PcAtChipsetPkg/KbcResetDxe/ResetEntry.c

   1 /** @file
   2   Driver entry for KbcReset driver.
   3
   4 Copyright (c) 2009 - 2010, Intel Corporation. All rights reserved.<BR>
   5 This program and the accompanying materials
   6 are licensed and made available under the terms and conditions of the BSD License
   7 which accompanies this distribution.  The full text of the license may be found at
   8 http://opensource.org/licenses/bsd-license.php
   9
  10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12 **/
  13
  14 #include <PiDxe.h>
  15
  16 #include <Library/DebugLib.h>
  17 #include <Library/UefiBootServicesTableLib.h>
  18 #include <Library/ResetSystemLib.h>
  19
  20 #include <Protocol/Reset.h>
  21
  22 //
  23 // The handle onto which the Reset Architectural Protocol is installed
  24 //
  25 EFI_HANDLE  mResetHandle = NULL;
  26
  27 /**
  28   Reset the system.
  29
  30   @param ResetType       warm or cold
  31   @param ResetStatus     possible cause of reset
  32   @param DataSize        Size of ResetData in bytes
  33   @param ResetData       Optional Unicode string
  34
  35 **/
  36 VOID
  37 EFIAPI
  38 KbcResetSystem (
  39   IN EFI_RESET_TYPE   ResetType,
  40   IN EFI_STATUS       ResetStatus,
  41   IN UINTN            DataSize,
  42   IN VOID             *ResetData OPTIONAL
  43   )
  44 {
  45   switch (ResetType) {
  46   case EfiResetWarm:
  47     ResetWarm ();
  48     break;
  49   case EfiResetCold:
  50     ResetCold ();
  51     break;
  52   case EfiResetShutdown:
  53     ResetShutdown ();
  54     break;
  55   default:
  56     return;
  57   }
  58
  59   //
  60   // Given we should have reset getting here would be bad
  61   //
  62   ASSERT (FALSE);
  63 }
  64
  65 /**
  66   Initialize the state information for the Reset Architectural Protocol.
  67
  68   @param ImageHandle     Handle of the loaded driver
  69   @param SystemTable     Pointer to the System Table
  70
  71   @retval EFI_SUCCESS           Thread can be successfully created
  72   @retval EFI_OUT_OF_RESOURCES  Cannot allocate protocol data structure
  73   @retval EFI_DEVICE_ERROR      Cannot create the timer service
  74
  75 **/
  76 EFI_STATUS
  77 EFIAPI
  78 InitializeReset (
  79   IN EFI_HANDLE        ImageHandle,
  80   IN EFI_SYSTEM_TABLE  *SystemTable
  81   )
  82 {
  83   EFI_STATUS  Status;
  84
  85   //
  86   // Make sure the Reset Architectural Protocol is not already installed in the system
  87   //
  88   ASSERT_PROTOCOL_ALREADY_INSTALLED (NULL, &gEfiResetArchProtocolGuid);
  89
  90   //
  91   // Hook the runtime service table
  92   //
  93   SystemTable->RuntimeServices->ResetSystem = KbcResetSystem;
  94
  95   //
  96   // Now install the Reset RT AP on a new handle
  97   //
  98   Status = gBS->InstallMultipleProtocolInterfaces (
  99                   &mResetHandle,
 100                   &gEfiResetArchProtocolGuid, NULL,
 101                   NULL
 102                   );
 103   ASSERT_EFI_ERROR (Status);
 104
 105   return Status;
 106 }