */
  37     WRITE_PORT_UCHAR((PUCHAR)0x70, 0x0a);
  38     data = READ_PORT_UCHAR((PUCHAR)0x71);
  39     WRITE_PORT_UCHAR((PUCHAR)0x71, (UCHAR)((data & 0xf0) | 0x06));
  40
  41     /* */
  42     WRITE_PORT_UCHAR((PUCHAR)0x70, 0x15);
  43
  44     /* generate RESET signal via keyboard controller */
  45     WRITE_PORT_UCHAR((PUCHAR)0x64, 0xfe);
  46
  47     /* stop the processor */
  48 #if 1
  49     Ki386HaltProcessor();
  50     for(;;);
  51 #endif
  52 }
  53
  54
  55 VOID STDCALL
  56 HalReturnToFirmware (
  57         FIRMWARE_REENTRY        Action
  58         )
  59 {
  60     if (Action == HalHaltRoutine)
  61     {
  62         DbgPrint ("HalReturnToFirmware called!\n");
  63         DbgBreakPoint ();
  64     }
  65     else if (Action == HalRebootRoutine)
  66     {
  67         HalReboot ();
  68     }
  69 }
  70
  71 /* EOF */