PcAtChipsetPkg/KbcResetDxe/Reset.c

   1 /*++
   2
   3 Copyright (c) 2006, Intel Corporation
   4 All rights reserved. This program and the accompanying materials
   5 are licensed and made available under the terms and conditions of the BSD License
   6 which accompanies this distribution.  The full text of the license may be found at
   7 http://opensource.org/licenses/bsd-license.php
   8
   9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11
  12 Module Name:
  13   Reset.c
  14
  15 Abstract:
  16
  17   Reset Architectural Protocol implementation
  18
  19 --*/
  20
  21 #include "Reset.h"
  22
  23 VOID
  24 EFIAPI
  25 KbcResetSystem (
  26   IN EFI_RESET_TYPE   ResetType,
  27   IN EFI_STATUS       ResetStatus,
  28   IN UINTN            DataSize,
  29   IN VOID             *ResetData OPTIONAL
  30   )
  31 /*++
  32
  33 Routine Description:
  34
  35   Reset the system.
  36
  37 Arguments:
  38
  39     ResetType - warm or cold
  40     ResetStatus - possible cause of reset
  41     DataSize - Size of ResetData in bytes
  42     ResetData - Optional Unicode string
  43     For details, see efiapi.h
  44
  45 Returns:
  46   Does not return if the reset takes place.
  47   EFI_INVALID_PARAMETER   If ResetType is invalid.
  48
  49 --*/
  50 {
  51   UINT8   Data;
  52
  53   switch (ResetType) {
  54   case EfiResetWarm:
  55   case EfiResetCold:
  56   case EfiResetShutdown:
  57     Data = 0xfe;
  58     IoWrite8 (0x64, Data);
  59     break;
  60
  61   default:
  62     return ;
  63   }
  64
  65   //
  66   // Given we should have reset getting here would be bad
  67   //
  68   ASSERT (FALSE);
  69 }
  70