DuetPkg/AcpiResetDxe/ResetEntry.c

   1 /*++ @file
   2   Entrypoint of AcpiResetDxe driver.
   3
   4 Copyright (c) 2010, Intel Corporation
   5 All rights reserved. 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 "Reset.h"
  15
  16 EFI_ACPI_DESCRIPTION  mAcpiDescription;
  17
  18 /**
  19   Reset the system.
  20
  21   @param[in] ResetType       Warm or cold
  22   @param[in] ResetStatus     Possible cause of reset
  23   @param[in] DataSize        Size of ResetData in bytes
  24   @param[in] ResetData       Optional Unicode string
  25
  26 **/
  27 VOID
  28 EFIAPI
  29 EfiAcpiResetSystem (
  30   IN EFI_RESET_TYPE   ResetType,
  31   IN EFI_STATUS       ResetStatus,
  32   IN UINTN            DataSize,
  33   IN CHAR16           *ResetData OPTIONAL
  34   )
  35 {
  36   AcpiResetSystem (ResetType, ResetStatus, DataSize, ResetData, &mAcpiDescription);
  37 }
  38
  39 /**
  40   Initialize the state information for the Reset Architectural Protocol.
  41
  42   @param[in] ImageHandle  Image handle of the loaded driver
  43   @param[in] SystemTable  Pointer to the System Table
  44
  45   @retval EFI_SUCCESS           Thread can be successfully created
  46   @retval EFI_UNSUPPORTED       Cannot find the info to reset system
  47
  48 **/
  49 EFI_STATUS
  50 EFIAPI
  51 InitializeReset (
  52   IN EFI_HANDLE        ImageHandle,
  53   IN EFI_SYSTEM_TABLE  *SystemTable
  54   )
  55 {
  56   EFI_STATUS            Status;
  57   EFI_HANDLE            Handle;
  58   //
  59   // Initialize AcpiDescription
  60   //
  61   if (!GetAcpiDescription (&mAcpiDescription)) {
  62     return EFI_UNSUPPORTED;
  63   }
  64
  65   //
  66   // Make sure the Reset Architectural Protocol is not already installed in the system
  67   //
  68   ASSERT_PROTOCOL_ALREADY_INSTALLED (NULL, &gEfiResetArchProtocolGuid);
  69
  70   //
  71   // Hook the runtime service table
  72   //
  73   SystemTable->RuntimeServices->ResetSystem = EfiAcpiResetSystem;
  74
  75   //
  76   // Now install the Reset RT AP on a new handle
  77   //
  78   Handle = NULL;
  79   Status = gBS->InstallMultipleProtocolInterfaces (
  80                   &Handle,
  81                   &gEfiResetArchProtocolGuid,
  82                   NULL,
  83                   NULL
  84                   );
  85   ASSERT_EFI_ERROR (Status);
  86
  87   return Status;
  88 }