EmulatorPkg/ResetRuntimeDxe/Reset.c

   1 /*++ @file
   2   Reset Architectural Protocol as defined in UEFI/PI under Emulation
   3
   4 Copyright (c) 2004 - 2009, Intel Corporation. All rights reserved.<BR>
   5 Portions copyright (c) 2010 - 2011, Apple Inc. All rights reserved.
   6 SPDX-License-Identifier: BSD-2-Clause-Patent
   7
   8 **/
   9
  10 #include <PiDxe.h>
  11
  12 #include <Library/BaseLib.h>
  13 #include <Library/DebugLib.h>
  14 #include <Library/UefiLib.h>
  15 #include <Library/UefiDriverEntryPoint.h>
  16 #include <Library/MemoryAllocationLib.h>
  17 #include <Library/UefiBootServicesTableLib.h>
  18 #include <Library/EmuThunkLib.h>
  19
  20 #include <Protocol/Reset.h>
  21
  22
  23 VOID
  24 EFIAPI
  25 EmuResetSystem (
  26   IN EFI_RESET_TYPE   ResetType,
  27   IN EFI_STATUS       ResetStatus,
  28   IN UINTN            DataSize,
  29   IN VOID             *ResetData OPTIONAL
  30   )
  31 {
  32   EFI_STATUS  Status;
  33   UINTN       HandleCount;
  34   EFI_HANDLE  *HandleBuffer;
  35   UINTN       Index;
  36
  37   //
  38   // Disconnect all
  39   //
  40   Status = gBS->LocateHandleBuffer (
  41                   AllHandles,
  42                   NULL,
  43                   NULL,
  44                   &HandleCount,
  45                   &HandleBuffer
  46                   );
  47   if (!EFI_ERROR (Status)) {
  48     for (Index = 0; Index < HandleCount; Index++) {
  49       Status = gBS->DisconnectController (HandleBuffer[Index], NULL, NULL);
  50     }
  51
  52     gBS->FreePool (HandleBuffer);
  53   }
  54
  55
  56   //
  57   // Discard ResetType, always return 0 as exit code
  58   //
  59   gEmuThunk->Exit (0);
  60
  61   //
  62   // Should never go here
  63   //
  64   ASSERT (FALSE);
  65
  66   return;
  67 }
  68
  69
  70
  71 EFI_STATUS
  72 EFIAPI
  73 InitializeEmuReset (
  74   IN EFI_HANDLE        ImageHandle,
  75   IN EFI_SYSTEM_TABLE  *SystemTable
  76   )
  77 /*++
  78
  79 Routine Description:
  80
  81
  82 Arguments:
  83
  84   ImageHandle of the loaded driver
  85   Pointer to the System Table
  86
  87 Returns:
  88
  89   Status
  90 **/
  91 {
  92   EFI_STATUS  Status;
  93   EFI_HANDLE  Handle;
  94
  95   SystemTable->RuntimeServices->ResetSystem = EmuResetSystem;
  96
  97   Handle = NULL;
  98   Status = gBS->InstallMultipleProtocolInterfaces (
  99                   &Handle,
 100                   &gEfiResetArchProtocolGuid,
 101                   NULL,
 102                   NULL
 103                   );
 104   ASSERT_EFI_ERROR (Status);
 105
 106   return Status;
 107 }
 108